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track char_idx in DocFormatter

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This commit is contained in:
Pascal Kuthe 2023-11-19 22:34:06 +01:00
parent 2023445a08
commit e15626a00a
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4 changed files with 209 additions and 158 deletions
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199
helix-core/src/doc_formatter.rs
View File

@ -37,52 +37,91 @@ pub enum GraphemeSource {
},
}
#[derive(Debug, Clone)]
pub struct FormattedGrapheme<'a> {
pub grapheme: Grapheme<'a>,
pub source: GraphemeSource,
impl GraphemeSource {
/// Returns whether this grapheme is virtual inline text
pub fn is_virtual(self) -> bool {
matches!(self, GraphemeSource::VirtualText { .. })
}
pub fn doc_chars(self) -> usize {
match self {
GraphemeSource::Document { codepoints } => codepoints as usize,
GraphemeSource::VirtualText { .. } => 0,
}
}
}
impl<'a> FormattedGrapheme<'a> {
pub fn new(
#[derive(Debug, Clone)]
pub struct FormattedGrapheme<'a> {
pub raw: Grapheme<'a>,
pub source: GraphemeSource,
pub visual_pos: Position,
/// Document line at the start of the grapheme
pub line_idx: usize,
/// Document char position at the start of the grapheme
pub char_idx: usize,
}
impl FormattedGrapheme<'_> {
pub fn is_virtual(&self) -> bool {
self.source.is_virtual()
}
pub fn doc_chars(&self) -> usize {
self.source.doc_chars()
}
pub fn is_whitespace(&self) -> bool {
self.raw.is_whitespace()
}
pub fn width(&self) -> usize {
self.raw.width()
}
pub fn is_word_boundary(&self) -> bool {
self.raw.is_word_boundary()
}
}
#[derive(Debug, Clone)]
struct GraphemeWithSource<'a> {
grapheme: Grapheme<'a>,
source: GraphemeSource,
}
impl<'a> GraphemeWithSource<'a> {
fn new(
g: GraphemeStr<'a>,
visual_x: usize,
tab_width: u16,
source: GraphemeSource,
) -> FormattedGrapheme<'a> {
FormattedGrapheme {
) -> GraphemeWithSource<'a> {
GraphemeWithSource {
grapheme: Grapheme::new(g, visual_x, tab_width),
source,
}
}
/// Returns whether this grapheme is virtual inline text
pub fn is_virtual(&self) -> bool {
matches!(self.source, GraphemeSource::VirtualText { .. })
}
pub fn placeholder() -> Self {
FormattedGrapheme {
fn placeholder() -> Self {
GraphemeWithSource {
grapheme: Grapheme::Other { g: " ".into() },
source: GraphemeSource::Document { codepoints: 0 },
}
}
pub fn doc_chars(&self) -> usize {
match self.source {
GraphemeSource::Document { codepoints } => codepoints as usize,
GraphemeSource::VirtualText { .. } => 0,
}
fn doc_chars(&self) -> usize {
self.source.doc_chars()
}
pub fn is_whitespace(&self) -> bool {
fn is_whitespace(&self) -> bool {
self.grapheme.is_whitespace()
}
pub fn width(&self) -> usize {
fn width(&self) -> usize {
self.grapheme.width()
}
pub fn is_word_boundary(&self) -> bool {
fn is_word_boundary(&self) -> bool {
self.grapheme.is_word_boundary()
}
}
@ -139,9 +178,9 @@ pub struct DocumentFormatter<'t> {
indent_level: Option<usize>,
/// In case a long word needs to be split a single grapheme might need to be wrapped
/// while the rest of the word stays on the same line
peeked_grapheme: Option<(FormattedGrapheme<'t>, usize)>,
peeked_grapheme: Option<GraphemeWithSource<'t>>,
/// A first-in first-out (fifo) buffer for the Graphemes of any given word
word_buf: Vec<FormattedGrapheme<'t>>,
word_buf: Vec<GraphemeWithSource<'t>>,
/// The index of the next grapheme that will be yielded from the `word_buf`
word_i: usize,
}
@ -157,32 +196,33 @@ pub fn new_at_prev_checkpoint(
