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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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6 #include <stdarg.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9
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10 #include <X11/cursorfont.h>
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11 #include <X11/Xatom.h>
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12 #include <X11/Xproto.h>
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13
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14 #include "wm.h"
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15
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16 Display *dpy;
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17 Window root;
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18 XRectangle rect;
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19 int screen, sel_screen;
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20 Atom wm_atom[WMLast];
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21 Atom net_atom[NetLast];
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22 Cursor cursor[CurLast];
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23 unsigned int kmask, numlock_mask;
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24 Pixmap pmap;
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25
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26 enum { WM_PROTOCOL_DELWIN = 1 };
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27
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28 static Bool other_wm_running;
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29 static int (*x_error_handler) (Display *, XErrorEvent *);
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30 static char version[] = "gridwm - " VERSION ", (C)opyright MMVI Anselm R. Garbe\n";
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31
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32 static void
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33 usage()
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34 {
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35 fputs("usage: gridwm [-v]\n", stderr);
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36 exit(1);
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37 }
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38
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39 void
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40 error(char *errstr, ...) {
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41 va_list ap;
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42 va_start(ap, errstr);
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43 vfprintf(stderr, errstr, ap);
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44 va_end(ap);
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45 exit(1);
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46 }
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47
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48 static void
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49 scan_wins()
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50 {
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51 unsigned int i, num;
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52 Window *wins;
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53 XWindowAttributes wa;
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54 Window d1, d2;
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55
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56 if(XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
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57 for(i = 0; i < num; i++) {
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58 if(!XGetWindowAttributes(dpy, wins[i], &wa))
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59 continue;
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60 if(wa.override_redirect || XGetTransientForHint(dpy, wins[i], &d1))
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61 continue;
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62 if(wa.map_state == IsViewable)
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63 /*manage*/;
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64 }
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65 }
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66 if(wins)
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67 XFree(wins);
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68 }
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69
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70 static int
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71 win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
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72 {
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73 Atom real;
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74 int format;
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75 unsigned long res, extra;
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76 int status;
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77
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78 status = XGetWindowProperty(dpy, w, a, 0L, l, False, t, &real, &format,
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79 &res, &extra, prop);
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80
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81 if(status != Success || *prop == 0) {
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82 return 0;
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83 }
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84 if(res == 0) {
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85 free((void *) *prop);
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86 }
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87 return res;
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88 }
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89
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90 int
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91 win_proto(Window w)
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92 {
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93 Atom *protocols;
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94 long res;
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95 int protos = 0;
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96 int i;
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97
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98 res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
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99 ((unsigned char **) &protocols));
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100 if(res <= 0) {
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101 return protos;
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102 }
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103 for(i = 0; i < res; i++) {
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104 if(protocols[i] == wm_atom[WMDelete])
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105 protos |= WM_PROTOCOL_DELWIN;
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106 }
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107 free((char *) protocols);
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108 return protos;
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109 }
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110
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111 /*
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112 * There's no way to check accesses to destroyed windows, thus
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113 * those cases are ignored (especially on UnmapNotify's).
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114 * Other types of errors call Xlib's default error handler, which
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115 * calls exit().
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116 */
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117 static int
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118 error_handler(Display *dpy, XErrorEvent *error)
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119 {
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120 if(error->error_code == BadWindow
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121 || (error->request_code == X_SetInputFocus
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122 && error->error_code == BadMatch)
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123 || (error->request_code == X_PolyText8
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124 && error->error_code == BadDrawable)
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125 || (error->request_code == X_PolyFillRectangle
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126 && error->error_code == BadDrawable)
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127 || (error->request_code == X_PolySegment
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128 && error->error_code == BadDrawable)
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129 || (error->request_code == X_ConfigureWindow
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130 && error->error_code == BadMatch)
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131 || (error->request_code == X_GrabKey
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132 && error->error_code == BadAccess))
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133 return 0;
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134 fprintf(stderr, "gridwm: fatal error: request code=%d, error code=%d\n",
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135 error->request_code, error->error_code);
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136 return x_error_handler(dpy, error); /* may call exit() */
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137 }
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138
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139 /*
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140 * Startup Error handler to check if another window manager
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141 * is already running.
