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[dwm.git] / tag.c
1 /* See LICENSE file for copyright and license details. */
2 #include "dwm.h"
3 #include <regex.h>
4 #include <stdio.h>
5 #include <stdlib.h>
6 #include <string.h>
7 #include <X11/Xatom.h>
8 #include <X11/Xutil.h>
9
10 /* static */
11
12 typedef struct {
13         const char *prop;
14         const char *tags;
15         Bool isfloating;
16 } Rule;
17
18 typedef struct {
19         regex_t *propregex;
20         regex_t *tagregex;
21 } Regs;
22
23 TAGS
24 RULES
25
26 static Regs *regs = NULL;
27 static unsigned int nrules = 0;
28 static char prop[512];
29
30 static void
31 persistconfig(Client *c) {
32         unsigned int i;
33
34         for(i = 0; i < ntags && i < sizeof prop - 1; i++)
35                 prop[i] = c->tags[i] ? '1' : '0';
36         if(i < sizeof prop - 1)
37                 prop[i++] = c->isfloating ? '1' : '0';
38         prop[i] = '\0';
39         XChangeProperty(dpy, c->win, dwmconfig, XA_STRING, 8,
40                         PropModeReplace, (unsigned char *)prop, i);
41 }
42
43 /* extern */
44
45 void
46 compileregs(void) {
47         unsigned int i;
48         regex_t *reg;
49
50         if(regs)
51                 return;
52         nrules = sizeof rule / sizeof rule[0];
53         regs = emallocz(nrules * sizeof(Regs));
54         for(i = 0; i < nrules; i++) {
55                 if(rule[i].prop) {
56                         reg = emallocz(sizeof(regex_t));
57                         if(regcomp(reg, rule[i].prop, REG_EXTENDED))
58                                 free(reg);
59                         else
60                                 regs[i].propregex = reg;
61                 }
62                 if(rule[i].tags) {
63                         reg = emallocz(sizeof(regex_t));
64                         if(regcomp(reg, rule[i].tags, REG_EXTENDED))
65                                 free(reg);
66                         else
67                                 regs[i].tagregex = reg;
68                 }
69         }
70 }
71
72 Bool
73 isvisible(Client *c) {
74         unsigned int i;
75
76         for(i = 0; i < ntags; i++)
77                 if(c->tags[i] && seltag[i])
78                         return True;
79         return False;
80 }
81
82 void
83 settags(Client *c, Client *trans) {
84         unsigned int i, j;
85         regmatch_t tmp;
86         Bool matched = trans != NULL;
87         XClassHint ch = { 0 };
88         XTextProperty name;
89
90         if(matched) {
91                 for(i = 0; i < ntags; i++)
92                         c->tags[i] = trans->tags[i];
93         }
94         else {
95                 /* check if window has set a property */
96                 name.nitems = 0;
97                 XGetTextProperty(dpy, c->win, &name, dwmconfig);
98                 if(name.nitems && name.encoding == XA_STRING) {
99                         strncpy(prop, (char *)name.value, sizeof prop - 1);
100                         prop[sizeof prop - 1] = '\0';
101                         XFree(name.value);
102                         for(i = 0; i < ntags && i < sizeof prop - 1 && prop[i] != '\0'; i++)
103                                 if((c->tags[i] = prop[i] == '1'))
104                                         matched = True;
105                         if(i < sizeof prop - 1 && prop[i] != '\0')
106                                 c->isfloating = prop[i] == '1';
107                 }
108         }
109         if(!matched) {
110                 /* rule matching */
111                 XGetClassHint(dpy, c->win, &ch);
112                 snprintf(prop, sizeof prop, "%s:%s:%s",
113                                 ch.res_class ? ch.res_class : "",
114                                 ch.res_name ? ch.res_name : "", c->name);
115                 for(i = 0; i < nrules; i++)
116                         if(regs[i].propregex && !regexec(regs[i].propregex, prop, 1, &tmp, 0)) {
117                                 c->isfloating = rule[i].isfloating;
118                                 for(j = 0; regs[i].tagregex && j < ntags; j++) {
119                                         if(!regexec(regs[i].tagregex, tags[j], 1, &tmp, 0)) {
120                                                 matched = True;
121                                                 c->tags[j] = True;
122                                         }
123                                 }
124                         }
125                 if(ch.res_class)
126                         XFree(ch.res_class);
127                 if(ch.res_name)
128                         XFree(ch.res_name);
129         }
130         if(!matched)
131                 for(i = 0; i < ntags; i++)
132                         c->tags[i] = seltag[i];
133         persistconfig(c);
134 }
135
136 void
137 tag(const char *arg) {
138         int i;
139
140         if(!sel)
141                 return;
142         for(i = 0; i < ntags; i++)
143                 sel->tags[i] = arg == NULL;
144         i = arg ? atoi(arg) : 0;
145         if(i >= 0 && i < ntags)
146                 sel->tags[i] = True;
147         if(sel)
148                 persistconfig(sel);
149         arrange();
150 }
151
152 void
153 togglefloating(const char *arg) {
154         if(!sel || isfloating())
155                 return;
156         sel->isfloating = !sel->isfloating;
157         if(sel->isfloating)
158                 resize(sel, sel->x, sel->y, sel->w, sel->h, True);
159         arrange();
160 }
161
162 void
163 toggletag(const char *arg) {
164         int i, j;
165
166         if(!sel)
167                 return;
168         i = arg ? atoi(arg) : 0;
169         sel->tags[i] = !sel->tags[i];
170         for(j = 0; j < ntags && !sel->tags[j]; j++);
171         if(j == ntags)
172                 sel->tags[i] = True;
173         if(sel)
174                 persistconfig(sel);
175         arrange();
176 }
177
178 void
179 toggleview(const char *arg) {
180         int i, j;
181
182         i = arg ? atoi(arg) : 0;
183         seltag[i] = !seltag[i];
184         for(j = 0; j < ntags && !seltag[j]; j++);
185         if(j == ntags)
186                 seltag[i] = True; /* cannot toggle last view */
187         arrange();
188 }
189
190 void
191 view(const char *arg) {
192         int i;
193
194         for(i = 0; i < ntags; i++)
195                 seltag[i] = arg == NULL;
196         i = arg ? atoi(arg) : 0;
197         if(i >= 0 && i < ntags)
198                 seltag[i] = True;
199         arrange();
200 }