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/*
* Copyright (C) 2021 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 "ImageOverlayController.h"
#include "Chrome.h"
#include "ChromeClient.h"
#include "Document.h"
#include "Editor.h"
#include "Frame.h"
#include "FrameSelection.h"
#include "GraphicsContext.h"
#include "HTMLElement.h"
#include "ImageOverlay.h"
#include "IntRect.h"
#include "LayoutRect.h"
#include "Page.h"
#include "PageOverlayController.h"
#include "PlatformMouseEvent.h"
#include "RenderElement.h"
#include "RenderStyle.h"
#include "SimpleRange.h"
#include "VisiblePosition.h"
namespace WebCore {
class FloatQuad;
ImageOverlayController::ImageOverlayController(Page& page)
: m_page(page)
{
}
void ImageOverlayController::selectionQuadsDidChange(Frame& frame, const Vector<FloatQuad>& quads)
{
if (!m_page || !m_page->chrome().client().needsImageOverlayControllerForSelectionPainting())
return;
if (frame.editor().ignoreSelectionChanges() || frame.editor().isGettingDictionaryPopupInfo())
return;
m_hostElementForSelection = nullptr;
m_selectionQuads.clear();
m_selectionBackgroundColor = Color::transparentBlack;
m_selectionClipRect = { };
auto overlayHost = ([&] () -> RefPtr<HTMLElement> {
auto selectedRange = frame.selection().selection().range();
if (!selectedRange)
return nullptr;
if (!ImageOverlay::isInsideOverlay(*selectedRange))
return nullptr;
if (RefPtr host = selectedRange->startContainer().shadowHost(); is<HTMLElement>(host))
return static_pointer_cast<HTMLElement>(WTFMove(host));
return nullptr;
})();
if (!overlayHost) {
uninstallPageOverlayIfNeeded();
return;
}
auto overlayHostRenderer = overlayHost->renderer();
if (!overlayHostRenderer) {
uninstallPageOverlayIfNeeded();
return;
}
if (!shouldUsePageOverlayToPaintSelection(*overlayHostRenderer)) {
uninstallPageOverlayIfNeeded();
return;
}
m_hostElementForSelection = *overlayHost;
m_selectionQuads = quads;
m_selectionBackgroundColor = overlayHostRenderer->selectionBackgroundColor();
m_selectionClipRect = overlayHostRenderer->absoluteBoundingBoxRect();
installPageOverlayIfNeeded().setNeedsDisplay();
}
bool ImageOverlayController::shouldUsePageOverlayToPaintSelection(const RenderElement& renderer)
{
// If the selection is already painted (with nonzero opacity) in the overlay host's renderer,
// then we don't need to fall back to a page overlay to paint the selection.
return renderer.style().opacity() <= 0.01;
}
void ImageOverlayController::documentDetached(const Document& document)
{
if (m_hostElementForSelection && &document == &m_hostElementForSelection->document())
m_hostElementForSelection = nullptr;
#if PLATFORM(MAC)
if (m_hostElementForDataDetectors && &document == &m_hostElementForDataDetectors->document())
m_hostElementForDataDetectors = nullptr;
#endif
uninstallPageOverlayIfNeeded();
}
PageOverlay& ImageOverlayController::installPageOverlayIfNeeded()
{
if (m_overlay)
return *m_overlay;
m_overlay = PageOverlay::create(*this, PageOverlay::OverlayType::Document);
m_page->pageOverlayController().installPageOverlay(*m_overlay, PageOverlay::FadeMode::DoNotFade);
return *m_overlay;
}
void ImageOverlayController::uninstallPageOverlay()
{
m_hostElementForSelection = nullptr;
m_selectionQuads.clear();
m_selectionBackgroundColor = Color::transparentBlack;
m_selectionClipRect = { };
#if PLATFORM(MAC)
clearDataDetectorHighlights();
#endif
auto overlayToUninstall = std::exchange(m_overlay, nullptr);
if (!m_page || !overlayToUninstall)
return;
m_page->pageOverlayController().uninstallPageOverlay(*overlayToUninstall, PageOverlay::FadeMode::DoNotFade);
}
void ImageOverlayController::uninstallPageOverlayIfNeeded()
{
if (m_hostElementForSelection)
return;
#if PLATFORM(MAC)
if (m_hostElementForDataDetectors)
return;
#endif
uninstallPageOverlay();
}
void ImageOverlayController::willMoveToPage(PageOverlay&, Page* page)
{
if (!page)
uninstallPageOverlay();
}
void ImageOverlayController::drawRect(PageOverlay& pageOverlay, GraphicsContext& context, const IntRect& dirtyRect)
{
if (&pageOverlay != m_overlay) {
ASSERT_NOT_REACHED();
return;
}
GraphicsContextStateSaver stateSaver(context);
context.clearRect(dirtyRect);
if (m_selectionQuads.isEmpty())
return;
Path coalescedSelectionPath;
for (auto& quad : m_selectionQuads) {
coalescedSelectionPath.moveTo(quad.p1());
coalescedSelectionPath.addLineTo(quad.p2());
coalescedSelectionPath.addLineTo(quad.p3());
coalescedSelectionPath.addLineTo(quad.p4());
coalescedSelectionPath.addLineTo(quad.p1());
coalescedSelectionPath.closeSubpath();
}
context.setFillColor(m_selectionBackgroundColor);
context.clip(m_selectionClipRect);
context.fillPath(coalescedSelectionPath);
}
#if !PLATFORM(MAC)
bool ImageOverlayController::platformHandleMouseEvent(const PlatformMouseEvent&)
{
return false;
}
void ImageOverlayController::elementUnderMouseDidChange(Frame&, Element*)
{
}
#if ENABLE(DATA_DETECTION)
void ImageOverlayController::textRecognitionResultsChanged(HTMLElement&)
{
}
bool ImageOverlayController::hasActiveDataDetectorHighlightForTesting() const
{
return false;
}
#endif // ENABLE(DATA_DETECTION)
#endif // !PLATFORM(MAC)
} // namespace WebCore