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use super::*;
use crate::AppExt as _;
use std::rc::Rc;
use ui::AppExt as _;
impl Render for Editor {
fn render(&mut self, window: &mut Window, cx: &mut Context<Self>) -> impl IntoElement {
if let Some(mention) = &mut self.mention {
mention.refresh(cx);
}
let theme = Theme::of(cx).clone();
let layout = cx.editor_layout();
let focused = self.focus_handle.is_focused(window);
// The only place the blink starts: `caret_moved` drops the task, so the
// next render brings it back in phase, lit beat first.
if focused && cx.caret_blink() {
if self.blink.is_none() {
self.start_blink(cx);
}
} else {
self.blink = None;
self.caret_on = true;
}
let selection = focused.then_some(self.selection);
// The source line a reveal owed in source mode lands on.
let reveal_line = match self.mode {
Mode::Source => {
self.refresh_source_view(cx);
self.source_view().line_of(self.selection.head.offset)
}
Mode::Blocks => {
self.drop_source_view();
0
}
};
// gpui ends an outside file drag — left the window or released
// elsewhere — without a drop here, so the indicator goes with it.
if !cx.has_active_drag() {
self.dropping = None;
}
// Typed text and IME reach an entity only through an input handler
// registered during *paint*, against the bounds it should be anchored
// to. There is no custom element here to do that from, so a zero-cost
// canvas over the document supplies the paint phase. Without this the
// key bindings still fire and nothing types.
let handle = self.focus_handle.clone();
let entity = cx.entity();
let in_drag = self.in_drag();
let input = canvas(
|_, _, _| (),
move |bounds, _, window, cx| {
// `on_mouse_move` hears the pointer only over this box, and a
// drag goes on past it. Registering it is paint's alone.
if in_drag {
let entity = entity.clone();
window.on_mouse_event(move |event: &gpui::MouseMoveEvent, phase, _, cx| {
if phase == gpui::DispatchPhase::Bubble && event.dragging() {
entity.update(cx, |this, cx| this.drag_to(event.position, cx));
}
});
}
// The gutter handle is placed from positions recorded in window
// coordinates, so the box they have to be measured against is
// taken here — the one place that knows it.
entity.update(cx, |this, _| {
this.origin = bounds.origin;
this.width = bounds.size.width;
});
window.handle_input(
&handle,
ElementInputHandler::new(bounds, entity.clone()),
cx,
);
},
)
.absolute()
.size_full();
// A tab stop, so the editor is reachable the same way every other
// control in the library is.
let handle = self.focus_handle.clone().tab_stop(true);
div()
// Stateful only so the pointer leaving can be heard: `on_hover` is
// what tells the gutter handle to stop pointing at a block the
// pointer left behind.
.id("bezel-editor")
// The mark is what keeps `tab`: without it traversal answers the
// key first and the caret never sees it.
.key_context(key_context())
.track_focus(&handle)
// Tracking focus does not take it. Without this, clicking into the
// document blurs the editor instead of putting a caret in it, and
// the caret vanishes on the first click.
.on_mouse_down(
MouseButton::Left,
cx.listener(|this, event: &gpui::MouseDownEvent, window, cx| {
// The handle's own listener runs first and claims the
// press; without the flag this would close the menu it
// just opened. `ui::popover::Popup` solves it the same way.
if std::mem::take(&mut this.press_claimed) {
this.focus_handle.clone().focus(window, cx);
} else {
this.pressed(
event.position,
event.click_count,
event.modifiers,
window,
cx,
);
}
// What `press` reads to skip a press this box already
// took. It also stops gpui's own focus transfer, which runs
// after this listener, so both arms focus by hand.
window.prevent_default();
}),
)
.on_mouse_down(
MouseButton::Right,
cx.listener(|this, event: &gpui::MouseDownEvent, window, cx| {
if this.blocks()
&& let Some((block, Part::Cell { row, column })) =
this.layouts.cell_at(event.position)
{
this.table_menu.open(Dropped::new(
(block, TableTarget::Cell { row, column }),
event.position,
));
this.focus_handle.focus(window, cx);
} else {
this.right_pressed(event.position, window, cx);
}
window.prevent_default();
cx.stop_propagation();
cx.notify();
}),
)
// The drag has to be tracked from the container rather than from a
// payload: a text selection has nothing to carry, and gpui's drag
// payload is for things being dropped somewhere.
