Cleanup and refactor x11 code

- Deleted X11 code for an unfinished/broken feature
- Rename xtra -> x11focus
- Cleanup the remaining code a bit

cfg/checks/x11.mk

@@ -1,7 +1,7 @@
 # Variables for X11 support
 X11_LIBS = x11
 X11_CFLAGS = -DX11
-X11_OBJ = xtra.o
+X11_OBJ = x11focus.o
 
 # Check if we can build X11 support
 CHECK_X11_LIBS = $(shell $(PKG_CONFIG) --exists $(X11_LIBS) || echo -n "error")

src/notify.c

@@ -35,7 +35,7 @@
 #include "misc_tools.h"
 #include "notify.h"
 #include "settings.h"
-#include "xtra.h"
+#include "x11focus.h"
 
 #if defined(AUDIO) || defined(SOUND_NOTIFY)
 #ifdef __APPLE__

src/toxic.c

@@ -66,7 +66,7 @@
 #include "windows.h"
 
 #ifdef X11
-#include "xtra.h"
+#include "x11focus.h"
 #endif
 
 #ifdef AUDIO
@@ -205,10 +205,7 @@ void exit_toxic_success(Tox *m)
     curl_global_cleanup();
 
 #ifdef X11
-    /* We have to terminate xtra last coz reasons
-     * Please don't call this anywhere else coz trust me
-     */
-    terminate_xtra();
+    terminate_x11focus();
 #endif /* X11 */
 
     exit(EXIT_SUCCESS);
@@ -1350,21 +1347,6 @@ static void init_default_data_files(void)
     free(user_config_dir);
 }
 
-// this doesn't do anything (yet)
-#ifdef X11
-void DnD_callback(const char *asdv, DropType dt)
-{
-    UNUSED_VAR(asdv);
-    UNUSED_VAR(dt);
-    // if (dt != DT_plain)
-    //     return;
-
-    // pthread_mutex_lock(&Winthread.lock);
-    // line_info_add(prompt, NULL, NULL, NULL, SYS_MSG, 0, 0, asdv);
-    // pthread_mutex_unlock(&Winthread.lock);
-}
-#endif /* X11 */
-
 int main(int argc, char **argv)
 {
     /* Make sure all written files are read/writeable only by the current user. */
@@ -1422,7 +1404,7 @@ int main(int argc, char **argv)
 
 #ifdef X11
 
-    if (init_xtra(DnD_callback) == -1) {
+    if (init_x11focus() == -1) {
         queue_init_message("X failed to initialize");
     }
 

src/x11focus.c

@@ -0,0 +1,95 @@
+/*  x11focus.c
+ *
+ *
+ *  Copyright (C) 2020 Toxic All Rights Reserved.
+ *
+ *  This file is part of Toxic.
+ *
+ *  Toxic 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 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  Toxic 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 Toxic.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "x11focus.h"
+
+#ifndef __APPLE__
+
+#include <X11/Xlib.h>
+
+static struct Focus {
+    Display *display;
+    Window terminal_window;
+} Focus;
+
+static long unsigned int focused_window_id(void)
+{
+    if (!Focus.display) {
+        return 0;
+    }
+
+    Window focus;
+    int revert;
+
+    XGetInputFocus(Focus.display, &focus, &revert);
+
+    return focus;
+}
+
+bool is_focused(void)
+{
+    if (!Focus.display) {
+        return false;
+    }
+
+    XLockDisplay(Focus.display);
+    bool ret = Focus.terminal_window == focused_window_id();
+    XUnlockDisplay(Focus.display);
+
+    return ret;
+}
+
+int init_x11focus(void)
+{
+    if (XInitThreads() == 0) {
+        return -1;
+    }
+
+    Focus.display = XOpenDisplay(NULL);
+
+    if (!Focus.display) {
+        return -1;
+    }
+
+    Focus.terminal_window = focused_window_id();
+
+    return 0;
+}
+
+void terminate_x11focus(void)
+{
+    if (!Focus.display) {
+        return;
+    }
+
+    XLockDisplay(Focus.display);
+
+    if (!Focus.terminal_window) {
+        XUnlockDisplay(Focus.display);
+        return;
+    }
+
+    XCloseDisplay(Focus.display);
+    XUnlockDisplay(Focus.display);
+}
+
+#endif /* !__APPLE__ */

src/xtra.h → src/x11focus.h

@@ -1,7 +1,7 @@
 /*  xtra.h
  *
  *
- *  Copyright (C) 2014 Toxic All Rights Reserved.
+ *  Copyright (C) 2020 Toxic All Rights Reserved.
  *
  *  This file is part of Toxic.
  *
@@ -20,21 +20,15 @@
  *
  */
 
-#ifndef XTRA_H
-#define XTRA_H
+#ifndef X11FOCUS_H
+#define X11FOCUS_H
 
-/* NOTE: If no xlib present don't compile */
-
-typedef enum {
-    DT_plain,
-    DT_file_list
-}
-DropType;
+#include <stdbool.h>
 
-typedef void (*drop_callback)(const char *, DropType);
+/* NOTE: If no xlib present don't compile */
 
-int               init_xtra(drop_callback d);
-void              terminate_xtra(void);
-int               is_focused(void); /* returns bool */
+int               init_x11focus(void);
+void              terminate_x11focus(void);
+bool              is_focused(void);
 
-#endif /* XTRA_H */
+#endif /* X11FOCUS */