cef/cef1/include/cef_v8.h

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// Copyright (c) 2011 Marshall A. Greenblatt. 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 name Chromium Embedded
// Framework 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.
//
// ---------------------------------------------------------------------------
//
// The contents of this file must follow a specific format in order to
// support the CEF translator tool. See the translator.README.txt file in the
// tools directory for more information.
//
#ifndef CEF_INCLUDE_CEF_V8_H_
#define CEF_INCLUDE_CEF_V8_H_
#pragma once
#include "include/cef_base.h"
#include "include/cef_browser.h"
#include "include/cef_frame.h"
#include <vector>
class CefV8Handler;
class CefV8Value;
///
// Register a new V8 extension with the specified JavaScript extension code and
// handler. Functions implemented by the handler are prototyped using the
// keyword 'native'. The calling of a native function is restricted to the scope
// in which the prototype of the native function is defined. This function may
// be called on any thread.
//
// Example JavaScript extension code:
// <pre>
// // create the 'example' global object if it doesn't already exist.
// if (!example)
// example = {};
// // create the 'example.test' global object if it doesn't already exist.
// if (!example.test)
// example.test = {};
// (function() {
// // Define the function 'example.test.myfunction'.
// example.test.myfunction = function() {
// // Call CefV8Handler::Execute() with the function name 'MyFunction'
// // and no arguments.
// native function MyFunction();
// return MyFunction();
// };
// // Define the getter function for parameter 'example.test.myparam'.
// example.test.__defineGetter__('myparam', function() {
// // Call CefV8Handler::Execute() with the function name 'GetMyParam'
// // and no arguments.
// native function GetMyParam();
// return GetMyParam();
// });
// // Define the setter function for parameter 'example.test.myparam'.
// example.test.__defineSetter__('myparam', function(b) {
// // Call CefV8Handler::Execute() with the function name 'SetMyParam'
// // and a single argument.
// native function SetMyParam();
// if(b) SetMyParam(b);
// });
//
// // Extension definitions can also contain normal JavaScript variables
// // and functions.
// var myint = 0;
// example.test.increment = function() {
// myint += 1;
// return myint;
// };
// })();
// </pre>
// Example usage in the page:
// <pre>
// // Call the function.
// example.test.myfunction();
// // Set the parameter.
// example.test.myparam = value;
// // Get the parameter.
// value = example.test.myparam;
// // Call another function.
// example.test.increment();
// </pre>
///
/*--cef(optional_param=handler)--*/
bool CefRegisterExtension(const CefString& extension_name,
const CefString& javascript_code,
CefRefPtr<CefV8Handler> handler);
///
// Class that encapsulates a V8 context handle.
///
/*--cef(source=library)--*/
class CefV8Context : public virtual CefBase {
public:
///
// Returns the current (top) context object in the V8 context stack.
///
/*--cef()--*/
static CefRefPtr<CefV8Context> GetCurrentContext();
///
// Returns the entered (bottom) context object in the V8 context stack.
///
/*--cef()--*/
static CefRefPtr<CefV8Context> GetEnteredContext();
///
// Returns true if V8 is currently inside a context.
///
/*--cef()--*/
static bool InContext();
///
// Returns the browser for this context.
///
/*--cef()--*/
virtual CefRefPtr<CefBrowser> GetBrowser() =0;
///
// Returns the frame for this context.
///
/*--cef()--*/
virtual CefRefPtr<CefFrame> GetFrame() =0;
///
// Returns the global object for this context.
///
/*--cef()--*/
virtual CefRefPtr<CefV8Value> GetGlobal() =0;
///
// Enter this context. A context must be explicitly entered before creating a
// V8 Object, Array or Function asynchronously. Exit() must be called the same
// number of times as Enter() before releasing this context. V8 objects belong
// to the context in which they are created. Returns true if the scope was
// entered successfully.
///
/*--cef()--*/
virtual bool Enter() =0;
///
// Exit this context. Call this method only after calling Enter(). Returns
// true if the scope was exited successfully.
///
/*--cef()--*/
virtual bool Exit() =0;
///
// Returns true if this object is pointing to the same handle as |that|
// object.
///
/*--cef()--*/
virtual bool IsSame(CefRefPtr<CefV8Context> that) =0;
};
typedef std::vector<CefRefPtr<CefV8Value> > CefV8ValueList;
///
// Interface that should be implemented to handle V8 function calls. The methods
// of this class will always be called on the UI thread.
