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/*
* Copyright (C) 2007 Kevin Ollivier. 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 APPLE COMPUTER, 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 COMPUTER, 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 "Font.h"
#include "FontFallbackList.h"
#include "GlyphBuffer.h"
#include "GraphicsContext.h"
#include "IntRect.h"
#include "NotImplemented.h"
#include "SimpleFontData.h"
#include "TextRun.h"
#if OS(WINDOWS)
#include "UniscribeController.h"
typedef WebCore::UniscribeController ComplexTextController;
#endif
#if OS(DARWIN)
#include "mac/ComplexTextController.h"
#endif
#include <wx/dcclient.h>
#include "fontprops.h"
#include "non-kerned-drawing.h"
namespace WebCore {
bool Font::canReturnFallbackFontsForComplexText()
{
#if OS(WINDOWS) || OS(DARWIN)
return true;
#else
return false;
#endif
}
bool Font::canExpandAroundIdeographsInComplexText()
{
#if OS(DARWIN)
return true;
#else
return false;
#endif
}
void Font::drawGlyphs(GraphicsContext* graphicsContext, const SimpleFontData* font, const GlyphBuffer& glyphBuffer,
int from, int numGlyphs, const FloatPoint& point) const
{
// prepare DC
Color color = graphicsContext->fillColor();
// We can't use wx drawing methods on Win/Linux because they automatically kern text
// so we've created a function with platform dependent drawing implementations that
// will hopefully be folded into wx once the API has solidified.
// see platform/wx/wxcode/<platform> for the implementations.
graphicsContext->save();
drawTextWithSpacing(graphicsContext, font, color, glyphBuffer, from, numGlyphs, point);
graphicsContext->restore();
}
FloatRect Font::selectionRectForComplexText(const TextRun& run, const FloatPoint& point, int h, int from, int to) const
{
#if OS(WINDOWS) || OS(DARWIN)
ComplexTextController it(this, run);
it.advance(from);
float beforeWidth = it.runWidthSoFar();
it.advance(to);
float afterWidth = it.runWidthSoFar();
// Using roundf() rather than ceilf() for the right edge as a compromise to ensure correct caret positioning
if (run.rtl()) {
#if OS(WINDOWS)
it.advance(run.length());
float totalWidth = it.runWidthSoFar();
return FloatRect(point.x() + floorf(totalWidth - afterWidth), point.y(), roundf(totalWidth - beforeWidth) - floorf(totalWidth - afterWidth), h);
#else
float totalWidth = it.totalWidth();
return FloatRect(point.x() + floorf(totalWidth - afterWidth), point.y(), roundf(totalWidth - beforeWidth) - floorf(totalWidth - afterWidth), h);
#endif
}
return FloatRect(point.x() + floorf(beforeWidth), point.y(), roundf(afterWidth) - floorf(beforeWidth), h);
#else
notImplemented();
return FloatRect();
#endif
}
float Font::getGlyphsAndAdvancesForComplexText(const TextRun& /* run */, int /* from */, int /* to */, GlyphBuffer& /* glyphBuffer */, ForTextEmphasisOrNot /* forTextEmphasis */) const
{
// FIXME: Implement this by moving most of the drawComplexText() implementation in here. Set up the
// ComplexTextController according to forTextEmphasis.
notImplemented();
return 0;
}
void Font::drawComplexText(GraphicsContext* context, const TextRun& run, const FloatPoint& point, int from, int to) const
{
#if OS(WINDOWS) || OS(DARWIN)
// This glyph buffer holds our glyphs + advances + font data for each glyph.
GlyphBuffer glyphBuffer;
float startX = point.x();
ComplexTextController controller(this, run);
controller.advance(from);
float beforeWidth = controller.runWidthSoFar();
controller.advance(to, &glyphBuffer);
// We couldn't generate any glyphs for the run. Give up.
if (glyphBuffer.isEmpty())
return;
float afterWidth = controller.runWidthSoFar();
if (run.rtl()) {
#if OS(WINDOWS)
controller.advance(run.length());
startX += controller.runWidthSoFar() - afterWidth;
#else
startX += controller.totalWidth() - afterWidth;
for (int i = 0, end = glyphBuffer.size() - 1; i < glyphBuffer.size() / 2; ++i, --end)
glyphBuffer.swap(i, end);
#endif
} else
startX += beforeWidth;
// Draw the glyph buffer now at the starting point returned in startX.
FloatPoint startPoint(startX, point.y());
drawGlyphBuffer(context, run, glyphBuffer, startPoint);
#else
notImplemented();
#endif
}
void Font::drawEmphasisMarksForComplexText(GraphicsContext* context, const TextRun& run, const AtomicString& mark, const FloatPoint& point, int from, int to) const
{
GlyphBuffer glyphBuffer;
float initialAdvance = getGlyphsAndAdvancesForComplexText(run, from, to, glyphBuffer, ForTextEmphasis);
if (glyphBuffer.isEmpty())
return;
drawEmphasisMarks(context, run, glyphBuffer, mark, FloatPoint(point.x() + initialAdvance, point.y()));
}
float Font::floatWidthForComplexText(const TextRun& run, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow*) const
{
#if OS(WINDOWS) || OS(DARWIN)
ComplexTextController controller(this, run, fallbackFonts);
#if OS(WINDOWS)
controller.advance(run.length());
return controller.runWidthSoFar();
#else
return controller.totalWidth();
#endif
#else
notImplemented();
return 0;
#endif
}
int Font::offsetForPositionForComplexText(const TextRun& run, float x, bool includePartialGlyphs) const
{
#if OS(WINDOWS) || OS(DARWIN)
ComplexTextController controller(this, run);
return controller.offsetForPosition(x, includePartialGlyphs);
#else
notImplemented();
return 0;
#endif
}
}
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