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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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12
Userland/Libraries/LibWeb/Layout/LayoutState.h
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@ -11,7 +11,7 @@
#include <LibWeb/Layout/Box.h>
#include <LibWeb/Layout/LineBox.h>
#include <LibWeb/Painting/PaintableBox.h>
#include <LibWeb/Painting/SVGGeometryPaintable.h>
#include <LibWeb/Painting/SVGGraphicsPaintable.h>
namespace Web::Layout {
@ -124,8 +124,11 @@ struct LayoutState {
void set_table_cell_coordinates(Painting::PaintableBox::TableCellCoordinates const& table_cell_coordinates) { m_table_cell_coordinates = table_cell_coordinates; }
auto const& table_cell_coordinates() const { return m_table_cell_coordinates; }
void set_svg_path_data(Painting::SVGGeometryPaintable::PathData const& svg_path_data) { m_svg_path_data = svg_path_data; }
auto& svg_path_data() const { return m_svg_path_data; }
void set_computed_svg_path(Gfx::Path const& svg_path) { m_computed_svg_path = svg_path; }
auto& computed_svg_path() { return m_computed_svg_path; }
void set_computed_svg_transforms(Painting::SVGGraphicsPaintable::ComputedTransforms const& computed_transforms) { m_computed_svg_transforms = computed_transforms; }
auto const& computed_svg_transforms() const { return m_computed_svg_transforms; }
private:
AvailableSize available_width_inside() const;
@ -151,7 +154,8 @@ struct LayoutState {
Optional<Painting::PaintableBox::BordersDataWithElementKind> m_override_borders_data;
Optional<Painting::PaintableBox::TableCellCoordinates> m_table_cell_coordinates;
Optional<Painting::SVGGeometryPaintable::PathData> m_svg_path_data;
Optional<Gfx::Path> m_computed_svg_path;
Optional<Painting::SVGGraphicsPaintable::ComputedTransforms> m_computed_svg_transforms;
};
// Commits the used values produced by layout and builds a paintable tree.