.on_hover(cx.listener(|this, hovered: &bool, _, cx| {
if !*hovered && (this.hovered.take().is_some() | this.hovered_cell.take().is_some())
{
cx.notify();
}
if !*hovered && this.over_anchor.take().is_some() {
cx.emit(EditorEvent::AnchorHovered(None));
cx.notify();
}
}))
.on_mouse_move(cx.listener(|this, event: &gpui::MouseMoveEvent, _, cx| {
// Ahead of every drag branch below, because the pointer's shape
// is about where it *is* rather than about what it is doing.
let over_text = this.layouts.over_text(event.position);
if over_text != this.over_text {
this.over_text = over_text;
cx.notify();
}
// A drag in flight is followed by the window-wide listener
// `render` registers; otherwise the pointer only decides which
// block wears the handle.
if this.in_drag() {
return;
}
let over = match this.over_text {
true => this.anchor_at(event.position),
false => None,
};
if over != this.over_anchor {
this.over_anchor = over;
cx.emit(EditorEvent::AnchorHovered(over));
// The pointer's shape follows the anchor under it.
cx.notify();
}
let hovered = this.layouts.block_at(event.position);
let cell = this.layouts.cell_at(event.position).or_else(|| {
// Keep the target while crossing its control lanes.
this.hovered_cell.filter(|(block, _)| {
this.layouts
.block_bounds(*block)
.is_some_and(|bounds| bounds.contains(&event.position))
})
});
if hovered != this.hovered || cell != this.hovered_cell {
this.hovered = hovered;
this.hovered_cell = cell;
cx.notify();
}
}))
// Both, because a release can land anywhere on screen and only the
// first fires over the editor. A resize left running would leave
// its stand-in picture painted over the document for good.
.on_mouse_up_out(
MouseButton::Left,
cx.listener(|this, event: &gpui::MouseUpEvent, window, cx| {
this.drag_table_to(event.position, cx);
this.dragging = None;
this.drop_resize(window, cx);
this.drop_height(cx);
this.drop_table_drag(cx);
}),
)
.on_mouse_up(
MouseButton::Left,
cx.listener(|this, event: &gpui::MouseUpEvent, window, cx| {
this.drag_table_to(event.position, cx);
this.dragging = None;
if this.drop_table_drag(cx) {
return;
}
if this.drop_resize(window, cx) {
return;
}
if this.drop_height(cx) {
return;
}
let Some((from, to)) = this.lifted.take() else {
return;
};
if from == to {
// A press that never moved is a click, and a click on
// the handle is what opens the menu — unless that same
// press is what dismissed it, which the note taken on
// the way down is the only way to tell.
if !this.block_menu.take_press_was_open() {
let rows = crate::slash::Rows::new(crate::block_menu::installed(cx));
this.block_menu
.open(Dropped::new((from, rows), event.position));
}
return cx.notify();
}
this.edit(EditKind::Structure, cx, |this| {
// `move_block` steps one sibling at a time, so a drop
// several blocks away is that many steps. Bounded by
// the block count, which no drag can exceed.
let delta = if to > from { 1 } else { -1 };
let mut at = from;
// Each step is its own move, so each is its own delta —
// folding them into one would have to compose the
// hops, and they are already in order.
