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