15ed0ebdc6
We now perform hit testing in reverse paint order as described in CSS2's section about the z-index property.
133 lines
4.4 KiB
C++
133 lines
4.4 KiB
C++
/*
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* Copyright (c) 2018-2021, 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 <LibGfx/Painter.h>
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#include <LibWeb/Dump.h>
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#include <LibWeb/Layout/BlockContainer.h>
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#include <LibWeb/Layout/InitialContainingBlock.h>
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#include <LibWeb/Layout/InlineFormattingContext.h>
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#include <LibWeb/Layout/ReplacedBox.h>
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#include <LibWeb/Layout/TextNode.h>
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namespace Web::Layout {
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BlockContainer::BlockContainer(DOM::Document& document, DOM::Node* node, NonnullRefPtr<CSS::StyleProperties> style)
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: Box(document, node, move(style))
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{
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}
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BlockContainer::BlockContainer(DOM::Document& document, DOM::Node* node, CSS::ComputedValues computed_values)
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: Box(document, node, move(computed_values))
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{
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}
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BlockContainer::~BlockContainer()
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{
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}
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bool BlockContainer::should_clip_overflow() const
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{
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return computed_values().overflow_x() != CSS::Overflow::Visible && computed_values().overflow_y() != CSS::Overflow::Visible;
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}
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void BlockContainer::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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Box::paint(context, phase);
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if (!children_are_inline())
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return;
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if (should_clip_overflow()) {
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context.painter().save();
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// FIXME: Handle overflow-x and overflow-y being different values.
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context.painter().add_clip_rect(enclosing_int_rect(absolute_padding_box_rect()));
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context.painter().translate(-m_scroll_offset.to_type<int>());
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}
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for (auto& line_box : m_line_boxes) {
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for (auto& fragment : line_box.fragments()) {
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if (context.should_show_line_box_borders())
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context.painter().draw_rect(enclosing_int_rect(fragment.absolute_rect()), Color::Green);
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fragment.paint(context, phase);
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}
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}
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if (should_clip_overflow()) {
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context.painter().restore();
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}
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// FIXME: Merge this loop with the above somehow..
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if (phase == PaintPhase::FocusOutline) {
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for (auto& line_box : m_line_boxes) {
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for (auto& fragment : line_box.fragments()) {
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auto* node = fragment.layout_node().dom_node();
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if (!node)
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continue;
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auto* parent = node->parent_element();
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if (!parent)
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continue;
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if (parent->is_focused())
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context.painter().draw_rect(enclosing_int_rect(fragment.absolute_rect()), context.palette().focus_outline());
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}
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}
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}
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}
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HitTestResult BlockContainer::hit_test(const Gfx::IntPoint& position, HitTestType type) const
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{
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if (!children_are_inline())
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return Box::hit_test(position, type);
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HitTestResult last_good_candidate;
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for (auto& line_box : m_line_boxes) {
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for (auto& fragment : line_box.fragments()) {
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if (is<Box>(fragment.layout_node()) && verify_cast<Box>(fragment.layout_node()).stacking_context())
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continue;
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if (enclosing_int_rect(fragment.absolute_rect()).contains(position)) {
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if (is<BlockContainer>(fragment.layout_node()))
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return verify_cast<BlockContainer>(fragment.layout_node()).hit_test(position, type);
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return { fragment.layout_node(), fragment.text_index_at(position.x()) };
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}
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if (fragment.absolute_rect().top() <= position.y())
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last_good_candidate = { fragment.layout_node(), fragment.text_index_at(position.x()) };
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}
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}
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if (type == HitTestType::TextCursor && last_good_candidate.layout_node)
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return last_good_candidate;
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return { absolute_border_box_rect().contains(position.x(), position.y()) ? this : nullptr };
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}
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bool BlockContainer::is_scrollable() const
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{
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// FIXME: Support horizontal scroll as well (overflow-x)
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return computed_values().overflow_y() == CSS::Overflow::Scroll;
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}
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void BlockContainer::set_scroll_offset(const Gfx::FloatPoint& offset)
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{
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// FIXME: If there is horizontal and vertical scroll ignore only part of the new offset
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if (offset.y() < 0 || m_scroll_offset == offset)
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return;
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m_scroll_offset = offset;
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set_needs_display();
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}
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bool BlockContainer::handle_mousewheel(Badge<EventHandler>, const Gfx::IntPoint&, unsigned int, unsigned int, int wheel_delta_x, int wheel_delta_y)
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{
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if (!is_scrollable())
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return false;
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auto new_offset = m_scroll_offset;
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new_offset.translate_by(wheel_delta_x, wheel_delta_y);
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set_scroll_offset(new_offset);
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return true;
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}
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}
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