pub(crate) mod dap; pub(crate) mod lsp; pub(crate) mod typed; pub use dap::*; use helix_stdx::rope::{self, RopeSliceExt}; use helix_vcs::Hunk; pub use lsp::*; use tui::widgets::Row; pub use typed::*; use helix_core::{ char_idx_at_visual_offset, chars::char_is_word, comment, doc_formatter::TextFormat, encoding, find_workspace, graphemes::{self, next_grapheme_boundary, RevRopeGraphemes}, history::UndoKind, increment, indent, indent::IndentStyle, line_ending::{get_line_ending_of_str, line_end_char_index, str_is_line_ending}, match_brackets, movement::{self, move_vertically_visual, Direction}, object, pos_at_coords, regex::{self, Regex}, search::{self, CharMatcher}, selection, shellwords, surround, syntax::{BlockCommentToken, LanguageServerFeature}, text_annotations::{Overlay, TextAnnotations}, textobject, unicode::width::UnicodeWidthChar, visual_offset_from_block, Deletion, LineEnding, Position, Range, Rope, RopeGraphemes, RopeReader, RopeSlice, Selection, SmallVec, Tendril, Transaction, }; use helix_view::{ document::{FormatterError, Mode, SCRATCH_BUFFER_NAME}, editor::Action, info::Info, input::KeyEvent, keyboard::KeyCode, tree, view::View, Document, DocumentId, Editor, ViewId, }; use anyhow::{anyhow, bail, ensure, Context as _}; use insert::*; use movement::Movement; use crate::{ args, compositor::{self, Component, Compositor}, filter_picker_entry, job::Callback, keymap::ReverseKeymap, ui::{self, overlay::overlaid, Picker, Popup, Prompt, PromptEvent}, }; use crate::job::{self, Jobs}; use std::{ cmp::Ordering, collections::{HashMap, HashSet}, fmt, future::Future, io::Read, num::NonZeroUsize, }; use std::{ borrow::Cow, path::{Path, PathBuf}, }; use once_cell::sync::Lazy; use serde::de::{self, Deserialize, Deserializer}; use url::Url; use grep_regex::RegexMatcherBuilder; use grep_searcher::{sinks, BinaryDetection, SearcherBuilder}; use ignore::{DirEntry, WalkBuilder, WalkState}; pub type OnKeyCallback = Box; pub struct Context<'a> { pub register: Option, pub count: Option, pub editor: &'a mut Editor, pub callback: Vec, pub on_next_key_callback: Option, pub jobs: &'a mut Jobs, } impl<'a> Context<'a> { /// Push a new component onto the compositor. pub fn push_layer(&mut self, component: Box) { self.callback .push(Box::new(|compositor: &mut Compositor, _| { compositor.push(component) })); } /// Call `replace_or_push` on the Compositor pub fn replace_or_push_layer(&mut self, id: &'static str, component: T) { self.callback .push(Box::new(move |compositor: &mut Compositor, _| { compositor.replace_or_push(id, component); })); } #[inline] pub fn on_next_key( &mut self, on_next_key_callback: impl FnOnce(&mut Context, KeyEvent) + 'static, ) { self.on_next_key_callback = Some(Box::new(on_next_key_callback)); } #[inline] pub fn callback( &mut self, call: impl Future> + 'static + Send, callback: F, ) where T: for<'de> serde::Deserialize<'de> + Send + 'static, F: FnOnce(&mut Editor, &mut Compositor, T) + Send + 'static, { self.jobs.callback(make_job_callback(call, callback)); } /// Returns 1 if no explicit count was provided #[inline] pub fn count(&self) -> usize { self.count.map_or(1, |v| v.get()) } } #[inline] fn make_job_callback( call: impl Future> + 'static + Send, callback: F, ) -> std::pin::Pin>>> where T: for<'de> serde::Deserialize<'de> + Send + 'static, F: FnOnce(&mut Editor, &mut Compositor, T) + Send + 'static, { Box::pin(async move { let json = call.await?; let response = serde_json::from_value(json)?; let call: job::Callback = Callback::EditorCompositor(Box::new( move |editor: &mut Editor, compositor: &mut Compositor| { callback(editor, compositor, response) }, )); Ok(call) }) } use helix_view::{align_view, Align}; /// A MappableCommand is either a static command like "jump_view_up" or a Typable command like /// :format. It causes a side-effect on the state (usually by creating and applying a transaction). /// Both of these types of commands can be mapped with keybindings in the config.toml. #[derive(Clone)] pub enum MappableCommand { Typable { name: String, args: Vec, doc: String, }, Static { name: &'static str, fun: fn(cx: &mut Context), doc: &'static str, }, } macro_rules! static_commands { ( $($name:ident, $doc:literal,)* ) => { $( #[allow(non_upper_case_globals)] pub const $name: Self = Self::Static { name: stringify!($name), fun: $name, doc: $doc }; )* pub const STATIC_COMMAND_LIST: &'static [Self] = &[ $( Self::$name, )* ]; } } impl MappableCommand { pub fn execute(&self, cx: &mut Context) { match &self { Self::Typable { name, args, doc: _ } => { let args: Vec> = args.iter().map(Cow::from).collect(); if let Some(command) = typed::TYPABLE_COMMAND_MAP.get(name.as_str()) { let mut cx = compositor::Context { editor: cx.editor, jobs: cx.jobs, scroll: None, }; if let Err(e) = (command.fun)(&mut cx, &args[..], PromptEvent::Validate) { cx.editor.set_error(format!("{}", e)); } } } Self::Static { fun, .. } => (fun)(cx), } } pub fn name(&self) -> &str { match &self { Self::Typable { name, .. } => name, Self::Static { name, .. } => name, } } pub fn doc(&self) -> &str { match &self { Self::Typable { doc, .. } => doc, Self::Static { doc, .. } => doc, } } #[rustfmt::skip] static_commands!( no_op, "Do nothing", move_char_left, "Move left", move_char_right, "Move right", move_line_up, "Move up", move_line_down, "Move down", move_visual_line_up, "Move up", move_visual_line_down, "Move down", extend_char_left, "Extend left", extend_char_right, "Extend right", extend_line_up, "Extend up", extend_line_down, "Extend down", extend_visual_line_up, "Extend up", extend_visual_line_down, "Extend down", copy_selection_on_next_line, "Copy selection on next line", copy_selection_on_prev_line, "Copy selection on previous line", move_next_word_start, "Move to start of next word", move_prev_word_start, "Move to start of previous word", move_next_word_end, "Move to end of next word", move_prev_word_end, "Move to end of previous word", move_next_long_word_start, "Move to start of next long word", move_prev_long_word_start, "Move to start of previous long word", move_next_long_word_end, "Move to end of next long word", move_prev_long_word_end, "Move to end of previous long word", move_parent_node_end, "Move to end of the parent node", move_parent_node_start, "Move to beginning of the parent node", extend_next_word_start, "Extend to start of next word", extend_prev_word_start, "Extend to start of previous word", extend_next_word_end, "Extend to end of next word", extend_prev_word_end, "Extend to end of previous word", extend_next_long_word_start, "Extend to start of next long word", extend_prev_long_word_start, "Extend to start of previous long word", extend_next_long_word_end, "Extend to end of next long word", extend_prev_long_word_end, "Extend to end of prev long word", extend_parent_node_end, "Extend to end of the parent node", extend_parent_node_start, "Extend to beginning of the parent node", find_till_char, "Move till next occurrence of char", find_next_char, "Move to next occurrence of char", extend_till_char, "Extend till next occurrence of char", extend_next_char, "Extend to next occurrence of char", till_prev_char, "Move till previous occurrence of char", find_prev_char, "Move to previous occurrence of char", extend_till_prev_char, "Extend till previous occurrence of char", extend_prev_char, "Extend to previous occurrence of char", repeat_last_motion, "Repeat last motion", replace, "Replace with new char", switch_case, "Switch (toggle) case", switch_to_uppercase, "Switch to uppercase", switch_to_lowercase, "Switch to lowercase", page_up, "Move page up", page_down, "Move page down", half_page_up, "Move half page up", half_page_down, "Move half page down", page_cursor_up, "Move page and cursor up", page_cursor_down, "Move page and cursor down", page_cursor_half_up, "Move page and cursor half up", page_cursor_half_down, "Move page and cursor half down", select_all, "Select whole document", select_regex, "Select all regex matches inside selections", split_selection, "Split selections on regex matches", split_selection_on_newline, "Split selection on newlines", merge_selections, "Merge selections", merge_consecutive_selections, "Merge consecutive selections", search, "Search for regex pattern", rsearch, "Reverse search for regex pattern", search_next, "Select next search match", search_prev, "Select previous search match", extend_search_next, "Add next search match to selection", extend_search_prev, "Add previous search match to selection", search_selection, "Use current selection as search pattern", make_search_word_bounded, "Modify current search to make it word bounded", global_search, "Global search in workspace folder", extend_line, "Select current line, if already selected, extend to another line based on the anchor", extend_line_below, "Select current line, if already selected, extend to next line", extend_line_above, "Select current line, if already selected, extend to previous line", select_line_above, "Select current line, if already selected, extend or shrink line above based on the anchor", select_line_below, "Select current line, if already selected, extend or shrink line below based on the anchor", extend_to_line_bounds, "Extend selection to line bounds", shrink_to_line_bounds, "Shrink selection to line bounds", delete_selection, "Delete selection", delete_selection_noyank, "Delete selection without yanking", change_selection, "Change selection", change_selection_noyank, "Change selection without yanking", collapse_selection, "Collapse selection into single cursor", flip_selections, "Flip selection cursor and anchor", ensure_selections_forward, "Ensure all selections face forward", insert_mode, "Insert before selection", append_mode, "Append after selection", command_mode, "Enter command mode", file_picker, "Open file picker", file_picker_in_current_buffer_directory, "Open file picker at current buffers's directory", file_picker_in_current_directory, "Open file picker at current working directory", code_action, "Perform code action", buffer_picker, "Open buffer picker", jumplist_picker, "Open jumplist picker", symbol_picker, "Open symbol picker", select_references_to_symbol_under_cursor, "Select symbol references", workspace_symbol_picker, "Open workspace symbol picker", diagnostics_picker, "Open diagnostic picker", workspace_diagnostics_picker, "Open workspace diagnostic picker", last_picker, "Open last picker", insert_at_line_start, "Insert at start of line", insert_at_line_end, "Insert at end of line", open_below, "Open new line below selection", open_above, "Open new line above selection", normal_mode, "Enter normal mode", select_mode, "Enter selection extend mode", exit_select_mode, "Exit selection mode", goto_definition, "Goto definition", goto_declaration, "Goto declaration", add_newline_above, "Add newline above", add_newline_below, "Add newline below", move_selection_above, "Move current line selection up", move_selection_below, "Move current line selection down", goto_type_definition, "Goto type definition", goto_implementation, "Goto implementation", goto_file_start, "Goto line number else file start", goto_file_end, "Goto file end", goto_file, "Goto files/URLs in selections", goto_file_hsplit, "Goto files in selections (hsplit)", goto_file_vsplit, "Goto files in selections (vsplit)", goto_reference, "Goto references", goto_window_top, "Goto window top", goto_window_center, "Goto window center", goto_window_bottom, "Goto window bottom", goto_last_accessed_file, "Goto last accessed file", goto_last_modified_file, "Goto last modified file", goto_last_modification, "Goto last modification", goto_line, "Goto line", goto_last_line, "Goto last line", goto_first_diag, "Goto first diagnostic", goto_last_diag, "Goto last diagnostic", goto_next_diag, "Goto next diagnostic", goto_prev_diag, "Goto previous diagnostic", goto_next_change, "Goto next change", goto_prev_change, "Goto previous change", goto_first_change, "Goto first change", goto_last_change, "Goto last change", goto_line_start, "Goto line start", goto_line_end, "Goto line end", goto_next_buffer, "Goto next buffer", goto_previous_buffer, "Goto previous buffer", goto_line_end_newline, "Goto newline at line end", goto_first_nonwhitespace, "Goto first non-blank in line", trim_selections, "Trim whitespace from selections", extend_to_line_start, "Extend to line start", extend_to_first_nonwhitespace, "Extend to first non-blank in line", extend_to_line_end, "Extend to line end", extend_to_line_end_newline, "Extend to line end", signature_help, "Show signature help", smart_tab, "Insert tab if all cursors have all whitespace to their left; otherwise, run a separate command.", insert_tab, "Insert tab char", insert_newline, "Insert newline char", delete_char_backward, "Delete previous char", delete_char_forward, "Delete next char", delete_word_backward, "Delete previous word", delete_word_forward, "Delete next word", kill_to_line_start, "Delete till start of line", kill_to_line_end, "Delete till end of line", undo, "Undo change", redo, "Redo change", earlier, "Move backward in history", later, "Move forward in history", commit_undo_checkpoint, "Commit changes to new checkpoint", yank, "Yank selection", yank_to_clipboard, "Yank selections to clipboard", yank_to_primary_clipboard, "Yank selections to primary clipboard", yank_joined, "Join and yank selections", yank_joined_to_clipboard, "Join and yank selections to clipboard", yank_main_selection_to_clipboard, "Yank main selection to clipboard", yank_joined_to_primary_clipboard, "Join and yank selections to primary clipboard", yank_main_selection_to_primary_clipboard, "Yank main selection to primary clipboard", replace_with_yanked, "Replace with yanked text", replace_selections_with_clipboard, "Replace selections by clipboard content", replace_selections_with_primary_clipboard, "Replace selections by primary clipboard", paste_after, "Paste after selection", paste_before, "Paste before selection", paste_clipboard_after, "Paste clipboard after selections", paste_clipboard_before, "Paste clipboard before selections", paste_primary_clipboard_after, "Paste primary clipboard after selections", paste_primary_clipboard_before, "Paste primary clipboard before selections", indent, "Indent selection", unindent, "Unindent selection", format_selections, "Format selection", join_selections, "Join lines inside selection", join_selections_space, "Join lines inside selection and select spaces", keep_selections, "Keep selections matching regex", remove_selections, "Remove selections matching regex", align_selections, "Align selections in column", keep_primary_selection, "Keep primary selection", remove_primary_selection, "Remove primary selection", completion, "Invoke completion popup", hover, "Show docs for item under cursor", toggle_comments, "Comment/uncomment selections", toggle_line_comments, "Line comment/uncomment selections", toggle_block_comments, "Block comment/uncomment selections", rotate_selections_forward, "Rotate selections forward", rotate_selections_backward, "Rotate selections backward", rotate_selection_contents_forward, "Rotate selection contents forward", rotate_selection_contents_backward, "Rotate selections contents backward", reverse_selection_contents, "Reverse selections contents", expand_selection, "Expand selection to parent syntax node", shrink_selection, "Shrink selection to previously expanded syntax node", select_next_sibling, "Select next sibling in syntax tree", select_prev_sibling, "Select previous sibling in syntax tree", jump_forward, "Jump forward on jumplist", jump_backward, "Jump backward on jumplist", save_selection, "Save current selection to jumplist", jump_view_right, "Jump to right split", jump_view_left, "Jump to left split", jump_view_up, "Jump to split above", jump_view_down, "Jump to split below", swap_view_right, "Swap with right split", swap_view_left, "Swap with left split", swap_view_up, "Swap with split above", swap_view_down, "Swap with split below", transpose_view, "Transpose splits", rotate_view, "Goto next window", rotate_view_reverse, "Goto previous window", hsplit, "Horizontal bottom split", hsplit_new, "Horizontal bottom split scratch buffer", vsplit, "Vertical right split", vsplit_new, "Vertical right split scratch buffer", wclose, "Close window", wonly, "Close windows except current", select_register, "Select register", insert_register, "Insert register", align_view_middle, "Align view middle", align_view_top, "Align view top", align_view_center, "Align view center", align_view_bottom, "Align view bottom", scroll_up, "Scroll view up", scroll_down, "Scroll view down", match_brackets, "Goto matching bracket", surround_add, "Surround add", surround_replace, "Surround replace", surround_delete, "Surround delete", select_textobject_around, "Select around object", select_textobject_inner, "Select inside object", goto_next_function, "Goto next function", goto_prev_function, "Goto previous function", goto_next_class, "Goto next type definition", goto_prev_class, "Goto previous type definition", goto_next_parameter, "Goto next parameter", goto_prev_parameter, "Goto previous parameter", goto_next_comment, "Goto next comment", goto_prev_comment, "Goto previous comment", goto_next_test, "Goto next test", goto_prev_test, "Goto previous test", goto_next_paragraph, "Goto next paragraph", goto_prev_paragraph, "Goto previous paragraph", dap_launch, "Launch debug target", dap_restart, "Restart debugging session", dap_toggle_breakpoint, "Toggle breakpoint", dap_continue, "Continue program execution", dap_pause, "Pause program execution", dap_step_in, "Step in", dap_step_out, "Step out", dap_next, "Step to next", dap_variables, "List variables", dap_terminate, "End debug session", dap_edit_condition, "Edit breakpoint condition on current line", dap_edit_log, "Edit breakpoint log message on current line", dap_switch_thread, "Switch current thread", dap_switch_stack_frame, "Switch stack frame", dap_enable_exceptions, "Enable exception breakpoints", dap_disable_exceptions, "Disable exception breakpoints", shell_pipe, "Pipe selections through shell command", shell_pipe_to, "Pipe selections into shell command ignoring output", shell_insert_output, "Insert shell command output before selections", shell_append_output, "Append shell command output after selections", shell_keep_pipe, "Filter selections with shell predicate", suspend, "Suspend and return to shell", rename_symbol, "Rename symbol", increment, "Increment item under cursor", decrement, "Decrement item under cursor", record_macro, "Record macro", replay_macro, "Replay macro", command_palette, "Open command palette", goto_word, "Jump to a two-character label", extend_to_word, "Extend to a two-character label", open_or_focus_explorer, "Open or focus explorer", reveal_current_file, "Reveal current file in explorer", insert_digraph, "Insert Unicode characters with prompt", ); } impl fmt::Debug for MappableCommand { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { match self { MappableCommand::Static { name, .. } => { f.debug_tuple("MappableCommand").field(name).finish() } MappableCommand::Typable { name, args, .. } => f .debug_tuple("MappableCommand") .field(name) .field(args) .finish(), } } } impl fmt::Display for MappableCommand { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { f.write_str(self.name()) } } impl std::str::FromStr for MappableCommand { type Err = anyhow::Error; fn from_str(s: &str) -> Result { if let Some(suffix) = s.strip_prefix(':') { let mut typable_command = suffix.split(' ').map(|arg| arg.trim()); let name = typable_command .next() .ok_or_else(|| anyhow!("Expected typable command name"))?; let args = typable_command .map(|s| s.to_owned()) .collect::>(); typed::TYPABLE_COMMAND_MAP .get(name) .map(|cmd| MappableCommand::Typable { name: cmd.name.to_owned(), doc: format!(":{} {:?}", cmd.name, args), args, }) .ok_or_else(|| anyhow!("No TypableCommand named '{}'", s)) } else { MappableCommand::STATIC_COMMAND_LIST .iter() .find(|cmd| cmd.name() == s) .cloned() .ok_or_else(|| anyhow!