Blank the screen with color 0, add third color for failed logins

- Adds another color in config.def.h, COLOR_INIT
- Renames the colours from numerical ones to ones with meaningful names;
  COLOR_INPUT for when there is content in the input buffer and COLOR_EMPTY
  for when the input buffer has been cleared (backspaced or a failed attempt).
- Ensures XFreeColors frees the right number of colours. This is now derived
  from the size of `Lock->colors` rather than being an integer literal.
- Makes slock exhibit the behaviour described by Markus

The default colours are the same as the ones slock currently uses, with the
exception of the new color, which I have set to red, as it indicates someone
has either failed an attempt to unlock, or that they have entered input and
erased it all.

diff --git a/config.def.h b/config.def.h
index 89e5977..4bccb5d 100644 (file)
--- a/config.def.h
+++ b/config.def.h
@@ -1,2 +1,5 @@
-#define COLOR1 "black"
-#define COLOR2 "#005577"
+static const char *colorname[NUMCOLS] = {
+       "black",     /* after initialization */
+       "#005577",   /* during input */
+       "#CC3333",   /* failed/cleared the input */
+};

diff --git a/slock.c b/slock.c
index 407a540..df5c3fe 100644 (file)
--- a/slock.c
+++ b/slock.c
@@ -22,13 +22,20 @@
 #include <bsd_auth.h>
 #endif
 
+enum {
+       INIT,
+       INPUT,
+       EMPTY,
+       NUMCOLS
+};
+
 #include "config.h"
 
 typedef struct {
        int screen;
        Window root, win;
        Pixmap pmap;
-       unsigned long colors[2];
+       unsigned long colors[NUMCOLS];
 } Lock;
 
 static Lock **locks;
@@ -162,12 +169,12 @@ readpw(Display *dpy, const char *pws)
                        }
                        if (llen == 0 && len != 0) {
                                for (screen = 0; screen < nscreens; screen++) {
-                                       XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[1]);
+                                       XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[INPUT]);
                                        XClearWindow(dpy, locks[screen]->win);
                                }
                        } else if (llen != 0 && len == 0) {
                                for (screen = 0; screen < nscreens; screen++) {
-                                       XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[0]);
+                                       XSetWindowBackground(dpy, locks[screen]->win, locks[screen]->colors[EMPTY]);
                                        XClearWindow(dpy, locks[screen]->win);
                                }
                        }
@@ -185,7 +192,7 @@ unlockscreen(Display *dpy, Lock *lock)
                return;
 
        XUngrabPointer(dpy, CurrentTime);
-       XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, 2, 0);
+       XFreeColors(dpy, DefaultColormap(dpy, lock->screen), lock->colors, NUMCOLS, 0);
        XFreePixmap(dpy, lock->pmap);
        XDestroyWindow(dpy, lock->win);
 
@@ -197,6 +204,7 @@ lockscreen(Display *dpy, int screen)
 {
        char curs[] = {0, 0, 0, 0, 0, 0, 0, 0};
        unsigned int len;
+       int i;
        Lock *lock;
        XColor color, dummy;
        XSetWindowAttributes wa;
@@ -213,16 +221,17 @@ lockscreen(Display *dpy, int screen)
 
        lock->root = RootWindow(dpy, lock->screen);
 
+       for (i = 0; i < NUMCOLS; i++) {
+               XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), colorname[i], &color, &dummy);
+               lock->colors[i] = color.pixel;
+       }
+
        /* init */
        wa.override_redirect = 1;
-       wa.background_pixel = BlackPixel(dpy, lock->screen);
+       wa.background_pixel = lock->colors[INIT];
        lock->win = XCreateWindow(dpy, lock->root, 0, 0, DisplayWidth(dpy, lock->screen), DisplayHeight(dpy, lock->screen),
                                  0, DefaultDepth(dpy, lock->screen), CopyFromParent,
                                  DefaultVisual(dpy, lock->screen), CWOverrideRedirect | CWBackPixel, &wa);
-       XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR2, &color, &dummy);
-       lock->colors[1] = color.pixel;
-       XAllocNamedColor(dpy, DefaultColormap(dpy, lock->screen), COLOR1, &color, &dummy);
-       lock->colors[0] = color.pixel;
        lock->pmap = XCreateBitmapFromData(dpy, lock->win, curs, 8, 8);
        invisible = XCreatePixmapCursor(dpy, lock->pmap, lock->pmap, &color, &color, 0, 0);
        XDefineCursor(dpy, lock->win, invisible);