c648e24cff
We achieve this by adding a new Layout::ImageProvider class and having both HTMLImageElement and HTMLObjectElement inherit from it. The HTML spec is vague on how object image loading should work, which is why this first pass is focusing on image elements.
77 lines
2.9 KiB
C++
77 lines
2.9 KiB
C++
/*
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* Copyright (c) 2018-2023, 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 <LibGfx/StylePainter.h>
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#include <LibWeb/HTML/DecodedImageData.h>
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#include <LibWeb/HTML/HTMLImageElement.h>
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#include <LibWeb/HTML/ImageRequest.h>
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#include <LibWeb/Layout/ImageBox.h>
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#include <LibWeb/Painting/BorderRadiusCornerClipper.h>
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#include <LibWeb/Painting/ImagePaintable.h>
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#include <LibWeb/Platform/FontPlugin.h>
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namespace Web::Painting {
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JS::NonnullGCPtr<ImagePaintable> ImagePaintable::create(Layout::ImageBox const& layout_box)
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{
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return layout_box.heap().allocate_without_realm<ImagePaintable>(layout_box);
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}
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ImagePaintable::ImagePaintable(Layout::ImageBox const& layout_box)
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: PaintableBox(layout_box)
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{
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browsing_context().register_viewport_client(*this);
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}
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void ImagePaintable::finalize()
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{
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Base::finalize();
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// NOTE: We unregister from the browsing context in finalize() to avoid trouble
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// in the scenario where our BrowsingContext has already been swept by GC.
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browsing_context().unregister_viewport_client(*this);
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}
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Layout::ImageBox const& ImagePaintable::layout_box() const
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{
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return static_cast<Layout::ImageBox const&>(layout_node());
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}
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void ImagePaintable::paint(PaintContext& context, PaintPhase phase) const
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{
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if (!is_visible())
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return;
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// FIXME: This should be done at a different level.
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if (is_out_of_view(context))
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return;
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PaintableBox::paint(context, phase);
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if (phase == PaintPhase::Foreground) {
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if (layout_box().renders_as_alt_text()) {
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auto& image_element = verify_cast<HTML::HTMLImageElement>(*dom_node());
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auto enclosing_rect = context.enclosing_device_rect(absolute_rect()).to_type<int>();
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context.painter().set_font(Platform::FontPlugin::the().default_font());
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Gfx::StylePainter::paint_frame(context.painter(), enclosing_rect, context.palette(), Gfx::FrameStyle::SunkenContainer);
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auto alt = image_element.alt();
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if (alt.is_empty())
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alt = image_element.src();
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context.painter().draw_text(enclosing_rect, alt, Gfx::TextAlignment::Center, computed_values().color(), Gfx::TextElision::Right);
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} else if (auto bitmap = layout_box().image_provider().current_image_bitmap()) {
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auto image_rect = context.rounded_device_rect(absolute_rect());
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ScopedCornerRadiusClip corner_clip { context, context.painter(), image_rect, normalized_border_radii_data(ShrinkRadiiForBorders::Yes) };
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context.painter().draw_scaled_bitmap(image_rect.to_type<int>(), *bitmap, bitmap->rect(), 1.0f, to_gfx_scaling_mode(computed_values().image_rendering()));
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}
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}
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}
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void ImagePaintable::browsing_context_did_set_viewport_rect(CSSPixelRect const& viewport_rect)
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{
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const_cast<Layout::ImageProvider&>(layout_box().image_provider()).set_visible_in_viewport(viewport_rect.intersects(absolute_rect()));
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}
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}
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