diff options
Diffstat (limited to 'helix-core/src/indent.rs')
| -rw-r--r-- | helix-core/src/indent.rs | 143 |
1 files changed, 65 insertions, 78 deletions
diff --git a/helix-core/src/indent.rs b/helix-core/src/indent.rs index b6f5081a..1fc2b8a5 100644 --- a/helix-core/src/indent.rs +++ b/helix-core/src/indent.rs @@ -1,6 +1,5 @@ use crate::{ chars::{char_is_line_ending, char_is_whitespace}, - find_first_non_whitespace_char, syntax::{IndentQuery, LanguageConfiguration, Syntax}, tree_sitter::Node, Rope, RopeSlice, @@ -174,8 +173,7 @@ pub fn auto_detect_indent_style(document_text: &Rope) -> Option<IndentStyle> { /// To determine indentation of a newly inserted line, figure out the indentation at the last col /// of the previous line. -#[allow(dead_code)] -fn indent_level_for_line(line: RopeSlice, tab_width: usize) -> usize { +pub fn indent_level_for_line(line: RopeSlice, tab_width: usize) -> usize { let mut len = 0; for ch in line.chars() { match ch { @@ -210,10 +208,15 @@ fn get_highest_syntax_node_at_bytepos(syntax: &Syntax, pos: usize) -> Option<Nod Some(node) } -fn calculate_indentation(query: &IndentQuery, node: Option<Node>, newline: bool) -> usize { - // NOTE: can't use contains() on query because of comparing Vec<String> and &str - // https://doc.rust-lang.org/std/vec/struct.Vec.html#method.contains - +/// Calculate the indentation at a given treesitter node. +/// If newline is false, then any "indent" nodes on the line are ignored ("outdent" still applies). +/// This is because the indentation is only increased starting at the second line of the node. +fn calculate_indentation( + query: &IndentQuery, + node: Option<Node>, + line: usize, + newline: bool, +) -> usize { let mut increment: isize = 0; let mut node = match node { @@ -221,70 +224,45 @@ fn calculate_indentation(query: &IndentQuery, node: Option<Node>, newline: bool) None => return 0, }; - let mut prev_start = node.start_position().row; - - // if we're calculating indentation for a brand new line then the current node will become the - // parent node. We need to take it's indentation level into account too. - let node_kind = node.kind(); - if newline && query.indent.contains(node_kind) { - increment += 1; - } - - while let Some(parent) = node.parent() { - let parent_kind = parent.kind(); - let start = parent.start_position().row; - - // detect deeply nested indents in the same line - // .map(|a| { <-- ({ is two scopes - // let len = 1; <-- indents one level - // }) <-- }) is two scopes - let starts_same_line = start == prev_start; - - if query.outdent.contains(node.kind()) && !starts_same_line { - // we outdent by skipping the rules for the current level and jumping up - // node = parent; - increment -= 1; - // continue; + let mut current_line = line; + let mut consider_indent = newline; + let mut increment_from_line: isize = 0; + + loop { + let node_kind = node.kind(); + let start = node.start_position().row; + if current_line != start { + // Indent/dedent by at most one per line: + // .map(|a| { <-- ({ is two scopes + // let len = 1; <-- indents one level + // }) <-- }) is two scopes + if consider_indent || increment_from_line < 0 { + increment += increment_from_line.signum(); + } + increment_from_line = 0; + current_line = start; + consider_indent = true; } - if query.indent.contains(parent_kind) // && not_first_or_last_sibling - && !starts_same_line - { - // println!("is_scope {}", parent_kind); - prev_start = start; - increment += 1 + if query.outdent.contains(node_kind) { + increment_from_line -= 1; + } + if query.indent.contains(node_kind) { + increment_from_line += 1; } - // if last_scope && increment > 0 && ...{ ignore } - - node = parent; + if let Some(parent) = node.parent() { + node = parent; + } else { + break; + } + } + if consider_indent || increment_from_line < 0 { + increment += increment_from_line.signum(); } - increment.max(0) as usize } -#[allow(dead_code)] -fn suggested_indent_for_line( - language_config: &LanguageConfiguration, - syntax: Option<&Syntax>, - text: RopeSlice, - line_num: usize, - _tab_width: usize, -) -> usize { - if let Some(start) = find_first_non_whitespace_char(text.line(line_num)) { - return suggested_indent_for_pos( - Some(language_config), - syntax, - text, - start + text.line_to_char(line_num), - false, - ); - }; - - // if the line is blank, indent should be zero - 0 -} - // TODO: two usecases: if we are triggering this for a new, blank line: // - it should return 0 when mass indenting stuff // - it should look up the wrapper node and count it too when we press o/O @@ -293,23 +271,20 @@ pub fn suggested_indent_for_pos( syntax: Option<&Syntax>, text: RopeSlice, pos: usize, + line: usize, new_line: bool, -) -> usize { +) -> Option<usize> { if let (Some(query), Some(syntax)) = ( language_config.and_then(|config| config.indent_query()), syntax, ) { let byte_start = text.char_to_byte(pos); let node = get_highest_syntax_node_at_bytepos(syntax, byte_start); - - // let config = load indentation query config from Syntax(should contain language_config) - // TODO: special case for comments // TODO: if preserve_leading_whitespace - calculate_indentation(query, node, new_line) + Some(calculate_indentation(query, node, line, new_line)) } else { - // TODO: heuristics for non-tree sitter grammars - 0 + None } } @@ -442,6 +417,7 @@ where ); let doc = Rope::from(doc); + use crate::diagnostic::Severity; use crate::syntax::{ Configuration, IndentationConfiguration, LanguageConfiguration, Loader, }; @@ -459,6 +435,8 @@ where roots: vec![], comment_token: None, auto_format: false, + diagnostic_severity: Severity::Warning, + tree_sitter_library: None, language_server: None, indent: Some(IndentationConfiguration { tab_width: 4, @@ -482,14 +460,23 @@ where for i in 0..doc.len_lines() { let line = text.line(i); - let indent = indent_level_for_line(line, tab_width); - assert_eq!( - suggested_indent_for_line(&language_config, Some(&syntax), text, i, tab_width), - indent, - "line {}: {}", - i, - line - ); + if let Some(pos) = crate::find_first_non_whitespace_char(line) { + let indent = indent_level_for_line(line, tab_width); + assert_eq!( + suggested_indent_for_pos( + Some(&language_config), + Some(&syntax), + text, + text.line_to_char(i) + pos, + i, + false + ), + Some(indent), + "line {}: \"{}\"", + i, + line + ); + } } } } |