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lightdm-webkit2-greeter
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sisyphus
Dustin Falgout 8 years ago
parent
36e3e198c4
commit
f9ca7ce81b
2 changed files with 95 additions and 77 deletions
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  1. 113
      src/greeter.c
  2. 59
      src/webkit2-extension.c

113
src/greeter.c
Unescape View File

@ -53,6 +53,7 @@ static GtkWidget *web_view;
static GtkWidget *window;
static WebKitSettings *webkit_settings;
static GdkDisplay *default_display;
static GResource *greeter_resources;
/* Screensaver values */
static int timeout, interval, prefer_blanking, allow_exposures;
@ -61,6 +62,7 @@ static gint config_timeout;
static gboolean debug_mode, heartbeat, heartbeat_exit;
static GdkFilterReturn
wm_window_filter(GdkXEvent *gxevent, GdkEvent *event, gpointer data) {
XEvent *xevent = (XEvent *) gxevent;
@ -106,7 +108,7 @@ create_new_webkit_settings_object(void) {
"javascript-can-open-windows-automatically", TRUE,
"allow-file-access-from-file-urls", TRUE,
"enable-write-console-messages-to-stdout", TRUE,
//"allow-universal-access-from-file-urls", TRUE,
"allow-universal-access-from-file-urls", TRUE,
NULL
);
}
@ -128,17 +130,17 @@ context_menu_cb(WebKitWebView *view,
static gboolean
check_theme_heartbeat_cb(void) {
check_theme_heartbeat(void) {
if (! heartbeat && ! heartbeat_exit) {
/* Theme heartbeat not received. We assume that an error has occurred
* which broke script execution. We will fallback to the simple theme
* so the user won't be stuck with a broken login screen.
*/
g_warning("[ERROR] :: A problem was detected with the current theme. Falling back to simple theme...");
webkit_web_view_load_uri(
WEBKIT_WEB_VIEW(web_view),
g_strdup_printf("file://%s/simple/index.html", THEME_DIR)
);
/* Theme heartbeat not received. We assume that an error has occurred
* which broke script execution. We will fallback to the simple theme
* so the user won't be stuck with a broken login screen.
*/
g_warning("[ERROR] :: A problem was detected with the current theme. Falling back to simple theme...");
webkit_web_view_load_uri(
WEBKIT_WEB_VIEW(web_view),
g_strdup_printf("file://%s/simple/index.html", THEME_DIR)
);
}
heartbeat = FALSE;
@ -148,17 +150,13 @@ check_theme_heartbeat_cb(void) {
/**
* Callback for Theme Heartbeat. Themes start the heartbeat by sending a post message
* via JavaScript. Once started, the heartbeat will schedule a check to ensure that the
* theme has sent a subsequent heartbeat message. Once started, if a heartbeat message was not
* received by the time our check runs we assume that there has been an error in the web
* process and fallback to the simple theme.
* Callback for Theme Heartbeat.
*/
static void
theme_heartbeat_cb(void) {
theme_heartbeat_handler(void) {
if (! heartbeat) {
/* Setup g_timeout callback for theme heartbeat check */
g_timeout_add_seconds(8, (GSourceFunc) check_theme_heartbeat_cb, NULL);
g_timeout_add_seconds(8, (GSourceFunc) check_theme_heartbeat, NULL);
heartbeat = TRUE;
heartbeat_exit = FALSE;
}
@ -166,20 +164,49 @@ theme_heartbeat_cb(void) {
/**
* Heartbeat exit callback.
*
* Before starting the user's session, themes should exit the heartbeat
* to prevent a race condition while the greeter is shutting down.
* Before starting the user's session, the web process will send a signal to exit the hearbeat
* in order to prevent a race condition while the greeter is shutting down.
*/
static void
theme_heartbeat_exit_cb(void) {
theme_heartbeat_exit_handler(void) {
heartbeat_exit = TRUE;
}
static void
theme_heartbeat_script_loaded_cb(GObject *object,
GAsyncResult *result,
gpointer user_data) {
WebKitJavascriptResult *js_result;
JSValueRef value;
JSGlobalContextRef context;
GError *error = NULL;
js_result = webkit_web_view_run_javascript_from_gresource_finish(
WEBKIT_WEB_VIEW(object),
result,
&error
);
if (!js_result) {
g_warning("Error running javascript: %s", error->message);
g_error_free(error);
return;
}
context = webkit_javascript_result_get_global_context(js_result);
value = webkit_javascript_result_get_value(js_result);
if (! JSValueIsNull(context, value) && ! JSValueIsUndefined(context, value)) {
g_warning("Error running javascript: unexpected return value.");
}
webkit_javascript_result_unref(js_result);
}
/**
* Lock Hint enabled handler.
*
* Makes the greeter behave a bit more like a screensaver if it was launched as
* a lock-screen by blanking the screen.
*/
@ -194,6 +221,25 @@ lock_hint_enabled_handler(void) {
}
static void
load_theme_heartbeat_script() {
webkit_web_view_run_javascript_from_gresource(
WEBKIT_WEB_VIEW(web_view),
"/com/antergos/lightdm-webkit2-greeter/js/heartbeat.js",
NULL,
(GAsyncReadyCallback) theme_heartbeat_script_loaded_cb,
NULL
);
}
static void
page_loaded_handler(void) {
load_theme_heartbeat_script();
}
/**
* Message received callback.
*
@ -229,12 +275,17 @@ message_received_cb(WebKitUserContentManager *manager,
printf("Error running javascript: unexpected return value");
}
if (strcmp(message_str, "LockHint") == 0) {
if (strcmp(message_str, "PageLoaded") == 0) {
page_loaded_handler();
} else if (strcmp(message_str, "LockHint") == 0) {
lock_hint_enabled_handler();
} else if (strcmp(message_str, "Heartbeat") == 0) {
theme_heartbeat_cb();
theme_heartbeat_handler();
} else if (strcmp(message_str, "Heartbeat::Exit") == 0) {
theme_heartbeat_exit_cb();
theme_heartbeat_exit_handler();
}
g_free(message_str);
@ -276,7 +327,6 @@ main(int argc, char **argv) {
WebKitWebContext *context;
GtkCssProvider *css_provider;
WebKitCookieManager *cookie_manager;
GResource *greeter_resources;
/* Prevent memory from being swapped out, since we see unencrypted passwords. */
mlockall (MCL_CURRENT | MCL_FUTURE);
@ -326,7 +376,10 @@ main(int argc, char **argv) {
css_provider = gtk_css_provider_new();
g_resources_register(greeter_resources);
gtk_css_provider_load_from_resource(css_provider, "/com/antergos/lightdm-webkit2-greeter/css/style.css");
gtk_css_provider_load_from_resource(
css_provider,
"/com/antergos/lightdm-webkit2-greeter/css/style.css"
);
gtk_style_context_add_provider_for_screen(
screen,
GTK_STYLE_PROVIDER(css_provider),

