[dwm] View-previous-tags patch ported to dwm-4.5.

[Antoni Grzymala]

Hi,

recently yiyus wrote a lovely patch based upon my idea (in turn based
upon GNU screen's behaviour of jumping between two terminals with one
keystroke). See previous postings on the subject for more discussion.

Attached please find the patch ported to dwm-4.5.

I really think it would be very useful to have that functionality in
mainline dwm. It's extremely productive. Arg, what do you think?

Best,

[a]

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. Antoni Grzymala - antoni (at) chopin.edu.pl -------------------.
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diff -Naur dwm-4.5/config.h dwm-4.5-new/config.h
--- dwm-4.5/config.h    2007-09-22 09:11:13.000000000 +0200
+++ dwm-4.5-new/config.h        2007-10-08 13:22:05.322096203 +0200
@@ -51,6 +51,7 @@
        { MODKEY,                       XK_Return,      zoom,           NULL }, 
\
        { MODKEY|ShiftMask,             XK_space,       togglefloating, NULL }, 
\
        { MODKEY|ShiftMask,             XK_c,           killclient,     NULL }, 
\
+  { MODKEY,     XK_Tab,    viewprevtag,    NULL }, \
        { MODKEY,                       XK_0,           view,           NULL }, 
\
        { MODKEY,                       XK_1,           view,           tags[0] 
}, \
        { MODKEY,                       XK_2,           view,           tags[1] 
}, \
diff -Naur dwm-4.5/dwm.c dwm-4.5-new/dwm.c
--- dwm-4.5/dwm.c       2007-09-22 09:11:13.000000000 +0200
+++ dwm-4.5-new/dwm.c   2007-10-08 13:20:48.322222876 +0200
@@ -184,6 +184,7 @@
 void updatesizehints(Client *c);
 void updatetitle(Client *c);
 void view(const char *arg);
+void viewprevtag(const char *arg);     /* views previous selected tags */
 int xerror(Display *dpy, XErrorEvent *ee);
 int xerrordummy(Display *dsply, XErrorEvent *ee);
 int xerrorstart(Display *dsply, XErrorEvent *ee);
@@ -218,6 +219,7 @@
 Bool otherwm, readin;
 Bool running = True;
 Bool *seltags;
+Bool *prevtags;
 Bool selscreen = True;
 Client *clients = NULL;
 Client *sel = NULL;
@@ -393,6 +395,7 @@
        XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
        XSync(dpy, False);
        free(seltags);
+  free(prevtags);
 }
 
 void
@@ -1468,7 +1471,9 @@
        compileregs();
        for(ntags = 0; tags[ntags]; ntags++);
        seltags = emallocz(sizeof(Bool) * ntags);
+       prevtags = emallocz(sizeof(Bool) * ntags);
        seltags[0] = True;
+       prevtags[0] = True;
 
        /* init appearance */
        dc.norm[ColBorder] = getcolor(NORMBORDERCOLOR);
@@ -1838,8 +1843,10 @@
 view(const char *arg) {
        unsigned int i;
 
-       for(i = 0; i < ntags; i++)
+       for(i = 0; i < ntags; i++) {
+    prevtags[i] = seltags[i];
                seltags[i] = arg == NULL;
+  }
        i = idxoftag(arg);
        if(i >= 0 && i < ntags)
                seltags[i] = True;
@@ -1847,6 +1854,19 @@
 }
 
 void
+viewprevtag(const char *arg) {
+       unsigned int i;
+       Bool t;
+
+       for(i = 0; i < ntags; i++) {
+               t = seltags[i];
+               seltags[i] = prevtags[i];
+               prevtags[i] = t;
+       }
+       arrange();
+}
+
+void
 zoom(const char *arg) {
        Client *c;
 

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