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authorBlaž Hrastnik2020-10-07 05:06:25 +0000
committerGitHub2020-10-07 05:06:25 +0000
commit6848702b1f09dc1a4e8d2e3067d3b45b3421d403 (patch)
tree18cc823d2a5dfd0b09b5802f6eb11c978080df36
parentb7e1c0cf8253703a5eeb8453de23c8d0a6137ef1 (diff)
parent7f07e6676801be72e5a58b5612893c7d16f94a64 (diff)
Merge pull request #3 from helix-editor/goto-implementation
Goto mode implementation
-rw-r--r--Cargo.lock1
-rw-r--r--helix-core/src/state.rs4
-rw-r--r--helix-core/src/syntax.rs2
-rw-r--r--helix-term/src/editor.rs22
-rw-r--r--helix-term/test.txt1000
-rw-r--r--helix-view/src/commands.rs74
-rw-r--r--helix-view/src/keymap.rs28
-rw-r--r--helix-view/src/view.rs22
8 files changed, 1133 insertions, 20 deletions
diff --git a/Cargo.lock b/Cargo.lock
index 7253b7fd..68870ef6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -225,6 +225,7 @@ checksum = "4bd1061998a501ee7d4b6d449020df3266ca3124b941ec56cf2005c3779ca142"
dependencies = [
"bitflags",
"indexmap",
+ "lazy_static",
"os_str_bytes",
"textwrap",
"unicode-width",
diff --git a/helix-core/src/state.rs b/helix-core/src/state.rs
index 36ca221c..047ff83d 100644
--- a/helix-core/src/state.rs
+++ b/helix-core/src/state.rs
@@ -9,6 +9,7 @@ use std::path::PathBuf;
pub enum Mode {
Normal,
Insert,
+ Goto,
}
/// A state represents the current editor state of a single buffer.
@@ -287,9 +288,6 @@ impl State {
}
}
-/// Coordinates are a 0-indexed line and column pair.
-pub type Coords = (usize, usize); // line, col
-
/// Convert a character index to (line, column) coordinates.
pub fn coords_at_pos(text: &RopeSlice, pos: usize) -> Position {
let line = text.char_to_line(pos);
diff --git a/helix-core/src/syntax.rs b/helix-core/src/syntax.rs
index 638ec8ee..3e5927e5 100644
--- a/helix-core/src/syntax.rs
+++ b/helix-core/src/syntax.rs
@@ -312,7 +312,7 @@ pub struct LanguageLayer {
tree: Option<Tree>,
}
-use crate::state::{coords_at_pos, Coords};
+use crate::state::coords_at_pos;
use crate::transaction::{ChangeSet, Operation};
use crate::Tendril;
diff --git a/helix-term/src/editor.rs b/helix-term/src/editor.rs
index 70b5758e..09d66c5a 100644
--- a/helix-term/src/editor.rs
+++ b/helix-term/src/editor.rs
@@ -87,7 +87,7 @@ impl Editor {
// TODO: inefficient, should feed chunks.iter() to tree_sitter.parse_with(|offset, pos|)
let source_code = view.state.doc().to_string();
- let last_line = view.last_line(viewport);
+ let last_line = view.last_line();
let range = {
// calculate viewport byte ranges
@@ -219,7 +219,7 @@ impl Editor {
}
let style: Style = view.theme.get("ui.linenr");
- for (i, line) in (view.first_line..(last_line as u16)).enumerate() {
+ for (i, line) in (view.first_line..last_line).enumerate() {
self.surface
.set_stringn(0, i as u16, format!("{:>5}", line + 1), 5, style);
// lavender
@@ -254,6 +254,7 @@ impl Editor {
let mode = match view.state.mode() {
Mode::Insert => "INS",
Mode::Normal => "NOR",
+ Mode::Goto => "GOTO",
};
self.surface.set_style(
Rect::new(0, self.size.1 - 1, self.size.0, 1),
@@ -278,13 +279,14 @@ impl Editor {
match view.state.mode() {
Mode::Insert => write!(stdout, "\x1B[6 q"),
Mode::Normal => write!(stdout, "\x1B[2 q"),
+ Mode::Goto => write!(stdout, "\x1B[2 q"),
};
// render the cursor
let pos = view.state.selection().cursor();
let pos = view
- .screen_coords_at_pos(&view.state.doc().slice(..), pos, area)
+ .screen_coords_at_pos(&view.state.doc().slice(..), pos)
.expect("Cursor is out of bounds.");
execute!(
@@ -326,6 +328,7 @@ impl Editor {
}))) => {
break;
}
+
Some(Ok(Event::Key(event))) => {
if let Some(view) = &mut self.view {
match view.state.mode() {
@@ -359,6 +362,19 @@ impl Editor {
self.render();
}
}
+ Mode::Goto => {
+ // TODO: handle modes and sequences (`gg`)
+ let keys = vec![event];
+ if let Some(command) = keymap[&Mode::Goto].get(&keys) {
+ // TODO: handle count other than 1
+ command(view, 1);
+
+ // TODO: simplistic ensure cursor in view for now
+ view.ensure_cursor_in_view();
+
+ self.render();
+ }
+ }
}
}
}
diff --git a/helix-term/test.txt b/helix-term/test.txt
new file mode 100644
index 00000000..11798245
--- /dev/null
+++ b/helix-term/test.txt
@@ -0,0 +1,1000 @@
+1
+2
+3
+4
+5
+6
+7
+8
+9
+10
+11
+12
+13
+14
+15
+16
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+20
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+82
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diff --git a/helix-view/src/commands.rs b/helix-view/src/commands.rs
index 6dd1101c..19853c37 100644
--- a/helix-view/src/commands.rs
+++ b/helix-view/src/commands.rs
@@ -13,6 +13,8 @@ use crate::view::View;
/// state (usually by creating and applying a transaction).
