Merge b80138ea72be3df02a638a922babed604ec51af5 into 25c3441925272978596df7964aeec68c295ad0b5

README.pod

@@ -32,6 +32,10 @@ Dock the bar at the bottom of the screen.
 
 Force docking without asking the window manager. This is needed if the window manager isn't EWMH compliant.
 
+=item B<-e>
+
+Output enter and leave window events on stdout.
+
 =item B<-f> I<font>
 
 Comma separated list of fonts, lemonbar supports a maximum of five fonts (the limit can be tweaked by changing the MAX_FONT_COUNT parameter in the source).

lemonbar.c

@@ -735,11 +735,16 @@ monitor_new (int x, int y, int width, int height)
     ret->window = xcb_generate_id(c);
 
     int depth = (visual == scr->root_visual) ? XCB_COPY_FROM_PARENT : 32;
+    uint32_t events =
+        XCB_EVENT_MASK_EXPOSURE     |
+        XCB_EVENT_MASK_BUTTON_PRESS |
+        XCB_EVENT_MASK_ENTER_WINDOW |
+        XCB_EVENT_MASK_LEAVE_WINDOW ;
     xcb_create_window(c, depth, ret->window, scr->root,
             ret->x, ret->y, width, bh, 0,
             XCB_WINDOW_CLASS_INPUT_OUTPUT, visual,
             XCB_CW_BACK_PIXEL | XCB_CW_BORDER_PIXEL | XCB_CW_OVERRIDE_REDIRECT | XCB_CW_EVENT_MASK | XCB_CW_COLORMAP,
-            (const uint32_t []){ bgc.v, bgc.v, dock, XCB_EVENT_MASK_EXPOSURE | XCB_EVENT_MASK_BUTTON_PRESS, colormap });
+            (const uint32_t []){ bgc.v, bgc.v, dock, events, colormap });
 
     ret->pixmap = xcb_generate_id(c);
     xcb_create_pixmap(c, depth, ret->pixmap, ret->window, width, bh);
@@ -1243,6 +1248,7 @@ main (int argc, char **argv)
     xcb_button_press_event_t *press_ev;
     char input[4096] = {0, };
     bool permanent = false;
+    bool enterleave = false;
     int geom_v[4] = { -1, -1, 0, 0 };
     int ch;
 
@@ -1260,7 +1266,7 @@ main (int argc, char **argv)
 
     ugc = fgc;
 
-    while ((ch = getopt(argc, argv, "hg:bdf:a:pu:B:F:")) != -1) {
+    while ((ch = getopt(argc, argv, "hg:bdef:a:pu:B:F:")) != -1) {
         switch (ch) {
             case 'h':
                 printf ("lemonbar version %s\n", VERSION);
@@ -1269,6 +1275,7 @@ main (int argc, char **argv)
                         "\t-g Set the bar geometry {width}x{height}+{xoffset}+{yoffset}\n"
                         "\t-b Put the bar at the bottom of the screen\n"
                         "\t-d Force docking (use this if your WM isn't EWMH compliant)\n"
+                        "\t-e Output enter and leave window events\n"
                         "\t-f Bar font list, comma separated\n"
                         "\t-p Don't close after the data ends\n"
                         "\t-u Set the underline/overline height in pixels\n"
@@ -1279,6 +1286,7 @@ main (int argc, char **argv)
             case 'p': permanent = true; break;
             case 'b': topbar = false; break;
             case 'd': dock = true; break;
+            case 'e': enterleave = true; break;
             case 'f': parse_font_list(optarg); break;
             case 'u': bu = strtoul(optarg, NULL, 10); break;
             case 'B': dbgc = bgc = parse_color(optarg, NULL, (rgba_t)scr->black_pixel); break;
@@ -1336,6 +1344,14 @@ main (int argc, char **argv)
                                 }
                             }
                             break;
+                        case XCB_ENTER_NOTIFY:
+                        case XCB_LEAVE_NOTIFY:
+                            {
+                                bool entered = ev->response_type == XCB_ENTER_NOTIFY;
+                                if (enterleave)
+                                    write(STDOUT_FILENO, entered ? "enter\n" : "leave\n", 6);
+                            }
+                            break;
                     }
 
                     free(ev);