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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef ScriptState_h | 5 #ifndef ScriptState_h |
| 6 #define ScriptState_h | 6 #define ScriptState_h |
| 7 | 7 |
| 8 #include <memory> | 8 #include <memory> |
| 9 | 9 |
| 10 #include "bindings/core/v8/ScopedPersistent.h" | 10 #include "bindings/core/v8/ScopedPersistent.h" |
| 11 #include "bindings/core/v8/V8PerContextData.h" | 11 #include "bindings/core/v8/V8PerContextData.h" |
| 12 #include "core/CoreExport.h" | 12 #include "core/CoreExport.h" |
| 13 #include "v8/include/v8-debug.h" | 13 #include "v8/include/v8-debug.h" |
| 14 #include "v8/include/v8.h" | 14 #include "v8/include/v8.h" |
| 15 #include "wtf/RefCounted.h" | 15 #include "wtf/RefCounted.h" |
| 16 | 16 |
| 17 namespace blink { | 17 namespace blink { |
| 18 | 18 |
| 19 class LocalDOMWindow; | 19 class LocalDOMWindow; |
| 20 class DOMWrapperWorld; | 20 class DOMWrapperWorld; |
| 21 class ExecutionContext; | 21 class ExecutionContext; |
| 22 class LocalFrame; | |
| 23 class ScriptValue; | 22 class ScriptValue; |
| 24 | 23 |
| 25 // ScriptState is an abstraction class that holds all information about script | 24 // ScriptState is an abstraction class that holds all information about script |
| 26 // exectuion (e.g., v8::Isolate, v8::Context, DOMWrapperWorld, ExecutionContext | 25 // exectuion (e.g., v8::Isolate, v8::Context, DOMWrapperWorld, ExecutionContext |
| 27 // etc). If you need any info about the script execution, you're expected to | 26 // etc). If you need any info about the script execution, you're expected to |
| 28 // pass around ScriptState in the code base. ScriptState is in a 1:1 | 27 // pass around ScriptState in the code base. ScriptState is in a 1:1 |
| 29 // relationship with v8::Context. | 28 // relationship with v8::Context. |
| 30 // | 29 // |
| 31 // When you need ScriptState, you can add [CallWith=ScriptState] to IDL files | 30 // When you need ScriptState, you can add [CallWith=ScriptState] to IDL files |
| 32 // and pass around ScriptState into a place where you need ScriptState. | 31 // and pass around ScriptState into a place where you need ScriptState. |
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| 129 ScriptState* scriptState = | 128 ScriptState* scriptState = |
| 130 static_cast<ScriptState*>(context->GetAlignedPointerFromEmbedderData( | 129 static_cast<ScriptState*>(context->GetAlignedPointerFromEmbedderData( |
| 131 v8ContextPerContextDataIndex)); | 130 v8ContextPerContextDataIndex)); |
| 132 // ScriptState::from() must not be called for a context that does not have | 131 // ScriptState::from() must not be called for a context that does not have |
| 133 // valid embedder data in the embedder field. | 132 // valid embedder data in the embedder field. |
| 134 SECURITY_CHECK(scriptState); | 133 SECURITY_CHECK(scriptState); |
| 135 SECURITY_CHECK(scriptState->context() == context); | 134 SECURITY_CHECK(scriptState->context() == context); |
| 136 return scriptState; | 135 return scriptState; |
| 137 } | 136 } |
| 138 | 137 |
| 139 // These methods can return nullptr if the context associated with the | |
| 140 // ScriptState has already been detached. | |
| 141 | |
| 142 // DEPRECATED: Use toScriptStateForMainWorld. | |
| 143 static ScriptState* forMainWorld(LocalFrame*); | |
| 144 // DEPRECATED: Use toScriptState. | |
| 145 static ScriptState* forWorld(LocalFrame*, DOMWrapperWorld&); | |
| 146 | |
| 147 v8::Isolate* isolate() const { return m_isolate; } | 138 v8::Isolate* isolate() const { return m_isolate; } |
| 148 DOMWrapperWorld& world() const { return *m_world; } | 139 DOMWrapperWorld& world() const { return *m_world; } |
| 149 LocalDOMWindow* domWindow() const; | 140 LocalDOMWindow* domWindow() const; |
| 150 virtual ExecutionContext* getExecutionContext() const; | 141 virtual ExecutionContext* getExecutionContext() const; |
| 151 virtual void setExecutionContext(ExecutionContext*); | 142 virtual void setExecutionContext(ExecutionContext*); |
| 152 | 143 |
| 153 // This can return an empty handle if the v8::Context is gone. | 144 // This can return an empty handle if the v8::Context is gone. |
| 154 v8::Local<v8::Context> context() const { | 145 v8::Local<v8::Context> context() const { |
| 155 return m_context.newLocal(m_isolate); | 146 return m_context.newLocal(m_isolate); |
| 156 } | 147 } |
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| 208 } | 199 } |
| 209 | 200 |
| 210 private: | 201 private: |
| 211 RefPtr<ScriptState> m_scriptState; | 202 RefPtr<ScriptState> m_scriptState; |
| 212 ScopedPersistent<v8::Context> m_context; | 203 ScopedPersistent<v8::Context> m_context; |
| 213 }; | 204 }; |
| 214 | 205 |
| 215 } // namespace blink | 206 } // namespace blink |
| 216 | 207 |
| 217 #endif // ScriptState_h | 208 #endif // ScriptState_h |
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