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Merge pull request #2776 from iced-rs/fix/markdown

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Incremental `markdown` parsing and various fixes
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Héctor 2025-02-01 03:14:08 +01:00 • committed by GitHub
commit 91f94f3b6e
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11 changed files with 547 additions and 168 deletions
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1
Cargo.lock generated
View file

@ -2640,6 +2640,7 @@ dependencies = [
"iced_highlighter",
"iced_renderer",
"iced_runtime",
"log",
"num-traits",
"ouroboros",
"pulldown-cmark",

2
examples/markdown/Cargo.toml
View file

@ -7,6 +7,6 @@ publish = false
[dependencies]
iced.workspace = true
iced.features = ["markdown", "highlighter", "debug"]
iced.features = ["markdown", "highlighter", "tokio", "debug"]
open = "5.3"

105
examples/markdown/src/main.rs
View file

@ -1,23 +1,37 @@
use iced::highlighter;
use iced::widget::{self, markdown, row, scrollable, text_editor};
use iced::{Element, Fill, Font, Task, Theme};
use iced::time::{self, milliseconds};
use iced::widget::{
self, hover, markdown, right, row, scrollable, text_editor, toggler,
};
use iced::{Element, Fill, Font, Subscription, Task, Theme};
pub fn main() -> iced::Result {
iced::application("Markdown - Iced", Markdown::update, Markdown::view)
.subscription(Markdown::subscription)
.theme(Markdown::theme)
.run_with(Markdown::new)
}
struct Markdown {
content: text_editor::Content,
items: Vec<markdown::Item>,
mode: Mode,
theme: Theme,
}
enum Mode {
Preview(Vec<markdown::Item>),
Stream {
pending: String,
parsed: markdown::Content,
},
}
#[derive(Debug, Clone)]
enum Message {
Edit(text_editor::Action),
LinkClicked(markdown::Url),
ToggleStream(bool),
NextToken,
}
impl Markdown {
@ -29,14 +43,14 @@ impl Markdown {
(
Self {
content: text_editor::Content::with_text(INITIAL_CONTENT),
items: markdown::parse(INITIAL_CONTENT).collect(),
mode: Mode::Preview(markdown::parse(INITIAL_CONTENT).collect()),
theme,
},
widget::focus_next(),
)
}
fn update(&mut self, message: Message) {
fn update(&mut self, message: Message) -> Task<Message> {
match message {
Message::Edit(action) => {
let is_edit = action.is_edit();
@ -44,12 +58,56 @@ impl Markdown {
self.content.perform(action);
if is_edit {
self.items =
markdown::parse(&self.content.text()).collect();
self.mode = Mode::Preview(
markdown::parse(&self.content.text()).collect(),
);
}
Task::none()
}
Message::LinkClicked(link) => {
let _ = open::that_in_background(link.to_string());
Task::none()
}
Message::ToggleStream(enable_stream) => {
if enable_stream {
self.mode = Mode::Stream {
pending: self.content.text(),
parsed: markdown::Content::new(),
};
scrollable::snap_to(
"preview",
scrollable::RelativeOffset::END,
)
} else {
self.mode = Mode::Preview(
markdown::parse(&self.content.text()).collect(),
);
Task::none()
}
}
Message::NextToken => {
match &mut self.mode {
Mode::Preview(_) => {}
Mode::Stream { pending, parsed } => {
if pending.is_empty() {
self.mode = Mode::Preview(parsed.items().to_vec());
} else {
let mut tokens = pending.split(' ');
if let Some(token) = tokens.next() {
parsed.push_str(&format!("{token} "));
}
*pending = tokens.collect::<Vec<_>>().join(" ");
}
}
}
Task::none()
}
}
}
@ -63,14 +121,34 @@ impl Markdown {
.font(Font::MONOSPACE)
.highlight("markdown", highlighter::Theme::Base16Ocean);
let items = match &self.mode {
Mode::Preview(items) => items.as_slice(),
Mode::Stream { parsed, .. } => parsed.items(),
};
let preview = markdown(
&self.items,
items,
markdown::Settings::default(),
markdown::Style::from_palette(self.theme.palette()),
)
.map(Message::LinkClicked);
row![editor, scrollable(preview).spacing(10).height(Fill)]
row![
editor,
hover(
scrollable(preview)
.spacing(10)
.width(Fill)
.height(Fill)
.id("preview"),
right(
toggler(matches!(self.mode, Mode::Stream { .. }))
.label("Stream")
.on_toggle(Message::ToggleStream)
)
.padding([0, 20])
)
]
.spacing(10)
.padding(10)
.into()
@ -79,4 +157,13 @@ impl Markdown {
fn theme(&self) -> Theme {
self.theme.clone()
}
fn subscription(&self) -> Subscription<Message> {
match self.mode {
Mode::Preview(_) => Subscription::none(),
Mode::Stream { .. } => {
time::every(milliseconds(20)).map(|_| Message::NextToken)
}
}
}
}