text_fmt: &'t TextFormat,
annotations: &'t TextAnnotations,
char_idx: usize,
) -> (Self, usize) {
) -> Self {
// TODO divide long lines into blocks to avoid bad performance for long lines
let block_line_idx = text.char_to_line(char_idx.min(text.len_chars()));
let block_char_idx = text.line_to_char(block_line_idx);
annotations.reset_pos(block_char_idx);
(
DocumentFormatter {
text_fmt,
annotations,
visual_pos: Position { row: 0, col: 0 },
graphemes: RopeGraphemes::new(text.slice(block_char_idx..)),
char_pos: block_char_idx,
exhausted: false,
virtual_lines: 0,
indent_level: None,
peeked_grapheme: None,
word_buf: Vec::with_capacity(64),
word_i: 0,
line_pos: block_line_idx,
inline_anntoation_graphemes: None,
},
block_char_idx,
)
DocumentFormatter {
text_fmt,
annotations,
visual_pos: Position { row: 0, col: 0 },
graphemes: RopeGraphemes::new(text.slice(block_char_idx..)),
char_pos: block_char_idx,
exhausted: false,
virtual_lines: 0,
indent_level: None,
peeked_grapheme: None,
word_buf: Vec::with_capacity(64),
word_i: 0,
line_pos: block_line_idx,
inline_anntoation_graphemes: None,
}
}
fn next_inline_annotation_grapheme(&mut self) -> Option<(&'t str, Option<Highlight>)> {
fn next_inline_annotation_grapheme(
&mut self,
char_pos: usize,
) -> Option<(&'t str, Option<Highlight>)> {
loop {
if let Some(&mut (ref mut annotation, highlight)) =
self.inline_anntoation_graphemes.as_mut()
@ -193,7 +233,7 @@ fn next_inline_annotation_grapheme(&mut self) -> Option<(&'t str, Option<Highlig
}
if let Some((annotation, highlight)) =
self.annotations.next_inline_annotation_at(self.char_pos)
self.annotations.next_inline_annotation_at(char_pos)
{
self.inline_anntoation_graphemes = Some((
UnicodeSegmentation::graphemes(&*annotation.text, true),
@ -205,21 +245,20 @@ fn next_inline_annotation_grapheme(&mut self) -> Option<(&'t str, Option<Highlig
}
}
fn advance_grapheme(&mut self, col: usize) -> Option<FormattedGrapheme<'t>> {
fn advance_grapheme(&mut self, col: usize, char_pos: usize) -> Option<GraphemeWithSource<'t>> {
let (grapheme, source) =
if let Some((grapheme, highlight)) = self.next_inline_annotation_grapheme() {
if let Some((grapheme, highlight)) = self.next_inline_annotation_grapheme(char_pos) {
(grapheme.into(), GraphemeSource::VirtualText { highlight })
} else if let Some(grapheme) = self.graphemes.next() {
self.virtual_lines += self.annotations.annotation_lines_at(self.char_pos);
let codepoints = grapheme.len_chars() as u32;
let overlay = self.annotations.overlay_at(self.char_pos);
let overlay = self.annotations.overlay_at(char_pos);
let grapheme = match overlay {
Some((overlay, _)) => overlay.grapheme.as_str().into(),
None => Cow::from(grapheme).into(),
};
self.char_pos += codepoints as usize;
(grapheme, GraphemeSource::Document { codepoints })
} else {
if self.exhausted {
@ -228,19 +267,19 @@ fn advance_grapheme(&mut self, col: usize) -> Option<FormattedGrapheme<'t>> {
self.exhausted = true;
// EOF grapheme is required for rendering
// and correct position computations
return Some(FormattedGrapheme {
return Some(GraphemeWithSource {
grapheme: Grapheme::Other { g: " ".into() },
source: GraphemeSource::Document { codepoints: 0 },
});
};
let grapheme = FormattedGrapheme::new(grapheme, col, self.text_fmt.tab_width, source);
let grapheme = GraphemeWithSource::new(grapheme, col, self.text_fmt.tab_width, source);
Some(grapheme)
}
/// Move a word to the next visual line
fn wrap_word(&mut self, virtual_lines_before_word: usize) -> usize {
