498 lines
17 KiB
C
498 lines
17 KiB
C
/*
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Copyright (C) 2008 Christian Dywan <christian@twotoasts.de>
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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See the file COPYING for the full license text.
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*/
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#include "gjs.h"
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#include <gmodule.h>
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#include <glib/gi18n.h>
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#define G_OBJECT_NAME(object) G_OBJECT_CLASS_NAME (G_OBJECT_GET_CLASS (object))
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// FIXME: Return a GValue
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JSValueRef
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gjs_script_eval (JSContextRef js_context,
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const gchar* script,
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gchar** exception)
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{
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g_return_val_if_fail (js_context, FALSE);
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g_return_val_if_fail (script, FALSE);
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JSStringRef js_script = JSStringCreateWithUTF8CString (script);
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JSValueRef js_exception = NULL;
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JSValueRef js_value = JSEvaluateScript (js_context, js_script,
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JSContextGetGlobalObject (js_context), NULL, 0, &js_exception);
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if (!js_value && exception)
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{
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JSStringRef js_message = JSValueToStringCopy (js_context,
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js_exception, NULL);
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*exception = gjs_string_utf8 (js_message);
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JSStringRelease (js_message);
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js_value = JSValueMakeNull (js_context);
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}
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JSStringRelease (js_script);
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return js_value;
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}
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gboolean
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gjs_script_check_syntax (JSContextRef js_context,
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const gchar* script,
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gchar** exception)
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{
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g_return_val_if_fail (js_context, FALSE);
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g_return_val_if_fail (script, FALSE);
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JSStringRef js_script = JSStringCreateWithUTF8CString (script);
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JSValueRef js_exception = NULL;
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bool result = JSCheckScriptSyntax (js_context, js_script, NULL,
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0, &js_exception);
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if (!result && exception)
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{
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JSStringRef js_message = JSValueToStringCopy (js_context,
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js_exception, NULL);
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*exception = gjs_string_utf8 (js_message);
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JSStringRelease (js_message);
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}
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JSStringRelease (js_script);
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return result ? TRUE : FALSE;
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}
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gboolean
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gjs_script_from_file (JSContextRef js_context,
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const gchar* filename,
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gchar** exception)
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{
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g_return_val_if_fail (js_context, FALSE);
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g_return_val_if_fail (filename, FALSE);
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gboolean result = FALSE;
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gchar* script;
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GError* error = NULL;
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if (g_file_get_contents (filename, &script, NULL, &error))
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{
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if (gjs_script_eval (js_context, script, exception))
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result = TRUE;
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g_free (script);
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}
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else if (error)
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{
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*exception = g_strdup (error->message);
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g_error_free (error);
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}
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return result;
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}
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gchar*
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gjs_string_utf8 (JSStringRef js_string)
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{
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size_t size_utf8 = JSStringGetMaximumUTF8CStringSize (js_string);
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gchar* string_utf8 = g_new (gchar, size_utf8);
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JSStringGetUTF8CString (js_string, string_utf8, size_utf8);
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return string_utf8;
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}
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static void
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_js_class_get_property_names_cb (JSContextRef js_context,
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JSObjectRef js_object,
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JSPropertyNameAccumulatorRef js_properties)
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{
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GObject* object = JSObjectGetPrivate (js_object);
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if (object)
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{
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guint n_properties;
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GParamSpec** pspecs = g_object_class_list_properties (
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G_OBJECT_GET_CLASS (object), &n_properties);
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gint i;
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for (i = 0; i < n_properties; i++)
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{
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const gchar* property = g_param_spec_get_name (pspecs[i]);
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JSStringRef js_property = JSStringCreateWithUTF8CString (property);
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JSPropertyNameAccumulatorAddName (js_properties, js_property);
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JSStringRelease (js_property);
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}
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}
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}
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static bool
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_js_class_has_property_cb (JSContextRef js_context,
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JSObjectRef js_object,
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JSStringRef js_property)
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{
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bool result = false;
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gchar* property = gjs_string_utf8 (js_property);
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GObject* object = JSObjectGetPrivate (js_object);
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if (object)
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{
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if (g_object_class_find_property (G_OBJECT_GET_CLASS (object),
