Run xephyr in a custom window

Xephyr doesn't work very well with multiple outputs. This should
allow us to customize our behavior in that case.

1 files changed, 58 insertions, 0 deletions

diff --git a/commands/helpers/xephyr-window.c b/commands/helpers/xephyr-window.c
new file mode 100755
index 0000000..b711f99
--- /dev/null
+++ b/commands/helpers/xephyr-window.c
@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+
+int main(int argc, char **argv)
+{
+    Display *display = XOpenDisplay(NULL);
+    Window window, root_window;
+    Atom atom;
+    int width = 100, height = 100;
+
+    if (argc > 1) {
+        char *geometry = strdup(argv[1]);
+        char *delimiter = strchr(geometry, 'x');
+
+        if (delimiter == NULL) {
+            fprintf(stderr, "Cannot parse geometry\n");
+            free(geometry);
+            exit(1);
+        }
+
+        *delimiter = '\0';
+        width = atoi(geometry);
+        height = atoi(delimiter + 1);
+
+        free(geometry);
+    }
+
+    root_window = RootWindow(display, 0);
+
+    window = XCreateSimpleWindow(display, root_window, 0, 0,
+                                 width, height, 0, 0, 0);
+
+    printf("%d\n", window);
+    fflush(stdout);
+
+    if (argc < 2) {
+        atom = XInternAtom(display, "_NET_WM_STATE_FULLSCREEN", True);
+        XChangeProperty(display, window,
+                        XInternAtom(display, "_NET_WM_STATE", True),
+                        XA_ATOM, 32, PropModeReplace,
+                        (unsigned char *)&atom, 1);
+    }
+
+    XMapWindow(display, window);
+
+    XFlush(display);
+
+    while(1) {
+        sleep(60);
+    }
+
+    XCloseDisplay(display);
+
+    return(0);
+}