cef/include/capi/cef_v8_capi.h

// Copyright (c) 2023 Marshall A. Greenblatt. All rights reserved.
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#ifndef CEF_INCLUDE_CAPI_CEF_V8_CAPI_H_
#define CEF_INCLUDE_CAPI_CEF_V8_CAPI_H_
#pragma once

#include "include/capi/cef_base_capi.h"
#include "include/capi/cef_browser_capi.h"
#include "include/capi/cef_frame_capi.h"
#include "include/capi/cef_task_capi.h"

#ifdef __cplusplus
extern "C" {
#endif

struct _cef_v8exception_t;
struct _cef_v8handler_t;
struct _cef_v8stack_frame_t;
struct _cef_v8value_t;

///
/// Structure representing a V8 context 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 cef_v8context_t::get_task_runner() function.
///
typedef struct _cef_v8context_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Returns the task runner associated with this context. V8 handles can only
  /// be accessed from the thread on which they are created. This function can
  /// be called on any render process thread.
  ///
  struct _cef_task_runner_t*(CEF_CALLBACK* get_task_runner)(
      struct _cef_v8context_t* self);

  ///
  /// 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).
  ///
  int(CEF_CALLBACK* is_valid)(struct _cef_v8context_t* self);

  ///
  /// Returns the browser for this context. This function will return an NULL
  /// reference for WebWorker contexts.
  ///
  struct _cef_browser_t*(CEF_CALLBACK* get_browser)(
      struct _cef_v8context_t* self);

  ///
  /// Returns the frame for this context. This function will return an NULL
  /// reference for WebWorker contexts.
  ///
  struct _cef_frame_t*(CEF_CALLBACK* get_frame)(struct _cef_v8context_t* self);

  ///
  /// Returns the global object for this context. The context must be entered
  /// before calling this function.
  ///
  struct _cef_v8value_t*(CEF_CALLBACK* get_global)(
      struct _cef_v8context_t* self);

  ///
  /// Enter this context. A context must be explicitly entered before creating a
  /// V8 Object, Array, Function or Date 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 (1)
  /// if the scope was entered successfully.
  ///
  int(CEF_CALLBACK* enter)(struct _cef_v8context_t* self);

  ///
  /// Exit this context. Call this function only after calling enter(). Returns
  /// true (1) if the scope was exited successfully.
  ///
  int(CEF_CALLBACK* exit)(struct _cef_v8context_t* self);

  ///
  /// Returns true (1) if this object is pointing to the same handle as |that|
  /// object.
  ///
  int(CEF_CALLBACK* is_same)(struct _cef_v8context_t* self,
                             struct _cef_v8context_t* that);

  ///
  /// Execute a string of JavaScript code in this V8 context. The |script_url|
  /// parameter is the URL where the script in question can be found, if any.
  /// The |start_line| parameter is the base line number to use for error
  /// reporting. On success |retval| will be set to the return value, if any,
  /// and the function will return true (1). On failure |exception| will be set
  /// to the exception, if any, and the function will return false (0).
  ///
  int(CEF_CALLBACK* eval)(struct _cef_v8context_t* self,
                          const cef_string_t* code,
                          const cef_string_t* script_url,
                          int start_line,
                          struct _cef_v8value_t** retval,
                          struct _cef_v8exception_t** exception);
} cef_v8context_t;

///
/// Returns the current (top) context object in the V8 context stack.
///
CEF_EXPORT cef_v8context_t* cef_v8context_get_current_context(void);

///
/// Returns the entered (bottom) context object in the V8 context stack.
///
CEF_EXPORT cef_v8context_t* cef_v8context_get_entered_context(void);

///
/// Returns true (1) if V8 is currently inside a context.
///
CEF_EXPORT int cef_v8context_in_context(void);

///
/// Structure that should be implemented to handle V8 function calls. The
/// functions of this structure will be called on the thread associated with the
/// V8 function.
///
typedef struct _cef_v8handler_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// 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 (1) if execution was handled.
  ///
  int(CEF_CALLBACK* execute)(struct _cef_v8handler_t* self,
                             const cef_string_t* name,
                             struct _cef_v8value_t* object,
                             size_t argumentsCount,
                             struct _cef_v8value_t* const* arguments,
                             struct _cef_v8value_t** retval,
                             cef_string_t* exception);
} cef_v8handler_t;