("No command named '{}'", s)) } } } impl<'de> Deserialize<'de> for MappableCommand { fn deserialize(deserializer: D) -> Result where D: Deserializer<'de>, { let s = String::deserialize(deserializer)?; s.parse().map_err(de::Error::custom) } } impl PartialEq for MappableCommand { fn eq(&self, other: &Self) -> bool { match (self, other) { ( MappableCommand::Typable { name: first_name, args: first_args, .. }, MappableCommand::Typable { name: second_name, args: second_args, .. }, ) => first_name == second_name && first_args == second_args, ( MappableCommand::Static { name: first_name, .. }, MappableCommand::Static { name: second_name, .. }, ) => first_name == second_name, _ => false, } } } fn no_op(_cx: &mut Context) {} type MoveFn = fn(RopeSlice, Range, Direction, usize, Movement, &TextFormat, &mut TextAnnotations) -> Range; fn move_impl(cx: &mut Context, move_fn: MoveFn, dir: Direction, behaviour: Movement) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let text_fmt = doc.text_format(view.inner_area(doc).width, None); let mut annotations = view.text_annotations(doc, None); let selection = doc.selection(view.id).clone().transform(|range| { move_fn( text, range, dir, count, behaviour, &text_fmt, &mut annotations, ) }); drop(annotations); doc.set_selection(view.id, selection); } use helix_core::movement::{move_horizontally, move_vertically}; fn move_char_left(cx: &mut Context) { move_impl(cx, move_horizontally, Direction::Backward, Movement::Move) } fn move_char_right(cx: &mut Context) { move_impl(cx, move_horizontally, Direction::Forward, Movement::Move) } fn move_line_up(cx: &mut Context) { move_impl(cx, move_vertically, Direction::Backward, Movement::Move) } fn move_line_down(cx: &mut Context) { move_impl(cx, move_vertically, Direction::Forward, Movement::Move) } fn move_visual_line_up(cx: &mut Context) { move_impl( cx, move_vertically_visual, Direction::Backward, Movement::Move, ) } fn move_visual_line_down(cx: &mut Context) { move_impl( cx, move_vertically_visual, Direction::Forward, Movement::Move, ) } fn extend_char_left(cx: &mut Context) { move_impl(cx, move_horizontally, Direction::Backward, Movement::Extend) } fn extend_char_right(cx: &mut Context) { move_impl(cx, move_horizontally, Direction::Forward, Movement::Extend) } fn extend_line_up(cx: &mut Context) { move_impl(cx, move_vertically, Direction::Backward, Movement::Extend) } fn extend_line_down(cx: &mut Context) { move_impl(cx, move_vertically, Direction::Forward, Movement::Extend) } fn extend_visual_line_up(cx: &mut Context) { move_impl( cx, move_vertically_visual, Direction::Backward, Movement::Extend, ) } fn extend_visual_line_down(cx: &mut Context) { move_impl( cx, move_vertically_visual, Direction::Forward, Movement::Extend, ) } fn goto_line_end_impl(view: &mut View, doc: &mut Document, movement: Movement) { let text = doc.text().slice(..); let selection = doc.selection(view.id).clone().transform(|range| { let line = range.cursor_line(text); let line_start = text.line_to_char(line); let pos = graphemes::prev_grapheme_boundary(text, line_end_char_index(&text, line)) .max(line_start); range.put_cursor(text, pos, movement == Movement::Extend) }); doc.set_selection(view.id, selection); } fn goto_line_end(cx: &mut Context) { let (view, doc) = current!(cx.editor); goto_line_end_impl( view, doc, if cx.editor.mode == Mode::Select { Movement::Extend } else { Movement::Move }, ) } fn extend_to_line_end(cx: &mut Context) { let (view, doc) = current!(cx.editor); goto_line_end_impl(view, doc, Movement::Extend) } fn goto_line_end_newline_impl(view: &mut View, doc: &mut Document, movement: Movement) { let text = doc.text().slice(..); let selection = doc.selection(view.id).clone().transform(|range| { let line = range.cursor_line(text); let pos = line_end_char_index(&text, line); range.put_cursor(text, pos, movement == Movement::Extend) }); doc.set_selection(view.id, selection); } fn goto_line_end_newline(cx: &mut Context) { let (view, doc) = current!(cx.editor); goto_line_end_newline_impl( view, doc, if cx.editor.mode == Mode::Select { Movement::Extend } else { Movement::Move }, ) } fn extend_to_line_end_newline(cx: &mut Context) { let (view, doc) = current!(cx.editor); goto_line_end_newline_impl(view, doc, Movement::Extend) } fn goto_line_start_impl(view: &mut View, doc: &mut Document, movement: Movement) { let text = doc.text().slice(..); let selection = doc.selection(view.id).clone().transform(|range| { let line = range.cursor_line(text); // adjust to start of the line let pos = text.line_to_char(line); range.put_cursor(text, pos, movement == Movement::Extend) }); doc.set_selection(view.id, selection); } fn goto_line_start(cx: &mut Context) { let (view, doc) = current!(cx.editor); goto_line_start_impl( view, doc, if cx.editor.mode == Mode::Select { Movement::Extend } else { Movement::Move }, ) } fn goto_next_buffer(cx: &mut Context) { goto_buffer(cx.editor, Direction::Forward); } fn goto_previous_buffer(cx: &mut Context) { goto_buffer(cx.editor, Direction::Backward); } fn goto_buffer(editor: &mut Editor, direction: Direction) { let current = view!(editor).doc; let id = match direction { Direction::Forward => { let iter = editor.documents.keys(); let mut iter = iter.skip_while(|id| *id != ¤t); iter.next(); // skip current item iter.next().or_else(|| editor.documents.keys().next()) } Direction::Backward => { let iter = editor.documents.keys(); let mut iter = iter.rev().skip_while(|id| *id != ¤t); iter.next(); // skip current item iter.next().or_else(|| editor.documents.keys().next_back()) } } .unwrap(); let id = *id; editor.switch(id, Action::Replace); } fn extend_to_line_start(cx: &mut Context) { let (view, doc) = current!(cx.editor); goto_line_start_impl(view, doc, Movement::Extend) } fn kill_to_line_start(cx: &mut Context) { delete_by_selection_insert_mode( cx, move |text, range| { let line = range.cursor_line(text); let first_char = text.line_to_char(line); let anchor = range.cursor(text); let head = if anchor == first_char && line != 0 { // select until previous line line_end_char_index(&text, line - 1) } else if let Some(pos) = text.line(line).first_non_whitespace_char() { if first_char + pos < anchor { // select until first non-blank in line if cursor is after it first_char + pos } else { // select until start of line first_char } } else { // select until start of line first_char }; (head, anchor) }, Direction::Backward, ); } fn kill_to_line_end(cx: &mut Context) { delete_by_selection_insert_mode( cx, |text, range| { let line = range.cursor_line(text); let line_end_pos = line_end_char_index(&text, line); let pos = range.cursor(text); // if the cursor is on the newline char delete that if pos == line_end_pos { (pos, text.line_to_char(line + 1)) } else { (pos, line_end_pos) } }, Direction::Forward, ); } fn goto_first_nonwhitespace(cx: &mut Context) { let (view, doc) = current!(cx.editor); goto_first_nonwhitespace_impl( view, doc, if cx.editor.mode == Mode::Select { Movement::Extend } else { Movement::Move }, ) } fn extend_to_first_nonwhitespace(cx: &mut Context) { let (view, doc) = current!(cx.editor); goto_first_nonwhitespace_impl(view, doc, Movement::Extend) } fn goto_first_nonwhitespace_impl(view: &mut View, doc: &mut Document, movement: Movement) { let text = doc.text().slice(..); let selection = doc.selection(view.id).clone().transform(|range| { let line = range.cursor_line(text); if let Some(pos) = text.line(line).first_non_whitespace_char() { let pos = pos + text.line_to_char(line); range.put_cursor(text, pos, movement == Movement::Extend) } else { range } }); doc.set_selection(view.id, selection); } fn trim_selections(cx: &mut Context) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let ranges: SmallVec<[Range; 1]> = doc .selection(view.id) .iter() .filter_map(|range| { if range.is_empty() || range.slice(text).chars().all(|ch| ch.is_whitespace()) { return None; } let mut start = range.from(); let mut end = range.to(); start = movement::skip_while(text, start, |x| x.is_whitespace()).unwrap_or(start); end = movement::backwards_skip_while(text, end, |x| x.is_whitespace()).unwrap_or(end); Some(Range::new(start, end).with_direction(range.direction())) }) .collect(); if !ranges.is_empty() { let primary = doc.selection(view.id).primary(); let idx = ranges .iter() .position(|range| range.overlaps(&primary)) .unwrap_or(ranges.len() - 1); doc.set_selection(view.id, Selection::new(ranges, idx)); } else { collapse_selection(cx); keep_primary_selection(cx); }; } // align text in selection #[allow(deprecated)] fn align_selections(cx: &mut Context) { use helix_core::visual_coords_at_pos; let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id); let tab_width = doc.tab_width(); let mut column_widths: Vec> = Vec::new(); let mut last_line = text.len_lines() + 1; let mut col = 0; for range in selection { let coords = visual_coords_at_pos(text, range.head, tab_width); let anchor_coords = visual_coords_at_pos(text, range.anchor, tab_width); if coords.row != anchor_coords.row { cx.editor .set_error("align cannot work with multi line selections"); return; } col = if coords.row == last_line { col + 1 } else { 0 }; if col >= column_widths.len() { column_widths.push(Vec::new()); } column_widths[col].push((range.from(), coords.col)); last_line = coords.row; } let mut changes = Vec::with_capacity(selection.len()); // Account for changes on each row let len = column_widths.first().map(|cols| cols.len()).unwrap_or(0); let mut offs = vec![0; len]; for col in column_widths { let max_col = col .iter() .enumerate() .map(|(row, (_, cursor))| *cursor + offs[row]) .max() .unwrap_or(0); for (row, (insert_pos, last_col)) in col.into_iter().enumerate() { let ins_count = max_col - (last_col + offs[row]); if ins_count == 0 { continue; } offs[row] += ins_count; changes.push((insert_pos, insert_pos, Some(" ".repeat(ins_count).into()))); } } // The changeset has to be sorted changes.sort_unstable_by_key(|(from, _, _)| *from); let transaction = Transaction::change(doc.text(), changes.into_iter()); doc.apply(&transaction, view.id); exit_select_mode(cx); } fn goto_window(cx: &mut Context, align: Align) { let count = cx.count() - 1; let config = cx.editor.config(); let (view, doc) = current!(cx.editor); let height = view.inner_height(); // respect user given count if any // - 1 so we have at least one gap in the middle. // a height of 6 with padding of 3 on each side will keep shifting the view back and forth // as we type let scrolloff = config.scrolloff.min(height.saturating_sub(1) / 2); let last_visual_line = view.last_visual_line(doc); let visual_line = match align { Align::Top => view.offset.vertical_offset + scrolloff + count, Align::Center => view.offset.vertical_offset + (last_visual_line / 2), Align::Bottom => { view.offset.vertical_offset + last_visual_line.saturating_sub(scrolloff + count) } }; let visual_line = visual_line .max(view.offset.vertical_offset + scrolloff) .min(view.offset.vertical_offset + last_visual_line.saturating_sub(scrolloff)); let pos = view .pos_at_visual_coords(doc, visual_line as u16, 0, false) .expect("visual_line was constrained to the view area"); let text = doc.text().slice(..); let selection = doc .selection(view.id) .clone() .transform(|range| range.put_cursor(text, pos, cx.editor.mode == Mode::Select)); doc.set_selection(view.id, selection); } fn goto_window_top(cx: &mut Context) { goto_window(cx, Align::Top) } fn goto_window_center(cx: &mut Context) { goto_window(cx, Align::Center) } fn goto_window_bottom(cx: &mut Context) { goto_window(cx, Align::Bottom) } fn move_word_impl(cx: &mut Context, move_fn: F) where F: Fn(RopeSlice, Range, usize) -> Range, { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc .selection(view.id) .clone() .transform(|range| move_fn(text, range, count)); doc.set_selection(view.id, selection); } fn move_next_word_start(cx: &mut Context) { move_word_impl(cx, movement::move_next_word_start) } fn move_prev_word_start(cx: &mut Context) { move_word_impl(cx, movement::move_prev_word_start) } fn move_prev_word_end(cx: &mut Context) { move_word_impl(cx, movement::move_prev_word_end) } fn move_next_word_end(cx: &mut Context) { move_word_impl(cx, movement::move_next_word_end) } fn move_next_long_word_start(cx: &mut Context) { move_word_impl(cx, movement::move_next_long_word_start) } fn move_prev_long_word_start(cx: &mut Context) { move_word_impl(cx, movement::move_prev_long_word_start) } fn move_prev_long_word_end(cx: &mut Context) { move_word_impl(cx, movement::move_prev_long_word_end) } fn move_next_long_word_end(cx: &mut Context) { move_word_impl(cx, movement::move_next_long_word_end) } fn goto_para_impl(cx: &mut Context, move_fn: F) where F: Fn(RopeSlice, Range, usize, Movement) -> Range + 'static, { let count = cx.count(); let motion = move |editor: &mut Editor| { let (view, doc) = current!(editor); let text = doc.text().slice(..); let behavior = if editor.mode == Mode::Select { Movement::Extend } else { Movement::Move }; let selection = doc .selection(view.id) .clone() .transform(|range| move_fn(text, range, count, behavior)); doc.set_selection(view.id, selection); }; cx.editor.apply_motion(motion) } fn goto_prev_paragraph(cx: &mut Context) { goto_para_impl(cx, movement::move_prev_paragraph) } fn goto_next_paragraph(cx: &mut Context) { goto_para_impl(cx, movement::move_next_paragraph) } fn goto_file_start(cx: &mut Context) { if cx.count.is_some() { goto_line(cx); } else { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc .selection(view.id) .clone() .transform(|range| range.put_cursor(text, 0, cx.editor.mode == Mode::Select)); push_jump(view, doc); doc.set_selection(view.id, selection); } } fn goto_file_end(cx: &mut Context) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let pos = doc.text().len_chars(); let selection = doc .selection(view.id) .clone() .transform(|range| range.put_cursor(text, pos, cx.editor.mode == Mode::Select)); push_jump(view, doc); doc.set_selection(view.id, selection); } fn goto_file(cx: &mut Context) { goto_file_impl(cx, Action::Replace); } fn goto_file_hsplit(cx: &mut Context) { goto_file_impl(cx, Action::HorizontalSplit); } fn goto_file_vsplit(cx: &mut Context) { goto_file_impl(cx, Action::VerticalSplit); } /// Goto files in selection. fn goto_file_impl(cx: &mut Context, action: Action) { let (view, doc) = current_ref!(cx.editor); let text = doc.text(); let selections = doc.selection(view.id); let rel_path = doc .relative_path() .map(|path| path.parent().unwrap().to_path_buf()) .unwrap_or_default(); let mut paths: Vec<_> = selections .iter() .map(|r| text.slice(r.from()..r.to()).to_string()) .collect(); let primary = selections.primary(); // Checks whether there is only one selection with a width of 1 if selections.len() == 1 && primary.len() == 1 { let count = cx.count(); let text_slice = text.slice(..); // In this case it selects the WORD under the cursor let current_word = textobject::textobject_word( text_slice, primary, textobject::TextObject::Inside, count, true, ); // Trims some surrounding chars so that the actual file is opened. let surrounding_chars: &[_] = &['\'', '"', '(', ')']; paths.clear(); paths.push( current_word .fragment(text_slice) .trim_matches(surrounding_chars) .to_string(), ); } for sel in paths { let p = sel.trim(); if p.is_empty() { continue; } if let Ok(url) = Url::parse(p) { return open_url(cx, url, action); } let path = &rel_path.join(p); if path.is_dir() { let picker = ui::file_picker(path.into(), &cx.editor.config()); cx.push_layer(Box::new(overlaid(picker))); } else if let Err(e) = cx.editor.open(path, action) { cx.editor.set_error(format!("Open file failed: {:?}", e)); } } } /// Opens the given url. If the URL points to a valid textual file it is open in helix. // Otherwise, the file is open using external program. fn open_url(cx: &mut Context, url: Url, action: Action) { let doc = doc!(cx.editor); let rel_path = doc .relative_path() .map(|path| path.parent().unwrap().to_path_buf()) .unwrap_or_default(); if url.scheme() != "file" { return cx.jobs.callback(crate::open_external_url_callback(url)); } let content_type = std::fs::File::open(url.path()).and_then(|file| { // Read up to 1kb to detect the content type let mut read_buffer = Vec::new(); let n = file.take(1024).read_to_end(&mut read_buffer)?; Ok(content_inspector::inspect(&read_buffer[..n])) }); // we attempt to open binary files - files that can't be open in helix - using external // program as well, e.g. pdf files or images match content_type { Ok(content_inspector::ContentType::BINARY) => { cx.jobs.callback(crate::open_external_url_callback(url)) } Ok(_) | Err(_) => { let path = &rel_path.join(url.path()); if path.is_dir() { let picker = ui::file_picker(path.into(), &cx.editor.config()); cx.push_layer(Box::new(overlaid(picker))); } else if let Err(e) = cx.editor.open(path, action) { cx.editor.set_error(format!("Open file failed: {:?}", e)); } } } } fn extend_word_impl(cx: &mut Context, extend_fn: F) where F: Fn(RopeSlice, Range, usize) -> Range, { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).clone().transform(|range| { let word = extend_fn(text, range, count); let pos = word.cursor(text); range.put_cursor(text, pos, true) }); doc.set_selection(view.id, selection); } fn extend_next_word_start(cx: &mut Context) { extend_word_impl(cx, movement::move_next_word_start) } fn extend_prev_word_start(cx: &mut Context) { extend_word_impl(cx, movement::move_prev_word_start) } fn extend_next_word_end(cx: &mut Context) { extend_word_impl(cx, movement::move_next_word_end) } fn extend_prev_word_end(cx: &mut Context) { extend_word_impl(cx, movement::move_prev_word_end) } fn extend_next_long_word_start(cx: &mut Context) { extend_word_impl(cx, movement::move_next_long_word_start) } fn extend_prev_long_word_start(cx: &mut Context) { extend_word_impl(cx, movement::move_prev_long_word_start) } fn extend_prev_long_word_end(cx: &mut Context) { extend_word_impl(cx, movement::move_prev_long_word_end) } fn extend_next_long_word_end(cx: &mut Context) { extend_word_impl(cx, movement::move_next_long_word_end) } /// Separate branch to find_char designed only for `` char. // // This is necessary because the one document can have different line endings inside. And we // cannot predict what character to find when is pressed. On the current line it can be `lf` // but on the next line it can be `crlf`. That's why [`find_char_impl`] cannot be applied here. fn find_char_line_ending( cx: &mut Context, count: usize, direction: Direction, inclusive: bool, extend: bool, ) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).clone().transform(|range| { let cursor = range.cursor(text); let cursor_line = range.cursor_line(text); // Finding the line where we're going to find . Depends mostly on // `count`, but also takes into account edge cases where we're already at the end // of a line or the beginning of a line let find_on_line = match direction { Direction::Forward => { let on_edge = line_end_char_index(&text, cursor_line) == cursor; let line = cursor_line + count - 1 + (on_edge as usize); if line >= text.len_lines() - 1 { return range; } else { line } } Direction::Backward => { let on_edge = text.line_to_char(cursor_line) == cursor && !inclusive; let line = cursor_line as isize - (count as isize - 1 + on_edge as isize); if line <= 0 { return range; } else { line as usize } } }; let pos = match (direction, inclusive) { (Direction::Forward, true) => line_end_char_index(&text, find_on_line), (Direction::Forward, false) => line_end_char_index(&text, find_on_line) - 1, (Direction::Backward, true) => line_end_char_index(&text, find_on_line - 1), (Direction::Backward, false) => text.line_to_char(find_on_line), }; if extend { range.put_cursor(text, pos, true) } else { Range::point(range.cursor(text)).put_cursor(text, pos, true) } }); doc.set_selection(view.id, selection); } fn find_char(cx: &mut Context, direction: Direction, inclusive: bool, extend: bool) { // TODO: count is reset to 1 before next key so we move it into the closure here. // Would be nice to carry over. let count = cx.count(); // need to wait for next key // TODO: should this be done by grapheme rather than char? For example, // we can't properly handle the line-ending CRLF case here in terms of char. cx.on_next_key(move |cx, event| { let ch = match event { KeyEvent { code: KeyCode::Enter, .. } => { find_char_line_ending(cx, count, direction, inclusive, extend); return; } KeyEvent { code: KeyCode::Tab, .. } => '\t', KeyEvent { code: KeyCode::Char(ch), .. } => ch, _ => return, }; let motion = move |editor: &mut Editor| { match direction { Direction::Forward => { find_char_impl(editor, &find_next_char_impl, inclusive, extend, ch, count) } Direction::Backward => { find_char_impl(editor, &find_prev_char_impl, inclusive, extend, ch, count) } }; }; cx.editor.apply_motion(motion); }) } // #[inline] fn find_char_impl( editor: &mut Editor, search_fn: &F, inclusive: bool, extend: bool, char_matcher: M, count: usize, ) where F: Fn(RopeSlice, M, usize, usize, bool) -> Option + 'static, { let (view, doc) = current!(editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).clone().transform(|range| { // TODO: use `Range::cursor()` here instead. However, that works in terms of // graphemes, whereas this function doesn't yet. So we're doing the same logic // here, but just in terms of chars instead. let search_start_pos = if range.anchor < range.head { range.head - 1 } else { range.head }; search_fn(text, char_matcher, search_start_pos, count, inclusive).map_or(range, |pos| { if extend { range.put_cursor(text, pos, true) } else { Range::point(range.cursor(text)).put_cursor(text, pos, true) } }) }); doc.set_selection(view.id, selection); } fn find_next_char_impl( text: RopeSlice, ch: char, pos: usize, n: usize, inclusive: bool, ) -> Option { let pos = (pos + 1).min(text.len_chars()); if inclusive { search::find_nth_next(text, ch, pos, n) } else { let n = match text.get_char(pos) { Some(next_ch) if next_ch == ch => n + 1, _ => n, }; search::find_nth_next(text, ch, pos, n).map(|n| n.saturating_sub(1)) } } fn find_prev_char_impl( text: RopeSlice, ch: char, pos: usize, n: usize, inclusive: bool, ) -> Option { if inclusive { search::find_nth_prev(text, ch, pos, n) } else { let n = match text.get_char(pos.saturating_sub(1)) { Some(next_ch) if next_ch == ch => n + 1, _ => n, }; search::find_nth_prev(text, ch, pos, n).map(|n| (n + 1).min(text.len_chars())) } } fn find_till_char(cx: &mut Context) { find_char(cx, Direction::Forward, false, false); } fn find_next_char(cx: &mut Context) { find_char(cx, Direction::Forward, true, false) } fn extend_till_char(cx: &mut Context) { find_char(cx, Direction::Forward, false, true) } fn extend_next_char(cx: &mut Context) { find_char(cx, Direction::Forward, true, true) } fn till_prev_char(cx: &mut Context) { find_char(cx, Direction::Backward, false, false) } fn find_prev_char(cx: &mut Context) { find_char(cx, Direction::Backward, true, false) } fn extend_till_prev_char(cx: &mut Context) { find_char(cx, Direction::Backward, false, true) } fn extend_prev_char(cx: &mut Context) { find_char(cx, Direction::Backward, true, true) } fn repeat_last_motion(cx: &mut Context) { cx.editor.repeat_last_motion(cx.count()) } fn replace(cx: &mut Context) { let mut buf = [0u8; 4]; // To hold utf8 encoded char. // need to wait for next key cx.on_next_key(move |cx, event| { let (view, doc) = current!(cx.editor); let ch: Option<&str> = match event { KeyEvent { code: KeyCode::Char(ch), .. } => Some(ch.encode_utf8(&mut buf[..])), KeyEvent { code: KeyCode::Enter, .. } => Some(doc.line_ending.as_str()), KeyEvent { code: KeyCode::Tab, .. } => Some("\t"), _ => None, }; let selection = doc.selection(view.id); if let Some(ch) = ch { let transaction = Transaction::change_by_selection(doc.text(), selection, |range| { if !range.is_empty() { let text: String = RopeGraphemes::new(doc.text().slice(range.from()..range.to())) .map(|g| { let cow: Cow = g.into(); if str_is_line_ending(&cow) { cow } else { ch.into() } }) .collect(); (range.from(), range.to(), Some(text.into())) } else { // No change. (range.from(), range.to(), None) } }); doc.apply(&transaction, view.id); exit_select_mode(cx); } }) } fn switch_case_impl(cx: &mut Context, change_fn: F) where F: Fn(RopeSlice) -> Tendril, { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id); let transaction = Transaction::change_by_selection(doc.text(), selection, |range| { let text: Tendril = change_fn(range.slice(doc.text().slice(..))); (range.from(), range.to(), Some(text)) }); doc.apply(&transaction, view.id); exit_select_mode(cx); } fn switch_case(cx: &mut Context) { switch_case_impl(cx, |string| { string .chars() .flat_map(|ch| { if ch.is_lowercase() { ch.to_uppercase().collect() } else if ch.is_uppercase() { ch.to_lowercase().collect() } else { vec![ch] } }) .collect() }); } fn switch_to_uppercase(cx: &mut Context) { switch_case_impl(cx, |string| { string.chunks().map(|chunk| chunk.to_uppercase()).collect() }); } fn switch_to_lowercase(cx: &mut Context) { switch_case_impl(cx, |string| { string.chunks().map(|chunk| chunk.to_lowercase()).collect() }); } pub fn scroll(cx: &mut Context, offset: usize, direction: Direction, sync_cursor: bool) { use Direction::*; let config = cx.editor.config(); let (view, doc) = current!(cx.editor); let range = doc.selection(view.id).primary(); let text = doc.text().slice(..); let cursor = range.cursor(text); let height = view.inner_height(); let scrolloff = config.scrolloff.min(height.saturating_sub(1) / 2); let offset = match direction { Forward => offset as isize, Backward => -(offset as isize), }; let doc_text = doc.text().slice(..); let viewport = view.inner_area(doc); let text_fmt = doc.text_format(viewport.width, None); let mut annotations = view.text_annotations(&*doc, None); (view.offset.anchor, view.offset.vertical_offset) = char_idx_at_visual_offset( doc_text, view.offset.anchor, view.offset.vertical_offset as isize + offset, 0, &text_fmt, &annotations, ); if sync_cursor { let movement = match cx.editor.mode { Mode::Select => Movement::Extend, _ => Movement::Move, }; // TODO: When inline diagnostics gets merged- 1. move_vertically_visual removes // line annotations/diagnostics so the cursor may jump further than the view. // 2. If the cursor lands on a complete line of virtual text, the cursor will // jump a different distance than the view. let selection = doc.selection(view.id).clone().transform(|range| { move_vertically_visual( doc_text, range, direction, offset.unsigned_abs(), movement, &text_fmt, &mut annotations, ) }); doc.set_selection(view.id, selection); return; } let mut head; match direction { Forward => { let off; (head, off) = char_idx_at_visual_offset( doc_text, view.offset.anchor, (view.offset.vertical_offset + scrolloff) as isize, 0, &text_fmt, &annotations, ); head += (off != 0) as usize; if head <= cursor { return; } } Backward => { head = char_idx_at_visual_offset( doc_text, view.offset.anchor, (view.offset.vertical_offset + height - scrolloff - 1) as isize, 0, &text_fmt, &annotations, ) .0; if head >= cursor { return; } } } let anchor = if cx.editor.mode == Mode::Select { range.anchor } else { head }; // replace primary selection with an empty selection at cursor pos let prim_sel = Range::new(anchor, head); let mut sel = doc.selection(view.id).clone(); let idx = sel.primary_index(); sel = sel.replace(idx, prim_sel); drop(annotations); doc.set_selection(view.id, sel); } fn page_up(cx: &mut Context) { let view = view!(cx.editor); let offset = view.inner_height(); scroll(cx, offset, Direction::Backward, false); } fn page_down(cx: &mut Context) { let view = view!(cx.editor); let offset = view.inner_height(); scroll(cx, offset, Direction::Forward, false); } fn half_page_up(cx: &mut Context) { let view = view!(cx.editor); let offset = view.inner_height() / 2; scroll(cx, offset, Direction::Backward, false); } fn half_page_down(cx: &mut Context) { let view = view!(cx.editor); let offset = view.inner_height() / 2; scroll(cx, offset, Direction::Forward, false); } fn page_cursor_up(cx: &mut Context) { let view = view!(cx.editor); let offset = view.inner_height(); scroll(cx, offset, Direction::Backward, true); } fn page_cursor_down(cx: &mut Context) { let view = view!(cx.editor); let offset = view.inner_height(); scroll(cx, offset, Direction::Forward, true); } fn page_cursor_half_up(cx: &mut Context) { let view = view!(cx.editor); let offset = view.inner_height() / 2; scroll(cx, offset, Direction::Backward, true); } fn page_cursor_half_down(cx: &mut Context) { let view = view!(cx.editor); let offset = view.inner_height() / 2; scroll(cx, offset, Direction::Forward, true); } #[allow(deprecated)] // currently uses the deprecated `visual_coords_at_pos`/`pos_at_visual_coords` functions // as this function ignores softwrapping (and virtual text) and instead only cares // about "text visual position" // // TODO: implement a variant of that uses visual lines and respects virtual text fn copy_selection_on_line(cx: &mut Context, direction: Direction) { use helix_core::{pos_at_visual_coords, visual_coords_at_pos}; let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id); let mut ranges = SmallVec::with_capacity(selection.ranges().len() * (count + 1)); ranges.extend_from_slice(selection.ranges()); let mut primary_index = 0; for range in selection.iter() { let is_primary = *range == selection.primary(); // The range is always head exclusive let (head, anchor) = if range.anchor < range.head { (range.head - 1, range.anchor) } else { (range.head, range.anchor.saturating_sub(1)) }; let tab_width = doc.tab_width(); let head_pos = visual_coords_at_pos(text, head, tab_width); let anchor_pos = visual_coords_at_pos(text, anchor, tab_width); let height = std::cmp::max(head_pos.row, anchor_pos.row) - std::cmp::min(head_pos.row, anchor_pos.row) + 1; if is_primary { primary_index = ranges.len(); } ranges.push(*range); let mut sels = 0; let mut i = 0; while sels < count { let offset = (i + 1) * height; let anchor_row = match direction { Direction::Forward => anchor_pos.row + offset, Direction::Backward => anchor_pos.row.saturating_sub(offset), }; let head_row = match direction { Direction::Forward => head_pos.row + offset, Direction::Backward => head_pos.row.saturating_sub(offset), }; if anchor_row >= text.len_lines() || head_row >= text.len_lines() { break; } let anchor = pos_at_visual_coords(text, Position::new(anchor_row, anchor_pos.col), tab_width); let head = pos_at_visual_coords(text, Position::new(head_row, head_pos.col), tab_width); // skip lines that are too short if visual_coords_at_pos(text, anchor, tab_width).col == anchor_pos.col && visual_coords_at_pos(text, head, tab_width).col == head_pos.col { if is_primary { primary_index = ranges.len(); } // This is Range::new(anchor, head), but it will place the cursor on the correct column ranges.push(Range::point(anchor).put_cursor(text, head, true)); sels += 1; } if anchor_row == 0 && head_row == 0 { break; } i += 1; } } let selection = Selection::new(ranges, primary_index); doc.set_selection(view.id, selection); } fn copy_selection_on_prev_line(cx: &mut Context) { copy_selection_on_line(cx, Direction::Backward) } fn copy_selection_on_next_line(cx: &mut Context) { copy_selection_on_line(cx, Direction::Forward) } fn select_all(cx: &mut Context) { let (view, doc) = current!(cx.editor); let end = doc.text().len_chars(); doc.set_selection(view.id, Selection::single(0, end)) } fn select_regex(cx: &mut Context) { let reg = cx.register.unwrap_or('/'); ui::regex_prompt( cx, "select:".into(), Some(reg), ui::completers::none, move |cx, regex, event| { let (view, doc) = current!(cx.editor); if !matches!(event, PromptEvent::Update | PromptEvent::Validate) { return; } let text = doc.text().slice(..); if let Some(selection) = selection::select_on_matches(text, doc.selection(view.id), ®ex) { doc.set_selection(view.id, selection); } }, ); } fn split_selection(cx: &mut Context) { let reg = cx.register.unwrap_or('/'); ui::regex_prompt( cx, "split:".into(), Some(reg), ui::completers::none, move |cx, regex, event| { let (view, doc) = current!(cx.editor); if !matches!(event, PromptEvent::Update | PromptEvent::Validate) { return; } let text = doc.text().slice(..); let selection = selection::split_on_matches(text, doc.selection(view.id), ®ex); doc.set_selection(view.id, selection); }, ); } fn split_selection_on_newline(cx: &mut Context) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = selection::split_on_newline(text, doc.selection(view.id)); doc.set_selection(view.id, selection); } fn merge_selections(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id).clone().merge_ranges(); doc.set_selection(view.id, selection); } fn merge_consecutive_selections(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id).clone().merge_consecutive_ranges(); doc.set_selection(view.id, selection); } #[allow(clippy::too_many_arguments)] fn search_impl( editor: &mut Editor, regex: &rope::Regex, movement: Movement, direction: Direction, scrolloff: usize, wrap_around: bool, show_warnings: bool, ) { let (view, doc) = current!(editor); let text = doc.text().slice(..); let selection = doc.selection(view.id); // Get the right side of the primary block cursor for forward search, or the // grapheme before the start of the selection for reverse search. let start = match direction { Direction::Forward => text.char_to_byte(graphemes::ensure_grapheme_boundary_next( text, selection.primary().to(), )), Direction::Backward => text.char_to_byte(graphemes::ensure_grapheme_boundary_prev( text, selection.primary().from(), )), }; // A regex::Match returns byte-positions in the str. In the case where we // do a reverse search and wraparound to the end, we don't need to search // the text before the current cursor position for matches, but by slicing // it out, we need to add it back to the position of the selection. let doc = doc!(editor).text().slice(..); // use find_at to find the next match after the cursor, loop around the end // Careful, `Regex` uses `bytes` as offsets, not character indices! let mut mat = match direction { Direction::Forward => regex.find(doc.regex_input_at_bytes(start..)), Direction::Backward => regex.find_iter(doc.regex_input_at_bytes(..start)).last(), }; if mat.is_none() { if wrap_around { mat = match direction { Direction::Forward => regex.find(doc.regex_input()), Direction::Backward => regex.find_iter(doc.regex_input_at_bytes(start..)).last(), }; } if show_warnings { if wrap_around && mat.is_some() { editor.set_status("Wrapped around document"); } else { editor.set_error("No more matches"); } } } let (view, doc) = current!(editor); let text = doc.text().slice(..); let selection = doc.selection(view.id); if let Some(mat) = mat { let start = text.byte_to_char(mat.start()); let end = text.byte_to_char(mat.end()); if end == 0 { // skip empty matches that don't make sense return; } // Determine range direction based on the primary range let primary = selection.primary(); let range = Range::new(start, end).with_direction(primary.direction()); let selection = match movement { Movement::Extend => selection.clone().push(range), Movement::Move => selection.clone().replace(selection.primary_index(), range), }; doc.set_selection(view.id, selection); view.ensure_cursor_in_view_center(doc, scrolloff); }; } fn search_completions(cx: &mut Context, reg: Option) -> Vec { let mut items = reg .and_then(|reg| cx.editor.registers.read(reg, cx.editor)) .map_or(Vec::new(), |reg| reg.take(200).collect()); items.sort_unstable(); items.dedup(); items.into_iter().map(|value| value.to_string()).collect() } fn search(cx: &mut Context) { searcher(cx, Direction::Forward) } fn rsearch(cx: &mut Context) { searcher(cx, Direction::Backward) } fn searcher(cx: &mut Context, direction: Direction) { let reg = cx.register.unwrap_or('/'); let config = cx.editor.config(); let scrolloff = config.scrolloff; let wrap_around = config.search.wrap_around; // TODO: could probably share with select_on_matches? let completions = search_completions(cx, Some(reg)); ui::regex_prompt( cx, "search:".into(), Some(reg), move |_editor: &Editor, input: &str| { completions .iter() .filter(|comp| comp.starts_with(input)) .map(|comp| (0.., std::borrow::Cow::Owned(comp.clone()))) .collect() }, move |cx, regex, event| { if event == PromptEvent::Validate { cx.editor.registers.last_search_register = reg; } else if event != PromptEvent::Update { return; } search_impl( cx.editor, ®ex, Movement::Move, direction, scrolloff, wrap_around, false, ); }, ); } fn search_next_or_prev_impl(cx: &mut Context, movement: Movement, direction: Direction) { let count = cx.count(); let register = cx .register .unwrap_or(cx.editor.registers.last_search_register); let config = cx.editor.config(); let scrolloff = config.scrolloff; if let Some(query) = cx.editor.registers.first(register, cx.editor) { let search_config = &config.search; let case_insensitive = if search_config.smart_case { !query.chars().any(char::is_uppercase) } else { false }; let wrap_around = search_config.wrap_around; if let Ok(regex) = rope::RegexBuilder::new() .syntax( rope::Config::new() .case_insensitive(case_insensitive) .multi_line(true), ) .build(&query) { for _ in 0..count { search_impl( cx.editor, ®ex, movement, direction, scrolloff, wrap_around, true, ); } } else { let error = format!("Invalid regex: {}", query); cx.editor.set_error(error); } } } fn search_next(cx: &mut Context) { search_next_or_prev_impl(cx, Movement::Move, Direction::Forward); } fn search_prev(cx: &mut Context) { search_next_or_prev_impl(cx, Movement::Move, Direction::Backward); } fn extend_search_next(cx: &mut Context) { search_next_or_prev_impl(cx, Movement::Extend, Direction::Forward); } fn extend_search_prev(cx: &mut Context) { search_next_or_prev_impl(cx, Movement::Extend, Direction::Backward); } fn search_selection(cx: &mut Context) { let register = cx.register.unwrap_or('/'); let (view, doc) = current!(cx.editor); let contents = doc.text().slice(..); let regex = doc .selection(view.id) .iter() .map(|selection| regex::escape(&selection.fragment(contents))) .collect::>() // Collect into hashset to deduplicate identical regexes .into_iter() .collect::>() .join("|"); let msg = format!("register '{}' set to '{}'", register, ®ex); match cx.editor.registers.push(register, regex) { Ok(_) => { cx.editor.registers.last_search_register = register; cx.editor.set_status(msg) } Err(err) => cx.editor.set_error(err.to_string()), } } fn make_search_word_bounded(cx: &mut Context) { // Defaults to the active search register instead `/` to be more ergonomic assuming most people // would use this command following `search_selection`. This avoids selecting the register // twice. let register = cx .register .unwrap_or(cx.editor.registers.last_search_register); let regex = match cx.editor.registers.first(register, cx.editor) { Some(regex) => regex, None => return, }; let start_anchored = regex.starts_with("\\b"); let end_anchored = regex.ends_with("\\b"); if start_anchored && end_anchored { return; } let mut new_regex = String::with_capacity( regex.len() + if start_anchored { 0 } else { 2 } + if end_anchored { 0 } else { 2 }, ); if !start_anchored { new_regex.push_str("\\b"); } new_regex.push_str(®ex); if !end_anchored { new_regex.push_str("\\b"); } let msg = format!("register '{}' set to '{}'", register, &new_regex); match cx.editor.registers.push(register, new_regex) { Ok(_) => { cx.editor.registers.last_search_register = register; cx.editor.set_status(msg) } Err(err) => cx.editor.set_error(err.to_string()), } } fn global_search(cx: &mut Context) { #[derive(Debug)] struct FileResult { path: PathBuf, /// 0 indexed lines line_num: usize, } impl FileResult { fn new(path: &Path, line_num: usize) -> Self { Self { path: path.to_path_buf(), line_num, } } } impl ui::menu::Item for FileResult { type Data = Option; fn format(&self, current_path: &Self::Data) -> Row { let relative_path = helix_stdx::path::get_relative_path(&self.path) .to_string_lossy() .into_owned(); if current_path .as_ref() .map(|p| p == &self.path) .unwrap_or(false) { format!("{} (*)", relative_path).into() } else { relative_path.into() } } } let config = cx.editor.config(); let smart_case = config.search.smart_case; let file_picker_config = config.file_picker.clone(); let reg = cx.register.unwrap_or('/'); let completions = search_completions(cx, Some(reg)); ui::raw_regex_prompt( cx, "global-search:".into(), Some(reg), move |_editor: &Editor, input: &str| { completions .iter() .filter(|comp| comp.starts_with(input)) .map(|comp| (0.., std::borrow::Cow::Owned(comp.clone()))) .collect() }, move |cx, _, input, event| { if event != PromptEvent::Validate { return; } cx.editor.registers.last_search_register = reg; let current_path = doc_mut!