c9700e100e
This patch adds a map of Layout::Node to FormattingState::NodeState. Instead of updating layout nodes incrementally as layout progresses through the formatting contexts, all updates are now written to the corresponding NodeState instead. At the end of layout, FormattingState::commit() is called, which transfers all the values from the NodeState objects to the Node. This will soon allow us to perform completely non-destructive layouts which don't affect the tree. Note that there are many imperfections here, and still many places where we assign to the NodeState, but later read directly from the Node instead. I'm just committing at this stage to make subsequent diffs easier to understand.
133 lines
4.4 KiB
C++
133 lines
4.4 KiB
C++
/*
|
|
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibGfx/Painter.h>
|
|
#include <LibWeb/Dump.h>
|
|
#include <LibWeb/Layout/BlockContainer.h>
|
|
#include <LibWeb/Layout/InitialContainingBlock.h>
|
|
#include <LibWeb/Layout/InlineFormattingContext.h>
|
|
#include <LibWeb/Layout/ReplacedBox.h>
|
|
#include <LibWeb/Layout/TextNode.h>
|
|
|
|
namespace Web::Layout {
|
|
|
|
BlockContainer::BlockContainer(DOM::Document& document, DOM::Node* node, NonnullRefPtr<CSS::StyleProperties> style)
|
|
: Box(document, node, move(style))
|
|
{
|
|
}
|
|
|
|
BlockContainer::BlockContainer(DOM::Document& document, DOM::Node* node, CSS::ComputedValues computed_values)
|
|
: Box(document, node, move(computed_values))
|
|
{
|
|
}
|
|
|
|
BlockContainer::~BlockContainer()
|
|
{
|
|
}
|
|
|
|
bool BlockContainer::should_clip_overflow() const
|
|
{
|
|
return computed_values().overflow_x() != CSS::Overflow::Visible && computed_values().overflow_y() != CSS::Overflow::Visible;
|
|
}
|
|
|
|
void BlockContainer::paint(PaintContext& context, PaintPhase phase)
|
|
{
|
|
if (!is_visible())
|
|
return;
|
|
|
|
Box::paint(context, phase);
|
|
|
|
if (!children_are_inline())
|
|
return;
|
|
|
|
if (should_clip_overflow()) {
|
|
context.painter().save();
|
|
// FIXME: Handle overflow-x and overflow-y being different values.
|
|
context.painter().add_clip_rect(enclosing_int_rect(absolute_padding_box_rect()));
|
|
context.painter().translate(-m_scroll_offset.to_type<int>());
|
|
}
|
|
|
|
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, phase);
|
|
}
|
|
}
|
|
|
|
if (should_clip_overflow()) {
|
|
context.painter().restore();
|
|
}
|
|
|
|
// FIXME: Merge this loop with the above somehow..
|
|
if (phase == PaintPhase::FocusOutline) {
|
|
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 BlockContainer::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()) && verify_cast<Box>(fragment.layout_node()).stacking_context())
|
|
continue;
|
|
if (enclosing_int_rect(fragment.absolute_rect()).contains(position)) {
|
|
if (is<BlockContainer>(fragment.layout_node()))
|
|
return verify_cast<BlockContainer>(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 };
|
|
}
|
|
|
|
bool BlockContainer::is_scrollable() const
|
|
{
|
|
// FIXME: Support horizontal scroll as well (overflow-x)
|
|
return computed_values().overflow_y() == CSS::Overflow::Scroll;
|
|
}
|
|
|
|
void BlockContainer::set_scroll_offset(const Gfx::FloatPoint& offset)
|
|
{
|
|
// FIXME: If there is horizontal and vertical scroll ignore only part of the new offset
|
|
if (offset.y() < 0 || m_scroll_offset == offset)
|
|
return;
|
|
m_scroll_offset = offset;
|
|
set_needs_display();
|
|
}
|
|
|
|
bool BlockContainer::handle_mousewheel(Badge<EventHandler>, const Gfx::IntPoint&, unsigned int, unsigned int, int wheel_delta_x, int wheel_delta_y)
|
|
{
|
|
if (!is_scrollable())
|
|
return false;
|
|
auto new_offset = m_scroll_offset;
|
|
new_offset.translate_by(wheel_delta_x, wheel_delta_y);
|
|
set_scroll_offset(new_offset);
|
|
|
|
return true;
|
|
}
|
|
|
|
}
|