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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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/*
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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 <AK/Debug.h>
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#include <LibWeb/HTML/BrowsingContextContainer.h>
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#include <LibWeb/Layout/FrameBox.h>
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#include <LibWeb/Layout/InitialContainingBlock.h>
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#include <LibWeb/Painting/NestedBrowsingContextPaintable.h>
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namespace Web::Painting {
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NonnullOwnPtr<NestedBrowsingContextPaintable> NestedBrowsingContextPaintable::create(Layout::FrameBox const& layout_box)
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{
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return adopt_own(*new NestedBrowsingContextPaintable(layout_box));
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}
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NestedBrowsingContextPaintable::NestedBrowsingContextPaintable(Layout::FrameBox const& layout_box)
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: Paintable(layout_box)
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{
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}
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Layout::FrameBox const& NestedBrowsingContextPaintable::layout_box() const
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{
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return static_cast<Layout::FrameBox const&>(m_layout_box);
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}
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void NestedBrowsingContextPaintable::paint(PaintContext& context, PaintPhase phase) const
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{
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Paintable::paint(context, phase);
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if (phase == PaintPhase::Foreground) {
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auto* hosted_document = layout_box().dom_node().content_document_without_origin_check();
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if (!hosted_document)
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return;
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auto* hosted_layout_tree = hosted_document->layout_node();
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if (!hosted_layout_tree)
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return;
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context.painter().save();
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auto old_viewport_rect = context.viewport_rect();
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context.painter().add_clip_rect(enclosing_int_rect(absolute_rect()));
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context.painter().translate(absolute_x(), absolute_y());
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context.set_viewport_rect({ {}, layout_box().dom_node().nested_browsing_context()->size() });
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const_cast<Layout::InitialContainingBlock*>(hosted_layout_tree)->paint_all_phases(context);
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context.set_viewport_rect(old_viewport_rect);
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context.painter().restore();
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if constexpr (HIGHLIGHT_FOCUSED_FRAME_DEBUG) {
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if (layout_box().dom_node().nested_browsing_context()->is_focused_context()) {
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context.painter().draw_rect(absolute_rect().to_type<int>(), Color::Cyan);
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}
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}
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}
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}
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}
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