1 /* |
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2 * Copyright 2003-2006 Sun Microsystems, Inc. All Rights Reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. Sun designates this |
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8 * particular file as subject to the "Classpath" exception as provided |
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9 * by Sun in the LICENSE file that accompanied this code. |
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10 * |
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11 * This code 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 * version 2 for more details (a copy is included in the LICENSE file that |
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15 * accompanied this code). |
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16 * |
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17 * You should have received a copy of the GNU General Public License version |
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18 * 2 along with this work; if not, write to the Free Software Foundation, |
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19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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20 * |
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21 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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22 * CA 95054 USA or visit www.sun.com if you need additional information or |
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23 * have any questions. |
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24 */ |
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25 |
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26 #ifdef HEADLESS |
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27 #error This file should not be included in headless library |
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28 #endif |
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29 |
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30 #include "awt_dnd.h" |
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31 |
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32 #include "awt_p.h" |
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33 |
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34 #include "java_awt_dnd_DnDConstants.h" |
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35 |
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36 /* Shared atoms */ |
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37 |
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38 Atom XA_WM_STATE; |
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39 Atom XA_DELETE; |
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40 |
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41 /* XDnD atoms */ |
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42 |
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43 Atom XA_XdndAware; |
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44 Atom XA_XdndProxy; |
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45 |
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46 Atom XA_XdndEnter; |
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47 Atom XA_XdndPosition; |
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48 Atom XA_XdndLeave; |
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49 Atom XA_XdndDrop; |
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50 Atom XA_XdndStatus; |
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51 Atom XA_XdndFinished; |
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52 |
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53 Atom XA_XdndTypeList; |
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54 Atom XA_XdndSelection; |
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55 |
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56 Atom XA_XdndActionCopy; |
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57 Atom XA_XdndActionMove; |
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58 Atom XA_XdndActionLink; |
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59 Atom XA_XdndActionAsk; |
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60 Atom XA_XdndActionPrivate; |
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61 Atom XA_XdndActionList; |
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62 |
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63 /* Motif DnD atoms */ |
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64 |
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65 Atom _XA_MOTIF_DRAG_WINDOW; |
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66 Atom _XA_MOTIF_DRAG_TARGETS; |
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67 Atom _XA_MOTIF_DRAG_INITIATOR_INFO; |
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68 Atom _XA_MOTIF_DRAG_RECEIVER_INFO; |
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69 Atom _XA_MOTIF_DRAG_AND_DROP_MESSAGE; |
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70 Atom _XA_MOTIF_ATOM_0; |
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71 Atom XA_XmTRANSFER_SUCCESS; |
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72 Atom XA_XmTRANSFER_FAILURE; |
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73 |
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74 unsigned char MOTIF_BYTE_ORDER = 0; |
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75 |
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76 static Window awt_root_window = None; |
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77 |
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78 static Boolean |
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79 init_atoms(Display* display) { |
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80 struct atominit { |
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81 Atom *atomptr; |
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82 const char *name; |
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83 }; |
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84 |
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85 /* Add new atoms to this list */ |
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86 static struct atominit atom_list[] = { |
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87 /* Shared atoms */ |
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88 { &XA_WM_STATE, "WM_STATE" }, |
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89 { &XA_DELETE, "DELETE" }, |
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90 |
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91 /* XDnD atoms */ |
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92 { &XA_XdndAware, "XdndAware" }, |
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93 { &XA_XdndProxy, "XdndProxy" }, |
