Source/WebKit2/WebProcess/WebPage/FindController.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2010 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 "FindController.h"

 #include "ShareableBitmap.h"
 #include "WKPage.h"
 #include "WebCoreArgumentCoders.h"
 #include "WebPage.h"
 #include "WebPageProxyMessages.h"
 #include "WebProcess.h"
 #include <WebCore/DocumentMarkerController.h>
 #include <WebCore/FloatQuad.h>
 #include <WebCore/FocusController.h>
 #include <WebCore/Frame.h>
 #include <WebCore/FrameView.h>
 #include <WebCore/GraphicsContext.h>
 #include <WebCore/Page.h>

 using namespace std;
 using namespace WebCore;

 namespace WebKit {

 static WebCore::FindOptions core(FindOptions options)
 {
     return (options & FindOptionsCaseInsensitive ? CaseInsensitive : 0)
         | (options & FindOptionsAtWordStarts ? AtWordStarts : 0)
         | (options & FindOptionsTreatMedialCapitalAsWordStart ? TreatMedialCapitalAsWordStart : 0)
         | (options & FindOptionsBackwards ? Backwards : 0)
         | (options & FindOptionsWrapAround ? WrapAround : 0);
 }

 FindController::FindController(WebPage* webPage)
     : m_webPage(webPage)
     , m_findPageOverlay(0)
     , m_isShowingFindIndicator(false)
 {
 }

 FindController::~FindController()
 {
 }

 void FindController::countStringMatches(const String& string, FindOptions options, unsigned maxMatchCount)
 {
     if (maxMatchCount == numeric_limits<unsigned>::max())
         --maxMatchCount;

     unsigned matchCount = m_webPage->corePage()->markAllMatchesForText(string, core(options), false, maxMatchCount + 1);
     m_webPage->corePage()->unmarkAllTextMatches();

     // Check if we have more matches than allowed.
     if (matchCount > maxMatchCount)
         matchCount = static_cast<unsigned>(kWKMoreThanMaximumMatchCount);

     m_webPage->send(Messages::WebPageProxy::DidCountStringMatches(string, matchCount));
 }

 static Frame* frameWithSelection(Page* page)
 {
     for (Frame* frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
         if (frame->selection()->isRange())
             return frame;
     }

     return 0;
 }

 void FindController::updateFindUIAfterPageScroll(bool found, const String& string, FindOptions options, unsigned maxMatchCount)
 {
     Frame* selectedFrame = frameWithSelection(m_webPage->corePage());

     bool shouldShowOverlay = false;

     if (!found) {
         m_webPage->corePage()->unmarkAllTextMatches();

         // Clear the selection.
         if (selectedFrame)
             selectedFrame->selection()->clear();

         hideFindIndicator();

         m_webPage->send(Messages::WebPageProxy::DidFailToFindString(string));
     } else {
         shouldShowOverlay = options & FindOptionsShowOverlay;
         bool shouldShowHighlight = options & FindOptionsShowHighlight;
         unsigned matchCount = 1;

         if (shouldShowOverlay || shouldShowHighlight) {

             if (maxMatchCount == numeric_limits<unsigned>::max())
                 --maxMatchCount;

             m_webPage->corePage()->unmarkAllTextMatches();
             matchCount = m_webPage->corePage()->markAllMatchesForText(string, core(options), shouldShowHighlight, maxMatchCount + 1);

             // Check if we have more matches than allowed.
             if (matchCount > maxMatchCount) {
                 shouldShowOverlay = false;
                 matchCount = static_cast<unsigned>(kWKMoreThanMaximumMatchCount);
             }
         }

         m_webPage->send(Messages::WebPageProxy::DidFindString(string, matchCount));

         if (!(options & FindOptionsShowFindIndicator) || !updateFindIndicator(selectedFrame, shouldShowOverlay)) {
             // Either we shouldn't show the find indicator, or we couldn't update it.
             hideFindIndicator();
         }
     }

     if (!shouldShowOverlay) {
         if (m_findPageOverlay) {
             // Get rid of the overlay.
             m_webPage->uninstallPageOverlay(m_findPageOverlay, false);
         }

