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209
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1 /* The event_stream interface win32.
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2 Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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3 Copyright (C) 1995 Sun Microsystems, Inc.
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4 Copyright (C) 1996 Ben Wing.
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5 Copyright (C) 1997 Jonathan Harris.
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6
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7 This file is part of XEmacs.
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8
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9 XEmacs is free software; you can redistribute it and/or modify it
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10 under the terms of the GNU General Public License as published by the
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11 Free Software Foundation; either version 2, or (at your option) any
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12 later version.
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13
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14 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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17 for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with XEmacs; see the file COPYING. If not, write to
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21 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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22 Boston, MA 02111-1307, USA. */
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23
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24 /* Synched up with: Not in FSF. */
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25
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26 /* Authorship:
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27
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28 Ultimately based on FSF.
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29 Rewritten by Ben Wing.
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30 Rewritten for win32 by Jonathan Harris, November 1997 for 20.4.
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31 */
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32
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33 #include <config.h>
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34 #include "lisp.h"
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35
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36 #include "device.h"
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37 #include "console-w32.h"
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38 #include "events.h"
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39 #include "frame.h"
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40 #include "process.h"
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41
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42 #include "sysproc.h"
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43 #include "syswait.h"
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44 #include "systime.h"
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45
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46 #include "event-w32.h"
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47
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48 static struct event_stream *w32_event_stream;
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49 static Lisp_Object w32_dispatch_event_queue, w32_dispatch_event_queue_tail;
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50 static w32_waitable_count=0;
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51 CRITICAL_SECTION w32_dispatch_crit;
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52
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53 static Lisp_Object w32_dequeue_dispatch_event (void);
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54
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55 /*
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56 * List of win32 waitable handles.
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57 * Apart from the dispatch queue semaphore, all of these handles may be waited
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58 * on multiple times in emacs_w32_next_event before being processed and so must
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59 * be manual-reset events.
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60 */
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61 static HANDLE w32_waitable[MAX_WAITABLE];
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62
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63 /* random emacs info associated with each of the wait handles */
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64 static w32_waitable_info_type w32_waitable_info[MAX_WAITABLE];
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65
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66 void
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67 w32_enqueue_dispatch_event (Lisp_Object event)
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68 {
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69 assert(w32_waitable_count);
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70 // EnterCriticalSection (&w32_dispatch_crit);
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71 enqueue_event (event, &w32_dispatch_event_queue, &w32_dispatch_event_queue_tail);
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72 ReleaseSemaphore(w32_waitable[0], 1, NULL);
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73 // LeaveCriticalSection (&w32_dispatch_crit);
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74 }
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75
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76 static Lisp_Object
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77 w32_dequeue_dispatch_event (void)
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78 {
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79 Lisp_Object event;
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80 assert(w32_waitable_count);
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81 // EnterCriticalSection (&w32_dispatch_crit);
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82 event = dequeue_event (&w32_dispatch_event_queue, &w32_dispatch_event_queue_tail);
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83 // LeaveCriticalSection (&w32_dispatch_crit);
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84 return event;
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85 }
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86
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87 /*
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88 * Find a free waitable slot
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89 */
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90 static int
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91 w32_find_free_waitable(void)
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92 {
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93 int i;
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94 for (i=0; i<w32_waitable_count; i++)
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95 if (w32_waitable_info[i].type == w32_waitable_type_none)
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96 return i;
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97 assert (w32_waitable_count < MAX_WAITABLE);
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98 return w32_waitable_count++;
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99 }
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100
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101 /*
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102 * Create a new waitable using the type and data passed in by the info structure
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103 * Returns a pointer to the info associated with the assigned waitable object
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104 */
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105 w32_waitable_info_type *
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106 w32_add_waitable(w32_waitable_info_type *info)
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107 {
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108 int waitable;
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109
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110 switch (info->type)
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111 {
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112 case w32_waitable_type_dispatch:
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113 /* Can only have one waitable for the dispatch queue, and it's the first one */
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114 assert (w32_waitable_count++ == 0);
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115 waitable=0;
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116 InitializeCriticalSection(&w32_dispatch_crit);
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117 assert (w32_waitable[0] = CreateSemaphore (NULL, 0, 0x7fffffff, NULL));
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118 return w32_waitable_info+0;
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119
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120 #if 0 /* Windows95 doesn't support WaitableTimers */
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121 case w32_waitable_type_timeout:
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122 {
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123 LARGE_INTEGER due;
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124 due.QuadPart = 10000 * (LONGLONG) info->data.timeout.milliseconds;
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125 waitable = w32_find_free_waitable();
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126 w32_waitable[waitable] = CreateWaitableTimer(NULL, TRUE, NULL);
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127 SetWaitableTimer(w32_waitable[waitable], &due, 0, NULL, NULL, FALSE);
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128 w32_waitable_info[waitable].data.timeout.id = waitable;
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129 }
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130 break;
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131 #endif
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132
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133 default:
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134 assert(0);
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135 }
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136 w32_waitable_info[waitable].type = info->type;
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137 return w32_waitable_info+waitable;
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138 }
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139
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140 /*
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141 * Remove a waitable using the type and data passed in by the info structure.
