ddbfd77e2c
Inline layout nodes cannot have block children (except inline-block, of course.) When encountering a block box child of an inline, we now hoist the block up to the inline's containing block, and also wrap any preceding inline siblings in an anonymous wrapper block. This improves the ACID2 situation quite a bit (although we still need floats to really bring it home.) I also took this opportunity to move all tree building logic into Layout::TreeBuilder, to continue the theme of absolving our LayoutNode objects of responsibilities. :^)
267 lines
9.4 KiB
C++
267 lines
9.4 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <LibGUI/Painter.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Element.h>
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#include <LibWeb/Dump.h>
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#include <LibWeb/Layout/BlockBox.h>
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#include <LibWeb/Layout/InitialContainingBlockBox.h>
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#include <LibWeb/Layout/Node.h>
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#include <LibWeb/Layout/ReplacedBox.h>
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#include <LibWeb/Page/Frame.h>
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namespace Web::Layout {
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Node::Node(DOM::Document& document, DOM::Node* node)
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: m_document(document)
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, m_dom_node(node)
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{
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if (m_dom_node)
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m_dom_node->set_layout_node({}, this);
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}
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Node::~Node()
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{
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if (m_dom_node && m_dom_node->layout_node() == this)
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m_dom_node->set_layout_node({}, nullptr);
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}
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bool Node::can_contain_boxes_with_position_absolute() const
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{
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return style().position() != CSS::Position::Static || is_root();
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}
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const BlockBox* Node::containing_block() const
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{
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auto nearest_block_ancestor = [this] {
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auto* ancestor = parent();
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while (ancestor && !is<BlockBox>(*ancestor))
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ancestor = ancestor->parent();
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return downcast<BlockBox>(ancestor);
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};
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if (is_text())
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return nearest_block_ancestor();
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auto position = style().position();
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if (position == CSS::Position::Absolute) {
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auto* ancestor = parent();
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while (ancestor && !ancestor->can_contain_boxes_with_position_absolute())
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ancestor = ancestor->parent();
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while (ancestor && (!is<BlockBox>(ancestor) || ancestor->is_anonymous()))
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ancestor = ancestor->containing_block();
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return downcast<BlockBox>(ancestor);
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}
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if (position == CSS::Position::Fixed)
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return &root();
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return nearest_block_ancestor();
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}
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void Node::paint(PaintContext& context, PaintPhase phase)
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{
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if (!is_visible())
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return;
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before_children_paint(context, phase);
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for_each_child([&](auto& child) {
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if (child.is_box() && downcast<Box>(child).stacking_context())
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return;
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child.paint(context, phase);
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});
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after_children_paint(context, phase);
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}
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HitTestResult Node::hit_test(const Gfx::IntPoint& position, HitTestType type) const
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{
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HitTestResult result;
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for_each_child([&](auto& child) {
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// Skip over children that establish their own stacking context.
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// The outer loop who called us will take care of those.
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if (is<Box>(child) && downcast<Box>(child).stacking_context())
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return;
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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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const Frame& Node::frame() const
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{
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ASSERT(document().frame());
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return *document().frame();
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}
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Frame& Node::frame()
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{
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ASSERT(document().frame());
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return *document().frame();
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}
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const InitialContainingBlockBox& Node::root() const
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{
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ASSERT(document().layout_node());
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return *document().layout_node();
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}
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InitialContainingBlockBox& Node::root()
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{
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ASSERT(document().layout_node());
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return *document().layout_node();
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}
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void Node::split_into_lines(BlockBox& container, LayoutMode layout_mode)
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{
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for_each_child([&](auto& child) {
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child.split_into_lines(container, layout_mode);
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});
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}
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void Node::set_needs_display()
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{
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if (auto* block = containing_block()) {
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block->for_each_fragment([&](auto& fragment) {
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if (&fragment.layout_node() == this || is_ancestor_of(fragment.layout_node())) {
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frame().set_needs_display(enclosing_int_rect(fragment.absolute_rect()));
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}
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return IterationDecision::Continue;
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});
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}
