02b316fd5c
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.
99 lines
2.8 KiB
C++
99 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Sam Atkins <atkinssj@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/Painter.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/HTML/BrowsingContext.h>
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#include <LibWeb/HTML/HTMLBodyElement.h>
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#include <LibWeb/HTML/HTMLHtmlElement.h>
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#include <LibWeb/Layout/BlockContainer.h>
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#include <LibWeb/Layout/Box.h>
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#include <LibWeb/Layout/FormattingContext.h>
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#include <LibWeb/Painting/BackgroundPainting.h>
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#include <LibWeb/Painting/BorderPainting.h>
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#include <LibWeb/Painting/Paintable.h>
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#include <LibWeb/Painting/ShadowPainting.h>
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namespace Web::Layout {
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Box::Box(DOM::Document& document, DOM::Node* node, NonnullRefPtr<CSS::StyleProperties> style)
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: NodeWithStyleAndBoxModelMetrics(document, node, move(style))
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{
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}
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Box::Box(DOM::Document& document, DOM::Node* node, CSS::ComputedValues computed_values)
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: NodeWithStyleAndBoxModelMetrics(document, node, move(computed_values))
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{
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}
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Box::~Box()
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{
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}
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void Box::set_paint_box(OwnPtr<Painting::Paintable> paint_box)
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{
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m_paint_box = move(paint_box);
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}
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// https://www.w3.org/TR/css-display-3/#out-of-flow
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bool Box::is_out_of_flow(FormattingContext const& formatting_context) const
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{
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// A box is out of flow if either:
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// 1. It is floated (which requires that floating is not inhibited).
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if (!formatting_context.inhibits_floating() && computed_values().float_() != CSS::Float::None)
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return true;
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// 2. It is "absolutely positioned".
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switch (computed_values().position()) {
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case CSS::Position::Absolute:
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case CSS::Position::Fixed:
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return true;
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case CSS::Position::Static:
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case CSS::Position::Relative:
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case CSS::Position::Sticky:
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break;
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}
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return false;
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}
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HitTestResult Box::hit_test(const Gfx::IntPoint& position, HitTestType type) const
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{
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// FIXME: It would be nice if we could confidently skip over hit testing
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// parts of the layout tree, but currently we can't just check
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// m_rect.contains() since inline text rects can't be trusted..
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HitTestResult result { m_paint_box->absolute_border_box_rect().contains(position.x(), position.y()) ? this : nullptr };
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for_each_child_in_paint_order([&](auto& child) {
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auto child_result = child.hit_test(position, type);
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if (child_result.layout_node)
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result = child_result;
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});
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return result;
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}
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void Box::set_needs_display()
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{
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if (!is_inline()) {
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browsing_context().set_needs_display(enclosing_int_rect(m_paint_box->absolute_rect()));
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return;
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}
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Node::set_needs_display();
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}
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bool Box::is_body() const
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{
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return dom_node() && dom_node() == document().body();
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}
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OwnPtr<Painting::Paintable> Box::create_paintable() const
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{
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return Painting::Paintable::create(*this);
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}
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}
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