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/*
* Copyright (C) Research In Motion Limited 2010-2012. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "SVGTextMetrics.h"
#include "RenderSVGInlineText.h"
#include "UnicodeBidi.h"
namespace WebCore {
SVGTextMetrics::SVGTextMetrics(const RenderSVGInlineText& textRenderer, const TextRun& run)
{
float scalingFactor = textRenderer.scalingFactor();
ASSERT(scalingFactor);
const FontCascade& scaledFont = textRenderer.scaledFont();
// Calculate width/height using the scaled font, divide this result by the scalingFactor afterwards.
m_width = scaledFont.width(run) / scalingFactor;
m_glyph.name = emptyString();
m_height = scaledFont.metricsOfPrimaryFont().height() / scalingFactor;
m_glyph.unicodeString = run.text().toString();
m_glyph.isValid = true;
m_length = static_cast<unsigned>(run.length());
}
TextRun SVGTextMetrics::constructTextRun(const RenderSVGInlineText& text, unsigned position, unsigned length)
{
const RenderStyle& style = text.style();
TextRun run(StringView(text.text()).substring(position, length),
0, /* xPos, only relevant with allowTabs=true */
0, /* padding, only relevant for justified text, not relevant for SVG */
ExpansionBehavior::allowRightOnly(),
style.writingMode().bidiDirection(),
isOverride(style.unicodeBidi()) /* directionalOverride */);
// We handle letter & word spacing ourselves.
run.disableSpacing();
return run;
}
SVGTextMetrics SVGTextMetrics::measureCharacterRange(const RenderSVGInlineText& text, unsigned position, unsigned length)
{
return SVGTextMetrics(text, constructTextRun(text, position, length));
}
SVGTextMetrics::SVGTextMetrics(const RenderSVGInlineText& text, unsigned length, float width)
{
float scalingFactor = text.scalingFactor();
ASSERT(scalingFactor);
m_width = width / scalingFactor;
m_height = text.scaledFont().metricsOfPrimaryFont().height() / scalingFactor;
m_length = length;
}
}
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