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142 */
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143 void
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144 w32_remove_waitable(w32_waitable_info_type *info)
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145 {
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146 int waitable;
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147
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148 switch (info->type)
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149 {
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150 #if 0
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151 case w32_waitable_type_timeout:
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152 waitable = info->data.timeout.id;
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153 CancelWaitableTimeout(w32_waitable[waitable]);
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154 break;
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155 #endif
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156
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157 default:
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158 assert(0);
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159 }
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160
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161 CloseHandle(w32_waitable[waitable]);
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162 w32_waitable[waitable] = 0;
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163 w32_waitable_info[waitable].type = w32_waitable_type_none;
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164 if (waitable == w32_waitable_count-1)
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165 --w32_waitable_count;
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166 }
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167
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168
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169 /************************************************************************/
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170 /* methods */
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171 /************************************************************************/
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172
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173 static int
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174 emacs_w32_add_timeout (EMACS_TIME thyme)
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175 {
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176 EMACS_TIME current_time;
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177 int milliseconds;
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178 int id;
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179 w32_request_type request;
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180
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181 EMACS_GET_TIME (current_time);
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182 EMACS_SUB_TIME (thyme, thyme, current_time);
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183 milliseconds = EMACS_SECS (thyme) * 1000 + EMACS_USECS (thyme) / 1000;
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184 if (milliseconds < 1)
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185 milliseconds = 1;
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186 request.thing1 = (void *) milliseconds;
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187 id = w32_make_request(WM_XEMACS_SETTIMER, 0, &request);
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188 assert(id); /* XXX */
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189 return id;
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190 }
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191
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192 static void
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193 emacs_w32_remove_timeout (int id)
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194 {
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195 w32_request_type request = { (void *) id };
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196 w32_make_request(WM_XEMACS_KILLTIMER, 0, &request);
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197 }
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198
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199 static int
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200 emacs_w32_event_pending_p (int user_p)
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201 {
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202 return 0;
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203 }
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204
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205 static struct console *
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206 find_console_from_fd (int fd)
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207 {
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208 return 0;
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209 }
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210
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211 /*
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212 * Return the next event
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213 * We return windows events off the dispatch event queue in preference to other events
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214 */
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215 static void
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216 emacs_w32_next_event (struct Lisp_Event *emacs_event)
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217 {
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218 DWORD active;
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219 active = WaitForMultipleObjects (w32_waitable_count, w32_waitable,
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220 FALSE, INFINITE);
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221 assert(active >= WAIT_OBJECT_0 && active <= WAIT_OBJECT_0 + w32_waitable_count - 1);
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222
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223 /* Windows events on the dispatch event queue */
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224 if (active == WAIT_OBJECT_0)
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225 {
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226 /* XXX Copied from event-Xt.c */
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227 Lisp_Object event, event2;
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228
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229 EnterCriticalSection (&w32_dispatch_crit);
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230 XSETEVENT (event2, emacs_event);
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231 event = w32_dequeue_dispatch_event ();
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232 Fcopy_event (event, event2);
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233 Fdeallocate_event (event);
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234 LeaveCriticalSection (&w32_dispatch_crit);
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235 }
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236 else
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237 {
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238 /* XXX FIXME: We should do some kind of round-robin scheme to ensure fairness */
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239 int waitable = active - WAIT_OBJECT_0;
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240 w32_waitable_info_type *info = w32_waitable_info + waitable;
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241
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242 switch (info->type)
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243 {
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244 case w32_waitable_type_timeout:
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245 emacs_event->channel = Qnil;
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246 emacs_event->event_type = timeout_event;
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247 emacs_event->event.timeout.interval_id = info->data.timeout.id;
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248 w32_remove_waitable(info);
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249 break;
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250
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251 default:
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252 assert(0);
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253 }
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254 }
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255 }
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256
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257 /*
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258 * Handle a magic event off the dispatch queue.
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259 * XXX split into seperate functions for clarity.
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260 */
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261 static void
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262 emacs_w32_handle_magic_event (struct Lisp_Event *emacs_event)
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263 {
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264 RECT *rect = &EVENT_W32_MAGIC_DATA(emacs_event);
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265 struct frame *f = XFRAME (EVENT_CHANNEL (emacs_event));
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266 Lisp_Object frame = Qnil;
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267 XSETFRAME (frame, f);
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268 #if 0
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269 stderr_out("magic %x, (%d,%d), (%d,%d)\n",
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270 EVENT_W32_MAGIC_TYPE(emacs_event),
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271 rect->left, rect->top, rect->right, rect->bottom);
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272 #endif
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273 switch (EVENT_W32_MAGIC_TYPE(emacs_event))
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274 {
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275 case WM_SETFOCUS:
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276 case WM_KILLFOCUS:
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277 {
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278 int in_p = (EVENT_W32_MAGIC_TYPE(emacs_event) == WM_SETFOCUS);
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279 Lisp_Object conser;
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280 /* struct gcpro gcpro1; */
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281
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282 /* Clear sticky modifiers here (if we had any) */
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283
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284 conser = Fcons (frame, Fcons (FRAME_DEVICE (f), in_p ? Qt : Qnil));
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285 /* GCPRO1 (conser); XXX Not necessary? */
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286 emacs_handle_focus_change_preliminary (conser);
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287 /* Under X the stuff up to here is done in the X event handler.
