Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 420 insertions, 0 deletions

diff --git a/Source/WebCore/html/ImageDocument.cpp b/Source/WebCore/html/ImageDocument.cpp
new file mode 100644
index 0000000..a42ccc8
--- /dev/null
+++ b/Source/WebCore/html/ImageDocument.cpp
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+/*
+ * Copyright (C) 2006, 2007, 2008, 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 COMPUTER, INC. ``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 COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * 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 "ImageDocument.h"
+
+#include "CachedImage.h"
+#include "DocumentLoader.h"
+#include "EventListener.h"
+#include "EventNames.h"
+#include "Frame.h"
+#include "FrameLoaderClient.h"
+#include "FrameView.h"
+#include "HTMLHtmlElement.h"
+#include "HTMLImageElement.h"
+#include "HTMLNames.h"
+#include "LocalizedStrings.h"
+#include "MouseEvent.h"
+#include "NotImplemented.h"
+#include "Page.h"
+#include "RawDataDocumentParser.h"
+#include "Settings.h"
+
+using std::min;
+
+namespace WebCore {
+
+using namespace HTMLNames;
+
+class ImageEventListener : public EventListener {
+public:
+    static PassRefPtr<ImageEventListener> create(ImageDocument* document) { return adoptRef(new ImageEventListener(document)); }
+    static const ImageEventListener* cast(const EventListener* listener)
+    {
+        return listener->type() == ImageEventListenerType
+            ? static_cast<const ImageEventListener*>(listener)
+            : 0;
+    }
+
+    virtual bool operator==(const EventListener& other);
+
+private:
+    ImageEventListener(ImageDocument* document)
+        : EventListener(ImageEventListenerType)
+        , m_doc(document)
+    {
+    }
+
+    virtual void handleEvent(ScriptExecutionContext*, Event*);
+
+    ImageDocument* m_doc;
+};
+    
+class ImageDocumentParser : public RawDataDocumentParser {
+public:
+    static PassRefPtr<ImageDocumentParser> create(ImageDocument* document)
+    {
+        return adoptRef(new ImageDocumentParser(document));
+    }
+
+    ImageDocument* document() const
+    {
+        return static_cast<ImageDocument*>(RawDataDocumentParser::document());
+    }
+    
+private:
+    ImageDocumentParser(ImageDocument* document)
+        : RawDataDocumentParser(document)
+    {
+    }
+
+    virtual void appendBytes(DocumentWriter*, const char*, int, bool);
+    virtual void finish();
+};
+
+class ImageDocumentElement : public HTMLImageElement {
+public:
+    static PassRefPtr<ImageDocumentElement> create(ImageDocument*);
+
+private:
+    ImageDocumentElement(ImageDocument* document)
+        : HTMLImageElement(imgTag, document)
+        , m_imageDocument(document)
+    {
+    }
+
+    virtual ~ImageDocumentElement();
+    virtual void willMoveToNewOwnerDocument();
+
+    ImageDocument* m_imageDocument;
+};
+
+inline PassRefPtr<ImageDocumentElement> ImageDocumentElement::create(ImageDocument* document)
+{
+    return adoptRef(new ImageDocumentElement(document));
+}
+
+// --------
+
+static float pageZoomFactor(const Document* document)
+{
+    Frame* frame = document->frame();
+    return frame ? frame->pageZoomFactor() : 1;
+}
+
+void ImageDocumentParser::appendBytes(DocumentWriter*, const char*, int, bool)
+{
+    Frame* frame = document()->frame();
+    Settings* settings = frame->settings();
+    if (!frame->loader()->client()->allowImages(!settings || settings->areImagesEnabled()))
+        return;
+
+    CachedImage* cachedImage = document()->cachedImage();
+    cachedImage->data(frame->loader()->documentLoader()->mainResourceData(), false);
+
+    document()->imageChanged();
+}
+
+void ImageDocumentParser::finish()
+{
+    if (!isStopped() && document()->imageElement()) {
+        CachedImage* cachedImage = document()->cachedImage();
+        RefPtr<SharedBuffer> data = document()->frame()->loader()->documentLoader()->mainResourceData();
+
+        // If this is a multipart image, make a copy of the current part, since the resource data
+        // will be overwritten by the next part.
+        if (document()->frame()->loader()->documentLoader()->isLoadingMultipartContent())
+            data = data->copy();
+
+        cachedImage->data(data.release(), true);
+        cachedImage->finish();
+
+        cachedImage->setResponse(document()->frame()->loader()->documentLoader()->response());
+
+        // Report the natural image size in the page title, regardless of zoom
+        // level.
