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garbeam@0
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1 /*
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2 * (C)opyright MMVI Anselm R. Garbe <garbeam at gmail dot com>
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3 * See LICENSE file for license details.
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4 */
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5
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garbeam@76
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6 #include "dwm.h"
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garbeam@59
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7 #include <errno.h>
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garbeam@0
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8 #include <stdio.h>
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9 #include <stdlib.h>
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garbeam@57
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10 #include <string.h>
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garbeam@59
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11 #include <unistd.h>
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arg@138
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12 #include <sys/select.h>
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13 #include <X11/cursorfont.h>
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14 #include <X11/Xatom.h>
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15 #include <X11/Xproto.h>
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16
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garbeam@84
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17 /* static */
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18
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arg@123
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19 static int (*xerrorxlib)(Display *, XErrorEvent *);
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garbeam@75
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20 static Bool otherwm;
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21
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22 static void
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23 cleanup()
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24 {
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25 while(sel) {
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26 resize(sel, True, TopLeft);
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27 unmanage(sel);
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28 }
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29 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
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30 }
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31
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32 static void
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33 scan()
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34 {
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35 unsigned int i, num;
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36 Window *wins, d1, d2;
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37 XWindowAttributes wa;
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38
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39 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
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40 for(i = 0; i < num; i++) {
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41 if(!XGetWindowAttributes(dpy, wins[i], &wa))
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42 continue;
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43 if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
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44 continue;
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45 if(wa.map_state == IsViewable)
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46 manage(wins[i], &wa);
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47 }
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48 }
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49 if(wins)
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50 XFree(wins);
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51 }
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52
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53 static int
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54 win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
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55 {
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56 int status, format;
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57 unsigned long res, extra;
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58 Atom real;
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59
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60 status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
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61 &res, &extra, prop);
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62
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63 if(status != Success || *prop == 0) {
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64 return 0;
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65 }
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66 if(res == 0) {
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67 free((void *) *prop);
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68 }
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69 return res;
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70 }
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71
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72 /*
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73 * Startup Error handler to check if another window manager
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74 * is already running.
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75 */
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76 static int
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77 xerrorstart(Display *dsply, XErrorEvent *ee)
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78 {
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79 otherwm = True;
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80 return -1;
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81 }
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82
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garbeam@84
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83 /* extern */
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84
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85 char stext[1024];
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arg@146
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86 int tsel = DEFTAG;
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87 int screen, sx, sy, sw, sh, bx, by, bw, bh, mw;
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arg@178
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88 unsigned int ntags;
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garbeam@84
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89 Atom wmatom[WMLast], netatom[NetLast];
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90 Bool running = True;
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91 Bool issel = True;
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92 Client *clients = NULL;
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93 Client *sel = NULL;
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94 Cursor cursor[CurLast];
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95 Display *dpy;
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96 DC dc = {0};
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97 Window root, barwin;
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98
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99 int
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100 getproto(Window w)
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101 {
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102 int protos = 0;
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103 int i;
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104 long res;
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105 Atom *protocols;
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106
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107 res = win_property(w, wmatom[WMProtocols], XA_ATOM, 20L,
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108 ((unsigned char **)&protocols));
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109 if(res <= 0) {
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110 return protos;
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111 }
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112 for(i = 0; i < res; i++) {
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113 if(protocols[i] == wmatom[WMDelete])
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114 protos |= PROTODELWIN;
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115 }
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116 free((char *) protocols);
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117 return protos;
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118 }
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119
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120 void
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121 sendevent(Window w, Atom a, long value)
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122 {
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123 XEvent e;
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124
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125 e.type = ClientMessage;
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126 e.xclient.window = w;
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127 e.xclient.message_type = a;
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128 e.xclient.format = 32;
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129 e.xclient.data.l[0] = value;
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130 e.xclient.data.l[1] = CurrentTime;
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131 XSendEvent(dpy, w, False, NoEventMask, &e);
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132 XSync(dpy, False);
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133 }
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134
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135 void
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136 quit(Arg *arg)
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137 {
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138 running = False;
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139 }
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140
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141 /*
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142 * There's no way to check accesses to destroyed windows, thus those cases are
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143 * ignored (especially on UnmapNotify's). Other types of errors call Xlibs
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144 * default error handler, which calls exit().
