Interface ICefv8Value

Description
Hierarchy
Fields
Methods
Properties

Unit

uCEFInterfaces

Declaration

type ICefv8Value = interface(ICefBaseRefCounted)

Description

Interface representing a V8 value handle. V8 handles can only be accessed from the thread on which they are created. Valid threads for creating a V8 handle include the render process main thread (TID_RENDERER) and WebWorker threads. A task runner for posting tasks on the associated thread can be retrieved via the ICefv8context.GetTaskRunner() function.

UNKNOWN

<see href="https://bitbucket.org/chromiumembedded/cef/src/master/include/capi/cef_v8_capi.h">CEF source file: /include/capi/cef_v8_capi.h (cef_v8value_t))

Hierarchy

Overview

Methods

Public function IsValid: Boolean;
Public function IsUndefined: Boolean;
Public function IsNull: Boolean;
Public function IsBool: Boolean;
Public function IsInt: Boolean;
Public function IsUInt: Boolean;
Public function IsDouble: Boolean;
Public function IsDate: Boolean;
Public function IsString: Boolean;
Public function IsObject: Boolean;
Public function IsArray: Boolean;
Public function IsArrayBuffer: Boolean;
Public function IsFunction: Boolean;
Public function IsPromise: Boolean;
Public function IsSame(const that: ICefv8Value): Boolean;
Public function GetBoolValue: Boolean;
Public function GetIntValue: Integer;
Public function GetUIntValue: Cardinal;
Public function GetDoubleValue: Double;
Public function GetDateValue: TDateTime;
Public function GetStringValue: ustring;
Public function IsUserCreated: Boolean;
Public function HasException: Boolean;
Public function GetException: ICefV8Exception;
Public function ClearException: Boolean;
Public function WillRethrowExceptions: Boolean;
Public function SetRethrowExceptions(rethrow: Boolean): Boolean;
Public function HasValueByKey(const key: ustring): Boolean;
Public function HasValueByIndex(index: Integer): Boolean;
Public function DeleteValueByKey(const key: ustring): Boolean;
Public function DeleteValueByIndex(index: Integer): Boolean;
Public function GetValueByKey(const key: ustring): ICefv8Value;
Public function GetValueByIndex(index: Integer): ICefv8Value;
Public function SetValueByKey(const key: ustring; const value: ICefv8Value; attribute: TCefV8PropertyAttributes): Boolean;
Public function SetValueByIndex(index: Integer; const value: ICefv8Value): Boolean;
Public function SetValueByAccessor(const key: ustring; settings: TCefV8AccessControls; attribute: TCefV8PropertyAttributes): Boolean;
Public function GetKeys(const keys: TStrings): Integer;
Public function SetUserData(const data: ICefv8Value): Boolean;
Public function GetUserData: ICefv8Value;
Public function GetExternallyAllocatedMemory: Integer;
Public function AdjustExternallyAllocatedMemory(changeInBytes: Integer): Integer;
Public function GetArrayLength: Integer;
Public function GetArrayBufferReleaseCallback: ICefv8ArrayBufferReleaseCallback;
Public function NeuterArrayBuffer: boolean;
Public function GetArrayBufferByteLength: NativeUInt;
Public function GetArrayBufferData: Pointer;
Public function GetFunctionName: ustring;
Public function GetFunctionHandler: ICefv8Handler;
Public function ExecuteFunction(const obj: ICefv8Value; const arguments: TCefv8ValueArray): ICefv8Value;
Public function ExecuteFunctionWithContext(const context: ICefv8Context; const obj: ICefv8Value; const arguments: TCefv8ValueArray): ICefv8Value;
Public function ResolvePromise(const arg: ICefv8Value): boolean;
Public function RejectPromise(const errorMsg: ustring): boolean;

Description

Methods

Public function IsValid: Boolean;

Returns true (1) if the underlying handle is valid and it can be accessed on the current thread. Do not call any other functions if this function returns false (0).

