1 files changed, 298 insertions, 0 deletions
diff --git a/Source/WebCore/svg/graphics/SVGImage.cpp b/Source/WebCore/svg/graphics/SVGImage.cpp
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+++ b/Source/WebCore/svg/graphics/SVGImage.cpp
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+/*
+ * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
+ * Copyright (C) 2008, 2009 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. ``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
+ * 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"
+#if ENABLE(SVG)
+#include "SVGImage.h"
+
+#include "CachedPage.h"
+#include "DocumentLoader.h"
+#include "FileChooser.h"
+#include "FloatRect.h"
+#include "Frame.h"
+#include "FrameLoader.h"
+#include "FrameView.h"
+#include "GraphicsContext.h"
+#include "HTMLFormElement.h"
+#include "ImageBuffer.h"
+#include "ImageObserver.h"
+#include "Page.h"
+#include "RenderView.h"
+#include "ResourceError.h"
+#include "SVGDocument.h"
+#include "SVGLength.h"
+#include "SVGRenderSupport.h"
+#include "SVGSVGElement.h"
+#include "Settings.h"
+
+// Moving this #include above FrameLoader.h causes the Windows build to fail due to warnings about
+// alignment in Timer<FrameLoader>. It seems that the definition of EmptyFrameLoaderClient is what
+// causes this (removing that definition fixes the warnings), but it isn't clear why.
+#include "EmptyClients.h" // NOLINT
+
+namespace WebCore {
+
+class SVGImageChromeClient : public EmptyChromeClient, public Noncopyable {
+public:
+    SVGImageChromeClient(SVGImage* image)
+        : m_image(image)
+    {
+    }
+
+    SVGImage* image() const { return m_image; }
+    
+private:
+    virtual void chromeDestroyed()
+    {
+        m_image = 0;
+    }
+
+    virtual void invalidateContentsAndWindow(const IntRect& r, bool)
+    {
+        if (m_image && m_image->imageObserver())
+            m_image->imageObserver()->changedInRect(m_image, r);
+    }
+
+    SVGImage* m_image;
+};
+
+SVGImage::SVGImage(ImageObserver* observer)
+    : Image(observer)
+{
+}
+
+SVGImage::~SVGImage()
+{
+    if (m_page) {
+        m_page->mainFrame()->loader()->frameDetached(); // Break both the loader and view references to the frame
+
+        // Clear explicitly because we want to delete the page before the ChromeClient.
+        // FIXME: I believe that's already guaranteed by C++ object destruction rules,
+        // so this may matter only for the assertion below.
+        m_page.clear();
+    }
+
+    // Verify that page teardown destroyed the Chrome
+    ASSERT(!m_chromeClient || !m_chromeClient->image());
+}
+
+void SVGImage::setContainerSize(const IntSize& containerSize)
+{
+    if (containerSize.isEmpty())
+        return;
+
+    if (!m_page)
+        return;
+    Frame* frame = m_page->mainFrame();
+    SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
+    if (!rootElement)
+        return;
+
+    rootElement->setContainerSize(containerSize);
+}
+
+bool SVGImage::usesContainerSize() const
+{
+    if (!m_page)
+        return false;
+    Frame* frame = m_page->mainFrame();
+    SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
+    if (!rootElement)
+        return false;
+
+    return rootElement->hasSetContainerSize();
+}
+
+IntSize SVGImage::size() const
+{
+    if (!m_page)
+        return IntSize();
+    Frame* frame = m_page->mainFrame();
+    SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
+    if (!rootElement)
+        return IntSize();
+    
+    SVGLength width = rootElement->width();
+    SVGLength height = rootElement->height();
+    
+    IntSize svgSize;
+    if (width.unitType() == LengthTypePercentage) 
+        svgSize.setWidth(rootElement->relativeWidthValue());
+    else
+        svgSize.setWidth(static_cast<int>(width.value(rootElement)));
+
+    if (height.unitType() == LengthTypePercentage) 
+        svgSize.setHeight(rootElement->relativeHeightValue());
+    else
+        svgSize.setHeight(static_cast<int>(height.value(rootElement)));
+
+    return svgSize;
+}
+
+bool SVGImage::hasRelativeWidth() const
+{
+    if (!m_page)
+        return false;
+    SVGSVGElement* rootElement = static_cast<SVGDocument*>(m_page->mainFrame()->document())->rootElement();
+    if (!rootElement)
+        return false;
+
+    return rootElement->width().unitType() == LengthTypePercentage;
+}
+
+bool SVGImage::hasRelativeHeight() const
+{
+    if (!m_page)
+        return false;
+    SVGSVGElement* rootElement = static_cast<SVGDocument*>(m_page->mainFrame()->document())->rootElement();
+    if (!rootElement)
+        return false;
+
+    return rootElement->height().unitType() == LengthTypePercentage;
+}
+
+void SVGImage::draw(GraphicsContext* context, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace, CompositeOperator compositeOp)
+{
+    if (!m_page)
+        return;
+
+    FrameView* view = m_page->mainFrame()->view();
+
+    context->save();
+    context->setCompositeOperation(compositeOp);
+    context->clip(enclosingIntRect(dstRect));
+    if (compositeOp != CompositeSourceOver)
+        context->beginTransparencyLayer(1);
+
+    FloatSize scale(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height());
+    
+    // We can only draw the entire frame, clipped to the rect we want. So compute where the top left
+    // of the image would be if we were drawing without clipping, and translate accordingly.
