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221
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1 /* mswindows selection processing for XEmacs
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2 Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not synched with FSF. */
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22
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23 /* Authorship:
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24
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25 Written by Kevin Gallo for FSF Emacs.
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272
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26 Rewritten for mswindows by Jonathan Harris, December 1997 for 21.0.
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221
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27 */
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28
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29
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30 #include <config.h>
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31 #include "lisp.h"
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398
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32 #include "frame.h"
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33 #include "select.h"
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221
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34
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35 #include "console-msw.h"
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36
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37
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398
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38 /* Do protocol to assert ourself as a selection owner. Under mswindows
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39 this is easy, we just set the clipboard. */
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40 static Lisp_Object
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404
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41 mswindows_own_selection (Lisp_Object selection_name,
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42 Lisp_Object selection_value)
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398
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43 {
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44 Lisp_Object converted_value = get_local_selection (selection_name, QSTRING);
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404
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45
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398
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46 if (!NILP (converted_value) &&
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47 CONSP (converted_value) &&
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48 EQ (XCAR (converted_value), QSTRING) &&
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49 /* pure mswindows behaviour only says we can own the selection
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50 if it is the clipboard */
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51 EQ (selection_name, QCLIPBOARD))
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404
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52 {
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53 int rawsize, size, i;
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54 unsigned char *src, *dst, *next;
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55 HGLOBAL h = NULL;
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56 struct frame *f = NULL;
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57 struct gcpro gcpro1, gcpro2;
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58 Lisp_Object string = XCDR (converted_value);
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59
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60 GCPRO2 (converted_value, string);
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61
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62 CHECK_STRING (string);
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63
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64 /* Calculate size with LFs converted to CRLFs because
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65 * CF_TEXT format uses CRLF delimited ASCIIZ */
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66 src = XSTRING_DATA (string);
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67 size = rawsize = XSTRING_LENGTH (string) + 1;
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68 for (i=0; i<rawsize; i++)
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69 if (src[i] == '\n')
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70 size++;
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71
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72 f = selected_frame ();
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73 if (!OpenClipboard (FRAME_MSWINDOWS_HANDLE (f)))
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74 {
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75 UNGCPRO;
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76 return Qnil;
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77 }
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78
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79 /* This call to EmptyClipboard may post an event back to us if
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80 we already own the clipboard (to tell us we lost it) and this
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81 event may execute random lisp code. Hence we must protect
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82 the string and get its address again after the call. */
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83 if (!EmptyClipboard () ||
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84 (h = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, size)) == NULL ||
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85 (dst = (unsigned char *) GlobalLock (h)) == NULL)
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86 {
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87 if (h != NULL) GlobalFree (h);
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88 CloseClipboard ();
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89 UNGCPRO;
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90 return Qnil;
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91 }
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92 src = XSTRING_DATA (string);
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93
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94 /* Convert LFs to CRLFs */
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95 do
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96 {
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97 /* copy next line or remaining bytes including '\0' */
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98 next = (char*) memccpy (dst, src, '\n', rawsize);
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99 if (next)
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100 {
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101 /* copied one line ending with '\n' */
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102 int copied = next - dst;
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103 rawsize -= copied;
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104 src += copied;
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105 /* insert '\r' before '\n' */
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106 next[-1] = '\r';
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107 next[0] = '\n';
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108 dst = next+1;
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109 }
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110 }
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111 while (next);
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112
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113 GlobalUnlock (h);
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114
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115 i = (SetClipboardData (CF_TEXT, h) != NULL);
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116
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117 CloseClipboard ();
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118
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119 UNGCPRO;
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120 /* #### we are supposed to return a time! */
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121 /* return i ? Qt : Qnil; */
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122 return Qnil;
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123 }
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398
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124
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125 return Qnil;
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126 }
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127
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128 static Lisp_Object
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404
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129 mswindows_get_foreign_selection (Lisp_Object selection_symbol,
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130 Lisp_Object target_type)
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398
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131 {
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132 if (EQ (selection_symbol, QCLIPBOARD))
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404
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133 {
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134 HANDLE h;
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135 unsigned char *src, *dst, *next;
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136 Lisp_Object ret = Qnil;
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137
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138 if (!OpenClipboard (NULL))
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139 return Qnil;
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140
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141 if ((h = GetClipboardData (CF_TEXT)) != NULL &&
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142 (src = (unsigned char *) GlobalLock (h)) != NULL)
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143 {
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144 int i;
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145 int size, rawsize;
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146 size = rawsize = strlen (src);
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147
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148 for (i=0; i<rawsize; i++)
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149 if (src[i] == '\r' && src[i+1] == '\n')
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150 size--;
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151
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152 /* Convert CRLFs to LFs */
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153 ret = make_uninit_string (size);
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154 dst = XSTRING_DATA (ret);
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155 do
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156 {
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157 /* copy next line or remaining bytes excluding '\0' */
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158 next = (unsigned char *) memccpy (dst, src, '\r', rawsize);
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159 if (next)
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160 {
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161 /* copied one line ending with '\r' */
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162 int copied = next - dst;
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163 rawsize -= copied;
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164 src += copied;
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165 if (*src == '\n')
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166 dst += copied - 1; /* overwrite '\r' */
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167 else
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168 dst += copied;
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169 }
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170 }
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171 while (next);
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172
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173 GlobalUnlock (h);
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174 }
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175
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176 CloseClipboard ();
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177
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178 return ret;
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179 }
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398
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180 else
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181 return Qnil;
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182 }
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183
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184 static void
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185 mswindows_disown_selection (Lisp_Object selection, Lisp_Object timeval)
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186 {
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187 if (EQ (selection, QCLIPBOARD))
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404
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188 {
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189 BOOL success = OpenClipboard (NULL);
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190 if (success)
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191 {
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192 success = EmptyClipboard ();
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193 /* Close it regardless of whether empty worked. */
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194 if (!CloseClipboard ())
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195 success = FALSE;
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196 }
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197
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198 /* #### return success ? Qt : Qnil; */
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199 }
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200 }
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201
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202 static Lisp_Object
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203 mswindows_selection_exists_p (Lisp_Object selection)
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204 {
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205 if (EQ (selection, QCLIPBOARD))
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206 return IsClipboardFormatAvailable (CF_TEXT) ? Qt : Qnil;
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207 else
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208 return Qnil;
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286
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209 }
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210
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221
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211
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212 /************************************************************************/
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213 /* initialization */
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214 /************************************************************************/
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215
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216 void
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398
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217 console_type_create_select_mswindows (void)
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218 {
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219 CONSOLE_HAS_METHOD (mswindows, own_selection);
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220 CONSOLE_HAS_METHOD (mswindows, disown_selection);
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404
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221 CONSOLE_HAS_METHOD (mswindows, selection_exists_p);
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398
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222 CONSOLE_HAS_METHOD (mswindows, get_foreign_selection);
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223 }
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224
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225 void
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221
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226 syms_of_select_mswindows (void)
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227 {
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228 }
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229
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230 void
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231 vars_of_select_mswindows (void)
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232 {
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233 }
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