1 /*
2 * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
3 * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #include "config.h"
28 #if ENABLE(SVG)
29 #include "SVGImage.h"
30
31 #include "CachedPage.h"
32 #include "DocumentLoader.h"
33 #include "FileChooser.h"
34 #include "FloatRect.h"
35 #include "Frame.h"
36 #include "FrameLoader.h"
37 #include "FrameView.h"
38 #include "GraphicsContext.h"
39 #include "HTMLFormElement.h"
40 #include "ImageBuffer.h"
41 #include "ImageObserver.h"
42 #include "Page.h"
43 #include "RenderView.h"
44 #include "ResourceError.h"
45 #include "SVGDocument.h"
46 #include "SVGLength.h"
47 #include "SVGRenderSupport.h"
48 #include "SVGSVGElement.h"
49 #include "Settings.h"
50
51 // Moving this #include above FrameLoader.h causes the Windows build to fail due to warnings about
52 // alignment in Timer<FrameLoader>. It seems that the definition of EmptyFrameLoaderClient is what
53 // causes this (removing that definition fixes the warnings), but it isn't clear why.
54 #include "EmptyClients.h" // NOLINT
55
56 namespace WebCore {
57
58 class SVGImageChromeClient : public EmptyChromeClient {
59 WTF_MAKE_NONCOPYABLE(SVGImageChromeClient); WTF_MAKE_FAST_ALLOCATED;
60 public:
SVGImageChromeClient(SVGImage * image)61 SVGImageChromeClient(SVGImage* image)
62 : m_image(image)
63 {
64 }
65
image() const66 SVGImage* image() const { return m_image; }
67
68 private:
chromeDestroyed()69 virtual void chromeDestroyed()
70 {
71 m_image = 0;
72 }
73
invalidateContentsAndWindow(const IntRect & r,bool)74 virtual void invalidateContentsAndWindow(const IntRect& r, bool)
75 {
76 if (m_image && m_image->imageObserver())
77 m_image->imageObserver()->changedInRect(m_image, r);
78 }
79
80 SVGImage* m_image;
81 };
82
SVGImage(ImageObserver * observer)83 SVGImage::SVGImage(ImageObserver* observer)
84 : Image(observer)
85 {
86 }
87
~SVGImage()88 SVGImage::~SVGImage()
89 {
90 if (m_page) {
91 m_page->mainFrame()->loader()->frameDetached(); // Break both the loader and view references to the frame
92
93 // Clear explicitly because we want to delete the page before the ChromeClient.
94 // FIXME: I believe that's already guaranteed by C++ object destruction rules,
95 // so this may matter only for the assertion below.
96 m_page.clear();
97 }
98
99 // Verify that page teardown destroyed the Chrome
100 ASSERT(!m_chromeClient || !m_chromeClient->image());
101 }
102
setContainerSize(const IntSize & containerSize)103 void SVGImage::setContainerSize(const IntSize& containerSize)
104 {
105 if (containerSize.isEmpty())
106 return;
107
108 if (!m_page)
109 return;
110 Frame* frame = m_page->mainFrame();
111 SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
112 if (!rootElement)
113 return;
114
115 rootElement->setContainerSize(containerSize);
116 }
117
usesContainerSize() const118 bool SVGImage::usesContainerSize() const
119 {
120 if (!m_page)
121 return false;
122 Frame* frame = m_page->mainFrame();
123 SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
124 if (!rootElement)
125 return false;
126
127 return rootElement->hasSetContainerSize();
128 }
129
size() const130 IntSize SVGImage::size() const
131 {
132 if (!m_page)
133 return IntSize();
134 Frame* frame = m_page->mainFrame();
135 SVGSVGElement* rootElement = static_cast<SVGDocument*>(frame->document())->rootElement();
136 if (!rootElement)
137 return IntSize();
138
139 SVGLength width = rootElement->width();
140 SVGLength height = rootElement->height();
141
142 IntSize svgSize;
143 if (width.unitType() == LengthTypePercentage)
144 svgSize.setWidth(rootElement->relativeWidthValue());
145 else
146 svgSize.setWidth(static_cast<int>(width.value(rootElement)));
147
148 if (height.unitType() == LengthTypePercentage)
149 svgSize.setHeight(rootElement->relativeHeightValue());
150 else
151 svgSize.setHeight(static_cast<int>(height.value(rootElement)));
152
153 return svgSize;
154 }
155
hasRelativeWidth() const156 bool SVGImage::hasRelativeWidth() const
157 {
158 if (!m_page)
159 return false;
160 SVGSVGElement* rootElement = static_cast<SVGDocument*>(m_page->mainFrame()->document())->rootElement();
161 if (!rootElement)
162 return false;
163
164 return rootElement->width().unitType() == LengthTypePercentage;
165 }
166
hasRelativeHeight() const167 bool SVGImage::hasRelativeHeight() const
168 {
169 if (!m_page)
170 return false;
171 SVGSVGElement* rootElement = static_cast<SVGDocument*>(m_page->mainFrame()->document())->rootElement();
172 if (!rootElement)
173 return false;
174
175 return rootElement->height().unitType() == LengthTypePercentage;
176 }
177
draw(GraphicsContext * context,const FloatRect & dstRect,const FloatRect & srcRect,ColorSpace,CompositeOperator compositeOp)178 void SVGImage::draw(GraphicsContext* context, const FloatRect& dstRect, const FloatRect& srcRect, ColorSpace, CompositeOperator compositeOp)
179 {
180 if (!m_page)
181 return;
182
183 FrameView* view = m_page->mainFrame()->view();
184
185 context->save();
186 context->setCompositeOperation(compositeOp);
187 context->clip(enclosingIntRect(dstRect));
188 if (compositeOp != CompositeSourceOver)
189 context->beginTransparencyLayer(1);
190
191 FloatSize scale(dstRect.width() / srcRect.width(), dstRect.height() / srcRect.height());
192
193 // We can only draw the entire frame, clipped to the rect we want. So compute where the top left
194 // of the image would be if we were drawing without clipping, and translate accordingly.