///
/*--cef(source=client)--*/
class CefV8Handler : public virtual CefBase {
public:
///
// Handle execution of the function identified by |name|. |object| is the
// receiver ('this' object) of the function. |arguments| is the list of
// arguments passed to the function. If execution succeeds set |retval| to the
// function return value. If execution fails set |exception| to the exception
// that will be thrown. Return true if execution was handled.
///
/*--cef()--*/
virtual bool Execute(const CefString& name,
CefRefPtr<CefV8Value> object,
const CefV8ValueList& arguments,
CefRefPtr<CefV8Value>& retval,
CefString& exception) =0;
};
///
// Interface that should be implemented to handle V8 accessor calls. Accessor
// identifiers are registered by calling CefV8Value::SetValue(). The methods
// of this class will always be called on the UI thread.
///
/*--cef(source=client)--*/
class CefV8Accessor : public virtual CefBase {
public:
///
// Handle retrieval the accessor value identified by |name|. |object| is the
// receiver ('this' object) of the accessor. If retrieval succeeds set
// |retval| to the return value. If retrieval fails set |exception| to the
// exception that will be thrown. Return true if accessor retrieval was
// handled.
///
/*--cef()--*/
virtual bool Get(const CefString& name,
const CefRefPtr<CefV8Value> object,
CefRefPtr<CefV8Value>& retval,
CefString& exception) =0;
///
// Handle assignment of the accessor value identified by |name|. |object| is
// the receiver ('this' object) of the accessor. |value| is the new value
// being assigned to the accessor. If assignment fails set |exception| to the
// exception that will be thrown. Return true if accessor assignment was
// handled.
///
/*--cef()--*/
virtual bool Set(const CefString& name,
const CefRefPtr<CefV8Value> object,
const CefRefPtr<CefV8Value> value,
CefString& exception) =0;
};
///
// Class representing a V8 exception.
///
/*--cef(source=library)--*/
class CefV8Exception : public virtual CefBase {
public:
///
// Returns the exception message.
///
/*--cef()--*/
virtual CefString GetMessage() =0;
///
// Returns the line of source code that the exception occurred within.
///
/*--cef()--*/
virtual CefString GetSourceLine() =0;
///
// Returns the resource name for the script from where the function causing
// the error originates.
///
/*--cef()--*/
virtual CefString GetScriptResourceName() =0;
///
// Returns the 1-based number of the line where the error occurred or 0 if the
// line number is unknown.
///
/*--cef()--*/
virtual int GetLineNumber() =0;
///
// Returns the index within the script of the first character where the error
// occurred.
///
/*--cef()--*/
virtual int GetStartPosition() =0;
///
// Returns the index within the script of the last character where the error
// occurred.
///
/*--cef()--*/
virtual int GetEndPosition() =0;
///
// Returns the index within the line of the first character where the error
// occurred.
///
/*--cef()--*/
virtual int GetStartColumn() =0;
///
// Returns the index within the line of the last character where the error
// occurred.
///
/*--cef()--*/
virtual int GetEndColumn() =0;
};
///
// Class representing a V8 value. The methods of this class should only be
// called on the UI thread.
///
/*--cef(source=library)--*/
class CefV8Value : public virtual CefBase {
public:
typedef cef_v8_accesscontrol_t AccessControl;
typedef cef_v8_propertyattribute_t PropertyAttribute;
///
// Create a new CefV8Value object of type undefined.
///
/*--cef()--*/
static CefRefPtr<CefV8Value> CreateUndefined();
///
// Create a new CefV8Value object of type null.
///
/*--cef()--*/
static CefRefPtr<CefV8Value> CreateNull();
///
// Create a new CefV8Value object of type bool.
///
/*--cef()--*/
static CefRefPtr<CefV8Value> CreateBool(bool value);
///
// Create a new CefV8Value object of type int.
///
/*--cef()--*/
static CefRefPtr<CefV8Value> CreateInt(int value);
///
// Create a new CefV8Value object of type double.
///
/*--cef()--*/
static CefRefPtr<CefV8Value> CreateDouble(double value);
///
// Create a new CefV8Value object of type Date.