82
highlighter/src/lib.rs
View file

@ -7,6 +7,7 @@ use crate::core::Color;
use std::ops::Range;
use std::sync::LazyLock;
use syntect::highlighting;
use syntect::parsing;
@ -104,9 +105,20 @@ impl highlighter::Highlighter for Highlighter {
let ops = parser.parse_line(line, &SYNTAXES).unwrap_or_default();
let highlighter = &self.highlighter;
Box::new(scope_iterator(ops, line, stack, &self.highlighter))
}
Box::new(
fn current_line(&self) -> usize {
self.current_line
}
}
fn scope_iterator<'a>(
ops: Vec<(usize, parsing::ScopeStackOp)>,
line: &str,
stack: &'a mut parsing::ScopeStack,
highlighter: &'a highlighting::Highlighter<'static>,
) -> impl Iterator<Item = (Range<usize>, Highlight)> + 'a {
ScopeRangeIterator {
ops,
line_length: line.len(),
@ -121,17 +133,69 @@ impl highlighter::Highlighter for Highlighter {
} else {
Some((
range,
Highlight(
highlighter.style_mod_for_stack(&stack.scopes),
),
Highlight(highlighter.style_mod_for_stack(&stack.scopes)),
))
}
}),
)
})
}
/// A streaming syntax highlighter.
///
/// It can efficiently highlight an immutable stream of tokens.
#[derive(Debug)]
pub struct Stream {
syntax: &'static parsing::SyntaxReference,
highlighter: highlighting::Highlighter<'static>,
commit: (parsing::ParseState, parsing::ScopeStack),
state: parsing::ParseState,
stack: parsing::ScopeStack,
}
impl Stream {
/// Creates a new [`Stream`] highlighter.
pub fn new(settings: &Settings) -> Self {
let syntax = SYNTAXES
.find_syntax_by_token(&settings.token)
.unwrap_or_else(|| SYNTAXES.find_syntax_plain_text());
let highlighter = highlighting::Highlighter::new(
&THEMES.themes[settings.theme.key()],
);
let state = parsing::ParseState::new(syntax);
let stack = parsing::ScopeStack::new();
Self {
syntax,
highlighter,
commit: (state.clone(), stack.clone()),
state,
stack,
}
}
fn current_line(&self) -> usize {
self.current_line
/// Highlights the given line from the last commit.
pub fn highlight_line(
&mut self,
line: &str,
) -> impl Iterator<Item = (Range<usize>, Highlight)> + '_ {
self.state = self.commit.0.clone();
self.stack = self.commit.1.clone();
let ops = self.state.parse_line(line, &SYNTAXES).unwrap_or_default();
scope_iterator(ops, line, &mut self.stack, &self.highlighter)
}
/// Commits the last highlighted line.
pub fn commit(&mut self) {
self.commit = (self.state.clone(), self.stack.clone());
}
/// Resets the [`Stream`] highlighter.
pub fn reset(&mut self) {
self.state = parsing::ParseState::new(self.syntax);
self.stack = parsing::ScopeStack::new();
self.commit = (self.state.clone(), self.stack.clone());
}
}

1
widget/Cargo.toml
View file

@ -33,6 +33,7 @@ iced_renderer.workspace = true
iced_runtime.workspace = true
num-traits.workspace = true
log.workspace = true
rustc-hash.workspace = true
thiserror.workspace = true
unicode-segmentation.workspace = true

