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/*
* Copyright (C) Research In Motion Limited 2010. 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 "core/rendering/svg/SVGTextLayoutEngineSpacing.h"
#include "core/svg/SVGLengthContext.h"
#include "platform/fonts/Character.h"
#include "platform/fonts/Font.h"
namespace blink {
SVGTextLayoutEngineSpacing::SVGTextLayoutEngineSpacing(const Font& font, float effectiveZoom)
: m_font(font)
, m_lastCharacter(0)
, m_effectiveZoom(effectiveZoom)
{
ASSERT(m_effectiveZoom);
}
float SVGTextLayoutEngineSpacing::calculateCSSSpacing(UChar currentCharacter)
{
UChar lastCharacter = m_lastCharacter;
m_lastCharacter = currentCharacter;
if (!m_font.fontDescription().letterSpacing() && !m_font.fontDescription().wordSpacing())
return 0;
float spacing = m_font.fontDescription().letterSpacing();
if (currentCharacter && lastCharacter && m_font.fontDescription().wordSpacing()) {
if (Character::treatAsSpace(currentCharacter) && !Character::treatAsSpace(lastCharacter))
spacing += m_font.fontDescription().wordSpacing();
}
if (m_effectiveZoom != 1)
spacing = spacing / m_effectiveZoom;
return spacing;
}
}
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