1112 lines
39 KiB
Rust
1112 lines
39 KiB
Rust
use super::{
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fold_map,
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tab_map::{self, Edit as TabEdit, Snapshot as TabSnapshot, TabPoint, TextSummary},
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};
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use crate::{editor::Point, settings::HighlightId, util::Bias};
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use gpui::{
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fonts::FontId,
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sum_tree::{self, Cursor, SumTree},
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text_layout::LineWrapper,
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Entity, ModelContext, Task,
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};
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use lazy_static::lazy_static;
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use smol::future::yield_now;
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use std::{collections::VecDeque, ops::Range, time::Duration};
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pub struct WrapMap {
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snapshot: Snapshot,
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pending_edits: VecDeque<(TabSnapshot, Vec<TabEdit>)>,
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wrap_width: Option<f32>,
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background_task: Option<Task<()>>,
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font: (FontId, f32),
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}
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impl Entity for WrapMap {
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type Event = ();
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}
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#[derive(Clone)]
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pub struct Snapshot {
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tab_snapshot: TabSnapshot,
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transforms: SumTree<Transform>,
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interpolated: bool,
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}
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#[derive(Clone, Debug, Default, Eq, PartialEq)]
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struct Transform {
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summary: TransformSummary,
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display_text: Option<&'static str>,
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}
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#[derive(Clone, Debug, Default, Eq, PartialEq)]
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struct TransformSummary {
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input: TextSummary,
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output: TextSummary,
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}
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#[derive(Copy, Clone, Debug, Default, Eq, Ord, PartialOrd, PartialEq)]
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pub struct WrapPoint(super::Point);
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pub struct Chunks<'a> {
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input_chunks: tab_map::Chunks<'a>,
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input_chunk: &'a str,
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output_position: WrapPoint,
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transforms: Cursor<'a, Transform, WrapPoint, TabPoint>,
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}
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pub struct HighlightedChunks<'a> {
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input_chunks: tab_map::HighlightedChunks<'a>,
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input_chunk: &'a str,
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style_id: HighlightId,
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output_position: WrapPoint,
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max_output_row: u32,
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transforms: Cursor<'a, Transform, WrapPoint, TabPoint>,
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}
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pub struct BufferRows<'a> {
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input_buffer_rows: fold_map::BufferRows<'a>,
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input_buffer_row: u32,
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output_row: u32,
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soft_wrapped: bool,
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max_output_row: u32,
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transforms: Cursor<'a, Transform, WrapPoint, TabPoint>,
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}
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impl WrapMap {
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pub fn new(
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tab_snapshot: TabSnapshot,
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font_id: FontId,
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font_size: f32,
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wrap_width: Option<f32>,
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cx: &mut ModelContext<Self>,
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) -> Self {
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let mut this = Self {
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font: (font_id, font_size),
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wrap_width: None,
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pending_edits: Default::default(),
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snapshot: Snapshot::new(tab_snapshot),
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background_task: None,
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};
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this.set_wrap_width(wrap_width, cx);
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this
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}
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#[cfg(test)]
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pub fn is_rewrapping(&self) -> bool {
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self.background_task.is_some()
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}
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pub fn sync(
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&mut self,
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tab_snapshot: TabSnapshot,
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edits: Vec<TabEdit>,
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cx: &mut ModelContext<Self>,
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) -> Snapshot {
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self.pending_edits.push_back((tab_snapshot, edits));
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self.flush_edits(cx);
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self.snapshot.clone()
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}
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pub fn set_font(&mut self, font_id: FontId, font_size: f32, cx: &mut ModelContext<Self>) {
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if (font_id, font_size) != self.font {
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self.font = (font_id, font_size);
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self.rewrap(cx)
