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647
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1 /* Selection processing for XEmacs -- common btwn select-x.c and select-gtk.c
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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 #ifdef PROCESSING_X_CODE
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24 #define XE_ATOM_TYPE Atom
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25 #define XE_ATOM_TO_SYMBOL x_atom_to_symbol
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26 #define XE_SYMBOL_TO_ATOM symbol_to_x_atom
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27 #else
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28 #define XE_ATOM_TYPE GdkAtom
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29 #define XE_ATOM_TO_SYMBOL atom_to_symbol
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30 #define XE_SYMBOL_TO_ATOM symbol_to_gtk_atom
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31 #endif /* PROCESSING_X_CODE */
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32
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33 /* #### These are going to move into Lisp code(!) with the aid of
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34 some new functions I'm working on - ajh */
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35
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36 /* These functions convert from the selection data read from the server into
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37 something that we can use from elisp, and vice versa.
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38
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39 Type: Format: Size: Elisp Type:
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40 ----- ------- ----- -----------
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41 * 8 * String
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42 ATOM 32 1 Symbol
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43 ATOM 32 > 1 Vector of Symbols
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44 * 16 1 Integer
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45 * 16 > 1 Vector of Integers
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46 * 32 1 if <=16 bits: Integer
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47 if > 16 bits: Cons of top16, bot16
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48 * 32 > 1 Vector of the above
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49
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50 When converting a Lisp number to C, it is assumed to be of format 16 if
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51 it is an integer, and of format 32 if it is a cons of two integers.
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52
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53 When converting a vector of numbers from Elisp to C, it is assumed to be
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54 of format 16 if every element in the vector is an integer, and is assumed
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55 to be of format 32 if any element is a cons of two integers.
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56
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57 When converting an object to C, it may be of the form (SYMBOL . <data>)
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58 where SYMBOL is what we should claim that the type is. Format and
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59 representation are as above.
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60
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61 NOTE: Under Mule, when someone shoves us a string without a type, we
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62 set the type to 'COMPOUND_TEXT and automatically convert to Compound
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63 Text. If the string has a type, we assume that the user wants the
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64 data sent as-is so we just do "binary" conversion.
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65 */
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66
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67
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68 static Lisp_Object
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69 selection_data_to_lisp_data (struct device *d,
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70 UChar_Binary *data,
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665
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71 Bytecount size,
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647
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72 XE_ATOM_TYPE type,
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73 int format)
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74 {
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75 #ifdef PROCESSING_X_CODE
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76 if (type == DEVICE_XATOM_NULL (d))
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77 return QNULL;
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78
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79 /* Convert any 8-bit data to a string, for compactness. */
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80 else if (format == 8)
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81 return make_ext_string ((Extbyte *) data, size,
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82 type == DEVICE_XATOM_TEXT (d) ||
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83 type == DEVICE_XATOM_COMPOUND_TEXT (d)
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84 ? Qctext : Qbinary);
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85
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86 /* Convert a single atom to a Lisp Symbol.
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87 Convert a set of atoms to a vector of symbols. */
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88 else if (type == XA_ATOM)
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89 #else
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90 if (type == gdk_atom_intern ("NULL", 0))
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91 return QNULL;
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92
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93 /* Convert any 8-bit data to a string, for compactness. */
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94 else if (format == 8)
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95 return make_ext_string ((Extbyte *) data, size,
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96 ((type == gdk_atom_intern ("TEXT", FALSE)) ||
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97 (type == gdk_atom_intern ("COMPOUND_TEXT", FALSE)))
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98 ? Qctext : Qbinary);
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99
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100 /* Convert a single atom to a Lisp Symbol.
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101 Convert a set of atoms to a vector of symbols. */
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102 else if (type == gdk_atom_intern ("ATOM", FALSE))
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103 #endif /* PROCESSING_X_CODE */
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104 {
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105 if (size == sizeof (XE_ATOM_TYPE))
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106 return XE_ATOM_TO_SYMBOL (d, *((XE_ATOM_TYPE *) data));
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107 else
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108 {
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665
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109 Elemcount i;
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110 Elemcount len = size / sizeof (XE_ATOM_TYPE);
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647
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111 Lisp_Object v = Fmake_vector (make_int (len), Qzero);
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112 for (i = 0; i < len; i++)
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113 Faset (v, make_int (i), XE_ATOM_TO_SYMBOL (d, ((XE_ATOM_TYPE *) data) [i]));
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114 return v;
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115 }
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116 }
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117
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118 /* Convert a single 16 or small 32 bit number to a Lisp Int.
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119 If the number is > 16 bits, convert it to a cons of integers,
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120 16 bits in each half.