fn wrap_word(&mut self) -> usize {
// softwrap this word to the next line
let indent_carry_over = if let Some(indent) = self.indent_level {
if indent as u16 <= self.text_fmt.max_indent_retain {
@ -255,14 +294,13 @@ fn wrap_word(&mut self, virtual_lines_before_word: usize) -> usize {
};
self.visual_pos.col = indent_carry_over as usize;
self.virtual_lines -= virtual_lines_before_word;
self.visual_pos.row += 1 + virtual_lines_before_word;
self.visual_pos.row += 1 + take(&mut self.virtual_lines);
let mut i = 0;
let mut word_width = 0;
let wrap_indicator = UnicodeSegmentation::graphemes(&*self.text_fmt.wrap_indicator, true)
.map(|g| {
i += 1;
let grapheme = FormattedGrapheme::new(
let grapheme = GraphemeWithSource::new(
g.into(),
self.visual_pos.col + word_width,
self.text_fmt.tab_width,
@ -288,8 +326,7 @@ fn wrap_word(&mut self, virtual_lines_before_word: usize) -> usize {
fn advance_to_next_word(&mut self) {
self.word_buf.clear();
let mut word_width = 0;
let virtual_lines_before_word = self.virtual_lines;
let mut virtual_lines_before_grapheme = self.virtual_lines;
let mut word_chars = 0;
loop {
// softwrap word if necessary
@ -301,27 +338,24 @@ fn advance_to_next_word(&mut self) {
// However if the last grapheme is multiple columns wide it might extend beyond the EOL.
// The condition below ensures that this grapheme is not cutoff and instead wrapped to the next line
if word_width + self.visual_pos.col > self.text_fmt.viewport_width as usize {
self.peeked_grapheme = self.word_buf.pop().map(|grapheme| {
(grapheme, self.virtual_lines - virtual_lines_before_grapheme)
});
self.virtual_lines = virtual_lines_before_grapheme;
self.peeked_grapheme = self.word_buf.pop();
}
return;
}
word_width = self.wrap_word(virtual_lines_before_word);
word_width = self.wrap_word();
}
virtual_lines_before_grapheme = self.virtual_lines;
let grapheme = if let Some((grapheme, virtual_lines)) = self.peeked_grapheme.take() {
self.virtual_lines += virtual_lines;
let grapheme = if let Some(grapheme) = self.peeked_grapheme.take() {
grapheme
} else if let Some(grapheme) = self.advance_grapheme(self.visual_pos.col + word_width) {
} else if let Some(grapheme) =
self.advance_grapheme(self.visual_pos.col + word_width, self.char_pos + word_chars)
{
grapheme
} else {
return;
};
word_chars += grapheme.doc_chars();
// Track indentation
if !grapheme.is_whitespace() && self.indent_level.is_none() {
@ -340,19 +374,19 @@ fn advance_to_next_word(&mut self) {
}
}
/// returns the document line pos of the **next** grapheme that will be yielded
pub fn line_pos(&self) -> usize {
self.line_pos
/// returns the char index at the end of the last yielded grapheme
pub fn next_char_pos(&self) -> usize {
self.char_pos
}
/// returns the visual pos of the **next** grapheme that will be yielded
pub fn visual_pos(&self) -> Position {
/// returns the visual position at the end of the last yielded grapheme
pub fn next_visual_pos(&self) -> Position {
self.visual_pos
}
}
impl<'t> Iterator for DocumentFormatter<'t> {
type Item = (FormattedGrapheme<'t>, Position);
type Item = FormattedGrapheme<'t>;
fn next(&mut self) -> Option<Self::Item> {
let grapheme = if self.text_fmt.soft_wrap {
@ -362,15 +396,18 @@ fn next(&mut self) -> Option<Self::Item> {
}
let grapheme = replace(
self.word_buf.get_mut(self.word_i)?,
FormattedGrapheme::placeholder(),
GraphemeWithSource::placeholder(),
);
self.word_i += 1;
grapheme
} else {
self.advance_grapheme(self.visual_pos.col)?
self.advance_grapheme(self.visual_pos.col, self.char_pos)?
