#643 Hide/unhide programatically

src/tint2-send/tint2-send.c

@@ -0,0 +1,128 @@
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/Xatom.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static Display *display = 0;
+
+/* From wmctrl */
+char *get_property(Window window, Atom xa_prop_type, const char *prop_name) {
+    Atom xa_prop_name = XInternAtom(display, prop_name, False);
+
+    Atom xa_ret_type;
+    int ret_format;
+    unsigned long ret_nitems;
+    unsigned long ret_bytes_after;
+    unsigned long tmp_size;
+    unsigned char *ret_prop;
+    if (XGetWindowProperty(display, window, xa_prop_name, 0, 1024,
+                           False, xa_prop_type, &xa_ret_type, &ret_format,
+                           &ret_nitems, &ret_bytes_after, &ret_prop) != Success) {
+        return NULL;
+    }
+
+    if (xa_ret_type != xa_prop_type) {
+        XFree(ret_prop);
+        return NULL;
+    }
+
+    /* Correct 64 Architecture implementation of 32 bit data */
+    tmp_size = (ret_format / 8) * ret_nitems;
+    if (ret_format == 32)
+        tmp_size *= sizeof(long) / 4;
+
+    char *ret = (char *)calloc(1, tmp_size + 1);
+    memcpy(ret, ret_prop, tmp_size);
+
+    XFree(ret_prop);
+    return ret;
+}
+
+int is_tint2(Window window)
+{
+    XWindowAttributes attr = {};
+    if (!XGetWindowAttributes(display, window, &attr))
+        return 0;
+    if (attr.map_state != IsViewable)
+        return 0;
+
+    char *wm_class = get_property(window, XA_STRING, "WM_NAME");
+    if (!wm_class) {
+        return 0;
+    }
+    int class_match = 0;
+    if (strcmp(wm_class, "tint2") == 0) {
+        class_match = 1;
+    }
+    free(wm_class);
+    return class_match;
+}
+
+void handle_tint2_window(Window window, void *arg)
+{
+    if (!is_tint2(window))
+        return;
+    char *action = (char *)arg;
+    if (strcmp(action, "show") == 0) {
+        fprintf(stderr, "Showing tint2 window: %lx\n", window);
+        XEvent event = {};
+        event.xcrossing.type = EnterNotify;
+        event.xcrossing.window = window;
+        event.xcrossing.mode = NotifyNormal;
+        event.xcrossing.detail = NotifyVirtual;
+        event.xcrossing.same_screen = True;
+        XSendEvent(display, window, False, 0, &event);
+        XFlush(display);
+    } else if (strcmp(action, "hide") == 0) {
+        fprintf(stderr, "Hiding tint2 window: %lx\n", window);
+        XEvent event = {};
+        event.xcrossing.type = LeaveNotify;
+        event.xcrossing.window = window;
+        event.xcrossing.mode = NotifyNormal;
+        event.xcrossing.detail = NotifyVirtual;
+        event.xcrossing.same_screen = True;
+        XSendEvent(display, window, False, 0, &event);
+        XFlush(display);
+    } else {
+        fprintf(stderr, "Error: unknown action %s\n", action);
+    }
+}
+
+typedef void window_callback_t(Window window, void *arg);
+
+void walk_windows(Window node, window_callback_t *callback, void *arg)
+{
+    callback(node, arg);
+    Window root = 0;
+    Window parent = 0;
+    Window *children = 0;
+    unsigned int nchildren = 0;
+    if (!XQueryTree(display, node,
+                    &root, &parent, &children, &nchildren)) {
+        return;
+    }
+    for (unsigned int i = 0; i < nchildren; i++) {
+        walk_windows(children[i], callback, arg);
+    }
+}
+
+int main(int argc, char **argv)
+{
+    display = XOpenDisplay(NULL);
+    if (!display ) {
+        fprintf(stderr, "Failed to open X11 connection\n");
+        exit(1);
+    }
+
+    argc--, argv++;
+    if (!argc) {
+        fprintf(stderr, "Usage: tint2-show show\n");
+        exit(1);
+    }
+    char *action = argv[0];
+    walk_windows(DefaultRootWindow(display), handle_tint2_window, action);
+
+    return 0;
+}