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property))
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result = true;
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}
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else if (js_object == JSContextGetGlobalObject (js_context))
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{
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GType type = g_type_from_name (property);
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result = type ? type : false;
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}
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g_free (property);
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return result;
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}
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static void
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_js_object_set_property (JSContextRef js_context,
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JSObjectRef js_object,
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const gchar* name,
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JSValueRef js_value)
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{
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JSStringRef js_name = JSStringCreateWithUTF8CString (name);
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JSObjectSetProperty(js_context, js_object, js_name, js_value,
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kJSPropertyAttributeNone, NULL);
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JSStringRelease (js_name);
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}
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static JSValueRef
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_js_class_get_property_cb (JSContextRef js_context,
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JSObjectRef js_object,
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JSStringRef js_property,
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JSValueRef* js_exception)
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{
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GObject* object = JSObjectGetPrivate (js_object);
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g_return_val_if_fail (object, JSValueMakeNull (js_context));
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JSValueRef js_result = NULL;
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gchar* property = gjs_string_utf8 (js_property);
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GParamSpec* pspec = g_object_class_find_property (
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G_OBJECT_GET_CLASS (object), property);
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if (!pspec)
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{
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gchar* message = g_strdup_printf (_("%s has no property '%s'"),
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G_OBJECT_NAME (object), property);
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JSStringRef js_message = JSStringCreateWithUTF8CString (message);
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*js_exception = JSValueMakeString (js_context, js_message);
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JSStringRelease (js_message);
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g_free (message);
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g_free (property);
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return JSValueMakeNull (js_context);
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}
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if (!(pspec->flags & G_PARAM_READABLE))
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{
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g_free (property);
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return JSValueMakeUndefined (js_context);
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}
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GType type = G_PARAM_SPEC_TYPE (pspec);
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if (type == G_TYPE_PARAM_STRING)
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{
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gchar* value;
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g_object_get (object, property, &value, NULL);
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if (value)
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{
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JSStringRef js_string = JSStringCreateWithUTF8CString (value);
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js_result = JSValueMakeString (js_context, js_string);
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}
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}
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else if (type == G_TYPE_PARAM_INT || type == G_TYPE_PARAM_UINT)
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{
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gint value;
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g_object_get (object, property, &value, NULL);
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js_result = JSValueMakeNumber (js_context, value);
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}
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else if (type == G_TYPE_PARAM_BOOLEAN)
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{
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gboolean value;
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g_object_get (object, property, &value, NULL);
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js_result = JSValueMakeBoolean (js_context, value ? true : false);
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}
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else if (type == G_TYPE_PARAM_OBJECT)
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{
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GObject* value;
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g_object_get (object, property, &value, NULL);
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if (value)
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js_result = gjs_object_new (js_context,
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G_OBJECT_NAME (value), value);
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}
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else if (type == G_TYPE_PARAM_ENUM)
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{
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gint value;
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g_object_get (object, property, &value, NULL);
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js_result = JSValueMakeNumber (js_context, value);
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}
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else
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js_result = JSValueMakeUndefined (js_context);
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g_free (property);
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return js_result ? js_result : JSValueMakeNull (js_context);
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}
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static bool
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_js_class_set_property_cb (JSContextRef js_context,
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JSObjectRef js_object,
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JSStringRef js_property,
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JSValueRef js_value,
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JSValueRef* js_exception)
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{
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GObject* object = JSObjectGetPrivate (js_object);
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g_return_val_if_fail (object, false);
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bool result = false;
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gchar* property = gjs_string_utf8 (js_property);
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GParamSpec* pspec = g_object_class_find_property (
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G_OBJECT_GET_CLASS (object), property);
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if (!pspec)
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{
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gchar* message = g_strdup_printf (_("%s has no property '%s'"),
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G_OBJECT_NAME (object), property);
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JSStringRef js_message = JSStringCreateWithUTF8CString (message);
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*js_exception = JSValueMakeString (js_context, js_message);
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JSStringRelease (js_message);
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g_free (message);
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g_free (property);
