#include <gmodule.h>
#include <glib/gi18n.h>
-#define G_OBJECT_NAME(object) G_OBJECT_CLASS_NAME (G_OBJECT_GET_CLASS (object))
+struct _GjsValue
+{
+ GObject parent_instance;
+
+ JSContextRef js_context;
+ JSValueRef js_value;
+ gchar* string;
+};
+
+G_DEFINE_TYPE (GjsValue, gjs_value, G_TYPE_OBJECT)
+
+static void
+gjs_value_finalize (GObject* object)
+{
+ GjsValue* value = GJS_VALUE (object);
+
+ g_free (value->string);
+
+ G_OBJECT_CLASS (gjs_value_parent_class)->finalize (object);
+}
+
+static void
+gjs_value_class_init (GjsValueClass* class)
+{
+ GObjectClass* gobject_class = G_OBJECT_CLASS (class);
+ gobject_class->finalize = gjs_value_finalize;
+}
+
+static void
+gjs_value_init (GjsValue* value)
+{
+ value->js_context = NULL;
+ value->js_value = NULL;
+ value->string = NULL;
+}
+
+/**
+ * gjs_value_new:
+ * @js_context: a #JSContextRef
+ * @js_value: a #JSValueRef or %NULL
+ *
+ * Creates a new #GjsValue for a #JsValueRef. If @js_value
+ * is %NULL, the new value represents the global object.
+ *
+ * Return value: a new #GjsValue
+ **/
+GjsValue*
+gjs_value_new (JSContextRef js_context,
+ JSValueRef js_value)
+{
+ GjsValue* value;
+
+ g_return_val_if_fail (js_context, NULL);
+
+ value = g_object_new (GJS_TYPE_VALUE, NULL);
+ value->js_context = js_context;
+ value->js_value = js_value ? js_value : JSContextGetGlobalObject (js_context);
+ return value;
+}
+
+/**
+ * gjs_value_is_valid:
+ * @value: a #GjsValue
+ *
+ * Determines whether the value is valid, with regard to
+ * its internal state. This is primarily useful for API
+ * to ensure that the value is in a defined condition.
+ *
+ * Return value: %TRUE if value is valid
+ **/
+gboolean
+gjs_value_is_valid (GjsValue* value)
+{
+ g_return_val_if_fail (GJS_IS_VALUE (value), FALSE);
+ g_return_val_if_fail (value->js_context, FALSE);
+ g_return_val_if_fail (value->js_value, FALSE);
+
+ return TRUE;
+}
+
+/**
+ * gjs_value_is_object:
+ * @value: a #GjsValue
+ *
+ * Determines whether the value is an object.
+ *
+ * Return value: %TRUE if value is an object
+ **/
+gboolean
+gjs_value_is_object (GjsValue* value)
+{
+ g_return_val_if_fail (gjs_value_is_valid (value), FALSE);
+
+ return JSValueIsObject (value->js_context, value->js_value) == true;
+}
+
+/**
+ * gjs_value_has_attribute:
+ * @value: a #GjsValue
+ * @name: the name of a attribute
+ *
+ * Determines whether the value has the specified attribute.
+ *
+ * This can only be used on object values.
+ *
+ * Return value: %TRUE if the specified attribute exists
+ **/
+gboolean
+gjs_value_has_attribute (GjsValue* value,
+ const gchar* name)
+{
+ JSObjectRef js_object;
+ JSStringRef js_name;
+ gboolean result;
+
+ g_return_val_if_fail (gjs_value_is_object (value), FALSE);
+ g_return_val_if_fail (name, FALSE);
+
+ js_object = JSValueToObject (value->js_context, value->js_value, NULL);
+ js_name = JSStringCreateWithUTF8CString (name);
+ result = JSObjectHasProperty (value->js_context, js_object, js_name) == true;
+ JSStringRelease (js_name);
+ return result;
+}
+
+/**
+ * gjs_value_get_attribute:
+ * @value: a #GjsValue
+ * @name: the name of a attribute
+ *
+ * Retrieves the specified attribute.