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}
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}
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pub fn set_wrap_width(&mut self, wrap_width: Option<f32>, cx: &mut ModelContext<Self>) -> bool {
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if wrap_width == self.wrap_width {
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return false;
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}
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self.wrap_width = wrap_width;
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self.rewrap(cx);
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true
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}
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fn rewrap(&mut self, cx: &mut ModelContext<Self>) {
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self.background_task.take();
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if let Some(wrap_width) = self.wrap_width {
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let mut new_snapshot = self.snapshot.clone();
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let font_cache = cx.font_cache().clone();
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let (font_id, font_size) = self.font;
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let task = cx.background().spawn(async move {
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let mut line_wrapper = font_cache.line_wrapper(font_id, font_size);
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let tab_snapshot = new_snapshot.tab_snapshot.clone();
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let range = TabPoint::zero()..tab_snapshot.max_point();
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new_snapshot
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.update(
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tab_snapshot,
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&[TabEdit {
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old_lines: range.clone(),
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new_lines: range.clone(),
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}],
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wrap_width,
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&mut line_wrapper,
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)
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.await;
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new_snapshot
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});
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match cx
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.background()
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.block_with_timeout(Duration::from_millis(5), task)
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{
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Ok(snapshot) => {
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self.snapshot = snapshot;
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cx.notify();
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}
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Err(wrap_task) => {
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self.background_task = Some(cx.spawn(|this, mut cx| async move {
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let snapshot = wrap_task.await;
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this.update(&mut cx, |this, cx| {
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this.snapshot = snapshot;
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this.background_task = None;
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this.flush_edits(cx);
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cx.notify();
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});
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}));
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}
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}
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} else {
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self.snapshot.transforms = SumTree::new();
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let summary = self.snapshot.tab_snapshot.text_summary();
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if !summary.lines.is_zero() {
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self.snapshot
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.transforms
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.push(Transform::isomorphic(summary), &());
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}
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}
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}
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fn flush_edits(&mut self, cx: &mut ModelContext<Self>) {
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if !self.snapshot.interpolated {
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let mut to_remove_len = 0;
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for (tab_snapshot, _) in &self.pending_edits {
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if tab_snapshot.version() <= self.snapshot.tab_snapshot.version() {
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to_remove_len += 1;
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} else {
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break;
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}
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}
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self.pending_edits.drain(..to_remove_len);
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}
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if self.pending_edits.is_empty() {
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return;
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}
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if let Some(wrap_width) = self.wrap_width {
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if self.background_task.is_none() {
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let pending_edits = self.pending_edits.clone();
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let mut snapshot = self.snapshot.clone();
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let font_cache = cx.font_cache().clone();
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let (font_id, font_size) = self.font;
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let update_task = cx.background().spawn(async move {
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let mut line_wrapper = font_cache.line_wrapper(font_id, font_size);
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for (tab_snapshot, edits) in pending_edits {
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snapshot
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.update(tab_snapshot, &edits, wrap_width, &mut line_wrapper)
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.await;
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}
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snapshot
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});
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match cx
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.background()
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.block_with_timeout(Duration::from_millis(1), update_task)
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{
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Ok(snapshot) => {
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self.snapshot = snapshot;
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}
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Err(update_task) => {
