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e2b4fef6c7
The text cursor follows slightly different "intuitive" rules than the regular hit testing. Clicking past the right edge of a text box should still "hit" the text box, and place the cursor at its end, for example. We solve this by adding a HitTestType enum that is passed to hit_test() and determines whether past-the-edge candidates are considered.
124 lines
4.4 KiB
C++
124 lines
4.4 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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#pragma once
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#include <LibWeb/Layout/LayoutBox.h>
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#include <LibWeb/Layout/LineBox.h>
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namespace Web {
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class LayoutBlock : public LayoutBox {
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public:
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LayoutBlock(DOM::Document&, DOM::Node*, NonnullRefPtr<CSS::StyleProperties>);
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virtual ~LayoutBlock() override;
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virtual const char* class_name() const override { return "LayoutBlock"; }
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virtual void layout(LayoutMode = LayoutMode::Default) override;
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virtual void paint(PaintContext&, PaintPhase) override;
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virtual LayoutNode& inline_wrapper() override;
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Vector<LineBox>& line_boxes() { return m_line_boxes; }
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const Vector<LineBox>& line_boxes() const { return m_line_boxes; }
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LineBox& ensure_last_line_box();
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LineBox& add_line_box();
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virtual HitTestResult hit_test(const Gfx::IntPoint&, HitTestType) const override;
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LayoutBlock* previous_sibling() { return downcast<LayoutBlock>(LayoutNode::previous_sibling()); }
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const LayoutBlock* previous_sibling() const { return downcast<LayoutBlock>(LayoutNode::previous_sibling()); }
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LayoutBlock* next_sibling() { return downcast<LayoutBlock>(LayoutNode::next_sibling()); }
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const LayoutBlock* next_sibling() const { return downcast<LayoutBlock>(LayoutNode::next_sibling()); }
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template<typename Callback>
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void for_each_fragment(Callback);
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template<typename Callback>
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void for_each_fragment(Callback) const;
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virtual void split_into_lines(LayoutBlock& container, LayoutMode) override;
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void layout_inside(LayoutMode);
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protected:
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void compute_width();
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void compute_height();
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void layout_absolutely_positioned_descendants();
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virtual float width_of_logical_containing_block() const;
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private:
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virtual bool is_block() const override { return true; }
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struct ShrinkToFitResult {
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float preferred_width { 0 };
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float preferred_minimum_width { 0 };
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};
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ShrinkToFitResult calculate_shrink_to_fit_width();
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void compute_width_for_absolutely_positioned_block();
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void place_block_level_non_replaced_element_in_normal_flow(LayoutBlock&);
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void place_block_level_replaced_element_in_normal_flow(LayoutReplaced&);
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void layout_absolutely_positioned_descendant(LayoutBox&);
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NonnullRefPtr<CSS::StyleProperties> style_for_anonymous_block() const;
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void layout_inline_children(LayoutMode);
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void layout_contained_boxes(LayoutMode);
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Vector<LineBox> m_line_boxes;
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};
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template<typename Callback>
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void LayoutBlock::for_each_fragment(Callback callback)
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{
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for (auto& line_box : line_boxes()) {
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for (auto& fragment : line_box.fragments()) {
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if (callback(fragment) == IterationDecision::Break)
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return;
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}
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}
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}
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template<typename Callback>
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void LayoutBlock::for_each_fragment(Callback callback) const
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{
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for (auto& line_box : line_boxes()) {
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for (auto& fragment : line_box.fragments()) {
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if (callback(fragment) == IterationDecision::Break)
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return;
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}
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}
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}
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}
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AK_BEGIN_TYPE_TRAITS(Web::LayoutBlock)
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static bool is_type(const Web::LayoutNode& layout_node) { return layout_node.is_block(); }
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AK_END_TYPE_TRAITS()
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