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midori/midori/gjs.c

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/*
Copyright (C) 2008 Christian Dywan <christian@twotoasts.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
See the file COPYING for the full license text.
*/
#include "gjs.h"
#include <gmodule.h>
#include <glib/gi18n.h>
/* Needed for versioning macros */
#include <webkit/webkit.h>
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;
}
static 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_get_nth_attribute:
* @value: a #GjsValue
* @n: an index
*
* Retrieves the indiced attribute at the specified
* position. This is particularly faster than looking
* up attributes by name.
*
* This can only be used on object values.
*
* Return value: a new #GjsValue, or %NULL
**/
GjsValue*
gjs_value_get_nth_attribute (GjsValue* value,
guint n)
{
JSObjectRef js_object;
JSValueRef js_value;
g_return_val_if_fail (gjs_value_is_object (value), NULL);
js_object = JSValueToObject (value->js_context, value->js_value, NULL);
js_value = JSObjectGetPropertyAtIndex (value->js_context, js_object, n, NULL);
if (JSValueIsUndefined (value->js_context, js_value))
return NULL;
return gjs_value_new (value->js_context, js_value);
}
/**
* gjs_value_foreach:
* @value: a #GjsValue
* @callback: a callback
* @user_data: user data
*
* Calls the specified callback for each indiced attribute.
* This is a particularly fast way of looping through the
* elements of an array.
*
* This can only be used on object values.
**/
void
gjs_value_foreach (GjsValue* value,
GjsCallback callback,
gpointer user_data)
{
guint i;
GjsValue* attribute;
g_return_if_fail (gjs_value_is_object (value));
i = 0;
do
{
attribute = gjs_value_get_nth_attribute (value, i);
if (attribute)
{
callback (attribute, user_data);
g_object_unref (attribute);
}
i++;
}
while (attribute);
}
/**
* gjs_value_forall:
* @value: a #GjsValue
* @callback: a callback
* @user_data: user data
*
* Calls the specified callback for each attribute.
*
* This can only be used on object values.
**/
void
gjs_value_forall (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_object (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,
const gchar* script,
gchar** exception)
{
g_return_val_if_fail (js_context, FALSE);
g_return_val_if_fail (script, FALSE);
JSStringRef js_script = JSStringCreateWithUTF8CString (script);
JSValueRef js_exception = NULL;
JSValueRef js_value = JSEvaluateScript (js_context, js_script,
JSContextGetGlobalObject (js_context), NULL, 0, &js_exception);
if (!js_value && exception)
{
JSStringRef js_message = JSValueToStringCopy (js_context,
js_exception, NULL);
*exception = gjs_string_utf8 (js_message);
JSStringRelease (js_message);
js_value = JSValueMakeNull (js_context);
}
JSStringRelease (js_script);
return js_value;
}
gboolean
gjs_script_check_syntax (JSContextRef js_context,
const gchar* script,
gchar** exception)
{
g_return_val_if_fail (js_context, FALSE);
g_return_val_if_fail (script, FALSE);
JSStringRef js_script = JSStringCreateWithUTF8CString (script);
JSValueRef js_exception = NULL;
bool result = JSCheckScriptSyntax (js_context, js_script, NULL,
0, &js_exception);
if (!result && exception)
{
JSStringRef js_message = JSValueToStringCopy (js_context,
js_exception, NULL);
*exception = gjs_string_utf8 (js_message);
JSStringRelease (js_message);
}
JSStringRelease (js_script);
return result ? TRUE : FALSE;
}
gboolean
gjs_script_from_file (JSContextRef js_context,
const gchar* filename,
gchar** exception)
{
g_return_val_if_fail (js_context, FALSE);
g_return_val_if_fail (filename, FALSE);
gboolean result = FALSE;
gchar* script;
GError* error = NULL;
if (g_file_get_contents (filename, &script, NULL, &error))
{
if (gjs_script_eval (js_context, script, exception))
result = TRUE;
g_free (script);
}
else if (error)