59
src/webkit2-extension.c
Unescape View File

@ -45,7 +45,6 @@
#include <lightdm.h>
#include <config.h>
#include "gresource/greeter-resources.h"
G_MODULE_EXPORT void webkit_web_extension_initialize(WebKitWebExtension *extension);
@ -74,8 +73,6 @@ static JSClassRef
config_file_class,
greeter_util_class;
static GResource *greeter_resources;
/*
* Returns either a string or null.
@ -1448,36 +1445,6 @@ static const JSClassDefinition greeter_util_definition = {
};
static void
inject_theme_heartbeat_script(JSGlobalContextRef jsContext) {
JSStringRef command;
GBytes *resource;
GError *err = NULL;
gsize *size = NULL;
greeter_resources = greeter_resources_get_resource();
resource = g_resource_lookup_data(
greeter_resources,
"/com/antergos/lightdm-webkit2-greeter/js/heartbeat.js",
0,
&err
);
if (NULL != err) {
fprintf(stderr, "Loading heartbeat.js from GResource failed: %s\n", err->message);
g_error_free(err);
return;
}
command = JSStringCreateWithCharacters(g_bytes_unref_to_data(resource, size), sizeof size);
JSEvaluateScript(jsContext, command, NULL, NULL, 0, NULL);
g_object_unref(resource);
g_free(size);
}
static void
window_object_cleared_callback(WebKitScriptWorld *world,
WebKitWebPage *web_page,
@ -1494,7 +1461,8 @@ window_object_cleared_callback(WebKitScriptWorld *world,
globalObject;
JSStringRef command;
JSStringRef heartbeat_command;
gchar *message = "LockHint";
gchar *lock_hint_message = "LockHint";
gchar *page_loaded_message = "PageLoaded";
jsContext = webkit_frame_get_javascript_context_for_script_world(frame, world);
globalObject = JSContextGetGlobalObject(jsContext);
@ -1544,25 +1512,22 @@ window_object_cleared_callback(WebKitScriptWorld *world,
command = JSStringCreateWithUTF8CString("window.greeterutil = greeter_util;");
JSEvaluateScript(jsContext, command, NULL, NULL, 0, NULL);
/* Inject GreeterThemeHeartbeat class */
inject_theme_heartbeat_script(jsContext);
dom_document = webkit_web_page_get_dom_document(web_page);
dom_window = webkit_dom_document_get_default_view(dom_document);
/* Start the heartbeat */
heartbeat_command = JSStringCreateWithUTF8CString("new GreeterThemeHeartbeat();");
JSEvaluateScript(jsContext, heartbeat_command, NULL, NULL, 0, NULL);
if (dom_window) {
/* Notify the UI process that the page is loaded */
webkit_dom_dom_window_webkit_message_handlers_post_message(
dom_window, "GreeterBridge", page_loaded_message
);
/* If the greeter was started as a lock-screen, notify our UI process. */
if (lightdm_greeter_get_lock_hint(greeter)) {
dom_document = webkit_web_page_get_dom_document(web_page);
dom_window = webkit_dom_document_get_default_view(dom_document);
if (dom_window) {
/* If the greeter was started as a lock-screen, notify our UI process. */
if (lightdm_greeter_get_lock_hint(greeter)) {
webkit_dom_dom_window_webkit_message_handlers_post_message(
dom_window, "GreeterBridge", message
dom_window, "GreeterBridge", lock_hint_message
);
}
}
}

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