///
/*--cef()--*/
static CefRefPtr<CefV8Value> CreateDate(const CefTime& date);
///
// Create a new CefV8Value object of type string.
///
/*--cef(optional_param=value)--*/
static CefRefPtr<CefV8Value> CreateString(const CefString& value);
///
// Create a new CefV8Value object of type object with optional user data and
// accessor. This method should only be called from within the scope of a
// CefV8ContextHandler, CefV8Handler or CefV8Accessor callback, or in
// combination with calling Enter() and Exit() on a stored CefV8Context
// reference.
///
/*--cef(capi_name=cef_v8value_create_object_with_accessor,
optional_param=user_data,optional_param=accessor)--*/
static CefRefPtr<CefV8Value> CreateObject(CefRefPtr<CefBase> user_data,
CefRefPtr<CefV8Accessor> accessor);
///
// Create a new CefV8Value object of type array. This method should only be
// called from within the scope of a CefV8ContextHandler, CefV8Handler or
// CefV8Accessor callback, or in combination with calling Enter() and Exit()
// on a stored CefV8Context reference.
///
/*--cef()--*/
static CefRefPtr<CefV8Value> CreateArray();
///
// Create a new CefV8Value object of type function. This method should only be
// called from within the scope of a CefV8ContextHandler, CefV8Handler or
// CefV8Accessor callback, or in combination with calling Enter() and Exit()
// on a stored CefV8Context reference.
///
/*--cef()--*/
static CefRefPtr<CefV8Value> CreateFunction(const CefString& name,
CefRefPtr<CefV8Handler> handler);
///
// True if the value type is undefined.
///
/*--cef()--*/
virtual bool IsUndefined() =0;
///
// True if the value type is null.
///
/*--cef()--*/
virtual bool IsNull() =0;
///
// True if the value type is bool.
///
/*--cef()--*/
virtual bool IsBool() =0;
///
// True if the value type is int.
///
/*--cef()--*/
virtual bool IsInt() =0;
///
// True if the value type is double.
///
/*--cef()--*/
virtual bool IsDouble() =0;
///
// True if the value type is Date.
///
/*--cef()--*/
virtual bool IsDate() =0;
///
// True if the value type is string.
///
/*--cef()--*/
virtual bool IsString() =0;
///
// True if the value type is object.
///
/*--cef()--*/
virtual bool IsObject() =0;
///
// True if the value type is array.
///
/*--cef()--*/
virtual bool IsArray() =0;
///
// True if the value type is function.
///
/*--cef()--*/
virtual bool IsFunction() =0;
///
// Returns true if this object is pointing to the same handle as |that|
// object.
///
/*--cef()--*/
virtual bool IsSame(CefRefPtr<CefV8Value> that) =0;
///
// Return a bool value. The underlying data will be converted to if
// necessary.
///
/*--cef()--*/
virtual bool GetBoolValue() =0;
///
// Return an int value. The underlying data will be converted to if
// necessary.
///
/*--cef()--*/
virtual int GetIntValue() =0;
///
// Return a double value. The underlying data will be converted to if
// necessary.
///
/*--cef()--*/
virtual double GetDoubleValue() =0;
///
// Return a Date value. The underlying data will be converted to if
// necessary.
///
/*--cef()--*/
virtual CefTime GetDateValue() =0;
///
// Return a string value. The underlying data will be converted to if
// necessary.
///
/*--cef()--*/
virtual CefString GetStringValue() =0;
// OBJECT METHODS - These methods are only available on objects. Arrays and
// functions are also objects. String- and integer-based keys can be used
// interchangably with the framework converting between them as necessary.
///
// Returns true if the object has a value with the specified identifier.
///
/*--cef(capi_name=has_value_bykey)--*/
virtual bool HasValue(const CefString& key) =0;
///
// Returns true if the object has a value with the specified identifier.
///
/*--cef(capi_name=has_value_byindex,index_param=index)--*/
virtual bool HasValue(int index) =0;
///
// Delete the value with the specified identifier.
///
/*--cef(capi_name=delete_value_bykey)--*/
virtual bool DeleteValue(const CefString& key) =0;
///
// Delete the value with the specified identifier.
///
/*--cef(capi_name=delete_value_byindex,index_param=index)--*/
virtual bool DeleteValue(int index) =0;
///
// Returns the value with the specified identifier.