///
/// Structure that should be implemented to handle V8 accessor calls. Accessor
/// identifiers are registered by calling cef_v8value_t::set_value(). The
/// functions of this structure will be called on the thread associated with the
/// V8 accessor.
///
typedef struct _cef_v8accessor_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// 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 (1) if accessor retrieval was
  /// handled.
  ///
  int(CEF_CALLBACK* get)(struct _cef_v8accessor_t* self,
                         const cef_string_t* name,
                         struct _cef_v8value_t* object,
                         struct _cef_v8value_t** retval,
                         cef_string_t* exception);

  ///
  /// 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 (1) if accessor assignment was
  /// handled.
  ///
  int(CEF_CALLBACK* set)(struct _cef_v8accessor_t* self,
                         const cef_string_t* name,
                         struct _cef_v8value_t* object,
                         struct _cef_v8value_t* value,
                         cef_string_t* exception);
} cef_v8accessor_t;

///
/// Structure that should be implemented to handle V8 interceptor calls. The
/// functions of this structure will be called on the thread associated with the
/// V8 interceptor. Interceptor's named property handlers (with first argument
/// of type CefString) are called when object is indexed by string. Indexed
/// property handlers (with first argument of type int) are called when object
/// is indexed by integer.
///
typedef struct _cef_v8interceptor_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Handle retrieval of the interceptor value identified by |name|. |object|
  /// is the receiver ('this' object) of the interceptor. If retrieval succeeds,
  /// set |retval| to the return value. If the requested value does not exist,
  /// don't set either |retval| or |exception|. If retrieval fails, set
  /// |exception| to the exception that will be thrown. If the property has an
  /// associated accessor, it will be called only if you don't set |retval|.
  /// Return true (1) if interceptor retrieval was handled, false (0) otherwise.
  ///
  int(CEF_CALLBACK* get_byname)(struct _cef_v8interceptor_t* self,
                                const cef_string_t* name,
                                struct _cef_v8value_t* object,
                                struct _cef_v8value_t** retval,
                                cef_string_t* exception);

  ///
  /// Handle retrieval of the interceptor value identified by |index|. |object|
  /// is the receiver ('this' object) of the interceptor. If retrieval succeeds,
  /// set |retval| to the return value. If the requested value does not exist,
  /// don't set either |retval| or |exception|. If retrieval fails, set
  /// |exception| to the exception that will be thrown. Return true (1) if
  /// interceptor retrieval was handled, false (0) otherwise.
  ///
  int(CEF_CALLBACK* get_byindex)(struct _cef_v8interceptor_t* self,
                                 int index,
                                 struct _cef_v8value_t* object,
                                 struct _cef_v8value_t** retval,
                                 cef_string_t* exception);

  ///
  /// Handle assignment of the interceptor value identified by |name|. |object|
  /// is the receiver ('this' object) of the interceptor. |value| is the new
  /// value being assigned to the interceptor. If assignment fails, set
  /// |exception| to the exception that will be thrown. This setter will always
  /// be called, even when the property has an associated accessor. Return true
  /// (1) if interceptor assignment was handled, false (0) otherwise.
  ///
  int(CEF_CALLBACK* set_byname)(struct _cef_v8interceptor_t* self,
                                const cef_string_t* name,
                                struct _cef_v8value_t* object,
                                struct _cef_v8value_t* value,
                                cef_string_t* exception);

  ///
  /// Handle assignment of the interceptor value identified by |index|. |object|
  /// is the receiver ('this' object) of the interceptor. |value| is the new
  /// value being assigned to the interceptor. If assignment fails, set
  /// |exception| to the exception that will be thrown. Return true (1) if
  /// interceptor assignment was handled, false (0) otherwise.
  ///
  int(CEF_CALLBACK* set_byindex)(struct _cef_v8interceptor_t* self,
                                 int index,
                                 struct _cef_v8value_t* object,
                                 struct _cef_v8value_t* value,
                                 cef_string_t* exception);
} cef_v8interceptor_t;

///
/// Structure representing a V8 exception. The functions of this structure may
/// be called on any render process thread.
///
typedef struct _cef_v8exception_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Returns the exception message.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_message)(
      struct _cef_v8exception_t* self);

  ///
  /// Returns the line of source code that the exception occurred within.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_source_line)(
      struct _cef_v8exception_t* self);