         ASSERT(!m_findPageOverlay);
     } else {
         if (!m_findPageOverlay) {
             RefPtr<PageOverlay> findPageOverlay = PageOverlay::create(this);
             m_findPageOverlay = findPageOverlay.get();
             m_webPage->installPageOverlay(findPageOverlay.release());
         } else {
             // The page overlay needs to be repainted.
             m_findPageOverlay->setNeedsDisplay();
         }
     }
 }

 void FindController::findString(const String& string, FindOptions options, unsigned maxMatchCount)
 {
     bool found = m_webPage->corePage()->findString(string, core(options));

     m_webPage->drawingArea()->dispatchAfterEnsuringUpdatedScrollPosition(WTF::bind(&FindController::updateFindUIAfterPageScroll, this, found, string, options, maxMatchCount));
 }

 void FindController::hideFindUI()
 {
     if (m_findPageOverlay)
         m_webPage->uninstallPageOverlay(m_findPageOverlay, false);

     m_webPage->corePage()->unmarkAllTextMatches();
     hideFindIndicator();
 }

 bool FindController::updateFindIndicator(Frame* selectedFrame, bool isShowingOverlay, bool shouldAnimate)
 {
     if (!selectedFrame)
         return false;

     IntRect selectionRect = enclosingIntRect(selectedFrame->selection()->bounds());

     // Selection rect can be empty for matches that are currently obscured from view.
     if (selectionRect.isEmpty())
         return false;

     // We want the selection rect in window coordinates.
     IntRect selectionRectInWindowCoordinates = selectedFrame->view()->contentsToWindow(selectionRect);

     Vector<FloatRect> textRects;
     selectedFrame->selection()->getClippedVisibleTextRectangles(textRects);

     IntSize backingStoreSize = selectionRect.size();
     backingStoreSize.scale(m_webPage->corePage()->deviceScaleFactor());

     // Create a backing store and paint the find indicator text into it.
     RefPtr<ShareableBitmap> findIndicatorTextBackingStore = ShareableBitmap::createShareable(backingStoreSize, ShareableBitmap::SupportsAlpha);
     if (!findIndicatorTextBackingStore)
         return false;

     OwnPtr<GraphicsContext> graphicsContext = findIndicatorTextBackingStore->createGraphicsContext();
     graphicsContext->scale(FloatSize(m_webPage->corePage()->deviceScaleFactor(), m_webPage->corePage()->deviceScaleFactor()));

     IntRect paintRect = selectionRect;
     paintRect.move(selectedFrame->view()->frameRect().x(), selectedFrame->view()->frameRect().y());
     paintRect.move(-selectedFrame->view()->scrollOffset());

     graphicsContext->translate(-paintRect.x(), -paintRect.y());
     selectedFrame->view()->setPaintBehavior(PaintBehaviorSelectionOnly | PaintBehaviorForceBlackText | PaintBehaviorFlattenCompositingLayers);
     selectedFrame->document()->updateLayout();

     selectedFrame->view()->paint(graphicsContext.get(), paintRect);
     selectedFrame->view()->setPaintBehavior(PaintBehaviorNormal);

     ShareableBitmap::Handle handle;
     if (!findIndicatorTextBackingStore->createHandle(handle))
         return false;

