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/*
* Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2012 Intel Corporation
*
* 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 APPLE INC. ``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 APPLE INC. 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 "config.h"
#include "FontCascade.h"
#if USE(CAIRO)
#include "Font.h"
#include "GraphicsContext.h"
#include "HarfBuzzShaper.h"
#include "LayoutRect.h"
#include "Logging.h"
#include "NotImplemented.h"
#include "PlatformContextCairo.h"
#include <cairo.h>
namespace WebCore {
float FontCascade::getGlyphsAndAdvancesForComplexText(const TextRun& run, unsigned, unsigned, GlyphBuffer& glyphBuffer, ForTextEmphasisOrNot /* forTextEmphasis */) const
{
HarfBuzzShaper shaper(this, run);
if (!shaper.shape(&glyphBuffer)) {
LOG_ERROR("Shaper couldn't shape glyphBuffer.");
return 0;
}
// FIXME: Mac returns an initial advance here.
return 0;
}
bool FontCascade::canReturnFallbackFontsForComplexText()
{
return false;
}
bool FontCascade::canExpandAroundIdeographsInComplexText()
{
return false;
}
float FontCascade::floatWidthForComplexText(const TextRun& run, HashSet<const Font*>*, GlyphOverflow* glyphOverflow) const
{
if (glyphOverflow) {
// FIXME: Calculate the actual values rather than just the font's ascent and descent
glyphOverflow->top = glyphOverflow->computeBounds ? fontMetrics().ascent() : 0;
glyphOverflow->bottom = glyphOverflow->computeBounds ? fontMetrics().descent() : 0;
glyphOverflow->left = 0;
glyphOverflow->right = 0;
}
HarfBuzzShaper shaper(this, run);
if (shaper.shape())
return shaper.totalWidth();
LOG_ERROR("Shaper couldn't shape text run.");
return 0;
}
int FontCascade::offsetForPositionForComplexText(const TextRun& run, float x, bool) const
{
HarfBuzzShaper shaper(this, run);
if (shaper.shape())
return shaper.offsetForPosition(x);
LOG_ERROR("Shaper couldn't shape text run.");
return 0;
}
void FontCascade::adjustSelectionRectForComplexText(const TextRun& run, LayoutRect& selectionRect, unsigned from, unsigned to) const
{
HarfBuzzShaper shaper(this, run);
if (shaper.shape()) {
// FIXME: This should mimic Mac port.
FloatRect rect = shaper.selectionRect(FloatPoint(selectionRect.location()), selectionRect.height().toInt(), from, to);
selectionRect = LayoutRect(rect);
return;
}
LOG_ERROR("Shaper couldn't shape text run.");
}
} // namespace WebCore
#endif // USE(CAIRO)
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