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self.background_task = Some(cx.spawn(|this, mut cx| async move {
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let snapshot = update_task.await;
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this.update(&mut cx, |this, cx| {
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this.snapshot = snapshot;
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this.background_task = None;
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this.flush_edits(cx);
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cx.notify();
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});
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}));
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}
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}
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}
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}
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let was_interpolated = self.snapshot.interpolated;
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let mut to_remove_len = 0;
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for (tab_snapshot, edits) in &self.pending_edits {
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if tab_snapshot.version() <= self.snapshot.tab_snapshot.version() {
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to_remove_len += 1;
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} else {
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self.snapshot.interpolate(tab_snapshot.clone(), &edits);
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}
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}
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if !was_interpolated {
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self.pending_edits.drain(..to_remove_len);
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}
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}
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}
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impl Snapshot {
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fn new(tab_snapshot: TabSnapshot) -> Self {
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let mut transforms = SumTree::new();
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let extent = tab_snapshot.text_summary();
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if !extent.lines.is_zero() {
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transforms.push(Transform::isomorphic(extent), &());
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}
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Self {
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transforms,
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tab_snapshot,
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interpolated: true,
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}
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}
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fn interpolate(&mut self, new_tab_snapshot: TabSnapshot, edits: &[TabEdit]) {
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let mut new_transforms;
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if edits.is_empty() {
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new_transforms = self.transforms.clone();
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} else {
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let mut old_cursor = self.transforms.cursor::<TabPoint, ()>();
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let mut edits = edits.into_iter().peekable();
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new_transforms =
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old_cursor.slice(&edits.peek().unwrap().old_lines.start, Bias::Right, &());
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while let Some(edit) = edits.next() {
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if edit.new_lines.start > TabPoint::from(new_transforms.summary().input.lines) {
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let summary = new_tab_snapshot.text_summary_for_range(
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TabPoint::from(new_transforms.summary().input.lines)..edit.new_lines.start,
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);
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new_transforms.push_or_extend(Transform::isomorphic(summary));
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}
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if !edit.new_lines.is_empty() {
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new_transforms.push_or_extend(Transform::isomorphic(
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new_tab_snapshot.text_summary_for_range(edit.new_lines.clone()),
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));
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}
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old_cursor.seek_forward(&edit.old_lines.end, Bias::Right, &());
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if let Some(next_edit) = edits.peek() {
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if next_edit.old_lines.start > old_cursor.seek_end(&()) {
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if old_cursor.seek_end(&()) > edit.old_lines.end {
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let summary = self.tab_snapshot.text_summary_for_range(
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edit.old_lines.end..old_cursor.seek_end(&()),
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);
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new_transforms.push_or_extend(Transform::isomorphic(summary));
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}
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old_cursor.next(&());
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new_transforms.push_tree(
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old_cursor.slice(&next_edit.old_lines.start, Bias::Right, &()),
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&(),
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);
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}
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} else {
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if old_cursor.seek_end(&()) > edit.old_lines.end {
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let summary = self
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.tab_snapshot
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.text_summary_for_range(edit.old_lines.end..old_cursor.seek_end(&()));
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new_transforms.push_or_extend(Transform::isomorphic(summary));
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}
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old_cursor.next(&());
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new_transforms.push_tree(old_cursor.suffix(&()), &());
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}
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}
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}
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self.transforms = new_transforms;
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self.tab_snapshot = new_tab_snapshot;
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self.interpolated = true;
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self.check_invariants();
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}
|
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async fn update(
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&mut self,
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new_tab_snapshot: TabSnapshot,