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94 { &XA_XdndEnter, "XdndEnter" }, |
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95 { &XA_XdndPosition, "XdndPosition" }, |
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96 { &XA_XdndLeave, "XdndLeave" }, |
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97 { &XA_XdndDrop, "XdndDrop" }, |
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98 { &XA_XdndStatus, "XdndStatus" }, |
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99 { &XA_XdndFinished, "XdndFinished" }, |
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100 { &XA_XdndTypeList, "XdndTypeList" }, |
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101 { &XA_XdndSelection, "XdndSelection" }, |
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102 { &XA_XdndActionCopy, "XdndActionCopy" }, |
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103 { &XA_XdndActionMove, "XdndActionMove" }, |
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104 { &XA_XdndActionLink, "XdndActionLink" }, |
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105 { &XA_XdndActionAsk, "XdndActionAsk" }, |
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106 { &XA_XdndActionPrivate, "XdndActionPrivate" }, |
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107 { &XA_XdndActionList, "XdndActionList" }, |
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108 |
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109 /* Motif DnD atoms */ |
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110 { &_XA_MOTIF_DRAG_WINDOW, "_MOTIF_DRAG_WINDOW" }, |
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111 { &_XA_MOTIF_DRAG_TARGETS, "_MOTIF_DRAG_TARGETS" }, |
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112 { &_XA_MOTIF_DRAG_INITIATOR_INFO, "_MOTIF_DRAG_INITIATOR_INFO" }, |
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113 { &_XA_MOTIF_DRAG_RECEIVER_INFO, "_MOTIF_DRAG_RECEIVER_INFO" }, |
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114 { &_XA_MOTIF_DRAG_AND_DROP_MESSAGE, "_MOTIF_DRAG_AND_DROP_MESSAGE" }, |
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115 { &_XA_MOTIF_ATOM_0, "_MOTIF_ATOM_0" }, |
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116 { &XA_XmTRANSFER_SUCCESS, "XmTRANSFER_SUCCESS" }, |
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117 { &XA_XmTRANSFER_FAILURE, "XmTRANSFER_FAILURE" } |
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118 }; |
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119 |
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120 #define ATOM_LIST_LENGTH (sizeof(atom_list)/sizeof(atom_list[0])) |
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121 |
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122 const char *names[ATOM_LIST_LENGTH]; |
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123 Atom atoms[ATOM_LIST_LENGTH]; |
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124 Status status; |
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125 size_t i; |
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126 |
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127 /* Fill the array of atom names */ |
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128 for (i = 0; i < ATOM_LIST_LENGTH; ++i) { |
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129 names[i] = atom_list[i].name; |
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130 } |
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131 |
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132 DTRACE_PRINT2("%s:%d initializing atoms ... ", __FILE__, __LINE__); |
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133 |
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134 status = XInternAtoms(awt_display, (char**)names, ATOM_LIST_LENGTH, |
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135 False, atoms); |
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136 if (status == 0) { |
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137 DTRACE_PRINTLN("failed"); |
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138 return False; |
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139 } |
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140 |
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141 /* Store returned atoms into corresponding global variables */ |
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142 DTRACE_PRINTLN("ok"); |
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143 for (i = 0; i < ATOM_LIST_LENGTH; ++i) { |
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144 *atom_list[i].atomptr = atoms[i]; |
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145 } |
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146 |
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147 return True; |
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148 #undef ATOM_LIST_LENGTH |
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149 } |
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150 |
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151 /* |
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152 * NOTE: must be called after awt_root_shell is created and realized. |
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153 */ |
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154 Boolean |
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155 awt_dnd_init(Display* display) { |
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156 static Boolean inited = False; |
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157 |
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158 if (!inited) { |
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159 Boolean atoms_inited = False; |
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160 Boolean ds_inited = False; |
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161 unsigned int value = 1; |
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162 MOTIF_BYTE_ORDER = (*((char*)&value) != 0) ? 'l' : 'B'; |
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163 |
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164 /* NOTE: init_atoms() should be called before the rest of initialization |
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165 so that atoms can be used. */ |
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166 inited = init_atoms(display); |
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167 |
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168 if (inited) { |
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169 if (XtIsRealized(awt_root_shell)) { |
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170 awt_root_window = XtWindow(awt_root_shell); |
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171 } else { |
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172 inited = False; |
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173 } |
