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authorGokul Soumya2021-08-21 05:21:20 +0000
committerGitHub2021-08-21 05:21:20 +0000
commitf9375f449c8b7bbf792c88b89903fe38d524f2e5 (patch)
tree71a2313a7a7cebc071dffd9e3423f407eb4192e0
parentac8bc541087f815a026b4c664c069d8806b9c5de (diff)
Refactor new Rect construction (#575)
* Refactor new Rect construction Introduces methods that can be chained to construct new Rects out of pre-existing ones * Clamp x and y to edges in Rect chop methods * Rename Rect clipping functions
-rw-r--r--helix-term/src/ui/editor.rs24
-rw-r--r--helix-term/src/ui/markdown.rs9
-rw-r--r--helix-term/src/ui/menu.rs8
-rw-r--r--helix-term/src/ui/picker.rs37
-rw-r--r--helix-view/src/graphics.rs87
-rw-r--r--helix-view/src/view.rs7
6 files changed, 119 insertions, 53 deletions
diff --git a/helix-term/src/ui/editor.rs b/helix-term/src/ui/editor.rs
index b0e6de3e..d01d08e8 100644
--- a/helix-term/src/ui/editor.rs
+++ b/helix-term/src/ui/editor.rs
@@ -108,13 +108,11 @@ impl EditorView {
self.render_diagnostics(doc, view, inner, surface, theme);
- let area = Rect::new(
- view.area.x,
- view.area.y + view.area.height.saturating_sub(1),
- view.area.width,
- 1,
- );
- self.render_statusline(doc, view, area, surface, theme, is_focused);
+ let statusline_area = view
+ .area
+ .clip_top(view.area.height.saturating_sub(1))
+ .clip_bottom(1); // -1 from bottom to remove commandline
+ self.render_statusline(doc, view, statusline_area, surface, theme, is_focused);
}
/// Get syntax highlights for a document in a view represented by the first line
@@ -528,12 +526,7 @@ impl EditorView {
let width = 80.min(viewport.width);
let height = 15.min(viewport.height);
paragraph.render(
- Rect::new(
- viewport.right() - width,
- viewport.y as u16 + 1,
- width,
- height,
- ),
+ Rect::new(viewport.right() - width, viewport.y + 1, width, height),
surface,
);
}
@@ -572,7 +565,7 @@ impl EditorView {
theme.get("ui.statusline.inactive")
};
// statusline
- surface.set_style(Rect::new(viewport.x, viewport.y, viewport.width, 1), style);
+ surface.set_style(viewport.with_height(1), style);
if is_focused {
surface.set_string(viewport.x + 1, viewport.y, mode, style);
}
@@ -1001,8 +994,7 @@ impl Component for EditorView {
surface.set_style(area, cx.editor.theme.get("ui.background"));
// if the terminal size suddenly changed, we need to trigger a resize
- cx.editor
- .resize(Rect::new(area.x, area.y, area.width, area.height - 1)); // - 1 to account for commandline
+ cx.editor.resize(area.clip_bottom(1)); // -1 from bottom for commandline
for (view, is_focused) in cx.editor.tree.views() {
let doc = cx.editor.document(view.doc).unwrap();
diff --git a/helix-term/src/ui/markdown.rs b/helix-term/src/ui/markdown.rs
index b7e29f21..28542cdc 100644
--- a/helix-term/src/ui/markdown.rs
+++ b/helix-term/src/ui/markdown.rs
@@ -13,7 +13,7 @@ use helix_core::{
Rope,
};
use helix_view::{
- graphics::{Color, Rect, Style},
+ graphics::{Color, Margin, Rect, Style},
Theme,
};
@@ -207,8 +207,11 @@ impl Component for Markdown {
.wrap(Wrap { trim: false })
.scroll((cx.scroll.unwrap_or_default() as u16, 0));
- let area = Rect::new(area.x + 1, area.y + 1, area.width - 2, area.height - 2);
- par.render(area, surface);
+ let margin = Margin {
+ vertical: 1,
+ horizontal: 1,
+ };
+ par.render(area.inner(&margin), surface);
}
fn required_size(&mut self, viewport: (u16, u16)) -> Option<(u16, u16)> {
diff --git a/helix-term/src/ui/menu.rs b/helix-term/src/ui/menu.rs
index 3e63db35..a56cf19b 100644
--- a/helix-term/src/ui/menu.rs
+++ b/helix-term/src/ui/menu.rs
@@ -304,14 +304,6 @@ impl<T: Item + 'static> Component for Menu<T> {