+        IntSize size = cachedImage->imageSize(1.0f);
+        if (size.width()) {
+            // Compute the title, we use the decoded filename of the resource, falling
+            // back on the (decoded) hostname if there is no path.
+            String fileName = decodeURLEscapeSequences(document()->url().lastPathComponent());
+            if (fileName.isEmpty())
+                fileName = document()->url().host();
+            document()->setTitle(imageTitle(fileName, size));
+        }
+
+        document()->imageChanged();
+    }
+
+    document()->finishedParsing();
+}
+    
+// --------
+
+ImageDocument::ImageDocument(Frame* frame, const KURL& url)
+    : HTMLDocument(frame, url)
+    , m_imageElement(0)
+    , m_imageSizeIsKnown(false)
+    , m_didShrinkImage(false)
+    , m_shouldShrinkImage(shouldShrinkToFit())
+{
+    setCompatibilityMode(QuirksMode);
+    lockCompatibilityMode();
+}
+    
+PassRefPtr<DocumentParser> ImageDocument::createParser()
+{
+    return ImageDocumentParser::create(this);
+}
+
+void ImageDocument::createDocumentStructure()
+{
+    ExceptionCode ec;
+    
+    RefPtr<Element> rootElement = Document::createElement(htmlTag, false);
+    appendChild(rootElement, ec);
+#if ENABLE(OFFLINE_WEB_APPLICATIONS)
+    static_cast<HTMLHtmlElement*>(rootElement.get())->insertedByParser();
+#endif
+
+    if (frame() && frame()->loader())
+        frame()->loader()->dispatchDocumentElementAvailable();
+    
+    RefPtr<Element> body = Document::createElement(bodyTag, false);
+    body->setAttribute(styleAttr, "margin: 0px;");
+    
+    rootElement->appendChild(body, ec);
+    
+    RefPtr<ImageDocumentElement> imageElement = ImageDocumentElement::create(this);
+    
+    imageElement->setAttribute(styleAttr, "-webkit-user-select: none");        
+    imageElement->setLoadManually(true);
+    imageElement->setSrc(url().string());
+    
+    body->appendChild(imageElement, ec);
+    
+    if (shouldShrinkToFit()) {
+        // Add event listeners
+        RefPtr<EventListener> listener = ImageEventListener::create(this);
+        if (DOMWindow* domWindow = this->domWindow())
+            domWindow->addEventListener("resize", listener, false);
+        imageElement->addEventListener("click", listener.release(), false);
+    }
+
+    m_imageElement = imageElement.get();
+}
+
+float ImageDocument::scale() const
+{
+    if (!m_imageElement)
+        return 1.0f;
+
+    FrameView* view = frame()->view();
+    if (!view)
+        return 1;
+
+    IntSize imageSize = m_imageElement->cachedImage()->imageSize(pageZoomFactor(this));
+    IntSize windowSize = IntSize(view->width(), view->height());
+    
+    float widthScale = (float)windowSize.width() / imageSize.width();
+    float heightScale = (float)windowSize.height() / imageSize.height();
+
+    return min(widthScale, heightScale);
+}
+
+void ImageDocument::resizeImageToFit()
+{
+    if (!m_imageElement)
+        return;
+
+    IntSize imageSize = m_imageElement->cachedImage()->imageSize(pageZoomFactor(this));
+
+    float scale = this->scale();
+    m_imageElement->setWidth(static_cast<int>(imageSize.width() * scale));
+    m_imageElement->setHeight(static_cast<int>(imageSize.height() * scale));
+    
+    ExceptionCode ec;
+    m_imageElement->style()->setProperty("cursor", "-webkit-zoom-in", ec);
+}
+
+void ImageDocument::imageClicked(int x, int y)
+{
+    if (!m_imageSizeIsKnown || imageFitsInWindow())
+        return;
+
+    m_shouldShrinkImage = !m_shouldShrinkImage;
+    
+    if (m_shouldShrinkImage)
+        windowSizeChanged();
+    else {
+        restoreImageSize();
+        
+        updateLayout();
+        
+        float scale = this->scale();
+        
+        int scrollX = static_cast<int>(x / scale - (float)frame()->view()->width() / 2);
+        int scrollY = static_cast<int>(y / scale - (float)frame()->view()->height() / 2);
+        
+        frame()->view()->setScrollPosition(IntPoint(scrollX, scrollY));