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174 } |
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175 |
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176 inited = inited && awt_dnd_ds_init(display); |
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177 } |
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178 |
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179 return inited; |
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180 } |
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181 |
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182 /* |
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183 * Returns a window of awt_root_shell. |
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184 */ |
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185 Window |
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186 get_awt_root_window() { |
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187 return awt_root_window; |
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188 } |
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189 |
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190 static unsigned char local_xerror_code = Success; |
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191 |
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192 static int |
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193 xerror_handler(Display *dpy, XErrorEvent *err) { |
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194 local_xerror_code = err->error_code; |
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195 return 0; |
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196 } |
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197 |
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198 /**************** checked_X* wrappers *****************************************/ |
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199 #undef NO_SYNC |
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200 #undef SYNC_TRACE |
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201 |
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202 unsigned char |
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203 checked_XChangeProperty(Display* display, Window w, Atom property, Atom type, |
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204 int format, int mode, unsigned char* data, |
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205 int nelements) { |
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206 XErrorHandler xerror_saved_handler; |
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207 |
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208 #ifndef NO_SYNC |
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209 XSync(display, False); |
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210 #ifdef SYNC_TRACE |
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211 fprintf(stderr,"XSync 1\n"); |
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212 #endif |
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213 #endif |
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214 local_xerror_code = Success; |
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215 xerror_saved_handler = XSetErrorHandler(xerror_handler); |
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216 |
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217 XChangeProperty(display, w, property, type, format, mode, data, nelements); |
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218 |
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219 #ifndef NO_SYNC |
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220 XSync(display, False); |
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221 #ifdef SYNC_TRACE |
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222 fprintf(stderr,"XSync 2\n"); |
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223 #endif |
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224 #endif |
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225 XSetErrorHandler(xerror_saved_handler); |
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226 |
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227 return local_xerror_code; |
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228 } |
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229 |
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230 unsigned char |
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231 checked_XGetWindowProperty(Display* display, Window w, Atom property, long long_offset, |
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232 long long_length, Bool delete, Atom req_type, |
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233 Atom* actual_type_return, int* actual_format_return, |
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234 unsigned long* nitems_return, unsigned long* bytes_after_return, |
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235 unsigned char** prop_return) { |
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236 |
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237 XErrorHandler xerror_saved_handler; |
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238 int ret_val = Success; |
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239 |
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240 #ifndef NO_SYNC |
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241 XSync(display, False); |
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242 #ifdef SYNC_TRACE |
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243 fprintf(stderr,"XSync 3\n"); |
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244 #endif |
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245 #endif |
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246 local_xerror_code = Success; |
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247 xerror_saved_handler = XSetErrorHandler(xerror_handler); |
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248 |
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249 ret_val = XGetWindowProperty(display, w, property, long_offset, long_length, |
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250 delete, req_type, actual_type_return, |
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251 actual_format_return, nitems_return, |
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252 bytes_after_return, prop_return); |
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253 |
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254 #ifndef NO_SYNC |
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255 XSync(display, False); |
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256 #ifdef SYNC_TRACE |
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257 fprintf(stderr,"XSync 4\n"); |
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258 #endif |
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259 #endif |