14
widget/src/container.rs
View file

@ -107,8 +107,8 @@ where
}
/// Sets the [`Id`] of the [`Container`].
pub fn id(mut self, id: Id) -> Self {
self.id = Some(id);
pub fn id(mut self, id: impl Into<Id>) -> Self {
self.id = Some(id.into());
self
}
@ -480,9 +480,17 @@ impl From<Id> for widget::Id {
}
}
impl From<&'static str> for Id {
fn from(value: &'static str) -> Self {
Id::new(value)
}
}
/// Produces a [`Task`] that queries the visible screen bounds of the
/// [`Container`] with the given [`Id`].
pub fn visible_bounds(id: Id) -> Task<Option<Rectangle>> {
pub fn visible_bounds(id: impl Into<Id>) -> Task<Option<Rectangle>> {
let id = id.into();
struct VisibleBounds {
target: widget::Id,
depth: usize,

261
widget/src/markdown.rs
View file

@ -47,6 +47,7 @@
//! }
//! }
//! ```
#![allow(missing_docs)]
use crate::core::border;
use crate::core::font::{self, Font};
use crate::core::padding;
@ -56,13 +57,55 @@ use crate::core::{
};
use crate::{column, container, rich_text, row, scrollable, span, text};
use std::borrow::BorrowMut;
use std::cell::{Cell, RefCell};
use std::ops::Range;
use std::sync::Arc;
pub use core::text::Highlight;
pub use pulldown_cmark::HeadingLevel;
pub use url::Url;
#[derive(Debug, Default)]
pub struct Content {
items: Vec<Item>,
state: State,
}
impl Content {
pub fn new() -> Self {
Self::default()
}
pub fn parse(markdown: &str) -> Self {
let mut state = State::default();
let items = parse_with(&mut state, markdown).collect();
Self { items, state }
}
pub fn push_str(&mut self, markdown: &str) {
if markdown.is_empty() {
return;
}
// Append to last leftover text
let mut leftover = std::mem::take(&mut self.state.leftover);
leftover.push_str(markdown);
// Pop the last item
let _ = self.items.pop();
// Re-parse last item and new text
let new_items = parse_with(&mut self.state, &leftover);
self.items.extend(new_items);
}
pub fn items(&self) -> &[Item] {
&self.items
}
}
/// A Markdown item.
#[derive(Debug, Clone)]
pub enum Item {
@ -73,7 +116,7 @@ pub enum Item {
/// A code block.
///
/// You can enable the `highlighter` feature for syntax highlighting.
CodeBlock(Text),
CodeBlock(Vec<Text>),
/// A list.
List {
/// The first number of the list, if it is ordered.
@ -232,12 +275,109 @@ impl Span {
/// }
/// ```
pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
parse_with(State::default(), markdown)
}
#[derive(Debug, Default)]
struct State {
leftover: String,
#[cfg(feature = "highlighter")]
highlighter: Option<Highlighter>,
}
#[cfg(feature = "highlighter")]
#[derive(Debug)]
struct Highlighter {
lines: Vec<(String, Vec<Span>)>,
language: String,
parser: iced_highlighter::Stream,
current: usize,
}
#[cfg(feature = "highlighter")]
impl Highlighter {
pub fn new(language: &str) -> Self {
Self {
lines: Vec::new(),
parser: iced_highlighter::Stream::new(
&iced_highlighter::Settings {
theme: iced_highlighter::Theme::Base16Ocean,
token: language.to_string(),
},
),
language: language.to_owned(),
current: 0,
}
}
pub fn prepare(&mut self) {
self.current = 0;
}
pub fn highlight_line(&mut self, text: &str) -> &[Span] {
match self.lines.get(self.current) {
Some(line) if line.0 == text => {}
_ => {
if self.current + 1 < self.lines.len() {
log::debug!("Resetting highlighter...");
self.parser.reset();
self.lines.truncate(self.current);
for line in &self.lines {
log::debug!(
"Refeeding {n} lines",
n = self.lines.len()
);
let _ = self.parser.highlight_line(&line.0);
}
}
log::trace!("Parsing: {text}", text = text.trim_end());
if self.current + 1 < self.lines.len() {
self.parser.commit();
}
let mut spans = Vec::new();
for (range, highlight) in self.parser.highlight_line(text) {
spans.push(Span::Highlight {
text: text[range].to_owned(),
color: highlight.color(),
font: highlight.font(),
});
}
if self.current + 1 == self.lines.len() {
let _ = self.lines.pop();
}
self.lines.push((text.to_owned(), spans));
}
}
self.current += 1;
&self
.lines
.get(self.current - 1)
.expect("Line must be parsed")
.1
}
}
fn parse_with<'a>(
mut state: impl BorrowMut<State> + 'a,
markdown: &'a str,
) -> impl Iterator<Item = Item> + 'a {
struct List {
start: Option<u64>,
items: Vec<Vec<Item>>,
}
let mut spans = Vec::new();
let mut code = Vec::new();
let mut strong = false;
let mut emphasis = false;
let mut strikethrough = false;
@ -255,10 +395,16 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
| pulldown_cmark::Options::ENABLE_PLUSES_DELIMITED_METADATA_BLOCKS
| pulldown_cmark::Options::ENABLE_TABLES
| pulldown_cmark::Options::ENABLE_STRIKETHROUGH,
);
)
.into_offset_iter();
let produce = |lists: &mut Vec<List>, item| {
let produce = move |state: &mut State,
lists: &mut Vec<List>,
item,
source: Range<usize>| {
if lists.is_empty() {
state.leftover = markdown[source.start..].to_owned();
Some(item)
} else {
lists
@ -275,7 +421,7 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
// We want to keep the `spans` capacity
#[allow(clippy::drain_collect)]
parser.filter_map(move |event| match event {
parser.filter_map(move |(event, source)| match event {
