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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Utf8View.h>
#include <LibGUI/Painter.h>
#include <LibWeb/Layout/LayoutDocument.h>
#include <LibWeb/Layout/LayoutText.h>
#include <LibWeb/Layout/LineBoxFragment.h>
#include <LibWeb/RenderingContext.h>
namespace Web {
void LineBoxFragment::render(RenderingContext& context)
{
for (auto* ancestor = layout_node().parent(); ancestor; ancestor = ancestor->parent()) {
if (!ancestor->is_visible())
return;
}
if (is<LayoutText>(layout_node())) {
to<LayoutText>(layout_node()).render_fragment(context, *this);
}
}
bool LineBoxFragment::is_justifiable_whitespace() const
{
return text() == " ";
}
StringView LineBoxFragment::text() const
{
if (!is<LayoutText>(layout_node()))
return {};
return to<LayoutText>(layout_node()).text_for_rendering().substring_view(m_start, m_length);
}
int LineBoxFragment::text_index_at(float x) const
{
if (!layout_node().is_text())
return 0;
auto& layout_text = to<LayoutText>(layout_node());
auto& font = layout_text.style().font();
Utf8View view(text());
float relative_x = x - m_rect.location().x();
float glyph_spacing = font.glyph_spacing();
float width_so_far = 0;
for (auto it = view.begin(); it != view.end(); ++it) {
float glyph_width = font.glyph_or_emoji_width(*it);
if ((width_so_far + glyph_width + glyph_spacing) > relative_x)
return m_start + view.byte_offset_of(it);
width_so_far += glyph_width + glyph_spacing;
}
return m_start + m_length - 1;
}
}
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