};
let pos = self.visual_pos;
let visual_pos = self.visual_pos;
let char_pos = self.char_pos;
self.char_pos += grapheme.doc_chars();
let line_idx = self.line_pos;
if grapheme.grapheme == Grapheme::Newline {
self.visual_pos.row += 1;
self.visual_pos.row += take(&mut self.virtual_lines);
@ -379,6 +416,12 @@ fn next(&mut self) -> Option<Self::Item> {
} else {
self.visual_pos.col += grapheme.width();
}
Some((grapheme, pos))
Some(FormattedGrapheme {
raw: grapheme.grapheme,
source: grapheme.source,
visual_pos,
line_idx,
char_idx: char_pos,
})
}
}

18
helix-core/src/doc_formatter/test.rs
View File

@ -23,18 +23,18 @@ fn collect_to_str(&mut self) -> String {
let viewport_width = self.text_fmt.viewport_width;
let mut line = 0;
for (grapheme, pos) in self {
if pos.row != line {
for grapheme in self {
if grapheme.visual_pos.row != line {
line += 1;
assert_eq!(pos.row, line);
write!(res, "\n{}", ".".repeat(pos.col)).unwrap();
assert_eq!(grapheme.visual_pos.row, line);
write!(res, "\n{}", ".".repeat(grapheme.visual_pos.col)).unwrap();
assert!(
pos.col <= viewport_width as usize,
grapheme.visual_pos.col <= viewport_width as usize,
"softwrapped failed {}<={viewport_width}",
pos.col
grapheme.visual_pos.col
);
}
write!(res, "{}", grapheme.grapheme).unwrap();
write!(res, "{}", grapheme.raw).unwrap();
}
res
@ -48,7 +48,6 @@ fn softwrap_text(text: &str) -> String {
&TextAnnotations::default(),
0,
)
.0
.collect_to_str()
}
@ -106,7 +105,6 @@ fn overlay_text(text: &str, char_pos: usize, softwrap: bool, overlays: &[Overlay
TextAnnotations::default().add_overlay(overlays, None),
char_pos,
)
.0
.collect_to_str()
}
@ -143,7 +141,6 @@ fn annotate_text(text: &str, softwrap: bool, annotations: &[InlineAnnotation]) -
TextAnnotations::default().add_inline_annotations(annotations, None),
0,
)
.0
.collect_to_str()
}
@ -182,7 +179,6 @@ fn annotation_and_overlay() {
.add_overlay(overlay.as_slice(), None),
0,
)
.0
.collect_to_str(),
"fooo bar "
);

50
helix-core/src/position.rs
View File

@ -157,16 +157,14 @@ pub fn visual_offset_from_block(
annotations: &TextAnnotations,
) -> (Position, usize) {
let mut last_pos = Position::default();
let (formatter, block_start) =
let mut formatter =
DocumentFormatter::new_at_prev_checkpoint(text, text_fmt, annotations, anchor);
let mut char_pos = block_start;
let block_start = formatter.next_char_pos();
for (grapheme, vpos) in formatter {
last_pos = vpos;
char_pos += grapheme.doc_chars();
if char_pos > pos {
return (last_pos, block_start);
while let Some(grapheme) = formatter.next() {
last_pos = grapheme.visual_pos;
if formatter.next_char_pos() > pos {
return (grapheme.visual_pos, block_start);
}
}
@ -189,22 +187,21 @@ pub fn visual_offset_from_anchor(
annotations: &TextAnnotations,
max_rows: usize,
) -> Result<(Position, usize), VisualOffsetError> {
let (formatter, block_start) =
let mut formatter =
DocumentFormatter::new_at_prev_checkpoint(text, text_fmt, annotations, anchor);
let mut char_pos = block_start;
let mut anchor_line = None;
let mut found_pos = None;
let mut last_pos = Position::default();
let block_start = formatter.next_char_pos();
if pos < block_start {
return Err(VisualOffsetError::PosBeforeAnchorRow);
}
for (grapheme, vpos) in formatter {
last_pos = vpos;
char_pos += grapheme.doc_chars();
while let Some(grapheme) = formatter.next() {
last_pos = grapheme.visual_pos;
if char_pos > pos {
if formatter.next_char_pos() > pos {
if let Some(anchor_line) = anchor_line {
last_pos.row -= anchor_line;
return Ok((last_pos, block_start));
@ -212,7 +209,7 @@ pub fn visual_offset_from_anchor(
found_pos = Some(last_pos);
}
}
if char_pos > anchor && anchor_line.is_none() {
