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/*
* Copyright (C) 2007 Apple Inc. 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 "WebCoreTextRenderer.h"
#include "Font.h"
#include "FontDescription.h"
#include "GraphicsContext.h"
#include "StringTruncator.h"
#include <wtf/unicode/Unicode.h>
namespace WebCore {
static bool shouldUseFontSmoothing = true;
static bool isOneLeftToRightRun(const TextRun& run)
{
for (int i = 0; i < run.length(); i++) {
WTF::Unicode::Direction direction = WTF::Unicode::direction(run[i]);
if (direction == WTF::Unicode::RightToLeft || direction > WTF::Unicode::OtherNeutral)
return false;
}
return true;
}
static void doDrawTextAtPoint(GraphicsContext& context, const String& text, const IntPoint& point, const Font& font, const Color& color, int underlinedIndex)
{
TextRun run(text.characters(), text.length());
context.setFillColor(color, ColorSpaceDeviceRGB);
if (isOneLeftToRightRun(run))
font.drawText(&context, run, point);
else
context.drawBidiText(font, run, point);
if (underlinedIndex >= 0) {
ASSERT(underlinedIndex < static_cast<int>(text.length()));
int beforeWidth;
if (underlinedIndex > 0) {
TextRun beforeRun(text.characters(), underlinedIndex);
beforeWidth = font.width(beforeRun);
} else
beforeWidth = 0;
TextRun underlinedRun(text.characters() + underlinedIndex, 1);
int underlinedWidth = font.width(underlinedRun);
IntPoint underlinePoint(point);
underlinePoint.move(beforeWidth, 1);
context.setStrokeColor(color, ColorSpaceDeviceRGB);
context.drawLineForText(underlinePoint, underlinedWidth, false);
}
}
void WebCoreDrawTextAtPoint(GraphicsContext& context, const String& text, const IntPoint& point, const Font& font, const Color& color, int underlinedIndex)
{
context.save();
doDrawTextAtPoint(context, text, point, font, color, underlinedIndex);
context.restore();
}
void WebCoreDrawDoubledTextAtPoint(GraphicsContext& context, const String& text, const IntPoint& point, const Font& font, const Color& topColor, const Color& bottomColor, int underlinedIndex)
{
context.save();
IntPoint textPos = point;
doDrawTextAtPoint(context, text, textPos, font, bottomColor, underlinedIndex);
textPos.move(0, -1);
doDrawTextAtPoint(context, text, textPos, font, topColor, underlinedIndex);
context.restore();
}
float WebCoreTextFloatWidth(const String& text, const Font& font)
{
return StringTruncator::width(text, font, false);
}
void WebCoreSetShouldUseFontSmoothing(bool smooth)
{
shouldUseFontSmoothing = smooth;
}
bool WebCoreShouldUseFontSmoothing()
{
return shouldUseFontSmoothing;
}
void WebCoreSetAlwaysUsesComplexTextCodePath(bool complex)
{
Font::setCodePath(complex ? Font::Complex : Font::Auto);
}
bool WebCoreAlwaysUsesComplexTextCodePath()
{
return Font::codePath() == Font::Complex;
}
} // namespace WebCore
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