DragImageRef createDragImageForLink(URL& url, const String& inLabel, FontRenderingMode fontRenderingMode)
{
// This is more or less an exact match for the Mac OS X code.
const Font* labelFont;
const Font* urlFont;
FontCachePurgePreventer fontCachePurgePreventer;
if (fontRenderingMode == AlternateRenderingMode) {
static const Font alternateRenderingModeLabelFont = dragLabelFont(DragLinkLabelFontsize, true, AlternateRenderingMode);
static const Font alternateRenderingModeURLFont = dragLabelFont(DragLinkUrlFontSize, false, AlternateRenderingMode);
labelFont = &alternateRenderingModeLabelFont;
urlFont = &alternateRenderingModeURLFont;
} else {
static const Font normalRenderingModeLabelFont = dragLabelFont(DragLinkLabelFontsize, true, NormalRenderingMode);
static const Font normalRenderingModeURLFont = dragLabelFont(DragLinkUrlFontSize, false, NormalRenderingMode);
labelFont = &normalRenderingModeLabelFont;
urlFont = &normalRenderingModeURLFont;
}
bool drawURLString = true;
bool clipURLString = false;
bool clipLabelString = false;
String urlString = url.string();
String label = inLabel;
if (label.isEmpty()) {
drawURLString = false;
label = urlString;
}
// First step in 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() > MaxDragLabelStringWidth) {
labelSize.setWidth(MaxDragLabelStringWidth);
clipLabelString = true;
}
IntSize urlStringSize;
IntSize imageSize(labelSize.width() + DragLabelBorderX * 2, labelSize.height() + DragLabelBorderY * 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() > MaxDragLabelStringWidth) {
imageSize.setWidth(MaxDragLabelWidth);
clipURLString = true;
} else
imageSize.setWidth(std::max(labelSize.width(), urlStringSize.width()) + DragLabelBorderX * 2);
}
// We now know how big the image needs to be, so we create and
// fill the background
HWndDC dc(0);
auto workingDC = adoptGDIObject(::CreateCompatibleDC(dc));
if (!workingDC)
return 0;
PlatformGraphicsContext* contextRef;
auto image = allocImage(workingDC.get(), imageSize, &contextRef);
if (!image)
return 0;
::SelectObject(workingDC.get(), image.get());
GraphicsContext context(contextRef);
// On Mac alpha is {0.7, 0.7, 0.7, 0.8}, however we can't control alpha
// for drag images on win, so we use 1
static const Color backgroundColor(140, 140, 140);
static const IntSize radii(DragLabelRadius, DragLabelRadius);
IntRect rect(0, 0, imageSize.width(), imageSize.height());
context.fillRoundedRect(FloatRoundedRect(rect, radii, radii, radii, radii), backgroundColor, ColorSpaceDeviceRGB);
// Draw the text
static const Color topColor(0, 0, 0, 255); // original alpha = 0.75
static const Color bottomColor(255, 255, 255, 127); // original alpha = 0.5
if (drawURLString) {
if (clipURLString)
urlString = StringTruncator::rightTruncate(urlString, imageSize.width() - (DragLabelBorderX * 2.0f), *urlFont, StringTruncator::EnableRoundingHacks);
IntPoint textPos(DragLabelBorderX, imageSize.height() - (LabelBorderYOffset + urlFont->fontMetrics().descent()));
WebCoreDrawDoubledTextAtPoint(context, urlString, textPos, *urlFont, topColor, bottomColor);
}
if (clipLabelString)
label = StringTruncator::rightTruncate(label, imageSize.width() - (DragLabelBorderX * 2.0f), *labelFont, StringTruncator::EnableRoundingHacks);
IntPoint textPos(DragLabelBorderX, DragLabelBorderY + labelFont->pixelSize());
WebCoreDrawDoubledTextAtPoint(context, label, textPos, *labelFont, topColor, bottomColor);
deallocContext(contextRef);
return image.leak();
}
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);
}