///
/*--cef(capi_name=get_value_bykey)--*/
virtual CefRefPtr<CefV8Value> GetValue(const CefString& key) =0;
///
// Returns the value with the specified identifier.
///
/*--cef(capi_name=get_value_byindex,index_param=index)--*/
virtual CefRefPtr<CefV8Value> GetValue(int index) =0;
///
// Associate a value with the specified identifier.
///
/*--cef(capi_name=set_value_bykey)--*/
virtual bool SetValue(const CefString& key, CefRefPtr<CefV8Value> value,
PropertyAttribute attribute) =0;
///
// Associate a value with the specified identifier.
///
/*--cef(capi_name=set_value_byindex,index_param=index)--*/
virtual bool SetValue(int index, CefRefPtr<CefV8Value> value) =0;
///
// Register an identifier whose access will be forwarded to the CefV8Accessor
// instance passed to CefV8Value::CreateObject().
///
/*--cef(capi_name=set_value_byaccessor)--*/
virtual bool SetValue(const CefString& key, AccessControl settings,
PropertyAttribute attribute) =0;
///
// Read the keys for the object's values into the specified vector. Integer-
// based keys will also be returned as strings.
///
/*--cef()--*/
virtual bool GetKeys(std::vector<CefString>& keys) =0;
///
// Returns the user data, if any, specified when the object was created.
///
/*--cef()--*/
virtual CefRefPtr<CefBase> GetUserData() =0;
///
// Returns the amount of externally allocated memory registered for the
// object.
///
/*--cef()--*/
virtual int GetExternallyAllocatedMemory() =0;
///
// Adjusts the amount of registered external memory for the object. Used to
// give V8 an indication of the amount of externally allocated memory that is
// kept alive by JavaScript objects. V8 uses this information to decide when
// to perform global garbage collection. Each CefV8Value tracks the amount of
// external memory associated with it and automatically decreases the global
// total by the appropriate amount on its destruction. |change_in_bytes|
// specifies the number of bytes to adjust by. This method returns the number
// of bytes associated with the object after the adjustment.
///
/*--cef()--*/
virtual int AdjustExternallyAllocatedMemory(int change_in_bytes) =0;
// ARRAY METHODS - These methods are only available on arrays.
///
// Returns the number of elements in the array.
///
/*--cef()--*/
virtual int GetArrayLength() =0;
// FUNCTION METHODS - These methods are only available on functions.
///
// Returns the function name.
///
/*--cef()--*/
virtual CefString GetFunctionName() =0;
///
// Returns the function handler or NULL if not a CEF-created function.
///
/*--cef()--*/
virtual CefRefPtr<CefV8Handler> GetFunctionHandler() =0;
///
// Execute the function using the current V8 context. This method should only
// be called from within the scope of a CefV8Handler or CefV8Accessor
// callback, or in combination with calling Enter() and Exit() on a stored
// CefV8Context reference. |object| is the receiver ('this' object) of the
// function. |arguments| is the list of arguments that will be passed to the
// function. If execution succeeds |retval| will be set to the function return
// value. If execution fails |exception| will be set to the exception that was
// thrown. If |rethrow_exception| is true any exception will also be re-
// thrown. This method returns false if called incorrectly.
///
/*--cef(optional_param=object)--*/
virtual bool ExecuteFunction(CefRefPtr<CefV8Value> object,
const CefV8ValueList& arguments,
CefRefPtr<CefV8Value>& retval,
CefRefPtr<CefV8Exception>& exception,
bool rethrow_exception) =0;
///
// Execute the function using the specified V8 context. |object| is the
// receiver ('this' object) of the function. |arguments| is the list of
// arguments that will be passed to the function. If execution succeeds
// |retval| will be set to the function return value. If execution fails
// |exception| will be set to the exception that was thrown. If
// |rethrow_exception| is true any exception will also be re-thrown. This
// method returns false if called incorrectly.
///
/*--cef(optional_param=object)--*/
virtual bool ExecuteFunctionWithContext(CefRefPtr<CefV8Context> context,
CefRefPtr<CefV8Value> object,
const CefV8ValueList& arguments,
CefRefPtr<CefV8Value>& retval,
CefRefPtr<CefV8Exception>& exception,
bool rethrow_exception) =0;
};
#endif // CEF_INCLUDE_CEF_V8_H_