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260 XSetErrorHandler(xerror_saved_handler); |
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261 |
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262 return ret_val != Success ? local_xerror_code : Success; |
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263 } |
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264 |
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265 unsigned char |
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266 checked_XSendEvent(Display* display, Window w, Bool propagate, long event_mask, |
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267 XEvent* event_send) { |
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268 |
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269 XErrorHandler xerror_saved_handler; |
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270 Status ret_val = 0; |
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271 |
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272 #ifndef NO_SYNC |
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273 XSync(display, False); |
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274 #ifdef SYNC_TRACE |
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275 fprintf(stderr,"XSync 5\n"); |
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276 #endif |
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277 #endif |
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278 local_xerror_code = Success; |
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279 xerror_saved_handler = XSetErrorHandler(xerror_handler); |
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280 |
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281 ret_val = XSendEvent(display, w, propagate, event_mask, event_send); |
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282 |
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283 #ifndef NO_SYNC |
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284 XSync(display, False); |
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285 #ifdef SYNC_TRACE |
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286 fprintf(stderr,"XSync 6\n"); |
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287 #endif |
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288 #endif |
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289 XSetErrorHandler(xerror_saved_handler); |
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290 |
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291 return ret_val == 0 ? local_xerror_code : Success; |
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292 } |
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293 |
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294 /* |
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295 * NOTE: returns Success even if the two windows aren't on the same screen. |
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296 */ |
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297 unsigned char |
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298 checked_XTranslateCoordinates(Display* display, Window src_w, Window dest_w, |
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299 int src_x, int src_y, int* dest_x_return, |
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300 int* dest_y_return, Window* child_return) { |
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301 |
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302 XErrorHandler xerror_saved_handler; |
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303 Bool ret_val = True; |
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304 |
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305 #ifndef NO_SYNC |
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306 XSync(display, False); |
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307 #ifdef SYNC_TRACE |
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308 fprintf(stderr,"XSync 7\n"); |
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309 #endif |
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310 #endif |
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311 local_xerror_code = Success; |
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312 xerror_saved_handler = XSetErrorHandler(xerror_handler); |
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313 |
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314 ret_val = XTranslateCoordinates(display, src_w, dest_w, src_x, src_y, |
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315 dest_x_return, dest_y_return, child_return); |
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316 |
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317 #ifndef NO_SYNC |
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318 XSync(display, False); |
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319 #ifdef SYNC_TRACE |
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320 fprintf(stderr,"XSync 8\n"); |
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321 #endif |
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322 #endif |
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323 XSetErrorHandler(xerror_saved_handler); |
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324 |
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325 return local_xerror_code; |
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326 } |
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327 |
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328 unsigned char |
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329 checked_XSelectInput(Display* display, Window w, long event_mask) { |
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330 XErrorHandler xerror_saved_handler; |
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331 Bool ret_val = True; |
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332 |
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333 #ifndef NO_SYNC |
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334 XSync(display, False); |
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335 #ifdef SYNC_TRACE |
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336 fprintf(stderr,"XSync 7\n"); |
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337 #endif |
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338 #endif |
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339 local_xerror_code = Success; |
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340 xerror_saved_handler = XSetErrorHandler(xerror_handler); |
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341 |
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342 XSelectInput(display, w, event_mask); |
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343 |
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344 #ifndef NO_SYNC |