let mut deltas = Vec::new();
for _ in 0..this.doc.blocks.len() {
let span = this.doc.subtree(at);
let Some(next) = this.doc.edit().move_block(at, delta) else {
break;
};
deltas.push(Delta::Moved {
at: span,
to: Some(next),
});
at = next;
if (delta > 0 && at >= to) || (delta < 0 && at <= to) {
break;
}
}
this.selection =
Selection::at(Cursor::new(at, Part::Body, 0).clamp(&this.doc));
deltas
});
}),
)
.on_action(cx.listener(Self::backspace))
.on_action(cx.listener(Self::delete))
.on_action(cx.listener(|this, _: &KillLine, _, cx| this.delete_to(true, line_end, cx)))
.on_action(cx.listener(|this, _: &DeleteWordLeft, _, cx| {
this.delete_to(false, Cursor::word_left, cx)
}))
.on_action(cx.listener(|this, _: &DeleteWordRight, _, cx| {
this.delete_to(true, Cursor::word_right, cx)
}))
.on_action(cx.listener(|this, _: &DeleteToHome, _, cx| {
this.delete_to(false, |at, _| at.home(), cx)
}))
.on_action(cx.listener(Self::split_block))
.on_action(cx.listener(Self::soft_break))
.on_action(cx.listener(Self::insert_paragraph))
.on_action(cx.listener(Self::indent))
.on_action(cx.listener(Self::increase_text_size))
.on_action(cx.listener(Self::decrease_text_size))
.on_action(cx.listener(Self::reset_text_size))
.on_action(cx.listener(Self::outdent))
.on_action(cx.listener(Self::dismiss))
.on_action(cx.listener(Self::select_all))
.on_action(cx.listener(Self::copy))
.on_action(cx.listener(Self::cut))
.on_action(cx.listener(Self::paste))
.on_action(cx.listener(Self::undo))
.on_action(cx.listener(Self::redo))
.on_action(cx.listener(Self::confirm_url))
.on_action(cx.listener(Self::cancel_url))
// A file crossing the document lights the same indicator a lifted
// block does, so a drop from outside lands where it looks like it
// will.
.on_drag_move(cx.listener(
|this, event: &gpui::DragMoveEvent<gpui::ExternalPaths>, _, cx| {
let at = event.event.position;
let over = event
.bounds
.contains(&at)
.then(|| this.layouts.block_at(at))
.flatten();
if over != this.dropping {
this.dropping = over;
cx.notify();
}
},
))
.on_drop(
cx.listener(|this, paths: &gpui::ExternalPaths, window, cx| {
this.focus_handle.clone().focus(window, cx);
this.drop_paths(paths, cx);
}),
)
.on_action(cx.listener(|this, _: &ToggleBold, _, cx| this.toggle_mark(Mark::Bold, cx)))
.on_action(
cx.listener(|this, _: &ToggleItalic, _, cx| this.toggle_mark(Mark::Italic, cx)),
)
.on_action(
cx.listener(|this, _: &ToggleStrike, _, cx| this.toggle_mark(Mark::Strike, cx)),
)
.on_action(cx.listener(|this, _: &ToggleCode, _, cx| this.toggle_mark(Mark::Code, cx)))
.on_action(cx.listener(|this, _: &ToggleHighlight, _, cx| {
if this.marks.delimiter(HIGHLIGHT_MARK).is_some() {
this.toggle_mark(Mark::Custom(HIGHLIGHT_MARK.into()), cx);
}
}))
.on_action(cx.listener(|this, _: &MoveBlockUp, _, cx| {
this.move_block(this.cursor().block, -1, cx)
}))
.on_action(cx.listener(|this, _: &MoveBlockDown, _, cx| {
this.move_block(this.cursor().block, 1, cx)
}))
.on_action(cx.listener(|this, _: &DuplicateBlock, _, cx| {
this.duplicate_block(this.cursor().block, cx)
}))
.on_action(cx.listener(|this, _: &RemoveBlock, _, cx| {
this.remove_block(this.cursor().block, cx)
}))
// Motion is one method with a `Cursor` function and an "extend"
// flag, so a shift variant cannot drift from the key it shadows.
