xorg-server-1.4/hw/darwin/quartz/quartzPasteboard.c

   1 /**************************************************************
   2  * quartzPasteboard.c
   3  *
   4  * Aqua pasteboard <-> X cut buffer
   5  * Greg Parker     gparker@cs.stanford.edu     March 8, 2001
   6  **************************************************************/
   7 /*
   8  * Copyright (c) 2001 Greg Parker. All Rights Reserved.
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a
  11  * copy of this software and associated documentation files (the "Software"),
  12  * to deal in the Software without restriction, including without limitation
  13  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  14  * and/or sell copies of the Software, and to permit persons to whom the
  15  * Software is furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  21  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  23  * THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  24  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  25  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  26  * DEALINGS IN THE SOFTWARE.
  27  *
  28  * Except as contained in this notice, the name(s) of the above copyright
  29  * holders shall not be used in advertising or otherwise to promote the sale,
  30  * use or other dealings in this Software without prior written authorization.
  31  */
  32
  33 #ifdef HAVE_XORG_CONFIG_H
  34 #include <xorg-config.h>
  35 #endif
  36 #include "quartzPasteboard.h"
  37
  38 #include <X11/Xatom.h>
  39 #include "windowstr.h"
  40 #include "propertyst.h"
  41 #include "scrnintstr.h"
  42 #include "selection.h"
  43 #include "globals.h"
  44
  45 extern Selection *CurrentSelections;
  46 extern int NumCurrentSelections;
  47
  48
  49 // Helper function to read the X11 cut buffer
  50 // FIXME: What about multiple screens? Currently, this reads the first
  51 // CUT_BUFFER0 from the first screen where the buffer content is a string.
  52 // Returns a string on the heap that the caller must free.
  53 // Returns NULL if there is no cut text or there is not enough memory.
  54 static char * QuartzReadCutBuffer(void)
  55 {
  56     int i;
  57     char *text = NULL;
  58
  59     for (i = 0; i < screenInfo.numScreens; i++) {
  60         ScreenPtr pScreen = screenInfo.screens[i];
  61         PropertyPtr pProp;
  62
  63         pProp = wUserProps (WindowTable[pScreen->myNum]);
  64         while (pProp && pProp->propertyName != XA_CUT_BUFFER0) {
  65             pProp = pProp->next;
  66         }
  67         if (! pProp) continue;
  68         if (pProp->type != XA_STRING) continue;
  69         if (pProp->format != 8) continue;
  70
  71         text = xalloc(1 + pProp->size);
  72         if (! text) continue;
  73         memcpy(text, pProp->data, pProp->size);
  74         text[pProp->size] = '\0';
  75         return text;
  76     }
  77
  78     // didn't find any text
  79     return NULL;
  80 }
  81
  82 // Write X cut buffer to Mac OS X pasteboard
  83 // Called by ProcessInputEvents() in response to request from X server thread.
  84 void QuartzWritePasteboard(void)
  85 {
  86     char *text;
  87     text = QuartzReadCutBuffer();
  88     if (text) {
  89         QuartzWriteCocoaPasteboard(text);
  90         free(text);
  91     }
  92 }
  93
  94 #define strequal(a, b) (0 == strcmp((a), (b)))
  95
  96 // Read Mac OS X pasteboard into X cut buffer
  97 // Called by ProcessInputEvents() in response to request from X server thread.
  98 void QuartzReadPasteboard(void)
  99 {
 100     char *oldText = QuartzReadCutBuffer();
 101     char *text = QuartzReadCocoaPasteboard();
 102
 103     // Compare text with current cut buffer contents.
 104     // Change the buffer if both exist and are different
 105     //   OR if there is new text but no old text.
 106     // Otherwise, don't clear the selection unnecessarily.
 107
 108     if ((text && oldText && !strequal(text, oldText)) ||
 109         (text && !oldText)) {
 110         int scrn, sel;
 111
 112         for (scrn = 0; scrn < screenInfo.numScreens; scrn++) {
 113             ScreenPtr pScreen = screenInfo.screens[scrn];
 114             // Set the cut buffers on each screen
 115             // fixme really on each screen?
 116             ChangeWindowProperty(WindowTable[pScreen->myNum], XA_CUT_BUFFER0,
 117                                  XA_STRING, 8, PropModeReplace,
 118                                  strlen(text), (pointer)text, TRUE);
 119         }
 120
 121         // Undo any current X selection (similar to code in dispatch.c)
 122         // FIXME: what about secondary selection?
 123         // FIXME: only touch first XA_PRIMARY selection?
 124         sel = 0;
 125         while ((sel < NumCurrentSelections)  &&
 126                CurrentSelections[sel].selection != XA_PRIMARY)
 127             sel++;
 128         if (sel < NumCurrentSelections) {
 129             // Notify client if necessary
 130             if (CurrentSelections[sel].client) {
 131                 xEvent event;
 132
 133                 event.u.u.type = SelectionClear;
 134                 event.u.selectionClear.time = GetTimeInMillis();
 135                 event.u.selectionClear.window = CurrentSelections[sel].window;
 136                 event.u.selectionClear.atom = CurrentSelections[sel].selection;
 137                 TryClientEvents(CurrentSelections[sel].client, &event, 1,
 138                                 NoEventMask, NoEventMask /*CantBeFiltered*/,
 139                                 NullGrab);
 140             }
 141
 142             // Erase it
 143             // FIXME: need to erase .selection too? dispatch.c doesn't
 144             CurrentSelections[sel].pWin = NullWindow;
 145             CurrentSelections[sel].window = None;
 146             CurrentSelections[sel].client = NullClient;
 147         }
 148     }
 149
 150     if (text) free(text);
 151     if (oldText) free(oldText);
 152 }