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345 XSync(display, False); |
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346 #ifdef SYNC_TRACE |
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347 fprintf(stderr,"XSync 8\n"); |
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348 #endif |
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349 #endif |
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350 XSetErrorHandler(xerror_saved_handler); |
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351 |
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352 return local_xerror_code; |
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353 } |
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354 /******************************************************************************/ |
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355 |
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356 jint |
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357 xdnd_to_java_action(Atom action) { |
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358 if (action == XA_XdndActionCopy) { |
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359 return java_awt_dnd_DnDConstants_ACTION_COPY; |
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360 } else if (action == XA_XdndActionMove) { |
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361 return java_awt_dnd_DnDConstants_ACTION_MOVE; |
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362 } else if (action == XA_XdndActionLink) { |
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363 return java_awt_dnd_DnDConstants_ACTION_LINK; |
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364 } else if (action == None) { |
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365 return java_awt_dnd_DnDConstants_ACTION_NONE; |
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366 } else { |
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367 /* XdndActionCopy is the default. */ |
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368 return java_awt_dnd_DnDConstants_ACTION_COPY; |
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369 } |
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370 } |
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371 |
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372 Atom |
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373 java_to_xdnd_action(jint action) { |
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374 switch (action) { |
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375 case java_awt_dnd_DnDConstants_ACTION_COPY: return XA_XdndActionCopy; |
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376 case java_awt_dnd_DnDConstants_ACTION_MOVE: return XA_XdndActionMove; |
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377 case java_awt_dnd_DnDConstants_ACTION_LINK: return XA_XdndActionLink; |
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378 default: return None; |
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379 } |
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380 } |
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381 |
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382 void |
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383 write_card8(void** p, CARD8 value) { |
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384 CARD8** card8_pp = (CARD8**)p; |
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385 **card8_pp = value; |
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386 (*card8_pp)++; |
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387 } |
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388 |
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389 void |
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390 write_card16(void** p, CARD16 value) { |
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391 CARD16** card16_pp = (CARD16**)p; |
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392 **card16_pp = value; |
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393 (*card16_pp)++; |
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394 } |
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395 |
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396 void |
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397 write_card32(void** p, CARD32 value) { |
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398 CARD32** card32_pp = (CARD32**)p; |
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399 **card32_pp = value; |
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400 (*card32_pp)++; |
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401 } |
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402 |
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403 CARD8 |
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404 read_card8(char* data, size_t offset) { |
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405 return *((CARD8*)(data + offset)); |
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406 } |
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407 |
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408 CARD16 |
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409 read_card16(char* data, size_t offset, char byte_order) { |
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410 CARD16 card16 = *((CARD16*)(data + offset)); |
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411 |
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412 if (byte_order != MOTIF_BYTE_ORDER) { |
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413 SWAP2BYTES(card16); |
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414 } |
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415 |
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416 return card16; |
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417 } |
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418 |
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419 CARD32 |
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420 read_card32(char* data, size_t offset, char byte_order) { |
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421 CARD32 card32 = *((CARD32*)(data + offset)); |
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422 |
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423 if (byte_order != MOTIF_BYTE_ORDER) { |
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424 SWAP4BYTES(card32); |
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425 } |
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426 |
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427 return card32; |
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428 } |
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429 |
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430 static Window |
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431 read_motif_window(Display* dpy) { |