},
);
- // // TODO: set bg for the whole row if selected
- // if line == self.cursor {
- // surface.set_style(
- // Rect::new(area.x, area.y + i as u16, area.width - 1, 1),
- // selected,
- // )
- // }
-
for (i, _) in (scroll..(scroll + win_height).min(len)).enumerate() {
let is_marked = i >= scroll_line && i < scroll_line + scroll_height;
diff --git a/helix-term/src/ui/picker.rs b/helix-term/src/ui/picker.rs
index 2cc25c24..ecf9d528 100644
--- a/helix-term/src/ui/picker.rs
+++ b/helix-term/src/ui/picker.rs
@@ -19,7 +19,7 @@ use helix_core::Position;
use helix_view::{
document::canonicalize_path,
editor::Action,
- graphics::{Color, CursorKind, Rect, Style},
+ graphics::{Color, CursorKind, Margin, Rect, Style},
Document, Editor,
};
@@ -90,23 +90,26 @@ impl<T: 'static> Component for FilePicker<T> {
area.width
};
- let picker_area = Rect::new(area.x, area.y, picker_width, area.height);
+ let picker_area = area.with_width(picker_width);
self.picker.render(picker_area, surface, cx);
if !render_preview {
return;
}
- let preview_area = Rect::new(area.x + picker_width, area.y, area.width / 2, area.height);
+ let preview_area = area.clip_left(picker_width);
// don't like this but the lifetime sucks
let block = Block::default().borders(Borders::ALL);
// calculate the inner area inside the box
- let mut inner = block.inner(preview_area);
+ let inner = block.inner(preview_area);
// 1 column gap on either side
- inner.x += 1;
- inner.width = inner.width.saturating_sub(2);
+ let margin = Margin {
+ vertical: 1,
+ horizontal: 0,
+ };
+ let inner = inner.inner(&margin);
block.render(preview_area, surface);
@@ -282,15 +285,11 @@ impl<T> Picker<T> {
// - score all the names in relation to input
fn inner_rect(area: Rect) -> Rect {
- let padding_vertical = area.height * 10 / 100;
- let padding_horizontal = area.width * 10 / 100;
-
- Rect::new(
- area.x + padding_horizontal,
- area.y + padding_vertical,
- area.width - padding_horizontal * 2,
- area.height - padding_vertical * 2,
- )
+ let margin = Margin {
+ vertical: area.height * 10 / 100,
+ horizontal: area.width * 10 / 100,
+ };
+ area.inner(&margin)
}
impl<T: 'static> Component for Picker<T> {
@@ -410,7 +409,7 @@ impl<T: 'static> Component for Picker<T> {
// -- Render the input bar:
- let area = Rect::new(inner.x + 1, inner.y, inner.width - 1, 1);
+ let area = inner.clip_left(1).with_height(1);
let count = format!("{}/{}", self.matches.len(), self.options.len());
surface.set_stringn(
@@ -434,8 +433,8 @@ impl<T: 'static> Component for Picker<T> {
}
// -- Render the contents:
- // subtract the area of the prompt (-2) and current item marker " > " (-3)
- let inner = Rect::new(inner.x + 3, inner.y + 2, inner.width - 3, inner.height - 2);
+ // subtract area of prompt from top and current item marker " > " from left
+ let inner = inner.clip_top(2).clip_left(3);
let selected = cx.editor.theme.get("ui.text.focus");
@@ -474,7 +473,7 @@ impl<T: 'static> Component for Picker<T> {
let inner = block.inner(area);
// prompt area
- let area = Rect::new(inner.x + 1, inner.y, inner.width - 1, 1);
+ let area = inner.clip_left(1).with_height(1);
self.prompt.cursor(area, editor)
}
diff --git a/helix-view/src/graphics.rs b/helix-view/src/graphics.rs
index 9a7a86c3..66013ee5 100644
--- a/helix-view/src/graphics.rs
+++ b/helix-view/src/graphics.rs
@@ -24,7 +24,7 @@ pub struct Margin {
}
/// A simple rectangle used in the computation of the layout and to give widgets an hint about the
-/// area they are supposed to render to.
+/// area they are supposed to render to. (x, y) = (0, 0) is at the top left corner of the screen.