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edits: &[TabEdit],
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wrap_width: f32,
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line_wrapper: &mut LineWrapper,
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) {
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#[derive(Debug)]
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struct RowEdit {
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old_rows: Range<u32>,
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new_rows: Range<u32>,
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}
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let mut edits = edits.into_iter().peekable();
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let mut row_edits = Vec::new();
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while let Some(edit) = edits.next() {
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let mut row_edit = RowEdit {
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old_rows: edit.old_lines.start.row()..edit.old_lines.end.row() + 1,
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new_rows: edit.new_lines.start.row()..edit.new_lines.end.row() + 1,
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};
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while let Some(next_edit) = edits.peek() {
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if next_edit.old_lines.start.row() <= row_edit.old_rows.end {
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row_edit.old_rows.end = next_edit.old_lines.end.row() + 1;
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row_edit.new_rows.end = next_edit.new_lines.end.row() + 1;
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edits.next();
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} else {
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break;
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}
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}
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row_edits.push(row_edit);
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}
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let mut new_transforms;
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if row_edits.is_empty() {
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new_transforms = self.transforms.clone();
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} else {
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let mut row_edits = row_edits.into_iter().peekable();
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let mut old_cursor = self.transforms.cursor::<TabPoint, ()>();
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new_transforms = old_cursor.slice(
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&TabPoint::new(row_edits.peek().unwrap().old_rows.start, 0),
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Bias::Right,
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&(),
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);
|
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|
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while let Some(edit) = row_edits.next() {
|
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if edit.new_rows.start > new_transforms.summary().input.lines.row {
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let summary = new_tab_snapshot.text_summary_for_range(
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TabPoint::new(new_transforms.summary().input.lines.row, 0)
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..TabPoint::new(edit.new_rows.start, 0),
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);
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new_transforms.push_or_extend(Transform::isomorphic(summary));
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}
|
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|
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let mut line = String::new();
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let mut remaining = None;
|
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let mut chunks = new_tab_snapshot.chunks_at(TabPoint::new(edit.new_rows.start, 0));
|
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let mut edit_transforms = Vec::<Transform>::new();
|
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for _ in edit.new_rows.start..edit.new_rows.end {
|
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while let Some(chunk) = remaining.take().or_else(|| chunks.next()) {
|
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if let Some(ix) = chunk.find('\n') {
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line.push_str(&chunk[..ix + 1]);
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remaining = Some(&chunk[ix + 1..]);
|
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break;
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} else {
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line.push_str(chunk)
|
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}
|
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}
|
|
|
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if line.is_empty() {
|
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break;
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}
|
|
|
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let mut prev_boundary_ix = 0;
|
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for boundary in line_wrapper.wrap_line(&line, wrap_width) {
|
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let wrapped = &line[prev_boundary_ix..boundary.ix];
|
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push_isomorphic(&mut edit_transforms, TextSummary::from(wrapped));
|
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edit_transforms.push(Transform::wrap(boundary.next_indent));
|
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prev_boundary_ix = boundary.ix;
|
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}
|
|
|
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if prev_boundary_ix < line.len() {
|
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push_isomorphic(
|
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&mut edit_transforms,
|
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TextSummary::from(&line[prev_boundary_ix..]),
|
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);
|
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}
|
|
|
|
line.clear();
|
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yield_now().await;
|
|
}
|
|
|
|
let mut edit_transforms = edit_transforms.into_iter();
|
|
if let Some(transform) = edit_transforms.next() {
|
|
new_transforms.push_or_extend(transform);
|
|
}
|
|
new_transforms.extend(edit_transforms, &());
|
|
|
|
old_cursor.seek_forward(&TabPoint::new(edit.old_rows.end, 0), Bias::Right, &());
|
|
if let Some(next_edit) = row_edits.peek() {
|
|
if next_edit.old_rows.start > old_cursor.seek_end(&()).row() {
|
|
if old_cursor.seek_end(&()) > TabPoint::new(edit.old_rows.end, 0) {
|
|
let summary = self.tab_snapshot.text_summary_for_range(
|
|
TabPoint::new(edit.old_rows.end, 0)..old_cursor.seek_end(&()),
|
|
);
|
|
new_transforms.push_or_extend(Transform::isomorphic(summary));
|
|
}
|
|
old_cursor.next(&());
|
|
new_transforms.push_tree(
|
|
old_cursor.slice(
|
|
&TabPoint::new(next_edit.old_rows.start, 0),
|
|
Bias::Right,
|
|
&(),
|
|
),
|
|
&(),
|
|
);
|
|
}
|
|
} else {
|
|
if old_cursor.seek_end(&()) > TabPoint::new(edit.old_rows.end, 0) {
|
|
let summary = self.tab_snapshot.text_summary_for_range(
|
|
TabPoint::new(edit.old_rows.end, 0)..old_cursor.seek_end(&()),
|
|
);
|
|
new_transforms.push_or_extend(Transform::isomorphic(summary));
|
|
}
|
|
old_cursor.next(&());
|
|
