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/* -*- Mode: C; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* Copyright © 2012 Igalia S.L.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "config.h"
#include "ephy-web-extension.h"
#include <gio/gio.h>
#include <webkit2/webkit-web-extension.h>
static const char introspection_xml[] =
"<node>"
" <interface name='org.gnome.Epiphany.WebExtension'>"
" <method name='HasModifiedForms'>"
" <arg type='t' name='page_id' direction='in'/>"
" <arg type='b' name='has_modified_forms' direction='out'/>"
" </method>"
" </interface>"
"</node>";
#define MIN_INPUT_LENGTH 50
static gboolean
ephy_web_extension_page_has_modified_forms (WebKitWebPage *web_page)
{
WebKitDOMHTMLCollection *forms = NULL;
WebKitDOMDocument *document = NULL;
gulong forms_n;
int i;
document = webkit_web_page_get_dom_document (web_page);
forms = webkit_dom_document_get_forms (document);
forms_n = webkit_dom_html_collection_get_length (forms);
for (i = 0; i < forms_n; i++) {
WebKitDOMHTMLCollection *elements;
WebKitDOMNode *form_element = webkit_dom_html_collection_item (forms, i);
gulong elements_n;
int j;
gboolean modified_input_element = FALSE;
elements = webkit_dom_html_form_element_get_elements (WEBKIT_DOM_HTML_FORM_ELEMENT (form_element));
elements_n = webkit_dom_html_collection_get_length (elements);
for (j = 0; j < elements_n; j++) {
WebKitDOMNode *element;
element = webkit_dom_html_collection_item (elements, j);
if (WEBKIT_DOM_IS_HTML_TEXT_AREA_ELEMENT (element))
if (webkit_dom_html_text_area_element_is_edited (WEBKIT_DOM_HTML_TEXT_AREA_ELEMENT (element)))
return TRUE;
if (WEBKIT_DOM_IS_HTML_INPUT_ELEMENT (element))
if (webkit_dom_html_input_element_is_edited (WEBKIT_DOM_HTML_INPUT_ELEMENT (element))) {
glong length;
char *text;
/* A small heuristic here. If there's only one input element
* modified and it does not have a lot of text the user is
* likely not very interested in saving this work, so do
* nothing (eg, google search input). */
if (modified_input_element)
return TRUE;
modified_input_element = TRUE;
text = webkit_dom_html_input_element_get_value (WEBKIT_DOM_HTML_INPUT_ELEMENT (element));
length = g_utf8_strlen (text, -1);
g_free (text);
if (length > MIN_INPUT_LENGTH)
return TRUE;
}
}
}
return FALSE;
}
static void
handle_method_call (GDBusConnection *connection,
const char *sender,
const char *object_path,
const char *interface_name,
const char *method_name,
GVariant *parameters,
GDBusMethodInvocation *invocation,
gpointer user_data)
{
WebKitWebExtension *web_extension = WEBKIT_WEB_EXTENSION (user_data);
WebKitWebPage *web_page;
guint64 page_id;
if (g_strcmp0 (interface_name, EPHY_WEB_EXTENSION_INTERFACE) != 0)
return;
g_variant_get(parameters, "(t)", &page_id);
web_page = webkit_web_extension_get_page (web_extension, page_id);
if (!web_page) {
g_dbus_method_invocation_return_error (invocation, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS,
"Invalid page ID: %"G_GUINT64_FORMAT, page_id);
return;
}
if (g_strcmp0 (method_name, "HasModifiedForms") == 0) {
gboolean has_modifed_forms;
has_modifed_forms = ephy_web_extension_page_has_modified_forms (web_page);
g_dbus_method_invocation_return_value (invocation, g_variant_new ("(b)", has_modifed_forms));
}
}
static const GDBusInterfaceVTable interface_vtable = {
handle_method_call,
NULL,
NULL
};
static void
bus_acquired_cb (GDBusConnection *connection,
const char *name,
gpointer user_data)
{
guint registration_id;
GError *error = NULL;
static GDBusNodeInfo *introspection_data = NULL;
if (!introspection_data)
introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
registration_id = g_dbus_connection_register_object (connection,
EPHY_WEB_EXTENSION_OBJECT_PATH,
introspection_data->interfaces[0],
&interface_vtable,
g_object_ref (user_data),
(GDestroyNotify)g_object_unref,
&error);
if (!registration_id) {
g_warning ("Failed to register object: %s\n", error->message);
g_error_free (error);
}
}
G_MODULE_EXPORT void
webkit_web_extension_initialize (WebKitWebExtension *extension)
{
g_bus_own_name (G_BUS_TYPE_SESSION,
EPHY_WEB_EXTENSION_SERVICE_NAME,
G_BUS_NAME_OWNER_FLAGS_NONE,
bus_acquired_cb,
NULL, NULL,
g_object_ref (extension),
(GDestroyNotify)g_object_unref);
}
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