pub type Command = fn(view: &mut View, count: usize);
+const PADDING: usize = 5;
+
pub fn move_char_left(view: &mut View, count: usize) {
// TODO: use a transaction
let selection = view
@@ -117,6 +119,74 @@ pub fn move_next_word_end(view: &mut View, count: usize) {
view.state.selection = Selection::single(pos, pos);
}
+pub fn move_file_start(view: &mut View, _count: usize) {
+ // TODO: use a transaction
+ view.state.selection = Selection::single(0, 0);
+
+ view.state.mode = Mode::Normal;
+}
+
+pub fn move_file_end(view: &mut View, _count: usize) {
+ // TODO: use a transaction
+ let text = &view.state.doc;
+ let last_line = text.line_to_char(text.len_lines().saturating_sub(2));
+ view.state.selection = Selection::single(last_line, last_line);
+
+ view.state.mode = Mode::Normal;
+}
+
+pub fn check_cursor_in_view(view: &mut View) -> bool {
+ let cursor = view.state.selection().cursor();
+ let line = view.state.doc().char_to_line(cursor);
+ let document_end = view.first_line + view.size.1.saturating_sub(1) as usize;
+
+ if (line > document_end.saturating_sub(PADDING)) | (line < view.first_line + PADDING) {
+ return false;
+ }
+ true
+}
+
+pub fn page_up(view: &mut View, _count: usize) {
+ view.first_line = view.first_line.saturating_sub(view.size.1 as usize);
+
+ if !check_cursor_in_view(view) {
+ let text = view.state.doc();
+ let pos = text.line_to_char(view.last_line().saturating_sub(PADDING as usize));
+ view.state.selection = Selection::single(pos, pos);
+ }
+}
+
+pub fn page_down(view: &mut View, _count: usize) {
+ view.first_line += view.size.1 as usize + PADDING;
+
+ if view.first_line < view.state.doc().len_lines() {
+ let text = view.state.doc();
+ let pos = text.line_to_char(view.first_line as usize);
+ view.state.selection = Selection::single(pos, pos);
+ }
+}
+
+pub fn half_page_up(view: &mut View, _count: usize) {
+ view.first_line = view.first_line.saturating_sub(view.size.1 as usize / 2);
+
+ if !check_cursor_in_view(view) {
+ let text = &view.state.doc;
+ let pos = text.line_to_char(view.last_line() - PADDING as usize);
+ view.state.selection = Selection::single(pos, pos);
+ }
+}
+
+pub fn half_page_down(view: &mut View, _count: usize) {
+ let lines = view.state.doc().len_lines();
+ if view.first_line < lines.saturating_sub(view.size.1 as usize) {
+ view.first_line += view.size.1 as usize / 2;
+ }
+ if !check_cursor_in_view(view) {
+ let text = view.state.doc();
+ let pos = text.line_to_char(view.first_line as usize);
+ view.state.selection = Selection::single(pos, pos);
+ }
+}
// avoid select by default by having a visual mode switch that makes movements into selects
pub fn extend_char_left(view: &mut View, count: usize) {
@@ -292,6 +362,10 @@ pub fn normal_mode(view: &mut View, _count: usize) {
}
}
+pub fn goto_mode(view: &mut View, _count: usize) {
+ view.state.mode = Mode::Goto;
+}
+
// TODO: insert means add text just before cursor, on exit we should be on the last letter.
