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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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35
Userland/Libraries/LibWeb/Painting/PaintableBox.cpp
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@ -170,6 +170,16 @@ void PaintableBox::paint(PaintContext& context, PaintPhase phase) const
paint_border(context);
}
if (phase == PaintPhase::Outline) {
auto outline_width = computed_values().outline_width().to_px(layout_node());
auto borders_data = borders_data_for_outline(layout_node(), computed_values().outline_color(), computed_values().outline_style(), outline_width);
if (borders_data.has_value()) {
auto border_radius_data = normalized_border_radii_data(ShrinkRadiiForBorders::No);
border_radius_data.inflate(outline_width, outline_width, outline_width, outline_width);
paint_all_borders(context, absolute_border_box_rect().inflated(outline_width, outline_width, outline_width, outline_width), border_radius_data, borders_data.value());
}
}
if (phase == PaintPhase::Overlay && should_clip_rect)
context.painter().restore();
@ -216,12 +226,6 @@ void PaintableBox::paint(PaintContext& context, PaintPhase phase) const
context.painter().draw_rect(size_text_device_rect, context.palette().threed_shadow1());
context.painter().draw_text(size_text_device_rect, size_text, font, Gfx::TextAlignment::Center, context.palette().color(Gfx::ColorRole::TooltipText));
}
if (phase == PaintPhase::Outline && layout_box().dom_node() && layout_box().dom_node()->is_element() && verify_cast<DOM::Element>(*layout_box().dom_node()).is_focused()) {
// FIXME: Implement this as `outline` using :focus-visible in the default UA stylesheet to make it possible to override/disable.
auto focus_outline_rect = context.enclosing_device_rect(absolute_border_box_rect()).inflated(4, 4);
context.painter().draw_focus_rect(focus_outline_rect.to_type<int>(), context.palette().focus_outline());
}
}
BordersData PaintableBox::remove_element_kind_from_borders_data(PaintableBox::BordersDataWithElementKind borders_data)
@ -639,25 +643,6 @@ void PaintableWithLines::paint(PaintContext& context, PaintPhase phase) const
if (corner_clipper.has_value())
corner_clipper->blit_corner_clipping(context.painter());
}
// FIXME: Merge this loop with the above somehow..
if (phase == PaintPhase::Outline) {
for (auto& line_box : m_line_boxes) {
for (auto& fragment : line_box.fragments()) {
auto* node = fragment.layout_node().dom_node();
if (!node)
continue;
auto* parent = node->parent_element();
if (!parent)
continue;
if (parent->is_focused()) {
// FIXME: Implement this as `outline` using :focus-visible in the default UA stylesheet to make it possible to override/disable.
auto focus_outline_rect = context.enclosing_device_rect(fragment.absolute_rect()).to_type<int>().inflated(4, 4);
context.painter().draw_focus_rect(focus_outline_rect, context.palette().focus_outline());
}
}
}
}
}
bool PaintableWithLines::handle_mousewheel(Badge<EventHandler>, CSSPixelPoint, unsigned, unsigned, int wheel_delta_x, int wheel_delta_y)