{
*exception = g_strdup (error->message);
g_error_free (error);
}
else
*exception = g_strdup (_("An unknown error occured."));
return result;
}
gchar*
gjs_string_utf8 (JSStringRef js_string)
{
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,
JSPropertyNameAccumulatorRef js_properties)
{
GObject* object = JSObjectGetPrivate (js_object);
if (object)
{
guint n;
GParamSpec** pspecs = g_object_class_list_properties (
G_OBJECT_GET_CLASS (object), &n);
guint i;
for (i = 0; i < n; i++)
{
const gchar* property = g_param_spec_get_name (pspecs[i]);
JSStringRef js_property = JSStringCreateWithUTF8CString (property);
JSPropertyNameAccumulatorAddName (js_properties, js_property);
JSStringRelease (js_property);
}
GType type = G_OBJECT_TYPE (object);
do
{
guint* signals = g_signal_list_ids (type, &n);
for (i = 0; i < n; i++)
{
const gchar* signal_ = g_signal_name (signals[i]);
JSStringRef js_signal = JSStringCreateWithUTF8CString (signal_);
JSPropertyNameAccumulatorAddName (js_properties, js_signal);
JSStringRelease (js_signal);
}
type = g_type_parent (type);
}
while (type);
}
}
static bool
_js_class_has_property_cb (JSContextRef js_context,
JSObjectRef js_object,
JSStringRef js_property)
{
bool result = false;
gchar* property = gjs_string_utf8 (js_property);
GObject* object = JSObjectGetPrivate (js_object);
if (object)
{
if (g_signal_lookup (property, G_OBJECT_TYPE (object)) ||
g_object_class_find_property (G_OBJECT_GET_CLASS (object), property))
result = true;
}
else if (js_object == JSContextGetGlobalObject (js_context))
{
GType type = g_type_from_name (property);
result = type ? type : false;
}
g_free (property);
return result;
}
static void
_js_object_set_property (JSContextRef js_context,
JSObjectRef js_object,
const gchar* name,
JSValueRef js_value)
{
JSStringRef js_name = JSStringCreateWithUTF8CString (name);
JSObjectSetProperty (js_context, js_object, js_name, js_value,
kJSPropertyAttributeNone, NULL);
JSStringRelease (js_name);
}
static JSValueRef
_js_object_call_as_function_cb (JSContextRef js_context,
JSObjectRef js_function,
JSObjectRef js_this,
size_t n_arguments,
const JSValueRef js_arguments[],
JSValueRef* js_exception)
{
GObject* object = JSObjectGetPrivate (js_this);
const gchar* function = JSObjectGetPrivate (js_function);
g_return_val_if_fail (G_IS_OBJECT (object), JSValueMakeNull (js_context));
g_return_val_if_fail (function, JSValueMakeNull (js_context));
guint signal_id = g_signal_lookup (function, G_OBJECT_TYPE (object));
GSignalQuery query;
g_signal_query (signal_id, &query);
GValue* values = g_new0 (GValue, n_arguments + 1);
g_value_init (&values[0], G_OBJECT_TYPE (object));
g_value_set_instance (&values[0], object);
guint i;
for (i = 0; i < n_arguments; i++)
{
GValue value = {0, };
GType gtype;
switch (JSValueGetType (js_context, js_arguments[i]))
{
case kJSTypeBoolean:
gtype = G_TYPE_BOOLEAN;
g_value_init (&value, gtype);
g_value_set_boolean (&value,
JSValueToBoolean (js_context, js_arguments[i]) ? TRUE : FALSE);
break;
case kJSTypeNumber:
gtype = G_TYPE_DOUBLE;
g_value_init (&value, gtype);
g_value_set_double (&value,
JSValueToNumber (js_context, js_arguments[i], NULL));
break;
case kJSTypeString:
gtype = G_TYPE_STRING;
g_value_init (&value, gtype);
JSStringRef js_string = JSValueToStringCopy (js_context,
js_arguments[i], NULL);
gchar* string = gjs_string_utf8 (js_string);
g_value_set_string (&value, string);
g_free (string);
JSStringRelease (js_string);
break;
case kJSTypeObject:
gtype = G_TYPE_OBJECT;
g_value_init (&value, gtype);
JSObjectRef js_object = JSValueToObject (js_context,
js_arguments[i], NULL);
GObject* object_value = JSObjectGetPrivate (js_object);
g_value_set_object (&value, object_value);
break;
case kJSTypeUndefined:
case kJSTypeNull:
default:
gtype = G_TYPE_NONE;
g_value_init (&value, gtype);
}
g_value_init (&values[i + 1], gtype);
