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      1 /*
      2  * Copyright (C) 2007, 2008, 2009 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  */
     19 
     20 #include "config.h"
     21 #include "JSDocument.h"
     22 
     23 #include "ExceptionCode.h"
     24 #include "Frame.h"
     25 #include "FrameLoader.h"
     26 #include "HTMLDocument.h"
     27 #include "JSCanvasRenderingContext2D.h"
     28 #if ENABLE(3D_CANVAS)
     29 #include "JSWebGLRenderingContext.h"
     30 #endif
     31 #include "JSDOMWindowCustom.h"
     32 #include "JSHTMLDocument.h"
     33 #include "JSLocation.h"
     34 #include "Location.h"
     35 #include "ScriptController.h"
     36 
     37 #if ENABLE(SVG)
     38 #include "JSSVGDocument.h"
     39 #include "SVGDocument.h"
     40 #endif
     41 
     42 #include <wtf/GetPtr.h>
     43 
     44 using namespace JSC;
     45 
     46 namespace WebCore {
     47 
     48 void JSDocument::markChildren(MarkStack& markStack)
     49 {
     50     JSNode::markChildren(markStack);
     51 
     52     Document* document = impl();
     53     JSGlobalData& globalData = *Heap::heap(this)->globalData();
     54 
     55     markDOMNodesForDocument(markStack, document);
     56     markActiveObjectsForContext(markStack, globalData, document);
     57     markDOMObjectWrapper(markStack, globalData, document->implementation());
     58     markDOMObjectWrapper(markStack, globalData, document->styleSheets());
     59 }
     60 
     61 JSValue JSDocument::location(ExecState* exec) const
     62 {
     63     Frame* frame = static_cast<Document*>(impl())->frame();
     64     if (!frame)
     65         return jsNull();
     66 
     67     Location* location = frame->domWindow()->location();
     68     if (DOMObject* wrapper = getCachedDOMObjectWrapper(exec, location))
     69         return wrapper;
     70 
     71     JSLocation* jsLocation = new (exec) JSLocation(getDOMStructure<JSLocation>(exec, globalObject()), globalObject(), location);
     72     cacheDOMObjectWrapper(exec, location, jsLocation);
     73     return jsLocation;
     74 }
     75 
     76 void JSDocument::setLocation(ExecState* exec, JSValue value)
     77 {
     78     Frame* frame = static_cast<Document*>(impl())->frame();
     79     if (!frame)
     80         return;
     81 
     82     String str = value.toString(exec);
     83 
     84     // IE and Mozilla both resolve the URL relative to the source frame,
     85     // not the target frame.
     86     Frame* activeFrame = asJSDOMWindow(exec->dynamicGlobalObject())->impl()->frame();
     87     if (activeFrame)
     88         str = activeFrame->document()->completeURL(str).string();
     89 
     90     bool userGesture = activeFrame->script()->processingUserGesture(currentWorld(exec));
     91     frame->redirectScheduler()->scheduleLocationChange(str, activeFrame->loader()->outgoingReferrer(), !activeFrame->script()->anyPageIsProcessingUserGesture(), false, userGesture);
     92 }
     93 
     94 JSValue toJS(ExecState* exec, JSDOMGlobalObject* globalObject, Document* document)
     95 {
     96     if (!document)
     97         return jsNull();
     98 
     99     DOMObject* wrapper = getCachedDOMNodeWrapper(exec, document, document);
    100     if (wrapper)
    101         return wrapper;
    102 
    103     if (document->isHTMLDocument())
    104         wrapper = CREATE_DOM_NODE_WRAPPER(exec, globalObject, HTMLDocument, document);
    105 #if ENABLE(SVG)
    106     else if (document->isSVGDocument())
    107         wrapper = CREATE_DOM_NODE_WRAPPER(exec, globalObject, SVGDocument, document);
    108 #endif
    109     else
    110         wrapper = CREATE_DOM_NODE_WRAPPER(exec, globalObject, Document, document);
    111 
    112     // Make sure the document is kept around by the window object, and works right with the
    113     // back/forward cache.
    114     if (!document->frame()) {
    115         size_t nodeCount = 0;
    116         for (Node* n = document; n; n = n->traverseNextNode())
    117             nodeCount++;
    118 
    119         exec->heap()->reportExtraMemoryCost(nodeCount * sizeof(Node));
    120     }
    121 
    122     return wrapper;
    123 }
    124 
    125 } // namespace WebCore
    126