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LibWeb: Implement the CSS outline property :^)

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...along with `outline-color`, `outline-style`, and `outline-width`.

This re-uses the existing border-painting code, which seems to work well
enough!

This replaces the previous code for drawing focus-outlines, with generic
outline painting for any elements that want it. Focus outlines are now
instead supported by this code in Default.css:

```css
:focus-visible {
    outline: auto;
}
```
This commit is contained in:
Sam Atkins 2023-08-02 17:24:14 +01:00 • committed by Andreas Kling
parent 5640779838
commit fe7e797483
15 changed files with 174 additions and 40 deletions
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9
Userland/Libraries/LibWeb/Painting/BorderPainting.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021-2023, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -55,6 +56,11 @@ struct BorderRadiiData {
bottom_right.shrink(right, bottom);
bottom_left.shrink(left, bottom);
}
inline void inflate(CSSPixels top, CSSPixels right, CSSPixels bottom, CSSPixels left)
{
shrink(-top, -right, -bottom, -left);
}
};
BorderRadiiData normalized_border_radii_data(Layout::Node const&, CSSPixelRect const&, CSS::BorderRadiusData top_left_radius, CSS::BorderRadiusData top_right_radius, CSS::BorderRadiusData bottom_right_radius, CSS::BorderRadiusData bottom_left_radius);
@ -72,6 +78,9 @@ struct BordersData {
CSS::BorderData left;
};
// Returns OptionalNone if there is no outline to paint.
Optional<BordersData> borders_data_for_outline(Layout::Node const&, Color outline_color, CSS::OutlineStyle outline_style, CSSPixels outline_width);
RefPtr<Gfx::Bitmap> get_cached_corner_bitmap(DevicePixelSize corners_size);
void paint_border(PaintContext& context, BorderEdge edge, DevicePixelRect const& rect, Gfx::AntiAliasingPainter::CornerRadius const& radius, Gfx::AntiAliasingPainter::CornerRadius const& opposite_radius, BordersData const& borders_data, Gfx::Path& path, bool last);