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121 */
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122 else if (format == 32 && size == sizeof (long))
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123 return word_to_lisp (((unsigned long *) data) [0]);
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124 else if (format == 16 && size == sizeof (short))
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125 return make_int ((int) (((unsigned short *) data) [0]));
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126
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127 /* Convert any other kind of data to a vector of numbers, represented
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128 as above (as an integer, or a cons of two 16 bit integers).
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129
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130 #### Perhaps we should return the actual type to lisp as well.
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131
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132 (x-get-selection-internal 'PRIMARY 'LINE_NUMBER)
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133 ==> [4 4]
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134
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135 and perhaps it should be
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136
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137 (x-get-selection-internal 'PRIMARY 'LINE_NUMBER)
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138 ==> (SPAN . [4 4])
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139
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140 Right now the fact that the return type was SPAN is discarded before
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141 lisp code gets to see it.
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142 */
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143 else if (format == 16)
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144 {
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665
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145 Elemcount i;
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647
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146 Lisp_Object v = make_vector (size / 4, Qzero);
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147 for (i = 0; i < size / 4; i++)
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148 {
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149 int j = (int) ((unsigned short *) data) [i];
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150 Faset (v, make_int (i), make_int (j));
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151 }
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152 return v;
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153 }
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154 else
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155 {
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665
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156 Elemcount i;
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647
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157 Lisp_Object v = make_vector (size / 4, Qzero);
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158 for (i = 0; i < size / 4; i++)
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159 {
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160 unsigned long j = ((unsigned long *) data) [i];
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161 Faset (v, make_int (i), word_to_lisp (j));
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162 }
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163 return v;
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164 }
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165 }
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166
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167
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168 static void
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169 lisp_data_to_selection_data (struct device *d,
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170 Lisp_Object obj,
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171 UChar_Binary **data_ret,
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172 XE_ATOM_TYPE *type_ret,
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665
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173 Bytecount *size_ret,
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647
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174 int *format_ret)
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175 {
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176 Lisp_Object type = Qnil;
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177
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178 if (CONSP (obj) && SYMBOLP (XCAR (obj)))
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179 {
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180 type = XCAR (obj);
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181 obj = XCDR (obj);
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182 if (CONSP (obj) && NILP (XCDR (obj)))
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183 obj = XCAR (obj);
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184 }
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185
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186 if (EQ (obj, QNULL) || (EQ (type, QNULL)))
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187 { /* This is not the same as declining */
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188 *format_ret = 32;
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189 *size_ret = 0;
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190 *data_ret = 0;
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191 type = QNULL;
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192 }
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193 else if (STRINGP (obj))
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194 {
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195 const Extbyte *extval;
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665
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196 Bytecount extvallen;
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647
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197
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198 TO_EXTERNAL_FORMAT (LISP_STRING, obj,
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199 ALLOCA, (extval, extvallen),
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200 (NILP (type) ? Qctext : Qbinary));
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201 *format_ret = 8;
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202 *size_ret = extvallen;
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203 *data_ret = (UChar_Binary *) xmalloc (*size_ret);
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204 memcpy (*data_ret, extval, *size_ret);
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205 #ifdef MULE
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206 if (NILP (type)) type = QCOMPOUND_TEXT;
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207 #else
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208 if (NILP (type)) type = QSTRING;
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209 #endif
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210 }
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211 else if (CHARP (obj))
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212 {
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867
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213 Ibyte buf[MAX_ICHAR_LEN];
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647
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214 Bytecount len;
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215 const Extbyte *extval;
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665
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216 Bytecount extvallen;
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647
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217
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218 *format_ret = 8;
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867
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219 len = set_itext_ichar (buf, XCHAR (obj));
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647
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220 TO_EXTERNAL_FORMAT (DATA, (buf, len),
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221 ALLOCA, (extval, extvallen),
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222 Qctext);
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223 *size_ret = extvallen;
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224 *data_ret = (UChar_Binary *) xmalloc (*size_ret);
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225 memcpy (*data_ret, extval, *size_ret);
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226 #ifdef MULE
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227 if (NILP (type)) type = QCOMPOUND_TEXT;
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228 #else
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229 if (NILP (type)) type = QSTRING;
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230 #endif
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231 }
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232 else if (SYMBOLP (obj))
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233 {
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234 *format_ret = 32;
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235 *size_ret = 1;
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236 *data_ret = (UChar_Binary *) xmalloc (sizeof (XE_ATOM_TYPE) + 1);
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237 (*data_ret) [sizeof (XE_ATOM_TYPE)] = 0;
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238 (*(XE_ATOM_TYPE **) data_ret) [0] = XE_SYMBOL_TO_ATOM (d, obj, 0);
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239 if (NILP (type)) type = QATOM;
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240 }
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241 else if (INTP (obj) &&
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242 XINT (obj) <= 0x7FFF &&
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243 XINT (obj) >= -0x8000)
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244 {
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245 *format_ret = 16;
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246 *size_ret = 1;
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247 *data_ret = (UChar_Binary *) xmalloc (sizeof (short) + 1);
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248 (*data_ret) [sizeof (short)] = 0;
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249 (*(short **) data_ret) [0] = (short) XINT (obj);
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250 if (NILP (type)) type = QINTEGER;
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251 }
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252 else if (INTP (obj) || CONSP (obj))
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253 {
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254 *format_ret = 32;
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255 *size_ret = 1;
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256 *data_ret = (UChar_Binary *) xmalloc (sizeof (long) + 1);
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257 (*data_ret) [sizeof (long)] = 0;
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258 (*(unsigned long **) data_ret) [0] = lisp_to_word (obj);
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259 if (NILP (type)) type = QINTEGER;
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260 }
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261 else if (VECTORP (obj))
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262 {
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263 /* Lisp Vectors may represent a set of ATOMs;
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264 a set of 16 or 32 bit INTEGERs;
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265 or a set of ATOM_PAIRs (represented as [[A1 A2] [A3 A4] ...]