if (query.n_params >= i
&& g_value_type_compatible (gtype, query.param_types[i]))
/* && g_value_type_transformable (gtype, query.param_types[i]) */
g_value_copy (&value, &values[i + 1]);
/* g_value_transform (&value, &values[i + 1]); */
else
{
gchar* value_type = g_strdup_value_contents (&value);
/* FIXME: exception */
g_print ("wrong value, expected %s\n", value_type);
g_free (value_type);
}
g_value_unset (&value);
}
GValue return_value = {0, };
if (query.return_type != G_TYPE_NONE)
g_value_init (&return_value, query.return_type);
g_signal_emitv (values, signal_id, 0, &return_value);
for (i = 0; i < n_arguments; i++)
g_value_unset (&values[i]);
/* FIXME: return value */
return JSValueMakeUndefined (js_context);
}
/*static void
_js_object_add_function (JSContextRef js_context,
JSObjectRef js_object,
const gchar* func)
{
JSStringRef js_func = JSStringCreateWithUTF8CString (func);
JSObjectRef js_function = JSObjectMakeFunctionWithCallback (
js_context, js_func, _js_object_call_as_function_cb);
JSStringRelease (js_func);
_js_object_set_property (js_context, js_object, func, js_function);
}*/
static JSValueRef
_js_class_get_property_cb (JSContextRef js_context,
JSObjectRef js_object,
JSStringRef js_property,
JSValueRef* js_exception)
{
GObject* object = JSObjectGetPrivate (js_object);
g_return_val_if_fail (G_IS_OBJECT (object), JSValueMakeNull (js_context));
JSValueRef js_result = NULL;
gchar* property = gjs_string_utf8 (js_property);
guint signal_id;
GParamSpec* pspec;
if ((signal_id = g_signal_lookup (property, G_OBJECT_TYPE (object))))
{
GSignalQuery query;
g_signal_query (signal_id, &query);
if (query.signal_flags & G_SIGNAL_ACTION)
{
/* We can't use JSObjectMakeFunctionWithCallback
because it doesn't allocate private data */
JSClassDefinition js_class_def = kJSClassDefinitionEmpty;
js_class_def.className = g_strdup (property);
js_class_def.callAsFunction = _js_object_call_as_function_cb;
JSClassRef js_class = JSClassCreate (&js_class_def);
JSObjectRef js_function = JSObjectMake (js_context,
js_class, property);
return js_function;
}
g_free (property);
return JSValueMakeNull (js_context);
}
else if (!(pspec = g_object_class_find_property (
G_OBJECT_GET_CLASS (object), property)))
{
gchar* message = g_strdup_printf (_("%s has no property '%s'"),
G_OBJECT_NAME (object), property);
JSStringRef js_message = JSStringCreateWithUTF8CString (message);
*js_exception = JSValueMakeString (js_context, js_message);
JSStringRelease (js_message);
g_free (message);
g_free (property);
return JSValueMakeNull (js_context);
}
if (!(pspec->flags & G_PARAM_READABLE))
{
g_free (property);
return JSValueMakeUndefined (js_context);
}
GType type = G_PARAM_SPEC_TYPE (pspec);
if (type == G_TYPE_PARAM_STRING)
{
gchar* value;
g_object_get (object, property, &value, NULL);
if (value)
{
JSStringRef js_string = JSStringCreateWithUTF8CString (value);
js_result = JSValueMakeString (js_context, js_string);
}
}
else if (type == G_TYPE_PARAM_INT || type == G_TYPE_PARAM_UINT)
{
gint value;
g_object_get (object, property, &value, NULL);
js_result = JSValueMakeNumber (js_context, value);
}
else if (type == G_TYPE_PARAM_BOOLEAN)
{
gboolean value;
g_object_get (object, property, &value, NULL);
js_result = JSValueMakeBoolean (js_context, value ? true : false);
}
else if (type == G_TYPE_PARAM_OBJECT)
{
GObject* value;
g_object_get (object, property, &value, NULL);
if (value)
js_result = gjs_object_new (js_context,
G_OBJECT_NAME (value), value);
}
else if (type == G_TYPE_PARAM_ENUM)
{
gint value;
g_object_get (object, property, &value, NULL);
js_result = JSValueMakeNumber (js_context, value);
}
else
js_result = JSValueMakeUndefined (js_context);
g_free (property);
return js_result ? js_result : JSValueMakeNull (js_context);
}
static void
_js_class_signal_callback (GObject* object, ...)