.on_action(cx.listener(|this, _: &Left, _, cx| {
if !this.menu_side(false, cx) {
this.horizontal(false, false, cx)
}
}))
.on_action(cx.listener(|this, _: &Right, _, cx| {
if !this.menu_side(true, cx) {
this.horizontal(true, false, cx)
}
}))
.on_action(cx.listener(|this, _: &Up, _, cx| this.vertical(false, false, cx)))
.on_action(cx.listener(|this, _: &Down, _, cx| this.vertical(true, false, cx)))
.on_action(cx.listener(|this, _: &Home, _, cx| this.row_edge(false, false, cx)))
.on_action(cx.listener(|this, _: &End, _, cx| this.row_edge(true, false, cx)))
.on_action(cx.listener(|this, _: &DocumentStart, _, cx| {
this.moved(false, |_, doc| Selection::all(doc).anchor, cx)
}))
.on_action(cx.listener(|this, _: &DocumentEnd, _, cx| {
this.moved(false, |_, doc| Selection::all(doc).head, cx)
}))
.on_action(
cx.listener(|this, _: &WordLeft, _, cx| this.moved(false, Cursor::word_left, cx)),
)
.on_action(
cx.listener(|this, _: &WordRight, _, cx| this.moved(false, Cursor::word_right, cx)),
)
.on_action(cx.listener(|this, _: &SelectLeft, _, cx| this.horizontal(false, true, cx)))
.on_action(cx.listener(|this, _: &SelectRight, _, cx| this.horizontal(true, true, cx)))
.on_action(cx.listener(|this, _: &SelectUp, _, cx| this.vertical(false, true, cx)))
.on_action(cx.listener(|this, _: &SelectDown, _, cx| this.vertical(true, true, cx)))
.on_action(cx.listener(|this, _: &SelectHome, _, cx| this.row_edge(false, true, cx)))
.on_action(cx.listener(|this, _: &SelectEnd, _, cx| this.row_edge(true, true, cx)))
.on_action(cx.listener(|this, _: &SelectDocumentStart, _, cx| {
this.moved(true, |_, doc| Selection::all(doc).anchor, cx)
}))
.on_action(cx.listener(|this, _: &SelectDocumentEnd, _, cx| {
this.moved(true, |_, doc| Selection::all(doc).head, cx)
}))
.on_action(cx.listener(|this, _: &SelectWordLeft, _, cx| {
this.moved(true, Cursor::word_left, cx)
}))
.on_action(cx.listener(|this, _: &SelectWordRight, _, cx| {
this.moved(true, Cursor::word_right, cx)
}))
.w_full()
// Text under the pointer, so the pointer says so — and only there,
// or while a drag is still sweeping one out. The editor's box
// reaches over its gutter, the margin beside a short line, a rule,
// an image and a card, none of which a caret can be put into.
// Where it has nothing to say it stays quiet rather than
// overriding the page with an arrow of its own. Over an actionable
// anchor it is a hand: a press there does what the app says.
.map(|el| {
if self.dragging.is_none() && self.over_actionable() {
el.cursor(CursorStyle::PointingHand)
} else if self.over_text || self.dragging.is_some() {
el.cursor(CursorStyle::IBeam)
} else {
el
}
})
// No focus ring. A ring says *widget*, and a document is not one —
// the caret already paints only while focused, so a box around the
// whole page is a second, louder signal for the same fact.
.relative()
.child(input)
// A height drag holds the resize cursor wherever the pointer
// runs, over the editor's text and the card's own cursors alike.
.when(self.sizing.is_some(), |el| {
el.child(
canvas(
|_, _, _| (),
|_, _, window, _| window.set_window_cursor_style(CursorStyle::ResizeUpDown),
)
.absolute()
.size_0(),
)
})
// The document is inset by the gutter so the handle has somewhere
// to sit *inside* the editor. Outside it the handle is clipped by
// any scrolling ancestor, and a pointer over it never reaches
// `on_mouse_move`, which fires only while this element is the one
// under the pointer.
.child(
div()
.w_full()
.pl(gpui::px(layout.text_inset))
.child(match self.mode {
// The source is one text, so it paints as one text —
// the same caret, the same clicks, no block chrome to
// suppress a piece at a time.