  ///
  /// Returns the resource name for the script from where the function causing
  /// the error originates.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_script_resource_name)(
      struct _cef_v8exception_t* self);

  ///
  /// Returns the 1-based number of the line where the error occurred or 0 if
  /// the line number is unknown.
  ///
  int(CEF_CALLBACK* get_line_number)(struct _cef_v8exception_t* self);

  ///
  /// Returns the index within the script of the first character where the error
  /// occurred.
  ///
  int(CEF_CALLBACK* get_start_position)(struct _cef_v8exception_t* self);

  ///
  /// Returns the index within the script of the last character where the error
  /// occurred.
  ///
  int(CEF_CALLBACK* get_end_position)(struct _cef_v8exception_t* self);

  ///
  /// Returns the index within the line of the first character where the error
  /// occurred.
  ///
  int(CEF_CALLBACK* get_start_column)(struct _cef_v8exception_t* self);

  ///
  /// Returns the index within the line of the last character where the error
  /// occurred.
  ///
  int(CEF_CALLBACK* get_end_column)(struct _cef_v8exception_t* self);
} cef_v8exception_t;

///
/// Callback structure that is passed to cef_v8value_t::CreateArrayBuffer.
///
typedef struct _cef_v8array_buffer_release_callback_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// Called to release |buffer| when the ArrayBuffer JS object is garbage
  /// collected. |buffer| is the value that was passed to CreateArrayBuffer
  /// along with this object.
  ///
  void(CEF_CALLBACK* release_buffer)(
      struct _cef_v8array_buffer_release_callback_t* self,
      void* buffer);
} cef_v8array_buffer_release_callback_t;

///
/// Structure 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 cef_v8context_t::get_task_runner() function.
///
typedef struct _cef_v8value_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// 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).
  ///
  int(CEF_CALLBACK* is_valid)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is undefined.
  ///
  int(CEF_CALLBACK* is_undefined)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is null.
  ///
  int(CEF_CALLBACK* is_null)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is bool.
  ///
  int(CEF_CALLBACK* is_bool)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is int.
  ///
  int(CEF_CALLBACK* is_int)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is unsigned int.
  ///
  int(CEF_CALLBACK* is_uint)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is double.
  ///
  int(CEF_CALLBACK* is_double)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is Date.
  ///
  int(CEF_CALLBACK* is_date)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is string.
  ///
  int(CEF_CALLBACK* is_string)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is object.
  ///
  int(CEF_CALLBACK* is_object)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is array.
  ///
  int(CEF_CALLBACK* is_array)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is an ArrayBuffer.
  ///
  int(CEF_CALLBACK* is_array_buffer)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is function.
  ///
  int(CEF_CALLBACK* is_function)(struct _cef_v8value_t* self);

  ///
  /// True if the value type is a Promise.
  ///
  int(CEF_CALLBACK* is_promise)(struct _cef_v8value_t* self);

  ///
  /// Returns true (1) if this object is pointing to the same handle as |that|
  /// object.
  ///
  int(CEF_CALLBACK* is_same)(struct _cef_v8value_t* self,
                             struct _cef_v8value_t* that);

  ///
  /// Return a bool value.
  ///
  int(CEF_CALLBACK* get_bool_value)(struct _cef_v8value_t* self);

  ///
  /// Return an int value.
  ///
  int32(CEF_CALLBACK* get_int_value)(struct _cef_v8value_t* self);

  ///
  /// Return an unsigned int value.
  ///
  uint32(CEF_CALLBACK* get_uint_value)(struct _cef_v8value_t* self);

  ///
  /// Return a double value.
  ///
  double(CEF_CALLBACK* get_double_value)(struct _cef_v8value_t* self);

  ///
  /// Return a Date value.
  ///
  cef_basetime_t(CEF_CALLBACK* get_date_value)(struct _cef_v8value_t* self);

  ///
  /// Return a string value.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_string_value)(
      struct _cef_v8value_t* self);

  ///
  /// Returns true (1) if this is a user created object.
  ///
  int(CEF_CALLBACK* is_user_created)(struct _cef_v8value_t* self);

  ///
  /// 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.
  ///
  int(CEF_CALLBACK* has_exception)(struct _cef_v8value_t* self);