{
/* FIXME: Support arbitrary signatures */
/* FIXME: Support arbitrary return values */
}
static bool
_js_class_set_property_cb (JSContextRef js_context,
JSObjectRef js_object,
JSStringRef js_property,
JSValueRef js_value,
JSValueRef* js_exception)
{
GObject* object = JSObjectGetPrivate (js_object);
g_return_val_if_fail (G_IS_OBJECT (object), false);
bool result = false;
gchar* property = gjs_string_utf8 (js_property);
guint signal_id;
GParamSpec* pspec;
if ((signal_id = g_signal_lookup (property, G_OBJECT_TYPE (object))))
{
g_signal_connect (object, property,
G_CALLBACK (_js_class_signal_callback), (gpointer)js_value);
g_free (property);
return true;
}
else if (!(pspec = g_object_class_find_property (
G_OBJECT_GET_CLASS (object), property)))
{
gchar* message = g_strdup_printf (_("%s has no property '%s'"),
G_OBJECT_NAME (object), property);
JSStringRef js_message = JSStringCreateWithUTF8CString (message);
*js_exception = JSValueMakeString (js_context, js_message);
JSStringRelease (js_message);
g_free (message);
g_free (property);
return false;
}
if (!(pspec->flags & G_PARAM_WRITABLE))
{
g_free (property);
return false;
}
GType type = G_PARAM_SPEC_TYPE (pspec);
if (type == G_TYPE_PARAM_STRING)
{
JSStringRef js_string_value = JSValueToStringCopy (js_context,
js_value, js_exception);
if (js_string_value)
{
gchar* string_value = gjs_string_utf8 (js_string_value);
g_object_set (object, property, string_value, NULL);
g_free (string_value);
}
}
else if (type == G_TYPE_PARAM_INT || type == G_TYPE_PARAM_UINT)
{
int value = JSValueToNumber (js_context, js_value,
js_exception);
g_object_set (object, property, value, NULL);
}
else if (type == G_TYPE_PARAM_BOOLEAN)
{
bool value = JSValueToBoolean (js_context, js_value);
g_object_set (object, property, value ? TRUE : FALSE, NULL);
}
else if (type == G_TYPE_PARAM_OBJECT)
{
JSObjectRef js_object_value = JSValueToObject (
js_context, js_value, NULL);
GObject* object_value = JSObjectGetPrivate (js_object_value);
if (G_IS_OBJECT (object_value))
g_object_set (object, property, object_value, NULL);
else
{
gchar* message = g_strdup_printf (_("%s cannot be assigned to %s.%s"),
"[object]", G_OBJECT_NAME (object), property);
JSStringRef js_message = JSStringCreateWithUTF8CString (message);
*js_exception = JSValueMakeString (js_context, js_message);
JSStringRelease (js_message);
g_free (message);
}
}
else
{
gchar* message = g_strdup_printf (_("%s.%s cannot be accessed"),
G_OBJECT_NAME (object), property);
JSStringRef js_message = JSStringCreateWithUTF8CString (message);
*js_exception = JSValueMakeString (js_context, js_message);
JSStringRelease (js_message);
g_free (message);
}
g_free (property);
return result;
}
JSObjectRef
gjs_object_new (JSContextRef js_context,
const gchar* name,
gpointer instance)
{
g_return_val_if_fail (js_context, NULL);
g_return_val_if_fail (name, NULL);
JSClassDefinition js_class_def = kJSClassDefinitionEmpty;
js_class_def.className = g_strdup (name);
js_class_def.getPropertyNames = _js_class_get_property_names_cb;
js_class_def.hasProperty = _js_class_has_property_cb;
js_class_def.getProperty = _js_class_get_property_cb;
js_class_def.setProperty = _js_class_set_property_cb;
JSClassRef js_class = JSClassCreate (&js_class_def);
JSObjectRef js_object = JSObjectMake (js_context, js_class, instance);
return js_object;
}
static JSObjectRef
_js_object_call_as_constructor_cb (JSContextRef js_context,
JSObjectRef js_object,
size_t n_arguments,
const JSValueRef js_arguments[],
JSValueRef* js_exception)
{
const gchar* type_name = JSObjectGetPrivate (js_object);
g_return_val_if_fail (type_name, NULL);