pulldown_cmark::Event::Start(tag) => match tag {
pulldown_cmark::Tag::Strong if !metadata && !table => {
strong = true;
@ -309,8 +455,10 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
None
} else {
produce(
state.borrow_mut(),
&mut lists,
Item::Paragraph(Text::new(spans.drain(..).collect())),
source,
)
};
@ -334,17 +482,34 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
) if !metadata && !table => {
#[cfg(feature = "highlighter")]
{
use iced_highlighter::Highlighter;
use text::Highlighter as _;
highlighter = Some({
let mut highlighter = state
.borrow_mut()
.highlighter
.take()
.filter(|highlighter| {
highlighter.language == _language.as_ref()
})
.unwrap_or_else(|| Highlighter::new(&_language));
highlighter =
Some(Highlighter::new(&iced_highlighter::Settings {
theme: iced_highlighter::Theme::Base16Ocean,
token: _language.to_string(),
}));
highlighter.prepare();
highlighter
});
}
let prev = if spans.is_empty() {
None
} else {
produce(
state.borrow_mut(),
&mut lists,
Item::Paragraph(Text::new(spans.drain(..).collect())),
source,
)
};
prev
}
pulldown_cmark::Tag::MetadataBlock(_) => {
metadata = true;
@ -359,8 +524,10 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
pulldown_cmark::Event::End(tag) => match tag {
pulldown_cmark::TagEnd::Heading(level) if !metadata && !table => {
produce(
state.borrow_mut(),
&mut lists,
Item::Heading(level, Text::new(spans.drain(..).collect())),
source,
)
}
pulldown_cmark::TagEnd::Strong if !metadata && !table => {
@ -381,8 +548,10 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
}
pulldown_cmark::TagEnd::Paragraph if !metadata && !table => {
produce(
state.borrow_mut(),
&mut lists,
Item::Paragraph(Text::new(spans.drain(..).collect())),
source,
)
}
pulldown_cmark::TagEnd::Item if !metadata && !table => {
@ -390,8 +559,10 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
None
} else {
produce(
state.borrow_mut(),
&mut lists,
Item::Paragraph(Text::new(spans.drain(..).collect())),
source,
)
}
}
@ -399,22 +570,26 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
let list = lists.pop().expect("list context");
produce(
state.borrow_mut(),
&mut lists,
Item::List {
start: list.start,
items: list.items,
},
source,
)
}
pulldown_cmark::TagEnd::CodeBlock if !metadata && !table => {
#[cfg(feature = "highlighter")]
{
highlighter = None;
state.borrow_mut().highlighter = highlighter.take();
}
produce(
state.borrow_mut(),
&mut lists,
Item::CodeBlock(Text::new(spans.drain(..).collect())),
Item::CodeBlock(code.drain(..).collect()),
source,
)
}
pulldown_cmark::TagEnd::MetadataBlock(_) => {
@ -430,18 +605,10 @@ pub fn parse(markdown: &str) -> impl Iterator<Item = Item> + '_ {
pulldown_cmark::Event::Text(text) if !metadata && !table => {
#[cfg(feature = "highlighter")]
if let Some(highlighter) = &mut highlighter {
use text::Highlighter as _;
for (range, highlight) in
highlighter.highlight_line(text.as_ref())
{
let span = Span::Highlight {
text: text[range].to_owned(),
color: highlight.color(),
font: highlight.font(),
};
spans.push(span);
for line in text.lines() {
code.push(Text::new(
highlighter.highlight_line(line).to_vec(),
));
}
return None;
@ -518,6 +685,8 @@ pub struct Settings {
pub h6_size: Pixels,
/// The text size used in code blocks.
pub code_size: Pixels,
/// The spacing to be used between elements.
pub spacing: Pixels,
}
impl Settings {
@ -538,6 +707,7 @@ impl Settings {
h5_size: text_size,
h6_size: text_size,
code_size: text_size * 0.75,
spacing: text_size * 0.875,
}
}
}
@ -640,10 +810,9 @@ where
h5_size,
h6_size,
code_size,
spacing,
} = settings;
let spacing = text_size * 0.625;
let blocks = items.into_iter().enumerate().map(|(i, item)| match item {
Item::Heading(level, heading) => {
container(rich_text(heading.spans(style)).size(match level {
@ -666,11 +835,21 @@ where
}
Item::List { start: None, items } => {
column(items.iter().map(|items| {
row![text("•").size(text_size), view(items, settings, style)]
row![
text("•").size(text_size),
view(
items,
Settings {
spacing: settings.spacing * 0.6,
..settings
},
style
)
]
.spacing(spacing)
.into()
}))
.spacing(spacing)
.spacing(spacing * 0.75)
.into()
}
Item::List {
@ -679,20 +858,28 @@ where
} => column(items.iter().enumerate().map(|(i, items)| {
row![
text!("{}.", i as u64 + *start).size(text_size),
view(items, settings, style)
view(
items,
Settings {
spacing: settings.spacing * 0.6,
..settings
},
style
)
]
.spacing(spacing)
.into()
}))
.spacing(spacing)
.spacing(spacing * 0.75)
.into(),
Item::CodeBlock(code) => container(
Item::CodeBlock(lines) => container(
scrollable(
container(
rich_text(code.spans(style))
container(column(lines.iter().map(|line| {
rich_text(line.spans(style))
.font(Font::MONOSPACE)
.size(code_size),
)
.size(code_size)
.into()
})))
.padding(spacing.0 / 2.0),
)
.direction(scrollable::Direction::Horizontal(
@ -707,7 +894,7 @@ where
.into(),
});
Element::new(column(blocks).width(Length::Fill).spacing(text_size))
Element::new(column(blocks).spacing(spacing))
}
/// The theme catalog of Markdown items.

