midori/src/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>
#define G_OBJECT_NAME(object) G_OBJECT_CLASS_NAME (G_OBJECT_GET_CLASS (object))
// FIXME: Return a GValue
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);
}
return result;
}
gchar*
gjs_string_utf8 (JSStringRef js_string)
{
size_t size_utf8 = JSStringGetMaximumUTF8CStringSize (js_string);
gchar* string_utf8 = g_new (gchar, size_utf8);
JSStringGetUTF8CString (js_string, string_utf8, size_utf8);
return string_utf8;
}
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_properties;
GParamSpec** pspecs = g_object_class_list_properties (
G_OBJECT_GET_CLASS (object), &n_properties);
gint i;
for (i = 0; i < n_properties; i++)
{
const gchar* property = g_param_spec_get_name (pspecs[i]);
JSStringRef js_property = JSStringCreateWithUTF8CString (property);
JSPropertyNameAccumulatorAddName (js_properties, js_property);
JSStringRelease (js_property);
}
}
}
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_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_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 (object, JSValueMakeNull (js_context));
JSValueRef js_result = NULL;
gchar* property = gjs_string_utf8 (js_property);
GParamSpec* pspec = g_object_class_find_property (
G_OBJECT_GET_CLASS (object), property);
if (!pspec)
{
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 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 (object, false);
bool result = false;
gchar* property = gjs_string_utf8 (js_property);
GParamSpec* pspec = g_object_class_find_property (
G_OBJECT_GET_CLASS (object), property);
if (!pspec)
{
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 (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;
}
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);
g_return_val_if_fail (object, JSValueMakeNull (js_context));
if (!n_arguments)
{
gtk_widget_show (GTK_WIDGET (object));
}
else if (n_arguments == 1)
{
JSObjectRef js_arg1 = JSValueToObject (
js_context, js_arguments[0], NULL);
GObject* arg1 = JSObjectGetPrivate (js_arg1);
if (arg1)
gtk_container_add (GTK_CONTAINER (object), GTK_WIDGET (arg1));
}
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);
}
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);
if (instance && G_IS_OBJECT (instance))
{
// TODO: Add functions dynamically
/*if (GTK_IS_WIDGET (instance))
{
_js_object_add_function (js_context, js_object, "show");
}*/
}
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, &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;
}
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, namespace);
return js_module;
}
JSGlobalContextRef
gjs_global_context_new (void)
{
JSGlobalContextRef js_context = JSGlobalContextCreate (NULL);
JSObjectRef js_gjs = gjs_object_new (js_context, "GJS", NULL);
_js_object_set_property (js_context, JSContextGetGlobalObject (js_context),
"gjs", js_gjs);
JSObjectRef js_gtk = gjs_module_new (js_context, "Gtk");
_js_object_set_property (js_context, JSContextGetGlobalObject (js_context),
"Gtk", js_gtk);
return js_context;
}