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LibWeb: Rename LayoutNode classes and move them into Layout namespace

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Bring the names of various boxes closer to spec language. This should
hopefully make things easier to understand and hack on. :^)

Some notable changes:

- LayoutNode -> Layout::Node
- LayoutBox -> Layout::Box
- LayoutBlock -> Layout::BlockBox
- LayoutReplaced -> Layout::ReplacedBox
- LayoutDocument -> Layout::InitialContainingBlockBox
- LayoutText -> Layout::TextNode
- LayoutInline -> Layout::InlineNode

Note that this is not strictly a "box tree" as we also hang inline/text
nodes in the same tree, and they don't generate boxes. (Instead, they
contribute line box fragments to their containing block!)
This commit is contained in:
Andreas Kling 2020-11-22 15:53:01 +01:00
parent f358f2255f
commit 5aeab9878e
114 changed files with 863 additions and 880 deletions
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143
Libraries/LibWeb/Layout/BlockBox.cpp Normal file
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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <LibGUI/Painter.h>
#include <LibWeb/CSS/StyleResolver.h>
#include <LibWeb/DOM/Element.h>
#include <LibWeb/Dump.h>
#include <LibWeb/Layout/BlockBox.h>
#include <LibWeb/Layout/InitialContainingBlockBox.h>
#include <LibWeb/Layout/InlineNode.h>
#include <LibWeb/Layout/ReplacedBox.h>
#include <LibWeb/Layout/TextNode.h>
#include <LibWeb/Layout/WidgetBox.h>
#include <math.h>
namespace Web::Layout {
BlockBox::BlockBox(DOM::Document& document, DOM::Node* node, NonnullRefPtr<CSS::StyleProperties> style)
: Box(document, node, move(style))
{
}
BlockBox::~BlockBox()
{
}
Node& BlockBox::inline_wrapper()
{
if (!last_child() || !last_child()->is_block() || last_child()->dom_node() != nullptr) {
append_child(adopt(*new BlockBox(document(), nullptr, style_for_anonymous_block())));
last_child()->set_children_are_inline(true);
}
return *last_child();
}
void BlockBox::paint(PaintContext& context, PaintPhase phase)
{
if (!is_visible())
return;
Box::paint(context, phase);
// FIXME: Inline backgrounds etc.
if (phase == PaintPhase::Foreground) {
if (children_are_inline()) {
for (auto& line_box : m_line_boxes) {
for (auto& fragment : line_box.fragments()) {
if (context.should_show_line_box_borders())
context.painter().draw_rect(enclosing_int_rect(fragment.absolute_rect()), Color::Green);
fragment.paint(context);
}
}
}
}
if (phase == PaintPhase::FocusOutline) {
if (children_are_inline()) {
for (auto& line_box : m_line_boxes) {
for (auto& fragment : line_box.fragments()) {
auto* node = fragment.layout_node().dom_node();
if (!node)
continue;
auto* parent = node->parent_element();
if (!parent)
continue;
if (parent->is_focused())
context.painter().draw_rect(enclosing_int_rect(fragment.absolute_rect()), context.palette().focus_outline());
}
}
}
}
}
HitTestResult BlockBox::hit_test(const Gfx::IntPoint& position, HitTestType type) const
{
if (!children_are_inline())
return Box::hit_test(position, type);
HitTestResult last_good_candidate;
for (auto& line_box : m_line_boxes) {
for (auto& fragment : line_box.fragments()) {
if (is<Box>(fragment.layout_node()) && downcast<Box>(fragment.layout_node()).stacking_context())
continue;
if (enclosing_int_rect(fragment.absolute_rect()).contains(position)) {
if (fragment.layout_node().is_block())
return downcast<BlockBox>(fragment.layout_node()).hit_test(position, type);
return { fragment.layout_node(), fragment.text_index_at(position.x()) };
}
if (fragment.absolute_rect().top() <= position.y())
last_good_candidate = { fragment.layout_node(), fragment.text_index_at(position.x()) };
}
}
if (type == HitTestType::TextCursor && last_good_candidate.layout_node)
return last_good_candidate;
return { absolute_rect().contains(position.x(), position.y()) ? this : nullptr };
}
NonnullRefPtr<CSS::StyleProperties> BlockBox::style_for_anonymous_block() const
{
auto new_style = CSS::StyleProperties::create();
specified_style().for_each_property([&](auto property_id, auto& value) {
if (CSS::StyleResolver::is_inherited_property(property_id))
new_style->set_property(property_id, value);
});
return new_style;
}
void BlockBox::split_into_lines(BlockBox& container, LayoutMode layout_mode)
{
auto* line_box = &container.ensure_last_line_box();
if (layout_mode != LayoutMode::OnlyRequiredLineBreaks && line_box->width() > 0 && line_box->width() + width() > container.width()) {
line_box = &container.add_line_box();
}
line_box->add_fragment(*this, 0, 0, width(), height());
}
}