47
widget/src/scrollable.rs
View file

@ -144,8 +144,8 @@ where
}
/// Sets the [`Id`] of the [`Scrollable`].
pub fn id(mut self, id: Id) -> Self {
self.id = Some(id);
pub fn id(mut self, id: impl Into<Id>) -> Self {
self.id = Some(id.into());
self
}
@ -788,13 +788,7 @@ where
(x, y)
};
let is_vertical = match self.direction {
Direction::Vertical(_) => true,
Direction::Horizontal(_) => false,
Direction::Both { .. } => !is_shift_pressed,
};
let movement = if is_vertical {
let movement = if !is_shift_pressed {
Vector::new(x, y)
} else {
Vector::new(y, x)
@ -999,9 +993,9 @@ where
content_layout,
cursor,
&Rectangle {
y: bounds.y + translation.y,
x: bounds.x + translation.x,
..bounds
y: visible_bounds.y + translation.y,
x: visible_bounds.x + translation.x,
..visible_bounds
},
);
},
@ -1103,9 +1097,9 @@ where
content_layout,
cursor,
&Rectangle {
x: bounds.x + translation.x,
y: bounds.y + translation.y,
..bounds
x: visible_bounds.x + translation.x,
y: visible_bounds.y + translation.y,
..visible_bounds
},
);
}
@ -1228,25 +1222,36 @@ impl From<Id> for widget::Id {
}
}
impl From<&'static str> for Id {
fn from(id: &'static str) -> Self {
Self::new(id)
}
}
/// Produces a [`Task`] that snaps the [`Scrollable`] with the given [`Id`]
/// to the provided [`RelativeOffset`].
pub fn snap_to<T>(id: Id, offset: RelativeOffset) -> Task<T> {
task::effect(Action::widget(operation::scrollable::snap_to(id.0, offset)))
pub fn snap_to<T>(id: impl Into<Id>, offset: RelativeOffset) -> Task<T> {
task::effect(Action::widget(operation::scrollable::snap_to(
id.into().0,
offset,
)))
}
/// Produces a [`Task`] that scrolls the [`Scrollable`] with the given [`Id`]
/// to the provided [`AbsoluteOffset`].
pub fn scroll_to<T>(id: Id, offset: AbsoluteOffset) -> Task<T> {
pub fn scroll_to<T>(id: impl Into<Id>, offset: AbsoluteOffset) -> Task<T> {
task::effect(Action::widget(operation::scrollable::scroll_to(
id.0, offset,
id.into().0,
offset,
)))
}
/// Produces a [`Task`] that scrolls the [`Scrollable`] with the given [`Id`]
/// by the provided [`AbsoluteOffset`].
pub fn scroll_by<T>(id: Id, offset: AbsoluteOffset) -> Task<T> {
pub fn scroll_by<T>(id: impl Into<Id>, offset: AbsoluteOffset) -> Task<T> {
task::effect(Action::widget(operation::scrollable::scroll_by(
id.0, offset,
id.into().0,
offset,
)))
}