     // We want the text rects in selection rect coordinates.
     Vector<FloatRect> textRectsInSelectionRectCoordinates;

     for (size_t i = 0; i < textRects.size(); ++i) {
         IntRect textRectInSelectionRectCoordinates = selectedFrame->view()->contentsToWindow(enclosingIntRect(textRects[i]));
         textRectInSelectionRectCoordinates.move(-selectionRectInWindowCoordinates.x(), -selectionRectInWindowCoordinates.y());

         textRectsInSelectionRectCoordinates.append(textRectInSelectionRectCoordinates);
     }

     m_webPage->send(Messages::WebPageProxy::SetFindIndicator(selectionRectInWindowCoordinates, textRectsInSelectionRectCoordinates, m_webPage->corePage()->deviceScaleFactor(), handle, !isShowingOverlay, shouldAnimate));
     m_findIndicatorRect = selectionRectInWindowCoordinates;
     m_isShowingFindIndicator = true;

     return true;
 }

 void FindController::hideFindIndicator()
 {
     if (!m_isShowingFindIndicator)
         return;

     ShareableBitmap::Handle handle;
     m_webPage->send(Messages::WebPageProxy::SetFindIndicator(FloatRect(), Vector<FloatRect>(), m_webPage->corePage()->deviceScaleFactor(), handle, false, true));
     m_isShowingFindIndicator = false;
 }

 void FindController::showFindIndicatorInSelection()
 {
     Frame* selectedFrame = m_webPage->corePage()->focusController()->focusedOrMainFrame();
     if (!selectedFrame)
         return;

     updateFindIndicator(selectedFrame, false);
 }

 void FindController::deviceScaleFactorDidChange()
 {
     ASSERT(isShowingOverlay());

     Frame* selectedFrame = frameWithSelection(m_webPage->corePage());
     if (!selectedFrame)
         return;

     updateFindIndicator(selectedFrame, true, false);
 }

 Vector<IntRect> FindController::rectsForTextMatches()
 {
     Vector<IntRect> rects;

     for (Frame* frame = m_webPage->corePage()->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
         Document* document = frame->document();
         if (!document)
             continue;

         IntRect visibleRect = frame->view()->visibleContentRect();
         Vector<IntRect> frameRects = document->markers()->renderedRectsForMarkers(DocumentMarker::TextMatch);
         IntPoint frameOffset(-frame->view()->scrollOffset().width(), -frame->view()->scrollOffset().height());
         frameOffset = frame->view()->convertToContainingWindow(frameOffset);

         for (Vector<IntRect>::iterator it = frameRects.begin(), end = frameRects.end(); it != end; ++it) {
             it->intersect(visibleRect);
             it->move(frameOffset.x(), frameOffset.y());
             rects.append(*it);
         }
     }

     return rects;
 }

 void FindController::pageOverlayDestroyed(PageOverlay*)
 {
 }

 void FindController::willMoveToWebPage(PageOverlay*, WebPage* webPage)
 {
     if (webPage)
         return;

     // The page overlay is moving away from the web page, reset it.
     ASSERT(m_findPageOverlay);
     m_findPageOverlay = 0;
 }

 void FindController::didMoveToWebPage(PageOverlay*, WebPage*)
 {
 }

 static const float shadowOffsetX = 0.0;
 static const float shadowOffsetY = 1.0;
 static const float shadowBlurRadius = 2.0;
 static const float whiteFrameThickness = 1.0;

 static const float overlayBackgroundRed = 0.1;
 static const float overlayBackgroundGreen = 0.1;
 static const float overlayBackgroundBlue = 0.1;
 static const float overlayBackgroundAlpha = 0.25;

 static Color overlayBackgroundColor(float fractionFadedIn)
 {
     return Color(overlayBackgroundRed, overlayBackgroundGreen, overlayBackgroundBlue, overlayBackgroundAlpha * fractionFadedIn);
 }

 static Color holeShadowColor(float fractionFadedIn)
 {
     return Color(0.0f, 0.0f, 0.0f, fractionFadedIn);
 }

 static Color holeFillColor(float fractionFadedIn)
 {
     return Color(1.0f, 1.0f, 1.0f, fractionFadedIn);
 }

 void FindController::drawRect(PageOverlay* pageOverlay, GraphicsContext& graphicsContext, const IntRect& dirtyRect)
 {
     float fractionFadedIn = pageOverlay->fractionFadedIn();

