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Don't represent editor's scroll top anchor as an option

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Use Anchor::min as the special value representing a scroll top of zero
This commit is contained in:
Max Brunsfeld 2022-03-22 13:31:13 -07:00
parent 0a3f013e00
commit fc811e0856
2 changed files with 19 additions and 30 deletions
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23
crates/editor/src/editor.rs
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@ -438,7 +438,7 @@ pub struct Editor {
select_larger_syntax_node_stack: Vec<Box<[Selection<usize>]>>,
active_diagnostics: Option<ActiveDiagnosticGroup>,
scroll_position: Vector2F,
scroll_top_anchor: Option<Anchor>,
scroll_top_anchor: Anchor,
autoscroll_request: Option<Autoscroll>,
soft_wrap_mode_override: Option<settings::SoftWrap>,
get_field_editor_theme: Option<GetFieldEditorTheme>,
@ -473,7 +473,7 @@ pub struct EditorSnapshot {
pub placeholder_text: Option<Arc<str>>,
is_focused: bool,
scroll_position: Vector2F,
scroll_top_anchor: Option<Anchor>,
scroll_top_anchor: Anchor,
}
#[derive(Clone)]
@ -915,7 +915,7 @@ impl Editor {
get_field_editor_theme,
project,
scroll_position: Vector2F::zero(),
scroll_top_anchor: None,
scroll_top_anchor: Anchor::min(),
autoscroll_request: None,
focused: false,
show_local_cursors: false,
@ -1020,7 +1020,7 @@ impl Editor {
let map = self.display_map.update(cx, |map, cx| map.snapshot(cx));
if scroll_position.y() == 0. {
self.scroll_top_anchor = None;
self.scroll_top_anchor = Anchor::min();
self.scroll_position = scroll_position;
} else {
let scroll_top_buffer_offset =
@ -1032,19 +1032,14 @@ impl Editor {
scroll_position.x(),
scroll_position.y() - anchor.to_display_point(&map).row() as f32,
);
self.scroll_top_anchor = Some(anchor);
self.scroll_top_anchor = anchor;
}
cx.emit(Event::ScrollPositionChanged { local: true });
cx.notify();
}
fn set_scroll_top_anchor(
&mut self,
anchor: Option<Anchor>,
local: bool,
cx: &mut ViewContext<Self>,
) {
fn set_scroll_top_anchor(&mut self, anchor: Anchor, local: bool, cx: &mut ViewContext<Self>) {
self.scroll_position = Vector2F::zero();
self.scroll_top_anchor = anchor;
cx.emit(Event::ScrollPositionChanged { local });
@ -5636,10 +5631,10 @@ impl Deref for EditorSnapshot {
fn compute_scroll_position(
snapshot: &DisplaySnapshot,
mut scroll_position: Vector2F,
scroll_top_anchor: &Option<Anchor>,
scroll_top_anchor: &Anchor,
) -> Vector2F {
if let Some(anchor) = scroll_top_anchor {
let scroll_top = anchor.to_display_point(snapshot).row() as f32;
if *scroll_top_anchor != Anchor::min() {
let scroll_top = scroll_top_anchor.to_display_point(snapshot).row() as f32;
scroll_position.set_y(scroll_top + scroll_position.y());
} else {
scroll_position.set_y(0.);