Mode::Source => markdown::render_source(
self.source_view(),
markdown::Editing {
selection,
caret_on: self.caret_on,
layouts: Some(&self.layouts),
annotations: &self.annotations(),
keep: if self.reveal.is_some() {
std::slice::from_ref(&reveal_line)
} else {
&[]
},
scroll: self.scroll.as_ref(),
typography: Some(cx.typography().scaled(
text_size::resolve(self.text_size, cx)
/ theme::base_text_size(),
)),
..Default::default()
},
cx,
),
Mode::Blocks => markdown::render_with(
&self.doc,
markdown::Editing {
selection,
caret_on: self.caret_on,
layouts: Some(&self.layouts),
annotations: &self.annotations(),
placeholder: focused.then(|| PLACEHOLDER.into()),
// A caret goes into the caption here, so it is always
// painted — an editor that could hide it would be
// hiding a place you can already be typing.
caption: markdown::Caption::Shown,
// The size is absolute, so the factor the ladder
// is already scaled by comes back out of it —
// otherwise the app's size and this one multiply.
typography: Some(cx.typography().scaled(
text_size::resolve(self.text_size, cx)
/ theme::base_text_size(),
)),
// The editor's own press hit-tests
// `checkbox_bounds`, which is what keeps a
// toggle in the undo history.
toggle: Some(markdown::Toggle::HitTested),
table_controls: true,
image_overlay: self.image_overlay.clone(),
image_overlay_corner: self.image_overlay_corner,
sizing: self.held_height(),
fence: Some(markdown::FenceHost {
rewrite: {
let editor = cx.entity().downgrade();
Rc::new(move |ix, code, _, cx| {
editor
.update(cx, |this, cx| this.set_code(ix, code, cx))
.ok();
})
},
resize: Some({
let editor = cx.entity().downgrade();
Rc::new(move |ix, y, _, cx| {
editor
.update(cx, |this, cx| this.start_height(ix, y, cx))
.ok();
})
}),
leave: {
let editor = cx.entity().downgrade();
Rc::new(move |ix, window, cx| {
editor
.update(cx, |this, cx| {
this.leave_block(ix, window, cx)
})
.ok();
})
},
}),
base: self.base.as_deref(),
// A reveal owed to a caret nobody is focused on
// still needs its block built to find it.
keep: if self.reveal.is_some() {
std::slice::from_ref(&self.selection.head.block)
} else {
&[]
},
scroll: self.scroll.as_ref(),
jump: Some({
let editor = cx.entity().downgrade();
Rc::new(move |ix, _, cx| {
let at = Selection::at(Cursor::new(ix, Part::Body, 0));
editor
.update(cx, |this, cx| this.select_to_top(at, cx))
.ok();
})
}),
..Default::default()
},
window,
cx,
),
}),
)
// Last, so the layouts it reads are this frame's rather than the
// one before — children paint in order.
.child(
canvas(|_, _, _| (), {
let entity = cx.entity();
move |_, _, window, cx| {
entity.update(cx, |this, cx| {
this.reveal_caret(window);
this.settle_handle(window, cx);
});
}
})
.absolute()
.size(gpui::px(0.0)),
)
.children(self.slash_menu(&theme, window, cx))
.children(self.mention_menu(&theme, window, cx))
.children(self.paste_menu(&theme, window, cx))
.children(self.url_prompt(&theme, cx))
.children(self.image_target(cx))
.children(self.resize_preview())
.children(self.handle(focused, &theme, cx))
.children(self.resize_handle(&theme, cx))
.children(self.drop_indicator(&theme))
.children(self.table_strips(&theme, cx))
.children(self.table_handles(&theme, cx))
.children(self.table_drop_indicator(&theme))
.children(self.dropdown(menu::Dropdown::Table, &theme, window, cx))
.children(self.language_chip(&theme, cx))
.children(self.dropdown(menu::Dropdown::Block, &theme, window, cx))
.children(self.dropdown(menu::Dropdown::Language, &theme, window, cx))
.children(self.dropdown(menu::Dropdown::Text, &theme, window, cx))
.children(self.dropdown(menu::Dropdown::Image, &theme, window, cx))
}
}