DragImageRef createDragImageForRange(Frame& frame, Range& range, bool forceBlackText)
{
frame.document()->updateLayout();
RenderView* view = frame.contentRenderer();
if (!view)
return nullptr;
// To snapshot the range, temporarily select it and take selection snapshot.
Position start = range.startPosition();
Position candidate = start.downstream();
if (candidate.deprecatedNode() && candidate.deprecatedNode()->renderer())
start = candidate;
Position end = range.endPosition();
candidate = end.upstream();
if (candidate.deprecatedNode() && candidate.deprecatedNode()->renderer())
end = candidate;
if (start.isNull() || end.isNull() || start == end)
return nullptr;
const ScopedFrameSelectionState selectionState(frame);
RenderObject* startRenderer = start.deprecatedNode()->renderer();
RenderObject* endRenderer = end.deprecatedNode()->renderer();
if (!startRenderer || !endRenderer)
return nullptr;
SnapshotOptions options = forceBlackText ? SnapshotOptionsForceBlackText : SnapshotOptionsNone;
view->setSelection(startRenderer, start.deprecatedEditingOffset(), endRenderer, end.deprecatedEditingOffset(), RenderView::RepaintNothing);
std::unique_ptr<ImageBuffer> snapshot = snapshotSelection(frame, options);
return createDragImageFromSnapshot(std::move(snapshot), nullptr);
}
PassRefPtr<ShareableBitmap> WebFrame::createSelectionSnapshot() const
{
std::unique_ptr<ImageBuffer> snapshot = snapshotSelection(*coreFrame(), WebCore::SnapshotOptionsForceBlackText);
if (!snapshot)
return nullptr;
RefPtr<ShareableBitmap> sharedSnapshot = ShareableBitmap::createShareable(snapshot->internalSize(), ShareableBitmap::SupportsAlpha);
if (!sharedSnapshot)
return nullptr;
// FIXME: We should consider providing a way to use subpixel antialiasing for the snapshot
// if we're compositing this image onto a solid color (e.g. the modern find indicator style).
auto graphicsContext = sharedSnapshot->createGraphicsContext();
float deviceScaleFactor = coreFrame()->page()->deviceScaleFactor();
graphicsContext->scale(FloatSize(deviceScaleFactor, deviceScaleFactor));
graphicsContext->drawImageBuffer(snapshot.get(), ColorSpaceDeviceRGB, FloatPoint());
return sharedSnapshot.release();
}
DragImageRef createDragImageForSelection(Frame& frame, bool forceBlackText)
{
SnapshotOptions options = forceBlackText ? SnapshotOptionsForceBlackText : SnapshotOptionsNone;
std::unique_ptr<ImageBuffer> snapshot = snapshotSelection(frame, options);
return createDragImageFromSnapshot(std::move(snapshot), nullptr);
}