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266 */
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665
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267 Elemcount i;
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647
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268
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269 if (SYMBOLP (XVECTOR_DATA (obj) [0]))
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270 /* This vector is an ATOM set */
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271 {
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272 if (NILP (type)) type = QATOM;
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273 *size_ret = XVECTOR_LENGTH (obj);
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274 *format_ret = 32;
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275 *data_ret = (UChar_Binary *) xmalloc ((*size_ret) * sizeof (XE_ATOM_TYPE));
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276 for (i = 0; i < *size_ret; i++)
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277 if (SYMBOLP (XVECTOR_DATA (obj) [i]))
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278 (*(XE_ATOM_TYPE **) data_ret) [i] =
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279 XE_SYMBOL_TO_ATOM (d, XVECTOR_DATA (obj) [i], 0);
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280 else
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281 syntax_error
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282 ("all elements of the vector must be of the same type", obj);
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283 }
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284 #if 0 /* #### MULTIPLE doesn't work yet */
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285 else if (VECTORP (XVECTOR_DATA (obj) [0]))
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286 /* This vector is an ATOM_PAIR set */
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287 {
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288 if (NILP (type)) type = QATOM_PAIR;
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289 *size_ret = XVECTOR_LENGTH (obj);
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290 *format_ret = 32;
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291 *data_ret = (UChar_Binary *)
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292 xmalloc ((*size_ret) * sizeof (XE_ATOM_TYPE) * 2);
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293 for (i = 0; i < *size_ret; i++)
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294 if (VECTORP (XVECTOR_DATA (obj) [i]))
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295 {
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296 Lisp_Object pair = XVECTOR_DATA (obj) [i];
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297 if (XVECTOR_LENGTH (pair) != 2)
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298 syntax_error
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299 ("elements of the vector must be vectors of exactly two elements", pair);
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300
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301 (*(XE_ATOM_TYPE **) data_ret) [i * 2] =
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302 XE_SYMBOL_TO_ATOM (d, XVECTOR_DATA (pair) [0], 0);
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303 (*(XE_ATOM_TYPE **) data_ret) [(i * 2) + 1] =
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304 XE_SYMBOL_TO_ATOM (d, XVECTOR_DATA (pair) [1], 0);
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305 }
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306 else
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307 syntax_error
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308 ("all elements of the vector must be of the same type", obj);
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309 }
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310 #endif
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311 else
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312 /* This vector is an INTEGER set, or something like it */
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313 {
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314 *size_ret = XVECTOR_LENGTH (obj);
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315 if (NILP (type)) type = QINTEGER;
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316 *format_ret = 16;
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317 for (i = 0; i < *size_ret; i++)
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318 if (CONSP (XVECTOR_DATA (obj) [i]))
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319 *format_ret = 32;
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320 else if (!INTP (XVECTOR_DATA (obj) [i]))
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321 syntax_error
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322 ("all elements of the vector must be integers or conses of integers", obj);
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323
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324 *data_ret = (UChar_Binary *) xmalloc (*size_ret * (*format_ret/8));
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325 for (i = 0; i < *size_ret; i++)
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326 if (*format_ret == 32)
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327 (*((unsigned long **) data_ret)) [i] =
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328 lisp_to_word (XVECTOR_DATA (obj) [i]);
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329 else
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330 (*((unsigned short **) data_ret)) [i] =
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331 (unsigned short) lisp_to_word (XVECTOR_DATA (obj) [i]);
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332 }
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333 }
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334 else
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335 invalid_argument ("unrecognized selection data", obj);
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336
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337 *type_ret = XE_SYMBOL_TO_ATOM (d, type, 0);
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338 }
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339
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