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428
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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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26 Rewritten for mswindows by Jonathan Harris, December 1997 for 21.0.
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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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430
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32 #include "frame.h"
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428
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33 #include "select.h"
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34
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35 #include "console-msw.h"
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36
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37 DEFUN ("mswindows-set-clipboard", Fmswindows_set_clipboard, 1, 1, 0, /*
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38 Copy STRING to the mswindows clipboard.
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39 */
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40 (string))
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41 {
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42 int rawsize, size, i;
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43 unsigned char *src, *dst, *next;
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44 HGLOBAL h = NULL;
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430
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45 struct frame *f = NULL;
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428
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46
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47 CHECK_STRING (string);
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48
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49 /* Calculate size with LFs converted to CRLFs because
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50 * CF_TEXT format uses CRLF delimited ASCIIZ */
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51 src = XSTRING_DATA (string);
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52 size = rawsize = XSTRING_LENGTH (string) + 1;
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53 for (i=0; i<rawsize; i++)
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54 if (src[i] == '\n')
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55 size++;
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56
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430
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57 f = selected_frame ();
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58 if (!OpenClipboard (FRAME_MSWINDOWS_HANDLE (f)))
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428
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59 return Qnil;
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60
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61 if (!EmptyClipboard () ||
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62 (h = GlobalAlloc (GMEM_MOVEABLE | GMEM_DDESHARE, size)) == NULL ||
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63 (dst = (unsigned char *) GlobalLock (h)) == NULL)
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64 {
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65 if (h != NULL) GlobalFree (h);
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66 CloseClipboard ();
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67 return Qnil;
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68 }
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69
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70 /* Convert LFs to CRLFs */
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71 do
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72 {
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73 /* copy next line or remaining bytes including '\0' */
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74 next = memccpy (dst, src, '\n', rawsize);
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75 if (next)
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76 {
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77 /* copied one line ending with '\n' */
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78 int copied = next - dst;
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79 rawsize -= copied;
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80 src += copied;
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81 /* insert '\r' before '\n' */
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82 next[-1] = '\r';
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83 next[0] = '\n';
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84 dst = next+1;
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85 }
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86 }
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87 while (next);
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88
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89 GlobalUnlock (h);
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90
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91 i = (SetClipboardData (CF_TEXT, h) != NULL);
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92
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93 CloseClipboard ();
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94
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95 return i ? Qt : Qnil;
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96 }
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97
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98 /* Do protocol to assert ourself as a selection owner. Under mswindows
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99 this is easy, we just set the clipboard. */
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100 static Lisp_Object
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101 mswindows_own_selection (Lisp_Object selection_name, Lisp_Object selection_value)
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102 {
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103 Lisp_Object converted_value = get_local_selection (selection_name, QSTRING);
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104 if (!NILP (converted_value) &&
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105 CONSP (converted_value) &&
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106 EQ (XCAR (converted_value), QSTRING) &&
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107 /* pure mswindows behaviour only says we can own the selection
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108 if it is the clipboard */
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109 EQ (selection_name, QCLIPBOARD))
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110 Fmswindows_set_clipboard (XCDR (converted_value));
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111
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112 return Qnil;
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113 }
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114
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115 DEFUN ("mswindows-get-clipboard", Fmswindows_get_clipboard, 0, 0, 0, /*
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116 Return the contents of the mswindows clipboard.
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117 */
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118 ())
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119 {
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120 HANDLE h;
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121 unsigned char *src, *dst, *next;
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122 Lisp_Object ret = Qnil;
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123
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124 if (!OpenClipboard (NULL))
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125 return Qnil;
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126
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127 if ((h = GetClipboardData (CF_TEXT)) != NULL &&
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128 (src = (unsigned char *) GlobalLock (h)) != NULL)
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129 {
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130 int i;
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131 int size, rawsize;
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132 size = rawsize = strlen (src);
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133
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134 for (i=0; i<rawsize; i++)
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135 if (src[i] == '\r' && src[i+1] == '\n')
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136 size--;
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137
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138 /* Convert CRLFs to LFs */
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139 ret = make_uninit_string (size);
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140 dst = XSTRING_DATA (ret);
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141 do
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142 {
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143 /* copy next line or remaining bytes excluding '\0' */
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144 next = memccpy (dst, src, '\r', rawsize);
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145 if (next)
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146 {
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147 /* copied one line ending with '\r' */
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148 int copied = next - dst;
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149 rawsize -= copied;
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150 src += copied;
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151 if (*src == '\n')
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152 dst += copied - 1; /* overwrite '\r' */
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153 else
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154 dst += copied;
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155 }
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156 }
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157 while (next);
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158
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159 GlobalUnlock (h);
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160 }
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161
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162 CloseClipboard ();
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163
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164 return ret;
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165 }
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166
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167 static Lisp_Object
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168 mswindows_get_foreign_selection (Lisp_Object selection_symbol, Lisp_Object target_type)
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169 {
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170 if (EQ (selection_symbol, QCLIPBOARD))
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171 return Fmswindows_get_clipboard ();
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172 else
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173 return Qnil;
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174 }
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175
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176 DEFUN ("mswindows-selection-exists-p", Fmswindows_selection_exists_p, 0, 0, 0, /*
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177 Whether there is an MS-Windows selection.
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178 */
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179 ())
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180 {
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181 return IsClipboardFormatAvailable (CF_TEXT) ? Qt : Qnil;
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182 }
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183
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184 DEFUN ("mswindows-delete-selection", Fmswindows_delete_selection, 0, 0, 0, /*
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185 Remove the current MS-Windows selection from the clipboard.
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186 */
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187 ())
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188 {
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430
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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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428
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199 }
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200
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201 static void
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202 mswindows_disown_selection (Lisp_Object selection, Lisp_Object timeval)
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203 {
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204 if (EQ (selection, QCLIPBOARD))
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205 Fmswindows_delete_selection ();
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206 }
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207
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208
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209 /************************************************************************/
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210 /* initialization */
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211 /************************************************************************/
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212
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213 void
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214 console_type_create_select_mswindows (void)
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215 {
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216 CONSOLE_HAS_METHOD (mswindows, own_selection);
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217 CONSOLE_HAS_METHOD (mswindows, disown_selection);
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218 CONSOLE_HAS_METHOD (mswindows, get_foreign_selection);
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219 }
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220
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221 void
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222 syms_of_select_mswindows (void)
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223 {
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224 DEFSUBR (Fmswindows_set_clipboard);
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225 DEFSUBR (Fmswindows_get_clipboard);
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226 DEFSUBR (Fmswindows_selection_exists_p);
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227 DEFSUBR (Fmswindows_delete_selection);
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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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