split screen.c into layout.c and tag.c (because the view is an implicit mixture of both)

Makefile

@@ -3,7 +3,7 @@
 
 include config.mk
 
-SRC = client.c event.c main.c screen.c util.c
+SRC = client.c event.c layout.c main.c tag.c util.c
 OBJ = ${SRC:.c=.o}
 
 all: options dwm

dwm.h

@@ -120,6 +120,15 @@ extern void zoom(Arg *arg);			/* zooms the focused client to master area, arg is
 /* event.c */
 extern void grabkeys(void);			/* grab all keys defined in config.h */
 
+/* layout.c */
+extern void incnmaster(Arg *arg);		/* increments nmaster with arg's index value */
+extern void initlayouts(void);			/* initialize layout array */
+extern void resizemaster(Arg *arg);		/* resizes the master percent with arg's index value */
+extern void restack(void);			/* restores z layers of all clients */
+extern void setlayout(Arg *arg);		/* sets layout, -1 toggles */
+extern void toggleversatile(Arg *arg);		/* toggles focusesd client between versatile/and non-versatile state */
+extern void versatile(void);			/* arranges all windows versatile */
+
 /* main.c */
 extern void drawstatus(void);			/* draw the bar */
 extern unsigned int textw(const char *text);	/* return the width of text in px*/
@@ -127,20 +136,13 @@ extern void quit(Arg *arg);			/* quit dwm nicely */
 extern void sendevent(Window w, Atom a, long value);	/* send synthetic event to w */
 extern int xerror(Display *dsply, XErrorEvent *ee);	/* dwm's X error handler */
 
-/* screen.c */
+/* tag.c */
 extern void compileregs(void);			/* initialize regexps of rules defined in config.h */
-extern void incnmaster(Arg *arg);		/* increments nmaster with arg's index value */
-extern void initlayouts(void);			/* initialize layout array */
 extern Bool isvisible(Client *c);		/* returns True if client is visible */
-extern void resizemaster(Arg *arg);		/* resizes the master percent with arg's index value */
-extern void restack(void);			/* restores z layers of all clients */
-extern void setlayout(Arg *arg);		/* sets layout, -1 toggles */
 extern void settags(Client *c, Client *trans);	/* sets tags of c */
 extern void tag(Arg *arg);			/* tags c with arg's index */
-extern void toggleversatile(Arg *arg);		/* toggles focusesd client between versatile/and non-versatile state */
 extern void toggletag(Arg *arg);		/* toggles c tags with arg's index */
 extern void toggleview(Arg *arg);		/* toggles the tag with arg's index (in)visible */
-extern void versatile(void);			/* arranges all windows versatile */
 extern void view(Arg *arg);			/* views the tag with arg's index */
 
 /* util.c */

tag.c

@@ -0,0 +1,149 @@
+/* (C)opyright MMVI-MMVII Anselm R. Garbe <garbeam at gmail dot com>
+ * See LICENSE file for license details.
+ */
+#include "dwm.h"
+#include <regex.h>
+#include <stdio.h>
+#include <X11/Xutil.h>
+
+/* static */
+
+typedef struct {
+	const char *prop;
+	const char *tags;
+	Bool isversatile;
+} Rule;
+
+typedef struct {
+	regex_t *propregex;
+	regex_t *tagregex;
+} Regs;
+
+TAGS
+RULES
+
+static Regs *regs = NULL;
+static unsigned int nrules = 0;
+
+/* extern */
+
+void
+compileregs(void) {
+	unsigned int i;
+	regex_t *reg;
+
+	if(regs)
+		return;
+	nrules = sizeof rule / sizeof rule[0];
+	regs = emallocz(nrules * sizeof(Regs));
+	for(i = 0; i < nrules; i++) {
+		if(rule[i].prop) {
+			reg = emallocz(sizeof(regex_t));
+			if(regcomp(reg, rule[i].prop, REG_EXTENDED))
+				free(reg);
+			else
+				regs[i].propregex = reg;
+		}
+		if(rule[i].tags) {
+			reg = emallocz(sizeof(regex_t));
+			if(regcomp(reg, rule[i].tags, REG_EXTENDED))
+				free(reg);
+			else
+				regs[i].tagregex = reg;
+		}
+	}
+}
+
+Bool
+isvisible(Client *c) {
+	unsigned int i;
+
+	for(i = 0; i < ntags; i++)
+		if(c->tags[i] && seltag[i])
+			return True;
+	return False;
+}
+
+void
+settags(Client *c, Client *trans) {
+	char prop[512];
+	unsigned int i, j;
+	regmatch_t tmp;
+	Bool matched = trans != NULL;
+	XClassHint ch = { 0 };
+
+	if(matched)
+		for(i = 0; i < ntags; i++)
+			c->tags[i] = trans->tags[i];
+	else {
+		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->isversatile = rule[i].isversatile;
+				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] = seltag[i];
+}
+
+void
+tag(Arg *arg) {
+	unsigned int i;
+
+	if(!sel)
+		return;
+	for(i = 0; i < ntags; i++)
+		sel->tags[i] = (arg->i == -1) ? True : False;
+	if(arg->i >= 0 && arg->i < ntags)
+		sel->tags[arg->i] = True;
+	lt->arrange();
+}
+
+void
+toggletag(Arg *arg) {
+	unsigned int i;
+
+	if(!sel)
+		return;
+	sel->tags[arg->i] = !sel->tags[arg->i];
+	for(i = 0; i < ntags && !sel->tags[i]; i++);
+	if(i == ntags)
+		sel->tags[arg->i] = True;
+	lt->arrange();
+}
+
+void
+toggleview(Arg *arg) {
+	unsigned int i;
+
+	seltag[arg->i] = !seltag[arg->i];
+	for(i = 0; i < ntags && !seltag[i]; i++);
+	if(i == ntags)
+		seltag[arg->i] = True; /* cannot toggle last view */
+	lt->arrange();
+}
+
+void
+view(Arg *arg) {
+	unsigned int i;
+
+	for(i = 0; i < ntags; i++)
+		seltag[i] = (arg->i == -1) ? True : False;
+	if(arg->i >= 0 && arg->i < ntags)
+		seltag[arg->i] = True;
+	lt->arrange();
+}