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432 Window root_window = DefaultRootWindow(dpy); |
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433 Window motif_window = None; |
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434 |
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435 unsigned char ret; |
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436 Atom type; |
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437 int format; |
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438 unsigned long nitems; |
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439 unsigned long after; |
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440 unsigned char *data; |
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441 |
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442 ret = checked_XGetWindowProperty(dpy, root_window, _XA_MOTIF_DRAG_WINDOW, |
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443 0, 0xFFFF, False, AnyPropertyType, &type, |
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444 &format, &nitems, &after, &data); |
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445 |
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446 if (ret != Success) { |
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447 DTRACE_PRINTLN2("%s:%d Failed to read _MOTIF_DRAG_WINDOW.", |
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448 __FILE__, __LINE__); |
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449 return None; |
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450 } |
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451 |
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452 |
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453 if (type == XA_WINDOW && format == 32 && nitems == 1) { |
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454 motif_window = *((Window*)data); |
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455 } |
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456 |
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457 XFree ((char *)data); |
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458 |
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459 return motif_window; |
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460 } |
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461 |
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462 static Window |
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463 create_motif_window(Display* dpy) { |
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464 Window root_window = DefaultRootWindow(dpy); |
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465 Window motif_window = None; |
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466 Display* display = NULL; |
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467 XSetWindowAttributes swa; |
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468 |
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469 display = XOpenDisplay(XDisplayString(dpy)); |
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470 if (display == NULL) { |
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471 return None; |
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472 } |
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473 |
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474 XGrabServer(display); |
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475 |
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476 XSetCloseDownMode(display, RetainPermanent); |
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477 |
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478 swa.override_redirect = True; |
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479 swa.event_mask = PropertyChangeMask; |
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480 motif_window = XCreateWindow(display, root_window, |
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481 -10, -10, 1, 1, 0, 0, |
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482 InputOnly, CopyFromParent, |
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483 (CWOverrideRedirect|CWEventMask), |
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484 &swa); |
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485 XMapWindow(display, motif_window); |
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486 |
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487 XChangeProperty(display, root_window, _XA_MOTIF_DRAG_WINDOW, XA_WINDOW, 32, |
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488 PropModeReplace, (unsigned char *)&motif_window, 1); |
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489 |
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490 XUngrabServer(display); |
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491 |
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492 XCloseDisplay(display); |
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493 |
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494 return motif_window; |
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495 } |
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496 |
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497 Window |
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498 get_motif_window(Display* dpy) { |
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499 /* |
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500 * Note: it is unsafe to cache the motif drag window handle, as another |
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501 * client can change the _MOTIF_DRAG_WINDOW property on the root, the handle |
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502 * becomes out-of-sync and all subsequent drag operations will fail. |
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503 */ |
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504 Window motif_window = read_motif_window(dpy); |
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505 if (motif_window == None) { |
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506 motif_window = create_motif_window(dpy); |
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507 } |
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508 |
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509 return motif_window; |
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510 } |
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511 |
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512 typedef struct { |
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513 CARD16 num_targets; |
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514 Atom* targets; |
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515 } TargetsTableEntry; |
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516 |
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517 typedef struct { |