(cx.editor).path().cloned(); let documents: Vec<_> = cx .editor .documents() .map(|doc| (doc.path().cloned(), doc.text().to_owned())) .collect(); if let Ok(matcher) = RegexMatcherBuilder::new() .case_smart(smart_case) .build(input) { let search_root = helix_stdx::env::current_working_dir(); if !search_root.exists() { cx.editor .set_error("Current working directory does not exist"); return; } let (picker, injector) = Picker::stream(current_path); let dedup_symlinks = file_picker_config.deduplicate_links; let absolute_root = search_root .canonicalize() .unwrap_or_else(|_| search_root.clone()); let injector_ = injector.clone(); std::thread::spawn(move || { let searcher = SearcherBuilder::new() .binary_detection(BinaryDetection::quit(b'\x00')) .build(); let mut walk_builder = WalkBuilder::new(search_root); walk_builder .hidden(file_picker_config.hidden) .parents(file_picker_config.parents) .ignore(file_picker_config.ignore) .follow_links(file_picker_config.follow_symlinks) .git_ignore(file_picker_config.git_ignore) .git_global(file_picker_config.git_global) .git_exclude(file_picker_config.git_exclude) .max_depth(file_picker_config.max_depth) .filter_entry(move |entry| { filter_picker_entry(entry, &absolute_root, dedup_symlinks) }); walk_builder .add_custom_ignore_filename(helix_loader::config_dir().join("ignore")); walk_builder.add_custom_ignore_filename(".helix/ignore"); walk_builder.build_parallel().run(|| { let mut searcher = searcher.clone(); let matcher = matcher.clone(); let injector = injector_.clone(); let documents = &documents; Box::new(move |entry: Result| -> WalkState { let entry = match entry { Ok(entry) => entry, Err(_) => return WalkState::Continue, }; match entry.file_type() { Some(entry) if entry.is_file() => {} // skip everything else _ => return WalkState::Continue, }; let mut stop = false; let sink = sinks::UTF8(|line_num, _| { stop = injector .push(FileResult::new(entry.path(), line_num as usize - 1)) .is_err(); Ok(!stop) }); let doc = documents.iter().find(|&(doc_path, _)| { doc_path .as_ref() .map_or(false, |doc_path| doc_path == entry.path()) }); let result = if let Some((_, doc)) = doc { // there is already a buffer for this file // search the buffer instead of the file because it's faster // and captures new edits without requiring a save if searcher.multi_line_with_matcher(&matcher) { // in this case a continous buffer is required // convert the rope to a string let text = doc.to_string(); searcher.search_slice(&matcher, text.as_bytes(), sink) } else { searcher.search_reader( &matcher, RopeReader::new(doc.slice(..)), sink, ) } } else { searcher.search_path(&matcher, entry.path(), sink) }; if let Err(err) = result { log::error!( "Global search error: {}, {}", entry.path().display(), err ); } if stop { WalkState::Quit } else { WalkState::Continue } }) }); }); cx.jobs.callback(async move { let call = move |_: &mut Editor, compositor: &mut Compositor| { let picker = Picker::with_stream( picker, injector, move |cx, FileResult { path, line_num }, action| { let doc = match cx.editor.open(path, action) { Ok(id) => doc_mut!(cx.editor, &id), Err(e) => { cx.editor.set_error(format!( "Failed to open file '{}': {}", path.display(), e )); return; } }; let line_num = *line_num; let view = view_mut!(cx.editor); let text = doc.text(); if line_num >= text.len_lines() { cx.editor.set_error( "The line you jumped to does not exist anymore because the file has changed.", ); return; } let start = text.line_to_char(line_num); let end = text.line_to_char((line_num + 1).min(text.len_lines())); doc.set_selection(view.id, Selection::single(start, end)); if action.align_view(view, doc.id()) { align_view(doc, view, Align::Center); } }, ) .with_preview( |_editor, FileResult { path, line_num }| { Some((path.clone().into(), Some((*line_num, *line_num)))) }, ); compositor.push(Box::new(overlaid(picker))) }; Ok(Callback::EditorCompositor(Box::new(call))) }) } else { // Otherwise do nothing // log::warn!("Global Search Invalid Pattern") } }, ); } enum Extend { Above, Below, } fn extend_line(cx: &mut Context) { let (view, doc) = current_ref!(cx.editor); let extend = match doc.selection(view.id).primary().direction() { Direction::Forward => Extend::Below, Direction::Backward => Extend::Above, }; extend_line_impl(cx, extend); } fn extend_line_below(cx: &mut Context) { extend_line_impl(cx, Extend::Below); } fn extend_line_above(cx: &mut Context) { extend_line_impl(cx, Extend::Above); } fn extend_line_impl(cx: &mut Context, extend: Extend) { let count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text(); let selection = doc.selection(view.id).clone().transform(|range| { let (start_line, end_line) = range.line_range(text.slice(..)); let start = text.line_to_char(start_line); let end = text.line_to_char( (end_line + 1) // newline of end_line .min(text.len_lines()), ); // extend to previous/next line if current line is selected let (anchor, head) = if range.from() == start && range.to() == end { match extend { Extend::Above => (end, text.line_to_char(start_line.saturating_sub(count))), Extend::Below => ( start, text.line_to_char((end_line + count + 1).min(text.len_lines())), ), } } else { match extend { Extend::Above => (end, text.line_to_char(start_line.saturating_sub(count - 1))), Extend::Below => ( start, text.line_to_char((end_line + count).min(text.len_lines())), ), } }; Range::new(anchor, head) }); doc.set_selection(view.id, selection); } fn select_line_below(cx: &mut Context) { select_line_impl(cx, Extend::Below); } fn select_line_above(cx: &mut Context) { select_line_impl(cx, Extend::Above); } fn select_line_impl(cx: &mut Context, extend: Extend) { let mut count = cx.count(); let (view, doc) = current!(cx.editor); let text = doc.text(); let saturating_add = |a: usize, b: usize| (a + b).min(text.len_lines()); let selection = doc.selection(view.id).clone().transform(|range| { let (start_line, end_line) = range.line_range(text.slice(..)); let start = text.line_to_char(start_line); let end = text.line_to_char(saturating_add(end_line, 1)); let direction = range.direction(); // Extending to line bounds is counted as one step if range.from() != start || range.to() != end { count = count.saturating_sub(1) } let (anchor_line, head_line) = match (&extend, direction) { (Extend::Above, Direction::Forward) => (start_line, end_line.saturating_sub(count)), (Extend::Above, Direction::Backward) => (end_line, start_line.saturating_sub(count)), (Extend::Below, Direction::Forward) => (start_line, saturating_add(end_line, count)), (Extend::Below, Direction::Backward) => (end_line, saturating_add(start_line, count)), }; let (anchor, head) = match anchor_line.cmp(&head_line) { Ordering::Less => ( text.line_to_char(anchor_line), text.line_to_char(saturating_add(head_line, 1)), ), Ordering::Equal => match extend { Extend::Above => ( text.line_to_char(saturating_add(anchor_line, 1)), text.line_to_char(head_line), ), Extend::Below => ( text.line_to_char(head_line), text.line_to_char(saturating_add(anchor_line, 1)), ), }, Ordering::Greater => ( text.line_to_char(saturating_add(anchor_line, 1)), text.line_to_char(head_line), ), }; Range::new(anchor, head) }); doc.set_selection(view.id, selection); } fn extend_to_line_bounds(cx: &mut Context) { let (view, doc) = current!(cx.editor); doc.set_selection( view.id, doc.selection(view.id).clone().transform(|range| { let text = doc.text(); let (start_line, end_line) = range.line_range(text.slice(..)); let start = text.line_to_char(start_line); let end = text.line_to_char((end_line + 1).min(text.len_lines())); Range::new(start, end).with_direction(range.direction()) }), ); } fn shrink_to_line_bounds(cx: &mut Context) { let (view, doc) = current!(cx.editor); doc.set_selection( view.id, doc.selection(view.id).clone().transform(|range| { let text = doc.text(); let (start_line, end_line) = range.line_range(text.slice(..)); // Do nothing if the selection is within one line to prevent // conditional logic for the behavior of this command if start_line == end_line { return range; } let mut start = text.line_to_char(start_line); // line_to_char gives us the start position of the line, so // we need to get the start position of the next line. In // the editor, this will correspond to the cursor being on // the EOL whitespace character, which is what we want. let mut end = text.line_to_char((end_line + 1).min(text.len_lines())); if start != range.from() { start = text.line_to_char((start_line + 1).min(text.len_lines())); } if end != range.to() { end = text.line_to_char(end_line); } Range::new(start, end).with_direction(range.direction()) }), ); } enum Operation { Delete, Change, } fn selection_is_linewise(selection: &Selection, text: &Rope) -> bool { selection.ranges().iter().all(|range| { let text = text.slice(..); if range.slice(text).len_lines() < 2 { return false; } // If the start of the selection is at the start of a line and the end at the end of a line. let (start_line, end_line) = range.line_range(text); let start = text.line_to_char(start_line); let end = text.line_to_char((end_line + 1).min(text.len_lines())); start == range.from() && end == range.to() }) } fn delete_selection_impl(cx: &mut Context, op: Operation) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id); let only_whole_lines = selection_is_linewise(selection, doc.text()); if cx.register != Some('_') { // first yank the selection let text = doc.text().slice(..); let values: Vec = selection.fragments(text).map(Cow::into_owned).collect(); let reg_name = cx.register.unwrap_or('"'); if let Err(err) = cx.editor.registers.write(reg_name, values) { cx.editor.set_error(err.to_string()); return; } }; // then delete let transaction = Transaction::delete_by_selection(doc.text(), selection, |range| (range.from(), range.to())); doc.apply(&transaction, view.id); match op { Operation::Delete => { // exit select mode, if currently in select mode exit_select_mode(cx); } Operation::Change => { if only_whole_lines { open_above(cx); } else { enter_insert_mode(cx); } } } } #[inline] fn delete_by_selection_insert_mode( cx: &mut Context, mut f: impl FnMut(RopeSlice, &Range) -> Deletion, direction: Direction, ) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let mut selection = SmallVec::new(); let mut insert_newline = false; let text_len = text.len_chars(); let mut transaction = Transaction::delete_by_selection(doc.text(), doc.selection(view.id), |range| { let (start, end) = f(text, range); if direction == Direction::Forward { let mut range = *range; if range.head > range.anchor { insert_newline |= end == text_len; // move the cursor to the right so that the selection // doesn't shrink when deleting forward (so the text appears to // move to left) // += 1 is enough here as the range is normalized to grapheme boundaries // later anyway range.head += 1; } selection.push(range); } (start, end) }); // in case we delete the last character and the cursor would be moved to the EOF char // insert a newline, just like when entering append mode if insert_newline { transaction = transaction.insert_at_eof(doc.line_ending.as_str().into()); } if direction == Direction::Forward { doc.set_selection( view.id, Selection::new(selection, doc.selection(view.id).primary_index()), ); } doc.apply(&transaction, view.id); } fn delete_selection(cx: &mut Context) { delete_selection_impl(cx, Operation::Delete); } fn delete_selection_noyank(cx: &mut Context) { cx.register = Some('_'); delete_selection_impl(cx, Operation::Delete); } fn change_selection(cx: &mut Context) { delete_selection_impl(cx, Operation::Change); } fn change_selection_noyank(cx: &mut Context) { cx.register = Some('_'); delete_selection_impl(cx, Operation::Change); } fn collapse_selection(cx: &mut Context) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).clone().transform(|range| { let pos = range.cursor(text); Range::new(pos, pos) }); doc.set_selection(view.id, selection); } fn flip_selections(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc .selection(view.id) .clone() .transform(|range| range.flip()); doc.set_selection(view.id, selection); } fn ensure_selections_forward(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = doc .selection(view.id) .clone() .transform(|r| r.with_direction(Direction::Forward)); doc.set_selection(view.id, selection); } fn enter_insert_mode(cx: &mut Context) { cx.editor.mode = Mode::Insert; } // inserts at the start of each selection fn insert_mode(cx: &mut Context) { enter_insert_mode(cx); let (view, doc) = current!(cx.editor); log::trace!( "entering insert mode with sel: {:?}, text: {:?}", doc.selection(view.id), doc.text().to_string() ); let selection = doc .selection(view.id) .clone() .transform(|range| Range::new(range.to(), range.from())); doc.set_selection(view.id, selection); } // inserts at the end of each selection fn append_mode(cx: &mut Context) { enter_insert_mode(cx); let (view, doc) = current!(cx.editor); doc.restore_cursor = true; let text = doc.text().slice(..); // Make sure there's room at the end of the document if the last // selection butts up against it. let end = text.len_chars(); let last_range = doc .selection(view.id) .iter() .last() .expect("selection should always have at least one range"); if !last_range.is_empty() && last_range.to() == end { let transaction = Transaction::change( doc.text(), [(end, end, Some(doc.line_ending.as_str().into()))].into_iter(), ); doc.apply(&transaction, view.id); } let selection = doc.selection(view.id).clone().transform(|range| { Range::new( range.from(), graphemes::next_grapheme_boundary(doc.text().slice(..), range.to()), ) }); doc.set_selection(view.id, selection); } fn file_picker(cx: &mut Context) { let root = find_workspace().0; if !root.exists() { cx.editor.set_error("Workspace directory does not exist"); return; } let picker = ui::file_picker(root, &cx.editor.config()); cx.push_layer(Box::new(overlaid(picker))); } fn file_picker_in_current_buffer_directory(cx: &mut Context) { let doc_dir = doc!(cx.editor) .path() .and_then(|path| path.parent().map(|path| path.to_path_buf())); let path = match doc_dir { Some(path) => path, None => { cx.editor.set_error("current buffer has no path or parent"); return; } }; let picker = ui::file_picker(path, &cx.editor.config()); cx.push_layer(Box::new(overlaid(picker))); } fn file_picker_in_current_directory(cx: &mut Context) { let cwd = helix_stdx::env::current_working_dir(); if !cwd.exists() { cx.editor .set_error("Current working directory does not exist"); return; } let picker = ui::file_picker(cwd, &cx.editor.config()); cx.push_layer(Box::new(overlaid(picker))); } fn open_or_focus_explorer(cx: &mut Context) { cx.callback.push(Box::new( |compositor: &mut Compositor, cx: &mut compositor::Context| { if let Some(editor) = compositor.find::() { match editor.explorer.as_mut() { Some(explore) => explore.focus(), None => match ui::Explorer::new(cx) { Ok(explore) => editor.explorer = Some(explore), Err(err) => cx.editor.set_error(format!("{}", err)), }, } } }, )); } fn reveal_file_in_explorer(cx: &mut Context, path: Option) { cx.callback.push(Box::new( |compositor: &mut Compositor, cx: &mut compositor::Context| { if let Some(editor) = compositor.find::() { (|| match editor.explorer.as_mut() { Some(explorer) => match path { Some(path) => explorer.reveal_file(path), None => explorer.reveal_current_file(cx), }, None => { editor.explorer = Some(ui::Explorer::new(cx)?); if let Some(explorer) = editor.explorer.as_mut() { explorer.reveal_current_file(cx)?; } Ok(()) } })() .unwrap_or_else(|err| cx.editor.set_error(err.to_string())) } }, )); } fn reveal_current_file(cx: &mut Context) { reveal_file_in_explorer(cx, None) } fn buffer_picker(cx: &mut Context) { let current = view!(cx.editor).doc; struct BufferMeta { id: DocumentId, path: Option, is_modified: bool, is_current: bool, focused_at: std::time::Instant, } impl ui::menu::Item for BufferMeta { type Data = (); fn format(&self, _data: &Self::Data) -> Row { let path = self .path .as_deref() .map(helix_stdx::path::get_relative_path); let path = match path.as_deref().and_then(Path::to_str) { Some(path) => path, None => SCRATCH_BUFFER_NAME, }; let mut flags = String::new(); if self.is_modified { flags.push('+'); } if self.is_current { flags.push('*'); } Row::new([self.id.to_string(), flags, path.to_string()]) } } let new_meta = |doc: &Document| BufferMeta { id: doc.id(), path: doc.path().cloned(), is_modified: doc.is_modified(), is_current: doc.id() == current, focused_at: doc.focused_at, }; let mut items = cx .editor .documents .values() .map(new_meta) .collect::>(); // mru items.sort_unstable_by_key(|item| std::cmp::Reverse(item.focused_at)); let picker = Picker::new(items, (), |cx, meta, action| { cx.editor.switch(meta.id, action); }) .with_preview(|editor, meta| { let doc = &editor.documents.get(&meta.id)?; let &view_id = doc.selections().keys().next()?; let line = doc .selection(view_id) .primary() .cursor_line(doc.text().slice(..)); Some((meta.id.into(), Some((line, line)))) }); cx.push_layer(Box::new(overlaid(picker))); } fn jumplist_picker(cx: &mut Context) { struct JumpMeta { id: DocumentId, path: Option, selection: Selection, text: String, is_current: bool, } impl ui::menu::Item for JumpMeta { type Data = (); fn format(&self, _data: &Self::Data) -> Row { let path = self .path .as_deref() .map(helix_stdx::path::get_relative_path); let path = match path.as_deref().and_then(Path::to_str) { Some(path) => path, None => SCRATCH_BUFFER_NAME, }; let mut flags = Vec::new(); if self.is_current { flags.push("*"); } let flag = if flags.is_empty() { "".into() } else { format!(" ({})", flags.join("")) }; format!("{} {}{} {}", self.id, path, flag, self.text).into() } } for (view, _) in cx.editor.tree.views_mut() { for doc_id in view.jumps.iter().map(|e| e.0).collect::>().iter() { let doc = doc_mut!(cx.editor, doc_id); view.sync_changes(doc); } } let new_meta = |view: &View, doc_id: DocumentId, selection: Selection| { let doc = &cx.editor.documents.get(&doc_id); let text = doc.map_or("".into(), |d| { selection .fragments(d.text().slice(..)) .map(Cow::into_owned) .collect::>() .join(" ") }); JumpMeta { id: doc_id, path: doc.and_then(|d| d.path().cloned()), selection, text, is_current: view.doc == doc_id, } }; let picker = Picker::new( cx.editor .tree .views() .flat_map(|(view, _)| { view.jumps .iter() .map(|(doc_id, selection)| new_meta(view, *doc_id, selection.clone())) }) .collect(), (), |cx, meta, action| { cx.editor.switch(meta.id, action); let config = cx.editor.config(); let (view, doc) = (view_mut!(cx.editor), doc_mut!(cx.editor, &meta.id)); doc.set_selection(view.id, meta.selection.clone()); if action.align_view(view, doc.id()) { view.ensure_cursor_in_view_center(doc, config.scrolloff); } }, ) .with_preview(|editor, meta| { let doc = &editor.documents.get(&meta.id)?; let line = meta.selection.primary().cursor_line(doc.text().slice(..)); Some((meta.id.into(), Some((line, line)))) }); cx.push_layer(Box::new(overlaid(picker))); } impl ui::menu::Item for MappableCommand { type Data = ReverseKeymap; fn format(&self, keymap: &Self::Data) -> Row { let fmt_binding = |bindings: &Vec>| -> String { bindings.iter().fold(String::new(), |mut acc, bind| { if !acc.is_empty() { acc.push(' '); } for key in bind { acc.push_str(&key.key_sequence_format()); } acc }) }; match self { MappableCommand::Typable { doc, name, .. } => match keymap.get(name as &String) { Some(bindings) => format!("{} ({}) [:{}]", doc, fmt_binding(bindings), name).into(), None => format!("{} [:{}]", doc, name).into(), }, MappableCommand::Static { doc, name, .. } => match keymap.get(*name) { Some(bindings) => format!("{} ({}) [{}]", doc, fmt_binding(bindings), name).into(), None => format!("{} [{}]", doc, name).into(), }, } } } pub fn command_palette(cx: &mut Context) { let register = cx.register; let count = cx.count; cx.callback.push(Box::new( move |compositor: &mut Compositor, cx: &mut compositor::Context| { let keymap = compositor.find::().unwrap().keymaps.map() [&cx.editor.mode] .reverse_map(); let mut commands: Vec = MappableCommand::STATIC_COMMAND_LIST.into(); commands.extend(typed::TYPABLE_COMMAND_LIST.iter().map(|cmd| { MappableCommand::Typable { name: cmd.name.to_owned(), doc: cmd.doc.to_owned(), args: Vec::new(), } })); let picker = Picker::new(commands, keymap, move |cx, command, _action| { let mut ctx = Context { register, count, editor: cx.editor, callback: Vec::new(), on_next_key_callback: None, jobs: cx.jobs, }; let focus = view!(ctx.editor).id; command.execute(&mut ctx); if ctx.editor.tree.contains(focus) { let config = ctx.editor.config(); let mode = ctx.editor.mode(); let view = view_mut!(ctx.editor, focus); let doc = doc_mut!