     Vector<IntRect> rects = rectsForTextMatches();

     // Draw the background.
     graphicsContext.fillRect(dirtyRect, overlayBackgroundColor(fractionFadedIn), ColorSpaceSRGB);

     {
         GraphicsContextStateSaver stateSaver(graphicsContext);

         graphicsContext.setShadow(FloatSize(shadowOffsetX, shadowOffsetY), shadowBlurRadius, holeShadowColor(fractionFadedIn), ColorSpaceSRGB);
         graphicsContext.setFillColor(holeFillColor(fractionFadedIn), ColorSpaceSRGB);

         // Draw white frames around the holes.
         for (size_t i = 0; i < rects.size(); ++i) {
             IntRect whiteFrameRect = rects[i];
             whiteFrameRect.inflate(1);

             graphicsContext.fillRect(whiteFrameRect);
         }
     }

     graphicsContext.setFillColor(Color::transparent, ColorSpaceSRGB);

     // Clear out the holes.
     for (size_t i = 0; i < rects.size(); ++i)
         graphicsContext.fillRect(rects[i]);

     if (!m_isShowingFindIndicator)
         return;

     if (Frame* selectedFrame = frameWithSelection(m_webPage->corePage())) {
         IntRect findIndicatorRect = selectedFrame->view()->contentsToWindow(enclosingIntRect(selectedFrame->selection()->bounds()));

         if (findIndicatorRect != m_findIndicatorRect)
             hideFindIndicator();
     }
 }

 bool FindController::mouseEvent(PageOverlay*, const WebMouseEvent& mouseEvent)
 {
     // If we get a mouse down event inside the page overlay we should hide the find UI.
     if (mouseEvent.type() == WebEvent::MouseDown) {
         // Dismiss the overlay.
         hideFindUI();
     }

     return false;
 }

 } // namespace WebKit
	/*
	* Copyright (C) 2010 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 "FindController.h"

	#include "ShareableBitmap.h"
	#include "WKPage.h"
	#include "WebCoreArgumentCoders.h"
	#include "WebPage.h"
	#include "WebPageProxyMessages.h"
	#include "WebProcess.h"
	#include <WebCore/DocumentMarkerController.h>
	#include <WebCore/FloatQuad.h>
	#include <WebCore/FocusController.h>
	#include <WebCore/Frame.h>
	#include <WebCore/FrameView.h>
	#include <WebCore/GraphicsContext.h>
	#include <WebCore/Page.h>

	using namespace std;
	using namespace WebCore;

	namespace WebKit {

	static WebCore::FindOptions core(FindOptions options)
	{
	return (options & FindOptionsCaseInsensitive ? CaseInsensitive : 0)
	\| (options & FindOptionsAtWordStarts ? AtWordStarts : 0)
	\| (options & FindOptionsTreatMedialCapitalAsWordStart ? TreatMedialCapitalAsWordStart : 0)
	\| (options & FindOptionsBackwards ? Backwards : 0)
	\| (options & FindOptionsWrapAround ? WrapAround : 0);
	}

	FindController::FindController(WebPage* webPage)
	: m_webPage(webPage)
	, m_findPageOverlay(0)
	, m_isShowingFindIndicator(false)
	{
	}

	FindController::~FindController()
	{
	}

	void FindController::countStringMatches(const String& string, FindOptions options, unsigned maxMatchCount)
	{
	if (maxMatchCount == numeric_limits<unsigned>::max())
	--maxMatchCount;

	unsigned matchCount = m_webPage->corePage()->markAllMatchesForText(string, core(options), false, maxMatchCount + 1);
	m_webPage->corePage()->unmarkAllTextMatches();