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145 */
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146 int
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147 xerror(Display *dpy, XErrorEvent *ee)
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148 {
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149 if(ee->error_code == BadWindow
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150 || (ee->request_code == X_SetInputFocus && ee->error_code == BadMatch)
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151 || (ee->request_code == X_PolyText8 && ee->error_code == BadDrawable)
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152 || (ee->request_code == X_PolyFillRectangle && ee->error_code == BadDrawable)
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153 || (ee->request_code == X_PolySegment && ee->error_code == BadDrawable)
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154 || (ee->request_code == X_ConfigureWindow && ee->error_code == BadMatch)
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155 || (ee->request_code == X_GrabKey && ee->error_code == BadAccess))
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156 return 0;
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157 fprintf(stderr, "dwm: fatal error: request code=%d, error code=%d\n",
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158 ee->request_code, ee->error_code);
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159 return xerrorxlib(dpy, ee); /* may call exit() */
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160 }
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161
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162 int
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163 main(int argc, char *argv[])
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164 {
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165 int i;
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166 unsigned int mask;
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167 fd_set rd;
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168 Bool readin = True;
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169 Window w;
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170 XEvent ev;
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171 XSetWindowAttributes wa;
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172
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173 if(argc == 2 && !strncmp("-v", argv[1], 3)) {
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174 fputs("dwm-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
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175 exit(EXIT_SUCCESS);
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176 }
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177 else if(argc != 1)
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178 eprint("usage: dwm [-v]\n");
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179
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180 dpy = XOpenDisplay(0);
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181 if(!dpy)
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182 eprint("dwm: cannot open display\n");
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183
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184 screen = DefaultScreen(dpy);
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185 root = RootWindow(dpy, screen);
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186
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187 otherwm = False;
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188 XSetErrorHandler(xerrorstart);
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189 /* this causes an error if some other window manager is running */
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190 XSelectInput(dpy, root, SubstructureRedirectMask);
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191 XSync(dpy, False);
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192
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193 if(otherwm)
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194 eprint("dwm: another window manager is already running\n");
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195
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196 XSetErrorHandler(NULL);
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197 xerrorxlib = XSetErrorHandler(xerror);
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198
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199 /* init atoms */
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200 wmatom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
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201 wmatom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
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202 netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
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203 netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
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204 XChangeProperty(dpy, root, netatom[NetSupported], XA_ATOM, 32,
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205 PropModeReplace, (unsigned char *) netatom, NetLast);
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206
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207 /* init cursors */
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208 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
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209 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
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210 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
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211
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212 grabkeys();
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213 initrregs();
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214
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215 for(ntags = 0; tags[ntags]; ntags++);
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216
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217 /* style */
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218 dc.bg = getcolor(BGCOLOR);
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219 dc.fg = getcolor(FGCOLOR);
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220 dc.border = getcolor(BORDERCOLOR);
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221 setfont(FONT);
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222
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223 sx = sy = 0;
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224 sw = DisplayWidth(dpy, screen);
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225 sh = DisplayHeight(dpy, screen);
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226 mw = (sw * MASTERW) / 100;
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227
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228 wa.override_redirect = 1;
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229 wa.background_pixmap = ParentRelative;
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230 wa.event_mask = ButtonPressMask | ExposureMask;
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231
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232 bx = by = 0;
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233 bw = sw;
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234 dc.h = bh = dc.font.height + 4;
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235 barwin = XCreateWindow(dpy, root, bx, by, bw, bh, 0, DefaultDepth(dpy, screen),
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236 CopyFromParent, DefaultVisual(dpy, screen),
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237 CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
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238 XDefineCursor(dpy, barwin, cursor[CurNormal]);
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239 XMapRaised(dpy, barwin);
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240
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241 dc.drawable = XCreatePixmap(dpy, root, sw, bh, DefaultDepth(dpy, screen));
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242 dc.gc = XCreateGC(dpy, root, 0, 0);
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243
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244 strcpy(stext, "dwm-"VERSION);
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245 drawstatus();
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246
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247 issel = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
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248
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249 wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
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250 wa.cursor = cursor[CurNormal];
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251 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
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252
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253 scan();
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254
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255 /* main event loop, also reads status text from stdin */
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256 while(running) {
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257 FD_ZERO(&rd);
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258 if(readin)
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259 FD_SET(STDIN_FILENO, &rd);
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260 FD_SET(ConnectionNumber(dpy), &rd);
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261
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262 i = select(ConnectionNumber(dpy) + 1, &rd, 0, 0, 0);
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263 if(i == -1 && errno == EINTR)
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264 continue;
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265 if(i < 0)
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266 eprint("select failed\n");
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267 else if(i > 0) {
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268 if(FD_ISSET(ConnectionNumber(dpy), &rd)) {
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269 while(XPending(dpy)) {
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270 XNextEvent(dpy, &ev);
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271 if(handler[ev.type])
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272 (handler[ev.type])(&ev); /* call handler */
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273 }
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274 }
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275 if(readin && FD_ISSET(STDIN_FILENO, &rd)) {
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276 readin = NULL != fgets(stext, sizeof(stext), stdin);
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277 if(readin)
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278 stext[strlen(stext) - 1] = 0;
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279 else
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280 strcpy(stext, "broken pipe");
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281 drawstatus();
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282 }
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283 }
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284 }
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285
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286 cleanup();
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287 XCloseDisplay(dpy);
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288
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289 return 0;
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290 }
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