Adding keypress_feedback patch

README.md

@@ -15,6 +15,8 @@ Refer to [https://tools.suckless.org/slock/](https://tools.suckless.org/slock/)
 
 ### Changelog:
 
+2020-08-03 - Added keypress_feedback patch
+
 2019-11-27 - Added xresources patch
 
 2019-10-17 - Added capscolor, control clear, dpms, mediakeys, message, pam auth, quickcancel patches
@@ -34,6 +36,9 @@ Refer to [https://tools.suckless.org/slock/](https://tools.suckless.org/slock/)
       - interacts with the Display Power Signaling and automatically shuts down the monitor after a configurable amount of seconds
       - the monitor will automatically be activated by pressing a key or moving the mouse and the password can be entered then
 
+   - [keypress_feedback](https://tools.suckless.org/slock/patches/keypress-feedback/)
+      - draws random blocks on the screen to display keypress feedback
+
    - [mediakeys](https://tools.suckless.org/slock/patches/mediakeys/)
       - allows media keys to be used while the screen is locked, e.g. adjust volume or skip to the next song without having to unlock the screen first
 

config.def.h

@@ -12,6 +12,9 @@ static const char *colorname[NUMCOLS] = {
 	#if PAMAUTH_PATCH
 	[PAM] =    "#9400D3",   /* waiting for PAM */
 	#endif // PAMAUTH_PATCH
+	#if KEYPRESS_FEEDBACK_PATCH
+	[BLOCKS] = "#ffffff",   /* key feedback block */
+	#endif // KEYPRESS_FEEDBACK_PATCH
 };
 
 #if XRESOURCES_PATCH
@@ -44,6 +47,19 @@ static const int controlkeyclear = 0;
 static const int monitortime = 5;
 #endif // DPMS_PATCH
 
+#if KEYPRESS_FEEDBACK_PATCH
+static short int blocks_enabled = 1; // 0 = don't show blocks
+static const int blocks_width = 0; // 0 = full width
+static const int blocks_height = 16;
+
+// position
+static const int blocks_x = 0;
+static const int blocks_y = 0;
+
+// Number of blocks
+static const int blocks_count = 10;
+#endif // KEYPRESS_FEEDBACK_PATCH
+
 #if MESSAGE_PATCH
 /* default message */
 static const char * message = "Suckless: Software that sucks less.";

patch/include.c

@@ -3,6 +3,10 @@
 #include "message.c"
 #endif
 
+#if KEYPRESS_FEEDBACK_PATCH
+#include "keypress_feedback.c"
+#endif
+
 #if PAMAUTH_PATCH
 #include "pamauth.c"
 #endif

patch/include.h

@@ -3,6 +3,10 @@
 #include "pamauth.h"
 #endif
 
+#if KEYPRESS_FEEDBACK_PATCH
+#include "keypress_feedback.h"
+#endif
+
 #if XRESOURCES_PATCH
 #include "xresources.h"
 #endif

patch/keypress_feedback.c

@@ -0,0 +1,28 @@
+static void
+draw_key_feedback(Display *dpy, struct lock **locks, int screen)
+{
+	XGCValues gr_values;
+
+	Window win = locks[screen]->win;
+	Window root_win;
+
+	gr_values.foreground = locks[screen]->colors[BLOCKS];
+	GC gc = XCreateGC(dpy, win, GCForeground, &gr_values);
+
+	int width = blocks_width, height = blocks_height;
+	if (blocks_height == 0 || blocks_width == 0) {
+		int _x, _y;
+		unsigned int screen_width, screen_height, _b, _d;
+		XGetGeometry(dpy, win, &root_win, &_x, &_y, &screen_width, &screen_height, &_b, &_d);
+		width = blocks_width ? blocks_width : screen_width;
+		height = blocks_height ? blocks_height : screen_height;
+	}
+
+	unsigned int block_width = width / blocks_count;
+	unsigned int position = rand() % blocks_count;
+
+	XClearWindow(dpy, win);
+	XFillRectangle(dpy, win, gc, blocks_x + position*block_width, blocks_y, width, height);
+
+	XFreeGC(dpy, gc);
+}

patch/keypress_feedback.h

@@ -0,0 +1 @@
+static void draw_key_feedback(Display *dpy, struct lock **locks, int screen);

patches.def.h

@@ -30,6 +30,12 @@
  */
 #define DPMS_PATCH 0
 
+/* Draws random blocks on the screen to display keypress feedback.
+ * https://tools.suckless.org/slock/patches/keypress-feedback/
+ * https://patch-diff.githubusercontent.com/raw/phenax/bslock/pull/2.diff
+ */
+#define KEYPRESS_FEEDBACK_PATCH 0
+
 /* This patch allows media keys to be used while the screen is locked. Allows for volume
  * to be adjusted or to skip to the next song without having to unlock the screen first.
  * https://tools.suckless.org/slock/patches/mediakeys/

slock.c

@@ -20,6 +20,9 @@
 #include <X11/Xutil.h>
 
 #include "patches.h"
+#if KEYPRESS_FEEDBACK_PATCH
+#include <time.h>
+#endif // KEYPRESS_FEEDBACK_PATCH
 #if CAPSCOLOR_PATCH
 #include <X11/XKBlib.h>
 #endif // CAPSCOLOR_PATCH
@@ -52,6 +55,9 @@ enum {
 	#if PAMAUTH_PATCH
 	PAM,
 	#endif // PAMAUTH_PATCH
+	#if KEYPRESS_FEEDBACK_PATCH
+	BLOCKS,
+	#endif // KEYPRESS_FEEDBACK_PATCH
 	NUMCOLS
 };
 
@@ -301,6 +307,11 @@ readpw(Display *dpy, struct xrandr *rr, struct lock **locks, int nscreens,
 					memcpy(passwd + len, buf, num);
 					len += num;
 				}
+				#if KEYPRESS_FEEDBACK_PATCH
+				if (blocks_enabled)
+					for (screen = 0; screen < nscreens; screen++)
+						draw_key_feedback(dpy, locks, screen);
+				#endif // KEYPRESS_FEEDBACK_PATCH
 				break;
 			}
 			#if CAPSCOLOR_PATCH
@@ -521,6 +532,11 @@ main(int argc, char **argv) {
 	config_init(dpy);
 	#endif // XRESOURCES_PATCH
 
+	#if KEYPRESS_FEEDBACK_PATCH
+	time_t t;
+	srand((unsigned) time(&t));
+	#endif // KEYPRESS_FEEDBACK_PATCH
+
 	/* check for Xrandr support */
 	rr.active = XRRQueryExtension(dpy, &rr.evbase, &rr.errbase);