(ctx.editor, &view.doc); view.ensure_cursor_in_view(doc, config.scrolloff); if mode != Mode::Insert { doc.append_changes_to_history(view); } } }); compositor.push(Box::new(overlaid(picker))); }, )); } fn last_picker(cx: &mut Context) { // TODO: last picker does not seem to work well with buffer_picker cx.callback.push(Box::new(|compositor, cx| { if let Some(picker) = compositor.last_picker.take() { compositor.push(picker); } else { cx.editor.set_error("no last picker") } })); } /// Fallback position to use for [`insert_with_indent`]. enum IndentFallbackPos { LineStart, LineEnd, } // `I` inserts at the first nonwhitespace character of each line with a selection. // If the line is empty, automatically indent. fn insert_at_line_start(cx: &mut Context) { insert_with_indent(cx, IndentFallbackPos::LineStart); } // `A` inserts at the end of each line with a selection. // If the line is empty, automatically indent. fn insert_at_line_end(cx: &mut Context) { insert_with_indent(cx, IndentFallbackPos::LineEnd); } // Enter insert mode and auto-indent the current line if it is empty. // If the line is not empty, move the cursor to the specified fallback position. fn insert_with_indent(cx: &mut Context, cursor_fallback: IndentFallbackPos) { enter_insert_mode(cx); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let contents = doc.text(); let selection = doc.selection(view.id); let language_config = doc.language_config(); let syntax = doc.syntax(); let tab_width = doc.tab_width(); let mut ranges = SmallVec::with_capacity(selection.len()); let mut offs = 0; let mut transaction = Transaction::change_by_selection(contents, selection, |range| { let cursor_line = range.cursor_line(text); let cursor_line_start = text.line_to_char(cursor_line); if line_end_char_index(&text, cursor_line) == cursor_line_start { // line is empty => auto indent let line_end_index = cursor_line_start; let indent = indent::indent_for_newline( language_config, syntax, &doc.config.load().indent_heuristic, &doc.indent_style, tab_width, text, cursor_line, line_end_index, cursor_line, ); // calculate new selection ranges let pos = offs + cursor_line_start; let indent_width = indent.chars().count(); ranges.push(Range::point(pos + indent_width)); offs += indent_width; (line_end_index, line_end_index, Some(indent.into())) } else { // move cursor to the fallback position let pos = match cursor_fallback { IndentFallbackPos::LineStart => text .line(cursor_line) .first_non_whitespace_char() .map(|ws_offset| ws_offset + cursor_line_start) .unwrap_or(cursor_line_start), IndentFallbackPos::LineEnd => line_end_char_index(&text, cursor_line), }; ranges.push(range.put_cursor(text, pos + offs, cx.editor.mode == Mode::Select)); (cursor_line_start, cursor_line_start, None) } }); transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index())); doc.apply(&transaction, view.id); } // Creates an LspCallback that waits for formatting changes to be computed. When they're done, // it applies them, but only if the doc hasn't changed. // // TODO: provide some way to cancel this, probably as part of a more general job cancellation // scheme async fn make_format_callback( doc_id: DocumentId, doc_version: i32, view_id: ViewId, format: impl Future> + Send + 'static, write: Option<(Option, bool)>, ) -> anyhow::Result { let format = format.await; let call: job::Callback = Callback::Editor(Box::new(move |editor| { if !editor.documents.contains_key(&doc_id) || !editor.tree.contains(view_id) { return; } let scrolloff = editor.config().scrolloff; let doc = doc_mut!(editor, &doc_id); let view = view_mut!(editor, view_id); if let Ok(format) = format { if doc.version() == doc_version { doc.apply(&format, view.id); doc.append_changes_to_history(view); doc.detect_indent_and_line_ending(); view.ensure_cursor_in_view(doc, scrolloff); } else { log::info!("discarded formatting changes because the document changed"); } } if let Some((path, force)) = write { let id = doc.id(); if let Err(err) = editor.save(id, path, force) { editor.set_error(format!("Error saving: {}", err)); } } })); Ok(call) } #[derive(PartialEq, Eq)] pub enum Open { Below, Above, } fn open(cx: &mut Context, open: Open) { let count = cx.count(); enter_insert_mode(cx); let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let contents = doc.text(); let selection = doc.selection(view.id); let mut ranges = SmallVec::with_capacity(selection.len()); let mut offs = 0; let mut transaction = Transaction::change_by_selection(contents, selection, |range| { let cursor_line = text.char_to_line(match open { Open::Below => graphemes::prev_grapheme_boundary(text, range.to()), Open::Above => range.from(), }); let new_line = match open { // adjust position to the end of the line (next line - 1) Open::Below => cursor_line + 1, // adjust position to the end of the previous line (current line - 1) Open::Above => cursor_line, }; let line_num = new_line.saturating_sub(1); // Index to insert newlines after, as well as the char width // to use to compensate for those inserted newlines. let (line_end_index, line_end_offset_width) = if new_line == 0 { (0, 0) } else { ( line_end_char_index(&text, line_num), doc.line_ending.len_chars(), ) }; let indent = indent::indent_for_newline( doc.language_config(), doc.syntax(), &doc.config.load().indent_heuristic, &doc.indent_style, doc.tab_width(), text, line_num, line_end_index, cursor_line, ); let indent_len = indent.len(); let mut text = String::with_capacity(1 + indent_len); text.push_str(doc.line_ending.as_str()); text.push_str(&indent); let text = text.repeat(count); // calculate new selection ranges let pos = offs + line_end_index + line_end_offset_width; for i in 0..count { // pos -> beginning of reference line, // + (i * (1+indent_len)) -> beginning of i'th line from pos // + indent_len -> -> indent for i'th line ranges.push(Range::point(pos + (i * (1 + indent_len)) + indent_len)); } offs += text.chars().count(); (line_end_index, line_end_index, Some(text.into())) }); transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index())); doc.apply(&transaction, view.id); } // o inserts a new line after each line with a selection fn open_below(cx: &mut Context) { open(cx, Open::Below) } // O inserts a new line before each line with a selection fn open_above(cx: &mut Context) { open(cx, Open::Above) } fn normal_mode(cx: &mut Context) { cx.editor.enter_normal_mode(); } // Store a jump on the jumplist. fn push_jump(view: &mut View, doc: &Document) { let jump = (doc.id(), doc.selection(view.id).clone()); view.jumps.push(jump); } fn goto_line(cx: &mut Context) { if cx.count.is_some() { let (view, doc) = current!(cx.editor); push_jump(view, doc); goto_line_without_jumplist(cx.editor, cx.count); } } fn goto_line_without_jumplist(editor: &mut Editor, count: Option) { if let Some(count) = count { let (view, doc) = current!(editor); let text = doc.text().slice(..); let max_line = if text.line(text.len_lines() - 1).len_chars() == 0 { // If the last line is blank, don't jump to it. text.len_lines().saturating_sub(2) } else { text.len_lines() - 1 }; let line_idx = std::cmp::min(count.get() - 1, max_line); let pos = text.line_to_char(line_idx); let selection = doc .selection(view.id) .clone() .transform(|range| range.put_cursor(text, pos, editor.mode == Mode::Select)); doc.set_selection(view.id, selection); } } fn goto_last_line(cx: &mut Context) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let line_idx = if text.line(text.len_lines() - 1).len_chars() == 0 { // If the last line is blank, don't jump to it. text.len_lines().saturating_sub(2) } else { text.len_lines() - 1 }; let pos = text.line_to_char(line_idx); let selection = doc .selection(view.id) .clone() .transform(|range| range.put_cursor(text, pos, cx.editor.mode == Mode::Select)); push_jump(view, doc); doc.set_selection(view.id, selection); } fn goto_last_accessed_file(cx: &mut Context) { let view = view_mut!(cx.editor); if let Some(alt) = view.docs_access_history.pop() { cx.editor.switch(alt, Action::Replace); } else { cx.editor.set_error("no last accessed buffer") } } fn goto_last_modification(cx: &mut Context) { let (view, doc) = current!(cx.editor); let pos = doc.history.get_mut().last_edit_pos(); let text = doc.text().slice(..); if let Some(pos) = pos { let selection = doc .selection(view.id) .clone() .transform(|range| range.put_cursor(text, pos, cx.editor.mode == Mode::Select)); doc.set_selection(view.id, selection); } } fn goto_last_modified_file(cx: &mut Context) { let view = view!(cx.editor); let alternate_file = view .last_modified_docs .into_iter() .flatten() .find(|&id| id != view.doc); if let Some(alt) = alternate_file { cx.editor.switch(alt, Action::Replace); } else { cx.editor.set_error("no last modified buffer") } } fn select_mode(cx: &mut Context) { let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); // Make sure end-of-document selections are also 1-width. // (With the exception of being in an empty document, of course.) let selection = doc.selection(view.id).clone().transform(|range| { if range.is_empty() && range.head == text.len_chars() { Range::new( graphemes::prev_grapheme_boundary(text, range.anchor), range.head, ) } else { range } }); doc.set_selection(view.id, selection); cx.editor.mode = Mode::Select; } fn exit_select_mode(cx: &mut Context) { if cx.editor.mode == Mode::Select { cx.editor.mode = Mode::Normal; } } fn goto_first_diag(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = match doc.diagnostics().first() { Some(diag) => Selection::single(diag.range.start, diag.range.end), None => return, }; doc.set_selection(view.id, selection); } fn goto_last_diag(cx: &mut Context) { let (view, doc) = current!(cx.editor); let selection = match doc.diagnostics().last() { Some(diag) => Selection::single(diag.range.start, diag.range.end), None => return, }; doc.set_selection(view.id, selection); } fn goto_next_diag(cx: &mut Context) { let motion = move |editor: &mut Editor| { let (view, doc) = current!(editor); let cursor_pos = doc .selection(view.id) .primary() .cursor(doc.text().slice(..)); let diag = doc .diagnostics() .iter() .find(|diag| diag.range.start > cursor_pos) .or_else(|| doc.diagnostics().first()); let selection = match diag { Some(diag) => Selection::single(diag.range.start, diag.range.end), None => return, }; doc.set_selection(view.id, selection); }; cx.editor.apply_motion(motion); } fn goto_prev_diag(cx: &mut Context) { let motion = move |editor: &mut Editor| { let (view, doc) = current!(editor); let cursor_pos = doc .selection(view.id) .primary() .cursor(doc.text().slice(..)); let diag = doc .diagnostics() .iter() .rev() .find(|diag| diag.range.start < cursor_pos) .or_else(|| doc.diagnostics().last()); let selection = match diag { // NOTE: the selection is reversed because we're jumping to the // previous diagnostic. Some(diag) => Selection::single(diag.range.end, diag.range.start), None => return, }; doc.set_selection(view.id, selection); }; cx.editor.apply_motion(motion) } fn goto_first_change(cx: &mut Context) { goto_first_change_impl(cx, false); } fn goto_last_change(cx: &mut Context) { goto_first_change_impl(cx, true); } fn goto_first_change_impl(cx: &mut Context, reverse: bool) { let editor = &mut cx.editor; let (view, doc) = current!(editor); if let Some(handle) = doc.diff_handle() { let hunk = { let diff = handle.load(); let idx = if reverse { diff.len().saturating_sub(1) } else { 0 }; diff.nth_hunk(idx) }; if hunk != Hunk::NONE { let range = hunk_range(hunk, doc.text().slice(..)); doc.set_selection(view.id, Selection::single(range.anchor, range.head)); } } } fn goto_next_change(cx: &mut Context) { goto_next_change_impl(cx, Direction::Forward) } fn goto_prev_change(cx: &mut Context) { goto_next_change_impl(cx, Direction::Backward) } fn goto_next_change_impl(cx: &mut Context, direction: Direction) { let count = cx.count() as u32 - 1; let motion = move |editor: &mut Editor| { let (view, doc) = current!(editor); let doc_text = doc.text().slice(..); let diff_handle = if let Some(diff_handle) = doc.diff_handle() { diff_handle } else { editor.set_status("Diff is not available in current buffer"); return; }; let selection = doc.selection(view.id).clone().transform(|range| { let cursor_line = range.cursor_line(doc_text) as u32; let diff = diff_handle.load(); let hunk_idx = match direction { Direction::Forward => diff .next_hunk(cursor_line) .map(|idx| (idx + count).min(diff.len() - 1)), Direction::Backward => diff .prev_hunk(cursor_line) .map(|idx| idx.saturating_sub(count)), }; let Some(hunk_idx) = hunk_idx else { return range; }; let hunk = diff.nth_hunk(hunk_idx); let new_range = hunk_range(hunk, doc_text); if editor.mode == Mode::Select { let head = if new_range.head < range.anchor { new_range.anchor } else { new_range.head }; Range::new(range.anchor, head) } else { new_range.with_direction(direction) } }); doc.set_selection(view.id, selection) }; cx.editor.apply_motion(motion); } /// Returns the [Range] for a [Hunk] in the given text. /// Additions and modifications cover the added and modified ranges. /// Deletions are represented as the point at the start of the deletion hunk. fn hunk_range(hunk: Hunk, text: RopeSlice) -> Range { let anchor = text.line_to_char(hunk.after.start as usize); let head = if hunk.after.is_empty() { anchor + 1 } else { text.line_to_char(hunk.after.end as usize) }; Range::new(anchor, head) } pub mod insert { use crate::events::PostInsertChar; use super::*; pub type Hook = fn(&Rope, &Selection, char) -> Option; /// Exclude the cursor in range. fn exclude_cursor(text: RopeSlice, range: Range, cursor: Range) -> Range { if range.to() == cursor.to() && text.len_chars() != cursor.to() { Range::new( range.from(), graphemes::prev_grapheme_boundary(text, cursor.to()), ) } else { range } } // The default insert hook: simply insert the character #[allow(clippy::unnecessary_wraps)] // need to use Option<> because of the Hook signature fn insert(doc: &Rope, selection: &Selection, ch: char) -> Option { let cursors = selection.clone().cursors(doc.slice(..)); let mut t = Tendril::new(); t.push(ch); let transaction = Transaction::insert(doc, &cursors, t); Some(transaction) } use helix_core::auto_pairs; use helix_view::editor::SmartTabConfig; pub fn insert_char(cx: &mut Context, c: char) { let (view, doc) = current_ref!(cx.editor); let text = doc.text(); let selection = doc.selection(view.id); let auto_pairs = doc.auto_pairs(cx.editor); let transaction = auto_pairs .as_ref() .and_then(|ap| auto_pairs::hook(text, selection, c, ap)) .or_else(|| insert(text, selection, c)); let (view, doc) = current!(cx.editor); if let Some(t) = transaction { doc.apply(&t, view.id); } helix_event::dispatch(PostInsertChar { c, cx }); } pub fn smart_tab(cx: &mut Context) { let (view, doc) = current_ref!(cx.editor); let view_id = view.id; if matches!( cx.editor.config().smart_tab, Some(SmartTabConfig { enable: true, .. }) ) { let cursors_after_whitespace = doc.selection(view_id).ranges().iter().all(|range| { let cursor = range.cursor(doc.text().slice(..)); let current_line_num = doc.text().char_to_line(cursor); let current_line_start = doc.text().line_to_char(current_line_num); let left = doc.text().slice(current_line_start..cursor); left.chars().all(|c| c.is_whitespace()) }); if !cursors_after_whitespace { move_parent_node_end(cx); return; } } insert_tab(cx); } pub fn insert_tab(cx: &mut Context) { let (view, doc) = current!(cx.editor); // TODO: round out to nearest indentation level (for example a line with 3 spaces should // indent by one to reach 4 spaces). let indent = Tendril::from(doc.indent_style.as_str()); let transaction = Transaction::insert( doc.text(), &doc.selection(view.id).clone().cursors(doc.text().slice(..)), indent, ); doc.apply(&transaction, view.id); } pub fn insert_newline(cx: &mut Context) { let (view, doc) = current_ref!(cx.editor); let text = doc.text().slice(..); let contents = doc.text(); let selection = doc.selection(view.id).clone(); let mut ranges = SmallVec::with_capacity(selection.len()); // TODO: this is annoying, but we need to do it to properly calculate pos after edits let mut global_offs = 0; let mut transaction = Transaction::change_by_selection(contents, &selection, |range| { let pos = range.cursor(text); let prev = if pos == 0 { ' ' } else { contents.char(pos - 1) }; let curr = contents.get_char(pos).unwrap_or(' '); let current_line = text.char_to_line(pos); let line_is_only_whitespace = text .line(current_line) .chars() .all(|char| char.is_ascii_whitespace()); let mut new_text = String::new(); // If the current line is all whitespace, insert a line ending at the beginning of // the current line. This makes the current line empty and the new line contain the // indentation of the old line. let (from, to, local_offs) = if line_is_only_whitespace { let line_start = text.line_to_char(current_line); new_text.push_str(doc.line_ending.as_str()); (line_start, line_start, new_text.chars().count()) } else { let indent = indent::indent_for_newline( doc.language_config(), doc.syntax(), &doc.config.load().indent_heuristic, &doc.indent_style, doc.tab_width(), text, current_line, pos, current_line, ); // If we are between pairs (such as brackets), we want to // insert an additional line which is indented one level // more and place the cursor there let on_auto_pair = doc .auto_pairs(cx.editor) .and_then(|pairs| pairs.get(prev)) .map_or(false, |pair| pair.open == prev && pair.close == curr); let local_offs = if on_auto_pair { let inner_indent = indent.clone() + doc.indent_style.as_str(); new_text.reserve_exact(2 + indent.len() + inner_indent.len()); new_text.push_str(doc.line_ending.as_str()); new_text.push_str(&inner_indent); let local_offs = new_text.chars().count(); new_text.push_str(doc.line_ending.as_str()); new_text.push_str(&indent); local_offs } else { new_text.reserve_exact(1 + indent.len()); new_text.push_str(doc.line_ending.as_str()); new_text.push_str(&indent); new_text.chars().count() }; (pos, pos, local_offs) }; let new_range = if range.cursor(text) > range.anchor { // when appending, extend the range by local_offs Range::new( range.anchor + global_offs, range.head + local_offs + global_offs, ) } else { // when inserting, slide the range by local_offs Range::new( range.anchor + local_offs + global_offs, range.head + local_offs + global_offs, ) }; // TODO: range replace or extend // range.replace(|range| range.is_empty(), head); -> fn extend if cond true, new head pos // can be used with cx.mode to do replace or extend on most changes ranges.push(new_range); global_offs += new_text.chars().count(); (from, to, Some(new_text.into())) }); transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index())); let (view, doc) = current!(cx.editor); doc.apply(&transaction, view.id); } pub fn delete_char_backward(cx: &mut Context) { let count = cx.count(); let (view, doc) = current_ref!(cx.editor); let text = doc.text().slice(..); let tab_width = doc.tab_width(); let indent_width = doc.indent_width(); let auto_pairs = doc.auto_pairs(cx.editor); let transaction = Transaction::delete_by_selection(doc.text(), doc.selection(view.id), |range| { let pos = range.cursor(text); if pos == 0 { return (pos, pos); } let line_start_pos = text.line_to_char(range.cursor_line(text)); // consider to delete by indent level if all characters before `pos` are indent units. let fragment = Cow::from(text.slice(line_start_pos..pos)); if !fragment.is_empty() && fragment.chars().all(|ch| ch == ' ' || ch == '\t') { if text.get_char(pos.saturating_sub(1)) == Some('\t') { // fast path, delete one char (graphemes::nth_prev_grapheme_boundary(text, pos, 1), pos) } else { let width: usize = fragment .chars() .map(|ch| { if ch == '\t' { tab_width } else { // it can be none if it still meet control characters other than '\t' // here just set the width to 1 (or some value better?). ch.width().unwrap_or(1) } }) .sum(); let mut drop = width % indent_width; // round down to nearest unit if drop == 0 { drop = indent_width }; // if it's already at a unit, consume a whole unit let mut chars = fragment.chars().rev(); let mut start = pos; for _ in 0..drop { // delete up to `drop` spaces match chars.next() { Some(' ') => start -= 1, _ => break, } } (start, pos) // delete! } } else { match ( text.get_char(pos.saturating_sub(1)), text.get_char(pos), auto_pairs, ) { (Some(_x), Some(_y), Some(ap)) if range.is_single_grapheme(text) && ap.get(_x).is_some() && ap.get(_x).unwrap().open == _x && ap.get(_x).unwrap().close == _y => // delete both autopaired characters { ( graphemes::nth_prev_grapheme_boundary(text, pos, count), graphemes::nth_next_grapheme_boundary(text, pos, count), ) } _ => // delete 1 char { (graphemes::nth_prev_grapheme_boundary(text, pos, count), pos) } } } }); let (view, doc) = current!