  ///
  /// Returns the exception resulting from the last function call. This
  /// attribute exists only in the scope of the current CEF value object.
  ///
  struct _cef_v8exception_t*(CEF_CALLBACK* get_exception)(
      struct _cef_v8value_t* self);

  ///
  /// Clears the last exception and returns true (1) on success.
  ///
  int(CEF_CALLBACK* clear_exception)(struct _cef_v8value_t* self);

  ///
  /// Returns true (1) if this object will re-throw future exceptions. This
  /// attribute exists only in the scope of the current CEF value object.
  ///
  int(CEF_CALLBACK* will_rethrow_exceptions)(struct _cef_v8value_t* self);

  ///
  /// 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.
  ///
  int(CEF_CALLBACK* set_rethrow_exceptions)(struct _cef_v8value_t* self,
                                            int rethrow);

  ///
  /// Returns true (1) if the object has a value with the specified identifier.
  ///
  int(CEF_CALLBACK* has_value_bykey)(struct _cef_v8value_t* self,
                                     const cef_string_t* key);

  ///
  /// Returns true (1) if the object has a value with the specified identifier.
  ///
  int(CEF_CALLBACK* has_value_byindex)(struct _cef_v8value_t* self, int index);

  ///
  /// 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.
  ///
  int(CEF_CALLBACK* delete_value_bykey)(struct _cef_v8value_t* self,
                                        const cef_string_t* key);

  ///
  /// 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.
  ///
  int(CEF_CALLBACK* delete_value_byindex)(struct _cef_v8value_t* self,
                                          int index);

  ///
  /// Returns the value with the specified identifier on success. Returns NULL
  /// if this function is called incorrectly or an exception is thrown.
  ///
  struct _cef_v8value_t*(CEF_CALLBACK* get_value_bykey)(
      struct _cef_v8value_t* self,
      const cef_string_t* key);

  ///
  /// Returns the value with the specified identifier on success. Returns NULL
  /// if this function is called incorrectly or an exception is thrown.
  ///
  struct _cef_v8value_t*(
      CEF_CALLBACK* get_value_byindex)(struct _cef_v8value_t* self, int index);

  ///
  /// 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.
  ///
  int(CEF_CALLBACK* set_value_bykey)(struct _cef_v8value_t* self,
                                     const cef_string_t* key,
                                     struct _cef_v8value_t* value,
                                     cef_v8_propertyattribute_t attribute);

  ///
  /// 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.
  ///
  int(CEF_CALLBACK* set_value_byindex)(struct _cef_v8value_t* self,
                                       int index,
                                       struct _cef_v8value_t* value);

  ///
  /// Registers an identifier and returns true (1) on success. Access to the
  /// identifier will be forwarded to the cef_v8accessor_t instance passed to
  /// cef_v8value_t::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.
  ///
  int(CEF_CALLBACK* set_value_byaccessor)(struct _cef_v8value_t* self,
                                          const cef_string_t* key,
                                          cef_v8_accesscontrol_t settings,
                                          cef_v8_propertyattribute_t attribute);

  ///
  /// Read the keys for the object's values into the specified vector. Integer-
  /// based keys will also be returned as strings.
  ///
  int(CEF_CALLBACK* get_keys)(struct _cef_v8value_t* self,
                              cef_string_list_t keys);

  ///
  /// 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.
  ///
  int(CEF_CALLBACK* set_user_data)(struct _cef_v8value_t* self,
                                   struct _cef_base_ref_counted_t* user_data);

  ///
  /// Returns the user data, if any, assigned to this object.
  ///
  struct _cef_base_ref_counted_t*(CEF_CALLBACK* get_user_data)(
      struct _cef_v8value_t* self);

  ///
  /// Returns the amount of externally allocated memory registered for the
  /// object.
  ///
  int(CEF_CALLBACK* get_externally_allocated_memory)(
      struct _cef_v8value_t* self);

  ///
  /// 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 cef_v8value_t 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.
  ///
  int(CEF_CALLBACK* adjust_externally_allocated_memory)(
      struct _cef_v8value_t* self,
      int change_in_bytes);

  ///
  /// Returns the number of elements in the array.
  ///
  int(CEF_CALLBACK* get_array_length)(struct _cef_v8value_t* self);