if formatter.next_char_pos() > anchor && anchor_line.is_none() {
if let Some(mut found_pos) = found_pos {
return if found_pos.row == last_pos.row {
found_pos.row = 0;
@ -226,7 +223,7 @@ pub fn visual_offset_from_anchor(
}
if let Some(anchor_line) = anchor_line {
if vpos.row >= anchor_line + max_rows {
if grapheme.visual_pos.row >= anchor_line + max_rows {
return Err(VisualOffsetError::PosAfterMaxRow);
}
}
@ -404,34 +401,33 @@ pub fn char_idx_at_visual_block_offset(
text_fmt: &TextFormat,
annotations: &TextAnnotations,
) -> (usize, usize) {
let (formatter, mut char_idx) =
let mut formatter =
DocumentFormatter::new_at_prev_checkpoint(text, text_fmt, annotations, anchor);
let mut last_char_idx = char_idx;
let mut last_char_idx = formatter.next_char_pos();
let mut last_char_idx_on_line = None;
let mut last_row = 0;
for (grapheme, grapheme_pos) in formatter {
match grapheme_pos.row.cmp(&row) {
for grapheme in &mut formatter {
match grapheme.visual_pos.row.cmp(&row) {
Ordering::Equal => {
if grapheme_pos.col + grapheme.width() > column {
if grapheme.visual_pos.col + grapheme.width() > column {
if !grapheme.is_virtual() {
return (char_idx, 0);
return (grapheme.char_idx, 0);
} else if let Some(char_idx) = last_char_idx_on_line {
return (char_idx, 0);
}
} else if !grapheme.is_virtual() {
last_char_idx_on_line = Some(char_idx)
last_char_idx_on_line = Some(grapheme.char_idx)
}
}
Ordering::Greater => return (last_char_idx, row - last_row),
_ => (),
}
last_char_idx = char_idx;
last_row = grapheme_pos.row;
char_idx += grapheme.doc_chars();
last_char_idx = grapheme.char_idx;
last_row = grapheme.visual_pos.row;
}
(char_idx, 0)
(formatter.next_char_pos(), 0)
}
#[cfg(test)]

100
helix-term/src/ui/document.rs
View File

@ -179,21 +179,18 @@ pub fn render_text<'t>(
line_decorations: &mut [Box<dyn LineDecoration + '_>],
translated_positions: &mut [TranslatedPosition],
) {
let (
Position {
row: mut row_off, ..
},
mut char_pos,
) = visual_offset_from_block(
let mut row_off = visual_offset_from_block(
text,
offset.anchor,
offset.anchor,
text_fmt,
text_annotations,
);
)
.0
.row;
row_off += offset.vertical_offset;
let (mut formatter, mut first_visible_char_idx) =
let mut formatter =
DocumentFormatter::new_at_prev_checkpoint(text, text_fmt, text_annotations, offset.anchor);
let mut syntax_styles = StyleIter {
text_style: renderer.text_style,
@ -226,19 +223,19 @@ pub fn render_text<'t>(
let mut overlay_style_span = overlay_styles
.next()
.unwrap_or_else(|| (Style::default(), usize::MAX));
let mut first_visible_char_idx = formatter.next_char_pos();
loop {
// formattter.line_pos returns to line index of the next grapheme
// so it must be called before formatter.next
let doc_line = formatter.line_pos();
let Some((grapheme, mut pos)) = formatter.next() else {
let mut last_pos = formatter.visual_pos();
let Some(mut grapheme) = formatter.next() else {
let mut last_pos = formatter.next_visual_pos();
if last_pos.row >= row_off {
last_pos.col -= 1;
last_pos.row -= row_off;
// check if any positions translated on the fly (like cursor) are at the EOF
translate_positions(
char_pos + 1,
text.len_chars() + 1,
first_visible_char_idx,
translated_positions,
text_fmt,
@ -250,46 +247,56 @@ pub fn render_text<'t>(
};
// skip any graphemes on visual lines before the block start
if pos.row < row_off {
if char_pos >= syntax_style_span.1 {
syntax_style_span = if let Some(syntax_style_span) = syntax_styles.next() {
syntax_style_span
// if pos.row < row_off {
// if char_pos >= syntax_style_span.1 {
// syntax_style_span = if let Some(syntax_style_span) = syntax_styles.next() {
// syntax_style_span
// } else {
// break;
// }
// }
// if char_pos >= overlay_style_span.1 {