(cx.editor); doc.apply(&transaction, view.id); } pub fn delete_char_forward(cx: &mut Context) { let count = cx.count(); delete_by_selection_insert_mode( cx, |text, range| { let pos = range.cursor(text); (pos, graphemes::nth_next_grapheme_boundary(text, pos, count)) }, Direction::Forward, ) } pub fn delete_word_backward(cx: &mut Context) { let count = cx.count(); delete_by_selection_insert_mode( cx, |text, range| { let anchor = movement::move_prev_word_start(text, *range, count).from(); let next = Range::new(anchor, range.cursor(text)); let range = exclude_cursor(text, next, *range); (range.from(), range.to()) }, Direction::Backward, ); } pub fn delete_word_forward(cx: &mut Context) { let count = cx.count(); delete_by_selection_insert_mode( cx, |text, range| { let head = movement::move_next_word_end(text, *range, count).to(); (range.cursor(text), head) }, Direction::Forward, ); } } // Undo / Redo fn undo(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); for _ in 0..count { if !doc.undo(view) { cx.editor.set_status("Already at oldest change"); break; } } } fn redo(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); for _ in 0..count { if !doc.redo(view) { cx.editor.set_status("Already at newest change"); break; } } } fn earlier(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); for _ in 0..count { // rather than doing in batch we do this so get error halfway if !doc.earlier(view, UndoKind::Steps(1)) { cx.editor.set_status("Already at oldest change"); break; } } } fn later(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); for _ in 0..count { // rather than doing in batch we do this so get error halfway if !doc.later(view, UndoKind::Steps(1)) { cx.editor.set_status("Already at newest change"); break; } } } fn commit_undo_checkpoint(cx: &mut Context) { let (view, doc) = current!(cx.editor); doc.append_changes_to_history(view); } // Yank / Paste fn yank(cx: &mut Context) { yank_impl(cx.editor, cx.register.unwrap_or('"')); exit_select_mode(cx); } fn yank_to_clipboard(cx: &mut Context) { yank_impl(cx.editor, '+'); exit_select_mode(cx); } fn yank_to_primary_clipboard(cx: &mut Context) { yank_impl(cx.editor, '*'); exit_select_mode(cx); } fn yank_impl(editor: &mut Editor, register: char) { let (view, doc) = current!(editor); let text = doc.text().slice(..); let values: Vec = doc .selection(view.id) .fragments(text) .map(Cow::into_owned) .collect(); let selections = values.len(); match editor.registers.write(register, values) { Ok(_) => editor.set_status(format!( "yanked {selections} selection{} to register {register}", if selections == 1 { "" } else { "s" } )), Err(err) => editor.set_error(err.to_string()), } } fn yank_joined_impl(editor: &mut Editor, separator: &str, register: char) { let (view, doc) = current!(editor); let text = doc.text().slice(..); let selection = doc.selection(view.id); let selections = selection.len(); let joined = selection .fragments(text) .fold(String::new(), |mut acc, fragment| { if !acc.is_empty() { acc.push_str(separator); } acc.push_str(&fragment); acc }); match editor.registers.write(register, vec![joined]) { Ok(_) => editor.set_status(format!( "joined and yanked {selections} selection{} to register {register}", if selections == 1 { "" } else { "s" } )), Err(err) => editor.set_error(err.to_string()), } } fn yank_joined(cx: &mut Context) { let separator = doc!(cx.editor).line_ending.as_str(); yank_joined_impl(cx.editor, separator, cx.register.unwrap_or('"')); exit_select_mode(cx); } fn yank_joined_to_clipboard(cx: &mut Context) { let line_ending = doc!(cx.editor).line_ending; yank_joined_impl(cx.editor, line_ending.as_str(), '+'); exit_select_mode(cx); } fn yank_joined_to_primary_clipboard(cx: &mut Context) { let line_ending = doc!(cx.editor).line_ending; yank_joined_impl(cx.editor, line_ending.as_str(), '*'); exit_select_mode(cx); } fn yank_primary_selection_impl(editor: &mut Editor, register: char) { let (view, doc) = current!(editor); let text = doc.text().slice(..); let selection = doc.selection(view.id).primary().fragment(text).to_string(); match editor.registers.write(register, vec![selection]) { Ok(_) => editor.set_status(format!("yanked primary selection to register {register}",)), Err(err) => editor.set_error(err.to_string()), } } fn yank_main_selection_to_clipboard(cx: &mut Context) { yank_primary_selection_impl(cx.editor, '+'); exit_select_mode(cx); } fn yank_main_selection_to_primary_clipboard(cx: &mut Context) { yank_primary_selection_impl(cx.editor, '*'); exit_select_mode(cx); } #[derive(Copy, Clone)] enum Paste { Before, After, Cursor, } fn paste_impl( values: &[String], doc: &mut Document, view: &mut View, action: Paste, count: usize, mode: Mode, ) { if values.is_empty() { return; } let repeat = std::iter::repeat( // `values` is asserted to have at least one entry above. values .last() .map(|value| Tendril::from(value.repeat(count))) .unwrap(), ); // if any of values ends with a line ending, it's linewise paste let linewise = values .iter() .any(|value| get_line_ending_of_str(value).is_some()); // Only compiled once. static REGEX: Lazy = Lazy::new(|| Regex::new(r"\r\n|\r|\n").unwrap()); let mut values = values .iter() .map(|value| REGEX.replace_all(value, doc.line_ending.as_str())) .map(|value| Tendril::from(value.as_ref().repeat(count))) .chain(repeat); let text = doc.text(); let selection = doc.selection(view.id); let mut offset = 0; let mut ranges = SmallVec::with_capacity(selection.len()); let mut transaction = Transaction::change_by_selection(text, selection, |range| { let pos = match (action, linewise) { // paste linewise before (Paste::Before, true) => text.line_to_char(text.char_to_line(range.from())), // paste linewise after (Paste::After, true) => { let line = range.line_range(text.slice(..)).1; text.line_to_char((line + 1).min(text.len_lines())) } // paste insert (Paste::Before, false) => range.from(), // paste append (Paste::After, false) => range.to(), // paste at cursor (Paste::Cursor, _) => range.cursor(text.slice(..)), }; let value = values.next(); let value_len = value .as_ref() .map(|content| content.chars().count()) .unwrap_or_default(); let anchor = offset + pos; let new_range = Range::new(anchor, anchor + value_len).with_direction(range.direction()); ranges.push(new_range); offset += value_len; (pos, pos, value) }); if mode == Mode::Normal { transaction = transaction.with_selection(Selection::new(ranges, selection.primary_index())); } doc.apply(&transaction, view.id); doc.append_changes_to_history(view); } pub(crate) fn paste_bracketed_value(cx: &mut Context, contents: String) { let count = cx.count(); let paste = match cx.editor.mode { Mode::Insert | Mode::Select => Paste::Cursor, Mode::Normal => Paste::Before, }; let (view, doc) = current!(cx.editor); paste_impl(&[contents], doc, view, paste, count, cx.editor.mode); exit_select_mode(cx); } fn paste_clipboard_after(cx: &mut Context) { paste(cx.editor, '+', Paste::After, cx.count()); exit_select_mode(cx); } fn paste_clipboard_before(cx: &mut Context) { paste(cx.editor, '+', Paste::Before, cx.count()); exit_select_mode(cx); } fn paste_primary_clipboard_after(cx: &mut Context) { paste(cx.editor, '*', Paste::After, cx.count()); exit_select_mode(cx); } fn paste_primary_clipboard_before(cx: &mut Context) { paste(cx.editor, '*', Paste::Before, cx.count()); exit_select_mode(cx); } fn replace_with_yanked(cx: &mut Context) { replace_with_yanked_impl(cx.editor, cx.register.unwrap_or('"'), cx.count()); exit_select_mode(cx); } fn replace_with_yanked_impl(editor: &mut Editor, register: char, count: usize) { let Some(values) = editor .registers .read(register, editor) .filter(|values| values.len() > 0) else { return; }; let values: Vec<_> = values.map(|value| value.to_string()).collect(); let scrolloff = editor.config().scrolloff; let (view, doc) = current!(editor); let repeat = std::iter::repeat( values .last() .map(|value| Tendril::from(&value.repeat(count))) .unwrap(), ); let mut values = values .iter() .map(|value| Tendril::from(&value.repeat(count))) .chain(repeat); let selection = doc.selection(view.id); let transaction = Transaction::change_by_selection(doc.text(), selection, |range| { if !range.is_empty() { (range.from(), range.to(), Some(values.next().unwrap())) } else { (range.from(), range.to(), None) } }); doc.apply(&transaction, view.id); doc.append_changes_to_history(view); view.ensure_cursor_in_view(doc, scrolloff); } fn replace_selections_with_clipboard(cx: &mut Context) { replace_with_yanked_impl(cx.editor, '+', cx.count()); exit_select_mode(cx); } fn replace_selections_with_primary_clipboard(cx: &mut Context) { replace_with_yanked_impl(cx.editor, '*', cx.count()); exit_select_mode(cx); } fn paste(editor: &mut Editor, register: char, pos: Paste, count: usize) { let Some(values) = editor.registers.read(register, editor) else { return; }; let values: Vec<_> = values.map(|value| value.to_string()).collect(); let (view, doc) = current!(editor); paste_impl(&values, doc, view, pos, count, editor.mode); } fn paste_after(cx: &mut Context) { paste( cx.editor, cx.register.unwrap_or('"'), Paste::After, cx.count(), ); exit_select_mode(cx); } fn paste_before(cx: &mut Context) { paste( cx.editor, cx.register.unwrap_or('"'), Paste::Before, cx.count(), ); exit_select_mode(cx); } fn get_lines(doc: &Document, view_id: ViewId) -> Vec { let mut lines = Vec::new(); // Get all line numbers for range in doc.selection(view_id) { let (start, end) = range.line_range(doc.text().slice(..)); for line in start..=end { lines.push(line) } } lines.sort_unstable(); // sorting by usize so _unstable is preferred lines.dedup(); lines } fn indent(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let lines = get_lines(doc, view.id); // Indent by one level let indent = Tendril::from(doc.indent_style.as_str().repeat(count)); let transaction = Transaction::change( doc.text(), lines.into_iter().filter_map(|line| { let is_blank = doc.text().line(line).chunks().all(|s| s.trim().is_empty()); if is_blank { return None; } let pos = doc.text().line_to_char(line); Some((pos, pos, Some(indent.clone()))) }), ); doc.apply(&transaction, view.id); exit_select_mode(cx); } fn unindent(cx: &mut Context) { let count = cx.count(); let (view, doc) = current!(cx.editor); let lines = get_lines(doc, view.id); let mut changes = Vec::with_capacity(lines.len()); let tab_width = doc.tab_width(); let indent_width = count * doc.indent_width(); for line_idx in lines { let line = doc.text().line(line_idx); let mut width = 0; let mut pos = 0; for ch in line.chars() { match ch { ' ' => width += 1, '\t' => width = (width / tab_width + 1) * tab_width, _ => break, } pos += 1; if width >= indent_width { break; } } // now delete from start to first non-blank if pos > 0 { let start = doc.text().line_to_char(line_idx); changes.push((start, start + pos, None)) } } let transaction = Transaction::change(doc.text(), changes.into_iter()); doc.apply(&transaction, view.id); exit_select_mode(cx); } fn format_selections(cx: &mut Context) { use helix_lsp::{lsp, util::range_to_lsp_range}; let (view, doc) = current!(cx.editor); let view_id = view.id; // via lsp if available // TODO: else via tree-sitter indentation calculations if doc.selection(view_id).len() != 1 { cx.editor .set_error("format_selections only supports a single selection for now"); return; } // TODO extra LanguageServerFeature::FormatSelections? // maybe such that LanguageServerFeature::Format contains it as well let Some(language_server) = doc .language_servers_with_feature(LanguageServerFeature::Format) .find(|ls| { matches!( ls.capabilities().document_range_formatting_provider, Some(lsp::OneOf::Left(true) | lsp::OneOf::Right(_)) ) }) else { cx.editor .set_error("No configured language server supports range formatting"); return; }; let offset_encoding = language_server.offset_encoding(); let ranges: Vec = doc .selection(view_id) .iter() .map(|range| range_to_lsp_range(doc.text(), *range, offset_encoding)) .collect(); // TODO: handle fails // TODO: concurrent map over all ranges let range = ranges[0]; let future = language_server .text_document_range_formatting( doc.identifier(), range, lsp::FormattingOptions::default(), None, ) .unwrap(); let edits = tokio::task::block_in_place(|| helix_lsp::block_on(future)).unwrap_or_default(); let transaction = helix_lsp::util::generate_transaction_from_edits(doc.text(), edits, offset_encoding); doc.apply(&transaction, view_id); } fn join_selections_impl(cx: &mut Context, select_space: bool) { use movement::skip_while; let (view, doc) = current!(cx.editor); let text = doc.text(); let slice = text.slice(..); let mut changes = Vec::new(); for selection in doc.selection(view.id) { let (start, mut end) = selection.line_range(slice); if start == end { end = (end + 1).min(text.len_lines() - 1); } let lines = start..end; changes.reserve(lines.len()); for line in lines { let start = line_end_char_index(&slice, line); let mut end = text.line_to_char(line + 1); end = skip_while(slice, end, |ch| matches!(ch, ' ' | '\t')).unwrap_or(end); let separator = if end == line_end_char_index(&slice, line + 1) { // the joining line contains only space-characters => don't include a whitespace when joining None } else { Some(Tendril::from(" ")) }; changes.push((start, end, separator)); } } // nothing to do, bail out early to avoid crashes later if changes.is_empty() { return; } changes.sort_unstable_by_key(|(from, _to, _text)| *from); changes.dedup(); // select inserted spaces let transaction = if select_space { let mut offset: usize = 0; let ranges: SmallVec<_> = changes .iter() .filter_map(|change| { if change.2.is_some() { let range = Range::point(change.0 - offset); offset += change.1 - change.0 - 1; // -1 adjusts for the replacement of the range by a space Some(range) } else { offset += change.1 - change.0; None } }) .collect(); let t = Transaction::change(text, changes.into_iter()); if ranges.is_empty() { t } else { let selection = Selection::new(ranges, 0); t.with_selection(selection) } } else { Transaction::change(text, changes.into_iter()) }; doc.apply(&transaction, view.id); } fn keep_or_remove_selections_impl(cx: &mut Context, remove: bool) { // keep or remove selections matching regex let reg = cx.register.unwrap_or('/'); ui::regex_prompt( cx, if remove { "remove:" } else { "keep:" }.into(), Some(reg), ui::completers::none, move |cx, regex, event| { let (view, doc) = current!(cx.editor); if !matches!(event, PromptEvent::Update | PromptEvent::Validate) { return; } let text = doc.text().slice(..); if let Some(selection) = selection::keep_or_remove_matches(text, doc.selection(view.id), ®ex, remove) { doc.set_selection(view.id, selection); } }, ) } fn join_selections(cx: &mut Context) { join_selections_impl(cx, false) } fn join_selections_space(cx: &mut Context) { join_selections_impl(cx, true) } fn keep_selections(cx: &mut Context) { keep_or_remove_selections_impl(cx, false) } fn remove_selections(cx: &mut Context) { keep_or_remove_selections_impl(cx, true) } fn keep_primary_selection(cx: &mut Context) { let (view, doc) = current!(cx.editor); // TODO: handle count let range = doc.selection(view.id).primary(); doc.set_selection(view.id, Selection::single(range.anchor, range.head)); } fn remove_primary_selection(cx: &mut Context) { let (view, doc) = current!(cx.editor); // TODO: handle count let selection = doc.selection(view.id); if selection.len() == 1 { cx.editor.set_error("no selections remaining"); return; } let index = selection.primary_index(); let selection = selection.clone().remove(index); doc.set_selection(view.id, selection); } pub fn completion(cx: &mut Context) { let (view, doc) = current!(cx.editor); let range = doc.selection(view.id).primary(); let text = doc.text().slice(..); let cursor = range.cursor(text); cx.editor .handlers .trigger_completions(cursor, doc.id(), view.id); } // comments type CommentTransactionFn = fn( line_token: Option<&str>, block_tokens: Option<&[BlockCommentToken]>, doc: &Rope, selection: &Selection, ) -> Transaction; fn toggle_comments_impl(cx: &mut Context, comment_transaction: CommentTransactionFn) { let (view, doc) = current!(cx.editor); let line_token: Option<&str> = doc .language_config() .and_then(|lc| lc.comment_tokens.as_ref()) .and_then(|tc| tc.first()) .map(|tc| tc.as_str()); let block_tokens: Option<&[BlockCommentToken]> = doc .language_config() .and_then(|lc| lc.block_comment_tokens.as_ref()) .map(|tc| &tc[..]); let transaction = comment_transaction(line_token, block_tokens, doc.text(), doc.selection(view.id)); doc.apply(&transaction, view.id); exit_select_mode(cx); } /// commenting behavior: /// 1. only line comment tokens -> line comment /// 2. each line block commented -> uncomment all lines /// 3. whole selection block commented -> uncomment selection /// 4. all lines not commented and block tokens -> comment uncommented lines /// 5. no comment tokens and not block commented -> line comment fn toggle_comments(cx: &mut Context) { toggle_comments_impl(cx, |line_token, block_tokens, doc, selection| { let text = doc.slice(..); // only have line comment tokens if line_token.is_some() && block_tokens.is_none() { return comment::toggle_line_comments(doc, selection, line_token); } let split_lines = comment::split_lines_of_selection(text, selection); let default_block_tokens = &[BlockCommentToken::default()]; let block_comment_tokens = block_tokens.unwrap_or(default_block_tokens); let (line_commented, line_comment_changes) = comment::find_block_comments(block_comment_tokens, text, &split_lines); // block commented by line would also be block commented so check this first if line_commented { return comment::create_block_comment_transaction( doc, &split_lines, line_commented, line_comment_changes, ) .0; } let (block_commented, comment_changes) = comment::find_block_comments(block_comment_tokens, text, selection); // check if selection has block comments if block_commented { return comment::create_block_comment_transaction( doc, selection, block_commented, comment_changes, ) .0; } // not commented and only have block comment tokens if line_token.is_none() && block_tokens.is_some() { return comment::create_block_comment_transaction( doc, &split_lines, line_commented, line_comment_changes, ) .0; } // not block commented at all and don't have any tokens comment::toggle_line_comments(doc, selection, line_token) }) } fn toggle_line_comments(cx: &mut Context) { toggle_comments_impl(cx, |line_token, block_tokens, doc, selection| { if line_token.is_none() && block_tokens.is_some() { let default_block_tokens = &[BlockCommentToken::default()]; let block_comment_tokens = block_tokens.unwrap_or(default_block_tokens); comment::toggle_block_comments( doc, &comment::split_lines_of_selection(doc.slice(..), selection), block_comment_tokens, ) } else { comment::toggle_line_comments(doc, selection, line_token) } }); } fn toggle_block_comments(cx: &mut Context) { toggle_comments_impl(cx, |line_token, block_tokens, doc, selection| { if line_token.is_some() && block_tokens.is_none() { comment::toggle_line_comments(doc, selection, line_token) } else { let default_block_tokens = &[BlockCommentToken::default()]; let block_comment_tokens = block_tokens.unwrap_or(default_block_tokens); comment::toggle_block_comments(doc, selection, block_comment_tokens) } }); } fn rotate_selections(cx: &mut Context, direction: Direction) { let count = cx.count(); let (view, doc) = current!