#[derive(Debug, Clone, Copy, Hash, PartialEq, Eq)]
pub struct Rect {
pub x: u16,
@@ -92,6 +92,57 @@ impl Rect {
self.y.saturating_add(self.height)
}
+ // Returns a new Rect with width reduced from the left side.
+ // This changes the `x` coordinate and clamps it to the right
+ // edge of the original Rect.
+ pub fn clip_left(self, width: u16) -> Rect {
+ let width = std::cmp::min(width, self.width);
+ Rect {
+ x: self.x.saturating_add(width),
+ width: self.width.saturating_sub(width),
+ ..self
+ }
+ }
+
+ // Returns a new Rect with width reduced from the right side.
+ // This does _not_ change the `x` coordinate.
+ pub fn clip_right(self, width: u16) -> Rect {
+ Rect {
+ width: self.width.saturating_sub(width),
+ ..self
+ }
+ }
+
+ // Returns a new Rect with height reduced from the top.
+ // This changes the `y` coordinate and clamps it to the bottom
+ // edge of the original Rect.
+ pub fn clip_top(self, height: u16) -> Rect {
+ let height = std::cmp::min(height, self.height);
+ Rect {
+ y: self.y.saturating_add(height),
+ height: self.height.saturating_sub(height),
+ ..self
+ }
+ }
+
+ // Returns a new Rect with height reduced from the bottom.
+ // This does _not_ change the `y` coordinate.
+ pub fn clip_bottom(self, height: u16) -> Rect {
+ Rect {
+ height: self.height.saturating_sub(height),
+ ..self
+ }
+ }
+
+ pub fn with_height(self, height: u16) -> Rect {
+ // new height may make area > u16::max_value, so use new()
+ Self::new(self.x, self.y, self.width, height)
+ }
+
+ pub fn with_width(self, width: u16) -> Rect {
+ Self::new(self.x, self.y, width, self.height)
+ }
+
pub fn inner(self, margin: &Margin) -> Rect {
if self.width < 2 * margin.horizontal || self.height < 2 * margin.vertical {
Rect::default()
@@ -495,6 +546,40 @@ mod tests {
assert_eq!(rect.height, 100);
}
+ #[test]
+ fn test_rect_chop_from_left() {
+ let rect = Rect::new(0, 0, 20, 30);
+ assert_eq!(Rect::new(10, 0, 10, 30), rect.clip_left(10));
+ assert_eq!(
+ Rect::new(20, 0, 0, 30),
+ rect.clip_left(40),
+ "x should be clamped to original width if new width is bigger"
+ );
+ }
+
+ #[test]
+ fn test_rect_chop_from_right() {
+ let rect = Rect::new(0, 0, 20, 30);
+ assert_eq!(Rect::new(0, 0, 10, 30), rect.clip_right(10));
+ }
+
+ #[test]
+ fn test_rect_chop_from_top() {
+ let rect = Rect::new(0, 0, 20, 30);
+ assert_eq!(Rect::new(0, 10, 20, 20), rect.clip_top(10));
+ assert_eq!(
+ Rect::new(0, 30, 20, 0),
+ rect.clip_top(50),
+ "y should be clamped to original height if new height is bigger"
+ );
+ }
+
+ #[test]
+ fn test_rect_chop_from_bottom() {
+ let rect = Rect::new(0, 0, 20, 30);
+ assert_eq!(Rect::new(0, 0, 20, 20), rect.clip_bottom(10));
+ }
+
fn styles() -> Vec<Style> {
vec![
Style::default(),
diff --git a/helix-view/src/view.rs b/helix-view/src/view.rs
index b707c092..01f18c71 100644
--- a/helix-view/src/view.rs
+++ b/helix-view/src/view.rs
@@ -83,12 +83,7 @@ impl View {
pub fn inner_area(&self) -> Rect {
// TODO: not ideal
const OFFSET: u16 = 7; // 1 diagnostic + 5 linenr + 1 gutter
- Rect::new(
- self.area.x + OFFSET,
- self.area.y,
- self.area.width - OFFSET,
- self.area.height.saturating_sub(1), // -1 for statusline
- )
+ self.area.clip_left(OFFSET).clip_bottom(1) // -1 for statusline
}
pub fn ensure_cursor_in_view(&mut self, doc: &Document, scrolloff: usize) {