make i3bar use libi3’s root_atom_contents()

[i3/i3] / i3-input / main.c

diff --git a/i3-input/main.c b/i3-input/main.c
index b3e626e617c8f0e11f51dcbf863aedbcd507a680..da95c903fae825cf762d7633bcc7dd0bac2fa555 100644 (file)
--- a/i3-input/main.c
+++ b/i3-input/main.c
@@ -2,13 +2,12 @@
  * vim:ts=4:sw=4:expandtab
  *
  * i3 - an improved dynamic tiling window manager
- * © 2009-2011 Michael Stapelberg and contributors (see also: LICENSE)
+ * © 2009-2013 Michael Stapelberg and contributors (see also: LICENSE)
  *
  * i3-input/main.c: Utility which lets the user input commands and sends them
  *                  to i3.
  *
  */
-#include <ev.h>
 #include <stdio.h>
 #include <sys/types.h>
 #include <stdlib.h>
@@ -55,6 +54,7 @@ static int limit;
 xcb_window_t root;
 xcb_connection_t *conn;
 xcb_screen_t *root_screen;
+static xcb_get_input_focus_cookie_t focus_cookie;
 
 /*
  * Having verboselog() and errorlog() is necessary when using libi3.
@@ -76,6 +76,24 @@ void errorlog(char *fmt, ...) {
     va_end(args);
 }
 
+/*
+ * Restores the X11 input focus to whereever it was before.
+ * This is necessary because i3-input’s window has override_redirect=1
+ * (→ unmanaged by the window manager) and thus i3-input changes focus itself.
+ * This function is called on exit().
+ *
+ */
+static void restore_input_focus(void) {
+    xcb_generic_error_t *error;
+    xcb_get_input_focus_reply_t *reply = xcb_get_input_focus_reply(conn, focus_cookie, &error);
+    if (error != NULL) {
+        fprintf(stderr, "[i3-input] ERROR: Could not restore input focus (X error %d)\n", error->error_code);
+        return;
+    }
+    xcb_set_input_focus(conn, XCB_INPUT_FOCUS_POINTER_ROOT, reply->focus, XCB_CURRENT_TIME);
+    xcb_flush(conn);
+}
+
 /*
  * Concats the glyphs (either UCS-2 or UTF-8) to a single string, suitable for
  * rendering it (UCS-2) or sending it to i3 (UTF-8).
@@ -187,6 +205,10 @@ static void finish_input() {
     /* prefix the command if a prefix was specified on commandline */
     printf("command = %s\n", full);
 
+    restore_input_focus();
+
+    xcb_aux_sync(conn);
+
     ipc_send_message(sockfd, strlen(full), 0, (uint8_t*)full);
 
 #if 0
@@ -239,6 +261,7 @@ static int handle_key_press(void *ignored, xcb_connection_t *conn, xcb_key_press
         return 1;
     }
     if (sym == XK_Escape) {
+        restore_input_focus();
         exit(0);
     }
 
@@ -345,20 +368,23 @@ int main(int argc, char *argv[]) {
 
     printf("using format \"%s\"\n", format);
 
+    int screen;
+    conn = xcb_connect(NULL, &screen);
+    if (!conn || xcb_connection_has_error(conn))
+        die("Cannot open display\n");
+
     if (socket_path == NULL)
-        socket_path = root_atom_contents("I3_SOCKET_PATH");
+        socket_path = root_atom_contents("I3_SOCKET_PATH", conn, screen);
 
     if (socket_path == NULL)
         socket_path = "/tmp/i3-ipc.sock";
 
     sockfd = ipc_connect(socket_path);
 
-    int screens;
-    conn = xcb_connect(NULL, &screens);
-    if (!conn || xcb_connection_has_error(conn))
-        die("Cannot open display\n");
+    /* Request the current InputFocus to restore when i3-input exits. */
+    focus_cookie = xcb_get_input_focus(conn);
 
-    root_screen = xcb_aux_get_screen(conn, screens);
+    root_screen = xcb_aux_get_screen(conn, screen);
     root = root_screen->root;
 
     symbols = xcb_key_symbols_alloc(conn);
@@ -418,6 +444,7 @@ int main(int argc, char *argv[]) {
 
     if (reply->status != XCB_GRAB_STATUS_SUCCESS) {
         fprintf(stderr, "Could not grab keyboard, status = %d\n", reply->status);
+        restore_input_focus();
         exit(-1);
     }