  ///
  /// Returns the ReleaseCallback object associated with the ArrayBuffer or NULL
  /// if the ArrayBuffer was not created with CreateArrayBuffer.
  ///
  struct _cef_v8array_buffer_release_callback_t*(
      CEF_CALLBACK* get_array_buffer_release_callback)(
      struct _cef_v8value_t* self);

  ///
  /// 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
  /// cef_v8array_buffer_release_callback_t::ReleaseBuffer will be called to
  /// release the underlying buffer.
  ///
  int(CEF_CALLBACK* neuter_array_buffer)(struct _cef_v8value_t* self);

  ///
  /// Returns the function name.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_function_name)(
      struct _cef_v8value_t* self);

  ///
  /// Returns the function handler or NULL if not a CEF-created function.
  ///
  struct _cef_v8handler_t*(CEF_CALLBACK* get_function_handler)(
      struct _cef_v8value_t* self);

  ///
  /// Execute the function using the current V8 context. This function should
  /// only be called from within the scope of a cef_v8handler_t or
  /// cef_v8accessor_t callback, or in combination with calling enter() and
  /// exit() on a stored cef_v8context_t 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.
  ///
  struct _cef_v8value_t*(CEF_CALLBACK* execute_function)(
      struct _cef_v8value_t* self,
      struct _cef_v8value_t* object,
      size_t argumentsCount,
      struct _cef_v8value_t* const* arguments);

  ///
  /// 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.
  ///
  struct _cef_v8value_t*(CEF_CALLBACK* execute_function_with_context)(
      struct _cef_v8value_t* self,
      struct _cef_v8context_t* context,
      struct _cef_v8value_t* object,
      size_t argumentsCount,
      struct _cef_v8value_t* const* arguments);

  ///
  /// Resolve the Promise using the current V8 context. This function should
  /// only be called from within the scope of a cef_v8handler_t or
  /// cef_v8accessor_t callback, or in combination with calling enter() and
  /// exit() on a stored cef_v8context_t 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.
  ///
  int(CEF_CALLBACK* resolve_promise)(struct _cef_v8value_t* self,
                                     struct _cef_v8value_t* arg);

  ///
  /// Reject the Promise using the current V8 context. This function should only
  /// be called from within the scope of a cef_v8handler_t or cef_v8accessor_t
  /// callback, or in combination with calling enter() and exit() on a stored
  /// cef_v8context_t reference. Returns true (1) on success. Returns false (0)
  /// if this function is called incorrectly or an exception is thrown.
  ///
  int(CEF_CALLBACK* reject_promise)(struct _cef_v8value_t* self,
                                    const cef_string_t* errorMsg);
} cef_v8value_t;

///
/// Create a new cef_v8value_t object of type undefined.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_undefined(void);

///
/// Create a new cef_v8value_t object of type null.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_null(void);

///
/// Create a new cef_v8value_t object of type bool.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_bool(int value);

///
/// Create a new cef_v8value_t object of type int.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_int(int32 value);

///
/// Create a new cef_v8value_t object of type unsigned int.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_uint(uint32 value);

///
/// Create a new cef_v8value_t object of type double.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_double(double value);

///
/// Create a new cef_v8value_t object of type Date. This function should only be
/// called from within the scope of a cef_render_process_handler_t,
/// cef_v8handler_t or cef_v8accessor_t callback, or in combination with calling
/// enter() and exit() on a stored cef_v8context_t reference.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_date(cef_basetime_t date);

///
/// Create a new cef_v8value_t object of type string.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_string(const cef_string_t* value);

///
/// Create a new cef_v8value_t object of type object with optional accessor
/// and/or interceptor. This function should only be called from within the
/// scope of a cef_render_process_handler_t, cef_v8handler_t or cef_v8accessor_t
/// callback, or in combination with calling enter() and exit() on a stored
/// cef_v8context_t reference.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_object(
    cef_v8accessor_t* accessor,
    cef_v8interceptor_t* interceptor);

///
/// Create a new cef_v8value_t object of type array with the specified |length|.
/// If |length| is negative the returned array will have length 0. This function
/// should only be called from within the scope of a
/// cef_render_process_handler_t, cef_v8handler_t or cef_v8accessor_t callback,
/// or in combination with calling enter() and exit() on a stored
/// cef_v8context_t reference.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_array(int length);