7
widget/src/stack.rs
View file

@ -216,6 +216,8 @@ where
viewport: &Rectangle,
) {
let is_over = cursor.is_over(layout.bounds());
let is_mouse_movement =
matches!(event, Event::Mouse(mouse::Event::CursorMoved { .. }));
for ((child, state), layout) in self
.children
@ -235,7 +237,10 @@ where
viewport,
);
if is_over && cursor != mouse::Cursor::Unavailable {
if is_over
&& !is_mouse_movement
&& cursor != mouse::Cursor::Unavailable
{
let interaction = child.as_widget().mouse_interaction(
state, layout, cursor, viewport, renderer,
);

91
widget/src/text/rich.rs
View file

@ -30,6 +30,7 @@ where
align_y: alignment::Vertical,
wrapping: Wrapping,
class: Theme::Class<'a>,
hovered_link: Option<usize>,
}
impl<'a, Link, Theme, Renderer> Rich<'a, Link, Theme, Renderer>
@ -52,6 +53,7 @@ where
align_y: alignment::Vertical::Top,
wrapping: Wrapping::default(),
class: Theme::default(),
hovered_link: None,
}
}
@ -236,22 +238,21 @@ where
theme: &Theme,
defaults: &renderer::Style,
layout: Layout<'_>,
cursor: mouse::Cursor,
_cursor: mouse::Cursor,
viewport: &Rectangle,
) {
if !layout.bounds().intersects(viewport) {
return;
}
let state = tree
.state
.downcast_ref::<State<Link, Renderer::Paragraph>>();
let style = theme.style(&self.class);
let hovered_span = cursor
.position_in(layout.bounds())
.and_then(|position| state.paragraph.hit_span(position));
for (index, span) in self.spans.as_ref().as_ref().iter().enumerate() {
let is_hovered_link =
span.link.is_some() && Some(index) == hovered_span;
let is_hovered_link = Some(index) == self.hovered_link;
if span.highlight.is_some()
|| span.underline
@ -365,39 +366,47 @@ where
shell: &mut Shell<'_, Link>,
_viewport: &Rectangle,
) {
let was_hovered = self.hovered_link.is_some();
if let Some(position) = cursor.position_in(layout.bounds()) {
let state = tree
.state
.downcast_ref::<State<Link, Renderer::Paragraph>>();
self.hovered_link =
state.paragraph.hit_span(position).and_then(|span| {
if self.spans.as_ref().as_ref().get(span)?.link.is_some() {
Some(span)
} else {
None
}
});
} else {
self.hovered_link = None;
}
if was_hovered != self.hovered_link.is_some() {
shell.request_redraw();
}
match event {
Event::Mouse(mouse::Event::ButtonPressed(mouse::Button::Left)) => {
if let Some(position) = cursor.position_in(layout.bounds()) {
let state = tree
.state
.downcast_mut::<State<Link, Renderer::Paragraph>>();
if let Some(span) = state.paragraph.hit_span(position) {
if self
.spans
.as_ref()
.as_ref()
.get(span)
.is_some_and(|span| span.link.is_some())
{
state.span_pressed = Some(span);
if self.hovered_link.is_some() {
state.span_pressed = self.hovered_link;
shell.capture_event();
}
}
}
}
Event::Mouse(mouse::Event::ButtonReleased(mouse::Button::Left)) => {
let state = tree
.state
.downcast_mut::<State<Link, Renderer::Paragraph>>();
if let Some(span_pressed) = state.span_pressed {
state.span_pressed = None;
if let Some(position) = cursor.position_in(layout.bounds())
{
match state.paragraph.hit_span(position) {
Some(span) if span == span_pressed => {
match state.span_pressed {
Some(span) if Some(span) == self.hovered_link => {
if let Some(link) = self
.spans
.as_ref()
@ -410,8 +419,8 @@ where
}
_ => {}
}
}
}
state.span_pressed = None;
}
_ => {}
}
@ -419,30 +428,18 @@ where
fn mouse_interaction(
&self,
tree: &Tree,
layout: Layout<'_>,
cursor: mouse::Cursor,
_tree: &Tree,
_layout: Layout<'_>,
_cursor: mouse::Cursor,
_viewport: &Rectangle,
_renderer: &Renderer,
) -> mouse::Interaction {
if let Some(position) = cursor.position_in(layout.bounds()) {
let state = tree
.state
.downcast_ref::<State<Link, Renderer::Paragraph>>();
if let Some(span) = state
.paragraph
.hit_span(position)
.and_then(|span| self.spans.as_ref().as_ref().get(span))
{
if span.link.is_some() {
return mouse::Interaction::Pointer;
}
}
}
if self.hovered_link.is_some() {
mouse::Interaction::Pointer
} else {
mouse::Interaction::None
}
}
}
fn layout<Link, Renderer>(