(cx.editor); let mut selection = doc.selection(view.id).clone(); let index = selection.primary_index(); let len = selection.len(); selection.set_primary_index(match direction { Direction::Forward => (index + count) % len, Direction::Backward => (index + (len.saturating_sub(count) % len)) % len, }); doc.set_selection(view.id, selection); } fn rotate_selections_forward(cx: &mut Context) { rotate_selections(cx, Direction::Forward) } fn rotate_selections_backward(cx: &mut Context) { rotate_selections(cx, Direction::Backward) } enum ReorderStrategy { RotateForward, RotateBackward, Reverse, } fn reorder_selection_contents(cx: &mut Context, strategy: ReorderStrategy) { let count = cx.count; let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id); let mut fragments: Vec<_> = selection .slices(text) .map(|fragment| fragment.chunks().collect()) .collect(); let group = count .map(|count| count.get()) .unwrap_or(fragments.len()) // default to rotating everything as one group .min(fragments.len()); for chunk in fragments.chunks_mut(group) { // TODO: also modify main index match strategy { ReorderStrategy::RotateForward => chunk.rotate_right(1), ReorderStrategy::RotateBackward => chunk.rotate_left(1), ReorderStrategy::Reverse => chunk.reverse(), }; } let transaction = Transaction::change( doc.text(), selection .ranges() .iter() .zip(fragments) .map(|(range, fragment)| (range.from(), range.to(), Some(fragment))), ); doc.apply(&transaction, view.id); } fn rotate_selection_contents_forward(cx: &mut Context) { reorder_selection_contents(cx, ReorderStrategy::RotateForward) } fn rotate_selection_contents_backward(cx: &mut Context) { reorder_selection_contents(cx, ReorderStrategy::RotateBackward) } fn reverse_selection_contents(cx: &mut Context) { reorder_selection_contents(cx, ReorderStrategy::Reverse) } // tree sitter node selection fn expand_selection(cx: &mut Context) { let motion = |editor: &mut Editor| { let (view, doc) = current!(editor); if let Some(syntax) = doc.syntax() { let text = doc.text().slice(..); let current_selection = doc.selection(view.id); let selection = object::expand_selection(syntax, text, current_selection.clone()); // check if selection is different from the last one if *current_selection != selection { // save current selection so it can be restored using shrink_selection view.object_selections.push(current_selection.clone()); doc.set_selection(view.id, selection); } } }; cx.editor.apply_motion(motion); } fn shrink_selection(cx: &mut Context) { let motion = |editor: &mut Editor| { let (view, doc) = current!(editor); let current_selection = doc.selection(view.id); // try to restore previous selection if let Some(prev_selection) = view.object_selections.pop() { if current_selection.contains(&prev_selection) { doc.set_selection(view.id, prev_selection); return; } else { // clear existing selection as they can't be shrunk to anyway view.object_selections.clear(); } } // if not previous selection, shrink to first child if let Some(syntax) = doc.syntax() { let text = doc.text().slice(..); let selection = object::shrink_selection(syntax, text, current_selection.clone()); doc.set_selection(view.id, selection); } }; cx.editor.apply_motion(motion); } fn select_sibling_impl(cx: &mut Context, sibling_fn: F) where F: Fn(&helix_core::Syntax, RopeSlice, Selection) -> Selection + 'static, { let motion = move |editor: &mut Editor| { let (view, doc) = current!(editor); if let Some(syntax) = doc.syntax() { let text = doc.text().slice(..); let current_selection = doc.selection(view.id); let selection = sibling_fn(syntax, text, current_selection.clone()); doc.set_selection(view.id, selection); } }; cx.editor.apply_motion(motion); } fn select_next_sibling(cx: &mut Context) { select_sibling_impl(cx, object::select_next_sibling) } fn select_prev_sibling(cx: &mut Context) { select_sibling_impl(cx, object::select_prev_sibling) } fn move_node_bound_impl(cx: &mut Context, dir: Direction, movement: Movement) { let motion = move |editor: &mut Editor| { let (view, doc) = current!(editor); if let Some(syntax) = doc.syntax() { let text = doc.text().slice(..); let current_selection = doc.selection(view.id); let selection = movement::move_parent_node_end( syntax, text, current_selection.clone(), dir, movement, ); doc.set_selection(view.id, selection); } }; cx.editor.apply_motion(motion); } pub fn move_parent_node_end(cx: &mut Context) { move_node_bound_impl(cx, Direction::Forward, Movement::Move) } pub fn move_parent_node_start(cx: &mut Context) { move_node_bound_impl(cx, Direction::Backward, Movement::Move) } pub fn extend_parent_node_end(cx: &mut Context) { move_node_bound_impl(cx, Direction::Forward, Movement::Extend) } pub fn extend_parent_node_start(cx: &mut Context) { move_node_bound_impl(cx, Direction::Backward, Movement::Extend) } fn match_brackets(cx: &mut Context) { let (view, doc) = current!(cx.editor); let is_select = cx.editor.mode == Mode::Select; let text = doc.text(); let text_slice = text.slice(..); let selection = doc.selection(view.id).clone().transform(|range| { let pos = range.cursor(text_slice); if let Some(matched_pos) = doc.syntax().map_or_else( || match_brackets::find_matching_bracket_plaintext(text.slice(..), pos), |syntax| match_brackets::find_matching_bracket_fuzzy(syntax, text.slice(..), pos), ) { range.put_cursor(text_slice, matched_pos, is_select) } else { range } }); doc.set_selection(view.id, selection); } // fn jump_forward(cx: &mut Context) { let count = cx.count(); let config = cx.editor.config(); let view = view_mut!(cx.editor); let doc_id = view.doc; if let Some((id, selection)) = view.jumps.forward(count) { view.doc = *id; let selection = selection.clone(); let (view, doc) = current!(cx.editor); // refetch doc if doc.id() != doc_id { view.add_to_history(doc_id); } doc.set_selection(view.id, selection); view.ensure_cursor_in_view_center(doc, config.scrolloff); }; } fn jump_backward(cx: &mut Context) { let count = cx.count(); let config = cx.editor.config(); let (view, doc) = current!(cx.editor); let doc_id = doc.id(); if let Some((id, selection)) = view.jumps.backward(view.id, doc, count) { view.doc = *id; let selection = selection.clone(); let (view, doc) = current!(cx.editor); // refetch doc if doc.id() != doc_id { view.add_to_history(doc_id); } doc.set_selection(view.id, selection); view.ensure_cursor_in_view_center(doc, config.scrolloff); }; } fn save_selection(cx: &mut Context) { let (view, doc) = current!(cx.editor); push_jump(view, doc); cx.editor.set_status("Selection saved to jumplist"); } fn rotate_view(cx: &mut Context) { cx.editor.focus_next() } fn rotate_view_reverse(cx: &mut Context) { cx.editor.focus_prev() } fn jump_view_right(cx: &mut Context) { cx.editor.focus_direction(tree::Direction::Right) } fn jump_view_left(cx: &mut Context) { cx.editor.focus_direction(tree::Direction::Left) } fn jump_view_up(cx: &mut Context) { cx.editor.focus_direction(tree::Direction::Up) } fn jump_view_down(cx: &mut Context) { cx.editor.focus_direction(tree::Direction::Down) } fn swap_view_right(cx: &mut Context) { cx.editor.swap_split_in_direction(tree::Direction::Right) } fn swap_view_left(cx: &mut Context) { cx.editor.swap_split_in_direction(tree::Direction::Left) } fn swap_view_up(cx: &mut Context) { cx.editor.swap_split_in_direction(tree::Direction::Up) } fn swap_view_down(cx: &mut Context) { cx.editor.swap_split_in_direction(tree::Direction::Down) } fn transpose_view(cx: &mut Context) { cx.editor.transpose_view() } /// Open a new split in the given direction specified by the action. /// /// Maintain the current view (both the cursor's position and view in document). fn split(editor: &mut Editor, action: Action) { let (view, doc) = current!(editor); let id = doc.id(); let selection = doc.selection(view.id).clone(); let offset = view.offset; editor.switch(id, action); // match the selection in the previous view let (view, doc) = current!(editor); doc.set_selection(view.id, selection); // match the view scroll offset (switch doesn't handle this fully // since the selection is only matched after the split) view.offset = offset; } fn hsplit(cx: &mut Context) { split(cx.editor, Action::HorizontalSplit); } fn hsplit_new(cx: &mut Context) { cx.editor.new_file(Action::HorizontalSplit); } fn vsplit(cx: &mut Context) { split(cx.editor, Action::VerticalSplit); } fn vsplit_new(cx: &mut Context) { cx.editor.new_file(Action::VerticalSplit); } fn wclose(cx: &mut Context) { if cx.editor.tree.views().count() == 1 { if let Err(err) = typed::buffers_remaining_impl(cx.editor) { cx.editor.set_error(err.to_string()); return; } } let view_id = view!(cx.editor).id; // close current split cx.editor.close(view_id); } fn wonly(cx: &mut Context) { let views = cx .editor .tree .views() .map(|(v, focus)| (v.id, focus)) .collect::>(); for (view_id, focus) in views { if !focus { cx.editor.close(view_id); } } } fn select_register(cx: &mut Context) { cx.editor.autoinfo = Some(Info::from_registers(&cx.editor.registers)); cx.on_next_key(move |cx, event| { if let Some(ch) = event.char() { cx.editor.autoinfo = None; cx.editor.selected_register = Some(ch); } }) } fn insert_register(cx: &mut Context) { cx.editor.autoinfo = Some(Info::from_registers(&cx.editor.registers)); cx.on_next_key(move |cx, event| { if let Some(ch) = event.char() { cx.editor.autoinfo = None; cx.register = Some(ch); paste( cx.editor, cx.register.unwrap_or('"'), Paste::Cursor, cx.count(), ); } }) } fn align_view_top(cx: &mut Context) { let (view, doc) = current!(cx.editor); align_view(doc, view, Align::Top); } fn align_view_center(cx: &mut Context) { let (view, doc) = current!(cx.editor); align_view(doc, view, Align::Center); } fn align_view_bottom(cx: &mut Context) { let (view, doc) = current!(cx.editor); align_view(doc, view, Align::Bottom); } fn align_view_middle(cx: &mut Context) { let (view, doc) = current!(cx.editor); let inner_width = view.inner_width(doc); let text_fmt = doc.text_format(inner_width, None); // there is no horizontal position when softwrap is enabled if text_fmt.soft_wrap { return; } let doc_text = doc.text().slice(..); let annotations = view.text_annotations(doc, None); let pos = doc.selection(view.id).primary().cursor(doc_text); let pos = visual_offset_from_block(doc_text, view.offset.anchor, pos, &text_fmt, &annotations).0; view.offset.horizontal_offset = pos .col .saturating_sub((view.inner_area(doc).width as usize) / 2); } fn scroll_up(cx: &mut Context) { scroll(cx, cx.count(), Direction::Backward, false); } fn scroll_down(cx: &mut Context) { scroll(cx, cx.count(), Direction::Forward, false); } fn goto_ts_object_impl(cx: &mut Context, object: &'static str, direction: Direction) { let count = cx.count(); let motion = move |editor: &mut Editor| { let (view, doc) = current!(editor); if let Some((lang_config, syntax)) = doc.language_config().zip(doc.syntax()) { let text = doc.text().slice(..); let root = syntax.tree().root_node(); let selection = doc.selection(view.id).clone().transform(|range| { let new_range = movement::goto_treesitter_object( text, range, object, direction, root, lang_config, count, ); if editor.mode == Mode::Select { let head = if new_range.head < range.anchor { new_range.anchor } else { new_range.head }; Range::new(range.anchor, head) } else { new_range.with_direction(direction) } }); doc.set_selection(view.id, selection); } else { editor.set_status("Syntax-tree is not available in current buffer"); } }; cx.editor.apply_motion(motion); } fn goto_next_function(cx: &mut Context) { goto_ts_object_impl(cx, "function", Direction::Forward) } fn goto_prev_function(cx: &mut Context) { goto_ts_object_impl(cx, "function", Direction::Backward) } fn goto_next_class(cx: &mut Context) { goto_ts_object_impl(cx, "class", Direction::Forward) } fn goto_prev_class(cx: &mut Context) { goto_ts_object_impl(cx, "class", Direction::Backward) } fn goto_next_parameter(cx: &mut Context) { goto_ts_object_impl(cx, "parameter", Direction::Forward) } fn goto_prev_parameter(cx: &mut Context) { goto_ts_object_impl(cx, "parameter", Direction::Backward) } fn goto_next_comment(cx: &mut Context) { goto_ts_object_impl(cx, "comment", Direction::Forward) } fn goto_prev_comment(cx: &mut Context) { goto_ts_object_impl(cx, "comment", Direction::Backward) } fn goto_next_test(cx: &mut Context) { goto_ts_object_impl(cx, "test", Direction::Forward) } fn goto_prev_test(cx: &mut Context) { goto_ts_object_impl(cx, "test", Direction::Backward) } fn select_textobject_around(cx: &mut Context) { select_textobject(cx, textobject::TextObject::Around); } fn select_textobject_inner(cx: &mut Context) { select_textobject(cx, textobject::TextObject::Inside); } fn select_textobject(cx: &mut Context, objtype: textobject::TextObject) { let count = cx.count(); cx.on_next_key(move |cx, event| { cx.editor.autoinfo = None; if let Some(ch) = event.char() { let textobject = move |editor: &mut Editor| { let (view, doc) = current!(editor); let text = doc.text().slice(..); let textobject_treesitter = |obj_name: &str, range: Range| -> Range { let (lang_config, syntax) = match doc.language_config().zip(doc.syntax()) { Some(t) => t, None => return range, }; textobject::textobject_treesitter( text, range, objtype, obj_name, syntax.tree().root_node(), lang_config, count, ) }; if ch == 'g' && doc.diff_handle().is_none() { editor.set_status("Diff is not available in current buffer"); return; } let textobject_change = |range: Range| -> Range { let diff_handle = doc.diff_handle().unwrap(); let diff = diff_handle.load(); let line = range.cursor_line(text); let hunk_idx = if let Some(hunk_idx) = diff.hunk_at(line as u32, false) { hunk_idx } else { return range; }; let hunk = diff.nth_hunk(hunk_idx).after; let start = text.line_to_char(hunk.start as usize); let end = text.line_to_char(hunk.end as usize); Range::new(start, end).with_direction(range.direction()) }; let selection = doc.selection(view.id).clone().transform(|range| { match ch { 'w' => textobject::textobject_word(text, range, objtype, count, false), 'W' => textobject::textobject_word(text, range, objtype, count, true), 't' => textobject_treesitter("class", range), 'f' => textobject_treesitter("function", range), 'a' => textobject_treesitter("parameter", range), 'c' => textobject_treesitter("comment", range), 'T' => textobject_treesitter("test", range), 'p' => textobject::textobject_paragraph(text, range, objtype, count), 'm' => textobject::textobject_pair_surround_closest( text, range, objtype, count, ), 'g' => textobject_change(range), // TODO: cancel new ranges if inconsistent surround matches across lines ch if !ch.is_ascii_alphanumeric() => { textobject::textobject_pair_surround(text, range, objtype, ch, count) } _ => range, } }); doc.set_selection(view.id, selection); }; cx.editor.apply_motion(textobject); } }); let title = match objtype { textobject::TextObject::Inside => "Match inside", textobject::TextObject::Around => "Match around", _ => return, }; let help_text = [ ("w", "Word"), ("W", "WORD"), ("p", "Paragraph"), ("t", "Type definition (tree-sitter)"), ("f", "Function (tree-sitter)"), ("a", "Argument/parameter (tree-sitter)"), ("c", "Comment (tree-sitter)"), ("T", "Test (tree-sitter)"), ("m", "Closest surrounding pair"), (" ", "... or any character acting as a pair"), ]; cx.editor.autoinfo = Some(Info::new(title, &help_text)); } fn surround_add(cx: &mut Context) { cx.on_next_key(move |cx, event| { let (view, doc) = current!(cx.editor); // surround_len is the number of new characters being added. let (open, close, surround_len) = match event.char() { Some(ch) => { let (o, c) = surround::get_pair(ch); let mut open = Tendril::new(); open.push(o); let mut close = Tendril::new(); close.push(c); (open, close, 2) } None if event.code == KeyCode::Enter => ( doc.line_ending.as_str().into(), doc.line_ending.as_str().into(), 2 * doc.line_ending.len_chars(), ), None => return, }; let selection = doc.selection(view.id); let mut changes = Vec::with_capacity(selection.len() * 2); let mut ranges = SmallVec::with_capacity(selection.len()); let mut offs = 0; for range in selection.iter() { changes.push((range.from(), range.from(), Some(open.clone()))); changes.push((range.to(), range.to(), Some(close.clone()))); ranges.push( Range::new(offs + range.from(), offs + range.to() + surround_len) .with_direction(range.direction()), ); offs += surround_len; } let transaction = Transaction::change(doc.text(), changes.into_iter()) .with_selection(Selection::new(ranges, selection.primary_index())); doc.apply(&transaction, view.id); exit_select_mode(cx); }) } fn surround_replace(cx: &mut Context) { let count = cx.count(); cx.on_next_key(move |cx, event| { let surround_ch = match event.char() { Some('m') => None, // m selects the closest surround pair Some(ch) => Some(ch), None => return, }; let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id); let change_pos = match surround::get_surround_pos(text, selection, surround_ch, count) { Ok(c) => c, Err(err) => { cx.editor.set_error(err.to_string()); return; } }; let selection = selection.clone(); let ranges: SmallVec<[Range; 1]> = change_pos.iter().map(|&p| Range::point(p)).collect(); doc.set_selection( view.id, Selection::new(ranges, selection.primary_index() * 2), ); cx.on_next_key(move |cx, event| { let (view, doc) = current!(cx.editor); let to = match event.char() { Some(to) => to, None => return doc.set_selection(view.id, selection), }; let (open, close) = surround::get_pair(to); // the changeset has to be sorted to allow nested surrounds let mut sorted_pos: Vec<(usize, char)> = Vec::new(); for p in change_pos.chunks(2) { sorted_pos.push((p[0], open)); sorted_pos.push((p[1], close)); } sorted_pos.sort_unstable(); let transaction = Transaction::change( doc.text(), sorted_pos.iter().map(|&pos| { let mut t = Tendril::new(); t.push(pos.1); (pos.0, pos.0 + 1, Some(t)) }), ); doc.set_selection(view.id, selection); doc.apply(&transaction, view.id); exit_select_mode(cx); }); }) } fn surround_delete(cx: &mut Context) { let count = cx.count(); cx.on_next_key(move |cx, event| { let surround_ch = match event.char() { Some('m') => None, // m selects the closest surround pair Some(ch) => Some(ch), None => return, }; let (view, doc) = current!(cx.editor); let text = doc.text().slice(..); let selection = doc.selection(view.id); let mut change_pos = match surround::get_surround_pos(text, selection, surround_ch, count) { Ok(c) => c, Err(err) => { cx.editor.set_error(err.to_string()); return; } }; change_pos.sort_unstable(); // the changeset has to be sorted to allow nested surrounds let transaction = Transaction::change(doc.text(), change_pos.into_iter().map(|p| (p, p + 1, None))); doc.apply(&transaction, view.id); exit_select_mode(cx); }) } #[derive(Eq, PartialEq)] enum ShellBehavior { Replace, Ignore, Insert, Append, } fn shell_pipe(cx: &mut Context) { shell_prompt(cx, "pipe:".into(), ShellBehavior::Replace); } fn shell_pipe_to(cx: &mut Context) { shell_prompt(cx, "pipe-to:".into(), ShellBehavior::Ignore); } fn shell_insert_output(cx: &mut Context) { shell_prompt(cx, "insert-output:".into(), ShellBehavior::Insert); } fn shell_append_output(cx: &mut Context) { shell_prompt(cx, "append-output:".into(), ShellBehavior::Append); } fn shell_keep_pipe(cx: &mut Context) { ui::prompt( cx, "keep-pipe:".into(), Some('|'), ui::completers::none, move |cx, input: &str, event: PromptEvent| { let shell = &cx.editor.config().shell; if event != PromptEvent::Validate { return; } if input.is_empty() { return; } let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id); let mut ranges = SmallVec::with_capacity(selection.len()); let old_index = selection.primary_index(); let mut index: Option = None; let text = doc.text().slice(..); for (i, range) in selection.ranges().iter().enumerate() { let fragment = range.slice(text); if let Err(err) = shell_impl(shell, input, Some(fragment.into())) { log::debug!("Shell command failed: {}", err); } else { ranges.push(*range); if i >= old_index && index.is_none() { index = Some(ranges.len() - 1); } } } if ranges.is_empty() { cx.editor.set_error("No selections remaining"); return; } let index = index.unwrap_or_else(|| ranges.len() - 1); doc.set_selection(view.id, Selection::new(ranges, index)); }, ); } fn shell_impl(shell: &[String], cmd: &str, input: Option) -> anyhow::Result { tokio::task::block_in_place(|| helix_lsp::block_on(shell_impl_async(shell, cmd, input))) } async fn shell_impl_async( shell: &[String], cmd: &str, input: Option, ) -> anyhow::Result { use std::process::Stdio; use tokio::process::Command; ensure!(!shell.is_empty(), "No shell set"); let mut process = Command::new(&shell[0]); process .args(&shell[1..]) .arg(cmd) .stdout(Stdio::piped()) .stderr(Stdio::piped()); if input.is_some() || cfg!(windows) { process.stdin(Stdio::piped()); } else { process.stdin(Stdio::null()); } let mut process = match process.spawn() { Ok(process) => process, Err(e) => { log::error!