+    }
+}
+
+void ImageDocument::imageChanged()
+{
+    ASSERT(m_imageElement);
+    
+    if (m_imageSizeIsKnown)
+        return;
+
+    if (m_imageElement->cachedImage()->imageSize(pageZoomFactor(this)).isEmpty())
+        return;
+    
+    m_imageSizeIsKnown = true;
+    
+    if (shouldShrinkToFit()) {
+        // Force resizing of the image
+        windowSizeChanged();
+    }
+}
+
+void ImageDocument::restoreImageSize()
+{
+    if (!m_imageElement || !m_imageSizeIsKnown)
+        return;
+    
+    m_imageElement->setWidth(m_imageElement->cachedImage()->imageSize(pageZoomFactor(this)).width());
+    m_imageElement->setHeight(m_imageElement->cachedImage()->imageSize(pageZoomFactor(this)).height());
+    
+    ExceptionCode ec;
+    if (imageFitsInWindow())
+        m_imageElement->style()->removeProperty("cursor", ec);
+    else
+        m_imageElement->style()->setProperty("cursor", "-webkit-zoom-out", ec);
+        
+    m_didShrinkImage = false;
+}
+
+bool ImageDocument::imageFitsInWindow() const
+{
+    if (!m_imageElement)
+        return true;
+
+    FrameView* view = frame()->view();
+    if (!view)
+        return true;
+
+    IntSize imageSize = m_imageElement->cachedImage()->imageSize(pageZoomFactor(this));
+    IntSize windowSize = IntSize(view->width(), view->height());
+    
+    return imageSize.width() <= windowSize.width() && imageSize.height() <= windowSize.height();    
+}
+
+void ImageDocument::windowSizeChanged()
+{
+    if (!m_imageElement || !m_imageSizeIsKnown)
+        return;
+
+    bool fitsInWindow = imageFitsInWindow();
+    
+    // If the image has been explicitly zoomed in, restore the cursor if the image fits
+    // and set it to a zoom out cursor if the image doesn't fit
+    if (!m_shouldShrinkImage) {
+        ExceptionCode ec;
+        
+        if (fitsInWindow)
+            m_imageElement->style()->removeProperty("cursor", ec);
+        else
+            m_imageElement->style()->setProperty("cursor", "-webkit-zoom-out", ec);
+        return;
+    }
+    
+    if (m_didShrinkImage) {
+        // If the window has been resized so that the image fits, restore the image size
+        // otherwise update the restored image size.
+        if (fitsInWindow)
+            restoreImageSize();
+        else
+            resizeImageToFit();
+    } else {
+        // If the image isn't resized but needs to be, then resize it.
+        if (!fitsInWindow) {
+            resizeImageToFit();
+            m_didShrinkImage = true;
+        }
+    }
+}
+
+CachedImage* ImageDocument::cachedImage()
+{ 
+    if (!m_imageElement)
+        createDocumentStructure();
+    
+    return m_imageElement->cachedImage();
+}
+
+bool ImageDocument::shouldShrinkToFit() const
+{
+    return frame()->page()->settings()->shrinksStandaloneImagesToFit() &&
+        frame()->page()->mainFrame() == frame();
+}
+
+// --------
+
+void ImageEventListener::handleEvent(ScriptExecutionContext*, Event* event)
+{
+    if (event->type() == eventNames().resizeEvent)
+        m_doc->windowSizeChanged();
+    else if (event->type() == eventNames().clickEvent && event->isMouseEvent()) {
+        MouseEvent* mouseEvent = static_cast<MouseEvent*>(event);
+        m_doc->imageClicked(mouseEvent->x(), mouseEvent->y());
+    }
+}
+
+bool ImageEventListener::operator==(const EventListener& listener)
+{
+    if (const ImageEventListener* imageEventListener = ImageEventListener::cast(&listener))
+        return m_doc == imageEventListener->m_doc;
+    return false;
+}
+
+// --------
+
+ImageDocumentElement::~ImageDocumentElement()
+{
+    if (m_imageDocument)
+        m_imageDocument->disconnectImageElement();
+}
+
+void ImageDocumentElement::willMoveToNewOwnerDocument()
+{
+    if (m_imageDocument) {
+        m_imageDocument->disconnectImageElement();
+        m_imageDocument = 0;
+    }
+    HTMLImageElement::willMoveToNewOwnerDocument();
+}
+
+}