new_transforms.push_tree(old_cursor.suffix(&()), &());
|
|
}
|
|
}
|
|
}
|
|
|
|
self.transforms = new_transforms;
|
|
self.tab_snapshot = new_tab_snapshot;
|
|
self.interpolated = false;
|
|
self.check_invariants();
|
|
}
|
|
|
|
pub fn chunks_at(&self, wrap_row: u32) -> Chunks {
|
|
let point = WrapPoint::new(wrap_row, 0);
|
|
let mut transforms = self.transforms.cursor::<WrapPoint, TabPoint>();
|
|
transforms.seek(&point, Bias::Right, &());
|
|
let mut input_position = TabPoint(transforms.sum_start().0);
|
|
if transforms.item().map_or(false, |t| t.is_isomorphic()) {
|
|
input_position.0 += point.0 - transforms.seek_start().0;
|
|
}
|
|
let input_chunks = self.tab_snapshot.chunks_at(input_position);
|
|
Chunks {
|
|
input_chunks,
|
|
transforms,
|
|
output_position: point,
|
|
input_chunk: "",
|
|
}
|
|
}
|
|
|
|
pub fn highlighted_chunks_for_rows(&mut self, rows: Range<u32>) -> HighlightedChunks {
|
|
let output_start = WrapPoint::new(rows.start, 0);
|
|
let output_end = WrapPoint::new(rows.end, 0);
|
|
let mut transforms = self.transforms.cursor::<WrapPoint, TabPoint>();
|
|
transforms.seek(&output_start, Bias::Right, &());
|
|
let mut input_start = TabPoint(transforms.sum_start().0);
|
|
if transforms.item().map_or(false, |t| t.is_isomorphic()) {
|
|
input_start.0 += output_start.0 - transforms.seek_start().0;
|
|
}
|
|
let input_end = self
|
|
.to_tab_point(output_end)
|
|
.min(self.tab_snapshot.max_point());
|
|
HighlightedChunks {
|
|
input_chunks: self.tab_snapshot.highlighted_chunks(input_start..input_end),
|
|
input_chunk: "",
|
|
style_id: HighlightId::default(),
|
|
output_position: output_start,
|
|
max_output_row: rows.end,
|
|
transforms,
|
|
}
|
|
}
|
|
|
|
pub fn max_point(&self) -> WrapPoint {
|
|
self.to_wrap_point(self.tab_snapshot.max_point())
|
|
}
|
|
|
|
pub fn line_len(&self, row: u32) -> u32 {
|
|
let mut len = 0;
|
|
for chunk in self.chunks_at(row) {
|
|
if let Some(newline_ix) = chunk.find('\n') {
|
|
len += newline_ix;
|
|
break;
|
|
} else {
|
|
len += chunk.len();
|
|
}
|
|
}
|
|
len as u32
|
|
}
|
|
|
|
pub fn soft_wrap_indent(&self, row: u32) -> Option<u32> {
|
|
let mut cursor = self.transforms.cursor::<_, ()>();
|
|
cursor.seek(&WrapPoint::new(row + 1, 0), Bias::Right, &());
|
|
cursor.item().and_then(|transform| {
|
|
if transform.is_isomorphic() {
|
|
None
|
|
} else {
|
|
Some(transform.summary.output.lines.column)
|
|
}
|
|
})
|
|
}
|
|
|
|
pub fn longest_row(&self) -> u32 {
|
|
self.transforms.summary().output.longest_row
|
|
}
|
|
|
|
pub fn buffer_rows(&self, start_row: u32) -> BufferRows {
|
|
let mut transforms = self.transforms.cursor::<WrapPoint, TabPoint>();
|
|
transforms.seek(&WrapPoint::new(start_row, 0), Bias::Left, &());
|
|
let mut input_row = transforms.sum_start().row();
|
|
if transforms.item().map_or(false, |t| t.is_isomorphic()) {
|
|
input_row += start_row - transforms.seek_start().row();
|
|
}
|
|
let soft_wrapped = transforms.item().map_or(false, |t| !t.is_isomorphic());
|
|
let mut input_buffer_rows = self.tab_snapshot.buffer_rows(input_row);
|
|
let input_buffer_row = input_buffer_rows.next().unwrap();
|
|
BufferRows {
|
|
transforms,
|
|
input_buffer_row,
|
|
input_buffer_rows,
|
|
output_row: start_row,
|
|
soft_wrapped,
|
|
max_output_row: self.max_point().row(),
|
|
}
|
|
}
|
|
|
|
pub fn to_tab_point(&self, point: WrapPoint) -> TabPoint {
|
|
let mut cursor = self.transforms.cursor::<WrapPoint, TabPoint>();
|
|
cursor.seek(&point, Bias::Right, &());
|
|
let mut tab_point = cursor.sum_start().0;
|
|
if cursor.item().map_or(false, |t| t.is_isomorphic()) {
|
|
tab_point += point.0 - cursor.seek_start().0;
|
|
}
|
|
TabPoint(tab_point)
|
|
}
|
|
|
|
pub fn to_wrap_point(&self, point: TabPoint) -> WrapPoint {
|
|
let mut cursor = self.transforms.cursor::<TabPoint, WrapPoint>();
|
|
cursor.seek(&point, Bias::Right, &());
|
|
WrapPoint(cursor.sum_start().0 + (point.0 - cursor.seek_start().0))
|
|
}
|
|
|
|
pub fn clip_point(&self, mut point: WrapPoint, bias: Bias) -> WrapPoint {
|
|
if bias == Bias::Left {
|
|
let mut cursor = self.transforms.cursor::<WrapPoint, ()>();
|
|
cursor.seek(&point, Bias::Right, &());
|
|
if cursor.item().map_or(false, |t| !t.is_isomorphic()) {
|
|
point = *cursor.seek_start();
|
|
*point.column_mut() -= 1;
|
|
}
|
|
}
|
|
|
|
self.to_wrap_point(self.tab_snapshot.clip_point(self.to_tab_point(point), bias))
|
|
}
|
|
|
|
fn check_invariants(&self) {
|
|
#[cfg(test)]
|
|
{
|
|
assert_eq!(
|
|
TabPoint::from(self.transforms.summary().input.lines),
|
|
self.tab_snapshot.max_point()
|
|
);
|
|
|
|
{
|
|
let mut transforms = self.transforms.cursor::<(), ()>().peekable();
|
|
while let Some(transform) = transforms.next() {
|
|
if let Some(next_transform) = transforms.peek() {
|
|
assert!(transform.is_isomorphic() != next_transform.is_isomorphic());
|
|
}
|
|
}
|
|
}
|
|
|
|
let mut expected_buffer_rows = Vec::new();
|
|
let mut buffer_row = 0;
|
|
let mut prev_tab_row = 0;
|
|
for display_row in 0..=self.max_point().row() {
|
|
let tab_point = self.to_tab_point(WrapPoint::new(display_row, 0));
|
|
let soft_wrapped;
|
|
if tab_point.row() == prev_tab_row {
|
|
soft_wrapped = display_row != 0;
|
|
} else {
|
|
let fold_point = self.tab_snapshot.to_fold_point(tab_point, Bias::Left).0;
|
|
let buffer_point = fold_point.to_buffer_point(&self.tab_snapshot.fold_snapshot);
|
|
buffer_row = buffer_point.row;
|
|
prev_tab_row = tab_point.row();
|
|
soft_wrapped = false;
|
|
}
|
|
expected_buffer_rows.push((buffer_row, soft_wrapped));
|
|
}
|
|
|
|
for start_display_row in 0..expected_buffer_rows.len() {
|
|
assert_eq!(
|
|
self.buffer_rows(start_display_row as u32)
|
|
.collect::<Vec<_>>(),
|
|
&expected_buffer_rows[start_display_row..],
|
|
"invalid buffer_rows({}..)",
|
|
start_display_row
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
impl<'a> Iterator for Chunks<'a> {
|
|
type Item = &'a str;
|
|
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
let transform = self.transforms.item()?;
|
|
if let Some(display_text) = transform.display_text {
|
|
if self.output_position > *self.transforms.seek_start() {
|
|
self.output_position.0.column += transform.summary.output.lines.column;
|
|
self.transforms.next(&());
|
|
return Some(&display_text[1..]);
|
|
} else {
|
|
self.output_position.0 += transform.summary.output.lines;
|
|
self.transforms.next(&());
|
|
return Some(display_text);
|
|
}
|
|
}
|
|
|
|
if self.input_chunk.is_empty() {
|
|
self.input_chunk = self.input_chunks.next().unwrap();
|
|
}
|
|
|
|
let mut input_len = 0;
|
|
let transform_end = self.transforms.seek_end(&());
|
|
for c in self.input_chunk.chars() {
|
|
let char_len = c.len_utf8();
|
|
input_len += char_len;
|
|
if c == '\n' {
|
|
*self.output_position.row_mut() += 1;
|
|
*self.output_position.column_mut() = 0;
|
|
} else {
|
|
*self.output_position.column_mut() += char_len as u32;
|
|
}
|
|
|
|
if self.output_position >= transform_end {
|
|
self.transforms.next(&());
|
|
break;
|
|
}
|
|
}
|
|
|
|
let (prefix, suffix) = self.input_chunk.split_at(input_len);
|
|
self.input_chunk = suffix;
|
|
Some(prefix)
|
|
}
|
|
}
|
|
|
|
impl<'a> Iterator for HighlightedChunks<'a> {
|
|
type Item = (&'a str, HighlightId);
|
|
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
if self.output_position.row() >= self.max_output_row {
|
|
return None;
|
|
}
|
|
|
|
let transform = self.transforms.item()?;
|
|
if let Some(display_text) = transform.display_text {
|
|
let mut start_ix = 0;
|
|
let mut end_ix = display_text.len();
|
|
let mut summary = transform.summary.output.lines;
|
|
|
|
if self.output_position > *self.transforms.seek_start() {
|
|
// Exclude newline starting prior to the desired row.
|
|
start_ix = 1;
|
|
summary.row = 0;
|
|
} else if self.output_position.row() + 1 >= self.max_output_row {
|
|
// Exclude soft indentation ending after the desired row.