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return false;
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}
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if (!(pspec->flags & G_PARAM_WRITABLE))
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{
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g_free (property);
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return false;
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}
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GType type = G_PARAM_SPEC_TYPE (pspec);
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if (type == G_TYPE_PARAM_STRING)
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{
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JSStringRef js_string_value = JSValueToStringCopy (js_context,
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js_value, js_exception);
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if (js_string_value)
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{
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gchar* string_value = gjs_string_utf8 (js_string_value);
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g_object_set (object, property, string_value, NULL);
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g_free (string_value);
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}
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}
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else if (type == G_TYPE_PARAM_INT || type == G_TYPE_PARAM_UINT)
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{
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int value = JSValueToNumber (js_context, js_value,
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js_exception);
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g_object_set (object, property, value, NULL);
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}
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else if (type == G_TYPE_PARAM_BOOLEAN)
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{
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bool value = JSValueToBoolean (js_context, js_value);
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g_object_set (object, property, value ? TRUE : FALSE, NULL);
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}
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else if (type == G_TYPE_PARAM_OBJECT)
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{
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JSObjectRef js_object_value = JSValueToObject (
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js_context, js_value, NULL);
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GObject* object_value = JSObjectGetPrivate (js_object_value);
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if (object_value)
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g_object_set (object, property, object_value, NULL);
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else
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{
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gchar* message = g_strdup_printf (_("%s cannot be assigned to %s.%s"),
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"[object]", G_OBJECT_NAME (object), property);
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JSStringRef js_message = JSStringCreateWithUTF8CString (message);
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*js_exception = JSValueMakeString (js_context, js_message);
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JSStringRelease (js_message);
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g_free (message);
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}
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}
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else
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{
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gchar* message = g_strdup_printf (_("%s.%s cannot be accessed"),
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G_OBJECT_NAME (object), property);
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JSStringRef js_message = JSStringCreateWithUTF8CString (message);
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*js_exception = JSValueMakeString (js_context, js_message);
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JSStringRelease (js_message);
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g_free (message);
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}
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g_free (property);
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return result;
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}
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static JSValueRef
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_js_object_call_as_function_cb (JSContextRef js_context,
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JSObjectRef js_function,
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JSObjectRef js_this,
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size_t n_arguments,
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const JSValueRef js_arguments[],
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JSValueRef* js_exception)
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{
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GObject* object = JSObjectGetPrivate (js_this);
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g_return_val_if_fail (object, JSValueMakeNull (js_context));
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if (!n_arguments)
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{
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gtk_widget_show (GTK_WIDGET (object));
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}
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else if (n_arguments == 1)
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{
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JSObjectRef js_arg1 = JSValueToObject (
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js_context, js_arguments[0], NULL);
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GObject* arg1 = JSObjectGetPrivate (js_arg1);
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if (arg1)
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gtk_container_add (GTK_CONTAINER (object), GTK_WIDGET (arg1));
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}
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return JSValueMakeUndefined (js_context);
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}
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static void
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_js_object_add_function (JSContextRef js_context,
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JSObjectRef js_object,
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const gchar* func)
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{
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JSStringRef js_func = JSStringCreateWithUTF8CString (func);
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JSObjectRef js_function = JSObjectMakeFunctionWithCallback (
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js_context, js_func, _js_object_call_as_function_cb);
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JSStringRelease (js_func);
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_js_object_set_property (js_context, js_object, func, js_function);
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}
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JSObjectRef
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gjs_object_new (JSContextRef js_context,
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const gchar* name,
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gpointer instance)
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{
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g_return_val_if_fail (js_context, NULL);
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g_return_val_if_fail (name, NULL);
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JSClassDefinition js_class_def = kJSClassDefinitionEmpty;
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js_class_def.className = g_strdup (name);
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js_class_def.getPropertyNames = _js_class_get_property_names_cb;
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js_class_def.hasProperty = _js_class_has_property_cb;
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js_class_def.getProperty = _js_class_get_property_cb;
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js_class_def.setProperty = _js_class_set_property_cb;
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JSClassRef js_class = JSClassCreate (&js_class_def);
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JSObjectRef js_object = JSObjectMake (js_context, js_class, instance);
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if (instance && G_IS_OBJECT (instance))
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{
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// TODO: Add functions dynamically
