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/*
* Copyright (C) 2008, 2009 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef ScriptController_h
#define ScriptController_h
#include "bindings/v8/ScriptValue.h"
#include "bindings/v8/SharedPersistent.h"
#include "core/fetch/CrossOriginAccessControl.h"
#include "wtf/Forward.h"
#include "wtf/HashMap.h"
#include "wtf/RefCounted.h"
#include "wtf/Vector.h"
#include "wtf/text/TextPosition.h"
#include <v8.h>
struct NPObject;
namespace WebCore {
class DOMWrapperWorld;
class ExecutionContext;
class Event;
class Frame;
class HTMLDocument;
class HTMLPlugInElement;
class KURL;
class ScriptSourceCode;
class ScriptState;
class SecurityOrigin;
class V8WindowShell;
class Widget;
typedef WTF::Vector<v8::Extension*> V8Extensions;
enum ReasonForCallingCanExecuteScripts {
AboutToExecuteScript,
NotAboutToExecuteScript
};
class ScriptController {
public:
enum ExecuteScriptPolicy {
ExecuteScriptWhenScriptsDisabled,
DoNotExecuteScriptWhenScriptsDisabled
};
ScriptController(Frame*);
~ScriptController();
bool initializeMainWorld();
V8WindowShell* windowShell(DOMWrapperWorld*);
V8WindowShell* existingWindowShell(DOMWrapperWorld*);
// Evaluate JavaScript in the main world.
void executeScriptInMainWorld(const String&, ExecuteScriptPolicy = DoNotExecuteScriptWhenScriptsDisabled);
void executeScriptInMainWorld(const ScriptSourceCode&, AccessControlStatus = NotSharableCrossOrigin);
ScriptValue executeScriptInMainWorldAndReturnValue(const ScriptSourceCode&);
v8::Local<v8::Value> executeScriptAndReturnValue(v8::Handle<v8::Context>, const ScriptSourceCode&, AccessControlStatus = NotSharableCrossOrigin);
// Executes JavaScript in an isolated world. The script gets its own global scope,
// its own prototypes for intrinsic JavaScript objects (String, Array, and so-on),
// and its own wrappers for all DOM nodes and DOM constructors.
//
// If an isolated world with the specified ID already exists, it is reused.
// Otherwise, a new world is created.
//
// FIXME: Get rid of extensionGroup here.
void executeScriptInIsolatedWorld(int worldID, const Vector<ScriptSourceCode>& sources, int extensionGroup, Vector<ScriptValue>* results);
// Returns true if argument is a JavaScript URL.
bool executeScriptIfJavaScriptURL(const KURL&);
v8::Local<v8::Value> callFunction(v8::Handle<v8::Function>, v8::Handle<v8::Object>, int argc, v8::Handle<v8::Value> argv[]);
static v8::Local<v8::Value> callFunction(ExecutionContext*, v8::Handle<v8::Function>, v8::Handle<v8::Object> receiver, int argc, v8::Handle<v8::Value> info[], v8::Isolate*);
// Returns true if the current world is isolated, and has its own Content
// Security Policy. In this case, the policy of the main world should be
// ignored when evaluating resources injected into the DOM.
bool shouldBypassMainWorldContentSecurityPolicy();
// Creates a property of the global object of a frame.
void bindToWindowObject(Frame*, const String& key, NPObject*);
PassRefPtr<SharedPersistent<v8::Object> > createPluginWrapper(Widget*);
void enableEval();
void disableEval(const String& errorMessage);
static bool canAccessFromCurrentOrigin(Frame*);
static void setCaptureCallStackForUncaughtExceptions(bool);
void collectIsolatedContexts(Vector<std::pair<ScriptState*, SecurityOrigin*> >&);
bool canExecuteScripts(ReasonForCallingCanExecuteScripts);
// Returns V8 Context. If none exists, creates a new context.
// It is potentially slow and consumes memory.
static v8::Local<v8::Context> mainWorldContext(Frame*);
v8::Local<v8::Context> mainWorldContext();
v8::Local<v8::Context> currentWorldContext();
TextPosition eventHandlerPosition() const;
const String* sourceURL() const { return m_sourceURL; } // 0 if we are not evaluating any script.
void clearWindowShell();
void updateDocument();
void namedItemAdded(HTMLDocument*, const AtomicString&);
void namedItemRemoved(HTMLDocument*, const AtomicString&);
void updateSecurityOrigin();
void clearScriptObjects();
void cleanupScriptObjectsForPlugin(Widget*);
void clearForClose();
void clearForOutOfMemory();
NPObject* createScriptObjectForPluginElement(HTMLPlugInElement*);
NPObject* windowScriptNPObject();
// Registers a v8 extension to be available on webpages. Will only
// affect v8 contexts initialized after this call. Takes ownership of
// the v8::Extension object passed.
static void registerExtensionIfNeeded(v8::Extension*);
static V8Extensions& registeredExtensions();
bool setContextDebugId(int);
static int contextDebugId(v8::Handle<v8::Context>);
v8::Isolate* isolate() const { return m_isolate; }
private:
typedef HashMap<int, OwnPtr<V8WindowShell> > IsolatedWorldMap;
typedef HashMap<Widget*, NPObject*> PluginObjectMap;
ScriptValue evaluateScriptInMainWorld(const ScriptSourceCode&, AccessControlStatus, ExecuteScriptPolicy);
void clearForClose(bool destroyGlobal);
Frame* m_frame;
const String* m_sourceURL;
v8::Isolate* m_isolate;
OwnPtr<V8WindowShell> m_windowShell;
IsolatedWorldMap m_isolatedWorlds;
// A mapping between Widgets and their corresponding script object.
// This list is used so that when the plugin dies, we can immediately
// invalidate all sub-objects which are associated with that plugin.
// The frame keeps a NPObject reference for each item on the list.
PluginObjectMap m_pluginObjects;
NPObject* m_windowScriptNPObject;
};
} // namespace WebCore
#endif // ScriptController_h
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