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LibWeb: Let Paintable perform the painting
This patch adds a bunch of Paintable subclasses, each corresponding to the Layout::Node subclasses that had a paint() override. All painting logic is moved from layout nodes into their corresponding paintables. Paintables are now created by asking a Layout::Box to produce one: static NonnullOwnPtr<Paintable> Layout::Box::create_paintable() Note that inline nodes still have their painting logic. Since they are not boxes, and all paintables have a corresponding box, we'll need to come up with some other solution for them.
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64 changed files with 1307 additions and 602 deletions
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Userland/Libraries/LibWeb/Painting/ImagePaintable.cpp
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55
Userland/Libraries/LibWeb/Painting/ImagePaintable.cpp
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/*
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* Copyright (c) 2018-2022, 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 <LibGfx/StylePainter.h>
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#include <LibWeb/HTML/HTMLImageElement.h>
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#include <LibWeb/Layout/ImageBox.h>
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#include <LibWeb/Painting/ImagePaintable.h>
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namespace Web::Painting {
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NonnullOwnPtr<ImagePaintable> ImagePaintable::create(Layout::ImageBox const& layout_box)
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{
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return adopt_own(*new ImagePaintable(layout_box));
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}
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ImagePaintable::ImagePaintable(Layout::ImageBox const& layout_box)
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: Paintable(layout_box)
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{
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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&>(m_layout_box);
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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. Also rect() does not include padding etc!
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if (!context.viewport_rect().intersects(enclosing_int_rect(absolute_rect())))
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return;
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Paintable::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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context.painter().set_font(Gfx::FontDatabase::default_font());
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Gfx::StylePainter::paint_frame(context.painter(), enclosing_int_rect(absolute_rect()), context.palette(), Gfx::FrameShape::Container, Gfx::FrameShadow::Sunken, 2);
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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_int_rect(absolute_rect()), alt, Gfx::TextAlignment::Center, computed_values().color(), Gfx::TextElision::Right);
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} else if (auto bitmap = layout_box().image_loader().bitmap(layout_box().image_loader().current_frame_index())) {
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context.painter().draw_scaled_bitmap(rounded_int_rect(absolute_rect()), *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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}
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