Home | History | Annotate | Download | only in specialization 
      1 /*
      2  * Copyright (C) 2009 Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions are
      6  * met:
      7  *
      8  *     * Redistributions of source code must retain the above copyright
      9  * notice, this list of conditions and the following disclaimer.
     10  *     * Redistributions in binary form must reproduce the above
     11  * copyright notice, this list of conditions and the following disclaimer
     12  * in the documentation and/or other materials provided with the
     13  * distribution.
     14  *     * Neither the name of Google Inc. nor the names of its
     15  * contributors may be used to endorse or promote products derived from
     16  * this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     29  */
     30 
     31 #include "config.h"
     32 #include "V8BindingState.h"
     33 
     34 #include "Frame.h"
     35 #include "ScriptController.h"
     36 #include "V8Proxy.h"
     37 #include <wtf/StdLibExtras.h>
     38 
     39 namespace WebCore {
     40 
     41 State<V8Binding>* State<V8Binding>::Only()
     42 {
     43     DEFINE_STATIC_LOCAL(State, globalV8BindingState, ());
     44     return &globalV8BindingState;
     45 }
     46 
     47 DOMWindow* State<V8Binding>::activeWindow()
     48 {
     49     v8::Local<v8::Context> activeContext = v8::Context::GetCalling();
     50     if (activeContext.IsEmpty()) {
     51         // There is a single activation record on the stack, so that must
     52         // be the activeContext.
     53         activeContext = v8::Context::GetCurrent();
     54     }
     55     return V8Proxy::retrieveWindow(activeContext);
     56 }
     57 
     58 DOMWindow* State<V8Binding>::firstWindow()
     59 {
     60     return V8Proxy::retrieveWindow(v8::Context::GetEntered());
     61 }
     62 
     63 Frame* State<V8Binding>::activeFrame()
     64 {
     65     Frame* frame = V8Proxy::retrieveFrameForCallingContext();
     66     if (!frame) {
     67         // Unfortunately, when processing script from a plug-in, we might not
     68         // have a calling context.  In those cases, we fall back to the
     69         // entered context for security checks.
     70         // FIXME: We need a better API for retrieving frames that abstracts
     71         //        away this concern.
     72         frame = V8Proxy::retrieveFrameForEnteredContext();
     73     }
     74     return frame;
     75 }
     76 
     77 Frame* State<V8Binding>::firstFrame()
     78 {
     79     return V8Proxy::retrieveFrameForEnteredContext();
     80 }
     81 
     82 void State<V8Binding>::immediatelyReportUnsafeAccessTo(Frame* target)
     83 {
     84     V8Proxy::reportUnsafeAccessTo(target);
     85 }
     86 
     87 bool State<V8Binding>::processingUserGesture()
     88 {
     89     return ScriptController::processingUserGesture();
     90 }
     91 
     92 bool State<V8Binding>::allowsAccessFromFrame(Frame* frame)
     93 {
     94     return ScriptController::isSafeScript(frame);
     95 }
     96 
     97 } // namespace WebCore
     98