mirror of
https://github.com/RGBCube/serenity
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17a6fcfde3
If the `width` and `height` attributes are provided, we derive the intrinsic size and ratio from them. Otherwise, we trace a rectangle around the geometry elements inside the SVG and use the size of that as the intrinsic size. This is definitely far from correct, but is still a much better guess at the intrinsic size than nothing.
93 lines
3.4 KiB
C++
93 lines
3.4 KiB
C++
/*
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* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
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* Copyright (c) 2022, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibWeb/HTML/Parser/HTMLParser.h>
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#include <LibWeb/Layout/ReplacedBox.h>
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#include <LibWeb/Layout/SVGGeometryBox.h>
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#include <LibWeb/Painting/SVGSVGPaintable.h>
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namespace Web::Layout {
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SVGSVGBox::SVGSVGBox(DOM::Document& document, SVG::SVGSVGElement& element, NonnullRefPtr<CSS::StyleProperties> properties)
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: ReplacedBox(document, element, move(properties))
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{
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}
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RefPtr<Painting::Paintable> SVGSVGBox::create_paintable() const
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{
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return Painting::SVGSVGPaintable::create(*this);
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}
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void SVGSVGBox::prepare_for_replaced_layout()
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{
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if (dom_node().has_attribute(HTML::AttributeNames::width) && dom_node().has_attribute(HTML::AttributeNames::height)) {
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Optional<float> w;
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Optional<float> h;
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if (auto width = HTML::parse_dimension_value(dom_node().attribute(HTML::AttributeNames::width))) {
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if (width->has_length())
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w = width->to_length().to_px(*this);
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}
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if (auto height = HTML::parse_dimension_value(dom_node().attribute(HTML::AttributeNames::height))) {
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if (height->has_length())
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h = height->to_length().to_px(*this);
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}
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if (w.has_value() && h.has_value()) {
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set_intrinsic_width(*w);
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set_intrinsic_height(*h);
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set_intrinsic_aspect_ratio(*w / *h);
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return;
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}
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}
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Optional<Gfx::FloatRect> united_rect;
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auto add_to_united_rect = [&](Gfx::FloatRect const& rect) {
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if (united_rect.has_value())
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united_rect = united_rect->united(rect);
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else
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united_rect = rect;
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};
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for_each_in_subtree_of_type<SVGGeometryBox>([&](SVGGeometryBox const& geometry_box) {
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auto& dom_node = const_cast<SVG::SVGGeometryElement&>(geometry_box.dom_node());
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if (dom_node.has_attribute(HTML::AttributeNames::width) && dom_node.has_attribute(HTML::AttributeNames::height)) {
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Gfx::FloatRect rect;
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// FIXME: Allow for relative lengths here
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rect.set_width(computed_values().width().resolved(*this, CSS::Length::make_px(0)).to_px(*this));
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rect.set_height(computed_values().height().resolved(*this, CSS::Length::make_px(0)).to_px(*this));
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add_to_united_rect(rect);
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return IterationDecision::Continue;
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}
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auto& path = dom_node.get_path();
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auto path_bounding_box = path.bounding_box();
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// Stroke increases the path's size by stroke_width/2 per side.
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auto stroke_width = geometry_box.dom_node().stroke_width().value_or(0);
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path_bounding_box.inflate(stroke_width, stroke_width);
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auto& maybe_view_box = this->dom_node().view_box();
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if (maybe_view_box.has_value()) {
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auto view_box = maybe_view_box.value();
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Gfx::FloatRect rect(view_box.min_x, view_box.min_y, view_box.width, view_box.height);
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add_to_united_rect(rect);
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return IterationDecision::Continue;
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}
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add_to_united_rect(path_bounding_box);
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return IterationDecision::Continue;
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});
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if (united_rect.has_value()) {
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set_intrinsic_width(united_rect->width());
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set_intrinsic_height(united_rect->height());
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set_intrinsic_aspect_ratio(united_rect->width() / united_rect->height());
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}
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}
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}
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