Class

JavaScriptCoreContext

Description [src] 

class JavaScriptCore.Context : GObject.Object {
  parent: GObject,
  priv: JSCContextPrivate*
}

JSCContext represents a JavaScript execution context, where all operations take place and where the values will be associated.

When a new context is created, a global object is allocated and the built-in JavaScript objects (Object, Function, String, Array) are populated. You can execute JavaScript in the context by using jsc_context_evaluate() or jsc_context_evaluate_with_source_uri(). It’s also possible to register custom objects in the context with jsc_context_register_class().

Hierarchy

hierarchy this JSCContext ancestor_0 GObject ancestor_0--this

Ancestors

Constructors

jsc_context_new

Create a new JSCContext. The context is created in a new JSCVirtualMachine. Use jsc_context_new_with_virtual_machine() to create a new JSCContext in an existing JSCVirtualMachine.

jsc_context_new_with_virtual_machine

Create a new JSCContext in virtual_machine.

Functions

jsc_context_get_current

Get the JSCContext that is currently executing a function. This should only be called within a function or method callback, otherwise NULL will be returned.

Instance methods

jsc_context_check_syntax

Check the given code in context for syntax errors. The line_number is the starting line number in uri; the value is one-based so the first line is 1. uri and line_number are only used to fill the exception. In case of errors exception will be set to a new JSCException with the details. You can pass NULL to exception to ignore the error details.

jsc_context_clear_exception

Clear the uncaught exception in context if any.

jsc_context_evaluate

Evaluate code in context.

jsc_context_evaluate_in_object

Evaluate code and create an new object where symbols defined in code will be added as properties, instead of being added to context global object. The new object is returned as object parameter. Similar to how jsc_value_new_object() works, if object_instance is not NULL object_class must be provided too. The line_number is the starting line number in uri; the value is one-based so the first line is 1. uri and line_number will be shown in exceptions and they don’t affect the behavior of the script.

jsc_context_evaluate_with_source_uri

Evaluate code in context using uri as the source URI. The line_number is the starting line number in uri; the value is one-based so the first line is 1. uri and line_number will be shown in exceptions and they don’t affect the behavior of the script.

jsc_context_get_exception

Get the last unhandled exception thrown in context by API functions calls.

jsc_context_get_global_object

Get a JSCValue referencing the context global object.

jsc_context_get_value

Get a property of context global object with name.

jsc_context_get_virtual_machine

Get the JSCVirtualMachine where context was created.

jsc_context_pop_exception_handler

Remove the last JSCExceptionHandler previously pushed to context with jsc_context_push_exception_handler().

jsc_context_push_exception_handler

Push an exception handler in context. Whenever a JavaScript exception happens in the JSCContext, the given handler will be called. The default JSCExceptionHandler simply calls jsc_context_throw_exception() to throw the exception to the JSCContext. If you don’t want to catch the exception, but only get notified about it, call jsc_context_throw_exception() in handler like the default one does. The last exception handler pushed is the only one used by the JSCContext, use jsc_context_pop_exception_handler() to remove it and set the previous one. When handler is removed from the context, destroy_notify i called with user_data as parameter.

jsc_context_register_class

Register a custom class in context using the given name. If the new class inherits from another JSCClass, the parent should be passed as parent_class, otherwise NULL should be used. The optional vtable parameter allows to provide a custom implementation for handling the class, for example, to handle external properties not added to the prototype. When an instance of the JSCClass is cleared in the context, destroy_notify is called with the instance as parameter.

jsc_context_set_value

Set a property of context global object with name and value.

jsc_context_throw

Throw an exception to context using the given error message. The created JSCException can be retrieved with jsc_context_get_exception().

jsc_context_throw_exception

Throw exception to context.

jsc_context_throw_printf

Throw an exception to context using the given formatted string as error message. The created JSCException can be retrieved with jsc_context_get_exception().

jsc_context_throw_with_name

Throw an exception to context using the given error name and message. The created JSCException can be retrieved with jsc_context_get_exception().

jsc_context_throw_with_name_printf

Throw an exception to context using the given error name and the formatted string as error message. The created JSCException can be retrieved with jsc_context_get_exception().

Methods inherited from GObject (43)

Please see GObject for a full list of methods.

Properties

JavaScriptCore.Context:virtual-machine

The JSCVirtualMachine in which the context was created.

Signals

Signals inherited from GObject (1)
GObject.Object::notify

The notify signal is emitted on an object when one of its properties has its value set through g_object_set_property(), g_object_set(), et al.

Class structure 

struct JavaScriptCoreContextClass {
  GObjectClass parent_class;
  void (* _jsc_reserved0) (
void
  );
  void (* _jsc_reserved1) (
void
  );
  void (* _jsc_reserved2) (
void
  );
  void (* _jsc_reserved3) (
void
  );
  
}
No description available.
Class members
parent_class 
GObjectClass
  No description available.
_jsc_reserved0 
void (* _jsc_reserved0) (
void
  )
  No description available.
_jsc_reserved1 
void (* _jsc_reserved1) (
void
  )
  No description available.
_jsc_reserved2 
void (* _jsc_reserved2) (
void
  )
  No description available.
_jsc_reserved3 
void (* _jsc_reserved3) (
void
  )
  No description available.