code.vuplus.com Git - vuplus_webkit/blob - Source/WebCore/bindings/v8/V8Utilities.cpp

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  30
  31 #include "config.h"
  32 #include "V8Utilities.h"
  33
  34 #include <v8.h>
  35
  36 #include "Document.h"
  37 #include "Frame.h"
  38 #include "ScriptExecutionContext.h"
  39 #include "ScriptState.h"
  40 #include "V8Binding.h"
  41 #include "V8BindingState.h"
  42 #include "V8Proxy.h"
  43 #include "WorkerContext.h"
  44 #include "WorkerContextExecutionProxy.h"
  45
  46 #include <wtf/Assertions.h>
  47 #include "Frame.h"
  48
  49 namespace WebCore {
  50
  51 V8LocalContext::V8LocalContext()
  52     : m_context(v8::Context::New())
  53 {
  54     V8BindingPerIsolateData::ensureInitialized(v8::Isolate::GetCurrent());
  55     m_context->Enter();
  56 }
  57
  58
  59 V8LocalContext::~V8LocalContext()
  60 {
  61     m_context->Exit();
  62     m_context.Dispose();
  63 }
  64
  65 // Use an array to hold dependents. It works like a ref-counted scheme.
  66 // A value can be added more than once to the DOM object.
  67 void createHiddenDependency(v8::Handle<v8::Object> object, v8::Local<v8::Value> value, int cacheIndex)
  68 {
  69     v8::Local<v8::Value> cache = object->GetInternalField(cacheIndex);
  70     if (cache->IsNull() || cache->IsUndefined()) {
  71         cache = v8::Array::New();
  72         object->SetInternalField(cacheIndex, cache);
  73     }
  74
  75     v8::Local<v8::Array> cacheArray = v8::Local<v8::Array>::Cast(cache);
  76     cacheArray->Set(v8::Integer::New(cacheArray->Length()), value);
  77 }
  78
  79 void removeHiddenDependency(v8::Handle<v8::Object> object, v8::Local<v8::Value> value, int cacheIndex)
  80 {
  81     v8::Local<v8::Value> cache = object->GetInternalField(cacheIndex);
  82     if (!cache->IsArray())
  83         return;
  84     v8::Local<v8::Array> cacheArray = v8::Local<v8::Array>::Cast(cache);
  85     for (int i = cacheArray->Length() - 1; i >= 0; --i) {
  86         v8::Local<v8::Value> cached = cacheArray->Get(v8::Integer::New(i));
  87         if (cached->StrictEquals(value)) {
  88             cacheArray->Delete(i);
  89             return;
  90         }
  91     }
  92 }
  93
  94 void transferHiddenDependency(v8::Handle<v8::Object> object,
  95                               EventListener* oldValue,
  96                               v8::Local<v8::Value> newValue,
  97                               int cacheIndex)
  98 {
  99     if (oldValue) {
 100         V8AbstractEventListener* oldListener = V8AbstractEventListener::cast(oldValue);
 101         if (oldListener) {
 102             v8::Local<v8::Object> oldListenerObject = oldListener->getExistingListenerObject();
 103             if (!oldListenerObject.IsEmpty())
 104                 removeHiddenDependency(object, oldListenerObject, cacheIndex);
 105         }
 106     }
 107     if (!newValue->IsNull() && !newValue->IsUndefined())
 108         createHiddenDependency(object, newValue, cacheIndex);
 109 }
 110
 111 Frame* callingOrEnteredFrame()
 112 {
 113     return V8BindingState::Only()->activeFrame();
 114 }
 115
 116 bool shouldAllowNavigation(Frame* frame)
 117 {
 118     return V8BindingSecurity::shouldAllowNavigation(V8BindingState::Only(), frame);
 119 }
 120
 121 KURL completeURL(const String& relativeURL)
 122 {
 123     return completeURL(V8BindingState::Only(), relativeURL);
 124 }
 125
 126 ScriptExecutionContext* getScriptExecutionContext()
 127 {
 128 #if ENABLE(WORKERS)
 129     if (WorkerScriptController* controller = WorkerScriptController::controllerForContext())
 130         return controller->workerContext();
 131 #endif
 132
 133     if (Frame* frame = V8Proxy::retrieveFrameForCurrentContext())
 134         return frame->document()->scriptExecutionContext();
 135
 136     return 0;
 137 }
 138
 139 void throwTypeMismatchException()
 140 {
 141     V8Proxy::throwError(V8Proxy::GeneralError, "TYPE_MISMATCH_ERR: DOM Exception 17");
 142 }
 143
 144 } // namespace WebCore