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         wfree(view->droppableTypes);
  91     view->droppableTypes = NULL;
  92 }
  93
  94 /***********************************************************************/
  95
  96
  97 static unsigned
  98 defDraggingEntered(WMView *self, WMDraggingInfo *info)
  99 {
 100     printf("%x drag entered\n", W_VIEW_DRAWABLE(self));
 101     return WDOperationNone;
 102 }
 103
 104 static unsigned
 105 defDraggingUpdated(WMView *self, WMDraggingInfo *info)
 106 {
 107     printf("%x drag update\n", W_VIEW_DRAWABLE(self));
 108     return WDOperationNone;
 109 }
 110
 111 static void
 112 defDraggingExited(WMView *self, WMDraggingInfo *info)
 113 {
 114     printf("%x drag exit\n", W_VIEW_DRAWABLE(self));
 115 }
 116
 117 static Bool
 118 defPrepareForDragOperation(WMView *self, WMDraggingInfo *info)
 119 {
 120     printf("%x drag prepare\n", W_VIEW_DRAWABLE(self));
 121     return False;
 122 }
 123
 124 static Bool
 125 defPerformDragOperation(WMView *self, WMDraggingInfo *info)
 126 {
 127     printf("%x drag perform\n", W_VIEW_DRAWABLE(self));
 128     return False;
 129 }
 130
 131 static void
 132 defConcludeDragOperation(WMView *self, WMDraggingInfo *info)
 133 {
 134     printf("%x drag conclude\n", W_VIEW_DRAWABLE(self));
 135 }
 136
 137
 138
 139 void
 140 WMSetViewDragDestinationProcs(WMView *view, WMDragDestinationProcs *procs)
 141 {
 142     if (view->dragDestinationProcs == NULL) {
 143         view->dragDestinationProcs = wmalloc(sizeof(WMDragDestinationProcs));
 144     } else {
 145         free(view->dragDestinationProcs);
 146     }
 147     *view->dragDestinationProcs = *procs;
 148
 149     /*XXX fill in non-implemented stuffs */
 150     if (procs->draggingEntered == NULL) {
 151         view->dragDestinationProcs->draggingEntered = defDraggingEntered;
 152     }
 153     if (procs->draggingUpdated == NULL) {
 154         view->dragDestinationProcs->draggingUpdated = defDraggingUpdated;
 155     }
 156     if (procs->draggingExited == NULL) {
 157         view->dragDestinationProcs->draggingExited = defDraggingExited;
 158     }
 159     if (procs->prepareForDragOperation == NULL) {
 160         view->dragDestinationProcs->prepareForDragOperation =
 161             defPrepareForDragOperation;
 162     }
 163     if (procs->performDragOperation == NULL) {
 164         view->dragDestinationProcs->performDragOperation =
 165             defPerformDragOperation;
 166     }
 167     if (procs->concludeDragOperation == NULL) {
 168         view->dragDestinationProcs->concludeDragOperation =
 169             defConcludeDragOperation;
 170     }
 171 }
 172
 173
 174
 175 WMPoint
 176 WMGetDraggingInfoImageLocation(WMDraggingInfo *info)
 177 {
 178     return info->imageLocation;
 179 }
 180
 181
 182
 183 static void
 184 receivedData(WMView *view, Atom selection, Atom target, Time timestamp,
 185              void *cdata, WMData *data)
 186 {
 187
 188 }
 189
 190
 191
 192 Bool
 193 WMRequestDroppedData(WMView *view, WMDraggingInfo *info, char *type,
 194                      WMDropDataCallback *callback)
 195 {
 196 #if 0
 197     WMScreen *scr = W_VIEW_SCREEN(view);
 198     if (info->finished) {
 199         return False;
 200     }
 201
 202     if (type != NULL) {
 203         if (!WMRequestSelection(scr->dragInfo.destView,
 204                                 scr->xdndSelectionAtom,
 205                                 XInternAtom(scr->display, type, False),
 206                                 scr->dragInfo.timestamp,
 207                                 receivedData, &scr->dragInfo)) {
 208             wwarning("could not request data for dropped data");
 209
 210             /* send finished message */
 211             sendClientMessage(scr->display, source,
 212                               scr->xdndFinishedAtom,
 213                               scr->dragInfo.destinationWindow,
 214                               0, 0, 0, 0);
 215         }
 216     } else {
 217         /* send finished message */
 218         sendClientMessage(scr->display, source,
 219                           scr->xdndFinishedAtom,
 220                           scr->dragInfo.destinationWindow,
 221                           0, 0, 0, 0);
 222     }
 223 #endif
 224 }
 225
 226