--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/loader/ImageDocument.cpp Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,406 @@
+/*
+ * 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 "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:
+ ImageDocumentParser(ImageDocument* document)
+ : RawDataDocumentParser(document)
+ {
+ }
+
+ ImageDocument* document() const
+ {
+ return static_cast<ImageDocument*>(m_document);
+ }
+
+private:
+ 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(Document* document)
+{
+ FrameView* view = document->view();
+ return view ? view->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 (!m_parserStopped && 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());
+
+ IntSize size = cachedImage->imageSize(pageZoomFactor(document()));
+ 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())
+{
+ setParseMode(Compat);
+}
+
+DocumentParser* ImageDocument::createParser()
+{
+ return new ImageDocumentParser(this);
+}
+
+void ImageDocument::createDocumentStructure()
+{
+ ExceptionCode ec;
+
+ RefPtr<Element> rootElement = Document::createElement(htmlTag, false);
+ appendChild(rootElement, ec);
+
+ 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(view->pageZoomFactor());
+ 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();
+
+ IntSize imageSize = m_imageElement->cachedImage()->imageSize(view->pageZoomFactor());
+ 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) {
+ 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();
+}
+
+}