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.
93 lines
3.1 KiB
C++
93 lines
3.1 KiB
C++
/*
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* Copyright (c) 2018-2022, 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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#include <LibWeb/Painting/Paintable.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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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 : paint_box()->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()).m_paint_box->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 { m_paint_box->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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Painting::PaintableWithLines const* BlockContainer::paint_box() const
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{
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return static_cast<Painting::PaintableWithLines const*>(Box::paint_box());
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}
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OwnPtr<Painting::Paintable> BlockContainer::create_paintable() const
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{
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return Painting::PaintableWithLines::create(*this);
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}
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}
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