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LibWeb: Implement painting for svg text

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The implementation of painting for SVG text follows the same pattern
as the implementation of painting for SVG geometries. However, instead
of reusing the existing PaintableWithLines to draw text, a new class
called SVGTextPaintable is introduced. because everything that is
painted inside an SVG is expected to inherit from SVGGraphicsPaintable.
Therefore reusing the text painting from regular text nodes would
require significant refactoring.
This commit is contained in:
Aliaksandr Kalenik 2023-06-08 21:32:33 +03:00 • committed by Andreas Kling
parent 81a6976e90
commit 0d8d7ae94e
9 changed files with 216 additions and 0 deletions
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56
Userland/Libraries/LibWeb/Painting/SVGTextPaintable.cpp Normal file
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/*
* Copyright (c) 2023, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibWeb/Painting/SVGTextPaintable.h>
#include <LibWeb/SVG/SVGSVGElement.h>
namespace Web::Painting {
JS::NonnullGCPtr<SVGTextPaintable> SVGTextPaintable::create(Layout::SVGTextBox const& layout_box)
{
return layout_box.heap().allocate_without_realm<SVGTextPaintable>(layout_box);
}
SVGTextPaintable::SVGTextPaintable(Layout::SVGTextBox const& layout_box)
: SVGGraphicsPaintable(layout_box)
{
}
Optional<HitTestResult> SVGTextPaintable::hit_test(CSSPixelPoint position, HitTestType type) const
{
(void)position;
(void)type;
return {};
}
void SVGTextPaintable::paint(PaintContext& context, PaintPhase phase) const
{
if (!is_visible())
return;
SVGGraphicsPaintable::paint(context, phase);
if (phase != PaintPhase::Foreground)
return;
auto& painter = context.painter();
Gfx::PainterStateSaver save_painter { painter };
auto& svg_context = context.svg_context();
auto svg_context_offset = context.floored_device_point(svg_context.svg_element_position()).to_type<int>();
painter.translate(svg_context_offset);
auto const& dom_node = layout_box().dom_node();
auto child_text_content = dom_node.child_text_content();
auto transform = layout_box().layout_transform();
auto& scaled_font = layout_node().scaled_font(context);
auto text_offset = context.floored_device_point(dom_node.get_offset().transformed(*transform).to_type<CSSPixels>());
painter.draw_text_run(text_offset.to_type<int>(), Utf8View { child_text_content }, scaled_font, layout_node().computed_values().fill()->as_color());
}
}