WINGs/dragdestination.c

   1
   2
   3 #include <X11/Xatom.h>
   4
   5 #include "WINGsP.h"
   6
   7
   8 /* dropping */
   9
  10 typedef struct W_DNDTargetInfo {
  11     /* data types accepted for drops */
  12     Atom *dropTypes;
  13     int dropTypeCount;
  14
  15
  16 } DNDTargetInfo;
  17
  18
  19 static Atom XDNDversion = XDND_VERSION;
  20
  21
  22 static void
  23 realizedObserver(void *self, WMNotification *notif)
  24 {
  25     WMView *view = (WMView*)WMGetNotificationObject(notif);
  26
  27     XChangeProperty(W_VIEW_SCREEN(view)->display, W_VIEW_DRAWABLE(view),
  28                     W_VIEW_SCREEN(view)->xdndAwareAtom,
  29                     XA_ATOM, 32, PropModeReplace,
  30                     (unsigned char*)&XDNDversion, 1);
  31
  32     WMRemoveNotificationObserver(self);
  33 }
  34
  35
  36 void
  37 W_SetXdndAwareProperty(WMScreen *scr, WMView *view, Atom *types, int typeCount)
  38 {
  39     Display *dpy = scr->display;
  40
  41     view = W_TopLevelOfView(view);
  42
  43     if (!view->flags.xdndHintSet) {
  44         view->flags.xdndHintSet = 1;
  45
  46         if (view->flags.realized) {
  47             XChangeProperty(dpy, W_VIEW_DRAWABLE(view), scr->xdndAwareAtom,
  48                             XA_ATOM, 32, PropModeReplace,
  49                             (unsigned char*)&XDNDversion, 1);
  50         } else {
  51             WMAddNotificationObserver(realizedObserver,
  52                                       /* just use as an id */
  53                                       &view->dragDestinationProcs,
  54                                       WMViewRealizedNotification,
  55                                       view);
  56         }
  57     }
  58 }
  59
  60
  61
  62 void
  63 WMRegisterViewForDraggedTypes(WMView *view, char *acceptedTypes[])
  64 {
  65     Atom *types;
  66     int typeCount;
  67     int i;
  68
  69     typeCount = 0;
  70     while (acceptedTypes[typeCount++]);
  71
  72     types = wmalloc(sizeof(Atom)*(typeCount+1));
  73
  74     for (i = 0; i < typeCount; i++) {
  75         types[i] = XInternAtom(W_VIEW_SCREEN(view)->display,
  76                                acceptedTypes[i], False);
  77     }
  78     types[i] = 0;
  79
  80     view->droppableTypes = types;
  81
  82     W_SetXdndAwareProperty(W_VIEW_SCREEN(view), view, types, typeCount);
  83 }
  84
  85
  86 void
  87 WMUnregisterViewDraggedTypes(WMView *view)
  88 {
  89     if (view->droppableTypes != NULL)
  90         free(view->droppableTypes);
  91     view->droppableTypes = NULL;
  92 }
  93
  94 /***********************************************************************/
  95
  96
  97 static unsigned defDraggingEntered(WMView *self, WMDraggingInfo *info)
  98 {
  99     return WDOperationNone;
 100 }
 101
 102 static unsigned defDraggingUpdated(WMView *self, WMDraggingInfo *info)
 103 {
 104     return WDOperationNone;
 105 }
 106
 107 static void defDraggingExited(WMView *self, WMDraggingInfo *info)
 108 {
 109 }
 110
 111 static Bool defPrepareForDragOperation(WMView *self, WMDraggingInfo *info)
 112 {
 113     return False;
 114 }
 115
 116 static Bool defPerformDragOperation(WMView *self, WMDraggingInfo *info)
 117 {
 118     return False;
 119 }
 120
 121 static void defConcludeDragOperation(WMView *self, WMDraggingInfo *info)
 122 {
 123 }
 124
 125
 126
 127 void
 128 WMSetViewDragDestinationProcs(WMView *view, WMDragDestinationProcs *procs)
 129 {
 130     if (view->dragDestinationProcs == NULL) {
 131         free(view->dragDestinationProcs);
 132         view->dragDestinationProcs = wmalloc(sizeof(WMDragDestinationProcs));
 133     }
 134     *view->dragDestinationProcs = *procs;
 135
 136     /*XXX fill in non-implemented stuffs */
 137     if (procs->draggingEntered == NULL) {
 138         view->dragDestinationProcs->draggingEntered = defDraggingEntered;
 139     }
 140     if (procs->draggingUpdated == NULL) {
 141         view->dragDestinationProcs->draggingUpdated = defDraggingUpdated;
 142     }
 143     if (procs->draggingExited == NULL) {
 144         view->dragDestinationProcs->draggingExited = defDraggingExited;
 145     }
 146     if (procs->prepareForDragOperation == NULL) {
 147         view->dragDestinationProcs->prepareForDragOperation =
 148             defPrepareForDragOperation;
 149     }
 150     if (procs->performDragOperation == NULL) {
 151         view->dragDestinationProcs->performDragOperation =
 152             defPerformDragOperation;
 153     }
 154     if (procs->concludeDragOperation == NULL) {
 155         view->dragDestinationProcs->concludeDragOperation =
 156             defConcludeDragOperation;
 157     }
 158 }
 159
 160
 161
 162
 163
 164
 165
 166 WMPoint WMGetDraggingInfoImageLocation(WMDraggingInfo *info)
 167 {
 168     return info->imageLocation;
 169 }
 170
 171
 172
 173 static void
 174 receivedData(WMView *view, Atom selection, Atom target, Time timestamp,
 175              void *cdata, WMData *data)
 176 {
 177
 178 }
 179
 180
 181
 182 Bool WMRequestDroppedData(WMView *view, WMDraggingInfo *info, char *type,
 183                           WMDropDataCallback *callback)
 184 {
 185     WMScreen *scr = W_VIEW_SCREEN(view);
 186 #if 0
 187     if (info->finished) {
 188         return False;
 189     }
 190
 191     if (type != NULL) {
 192         if (!WMRequestSelection(scr->dragInfo.destView,
 193                                 scr->xdndSelectionAtom,
 194                                 XInternAtom(scr->display, type, False),
 195                                 scr->dragInfo.timestamp,
 196                                 receivedData, &scr->dragInfo)) {
 197             wwarning("could not request data for dropped data");
 198
 199             /* send finished message */
 200             sendClientMessage(scr->display, source,
 201                               scr->xdndFinishedAtom,
 202                               scr->dragInfo.destinationWindow,
 203                               0, 0, 0, 0);
 204         }
 205     } else {
 206         /* send finished message */
 207         sendClientMessage(scr->display, source,
 208                           scr->xdndFinishedAtom,
 209                           scr->dragInfo.destinationWindow,
 210                           0, 0, 0, 0);
 211     }
 212 #endif
 213 }
 214
 215