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1 /* External client, raw Xlib version.
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2 Copyright (C) 1993, 1994 Sun Microsystems, Inc.
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3
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4 This library is free software; you can redistribute it and/or
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5 modify it under the terms of the GNU Library General Public
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6 License as published by the Free Software Foundation; either
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7 version 2 of the License, or (at your option) any later version.
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8
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9 This library is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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12 Library General Public License for more details.
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13
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14 You should have received a copy of the GNU Library General Public
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15 License along with this library; if not, write to
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16 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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17 Boston, MA 02111-1307, USA. */
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18
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19 /* Synched up with: Not in FSF. */
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20
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21 /* Written by Ben Wing, February 1994. */
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22
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23 #include <X11/Xlib.h>
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24 #include <X11/Xresource.h>
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25 #include <X11/Xutil.h>
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26 #include "extw-Xlib.h"
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27
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28 /* this is not a perfect solution, but otherwise we have to include all
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29 of the Xt junk */
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30
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31 #define XtGeometryNo 1
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32
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33 #if (XlibSpecificationRelease < 5)
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34 # define XPointer char *
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35 #endif
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36
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37 static int context_inited;
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38 static XContext focus_context;
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39
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40 /* does the specified window have the focus, given that the pointer just
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41 entered (or left) the window (according to enter_p)? This question
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42 does not have an obvious answer in X. (Basically, X sucks.) */
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43
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44 static int
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45 window_has_focus_p (Display *display, Window win, int enter_p)
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46 {
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47 Window focuswin;
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48 int dummy;
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49
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50 XGetInputFocus(display, &focuswin, &dummy);
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51 if (focuswin == PointerRoot)
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52 return enter_p;
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53 if (focuswin == win)
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54 return True;
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55 if (!enter_p)
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56 return False;
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57 do
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58 {
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59 Status st;
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60 Window root_win, parent_win;
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61 Window *child_win;
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62 int nchild;
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63
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64 st = XQueryTree(display, win, &root_win, &parent_win, &child_win,
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65 &nchild);
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66 if (!st)
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67 return False;
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68 XFree((XPointer)child_win);
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69 if (parent_win == focuswin)
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70 return True;
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71 if (parent_win == root_win)
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72 return False;
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73 win = parent_win;
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74 }
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75 while (1);
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76 }
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77
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78
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79 /* External entry points when using XLib directly */
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80
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81 void ExternalClientInitialize (Display *display, Window win);
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82 void
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83 ExternalClientInitialize (Display *display, Window win)
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84 {
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85 extw_initialize_atoms(display);
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86 extw_which_side = extw_client_send;
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87 if (!context_inited)
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88 {
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89 focus_context = XUniqueContext();
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90 context_inited = 1;
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91 }
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92 XSaveContext(display, win, focus_context, 0);
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93 XSelectInput(display, win, EnterWindowMask | LeaveWindowMask |
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94 FocusChangeMask);
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95 }
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96
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97 void ExternalClientEventHandler (Display *display, Window win, XEvent *event);
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98 void
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99 ExternalClientEventHandler (Display *display, Window win, XEvent *event)
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100 {
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101 if (win != event->xany.window)
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102 return;
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103
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104 if (event->type == ClientMessage &&
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105 event->xclient.message_type == a_EXTW_NOTIFY &&
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106 event->xclient.data.l[0] == extw_shell_send)
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107 switch (event->xclient.data.l[1]) {
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108 case extw_notify_gm:
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109 /* for the moment, just refuse geometry requests. */
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110 extw_send_notify_3(display, win, extw_notify_gm, XtGeometryNo, 0, 0);
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111 break;
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112
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113 case extw_notify_init:
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114 extw_send_notify_3(display, win, extw_notify_init, EXTW_TYPE_XLIB, 0, 0);
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115 break;
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116
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117 case extw_notify_end:
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118 XClearArea(display, win, 0, 0, 0, 0, True);
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119 break;
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120 }
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121 else
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122 {
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123 int focus_status;
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124 XPointer current_focus;
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125
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126 if (event->type == FocusIn)
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127 focus_status = 1;
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128 else if (event->type == FocusOut)
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129 focus_status = 0;
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130 else if (event->type == EnterNotify &&
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131 event->xcrossing.detail != NotifyInferior)
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132 focus_status = window_has_focus_p(display, win, 1);
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133 else if (event->type == LeaveNotify &&
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134 event->xcrossing.detail != NotifyInferior)
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135 focus_status = window_has_focus_p(display, win, 0);
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136 else
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137 return;
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138 XFindContext(display, win, focus_context, ¤t_focus);
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139 if (focus_status != (int) current_focus)
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140 {
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141 XSaveContext(display, win, focus_context, (XPointer) focus_status);
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142 extw_send_notify_3(display, win, focus_status ?
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143 extw_notify_focus_in : extw_notify_focus_out,
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144 0, 0, 0);
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145 }
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146 }
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147 }
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