GType type = g_type_from_name (type_name);
if (type)
return gjs_object_new (js_context, type_name, g_object_new (type, NULL));
return NULL;
}
static bool
_js_module_has_property_cb (JSContextRef js_context,
JSObjectRef js_object,
JSStringRef js_property)
{
const gchar* namespace = JSObjectGetPrivate (js_object);
g_return_val_if_fail (namespace, false);
gchar* property = gjs_string_utf8 (js_property);
gchar* type_name = g_strdup_printf ("%s%s", namespace, property);
GType type = g_type_from_name (type_name);
if (!type)
{
GModule* module = g_module_open (NULL,
G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
typedef GType (*gjs_get_type_func)(void);
/* FIXME: Insert a space between each capital letter */
gchar* type_func_name = g_strdup_printf ("%s_%s_get_type",
namespace, property);
gchar* type_func_name_small = g_utf8_strdown (type_func_name, -1);
gjs_get_type_func type_func;
if (g_module_symbol (module,
(const gchar*)type_func_name_small, (gpointer*)&type_func))
{
type = type_func ();
g_type_class_peek (type);
}
g_free (type_func_name_small);
g_free (type_func_name);
g_module_close (module);
}
bool result = type ? true : false;
g_free (type_name);
g_free (property);
return result;
}
static JSValueRef
_js_module_get_property_cb (JSContextRef js_context,
JSObjectRef js_object,
JSStringRef js_property,
JSValueRef* js_exception)
{
const gchar* namespace = JSObjectGetPrivate (js_object);
g_return_val_if_fail (namespace, JSValueMakeNull (js_context));
gchar* property = gjs_string_utf8 (js_property);
gchar* type_name = g_strdup_printf ("%s%s", namespace, property);
GType type = g_type_from_name (type_name);
JSValueRef result;
if (type)
{
JSClassDefinition js_class_def = kJSClassDefinitionEmpty;
js_class_def.className = g_strdup (type_name);
js_class_def.callAsConstructor = _js_object_call_as_constructor_cb;
JSClassRef js_class = JSClassCreate (&js_class_def);
result = JSObjectMake (js_context, js_class, type_name);
}
else
{
result = JSValueMakeNull (js_context);
g_free (type_name);
}
g_free (property);
return result;
}
static JSObjectRef
gjs_module_new (JSContextRef js_context,
const gchar* namespace)
{
g_return_val_if_fail (js_context, NULL);
g_return_val_if_fail (namespace, NULL);
JSClassDefinition js_class_def = kJSClassDefinitionEmpty;
js_class_def.className = g_strdup (namespace);
js_class_def.hasProperty = _js_module_has_property_cb;
js_class_def.getProperty = _js_module_get_property_cb;
JSClassRef js_class = JSClassCreate (&js_class_def);
JSObjectRef js_module = JSObjectMake (js_context, js_class,
(gpointer)namespace);
return js_module;
}
JSGlobalContextRef
gjs_global_context_new (void)
{
#ifdef WEBKIT_CHECK_VERSION
#if WEBKIT_CHECK_VERSION (1, 0, 3)
#define HAVE_JSCONTEXTGROUP 1
#endif
#endif
#if HAVE_JSCONTEXTGROUP
JSGlobalContextRef js_context = JSGlobalContextCreateInGroup (NULL, NULL);
#else
JSGlobalContextRef js_context = JSGlobalContextCreate (NULL);
#endif
JSObjectRef js_object = gjs_object_new (js_context, "GJS", NULL);
_js_object_set_property (js_context, JSContextGetGlobalObject (js_context),
"gjs", js_object);
js_object = gjs_module_new (js_context, "Gtk");
_js_object_set_property (js_context, JSContextGetGlobalObject (js_context),
"Gtk", js_object);
js_object = gjs_module_new (js_context, "WebKit");
_js_object_set_property (js_context, JSContextGetGlobalObject (js_context),
"WebKit", js_object);
js_object = gjs_module_new (js_context, "Midori");
_js_object_set_property (js_context, JSContextGetGlobalObject (js_context),
"Midori", js_object);
return js_context;
}
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