|
|
end_ix = 1;
|
|
summary.column = 0;
|
|
}
|
|
|
|
self.output_position.0 += summary;
|
|
self.transforms.next(&());
|
|
return Some((&display_text[start_ix..end_ix], self.style_id));
|
|
}
|
|
|
|
if self.input_chunk.is_empty() {
|
|
let (chunk, style_id) = self.input_chunks.next().unwrap();
|
|
self.input_chunk = chunk;
|
|
self.style_id = style_id;
|
|
}
|
|
|
|
let mut input_len = 0;
|
|
let transform_end = self.transforms.seek_end(&());
|
|
for c in self.input_chunk.chars() {
|
|
let char_len = c.len_utf8();
|
|
input_len += char_len;
|
|
if c == '\n' {
|
|
*self.output_position.row_mut() += 1;
|
|
*self.output_position.column_mut() = 0;
|
|
} else {
|
|
*self.output_position.column_mut() += char_len as u32;
|
|
}
|
|
|
|
if self.output_position >= transform_end {
|
|
self.transforms.next(&());
|
|
break;
|
|
}
|
|
}
|
|
|
|
let (prefix, suffix) = self.input_chunk.split_at(input_len);
|
|
self.input_chunk = suffix;
|
|
Some((prefix, self.style_id))
|
|
}
|
|
}
|
|
|
|
impl<'a> Iterator for BufferRows<'a> {
|
|
type Item = (u32, bool);
|
|
|
|
fn next(&mut self) -> Option<Self::Item> {
|
|
if self.output_row > self.max_output_row {
|
|
return None;
|
|
}
|
|
|
|
let buffer_row = self.input_buffer_row;
|
|
let soft_wrapped = self.soft_wrapped;
|
|
|
|
self.output_row += 1;
|
|
self.transforms
|
|
.seek_forward(&WrapPoint::new(self.output_row, 0), Bias::Left, &());
|
|
if self.transforms.item().map_or(false, |t| t.is_isomorphic()) {
|
|
self.input_buffer_row = self.input_buffer_rows.next().unwrap();
|
|
self.soft_wrapped = false;
|
|
} else {
|
|
self.soft_wrapped = true;
|
|
}
|
|
|
|
Some((buffer_row, soft_wrapped))
|
|
}
|
|
}
|
|
|
|
impl Transform {
|
|
fn isomorphic(summary: TextSummary) -> Self {
|
|
#[cfg(test)]
|
|
assert!(!summary.lines.is_zero());
|
|
|
|
Self {
|
|
summary: TransformSummary {
|
|
input: summary.clone(),
|
|
output: summary,
|
|
},
|
|
display_text: None,
|
|
}
|
|
}
|
|
|
|
fn wrap(indent: u32) -> Self {
|
|
lazy_static! {
|
|
static ref WRAP_TEXT: String = {
|
|
let mut wrap_text = String::new();
|
|
wrap_text.push('\n');
|
|
wrap_text.extend((0..LineWrapper::MAX_INDENT as usize).map(|_| ' '));
|
|
wrap_text
|
|
};
|
|
}
|
|
|
|
Self {
|
|
summary: TransformSummary {
|
|
input: TextSummary::default(),
|
|
output: TextSummary {
|
|
lines: Point::new(1, indent),
|
|
first_line_chars: 0,
|
|
last_line_chars: indent,
|
|
longest_row: 1,
|
|
longest_row_chars: indent,
|
|
},
|
|
},
|
|
display_text: Some(&WRAP_TEXT[..1 + indent as usize]),
|
|
}
|
|
}
|
|
|
|
fn is_isomorphic(&self) -> bool {
|
|
self.display_text.is_none()
|
|
}
|
|
}
|
|
|
|
impl sum_tree::Item for Transform {
|
|
type Summary = TransformSummary;
|
|
|
|
fn summary(&self) -> Self::Summary {
|
|
self.summary.clone()
|
|
}
|
|
}
|
|
|
|
fn push_isomorphic(transforms: &mut Vec<Transform>, summary: TextSummary) {
|
|
if let Some(last_transform) = transforms.last_mut() {
|
|
if last_transform.is_isomorphic() {
|
|
last_transform.summary.input += &summary;
|
|
last_transform.summary.output += &summary;
|
|
return;
|
|
}
|
|
}
|
|
transforms.push(Transform::isomorphic(summary));
|
|
}
|
|
|
|
trait SumTreeExt {
|
|
fn push_or_extend(&mut self, transform: Transform);
|
|
}
|
|
|
|
impl SumTreeExt for SumTree<Transform> {
|
|
fn push_or_extend(&mut self, transform: Transform) {
|
|
let mut transform = Some(transform);
|
|
self.update_last(
|
|
|last_transform| {
|
|
if last_transform.is_isomorphic() && transform.as_ref().unwrap().is_isomorphic() {
|
|
let transform = transform.take().unwrap();
|
|
last_transform.summary.input += &transform.summary.input;
|
|
last_transform.summary.output += &transform.summary.output;
|
|
}
|
|
},
|
|
&(),
|
|
);
|
|
|
|
if let Some(transform) = transform {
|
|
self.push(transform, &());
|
|
}
|
|
}
|
|
}
|
|
|
|
impl WrapPoint {
