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1 // Written in the D programming language
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2 // www.digitalmars.com/d/
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3
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4 /*
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5 * The contents of this file are subject to the Mozilla Public License Version
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6 * 1.1 (the "License"); you may not use this file except in compliance with
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7 * the License. You may obtain a copy of the License at
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8 * http://www.mozilla.org/MPL/
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9 *
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10 * Software distributed under the License is distributed on an "AS IS" basis,
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11 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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12 * for the specific language governing rights and limitations under the
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13 * License.
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14 *
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15 * The Original Code is the Dynamin library.
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16 *
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17 * The Initial Developer of the Original Code is Jordan Miner.
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18 * Portions created by the Initial Developer are Copyright (C) 2007-2009
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19 * the Initial Developer. All Rights Reserved.
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20 *
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21 * Contributor(s):
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22 * Jordan Miner <jminer7@gmail.com>
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23 *
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24 */
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25
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26 module dynamin.gui.x_clipboard;
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27
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28 public import dynamin.core.string;
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29 public import dynamin.core.environment;
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30 public import dynamin.gui.x_window;
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31
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32 // TODO: get notified of selection changes by using the XFixes extension
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33 // TODO: use the ClipboardManager to ensure that the clipboard data stays after
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34 // the program is closed
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35
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36 /* Fairly obvious, but:
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37 selecting but with no explicit copy should only set PRIMARY,
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38 never CLIPBOARD
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39
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40 middle mouse button should paste PRIMARY, never CLIPBOARD
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41
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42 explicit cut/copy commands (i.e. menu items, toolbar buttons)
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43 should always set CLIPBOARD to the currently-selected data (i.e. conceptually copy PRIMARY to CLIPBOARD)
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44
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45 explicit paste commands should paste CLIPBOARD, not PRIMARY
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46
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47 possibly contradicting the ICCCM, clients don't need to support
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48 SECONDARY, though if anyone can figure out what it's good for they should feel free to use it for that
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49 */
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50 extern(C) XBool isRequestOrNotify(XDisplay* d, XEvent* e, XPointer arg) {
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51 // either
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52 // - SelectionRequest & the msgWin is the owner
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53 // - SelectionNotify & another program is owner is giving data
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54 return (e.type == SelectionRequest || e.type == SelectionNotify) &&
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55 e.xany.window == msgWin;
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56
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57 }
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58
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59 string backend_getSelText(XAtom sel, ref ClipboardData data) {
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60 XConvertSelection(display, sel, XA.UTF8_STRING, XA.DYNAMIN_SELECTION, msgWin, CurrentTime);
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61 XSync(display, false);
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62 auto start = Environment.runningTime;
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63 XEvent ev;
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64 while(true) {
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65 // don't wait more than a second
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66 if(Environment.runningTime - start > 1000)
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67 return null;
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68 if(!XCheckIfEvent(display, &ev, &isRequestOrNotify, null))
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69 continue;
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70 if(ev.type == SelectionRequest)
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71 return data.data[0..data.length];
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72 // must be SelectionNotify past here
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73
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74 auto selEv = &ev.xselection;
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75 if(selEv.property == None)
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76 return null;
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77
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78 int count;
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79 char* propData = cast(char*)getXWindowProperty(display, msgWin,
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80 selEv.property, &count);
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81 scope(exit) XFree(propData);
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82 XDeleteProperty(display, msgWin, selEv.property);
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83
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84 string str = new char[count];
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85 str[] = propData[0..count];
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86 return str;
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87 }
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88 }
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89 struct ClipboardData {
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90 XAtom target;
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91 char* data;
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92 uint length; // number of bytes in data
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93 }
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94 // always called from the event thread...don't have to avoid static data
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95 void backend_setSelText(XAtom sel, string text, ref ClipboardData data) {
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96 XSetSelectionOwner(display, sel, msgWin, CurrentTime);
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97 data.target = XA.UTF8_STRING;
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98 data.data = text.ptr;
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99 data.length = text.length;
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100
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101 XConvertSelection(display, XA.CLIPBOARD_MANAGER, XA.SAVE_TARGETS, None, msgWin, CurrentTime);
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102 }
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103
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104 template ClipboardBackend() {
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105 ClipboardData data; // make array when supporting multiple types (PNG & BMP)
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106 void backend_setText(string text) {
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107 backend_setSelText(XA.CLIPBOARD, text, data);
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108 }
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109 string backend_getText() {
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110 return backend_getSelText(XA.CLIPBOARD, data);
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111 }
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112 bool backend_containsText() {
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113 return backend_getText() != null;
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114 }
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115 }
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116
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117 template SelectionBackend() {
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118 ClipboardData data; // make array when supporting multiple types (PNG & BMP)
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119 void backend_setText(string text) {
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120 backend_setSelText(XA.PRIMARY, text, data);
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121 }
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122 string backend_getText() {
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123 return backend_getSelText(XA.PRIMARY, data);
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124 }
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125 bool backend_containsText() {
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126 return backend_getText() != null;
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127 }
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128 }
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129
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