--- /dev/null
+/* See LICENSE file for copyright and license details. */
+#include "dwm.h"
+#include <regex.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xatom.h>
+#include <X11/Xutil.h>
+
+/* static */
+
+typedef struct {
+ const char *symbol;
+ void (*arrange)(void);
+} Layout;
+
+typedef struct {
+ const char *prop;
+ const char *tags;
+ Bool isfloating;
+} Rule;
+
+typedef struct {
+ regex_t *propregex;
+ regex_t *tagregex;
+} Regs;
+
+TAGS
+RULES
+
+static char prop[512];
+static unsigned int nrules = 0;
+static unsigned int nlayouts = 0;
+static unsigned int ltidx = 0; /* default */
+static Regs *regs = NULL;
+
+static unsigned int
+idxoftag(const char *tag) {
+ unsigned int i;
+
+ for(i = 0; i < ntags; i++)
+ if(tags[i] == tag)
+ return i;
+ return 0;
+}
+
+static void
+floating(void) { /* default floating layout */
+ Client *c;
+
+ for(c = clients; c; c = c->next)
+ if(isvisible(c))
+ resize(c, c->x, c->y, c->w, c->h, True);
+}
+
+static void
+setdwmprops(void) {
+ unsigned int i;
+
+ for(i = 0; i < ntags && i < sizeof prop - 1; i++)
+ prop[i] = seltags[i] ? '1' : '0';
+ if(i < sizeof prop - 1)
+ prop[i++] = (char)ltidx;
+ prop[i] = '\0';
+ XChangeProperty(dpy, root, dwmprops, XA_STRING, 8,
+ PropModeReplace, (unsigned char *)prop, i);
+}
+
+LAYOUTS
+
+/* extern */
+
+unsigned int blw = 0;
+
+void
+applyrules(Client *c) {
+ unsigned int i, j;
+ regmatch_t tmp;
+ Bool matched = False;
+ XClassHint ch = { 0 };
+
+ /* rule matching */
+ XGetClassHint(dpy, c->win, &ch);
+ snprintf(prop, sizeof prop, "%s:%s:%s",
+ ch.res_class ? ch.res_class : "",
+ ch.res_name ? ch.res_name : "", c->name);
+ for(i = 0; i < nrules; i++)
+ if(regs[i].propregex && !regexec(regs[i].propregex, prop, 1, &tmp, 0)) {
+ c->isfloating = rules[i].isfloating;
+ for(j = 0; regs[i].tagregex && j < ntags; j++) {
+ if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
+ matched = True;
+ c->tags[j] = True;
+ }
+ }
+ }
+ if(ch.res_class)
+ XFree(ch.res_class);
+ if(ch.res_name)
+ XFree(ch.res_name);
+ if(!matched)
+ for(i = 0; i < ntags; i++)
+ c->tags[i] = seltags[i];
+}
+
+void
+arrange(void) {
+ Client *c;
+
+ for(c = clients; c; c = c->next)
+ if(isvisible(c))
+ unban(c);
+ else
+ ban(c);
+ layouts[ltidx].arrange();
+ focus(NULL);
+ restack();
+}
+
+void
+compileregs(void) {
+ unsigned int i;
+ regex_t *reg;
+
+ if(regs)
+ return;
+ nrules = sizeof rules / sizeof rules[0];
+ regs = emallocz(nrules * sizeof(Regs));
+ for(i = 0; i < nrules; i++) {
+ if(rules[i].prop) {
+ reg = emallocz(sizeof(regex_t));
+ if(regcomp(reg, rules[i].prop, REG_EXTENDED))
+ free(reg);
+ else
+ regs[i].propregex = reg;
+ }
+ if(rules[i].tags) {
+ reg = emallocz(sizeof(regex_t));
+ if(regcomp(reg, rules[i].tags, REG_EXTENDED))
+ free(reg);
+ else
+ regs[i].tagregex = reg;
+ }
+ }
+}
+
+void
+focusnext(const char *arg) {
+ Client *c;
+
+ if(!sel)
+ return;
+ for(c = sel->next; c && !isvisible(c); c = c->next);
+ if(!c)
+ for(c = clients; c && !isvisible(c); c = c->next);
+ if(c) {
+ focus(c);
+ restack();
+ }
+}
+
+void
+focusprev(const char *arg) {
+ Client *c;
+
+ if(!sel)
+ return;
+ for(c = sel->prev; c && !isvisible(c); c = c->prev);
+ if(!c) {
+ for(c = clients; c && c->next; c = c->next);
+ for(; c && !isvisible(c); c = c->prev);
+ }
+ if(c) {
+ focus(c);
+ restack();
+ }
+}
+
+const char *
+getsymbol(void)
+{
+ return layouts[ltidx].symbol;
+}
+
+void
+initlayouts(void) {
+ unsigned int i, w;
+
+ nlayouts = sizeof layouts / sizeof layouts[0];
+ for(blw = i = 0; i < nlayouts; i++) {
+ w = textw(layouts[i].symbol);