|
|
pub fn new(row: u32, column: u32) -> Self {
|
|
Self(super::Point::new(row, column))
|
|
}
|
|
|
|
#[cfg(test)]
|
|
pub fn is_zero(&self) -> bool {
|
|
self.0.is_zero()
|
|
}
|
|
|
|
pub fn row(self) -> u32 {
|
|
self.0.row
|
|
}
|
|
|
|
pub fn column(self) -> u32 {
|
|
self.0.column
|
|
}
|
|
|
|
pub fn row_mut(&mut self) -> &mut u32 {
|
|
&mut self.0.row
|
|
}
|
|
|
|
pub fn column_mut(&mut self) -> &mut u32 {
|
|
&mut self.0.column
|
|
}
|
|
}
|
|
|
|
impl sum_tree::Summary for TransformSummary {
|
|
type Context = ();
|
|
|
|
fn add_summary(&mut self, other: &Self, _: &()) {
|
|
self.input += &other.input;
|
|
self.output += &other.output;
|
|
}
|
|
}
|
|
|
|
impl<'a> sum_tree::Dimension<'a, TransformSummary> for TabPoint {
|
|
fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
|
|
self.0 += summary.input.lines;
|
|
}
|
|
}
|
|
|
|
impl<'a> sum_tree::Dimension<'a, TransformSummary> for WrapPoint {
|
|
fn add_summary(&mut self, summary: &'a TransformSummary, _: &()) {
|
|
self.0 += summary.output.lines;
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
use crate::{
|
|
editor::{
|
|
display_map::{fold_map::FoldMap, tab_map::TabMap},
|
|
Buffer,
|
|
},
|
|
test::Observer,
|
|
util::RandomCharIter,
|
|
};
|
|
use rand::prelude::*;
|
|
use std::env;
|
|
|
|
#[gpui::test(iterations = 100)]
|
|
async fn test_random_wraps(mut cx: gpui::TestAppContext, mut rng: StdRng) {
|
|
cx.foreground().set_block_on_ticks(0..=50);
|
|
cx.foreground().forbid_parking();
|
|
let operations = env::var("OPERATIONS")
|
|
.map(|i| i.parse().expect("invalid `OPERATIONS` variable"))
|
|
.unwrap_or(10);
|
|
|
|
let font_cache = cx.font_cache().clone();
|
|
let font_system = cx.platform().fonts();
|
|
let mut wrap_width = if rng.gen_bool(0.1) {
|
|
None
|
|
} else {
|
|
Some(rng.gen_range(0.0..=1000.0))
|
|
};
|
|
let tab_size = rng.gen_range(1..=4);
|
|
let family_id = font_cache.load_family(&["Helvetica"]).unwrap();
|
|
let font_id = font_cache
|
|
.select_font(family_id, &Default::default())
|
|
.unwrap();
|
|
let font_size = 14.0;
|
|
|
|
log::info!("Tab size: {}", tab_size);
|
|
log::info!("Wrap width: {:?}", wrap_width);
|
|
|
|
let buffer = cx.add_model(|cx| {
|
|
let len = rng.gen_range(0..10);
|
|
let text = RandomCharIter::new(&mut rng).take(len).collect::<String>();
|
|
Buffer::new(0, text, cx)
|
|
});
|
|
let (mut fold_map, folds_snapshot) = cx.read(|cx| FoldMap::new(buffer.clone(), cx));
|
|
let (tab_map, tabs_snapshot) = TabMap::new(folds_snapshot.clone(), tab_size);
|
|
log::info!(
|
|
"Unwrapped text (no folds): {:?}",
|
|
buffer.read_with(&cx, |buf, _| buf.text())
|
|
);
|
|
log::info!(
|
|
"Unwrapped text (unexpanded tabs): {:?}",
|
|
folds_snapshot.text()
|
|
);
|
|
log::info!("Unwrapped text (expanded tabs): {:?}", tabs_snapshot.text());
|
|
|
|
let mut line_wrapper = LineWrapper::new(font_id, font_size, font_system);
|
|
let unwrapped_text = tabs_snapshot.text();
|
|
let expected_text = wrap_text(&unwrapped_text, wrap_width, &mut line_wrapper);
|
|
|
|
let wrap_map = cx.add_model(|cx| {
|
|
WrapMap::new(tabs_snapshot.clone(), font_id, font_size, wrap_width, cx)
|
|
});
|
|
let (_observer, notifications) = Observer::new(&wrap_map, &mut cx);
|
|
|
|
if wrap_map.read_with(&cx, |map, _| map.is_rewrapping()) {
|
|
notifications.recv().await.unwrap();
|
|
}
|
|
|
|
let snapshot = wrap_map.update(&mut cx, |map, cx| map.sync(tabs_snapshot, Vec::new(), cx));
|
|
let actual_text = snapshot.text();
|
|
assert_eq!(
|
|
actual_text, expected_text,
|
|
"unwrapped text is: {:?}",
|
|
unwrapped_text
|
|
);
|
|
log::info!("Wrapped text: {:?}", actual_text);
|
|
|
|
for _i in 0..operations {
|
|
match rng.gen_range(0..=100) {
|
|
0..=19 => {
|
|
wrap_width = if rng.gen_bool(0.2) {
|
|
None
|
|
} else {
|
|
Some(rng.gen_range(0.0..=1000.0))
|
|
};
|
|