pub fn insert_char(view: &mut View, c: char) {
let c = Tendril::from_char(c);
diff --git a/helix-view/src/keymap.rs b/helix-view/src/keymap.rs
index ef23ff2a..72fc0e79 100644
--- a/helix-view/src/keymap.rs
+++ b/helix-view/src/keymap.rs
@@ -108,6 +108,15 @@ macro_rules! shift {
};
}
+macro_rules! ctrl {
+ ($ch:expr) => {
+ Key {
+ code: KeyCode::Char($ch),
+ modifiers: Modifiers::CONTROL,
+ }
+ };
+}
+
pub fn default() -> Keymaps {
hashmap!(
state::Mode::Normal =>
@@ -126,6 +135,7 @@ pub fn default() -> Keymaps {
vec![key!('w')] => commands::move_next_word_start,
vec![key!('b')] => commands::move_prev_word_start,
vec![key!('e')] => commands::move_next_word_end,
+ vec![key!('g')] => commands::goto_mode,
vec![key!('i')] => commands::insert_mode,
vec![shift!('I')] => commands::prepend_to_line,
vec![key!('a')] => commands::append_mode,
@@ -139,6 +149,16 @@ pub fn default() -> Keymaps {
code: KeyCode::Esc,
modifiers: Modifiers::NONE
}] => commands::normal_mode,
+ vec![Key {
+ code: KeyCode::PageUp,
+ modifiers: Modifiers::NONE
+ }] => commands::page_up,
+ vec![Key {
+ code: KeyCode::PageDown,
+ modifiers: Modifiers::NONE
+ }] => commands::page_down,
+ vec![ctrl!('u')] => commands::half_page_up,
+ vec![ctrl!('d')] => commands::half_page_down,
),
state::Mode::Insert => hashmap!(
vec![Key {
@@ -161,6 +181,14 @@ pub fn default() -> Keymaps {
code: KeyCode::Tab,
modifiers: Modifiers::NONE
}] => commands::insert_tab,
+ ),
+ state::Mode::Goto => hashmap!(
+ vec![Key {
+ code: KeyCode::Esc,
+ modifiers: Modifiers::NONE
+ }] => commands::normal_mode as Command,
+ vec![key!('g')] => commands::move_file_start as Command,
+ vec![key!('e')] => commands::move_file_end as Command,
)
)
}
diff --git a/helix-view/src/view.rs b/helix-view/src/view.rs
index 09cd4c65..887c45a2 100644
--- a/helix-view/src/view.rs
+++ b/helix-view/src/view.rs
@@ -11,7 +11,7 @@ use tui::layout::Rect;
pub struct View {
pub state: State,
- pub first_line: u16,
+ pub first_line: usize,
pub size: (u16, u16),
pub theme: Theme, // TODO: share one instance
}
@@ -33,10 +33,10 @@ impl View {
pub fn ensure_cursor_in_view(&mut self) {
let cursor = self.state.selection().cursor();
- let line = self.state.doc().char_to_line(cursor) as u16;
- let document_end = self.first_line + self.size.1.saturating_sub(1) - 1;
+ let line = self.state.doc().char_to_line(cursor);
+ let document_end = self.first_line + (self.size.1 as usize).saturating_sub(1);
- let padding = 5u16;
+ let padding = 5usize;
// TODO: side scroll
@@ -51,9 +51,10 @@ impl View {
/// Calculates the last visible line on screen
#[inline]
- pub fn last_line(&self, viewport: Rect) -> usize {
+ pub fn last_line(&self) -> usize {
+ let viewport = Rect::new(6, 0, self.size.0, self.size.1 - 1); // - 1 for statusline
std::cmp::min(
- (self.first_line + viewport.height) as usize,
+ self.first_line + (viewport.height as usize),
self.state.doc().len_lines() - 1,
)
}
@@ -61,15 +62,10 @@ impl View {
/// Translates a document position to an absolute position in the terminal.
/// Returns a (line, col) position if the position is visible on screen.
// TODO: Could return width as well for the character width at cursor.
- pub fn screen_coords_at_pos(
- &self,
- text: &RopeSlice,
- pos: usize,
- viewport: Rect,
- ) -> Option<Position> {
+ pub fn screen_coords_at_pos(&self, text: &RopeSlice, pos: usize) -> Option<Position> {
let line = text.char_to_line(pos);
- if line < self.first_line as usize || line > self.last_line(viewport) {
+ if line < self.first_line as usize || line > self.last_line() {
// Line is not visible on screen
return None;
}