	// Check if we have more matches than allowed.
	if (matchCount > maxMatchCount)
	matchCount = static_cast<unsigned>(kWKMoreThanMaximumMatchCount);

	m_webPage->send(Messages::WebPageProxy::DidCountStringMatches(string, matchCount));
	}

	static Frame* frameWithSelection(Page* page)
	{
	for (Frame* frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
	if (frame->selection()->isRange())
	return frame;
	}

	return 0;
	}

	void FindController::updateFindUIAfterPageScroll(bool found, const String& string, FindOptions options, unsigned maxMatchCount)
	{
	Frame* selectedFrame = frameWithSelection(m_webPage->corePage());

	bool shouldShowOverlay = false;

	if (!found) {
	m_webPage->corePage()->unmarkAllTextMatches();

	// Clear the selection.
	if (selectedFrame)
	selectedFrame->selection()->clear();

	hideFindIndicator();

	m_webPage->send(Messages::WebPageProxy::DidFailToFindString(string));
	} else {
	shouldShowOverlay = options & FindOptionsShowOverlay;
	bool shouldShowHighlight = options & FindOptionsShowHighlight;
	unsigned matchCount = 1;

	if (shouldShowOverlay \|\| shouldShowHighlight) {

	if (maxMatchCount == numeric_limits<unsigned>::max())
	--maxMatchCount;

	m_webPage->corePage()->unmarkAllTextMatches();
	matchCount = m_webPage->corePage()->markAllMatchesForText(string, core(options), shouldShowHighlight, maxMatchCount + 1);

	// Check if we have more matches than allowed.
	if (matchCount > maxMatchCount) {
	shouldShowOverlay = false;
	matchCount = static_cast<unsigned>(kWKMoreThanMaximumMatchCount);
	}
	}

	m_webPage->send(Messages::WebPageProxy::DidFindString(string, matchCount));

	if (!(options & FindOptionsShowFindIndicator) \|\| !updateFindIndicator(selectedFrame, shouldShowOverlay)) {
	// Either we shouldn't show the find indicator, or we couldn't update it.
	hideFindIndicator();
	}
	}

	if (!shouldShowOverlay) {
	if (m_findPageOverlay) {
	// Get rid of the overlay.
	m_webPage->uninstallPageOverlay(m_findPageOverlay, false);
	}

	ASSERT(!m_findPageOverlay);
	} else {
	if (!m_findPageOverlay) {
	RefPtr<PageOverlay> findPageOverlay = PageOverlay::create(this);
	m_findPageOverlay = findPageOverlay.get();
	m_webPage->installPageOverlay(findPageOverlay.release());
	} else {
	// The page overlay needs to be repainted.
	m_findPageOverlay->setNeedsDisplay();
	}
	}
	}

	void FindController::findString(const String& string, FindOptions options, unsigned maxMatchCount)
	{
	bool found = m_webPage->corePage()->findString(string, core(options));

	m_webPage->drawingArea()->dispatchAfterEnsuringUpdatedScrollPosition(WTF::bind(&FindController::updateFindUIAfterPageScroll, this, found, string, options, maxMatchCount));
	}

	void FindController::hideFindUI()
	{
	if (m_findPageOverlay)
	m_webPage->uninstallPageOverlay(m_findPageOverlay, false);

	m_webPage->corePage()->unmarkAllTextMatches();
	hideFindIndicator();
	}

	bool FindController::updateFindIndicator(Frame* selectedFrame, bool isShowingOverlay, bool shouldAnimate)
	{
	if (!selectedFrame)
	return false;

	IntRect selectionRect = enclosingIntRect(selectedFrame->selection()->bounds());

	// Selection rect can be empty for matches that are currently obscured from view.
	if (selectionRect.isEmpty())
	return false;

	// We want the selection rect in window coordinates.
	IntRect selectionRectInWindowCoordinates = selectedFrame->view()->contentsToWindow(selectionRect);

	Vector<FloatRect> textRects;
	selectedFrame->selection()->getClippedVisibleTextRectangles(textRects);