log::info!("Setting wrap width to {:?}", wrap_width);
|
|
wrap_map.update(&mut cx, |map, cx| map.set_wrap_width(wrap_width, cx));
|
|
}
|
|
20..=39 => {
|
|
for (folds_snapshot, edits) in
|
|
cx.read(|cx| fold_map.randomly_mutate(&mut rng, cx))
|
|
{
|
|
let (tabs_snapshot, edits) = tab_map.sync(folds_snapshot, edits);
|
|
let mut snapshot =
|
|
wrap_map.update(&mut cx, |map, cx| map.sync(tabs_snapshot, edits, cx));
|
|
snapshot.check_invariants();
|
|
snapshot.verify_chunks(&mut rng);
|
|
}
|
|
}
|
|
_ => {
|
|
buffer.update(&mut cx, |buffer, cx| buffer.randomly_mutate(&mut rng, cx));
|
|
}
|
|
}
|
|
|
|
log::info!(
|
|
"Unwrapped text (no folds): {:?}",
|
|
buffer.read_with(&cx, |buf, _| buf.text())
|
|
);
|
|
let (folds_snapshot, edits) = cx.read(|cx| fold_map.read(cx));
|
|
log::info!(
|
|
"Unwrapped text (unexpanded tabs): {:?}",
|
|
folds_snapshot.text()
|
|
);
|
|
let (tabs_snapshot, edits) = tab_map.sync(folds_snapshot, edits);
|
|
log::info!("Unwrapped text (expanded tabs): {:?}", tabs_snapshot.text());
|
|
|
|
let unwrapped_text = tabs_snapshot.text();
|
|
let expected_text = wrap_text(&unwrapped_text, wrap_width, &mut line_wrapper);
|
|
let mut snapshot = wrap_map.update(&mut cx, |map, cx| {
|
|
map.sync(tabs_snapshot.clone(), edits, cx)
|
|
});
|
|
snapshot.check_invariants();
|
|
snapshot.verify_chunks(&mut rng);
|
|
|
|
if wrap_map.read_with(&cx, |map, _| map.is_rewrapping()) && rng.gen_bool(0.4) {
|
|
log::info!("Waiting for wrapping to finish");
|
|
while wrap_map.read_with(&cx, |map, _| map.is_rewrapping()) {
|
|
notifications.recv().await.unwrap();
|
|
}
|
|
}
|
|
|
|
if !wrap_map.read_with(&cx, |map, _| map.is_rewrapping()) {
|
|
let mut wrapped_snapshot =
|
|
wrap_map.update(&mut cx, |map, cx| map.sync(tabs_snapshot, Vec::new(), cx));
|
|
let actual_text = wrapped_snapshot.text();
|
|
log::info!("Wrapping finished: {:?}", actual_text);
|
|
wrapped_snapshot.check_invariants();
|
|
wrapped_snapshot.verify_chunks(&mut rng);
|
|
assert_eq!(
|
|
actual_text, expected_text,
|
|
"unwrapped text is: {:?}",
|
|
unwrapped_text
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
fn wrap_text(
|
|
unwrapped_text: &str,
|
|
wrap_width: Option<f32>,
|
|
line_wrapper: &mut LineWrapper,
|
|
) -> String {
|
|
if let Some(wrap_width) = wrap_width {
|
|
let mut wrapped_text = String::new();
|
|
for (row, line) in unwrapped_text.split('\n').enumerate() {
|
|
if row > 0 {
|
|
wrapped_text.push('\n')
|
|
}
|
|
|
|
let mut prev_ix = 0;
|
|
for boundary in line_wrapper.wrap_line(line, wrap_width) {
|
|
wrapped_text.push_str(&line[prev_ix..boundary.ix]);
|
|
wrapped_text.push('\n');
|
|
wrapped_text.push_str(&" ".repeat(boundary.next_indent as usize));
|
|
prev_ix = boundary.ix;
|
|
}
|
|
wrapped_text.push_str(&line[prev_ix..]);
|
|
}
|
|
wrapped_text
|
|
} else {
|
|
unwrapped_text.to_string()
|
|
}
|
|
}
|
|
|
|
impl Snapshot {
|
|
fn text(&self) -> String {
|
|
self.chunks_at(0).collect()
|
|
}
|
|
|
|
fn verify_chunks(&mut self, rng: &mut impl Rng) {
|
|
for _ in 0..5 {
|
|
let mut end_row = rng.gen_range(0..=self.max_point().row());
|
|
let start_row = rng.gen_range(0..=end_row);
|
|
end_row += 1;
|
|
|
|
let mut expected_text = self.chunks_at(start_row).collect::<String>();
|
|
if expected_text.ends_with("\n") {
|
|
expected_text.push('\n');
|
|
}
|
|
let mut expected_text = expected_text
|
|
.lines()
|
|
.take((end_row - start_row) as usize)
|
|
.collect::<Vec<_>>()
|
|
.join("\n");
|
|
if end_row <= self.max_point().row() {
|
|
expected_text.push('\n');
|
|
}
|
|
|
|
let actual_text = self
|
|
.highlighted_chunks_for_rows(start_row..end_row)
|
|
.map(|c| c.0)
|
|
.collect::<String>();
|
|
assert_eq!(
|
|
expected_text,
|
|
actual_text,
|
|
"chunks != highlighted_chunks for rows {:?}",
|
|
start_row..end_row
|
|
);
|
|
}
|
|
}
|
|
}
|
|
}
|