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518 CARD16 num_entries; |
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519 TargetsTableEntry* entries; |
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520 } TargetsTable; |
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521 |
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522 typedef struct { |
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523 CARD8 byte_order; |
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524 CARD8 protocol_version; |
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525 CARD16 num_entries B16; |
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526 CARD32 heap_offset B32; |
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527 } TargetsPropertyRec; |
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528 |
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529 static TargetsTable* |
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530 get_target_list_table(Display* dpy) { |
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531 Window motif_window = get_motif_window(dpy); |
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532 TargetsTable* targets_table = NULL; |
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533 TargetsPropertyRec* targets_property_rec_ptr; |
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534 char* bufptr; |
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535 |
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536 unsigned char ret; |
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537 Atom type; |
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538 int format; |
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539 unsigned long nitems; |
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540 unsigned long after; |
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541 unsigned char *data; |
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542 unsigned int i, j; |
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543 |
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544 ret = checked_XGetWindowProperty(dpy, motif_window, _XA_MOTIF_DRAG_TARGETS, |
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545 0L, 100000L, False, _XA_MOTIF_DRAG_TARGETS, |
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546 &type, &format, &nitems, &after, |
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547 (unsigned char**)&targets_property_rec_ptr); |
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548 |
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549 if (ret != Success || type != _XA_MOTIF_DRAG_TARGETS || |
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550 targets_property_rec_ptr == NULL) { |
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551 |
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552 DTRACE_PRINT2("%s:%d Cannot read _XA_MOTIF_DRAG_TARGETS", __FILE__, __LINE__); |
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553 return NULL; |
|
554 } |
|
555 |
|
556 if (targets_property_rec_ptr->protocol_version != |
|
557 MOTIF_DND_PROTOCOL_VERSION) { |
|
558 DTRACE_PRINT2("%s:%d incorrect protocol version", __FILE__, __LINE__); |
|
559 return NULL; |
|
560 } |
|
561 |
|
562 if (targets_property_rec_ptr->byte_order != MOTIF_BYTE_ORDER) { |
|
563 SWAP2BYTES(targets_property_rec_ptr->num_entries); |
|
564 SWAP4BYTES(targets_property_rec_ptr->heap_offset); |
|
565 } |
|
566 |
|
567 targets_table = (TargetsTable*)malloc(sizeof(TargetsTable)); |
|
568 if (targets_table == NULL) { |
|
569 DTRACE_PRINT2("%s:%d malloc failed", __FILE__, __LINE__); |
|
570 return NULL; |
|
571 } |
|
572 targets_table->num_entries = targets_property_rec_ptr->num_entries; |
|
573 targets_table->entries = |
|
574 (TargetsTableEntry*)malloc(sizeof(TargetsTableEntry) * |
|
575 targets_property_rec_ptr->num_entries); |
|
576 if (targets_table->entries == NULL) { |
|
577 DTRACE_PRINT2("%s:%d malloc failed", __FILE__, __LINE__); |
|
578 free(targets_table); |
|
579 return NULL; |
|
580 } |
|
581 |
|
582 bufptr = (char *)targets_property_rec_ptr + sizeof(TargetsPropertyRec); |
|
583 for (i = 0; i < targets_table->num_entries; i++) { |
|
584 CARD16 num_targets; |
|
585 Atom* targets; |
|
586 memcpy(&num_targets, bufptr, 2 ); |
|
587 bufptr += 2; |
|
588 if (targets_property_rec_ptr->byte_order != MOTIF_BYTE_ORDER) { |
|
589 SWAP2BYTES(num_targets); |
|
590 } |
|
591 |
|
592 targets = (Atom*)malloc(sizeof(Atom) * num_targets); |
|
593 if (targets == NULL) { |
|
594 DTRACE_PRINT2("%s:%d malloc failed", __FILE__, __LINE__); |
|
595 free(targets_table->entries); |
|
596 free(targets_table); |
|
597 return NULL; |
|
598 } |
|
599 for (j = 0; j < num_targets; j++) { |
|
600 CARD32 target; |
|
601 memcpy(&target, bufptr, 4 ); |
|
602 bufptr += 4; |
|
603 if (targets_property_rec_ptr->byte_order != MOTIF_BYTE_ORDER) { |
|
604 SWAP4BYTES(target); |
|
605 } |
|
606 targets[j] = (Atom)target; |
|
607 } |
|
608 |
|
609 targets_table->entries[i].num_targets = num_targets; |
|
610 targets_table->entries[i].targets = targets; |
|
611 } |
|
612 |
|
613 free(targets_property_rec_ptr); |
|
614 |
|
615 return targets_table; |
|
616 } |
|
617 |
|
618 static void |
|
619 put_target_list_table(Display* dpy, TargetsTable* table) { |
|
620 Window motif_window = get_motif_window(dpy); |
|
621 TargetsPropertyRec* targets_property_rec_ptr; |
|
622 size_t table_size = sizeof(TargetsPropertyRec); |
|
623 unsigned char ret; |
|
624 int i, j; |
|
625 char* buf; |
|
626 |
|
627 for (i = 0; i < table->num_entries; i++) { |
|
628 table_size += table->entries[i].num_targets * sizeof(Atom) + 2; |
|
629 } |
|
630 |
|
631 targets_property_rec_ptr = (TargetsPropertyRec*)malloc(table_size); |
|
632 if (targets_property_rec_ptr == NULL) { |
|
633 DTRACE_PRINT2("%s:%d malloc failed", __FILE__, __LINE__); |
|
634 return; |
|
635 } |
|
636 targets_property_rec_ptr->byte_order = MOTIF_BYTE_ORDER; |
|
637 targets_property_rec_ptr->protocol_version = MOTIF_DND_PROTOCOL_VERSION; |
|
638 targets_property_rec_ptr->num_entries = table->num_entries; |
|
639 targets_property_rec_ptr->heap_offset = table_size; |
|
640 |
|
641 buf = (char*)targets_property_rec_ptr + sizeof(TargetsPropertyRec); |
|
642 |
|
643 for (i = 0; i < table->num_entries; i++) { |
|
644 CARD16 num_targets = table->entries[i].num_targets; |
|
645 memcpy(buf, &num_targets, 2); |
|
646 buf += 2; |
|
647 |
|
648 for (j = 0; j < num_targets; j++) { |
|
649 CARD32 target = table->entries[i].targets[j]; |
|
650 memcpy(buf, &target, 4); |
|
651 buf += 4; |
|
652 } |
|
653 } |
|
654 |
|
655 ret = checked_XChangeProperty(dpy, motif_window, _XA_MOTIF_DRAG_TARGETS, |
|
656 _XA_MOTIF_DRAG_TARGETS, 8, PropModeReplace, |
|
657 (unsigned char*)targets_property_rec_ptr, |
|
658 (int)table_size); |
|
659 |
|
660 if (ret != Success) { |
|
661 DTRACE_PRINT2("%s:%d XChangeProperty failed", __FILE__, __LINE__); |