+ if(w > blw)
+ blw = w;
+ }
+}
+
+Bool
+isfloating(void) {
+ return layouts[ltidx].arrange == floating;
+}
+
+Bool
+isarrange(void (*func)())
+{
+ return func == layouts[ltidx].arrange;
+}
+
+Bool
+isvisible(Client *c) {
+ unsigned int i;
+
+ for(i = 0; i < ntags; i++)
+ if(c->tags[i] && seltags[i])
+ return True;
+ return False;
+}
+
+void
+getdwmprops(void) {
+ unsigned int i;
+
+ if(gettextprop(root, dwmprops, prop, sizeof prop)) {
+ for(i = 0; i < ntags && i < sizeof prop - 1 && prop[i] != '\0'; i++)
+ seltags[i] = prop[i] == '1';
+ if(i < sizeof prop - 1 && prop[i] != '\0') {
+ if(prop[i] < nlayouts)
+ ltidx = prop[i];
+ }
+ }
+}
+
+Client *
+nexttiled(Client *c) {
+ for(; c && (c->isfloating || !isvisible(c)); c = c->next);
+ return c;
+}
+
+void
+restack(void) {
+ Client *c;
+ XEvent ev;
+ XWindowChanges wc;
+
+ drawstatus();
+ if(!sel)
+ return;
+ if(sel->isfloating || isfloating())
+ XRaiseWindow(dpy, sel->win);
+ if(!isfloating()) {
+ wc.stack_mode = Below;
+ wc.sibling = barwin;
+ if(!sel->isfloating) {
+ XConfigureWindow(dpy, sel->win, CWSibling | CWStackMode, &wc);
+ wc.sibling = sel->win;
+ }
+ for(c = nexttiled(clients); c; c = nexttiled(c->next)) {
+ if(c == sel)
+ continue;
+ XConfigureWindow(dpy, c->win, CWSibling | CWStackMode, &wc);
+ wc.sibling = c->win;
+ }
+ }
+ XSync(dpy, False);
+ while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
+
+void
+setlayout(const char *arg) {
+ int i;
+
+ if(!arg) {
+ if(++ltidx == nlayouts)
+ ltidx = 0;;
+ }
+ else {
+ i = atoi(arg);
+ if(i < 0 || i >= nlayouts)
+ return;
+ ltidx = i;
+ }
+ if(sel)
+ arrange();
+ else
+ drawstatus();
+ setdwmprops();
+}
+
+void
+tag(const char *arg) {
+ unsigned int i;
+
+ if(!sel)
+ return;
+ for(i = 0; i < ntags; i++)
+ sel->tags[i] = arg == NULL;
+ i = idxoftag(arg);
+ if(i >= 0 && i < ntags)
+ sel->tags[i] = True;
+ setprops(sel);
+ arrange();
+}
+
+void
+togglebar(const char *arg) {
+ if(bpos == BarOff)
+ bpos = (BARPOS == BarOff) ? BarTop : BARPOS;
+ else
+ bpos = BarOff;
+ updatebarpos();
+ arrange();
+}
+
+void
+togglefloating(const char *arg) {
+ if(!sel || isfloating())
+ return;
+ sel->isfloating = !sel->isfloating;
+ if(sel->isfloating) {
+ resize(sel, sel->x, sel->y, sel->w, sel->h, True);
+ setprops(sel);
+ }
+ arrange();
+}
+
+void
+togglemax(const char *arg) {
+ XEvent ev;
+
+ if(!sel || (!isfloating() && !sel->isfloating) || sel->isfixed)
+ return;
+ if((sel->ismax = !sel->ismax)) {
+ sel->rx = sel->x;
+ sel->ry = sel->y;
+ sel->rw = sel->w;
+ sel->rh = sel->h;
+ resize(sel, wax, way, waw - 2 * sel->border, wah - 2 * sel->border, True);
+ }
+ else
+ resize(sel, sel->rx, sel->ry, sel->rw, sel->rh, True);
+ drawstatus();
+ while(XCheckMaskEvent(dpy, EnterWindowMask, &ev));
+}
+
+void
+toggletag(const char *arg) {
+ unsigned int i, j;
+
+ if(!sel)
+ return;
+ i = idxoftag(arg);
+ sel->tags[i] = !sel->tags[i];
+ for(j = 0; j < ntags && !sel->tags[j]; j++);
+ if(j == ntags)
+ sel->tags[i] = True;
+ setprops(sel);
+ arrange();
+}
+
+void
+toggleview(const char *arg) {
+ unsigned int i, j;
+
+ i = idxoftag(arg);
+ seltags[i] = !seltags[i];
+ for(j = 0; j < ntags && !seltags[j]; j++);
+ if(j == ntags)
+ seltags[i] = True; /* cannot toggle last view */
+ setdwmprops();
+ arrange();
+}
+
+void
+view(const char *arg) {
+ unsigned int i;
+
+ for(i = 0; i < ntags; i++)
+ seltags[i] = arg == NULL;
+ i = idxoftag(arg);
+ if(i >= 0 && i < ntags)
+ seltags[i] = True;
+ setdwmprops();
+ arrange();
+}
Got questions, comments, patches, etc.? Contact Jason Woofenden