	IntSize backingStoreSize = selectionRect.size();
	backingStoreSize.scale(m_webPage->corePage()->deviceScaleFactor());

	// Create a backing store and paint the find indicator text into it.
	RefPtr<ShareableBitmap> findIndicatorTextBackingStore = ShareableBitmap::createShareable(backingStoreSize, ShareableBitmap::SupportsAlpha);
	if (!findIndicatorTextBackingStore)
	return false;

	OwnPtr<GraphicsContext> graphicsContext = findIndicatorTextBackingStore->createGraphicsContext();
	graphicsContext->scale(FloatSize(m_webPage->corePage()->deviceScaleFactor(), m_webPage->corePage()->deviceScaleFactor()));

	IntRect paintRect = selectionRect;
	paintRect.move(selectedFrame->view()->frameRect().x(), selectedFrame->view()->frameRect().y());
	paintRect.move(-selectedFrame->view()->scrollOffset());

	graphicsContext->translate(-paintRect.x(), -paintRect.y());
	selectedFrame->view()->setPaintBehavior(PaintBehaviorSelectionOnly \| PaintBehaviorForceBlackText \| PaintBehaviorFlattenCompositingLayers);
	selectedFrame->document()->updateLayout();

	selectedFrame->view()->paint(graphicsContext.get(), paintRect);
	selectedFrame->view()->setPaintBehavior(PaintBehaviorNormal);

	ShareableBitmap::Handle handle;
	if (!findIndicatorTextBackingStore->createHandle(handle))
	return false;

	// We want the text rects in selection rect coordinates.
	Vector<FloatRect> textRectsInSelectionRectCoordinates;

	for (size_t i = 0; i < textRects.size(); ++i) {
	IntRect textRectInSelectionRectCoordinates = selectedFrame->view()->contentsToWindow(enclosingIntRect(textRects[i]));
	textRectInSelectionRectCoordinates.move(-selectionRectInWindowCoordinates.x(), -selectionRectInWindowCoordinates.y());

	textRectsInSelectionRectCoordinates.append(textRectInSelectionRectCoordinates);
	}

	m_webPage->send(Messages::WebPageProxy::SetFindIndicator(selectionRectInWindowCoordinates, textRectsInSelectionRectCoordinates, m_webPage->corePage()->deviceScaleFactor(), handle, !isShowingOverlay, shouldAnimate));
	m_findIndicatorRect = selectionRectInWindowCoordinates;
	m_isShowingFindIndicator = true;

	return true;
	}

	void FindController::hideFindIndicator()
	{
	if (!m_isShowingFindIndicator)
	return;

	ShareableBitmap::Handle handle;
	m_webPage->send(Messages::WebPageProxy::SetFindIndicator(FloatRect(), Vector<FloatRect>(), m_webPage->corePage()->deviceScaleFactor(), handle, false, true));
	m_isShowingFindIndicator = false;
	}

	void FindController::showFindIndicatorInSelection()
	{
	Frame* selectedFrame = m_webPage->corePage()->focusController()->focusedOrMainFrame();
	if (!selectedFrame)
	return;

	updateFindIndicator(selectedFrame, false);
	}

	void FindController::deviceScaleFactorDidChange()
	{
	ASSERT(isShowingOverlay());

	Frame* selectedFrame = frameWithSelection(m_webPage->corePage());
	if (!selectedFrame)
	return;

	updateFindIndicator(selectedFrame, true, false);
	}

	Vector<IntRect> FindController::rectsForTextMatches()
	{
	Vector<IntRect> rects;

	for (Frame* frame = m_webPage->corePage()->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
	Document* document = frame->document();
	if (!document)
	continue;

