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LibWeb: Layout SVG <text> elements during layout (not while painting)

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Previously, all SVG <text> elements were zero-sized boxes, that were
only actually positioned and sized during painting. This led to a number
of problems, the most visible of which being that text could not be
scaled based on the viewBox.

Which this patch, <text> elements get a correctly sized layout box,
that can be hit-tested and respects the SVG viewBox.

To share code with SVGGeometryElement's the PathData (from the prior
commit) has been split into a computed path and computed transforms.
The computed path is specific to geometry elements, but the computed
transforms are shared between all SVG graphics elements.
This commit is contained in:
MacDue 2023-10-29 19:11:46 +00:00 • committed by Alexander Kalenik
parent dc9cb449b1
commit c93d367d95
16 changed files with 209 additions and 173 deletions
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10
Userland/Libraries/LibWeb/Layout/LayoutState.cpp
View file

@ -10,6 +10,7 @@
#include <LibWeb/Layout/LayoutState.h>
#include <LibWeb/Layout/TextNode.h>
#include <LibWeb/Layout/Viewport.h>
#include <LibWeb/Painting/SVGGeometryPaintable.h>
namespace Web::Layout {
@ -266,9 +267,14 @@ void LayoutState::commit(Box& root)
paintables_with_lines.append(paintable_with_lines);
}
if (used_values.svg_path_data().has_value() && is<Painting::SVGGeometryPaintable>(paintable_box)) {
if (used_values.computed_svg_transforms().has_value() && is<Painting::SVGGraphicsPaintable>(paintable_box)) {
auto& svg_graphics_paintable = static_cast<Painting::SVGGraphicsPaintable&>(paintable_box);
svg_graphics_paintable.set_computed_transforms(*used_values.computed_svg_transforms());
}
if (used_values.computed_svg_path().has_value() && is<Painting::SVGGeometryPaintable>(paintable_box)) {
auto& svg_geometry_paintable = static_cast<Painting::SVGGeometryPaintable&>(paintable_box);
svg_geometry_paintable.set_path_data(move(*used_values.svg_path_data()));
svg_geometry_paintable.set_computed_path(move(*used_values.computed_svg_path()));
}
}
}