mirror of
https://github.com/RGBCube/serenity
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830a57c6b2
Let's rename this to LibWeb since it aims to provide more parts of the web platform than just HTML. :^)
81 lines
2.9 KiB
C++
81 lines
2.9 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 <LibGUI/Painter.h>
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#include <LibWeb/Layout/LayoutDocument.h>
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#include <LibWeb/Layout/LayoutText.h>
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#include <LibWeb/Layout/LineBoxFragment.h>
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#include <LibWeb/RenderingContext.h>
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namespace Web {
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void LineBoxFragment::render(RenderingContext& context)
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{
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for (auto* ancestor = layout_node().parent(); ancestor; ancestor = ancestor->parent()) {
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if (!ancestor->is_visible())
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return;
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}
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if (is<LayoutText>(layout_node())) {
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to<LayoutText>(layout_node()).render_fragment(context, *this);
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}
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}
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bool LineBoxFragment::is_justifiable_whitespace() const
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{
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return text() == " ";
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}
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StringView LineBoxFragment::text() const
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{
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if (!is<LayoutText>(layout_node()))
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return {};
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return to<LayoutText>(layout_node()).text_for_rendering().substring_view(m_start, m_length);
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}
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int LineBoxFragment::text_index_at(float x) const
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{
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if (!layout_node().is_text())
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return 0;
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auto& layout_text = to<LayoutText>(layout_node());
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auto& font = layout_text.style().font();
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Utf8View view(text());
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float relative_x = x - m_rect.location().x();
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float glyph_spacing = font.glyph_spacing();
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float width_so_far = 0;
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for (auto it = view.begin(); it != view.end(); ++it) {
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float glyph_width = font.glyph_or_emoji_width(*it);
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if ((width_so_far + glyph_width + glyph_spacing) > relative_x)
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return m_start + view.byte_offset_of(it);
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width_so_far += glyph_width + glyph_spacing;
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}
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return m_start + m_length - 1;
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}
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}
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