("Failed to start shell: {}", e); return Err(e.into()); } }; let output = if let Some(mut stdin) = process.stdin.take() { let input_task = tokio::spawn(async move { if let Some(input) = input { helix_view::document::to_writer(&mut stdin, (encoding::UTF_8, false), &input) .await?; } anyhow::Ok(()) }); let (output, _) = tokio::join! { process.wait_with_output(), input_task, }; output? } else { // Process has no stdin, so we just take the output process.wait_with_output().await? }; if !output.status.success() { if !output.stderr.is_empty() { let err = String::from_utf8_lossy(&output.stderr).to_string(); log::error!("Shell error: {}", err); bail!("Shell error: {}", err); } match output.status.code() { Some(exit_code) => bail!("Shell command failed: status {}", exit_code), None => bail!("Shell command failed"), } } else if !output.stderr.is_empty() { log::debug!( "Command printed to stderr: {}", String::from_utf8_lossy(&output.stderr).to_string() ); } let str = std::str::from_utf8(&output.stdout) .map_err(|_| anyhow!("Process did not output valid UTF-8"))?; let tendril = Tendril::from(str); Ok(tendril) } fn shell(cx: &mut compositor::Context, cmd: &str, behavior: &ShellBehavior) { let pipe = match behavior { ShellBehavior::Replace | ShellBehavior::Ignore => true, ShellBehavior::Insert | ShellBehavior::Append => false, }; let config = cx.editor.config(); let shell = &config.shell; let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id); let mut changes = Vec::with_capacity(selection.len()); let mut ranges = SmallVec::with_capacity(selection.len()); let text = doc.text().slice(..); let mut shell_output: Option = None; let mut offset = 0isize; for range in selection.ranges() { let output = if let Some(output) = shell_output.as_ref() { output.clone() } else { let fragment = range.slice(text); match shell_impl(shell, cmd, pipe.then(|| fragment.into())) { Ok(result) => { if !pipe { shell_output = Some(result.clone()); } result } Err(err) => { cx.editor.set_error(err.to_string()); return; } } }; let output_len = output.chars().count(); let (from, to, deleted_len) = match behavior { ShellBehavior::Replace => (range.from(), range.to(), range.len()), ShellBehavior::Insert => (range.from(), range.from(), 0), ShellBehavior::Append => (range.to(), range.to(), 0), _ => (range.from(), range.from(), 0), }; // These `usize`s cannot underflow because selection ranges cannot overlap. let anchor = to .checked_add_signed(offset) .expect("Selection ranges cannot overlap") .checked_sub(deleted_len) .expect("Selection ranges cannot overlap"); let new_range = Range::new(anchor, anchor + output_len).with_direction(range.direction()); ranges.push(new_range); offset = offset .checked_add_unsigned(output_len) .expect("Selection ranges cannot overlap") .checked_sub_unsigned(deleted_len) .expect("Selection ranges cannot overlap"); changes.push((from, to, Some(output))); } if behavior != &ShellBehavior::Ignore { let transaction = Transaction::change(doc.text(), changes.into_iter()) .with_selection(Selection::new(ranges, selection.primary_index())); doc.apply(&transaction, view.id); doc.append_changes_to_history(view); } // after replace cursor may be out of bounds, do this to // make sure cursor is in view and update scroll as well view.ensure_cursor_in_view(doc, config.scrolloff); } fn shell_prompt(cx: &mut Context, prompt: Cow<'static, str>, behavior: ShellBehavior) { ui::prompt( cx, prompt, Some('|'), ui::completers::filename, move |cx, input: &str, event: PromptEvent| { if event != PromptEvent::Validate { return; } if input.is_empty() { return; } shell(cx, input, &behavior); }, ); } fn suspend(_cx: &mut Context) { #[cfg(not(windows))] signal_hook::low_level::raise(signal_hook::consts::signal::SIGTSTP).unwrap(); } fn add_newline_above(cx: &mut Context) { add_newline_impl(cx, Open::Above); } fn add_newline_below(cx: &mut Context) { add_newline_impl(cx, Open::Below) } fn add_newline_impl(cx: &mut Context, open: Open) { let count = cx.count(); let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id); let text = doc.text(); let slice = text.slice(..); let changes = selection.into_iter().map(|range| { let (start, end) = range.line_range(slice); let line = match open { Open::Above => start, Open::Below => end + 1, }; let pos = text.line_to_char(line); ( pos, pos, Some(doc.line_ending.as_str().repeat(count).into()), ) }); let transaction = Transaction::change(text, changes); doc.apply(&transaction, view.id); } #[derive(Debug, PartialEq, Eq)] pub enum MoveSelection { Below, Above, } #[derive(Clone)] struct ExtendedChange { line_start: usize, line_end: usize, line_text: Option, line_selection: Option<(usize, usize)>, } /// Move line or block of text in specified direction. /// The function respects single line, single selection, multiple lines using /// several cursors and multiple selections. fn move_selection(cx: &mut Context, direction: MoveSelection) { let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id); let text = doc.text(); let slice = text.slice(..); let mut last_step_changes: Vec = vec![]; let mut at_doc_edge = false; let all_changes = selection.into_iter().map(|range| { let (start, end) = range.line_range(slice); let line_start = text.line_to_char(start); let line_end = line_end_char_index(&slice, end); let line_text = text.slice(line_start..line_end).to_string(); let next_line = match direction { MoveSelection::Above => start.saturating_sub(1), MoveSelection::Below => end + 1, }; let rel_pos_anchor = range.anchor - line_start; let rel_pos_head = range.head - line_start; let cursor_rel_pos = (rel_pos_anchor, rel_pos_head); if next_line == start || next_line >= text.len_lines() || at_doc_edge { at_doc_edge = true; let changes = vec![ExtendedChange { line_start, line_end, line_text: Some(line_text.into()), line_selection: Some(cursor_rel_pos), }]; last_step_changes = changes.clone(); changes } else { let next_line_start = text.line_to_char(next_line); let next_line_end = line_end_char_index(&slice, next_line); let next_line_text = text.slice(next_line_start..next_line_end).to_string(); let changes = match direction { MoveSelection::Above => vec![ ExtendedChange { line_start: next_line_start, line_end: next_line_end, line_text: Some(line_text.into()), line_selection: Some(cursor_rel_pos), }, ExtendedChange { line_start, line_end, line_text: Some(next_line_text.into()), line_selection: None, }, ], MoveSelection::Below => vec![ ExtendedChange { line_start, line_end, line_text: Some(next_line_text.into()), line_selection: None, }, ExtendedChange { line_start: next_line_start, line_end: next_line_end, line_text: Some(line_text.into()), line_selection: Some(cursor_rel_pos), }, ], }; let changes = if last_step_changes.len() > 1 { evaluate_changes(last_step_changes.clone(), changes, &direction) } else { changes }; last_step_changes = changes.clone(); changes } }); /// Merge changes from subsequent cursors fn evaluate_changes( mut last_changes: Vec, current_changes: Vec, direction: &MoveSelection, ) -> Vec { let mut current_it = current_changes.into_iter(); if let (Some(mut last), Some(mut current_first), Some(current_last)) = (last_changes.pop(), current_it.next(), current_it.next()) { if last.line_start == current_first.line_start { match direction { MoveSelection::Above => { last.line_start = current_last.line_start; last.line_end = current_last.line_end; if let Some(first) = last_changes.pop() { last_changes.push(first) } last_changes.extend(vec![current_first, last]); last_changes } MoveSelection::Below => { current_first.line_start = last_changes[0].line_start; current_first.line_end = last_changes[0].line_end; last_changes[0] = current_first; last_changes.extend(vec![last, current_last]); last_changes } } } else { if let Some(first) = last_changes.pop() { last_changes.push(first) } last_changes.extend(vec![last, current_first, current_last]); last_changes } } else { last_changes } } let mut flattened: Vec> = all_changes.into_iter().collect(); let last_changes = flattened.pop().unwrap_or_default(); let acc_cursors = get_adjusted_selection(doc, &last_changes, direction, at_doc_edge); let changes = last_changes .into_iter() .map(|change| (change.line_start, change.line_end, change.line_text)); let new_sel = Selection::new(acc_cursors.into(), 0); let transaction = Transaction::change(doc.text(), changes); doc.apply(&transaction, view.id); doc.set_selection(view.id, new_sel); } /// Returns selection range that is valid for the updated document /// This logic is necessary because it's not possible to apply changes /// to the document first and then set selection. fn get_adjusted_selection( doc: &Document, last_changes: &[ExtendedChange], direction: MoveSelection, at_doc_edge: bool, ) -> Vec { let mut first_change_len = 0; let mut next_start = 0; let mut acc_cursors: Vec = vec![]; for change in last_changes.iter() { let change_len = change.line_text.as_ref().map_or(0, |x| x.chars().count()); if let Some((rel_anchor, rel_head)) = change.line_selection { let (anchor, head) = if at_doc_edge { let anchor = change.line_start + rel_anchor; let head = change.line_start + rel_head; (anchor, head) } else { match direction { MoveSelection::Above => { if next_start == 0 { next_start = change.line_start; } let anchor = next_start + rel_anchor; let head = next_start + rel_head; // If there is next cursor below, selection position should be adjusted // according to the length of the current line. next_start += change_len + doc.line_ending.len_chars(); (anchor, head) } MoveSelection::Below => { let anchor = change.line_start + first_change_len + rel_anchor - change_len; let head = change.line_start + first_change_len + rel_head - change_len; (anchor, head) } } }; let cursor = Range::new(anchor, head); if let Some(last) = acc_cursors.pop() { if cursor.overlaps(&last) { acc_cursors.push(last); } else { acc_cursors.push(last); acc_cursors.push(cursor); }; } else { acc_cursors.push(cursor); }; } else { first_change_len = change.line_text.as_ref().map_or(0, |x| x.chars().count()); next_start = 0; }; } acc_cursors } fn move_selection_below(cx: &mut Context) { move_selection(cx, MoveSelection::Below) } fn move_selection_above(cx: &mut Context) { move_selection(cx, MoveSelection::Above) } enum IncrementDirection { Increase, Decrease, } /// Increment objects within selections by count. fn increment(cx: &mut Context) { increment_impl(cx, IncrementDirection::Increase); } /// Decrement objects within selections by count. fn decrement(cx: &mut Context) { increment_impl(cx, IncrementDirection::Decrease); } /// Increment objects within selections by `amount`. /// A negative `amount` will decrement objects within selections. fn increment_impl(cx: &mut Context, increment_direction: IncrementDirection) { let sign = match increment_direction { IncrementDirection::Increase => 1, IncrementDirection::Decrease => -1, }; let mut amount = sign * cx.count() as i64; // If the register is `#` then increase or decrease the `amount` by 1 per element let increase_by = if cx.register == Some('#') { sign } else { 0 }; let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id); let text = doc.text().slice(..); let mut new_selection_ranges = SmallVec::new(); let mut cumulative_length_diff: i128 = 0; let mut changes = vec![]; for range in selection { let selected_text: Cow = range.fragment(text); let new_from = ((range.from() as i128) + cumulative_length_diff) as usize; let incremented = [increment::integer, increment::date_time] .iter() .find_map(|incrementor| incrementor(selected_text.as_ref(), amount)); amount += increase_by; match incremented { None => { let new_range = Range::new( new_from, (range.to() as i128 + cumulative_length_diff) as usize, ); new_selection_ranges.push(new_range); } Some(new_text) => { let new_range = Range::new(new_from, new_from + new_text.len()); cumulative_length_diff += new_text.len() as i128 - selected_text.len() as i128; new_selection_ranges.push(new_range); changes.push((range.from(), range.to(), Some(new_text.into()))); } } } if !changes.is_empty() { let new_selection = Selection::new(new_selection_ranges, selection.primary_index()); let transaction = Transaction::change(doc.text(), changes.into_iter()); let transaction = transaction.with_selection(new_selection); doc.apply(&transaction, view.id); exit_select_mode(cx); } } fn record_macro(cx: &mut Context) { if let Some((reg, mut keys)) = cx.editor.macro_recording.take() { // Remove the keypress which ends the recording keys.pop(); let s = keys .into_iter() .map(|key| { let s = key.to_string(); if s.chars().count() == 1 { s } else { format!("<{}>", s) } }) .collect::(); match cx.editor.registers.write(reg, vec![s]) { Ok(_) => cx .editor .set_status(format!("Recorded to register [{}]", reg)), Err(err) => cx.editor.set_error(err.to_string()), } } else { let reg = cx.register.take().unwrap_or('@'); cx.editor.macro_recording = Some((reg, Vec::new())); cx.editor .set_status(format!("Recording to register [{}]", reg)); } } fn replay_macro(cx: &mut Context) { let reg = cx.register.unwrap_or('@'); if cx.editor.macro_replaying.contains(®) { cx.editor.set_error(format!( "Cannot replay from register [{}] because already replaying from same register", reg )); return; } let keys: Vec = if let Some(keys) = cx .editor .registers .read(reg, cx.editor) .filter(|values| values.len() == 1) .map(|mut values| values.next().unwrap()) { match helix_view::input::parse_macro(&keys) { Ok(keys) => keys, Err(err) => { cx.editor.set_error(format!("Invalid macro: {}", err)); return; } } } else { cx.editor.set_error(format!("Register [{}] empty", reg)); return; }; // Once the macro has been fully validated, it's marked as being under replay // to ensure we don't fall into infinite recursion. cx.editor.macro_replaying.push(reg); let count = cx.count(); cx.callback.push(Box::new(move |compositor, cx| { for _ in 0..count { for &key in keys.iter() { compositor.handle_event(&compositor::Event::Key(key), cx); } } // The macro under replay is cleared at the end of the callback, not in the // macro replay context, or it will not correctly protect the user from // replaying recursively. cx.editor.macro_replaying.pop(); })); } fn goto_word(cx: &mut Context) { jump_to_word(cx, Movement::Move) } fn extend_to_word(cx: &mut Context) { jump_to_word(cx, Movement::Extend) } fn jump_to_label(cx: &mut Context, labels: Vec, behaviour: Movement) { let doc = doc!(cx.editor); let alphabet = &cx.editor.config().jump_label_alphabet; if labels.is_empty() { return; } let alphabet_char = |i| { let mut res = Tendril::new(); res.push(alphabet[i]); res }; // Add label for each jump candidate to the View as virtual text. let text = doc.text().slice(..); let mut overlays: Vec<_> = labels .iter() .enumerate() .flat_map(|(i, range)| { [ Overlay::new(range.from(), alphabet_char(i / alphabet.len())), Overlay::new( graphemes::next_grapheme_boundary(text, range.from()), alphabet_char(i % alphabet.len()), ), ] }) .collect(); overlays.sort_unstable_by_key(|overlay| overlay.char_idx); let (view, doc) = current!(cx.editor); doc.set_jump_labels(view.id, overlays); // Accept two characters matching a visible label. Jump to the candidate // for that label if it exists. let primary_selection = doc.selection(view.id).primary(); let view = view.id; let doc = doc.id(); cx.on_next_key(move |cx, event| { let alphabet = &cx.editor.config().jump_label_alphabet; let Some(i ) = event.char().and_then(|ch| alphabet.iter().position(|&it| it == ch)) else { doc_mut!(cx.editor, &doc).remove_jump_labels(view); return; }; let outer = i * alphabet.len(); // Bail if the given character cannot be a jump label. if outer > labels.len() { doc_mut!(cx.editor, &doc).remove_jump_labels(view); return; } cx.on_next_key(move |cx, event| { doc_mut!(cx.editor, &doc).remove_jump_labels(view); let alphabet = &cx.editor.config().jump_label_alphabet; let Some(inner ) = event.char().and_then(|ch| alphabet.iter().position(|&it| it == ch)) else { return; }; if let Some(mut range) = labels.get(outer + inner).copied() { range = if behaviour == Movement::Extend { let anchor = if range.anchor < range.head { let from = primary_selection.from(); if range.anchor < from { range.anchor } else { from } } else { let to = primary_selection.to(); if range.anchor > to { range.anchor } else { to } }; Range::new(anchor, range.head) }else{ range.with_direction(Direction::Forward) }; doc_mut!(cx.editor, &doc).set_selection(view, range.into()); } }); }); } fn jump_to_word(cx: &mut Context, behaviour: Movement) { // Calculate the jump candidates: ranges for any visible words with two or // more characters. let alphabet = &cx.editor.config().jump_label_alphabet; let jump_label_limit = alphabet.len() * alphabet.len(); let mut words = Vec::with_capacity(jump_label_limit); let (view, doc) = current_ref!(cx.editor); let text = doc.text().slice(..); // This is not necessarily exact if there is virtual text like soft wrap. // It's ok though because the extra jump labels will not be rendered. let start = text.line_to_char(text.char_to_line(view.offset.anchor)); let end = text.line_to_char(view.estimate_last_doc_line(doc) + 1); let primary_selection = doc.selection(view.id).primary(); let cursor = primary_selection.cursor(text); let mut cursor_fwd = Range::point(cursor); let mut cursor_rev = Range::point(cursor); if text.get_char(cursor).is_some_and(|c| !c.is_whitespace()) { let cursor_word_end = movement::move_next_word_end(text, cursor_fwd, 1); // single grapheme words need a specical case if cursor_word_end.anchor == cursor { cursor_fwd = cursor_word_end; } let cursor_word_start = movement::move_prev_word_start(text, cursor_rev, 1); if cursor_word_start.anchor == next_grapheme_boundary(text, cursor) { cursor_rev = cursor_word_start; } } 'outer: loop { let mut changed = false; while cursor_fwd.head < end { cursor_fwd = movement::move_next_word_end(text, cursor_fwd, 1); // The cursor is on a word that is atleast two graphemes long and // madeup of word characters. The latter condition is needed because // move_next_word_end simply treats a sequence of characters from // the same char class as a word so `=<` would also count as a word. let add_label = RevRopeGraphemes::new(text.slice(..cursor_fwd.head)) .take(2) .take_while(|g| g.chars().all(char_is_word)) .count() == 2; if !add_label { continue; } changed = true; // skip any leading whitespace cursor_fwd.anchor += text .chars_at(cursor_fwd.anchor) .take_while(|&c| !char_is_word(c)) .count(); words.push(cursor_fwd); if words.len() == jump_label_limit { break 'outer; } break; } while cursor_rev.head > start { cursor_rev = movement::move_prev_word_start(text, cursor_rev, 1); // The cursor is on a word that is atleast two graphemes long and // madeup of word characters. The latter condition is needed because // move_prev_word_start simply treats a sequence of characters from // the same char class as a word so `=<` would also count as a word. let add_label = RopeGraphemes::new(text.slice(cursor_rev.head..)) .take(2) .take_while(|g| g.chars().all(char_is_word)) .count() == 2; if !add_label { continue; } changed = true; cursor_rev.anchor -= text .chars_at(cursor_rev.anchor) .reversed() .take_while(|&c| !char_is_word(c)) .count(); words.push(cursor_rev); if words.len() == jump_label_limit { break 'outer; } break; } if !changed { break; } } jump_to_label(cx, words, behaviour) } fn insert_digraph(cx: &mut Context) { ui::prompt( cx, "digraph:".into(), Some('K'), // todo: decide on register to use move |editor, input| { editor .config() .digraphs .search(input) .take(10) .map(|entry| { // todo: Prompt does not currently allow additional text as part // of it's suggestions. Show the user the symbol and description // once prompt has been made more robust #[allow(clippy::useless_format)] ((0..), Cow::from(format!("{}", entry.sequence))) }) .collect() }, move |cx, input, event| { match event { PromptEvent::Validate => (), _ => return, } let config = cx.editor.config(); let symbols = if let Some(entry) = config.digraphs.get(input) { &entry.symbols } else { cx.editor.set_error("Digraph not found"); return; }; let (view, doc) = current!(cx.editor); let selection = doc.selection(view.id); let mut changes = Vec::with_capacity(selection.len()); for range in selection.ranges() { changes.push((range.from(), range.from(), Some(symbols.clone().into()))); } let trans = Transaction::change(doc.text(), changes.into_iter()); doc.apply(&trans, view.id); doc.append_changes_to_history(view); }, ) }