+ *
+ * This can only be used on object values.
+ *
+ * Return value: a new #GjsValue
+ **/
+GjsValue*
+gjs_value_get_attribute (GjsValue* value,
+ const gchar* name)
+{
+ JSObjectRef js_object;
+ JSStringRef js_name;
+ JSValueRef js_value;
+
+ g_return_val_if_fail (gjs_value_has_attribute (value, name), NULL);
+
+ js_object = JSValueToObject (value->js_context, value->js_value, NULL);
+ js_name = JSStringCreateWithUTF8CString (name);
+ js_value = JSObjectGetProperty (value->js_context, js_object, js_name, NULL);
+ JSStringRelease (js_name);
+
+ return gjs_value_new (value->js_context, js_value);
+}
+
+/**
+ * gjs_value_get_string:
+ * @value: a #GjsValue
+ *
+ * Retrieves the value in the form of a string.
+ *
+ * This can only be used on object values.
+ *
+ * Note: The string won't reflect changes to the value.
+ *
+ * Return value: the value as a string
+ **/
+const gchar*
+gjs_value_get_string (GjsValue* value)
+{
+ JSStringRef js_string;
+
+ g_return_val_if_fail (gjs_value_is_valid (value), NULL);
+
+ if (value->string)
+ return value->string;
+
+ js_string = JSValueToStringCopy (value->js_context, value->js_value, NULL);
+ value->string = gjs_string_utf8 (js_string);
+ JSStringRelease (js_string);
+ return value->string;
+}
+
+void
+gjs_value_weak_notify_cb (GjsValue* attribute,
+ GjsValue* value)
+{
+ g_object_unref (attribute);
+}
+
+/**
+ * gjs_value_get_attribute_string:
+ * @value: a #GjsValue
+ * @name: the name of a attribute
+ *
+ * Retrieves the attribute of the value in the form of a string.
+ *
+ * This can only be used on object values.
+ *
+ * Note: The string won't reflect changes to the value.
+ *
+ * Return value: the value as a string
+ **/
+const gchar*
+gjs_value_get_attribute_string (GjsValue* value,
+ const gchar* name)
+{
+ GjsValue* attribute;
+
+ g_return_val_if_fail (gjs_value_has_attribute (value, name), NULL);
+
+ attribute = gjs_value_get_attribute (value, name);
+ g_object_weak_ref (G_OBJECT (value),
+ (GWeakNotify)gjs_value_weak_notify_cb, attribute);
+ return gjs_value_get_string (attribute);
+}
+
+/**
+ * gjs_value_foreach:
+ * @value: a #GjsValue
+ * @callback: a callback
+ * @user_data: user data
+ *
+ * Runs the specified callback for each attribute of the value.
+ *
+ * This can only be used on object values.
+ **/
+void
+gjs_value_foreach (GjsValue* value,
+ GjsCallback callback,
+ gpointer user_data)
+{
+ JSObjectRef js_object;
+ JSPropertyNameArrayRef js_properties;
+ size_t n_properties;
+ guint i;
+ JSStringRef js_property;
+ gchar* property;
+ GjsValue* attribute;
+
+ g_return_if_fail (gjs_value_is_object (value));
+
+ js_object = JSValueToObject (value->js_context, value->js_value, NULL);
+ js_properties = JSObjectCopyPropertyNames (value->js_context, js_object);
+ n_properties = JSPropertyNameArrayGetCount (js_properties);
+ for (i = 0; i < n_properties; i++)
+ {
+ js_property = JSPropertyNameArrayGetNameAtIndex (js_properties, i);
+ property = gjs_string_utf8 (js_property);
+ if (gjs_value_has_attribute (value, property))
+ {
+ attribute = gjs_value_get_attribute (value, property);
+ callback (attribute, user_data);
+ g_object_unref (attribute);
+ }
+ g_free (property);
+ JSStringRelease (js_property);
+ }
+ JSPropertyNameArrayRelease (js_properties);
+}
+
+/**
+ * gjs_value_get_by_name:
+ * @value: a #GjsValue
+ * @name: the name of an object
+ *
+ * Retrieves a value for the specified name,
+ * for example "document" or "document.body".