36
widget/src/text_editor.rs
View file

@ -110,6 +110,8 @@ pub struct TextEditor<
line_height: LineHeight,
width: Length,
height: Length,
min_height: f32,
max_height: f32,
padding: Padding,
wrapping: Wrapping,
class: Theme::Class<'a>,
@ -139,6 +141,8 @@ where
line_height: LineHeight::default(),
width: Length::Fill,
height: Length::Shrink,
min_height: 0.0,
max_height: f32::INFINITY,
padding: Padding::new(5.0),
wrapping: Wrapping::default(),
class: Theme::default(),
@ -169,15 +173,27 @@ where
self
}
/// Sets the width of the [`TextEditor`].
pub fn width(mut self, width: impl Into<Pixels>) -> Self {
self.width = Length::from(width.into());
self
}
/// Sets the height of the [`TextEditor`].
pub fn height(mut self, height: impl Into<Length>) -> Self {
self.height = height.into();
self
}
/// Sets the width of the [`TextEditor`].
pub fn width(mut self, width: impl Into<Pixels>) -> Self {
self.width = Length::from(width.into());
/// Sets the minimum height of the [`TextEditor`].
pub fn min_height(mut self, min_height: impl Into<Pixels>) -> Self {
self.min_height = min_height.into().0;
self
}
/// Sets the maximum height of the [`TextEditor`].
pub fn max_height(mut self, max_height: impl Into<Pixels>) -> Self {
self.max_height = max_height.into().0;
self
}
@ -265,6 +281,8 @@ where
line_height: self.line_height,
width: self.width,
height: self.height,
min_height: self.min_height,
max_height: self.max_height,
padding: self.padding,
wrapping: self.wrapping,
class: self.class,
@ -549,7 +567,11 @@ where
state.highlighter_settings = self.highlighter_settings.clone();
}
let limits = limits.width(self.width).height(self.height);
let limits = limits
.width(self.width)
.height(self.height)
.min_height(self.min_height)
.max_height(self.max_height);
internal.editor.update(
limits.shrink(self.padding).max(),
@ -768,6 +790,10 @@ where
}
}
if !matches!(binding, Binding::Unfocus) {
shell.capture_event();
}
apply_binding(
binding,
self.content,
@ -780,8 +806,6 @@ where
if let Some(focus) = &mut state.focus {
focus.updated_at = Instant::now();
}
shell.capture_event();
}
}
}