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}
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float Node::font_size() const
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{
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// FIXME: This doesn't work right for relative font-sizes
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auto length = specified_style().length_or_fallback(CSS::PropertyID::FontSize, CSS::Length(10, CSS::Length::Type::Px));
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return length.raw_value();
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}
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Gfx::FloatPoint Node::box_type_agnostic_position() const
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{
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if (is_box())
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return downcast<Box>(*this).absolute_position();
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ASSERT(is_inline());
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Gfx::FloatPoint position;
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if (auto* block = containing_block()) {
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block->for_each_fragment([&](auto& fragment) {
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if (&fragment.layout_node() == this || is_ancestor_of(fragment.layout_node())) {
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position = fragment.absolute_rect().location();
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return IterationDecision::Break;
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}
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return IterationDecision::Continue;
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});
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}
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return position;
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}
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bool Node::is_floating() const
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{
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if (!has_style())
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return false;
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return style().float_() != CSS::Float::None;
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}
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bool Node::is_absolutely_positioned() const
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{
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if (!has_style())
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return false;
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auto position = style().position();
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return position == CSS::Position::Absolute || position == CSS::Position::Fixed;
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}
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bool Node::is_fixed_position() const
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{
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if (!has_style())
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return false;
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auto position = style().position();
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return position == CSS::Position::Fixed;
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}
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NodeWithStyle::NodeWithStyle(DOM::Document& document, DOM::Node* node, NonnullRefPtr<CSS::StyleProperties> specified_style)
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: Node(document, node)
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, m_specified_style(move(specified_style))
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{
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m_has_style = true;
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apply_style(*m_specified_style);
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}
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void NodeWithStyle::apply_style(const CSS::StyleProperties& specified_style)
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{
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auto& style = static_cast<MutableLayoutStyle&>(m_style);
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style.set_position(specified_style.position());
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style.set_text_align(specified_style.text_align());
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auto white_space = specified_style.white_space();
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if (white_space.has_value())
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style.set_white_space(white_space.value());
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auto float_ = specified_style.float_();
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if (float_.has_value())
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style.set_float(float_.value());
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style.set_z_index(specified_style.z_index());
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style.set_width(specified_style.length_or_fallback(CSS::PropertyID::Width, {}));
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style.set_min_width(specified_style.length_or_fallback(CSS::PropertyID::MinWidth, {}));
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style.set_max_width(specified_style.length_or_fallback(CSS::PropertyID::MaxWidth, {}));
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style.set_height(specified_style.length_or_fallback(CSS::PropertyID::Height, {}));
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style.set_min_height(specified_style.length_or_fallback(CSS::PropertyID::MinHeight, {}));
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style.set_max_height(specified_style.length_or_fallback(CSS::PropertyID::MaxHeight, {}));
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style.set_offset(specified_style.length_box(CSS::PropertyID::Left, CSS::PropertyID::Top, CSS::PropertyID::Right, CSS::PropertyID::Bottom));
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style.set_margin(specified_style.length_box(CSS::PropertyID::MarginLeft, CSS::PropertyID::MarginTop, CSS::PropertyID::MarginRight, CSS::PropertyID::MarginBottom));
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style.set_padding(specified_style.length_box(CSS::PropertyID::PaddingLeft, CSS::PropertyID::PaddingTop, CSS::PropertyID::PaddingRight, CSS::PropertyID::PaddingBottom));
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style.border_left().width = specified_style.length_or_fallback(CSS::PropertyID::BorderLeftWidth, {}).resolved_or_zero(*this, 0).to_px(*this);
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style.border_top().width = specified_style.length_or_fallback(CSS::PropertyID::BorderTopWidth, {}).resolved_or_zero(*this, 0).to_px(*this);
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style.border_right().width = specified_style.length_or_fallback(CSS::PropertyID::BorderRightWidth, {}).resolved_or_zero(*this, 0).to_px(*this);
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style.border_bottom().width = specified_style.length_or_fallback(CSS::PropertyID::BorderBottomWidth, {}).resolved_or_zero(*this, 0).to_px(*this);
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style.border_left().color = specified_style.color_or_fallback(CSS::PropertyID::BorderLeftColor, document(), Color::Transparent);
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style.border_top().color = specified_style.color_or_fallback(CSS::PropertyID::BorderTopColor, document(), Color::Transparent);
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style.border_right().color = specified_style.color_or_fallback(CSS::PropertyID::BorderRightColor, document(), Color::Transparent);
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style.border_bottom().color = specified_style.color_or_fallback(CSS::PropertyID::BorderBottomColor, document(), Color::Transparent);
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}
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void Node::handle_mousedown(Badge<EventHandler>, const Gfx::IntPoint&, unsigned, unsigned)
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{
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}
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void Node::handle_mouseup(Badge<EventHandler>, const Gfx::IntPoint&, unsigned, unsigned)
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{
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}
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void Node::handle_mousemove(Badge<EventHandler>, const Gfx::IntPoint&, unsigned, unsigned)
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{
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}
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}
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