Attributes
GUID['{52319B8D-75A8-422C-BD4B-16FA08CC7F42}']
Public function IsUndefined: Boolean;

True if the value type is undefined.

Public function IsNull: Boolean;

True if the value type is null.

Public function IsBool: Boolean;

True if the value type is bool.

Public function IsInt: Boolean;

True if the value type is int.

Public function IsUInt: Boolean;

True if the value type is unsigned int.

Public function IsDouble: Boolean;

True if the value type is double.

Public function IsDate: Boolean;

True if the value type is Date.

Public function IsString: Boolean;

True if the value type is string.

Public function IsObject: Boolean;

True if the value type is object.

Public function IsArray: Boolean;

True if the value type is array.

Public function IsArrayBuffer: Boolean;

True if the value type is an ArrayBuffer.

Public function IsFunction: Boolean;

True if the value type is function.

Public function IsPromise: Boolean;

True if the value type is a Promise.

Public function IsSame(const that: ICefv8Value): Boolean;

Returns true (1) if this object is pointing to the same handle as |that| object.

Public function GetBoolValue: Boolean;

Return a bool value.

Public function GetIntValue: Integer;

Return an int value.

Public function GetUIntValue: Cardinal;

Return an unsigned int value.

Public function GetDoubleValue: Double;

Return a double value.

Public function GetDateValue: TDateTime;

Return a Date value.

Public function GetStringValue: ustring;

Return a string value.

Public function IsUserCreated: Boolean;

Returns true (1) if this is a user created object.

Public function HasException: Boolean;

Returns true (1) if the last function call resulted in an exception. This attribute exists only in the scope of the current CEF value object.

Public function GetException: ICefV8Exception;

Returns the exception resulting from the last function call. This attribute exists only in the scope of the current CEF value object.

Public function ClearException: Boolean;

Clears the last exception and returns true (1) on success.

Public function WillRethrowExceptions: Boolean;

Returns true (1) if this object will re-throw future exceptions. This attribute exists only in the scope of the current CEF value object.

Public function SetRethrowExceptions(rethrow: Boolean): Boolean;

Set whether this object will re-throw future exceptions. By default exceptions are not re-thrown. If a exception is re-thrown the current context should not be accessed again until after the exception has been caught and not re-thrown. Returns true (1) on success. This attribute exists only in the scope of the current CEF value object.

Public function HasValueByKey(const key: ustring): Boolean;

Returns true (1) if the object has a value with the specified identifier.

Public function HasValueByIndex(index: Integer): Boolean;

Returns true (1) if the object has a value with the specified identifier.

Public function DeleteValueByKey(const key: ustring): Boolean;

Deletes the value with the specified identifier and returns true (1) on success. Returns false (0) if this function is called incorrectly or an exception is thrown. For read-only and don't-delete values this function will return true (1) even though deletion failed.

Public function DeleteValueByIndex(index: Integer): Boolean;

Deletes the value with the specified identifier and returns true (1) on success. Returns false (0) if this function is called incorrectly, deletion fails or an exception is thrown. For read-only and don't-delete values this function will return true (1) even though deletion failed.

Public function GetValueByKey(const key: ustring): ICefv8Value;

Returns the value with the specified identifier on success. Returns NULL if this function is called incorrectly or an exception is thrown.

Public function GetValueByIndex(index: Integer): ICefv8Value;

Returns the value with the specified identifier on success. Returns NULL if this function is called incorrectly or an exception is thrown.

Public function SetValueByKey(const key: ustring; const value: ICefv8Value; attribute: TCefV8PropertyAttributes): Boolean;

Associates a value with the specified identifier and returns true (1) on success. Returns false (0) if this function is called incorrectly or an exception is thrown. For read-only values this function will return true (1) even though assignment failed.

Public function SetValueByIndex(index: Integer; const value: ICefv8Value): Boolean;

Associates a value with the specified identifier and returns true (1) on success. Returns false (0) if this function is called incorrectly or an exception is thrown. For read-only values this function will return true (1) even though assignment failed.