// overlay_style_span = if let Some(overlay_style_span) = overlay_styles.next() {
// overlay_style_span
if grapheme.visual_pos.row < row_off {
if grapheme.char_idx >= style_span.1 {
style_span = if let Some(style_span) = styles.next() {
style_span
} else {
break;
}
}
if char_pos >= overlay_style_span.1 {
overlay_style_span = if let Some(overlay_style_span) = overlay_styles.next() {
overlay_style_span
};
overlay_span = if let Some(overlay_span) = overlays.next() {
overlay_span
} else {
break;
}
};
}
char_pos += grapheme.doc_chars();
first_visible_char_idx = char_pos + 1;
first_visible_char_idx = formatter.next_char_pos();
continue;
}
pos.row -= row_off;
grapheme.visual_pos.row -= row_off;
// if the end of the viewport is reached stop rendering
if pos.row as u16 >= renderer.viewport.height {
if grapheme.visual_pos.row as u16 >= renderer.viewport.height + renderer.offset.row as u16 {
break;
}
// apply decorations before rendering a new line
if pos.row as u16 != last_line_pos.visual_line {
if pos.row > 0 {
renderer.draw_indent_guides(last_line_indent_level, last_line_pos.visual_line);
if grapheme.visual_pos.row as u16 != last_line_pos.visual_line {
if grapheme.visual_pos.row > 0 {
// draw indent guides for the last line
renderer
.draw_indent_guides(last_line_indent_level, last_line_pos.visual_line as u16);
is_in_indent_area = true;
for line_decoration in &mut *line_decorations {
line_decoration.render_foreground(renderer, last_line_pos, char_pos);
line_decoration.render_foreground(renderer, last_line_pos, grapheme.char_idx);
}
}
last_line_pos = LinePos {
first_visual_line: doc_line != last_line_pos.doc_line,
doc_line,
visual_line: pos.row as u16,
start_char_idx: char_pos,
first_visual_line: grapheme.line_idx != last_line_pos.doc_line,
doc_line: grapheme.line_idx,
visual_line: grapheme.visual_pos.row as u16,
start_char_idx: grapheme.char_idx,
};
for line_decoration in &mut *line_decorations {
line_decoration.render_background(renderer, last_line_pos);
@ -297,26 +304,25 @@ pub fn render_text<'t>(
}
// acquire the correct grapheme style
while char_pos >= syntax_style_span.1 {
while grapheme.char_idx >= syntax_style_span.1 {
syntax_style_span = syntax_styles
.next()
.unwrap_or((Style::default(), usize::MAX));
}
while char_pos >= overlay_style_span.1 {
while grapheme.char_idx >= overlay_style_span.1 {
overlay_style_span = overlay_styles
.next()
.unwrap_or((Style::default(), usize::MAX));
}
char_pos += grapheme.doc_chars();
// check if any positions translated on the fly (like cursor) has been reached
translate_positions(
char_pos,
formatter.next_char_pos(),
first_visible_char_idx,
translated_positions,
text_fmt,
renderer,
pos,
grapheme.visual_pos,
);
let (syntax_style, overlay_style) =
@ -332,27 +338,37 @@ pub fn render_text<'t>(
let is_virtual = grapheme.is_virtual();
renderer.draw_grapheme(
<<<<<<< HEAD
grapheme.grapheme,
GraphemeStyle {
syntax_style,
overlay_style,
},
is_virtual,
||||||| parent of 5e32edd8 (track char_idx in DocFormatter)
grapheme.grapheme,
grapheme_style,
virt,
=======
grapheme.raw,
grapheme_style,
virt,
>>>>>>> 5e32edd8 (track char_idx in DocFormatter)
&mut last_line_indent_level,
&mut is_in_indent_area,
pos,
grapheme.visual_pos,
);
}
renderer.draw_indent_guides(last_line_indent_level, last_line_pos.visual_line);
for line_decoration in &mut *line_decorations {
line_decoration.render_foreground(renderer, last_line_pos, char_pos);
line_decoration.render_foreground(renderer, last_line_pos, formatter.next_char_pos());
}
}
#[derive(Debug)]
pub struct TextRenderer<'a> {
pub surface: &'a mut Surface,
surface: &'a mut Surface,
pub text_style: Style,
pub whitespace_style: Style,
pub indent_guide_char: String,