195 FloatSize topLeftOffset(srcRect.location().x() * scale.width(), srcRect.location().y() * scale.height());
196 FloatPoint destOffset = dstRect.location() - topLeftOffset;
197
198 context->translate(destOffset.x(), destOffset.y());
199 context->scale(scale);
200
201 view->resize(size());
202
203 if (view->needsLayout())
204 view->layout();
205
206 view->paint(context, IntRect(0, 0, view->width(), view->height()));
207
208 if (compositeOp != CompositeSourceOver)
209 context->endTransparencyLayer();
210
211 context->restore();
212
213 if (imageObserver())
214 imageObserver()->didDraw(this);
215 }
216
nativeImageForCurrentFrame()217 NativeImagePtr SVGImage::nativeImageForCurrentFrame()
218 {
219 // FIXME: In order to support dynamic SVGs we need to have a way to invalidate this
220 // frame cache, or better yet, not use a cache for tiled drawing at all, instead
221 // having a tiled drawing callback (hopefully non-virtual).
222 if (!m_frameCache) {
223 if (!m_page)
224 return 0;
225 OwnPtr<ImageBuffer> buffer = ImageBuffer::create(size());
226 if (!buffer) // failed to allocate image
227 return 0;
228 draw(buffer->context(), rect(), rect(), ColorSpaceDeviceRGB, CompositeSourceOver);
229 m_frameCache = buffer->copyImage();
230 }
231 return m_frameCache->nativeImageForCurrentFrame();
232 }
233
dataChanged(bool allDataReceived)234 bool SVGImage::dataChanged(bool allDataReceived)
235 {
236 // Don't do anything if is an empty image.
237 if (!data()->size())
238 return true;
239
240 if (allDataReceived) {
241 static FrameLoaderClient* dummyFrameLoaderClient = new EmptyFrameLoaderClient;
242
243 Page::PageClients pageClients;
244 m_chromeClient = adoptPtr(new SVGImageChromeClient(this));
245 pageClients.chromeClient = m_chromeClient.get();
246 #if ENABLE(CONTEXT_MENUS)
247 static ContextMenuClient* dummyContextMenuClient = new EmptyContextMenuClient;
248 pageClients.contextMenuClient = dummyContextMenuClient;
249 #endif
250 static EditorClient* dummyEditorClient = new EmptyEditorClient;
251 pageClients.editorClient = dummyEditorClient;
252 #if ENABLE(DRAG_SUPPORT)
253 static DragClient* dummyDragClient = new EmptyDragClient;
254 pageClients.dragClient = dummyDragClient;
255 #endif
256 static InspectorClient* dummyInspectorClient = new EmptyInspectorClient;
257 pageClients.inspectorClient = dummyInspectorClient;
258 #if ENABLE(DEVICE_ORIENTATION)
259 static DeviceMotionClient* dummyDeviceMotionClient = new EmptyDeviceMotionClient;
260 pageClients.deviceMotionClient = dummyDeviceMotionClient;
261 static DeviceOrientationClient* dummyDeviceOrientationClient = new EmptyDeviceOrientationClient;
262 pageClients.deviceOrientationClient = dummyDeviceOrientationClient;
263 #endif
264
265 // FIXME: If this SVG ends up loading itself, we might leak the world.
266 // The Cache code does not know about CachedImages holding Frames and
267 // won't know to break the cycle.
268 // This will become an issue when SVGImage will be able to load other
269 // SVGImage objects, but we're safe now, because SVGImage can only be
270 // loaded by a top-level document.
271 m_page.set(new Page(pageClients));
272 m_page->settings()->setMediaEnabled(false);
273 m_page->settings()->setJavaScriptEnabled(false);
274 m_page->settings()->setPluginsEnabled(false);
275
276 RefPtr<Frame> frame = Frame::create(m_page.get(), 0, dummyFrameLoaderClient);
277 frame->setView(FrameView::create(frame.get()));
278 frame->init();
279 FrameLoader* loader = frame->loader();
280 loader->setForcedSandboxFlags(SandboxAll);
281 ASSERT(loader->activeDocumentLoader()); // DocumentLoader should have been created by frame->init().
282 loader->activeDocumentLoader()->writer()->setMIMEType("image/svg+xml");
283 loader->activeDocumentLoader()->writer()->begin(KURL()); // create the empty document
284 loader->activeDocumentLoader()->writer()->addData(data()->data(), data()->size());
285 loader->activeDocumentLoader()->writer()->end();
286 frame->view()->setTransparent(true); // SVG Images are transparent.
287 }
288
289 return m_page;
290 }
291
filenameExtension() const292 String SVGImage::filenameExtension() const
293 {
294 return "svg";
295 }
296
297 }
298
299 #endif // ENABLE(SVG)
300