///
/// Create a new cef_v8value_t object of type ArrayBuffer which wraps the
/// provided |buffer| of size |length| bytes. The ArrayBuffer is externalized,
/// meaning that it does not own |buffer|. The caller is responsible for freeing
/// |buffer| when requested via a call to
/// cef_v8array_buffer_release_callback_t::ReleaseBuffer. This function should
/// only be called from within the scope of a cef_render_process_handler_t,
/// cef_v8handler_t or cef_v8accessor_t callback, or in combination with calling
/// enter() and exit() on a stored cef_v8context_t reference.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_array_buffer(
    void* buffer,
    size_t length,
    cef_v8array_buffer_release_callback_t* release_callback);

///
/// Create a new cef_v8value_t object of type function. This function should
/// only be called from within the scope of a cef_render_process_handler_t,
/// cef_v8handler_t or cef_v8accessor_t callback, or in combination with calling
/// enter() and exit() on a stored cef_v8context_t reference.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_function(const cef_string_t* name,
                                                      cef_v8handler_t* handler);

///
/// Create a new cef_v8value_t object of type Promise. This function should only
/// be called from within the scope of a cef_render_process_handler_t,
/// cef_v8handler_t or cef_v8accessor_t callback, or in combination with calling
/// enter() and exit() on a stored cef_v8context_t reference.
///
CEF_EXPORT cef_v8value_t* cef_v8value_create_promise(void);

///
/// Structure representing a V8 stack trace 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 cef_v8context_t::get_task_runner() function.
///
typedef struct _cef_v8stack_trace_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// 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).
  ///
  int(CEF_CALLBACK* is_valid)(struct _cef_v8stack_trace_t* self);

  ///
  /// Returns the number of stack frames.
  ///
  int(CEF_CALLBACK* get_frame_count)(struct _cef_v8stack_trace_t* self);

  ///
  /// Returns the stack frame at the specified 0-based index.
  ///
  struct _cef_v8stack_frame_t*(
      CEF_CALLBACK* get_frame)(struct _cef_v8stack_trace_t* self, int index);
} cef_v8stack_trace_t;

///
/// Returns the stack trace for the currently active context. |frame_limit| is
/// the maximum number of frames that will be captured.
///
CEF_EXPORT cef_v8stack_trace_t* cef_v8stack_trace_get_current(int frame_limit);

///
/// Structure representing a V8 stack frame 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 cef_v8context_t::get_task_runner() function.
///
typedef struct _cef_v8stack_frame_t {
  ///
  /// Base structure.
  ///
  cef_base_ref_counted_t base;

  ///
  /// 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).
  ///
  int(CEF_CALLBACK* is_valid)(struct _cef_v8stack_frame_t* self);

  ///
  /// Returns the name of the resource script that contains the function.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_script_name)(
      struct _cef_v8stack_frame_t* self);

  ///
  /// Returns the name of the resource script that contains the function or the
  /// sourceURL value if the script name is undefined and its source ends with a
  /// "//@ sourceURL=..." string.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_script_name_or_source_url)(
      struct _cef_v8stack_frame_t* self);

  ///
  /// Returns the name of the function.
  ///
  // The resulting string must be freed by calling cef_string_userfree_free().
  cef_string_userfree_t(CEF_CALLBACK* get_function_name)(
      struct _cef_v8stack_frame_t* self);

  ///
  /// Returns the 1-based line number for the function call or 0 if unknown.
  ///
  int(CEF_CALLBACK* get_line_number)(struct _cef_v8stack_frame_t* self);

  ///
  /// Returns the 1-based column offset on the line for the function call or 0
  /// if unknown.
  ///
  int(CEF_CALLBACK* get_column)(struct _cef_v8stack_frame_t* self);

  ///
  /// Returns true (1) if the function was compiled using eval().
  ///
  int(CEF_CALLBACK* is_eval)(struct _cef_v8stack_frame_t* self);

  ///
  /// Returns true (1) if the function was called as a constructor via "new".
  ///
  int(CEF_CALLBACK* is_constructor)(struct _cef_v8stack_frame_t* self);
} cef_v8stack_frame_t;

///
/// 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 only be called on the render process main 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_EXPORT int cef_register_extension(const cef_string_t* extension_name,
                                      const cef_string_t* javascript_code,
                                      cef_v8handler_t* handler);

#ifdef __cplusplus
}
#endif

#endif  // CEF_INCLUDE_CAPI_CEF_V8_CAPI_H_