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https://github.com/LadybirdBrowser/ladybird.git
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5aeab9878e
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!)
83 lines
3.4 KiB
C++
83 lines
3.4 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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#include <AK/Utf8View.h>
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#include <LibWeb/Layout/Box.h>
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#include <LibWeb/Layout/LineBox.h>
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#include <LibWeb/Layout/Node.h>
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#include <LibWeb/Layout/TextNode.h>
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#include <ctype.h>
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namespace Web::Layout {
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void LineBox::add_fragment(const Node& layout_node, int start, int length, int width, int height)
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{
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bool text_align_is_justify = layout_node.style().text_align() == CSS::TextAlign::Justify;
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if (!text_align_is_justify && !m_fragments.is_empty() && &m_fragments.last().layout_node() == &layout_node) {
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// The fragment we're adding is from the last Layout::Node on the line.
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// Expand the last fragment instead of adding a new one with the same Layout::Node.
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m_fragments.last().m_length = (start - m_fragments.last().m_start) + length;
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m_fragments.last().set_width(m_fragments.last().width() + width);
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} else {
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m_fragments.append(make<LineBoxFragment>(layout_node, start, length, Gfx::FloatPoint(m_width, 0.0f), Gfx::FloatSize(width, height)));
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}
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m_width += width;
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if (is<Box>(layout_node))
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const_cast<Box&>(downcast<Box>(layout_node)).set_containing_line_box_fragment(m_fragments.last());
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}
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void LineBox::trim_trailing_whitespace()
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{
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while (!m_fragments.is_empty() && m_fragments.last().is_justifiable_whitespace()) {
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auto fragment = m_fragments.take_last();
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m_width -= fragment->width();
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}
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if (m_fragments.is_empty())
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return;
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auto last_text = m_fragments.last().text();
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if (last_text.is_null())
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return;
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auto& last_fragment = m_fragments.last();
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int space_width = last_fragment.layout_node().specified_style().font().glyph_width(' ');
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while (last_fragment.length() && isspace(last_text[last_fragment.length() - 1])) {
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last_fragment.m_length -= 1;
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last_fragment.set_width(last_fragment.width() - space_width);
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m_width -= space_width;
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}
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}
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bool LineBox::ends_in_whitespace() const
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{
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if (m_fragments.is_empty())
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return false;
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return m_fragments.last().ends_in_whitespace();
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}
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}
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