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288 I Don't know why */
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289 emacs_handle_focus_change_final (conser);
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290 /* UNGCPRO; */
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291 }
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292 break;
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293
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294 /* XXX What about Enter & Leave */
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295 #if 0
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296 va_run_hook_with_args (in_p ? Qmouse_enter_frame_hook :
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297 Qmouse_leave_frame_hook, 1, frame);
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298 break;
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299 #endif
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300
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301 case WM_SIZE:
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302 if ((rect->left & rect->top & rect->right & rect->bottom) == -1)
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303 {
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304 /* Iconified */
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305 FRAME_VISIBLE_P (f) = 0;
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306 va_run_hook_with_args (Qunmap_frame_hook, 1, frame);
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307 Fframe_iconified_p (frame);
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308 }
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309 else
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310 {
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311 /* If we're uniconified, our size may or may not have changed */
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312 int columns, rows;
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313 int was_visible = FRAME_VISIBLE_P (f);
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314 pixel_to_char_size (f, rect->right, rect->bottom, &columns, &rows);
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315
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316 FRAME_VISIBLE_P (f) = 1;
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317 if (f->height!=rows || f->width!=columns || f->size_change_pending)
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318 {
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319 /* Size changed */
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320 f->pixwidth = rect->right;
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321 f->pixheight = rect->bottom;
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322 change_frame_size (f, rows, columns, 0);
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323 /* MARK_FRAME_WINDOWS_STRUCTURE_CHANGED (f); /* XXX Too extreme? */
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324 }
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325
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326 if (!was_visible)
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327 va_run_hook_with_args (Qmap_frame_hook, 1, frame);
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328
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329 }
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330 break;
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331
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332 case WM_PAINT:
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333 w32_redraw_exposed_area(f, rect->left, rect->top,
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334 rect->right, rect->bottom);
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335 break;
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336
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337 default:
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338 assert(0);
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339 }
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340 }
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341
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342 static void
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343 emacs_w32_select_process (struct Lisp_Process *process)
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344 {
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345 }
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346
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347 static void
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348 emacs_w32_unselect_process (struct Lisp_Process *process)
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349 {
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350 }
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351
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352 static void
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353 emacs_w32_select_console (struct console *con)
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354 {
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355 }
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356
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357 static void
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358 emacs_w32_unselect_console (struct console *con)
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359 {
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360 }
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361
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362 static void
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363 emacs_w32_quit_p (void)
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364 {
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365 }
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366
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367 /* This is called from GC when a process object is about to be freed.
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368 If we've still got pointers to it in this file, we're gonna lose hard.
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369 */
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370 void
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371 debug_process_finalization (struct Lisp_Process *p)
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372 {
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373 #if 0 /* #### */
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374 int i;
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375 int infd, outfd;
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376 get_process_file_descriptors (p, &infd, &outfd);
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377 /* if it still has fds, then it hasn't been killed yet. */
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378 assert (infd < 0);
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379 assert (outfd < 0);
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380 /* Better not still be in the "with input" table; we know it's got no fds. */
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381 for (i = 0; i < MAXDESC; i++)
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382 {
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383 Lisp_Object process = filedesc_fds_with_input [i];
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384 assert (!PROCESSP (process) || XPROCESS (process) != p);
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385 }
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386 #endif
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387 }
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388
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389 /************************************************************************/
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|
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390 /* initialization */
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391 /************************************************************************/
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392
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393 void
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394 vars_of_event_w32 (void)
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395 {
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396 w32_dispatch_event_queue = Qnil;
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397 staticpro (&w32_dispatch_event_queue);
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398 w32_dispatch_event_queue_tail = Qnil;
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399
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400 w32_event_stream = xnew (struct event_stream);
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401
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402 w32_event_stream->event_pending_p = emacs_w32_event_pending_p;
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403 w32_event_stream->next_event_cb = emacs_w32_next_event;
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404 w32_event_stream->handle_magic_event_cb = emacs_w32_handle_magic_event;
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405 w32_event_stream->add_timeout_cb = emacs_w32_add_timeout;
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406 w32_event_stream->remove_timeout_cb = emacs_w32_remove_timeout;
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407 w32_event_stream->select_console_cb = emacs_w32_select_console;
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408 w32_event_stream->unselect_console_cb = emacs_w32_unselect_console;
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409 w32_event_stream->select_process_cb = emacs_w32_select_process;
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410 w32_event_stream->unselect_process_cb = emacs_w32_unselect_process;
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411 w32_event_stream->quit_p_cb = emacs_w32_quit_p;
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412 }
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413
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414 void
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415 syms_of_event_w32 (void)
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416 {
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417 }
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418
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419 void
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420 init_event_w32_late (void)
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421 {
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422 event_stream = w32_event_stream;
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423 }
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