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142 */
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143 static int
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144 startup_error_handler(Display *dpy, XErrorEvent *error)
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145 {
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146 other_wm_running = True;
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147 return -1;
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148 }
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149
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150 static void
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151 init_lock_keys()
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152 {
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153 XModifierKeymap *modmap;
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154 KeyCode numlock;
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155 int i;
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156 static int masks[] = {
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157 ShiftMask, LockMask, ControlMask, Mod1Mask,
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158 Mod2Mask, Mod3Mask, Mod4Mask, Mod5Mask
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159 };
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160
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161 numlock_mask = 0;
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162 modmap = XGetModifierMapping(dpy);
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163 numlock = XKeysymToKeycode(dpy, XStringToKeysym("Num_Lock"));
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164
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165 if(modmap && modmap->max_keypermod > 0) {
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166 int max = (sizeof(masks) / sizeof(int)) * modmap->max_keypermod;
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167 for(i = 0; i < max; i++)
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168 if(numlock && (modmap->modifiermap[i] == numlock))
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169 numlock_mask = masks[i / modmap->max_keypermod];
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170 }
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171 XFreeModifiermap(modmap);
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172
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173 kmask = 255 & ~(numlock_mask | LockMask);
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174 }
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175
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176 static void
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177 cleanup()
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178 {
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179 /*
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180 Client *c;
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181 for(c=client; c; c=c->next)
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182 reparent_client(c, root, c->sel->rect.x, c->sel->rect.y);
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183 XSetInputFocus(dpy, PointerRoot, RevertToPointerRoot, CurrentTime);
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184 */
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185 }
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186
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187 int
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188 main(int argc, char *argv[])
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189 {
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190 int i;
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191 XSetWindowAttributes wa;
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192 unsigned int mask;
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193 Window w;
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194
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195 /* command line args */
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196 for(i = 1; (i < argc) && (argv[i][0] == '-'); i++) {
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197 switch (argv[i][1]) {
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198 case 'v':
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199 fprintf(stdout, "%s", version);
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200 exit(0);
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201 break;
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202 default:
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203 usage();
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204 break;
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205 }
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206 }
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207
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208 dpy = XOpenDisplay(0);
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209 if(!dpy)
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210 error("gridwm: cannot connect X server\n");
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211
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212 screen = DefaultScreen(dpy);
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213 root = RootWindow(dpy, screen);
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214
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215 /* check if another WM is already running */
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216 other_wm_running = False;
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217 XSetErrorHandler(startup_error_handler);
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218 /* this causes an error if some other WM is running */
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219 XSelectInput(dpy, root, SubstructureRedirectMask);
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220 XSync(dpy, False);
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221
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222 if(other_wm_running)
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223 error("gridwm: another window manager is already running\n");
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224
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225 rect.x = rect.y = 0;
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226 rect.width = DisplayWidth(dpy, screen);
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227 rect.height = DisplayHeight(dpy, screen);
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228 sel_screen = XQueryPointer(dpy, root, &w, &w, &i, &i, &i, &i, &mask);
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229
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230 XSetErrorHandler(0);
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231 x_error_handler = XSetErrorHandler(error_handler);
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232
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233 /* init atoms */
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234 wm_atom[WMState] = XInternAtom(dpy, "WM_STATE", False);
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235 wm_atom[WMProtocols] = XInternAtom(dpy, "WM_PROTOCOLS", False);
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236 wm_atom[WMDelete] = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
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237 net_atom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
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238 net_atom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
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239
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240 XChangeProperty(dpy, root, net_atom[NetSupported], XA_ATOM, 32,
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241 PropModeReplace, (unsigned char *) net_atom, NetLast);
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242
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243
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244 /* init cursors */
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245 cursor[CurNormal] = XCreateFontCursor(dpy, XC_left_ptr);
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246 cursor[CurResize] = XCreateFontCursor(dpy, XC_sizing);
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247 cursor[CurMove] = XCreateFontCursor(dpy, XC_fleur);
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248
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249 init_lock_keys();
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250
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251 pmap = XCreatePixmap(dpy, root, rect.width, rect.height,
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252 DefaultDepth(dpy, screen));
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253
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254 wa.event_mask = SubstructureRedirectMask | EnterWindowMask | LeaveWindowMask;
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255 wa.cursor = cursor[CurNormal];
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256 XChangeWindowAttributes(dpy, root, CWEventMask | CWCursor, &wa);
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257
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258 scan_wins();
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259
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260 cleanup();
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261 XCloseDisplay(dpy);
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262
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263 return 0;
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264 }
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