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/*if (GTK_IS_WIDGET (instance))
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{
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_js_object_add_function (js_context, js_object, "show");
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}*/
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}
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return js_object;
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}
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static JSObjectRef
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_js_object_call_as_constructor_cb (JSContextRef js_context,
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JSObjectRef js_object,
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size_t n_arguments,
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const JSValueRef js_arguments[],
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JSValueRef* js_exception)
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{
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const gchar* type_name = JSObjectGetPrivate (js_object);
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g_return_val_if_fail (type_name, NULL);
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GType type = g_type_from_name (type_name);
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if (type)
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return gjs_object_new (js_context, type_name, g_object_new (type, NULL));
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return NULL;
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}
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static bool
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_js_module_has_property_cb (JSContextRef js_context,
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JSObjectRef js_object,
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JSStringRef js_property)
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{
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const gchar* namespace = JSObjectGetPrivate (js_object);
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g_return_val_if_fail (namespace, false);
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gchar* property = gjs_string_utf8 (js_property);
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gchar* type_name = g_strdup_printf ("%s%s", namespace, property);
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GType type = g_type_from_name (type_name);
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if (!type)
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{
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GModule* module = g_module_open (NULL,
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G_MODULE_BIND_LAZY | G_MODULE_BIND_LOCAL);
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typedef GType (*gjs_get_type_func)(void);
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// FIXME: Insert a space between each capital letter
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gchar* type_func_name = g_strdup_printf ("%s_%s_get_type",
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namespace, property);
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gchar* type_func_name_small = g_utf8_strdown (type_func_name, -1);
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gjs_get_type_func type_func;
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if (g_module_symbol (module,
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(const gchar*)type_func_name_small, &type_func))
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{
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type = type_func ();
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g_type_class_peek (type);
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}
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g_free (type_func_name_small);
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g_free (type_func_name);
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g_module_close (module);
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}
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bool result = type ? true : false;
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g_free (type_name);
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g_free (property);
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return result;
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}
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static JSValueRef
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_js_module_get_property_cb (JSContextRef js_context,
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JSObjectRef js_object,
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JSStringRef js_property,
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JSValueRef* js_exception)
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{
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const gchar* namespace = JSObjectGetPrivate (js_object);
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g_return_val_if_fail (namespace, JSValueMakeNull (js_context));
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gchar* property = gjs_string_utf8 (js_property);
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gchar* type_name = g_strdup_printf ("%s%s", namespace, property);
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GType type = g_type_from_name (type_name);
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JSValueRef result;
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if (type)
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{
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JSClassDefinition js_class_def = kJSClassDefinitionEmpty;
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js_class_def.className = g_strdup (type_name);
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js_class_def.callAsConstructor = _js_object_call_as_constructor_cb;
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JSClassRef js_class = JSClassCreate (&js_class_def);
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result = JSObjectMake (js_context, js_class, type_name);
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}
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else
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{
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result = JSValueMakeNull (js_context);
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g_free (type_name);
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}
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g_free (property);
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return result;
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}
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JSObjectRef
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gjs_module_new (JSContextRef js_context,
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const gchar* namespace)
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{
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g_return_val_if_fail (js_context, NULL);
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g_return_val_if_fail (namespace, NULL);
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JSClassDefinition js_class_def = kJSClassDefinitionEmpty;
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js_class_def.className = g_strdup (namespace);
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js_class_def.hasProperty = _js_module_has_property_cb;
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js_class_def.getProperty = _js_module_get_property_cb;
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JSClassRef js_class = JSClassCreate (&js_class_def);
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JSObjectRef js_module = JSObjectMake (js_context, js_class, namespace);
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return js_module;
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}
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JSGlobalContextRef
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gjs_global_context_new (void)
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{
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JSGlobalContextRef js_context = JSGlobalContextCreate (NULL);
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JSObjectRef js_gjs = gjs_object_new (js_context, "GJS", NULL);
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_js_object_set_property (js_context, JSContextGetGlobalObject (js_context),
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"gjs", js_gjs);
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JSObjectRef js_gtk = gjs_module_new (js_context, "Gtk");
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_js_object_set_property (js_context, JSContextGetGlobalObject (js_context),
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"Gtk", js_gtk);
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return js_context;
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}
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