+ *
+ * Return value: the value, or %NULL
+ **/
+GjsValue*
+gjs_value_get_by_name (GjsValue* value,
+ const gchar* name)
+{
+ gchar* script;
+ GjsValue* elements;
+
+ g_return_val_if_fail (gjs_value_is_valid (value), NULL);
+ g_return_val_if_fail (name, NULL);
+
+ script = g_strdup_printf ("return %s;", name);
+ elements = gjs_value_execute (value, script, NULL);
+ g_free (script);
+ return elements;
+}
+
+/**
+ * gjs_value_get_elements_by_tag_name:
+ * @value: a #GjsValue
+ * @name: the tag name
+ *
+ * Retrieves all children with the specified tag name.
+ *
+ * This can only be used on object values.
+ *
+ * Return value: all matching elements
+ **/
+GjsValue*
+gjs_value_get_elements_by_tag_name (GjsValue* value,
+ const gchar* name)
+{
+ gchar* script;
+ GjsValue* elements;
+
+ g_return_val_if_fail (gjs_value_is_valid (value), NULL);
+ g_return_val_if_fail (name, NULL);
+
+ script = g_strdup_printf ("return this.getElementsByTagName ('%s');", name);
+ elements = gjs_value_execute (value, script, NULL);
+ g_free (script);
+ return elements;
+}
+
+/**
+ * gjs_value_execute:
+ * @value: a #GjsValue
+ * @script: javascript code
+ *
+ * Executes a piece of javascript code. If @value is an object
+ * it can be referred to as 'this' in the code.
+ *
+ * A 'return' statement in the code will yield the result to
+ * the return value of this function.
+ *
+ * Return value: the return value, or %NULL
+ **/
+GjsValue*
+gjs_value_execute (GjsValue* value,
+ const gchar* script,
+ gchar** exception)
+{
+ JSStringRef js_script;
+ JSObjectRef js_function;
+ JSObjectRef js_object;
+ JSValueRef js_exception;
+ JSValueRef js_value;
+ JSStringRef js_message;
+
+ g_return_val_if_fail (gjs_value_is_valid (value), FALSE);
+ g_return_val_if_fail (script, FALSE);
+
+ js_script = JSStringCreateWithUTF8CString (script);
+ js_function = JSObjectMakeFunction (value->js_context, NULL, 0, NULL,
+ js_script, NULL, 1, NULL);
+ JSStringRelease (js_script);
+ js_object = JSValueToObject (value->js_context, value->js_value, NULL);
+ js_exception = NULL;
+ js_value = JSObjectCallAsFunction (value->js_context, js_function,
+ js_object, 0, NULL, &js_exception);
+ if (!js_value && exception)
+ {
+ js_message = JSValueToStringCopy (value->js_context, js_exception, NULL);
+ *exception = gjs_string_utf8 (js_message);
+ JSStringRelease (js_message);
+ return NULL;
+ }
+ return gjs_value_new (value->js_context, js_value);
+}
JSValueRef
gjs_script_eval (JSContextRef js_context,
gchar*
gjs_string_utf8 (JSStringRef js_string)
{
- size_t size_utf8 = JSStringGetMaximumUTF8CStringSize (js_string);
- gchar* string_utf8 = g_new (gchar, size_utf8);
+ size_t size_utf8;
+ gchar* string_utf8;
+
+ g_return_val_if_fail (js_string, NULL);
+
+ size_utf8 = JSStringGetMaximumUTF8CStringSize (js_string);
+ string_utf8 = g_new (gchar, size_utf8);
JSStringGetUTF8CString (js_string, string_utf8, size_utf8);
return string_utf8;
}
+#define G_OBJECT_NAME(object) G_OBJECT_CLASS_NAME (G_OBJECT_GET_CLASS (object))
+
static void
_js_class_get_property_names_cb (JSContextRef js_context,
JSObjectRef js_object,
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