Public function SetValueByAccessor(const key: ustring; settings: TCefV8AccessControls; attribute: TCefV8PropertyAttributes): Boolean;

Registers an identifier and returns true (1) on success. Access to the identifier will be forwarded to the ICefV8Accessor instance passed to cef_v8value_create_object(). Returns false (0) if this function is called incorrectly or an exception is thrown. For read-only values this function will return true (1) even though assignment failed.

Public function GetKeys(const keys: TStrings): Integer;

Read the keys for the object's values into the specified vector. Integer- based keys will also be returned as strings.

Public function SetUserData(const data: ICefv8Value): Boolean;

Sets the user data for this object and returns true (1) on success. Returns false (0) if this function is called incorrectly. This function can only be called on user created objects.

Public function GetUserData: ICefv8Value;

Returns the user data, if any, assigned to this object.

Public function GetExternallyAllocatedMemory: Integer;

Returns the amount of externally allocated memory registered for the object.

Public function AdjustExternallyAllocatedMemory(changeInBytes: Integer): Integer;

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 ICefv8Value 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 function returns the number of bytes associated with the object after the adjustment. This function can only be called on user created objects.

Public function GetArrayLength: Integer;

Returns the number of elements in the array.

Public function GetArrayBufferReleaseCallback: ICefv8ArrayBufferReleaseCallback;

Returns the ReleaseCallback object associated with the ArrayBuffer or NULL if the ArrayBuffer was not created with CreateArrayBuffer.

Public function NeuterArrayBuffer: boolean;

Prevent the ArrayBuffer from using it's memory block by setting the length to zero. This operation cannot be undone. If the ArrayBuffer was created with CreateArrayBuffer then ICefv8ArrayBufferReleaseCallback.ReleaseBuffer will be called to release the underlying buffer.

Public function GetArrayBufferByteLength: NativeUInt;

Returns the length (in bytes) of the ArrayBuffer.

Public function GetArrayBufferData: Pointer;

Returns a pointer to the beginning of the memory block for this ArrayBuffer backing store. The returned pointer is valid as long as the ICefv8value is alive.

Public function GetFunctionName: ustring;

Returns the function name.

Public function GetFunctionHandler: ICefv8Handler;

Returns the function handler or NULL if not a CEF-created function.

Public function ExecuteFunction(const obj: ICefv8Value; const arguments: TCefv8ValueArray): ICefv8Value;

Execute the function using the current V8 context. This function should only be called from within the scope of a ICefv8Handler or ICefV8Accessor callback, or in combination with calling enter() and exit() on a stored ICefv8Context reference. |object| is the receiver ('this' object) of the function. If |object| is NULL the current context's global object will be used. |arguments| is the list of arguments that will be passed to the function. Returns the function return value on success. Returns NULL if this function is called incorrectly or an exception is thrown.

Public function ExecuteFunctionWithContext(const context: ICefv8Context; const obj: ICefv8Value; const arguments: TCefv8ValueArray): ICefv8Value;

Execute the function using the specified V8 context. |object| is the receiver ('this' object) of the function. If |object| is NULL the specified context's global object will be used. |arguments| is the list of arguments that will be passed to the function. Returns the function return value on success. Returns NULL if this function is called incorrectly or an exception is thrown.

Public function ResolvePromise(const arg: ICefv8Value): boolean;

Resolve the Promise using the current V8 context. This function should only be called from within the scope of a ICefv8Handler or ICefV8Accessor callback, or in combination with calling enter() and exit() on a stored ICefv8Context reference. |arg| is the argument passed to the resolved promise. Returns true (1) on success. Returns false (0) if this function is called incorrectly or an exception is thrown.

Public function RejectPromise(const errorMsg: ustring): boolean;

Reject the Promise using the current V8 context. This function should only be called from within the scope of a ICefv8Handler or ICefV8Accessor callback, or in combination with calling enter() and exit() on a stored ICefv8Context reference. Returns true (1) on success. Returns false (0) if this function is called incorrectly or an exception is thrown.

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