|
662 } |
|
663 |
|
664 XtFree((char*)targets_property_rec_ptr); |
|
665 } |
|
666 |
|
667 static int |
|
668 _compare(const void* p1, const void* p2) { |
|
669 long diff = *(Atom*)p1 - *(Atom*)p2; |
|
670 |
|
671 if (diff > 0) { |
|
672 return 1; |
|
673 } else if (diff < 0) { |
|
674 return -1; |
|
675 } else { |
|
676 return 0; |
|
677 } |
|
678 } |
|
679 |
|
680 /* |
|
681 * Returns the index for the specified target list or -1 on failure. |
|
682 */ |
|
683 int |
|
684 get_index_for_target_list(Display* dpy, Atom* targets, unsigned int num_targets) { |
|
685 TargetsTable* targets_table = NULL; |
|
686 Atom* sorted_targets = NULL; |
|
687 int i, j; |
|
688 int ret = -1; |
|
689 |
|
690 if (targets == NULL && num_targets > 0) { |
|
691 DTRACE_PRINT4("%s:%d targets=%X num_targets=%d", |
|
692 __FILE__, __LINE__, targets, num_targets); |
|
693 return -1; |
|
694 } |
|
695 |
|
696 if (num_targets > 0) { |
|
697 sorted_targets = (Atom*)malloc(sizeof(Atom) * num_targets); |
|
698 if (sorted_targets == NULL) { |
|
699 DTRACE_PRINT2("%s:%d malloc failed.", __FILE__, __LINE__); |
|
700 return -1; |
|
701 } |
|
702 |
|
703 memcpy(sorted_targets, targets, sizeof(Atom) * num_targets); |
|
704 qsort ((void *)sorted_targets, (size_t)num_targets, (size_t)sizeof(Atom), |
|
705 _compare); |
|
706 } |
|
707 |
|
708 XGrabServer(dpy); |
|
709 targets_table = get_target_list_table(dpy); |
|
710 |
|
711 if (targets_table != NULL) { |
|
712 for (i = 0; i < targets_table->num_entries; i++) { |
|
713 TargetsTableEntry* entry_ptr = &targets_table->entries[i]; |
|
714 Boolean equals = True; |
|
715 if (num_targets == entry_ptr->num_targets) { |
|
716 for (j = 0; j < entry_ptr->num_targets; j++) { |
|
717 if (sorted_targets[j] != entry_ptr->targets[j]) { |
|
718 equals = False; |
|
719 break; |
|
720 } |
|
721 } |
|
722 } else { |
|
723 equals = False; |
|
724 } |
|
725 |
|
726 if (equals) { |
|
727 XUngrabServer(dpy); |
|
728 /* Workaround for bug 5039226 */ |
|
729 XSync(dpy, False); |
|
730 free((char*)sorted_targets); |
|
731 return i; |
|
732 } |
|
733 } |
|
734 } else { |
|
735 targets_table = (TargetsTable*)malloc(sizeof(TargetsTable)); |
|
736 targets_table->num_entries = 0; |
|
737 targets_table->entries = NULL; |
|
738 } |
|
739 |
|
740 /* Index not found - expand the table. */ |
|
741 targets_table->entries = |
|
742 (TargetsTableEntry*)realloc((char*)targets_table->entries, |
|
743 sizeof(TargetsTableEntry) * |
|
744 (targets_table->num_entries + 1)); |
|
745 if (targets_table->entries == NULL) { |
|
746 DTRACE_PRINT2("%s:%d realloc failed.", __FILE__, __LINE__); |
|
747 XUngrabServer(dpy); |
|
748 /* Workaround for bug 5039226 */ |
|
749 XSync(dpy, False); |
|
750 free((char*)sorted_targets); |
|
751 return -1; |
|
752 } |
|
753 |
|
754 /* Fill in the new entry */ |
|
755 { |
|
756 TargetsTableEntry* new_entry = |
|
757 &targets_table->entries[targets_table->num_entries]; |
|
758 |
|
759 new_entry->num_targets = num_targets; |
|
760 if (num_targets > 0) { |
|
761 new_entry->targets = (Atom*)malloc(sizeof(Atom) * num_targets); |
|
762 if (new_entry->targets == NULL) { |
|
763 DTRACE_PRINT2("%s:%d malloc failed.", __FILE__, __LINE__); |
|
764 XUngrabServer(dpy); |
|
765 /* Workaround for bug 5039226 */ |
|
766 XSync(dpy, False); |
|
767 free((char*)sorted_targets); |
|
768 return -1; |
|
769 } |
|
770 memcpy(new_entry->targets, sorted_targets, |
|
771 sizeof(Atom) * num_targets); |
|
772 } else { |
|
773 new_entry->targets = NULL; |
|
774 } |
|
775 } |
|
776 |
|
777 targets_table->num_entries++; |
|
778 |
|
779 put_target_list_table(dpy, targets_table); |
|
780 |
|
781 XUngrabServer(dpy); |
|
782 /* Workaround for bug 5039226 */ |
|
783 XSync(dpy, False); |
|
784 |
|
785 ret = targets_table->num_entries - 1; |
|
786 |
|
787 free((char*)sorted_targets); |
|
788 |
|
789 for (i = 0; i < targets_table->num_entries; i++) { |
|
790 free((char*)targets_table->entries[i].targets); |
|
791 } |
|
792 |
|
793 free((char*)targets_table->entries); |
|
794 free((char*)targets_table); |
|
795 return ret; |
|
796 } |
|
797 |
|
798 /* |
|
799 * Retrieves the target list for the specified index. |
|
800 * Stores the number of targets in the list to 'num_targets' and the targets |
|
801 * to 'targets'. On failure stores 0 and NULL respectively. |
|
802 * The caller should free the allocated array when done with it. |
|
803 */ |
|
804 void |
|
805 get_target_list_for_index(Display* dpy, int index, Atom** targets, unsigned int* num_targets) { |
|
806 TargetsTable* table = get_target_list_table(dpy); |
|
807 TargetsTableEntry* entry = NULL; |
|
808 |
|
809 if (table == NULL) { |
|
810 DTRACE_PRINT2("%s:%d No target table.", __FILE__, __LINE__); |
|
811 *targets = NULL; |
|
812 *num_targets = 0; |
|
813 return; |
|
814 } |
|
815 |
|
816 if (table->num_entries <= index) { |
|
817 DTRACE_PRINT4("%s:%d index out of bounds idx=%d entries=%d", |
|
818 __FILE__, __LINE__, index, table->num_entries); |
|
819 *targets = NULL; |
|
820 *num_targets = 0; |
|
821 return; |
|
822 } |
|
823 |
|
824 entry = &table->entries[index]; |
|
825 |
|
826 *targets = (Atom*)malloc(entry->num_targets * sizeof(Atom)); |
|
827 |
|
828 if (*targets == NULL) { |
|
829 DTRACE_PRINT2("%s:%d malloc failed.", __FILE__, __LINE__); |
|
830 *num_targets = 0; |
|
831 return; |
|
832 } |
|
833 |
|
834 memcpy(*targets, entry->targets, entry->num_targets * sizeof(Atom)); |
|
835 *num_targets = entry->num_targets; |
|
836 } |
|
837 |
|
838 jint |
|
839 motif_to_java_actions(unsigned char motif_action) { |
|
840 jint java_action = java_awt_dnd_DnDConstants_ACTION_NONE; |
|
841 |
|
842 if (motif_action & MOTIF_DND_COPY) { |
|
843 java_action |= java_awt_dnd_DnDConstants_ACTION_COPY; |
|
844 } |
|
845 |
|
846 if (motif_action & MOTIF_DND_MOVE) { |
|
847 java_action |= java_awt_dnd_DnDConstants_ACTION_MOVE; |
|
848 } |
|
849 |
|
850 if (motif_action & MOTIF_DND_LINK) { |
|
851 java_action |= java_awt_dnd_DnDConstants_ACTION_LINK; |
|
852 } |
|
853 |
|
854 return java_action; |
|
855 } |
|
856 |
|
857 unsigned char |
|
858 java_to_motif_actions(jint java_action) { |
|
859 unsigned char motif_action = MOTIF_DND_NOOP; |
|
860 |
|
861 if (java_action & java_awt_dnd_DnDConstants_ACTION_COPY) { |
|
862 motif_action |= MOTIF_DND_COPY; |
|
863 } |
|
864 |
|
865 if (java_action & java_awt_dnd_DnDConstants_ACTION_MOVE) { |
|
866 motif_action |= MOTIF_DND_MOVE; |
|
867 } |
|
868 |
|
869 if (java_action & java_awt_dnd_DnDConstants_ACTION_LINK) { |
|
870 motif_action |= MOTIF_DND_LINK; |
|
871 } |
|
872 |
|
873 return motif_action; |
|
874 } |
|
875 |
|
876 Boolean |
|
877 awt_dnd_process_event(XEvent* event) { |
|
878 Boolean ret = awt_dnd_ds_process_event(event) || |
|
879 awt_dnd_dt_process_event(event); |
|
880 |
|
881 /* Extract the event from the queue if it is processed. */ |
|
882 if (ret) { |
|
883 XNextEvent(event->xany.display, event); |
|
884 } |
|
885 |
|
886 return ret; |
|
887 } |
|