SVGTextMetricsCalculator::SVGTextMetricsCalculator(RenderSVGInlineText* text)
: m_text(text)
, m_bidiRun(0)
, m_run(SVGTextMetrics::constructTextRun(text, 0, text->textLength()))
, m_isComplexText(false)
, m_totalWidth(0)
{
const Font& scaledFont = text->scaledFont();
CodePath codePath = scaledFont.codePath(TextRunPaintInfo(m_run));
m_isComplexText = codePath == ComplexPath;
m_run.setCharacterScanForCodePath(!m_isComplexText);
m_run.setUseComplexCodePath(m_isComplexText);
if (!m_isComplexText)
m_simpleShaper = adoptPtr(new SimpleShaper(&scaledFont, m_run));
else
setupBidiRuns();
}
PassOwnPtr<DragImage> DragImage::create(const KURL& url, const String& inLabel, const FontDescription& systemFont, float deviceScaleFactor)
{
const Font labelFont = deriveDragLabelFont(kDragLinkLabelFontSize, FontWeightBold, systemFont);
const Font urlFont = deriveDragLabelFont(kDragLinkUrlFontSize, FontWeightNormal, systemFont);
FontCachePurgePreventer fontCachePurgePreventer;
bool drawURLString = true;
bool clipURLString = false;
bool clipLabelString = false;
String urlString = url.string();
String label = inLabel.stripWhiteSpace();
if (label.isEmpty()) {
drawURLString = false;
label = urlString;
}
// First step is drawing the link drag image width.
TextRun labelRun(label.impl());
TextRun urlRun(urlString.impl());
IntSize labelSize(labelFont.width(labelRun), labelFont.fontMetrics().ascent() + labelFont.fontMetrics().descent());
if (labelSize.width() > kMaxDragLabelStringWidth) {
labelSize.setWidth(kMaxDragLabelStringWidth);
clipLabelString = true;
}
IntSize urlStringSize;
IntSize imageSize(labelSize.width() + kDragLabelBorderX * 2, labelSize.height() + kDragLabelBorderY * 2);
if (drawURLString) {
urlStringSize.setWidth(urlFont.width(urlRun));
urlStringSize.setHeight(urlFont.fontMetrics().ascent() + urlFont.fontMetrics().descent());
imageSize.setHeight(imageSize.height() + urlStringSize.height());
if (urlStringSize.width() > kMaxDragLabelStringWidth) {
imageSize.setWidth(kMaxDragLabelWidth);
clipURLString = true;
} else
imageSize.setWidth(std::max(labelSize.width(), urlStringSize.width()) + kDragLabelBorderX * 2);
}
// We now know how big the image needs to be, so we create and
// fill the background
IntSize scaledImageSize = imageSize;
scaledImageSize.scale(deviceScaleFactor);
OwnPtr<ImageBuffer> buffer(ImageBuffer::create(scaledImageSize));
if (!buffer)
return nullptr;
buffer->context()->scale(FloatSize(deviceScaleFactor, deviceScaleFactor));
const float DragLabelRadius = 5;
const IntSize radii(DragLabelRadius, DragLabelRadius);
IntRect rect(IntPoint(), imageSize);
const Color backgroundColor(140, 140, 140);
buffer->context()->fillRoundedRect(rect, radii, radii, radii, radii, backgroundColor);
// Draw the text
if (drawURLString) {
if (clipURLString)
urlString = StringTruncator::centerTruncate(urlString, imageSize.width() - (kDragLabelBorderX * 2.0f), urlFont, StringTruncator::EnableRoundingHacks);
IntPoint textPos(kDragLabelBorderX, imageSize.height() - (kLabelBorderYOffset + urlFont.fontMetrics().descent()));
TextRun textRun(urlString);
buffer->context()->drawText(urlFont, TextRunPaintInfo(textRun), textPos);
}
if (clipLabelString)
label = StringTruncator::rightTruncate(label, imageSize.width() - (kDragLabelBorderX * 2.0f), labelFont, StringTruncator::EnableRoundingHacks);
bool hasStrongDirectionality;
TextRun textRun = textRunWithDirectionality(label, hasStrongDirectionality);
IntPoint textPos(kDragLabelBorderX, kDragLabelBorderY + labelFont.fontDescription().computedPixelSize());
if (hasStrongDirectionality && textRun.direction() == RTL) {
float textWidth = urlFont.width(textRun);
int availableWidth = imageSize.width() - kDragLabelBorderX * 2;
textPos.setX(availableWidth - ceilf(textWidth));
}
buffer->context()->drawBidiText(urlFont, TextRunPaintInfo(textRun), textPos);
RefPtr<Image> image = buffer->copyImage();
return DragImage::create(image.get(), DoNotRespectImageOrientation, deviceScaleFactor);
}