+    FloatSize topLeftOffset(srcRect.location().x() * scale.width(), srcRect.location().y() * scale.height());
+    FloatPoint destOffset = dstRect.location() - topLeftOffset;
+
+    context->translate(destOffset.x(), destOffset.y());
+    context->scale(scale);
+
+    view->resize(size());
+
+    if (view->needsLayout())
+        view->layout();
+
+    view->paint(context, IntRect(0, 0, view->width(), view->height()));
+
+    if (compositeOp != CompositeSourceOver)
+        context->endTransparencyLayer();
+
+    context->restore();
+
+    if (imageObserver())
+        imageObserver()->didDraw(this);
+}
+
+NativeImagePtr SVGImage::nativeImageForCurrentFrame()
+{
+    // FIXME: In order to support dynamic SVGs we need to have a way to invalidate this
+    // frame cache, or better yet, not use a cache for tiled drawing at all, instead
+    // having a tiled drawing callback (hopefully non-virtual).
+    if (!m_frameCache) {
+        if (!m_page)
+            return 0;
+        OwnPtr<ImageBuffer> buffer = ImageBuffer::create(size());
+        if (!buffer) // failed to allocate image
+            return 0;
+        draw(buffer->context(), rect(), rect(), ColorSpaceDeviceRGB, CompositeSourceOver);
+        m_frameCache = buffer->copyImage();
+    }
+    return m_frameCache->nativeImageForCurrentFrame();
+}
+
+bool SVGImage::dataChanged(bool allDataReceived)
+{
+    // Don't do anything if is an empty image.
+    if (!data()->size())
+        return true;
+
+    if (allDataReceived) {
+        static FrameLoaderClient* dummyFrameLoaderClient =  new EmptyFrameLoaderClient;
+
+        Page::PageClients pageClients;
+        m_chromeClient = adoptPtr(new SVGImageChromeClient(this));
+        pageClients.chromeClient = m_chromeClient.get();
+#if ENABLE(CONTEXT_MENUS)
+        static ContextMenuClient* dummyContextMenuClient = new EmptyContextMenuClient;
+        pageClients.contextMenuClient = dummyContextMenuClient;
+#endif
+        static EditorClient* dummyEditorClient = new EmptyEditorClient;
+        pageClients.editorClient = dummyEditorClient;
+#if ENABLE(DRAG_SUPPORT)
+        static DragClient* dummyDragClient = new EmptyDragClient;
+        pageClients.dragClient = dummyDragClient;
+#endif
+        static InspectorClient* dummyInspectorClient = new EmptyInspectorClient;
+        pageClients.inspectorClient = dummyInspectorClient;
+#if ENABLE(DEVICE_ORIENTATION)
+        static DeviceMotionClient* dummyDeviceMotionClient = new EmptyDeviceMotionClient;
+        pageClients.deviceMotionClient = dummyDeviceMotionClient;
+        static DeviceOrientationClient* dummyDeviceOrientationClient = new EmptyDeviceOrientationClient;
+        pageClients.deviceOrientationClient = dummyDeviceOrientationClient;
+#endif
+
+        // FIXME: If this SVG ends up loading itself, we might leak the world.
+        // The comment said that the Cache code does not know about CachedImages
+        // holding Frames and won't know to break the cycle. But 
+        m_page.set(new Page(pageClients));
+        m_page->settings()->setMediaEnabled(false);
+        m_page->settings()->setJavaScriptEnabled(false);
+        m_page->settings()->setPluginsEnabled(false);
+
+        RefPtr<Frame> frame = Frame::create(m_page.get(), 0, dummyFrameLoaderClient);
+        frame->setView(FrameView::create(frame.get()));
+        frame->init();
+        ResourceRequest fakeRequest(KURL(ParsedURLString, ""));
+        FrameLoader* loader = frame->loader();
+        loader->setForcedSandboxFlags(SandboxAll);
+        loader->load(fakeRequest, false); // Make sure the DocumentLoader is created
+        loader->policyChecker()->cancelCheck(); // cancel any policy checks
+        loader->commitProvisionalLoad();
+        loader->writer()->setMIMEType("image/svg+xml");
+        loader->writer()->begin(KURL()); // create the empty document
+        loader->writer()->addData(data()->data(), data()->size());
+        loader->writer()->end();
+        frame->view()->setTransparent(true); // SVG Images are transparent.
+    }
+
+    return m_page;
+}
+
+String SVGImage::filenameExtension() const
+{
+    return "svg";
+}
+
+}
+
+#endif // ENABLE(SVG)