	IntRect visibleRect = frame->view()->visibleContentRect();
	Vector<IntRect> frameRects = document->markers()->renderedRectsForMarkers(DocumentMarker::TextMatch);
	IntPoint frameOffset(-frame->view()->scrollOffset().width(), -frame->view()->scrollOffset().height());
	frameOffset = frame->view()->convertToContainingWindow(frameOffset);

	for (Vector<IntRect>::iterator it = frameRects.begin(), end = frameRects.end(); it != end; ++it) {
	it->intersect(visibleRect);
	it->move(frameOffset.x(), frameOffset.y());
	rects.append(*it);
	}
	}

	return rects;
	}

	void FindController::pageOverlayDestroyed(PageOverlay*)
	{
	}

	void FindController::willMoveToWebPage(PageOverlay, WebPage webPage)
	{
	if (webPage)
	return;

	// The page overlay is moving away from the web page, reset it.
	ASSERT(m_findPageOverlay);
	m_findPageOverlay = 0;
	}

	void FindController::didMoveToWebPage(PageOverlay, WebPage)
	{
	}

	static const float shadowOffsetX = 0.0;
	static const float shadowOffsetY = 1.0;
	static const float shadowBlurRadius = 2.0;
	static const float whiteFrameThickness = 1.0;

	static const float overlayBackgroundRed = 0.1;
	static const float overlayBackgroundGreen = 0.1;
	static const float overlayBackgroundBlue = 0.1;
	static const float overlayBackgroundAlpha = 0.25;

	static Color overlayBackgroundColor(float fractionFadedIn)
	{
	return Color(overlayBackgroundRed, overlayBackgroundGreen, overlayBackgroundBlue, overlayBackgroundAlpha * fractionFadedIn);
	}

	static Color holeShadowColor(float fractionFadedIn)
	{
	return Color(0.0f, 0.0f, 0.0f, fractionFadedIn);
	}

	static Color holeFillColor(float fractionFadedIn)
	{
	return Color(1.0f, 1.0f, 1.0f, fractionFadedIn);
	}

	void FindController::drawRect(PageOverlay* pageOverlay, GraphicsContext& graphicsContext, const IntRect& dirtyRect)
	{
	float fractionFadedIn = pageOverlay->fractionFadedIn();

	Vector<IntRect> rects = rectsForTextMatches();

	// Draw the background.
	graphicsContext.fillRect(dirtyRect, overlayBackgroundColor(fractionFadedIn), ColorSpaceSRGB);

	{
	GraphicsContextStateSaver stateSaver(graphicsContext);

	graphicsContext.setShadow(FloatSize(shadowOffsetX, shadowOffsetY), shadowBlurRadius, holeShadowColor(fractionFadedIn), ColorSpaceSRGB);
	graphicsContext.setFillColor(holeFillColor(fractionFadedIn), ColorSpaceSRGB);

	// Draw white frames around the holes.
	for (size_t i = 0; i < rects.size(); ++i) {
	IntRect whiteFrameRect = rects[i];
	whiteFrameRect.inflate(1);

	graphicsContext.fillRect(whiteFrameRect);
	}
	}

	graphicsContext.setFillColor(Color::transparent, ColorSpaceSRGB);

	// Clear out the holes.
	for (size_t i = 0; i < rects.size(); ++i)
	graphicsContext.fillRect(rects[i]);

	if (!m_isShowingFindIndicator)
	return;

	if (Frame* selectedFrame = frameWithSelection(m_webPage->corePage())) {
	IntRect findIndicatorRect = selectedFrame->view()->contentsToWindow(enclosingIntRect(selectedFrame->selection()->bounds()));

	if (findIndicatorRect != m_findIndicatorRect)
	hideFindIndicator();
	}
	}

	bool FindController::mouseEvent(PageOverlay*, const WebMouseEvent& mouseEvent)
	{
	// If we get a mouse down event inside the page overlay we should hide the find UI.
	if (mouseEvent.type() == WebEvent::MouseDown) {
	// Dismiss the overlay.
	hideFindUI();
	}

	return false;
	}

	} // namespace WebKit