src/kits/tracker/TrashWatcher.cpp

   1 /*
   2 Open Tracker License
   3
   4 Terms and Conditions
   5
   6 Copyright (c) 1991-2000, Be Incorporated. All rights reserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining a copy of
   9 this software and associated documentation files (the "Software"), to deal in
  10 the Software without restriction, including without limitation the rights to
  11 use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
  12 of the Software, and to permit persons to whom the Software is furnished to do
  13 so, subject to the following conditions:
  14
  15 The above copyright notice and this permission notice applies to all licensees
  16 and shall be included in all copies or substantial portions of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY,
  20 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  21 BE INCORPORATED BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  22 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF, OR IN CONNECTION
  23 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24
  25 Except as contained in this notice, the name of Be Incorporated shall not be
  26 used in advertising or otherwise to promote the sale, use or other dealings in
  27 this Software without prior written authorization from Be Incorporated.
  28
  29 Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks
  30 of Be Incorporated in the United States and other countries. Other brand product
  31 names are registered trademarks or trademarks of their respective holders.
  32 All rights reserved.
  33 */
  34
  35
  36 #include "TrashWatcher.h"
  37
  38 #include <string.h>
  39
  40 #include <Debug.h>
  41 #include <Directory.h>
  42 #include <NodeMonitor.h>
  43 #include <Path.h>
  44 #include <Volume.h>
  45 #include <VolumeRoster.h>
  46
  47 #include "Attributes.h"
  48 #include "Bitmaps.h"
  49 #include "FSUtils.h"
  50 #include "Tracker.h"
  51
  52
  53 //       #pragma mark - BTrashWatcher
  54
  55
  56 BTrashWatcher::BTrashWatcher()
  57         :
  58         BLooper("TrashWatcher", B_LOW_PRIORITY),
  59         fTrashNodeList(20, true)
  60 {
  61         FSCreateTrashDirs();
  62         WatchTrashDirs();
  63         fTrashFull = CheckTrashDirs();
  64         UpdateTrashIcons();
  65
  66         // watch volumes
  67         TTracker::WatchNode(0, B_WATCH_MOUNT, this);
  68 }
  69
  70
  71 BTrashWatcher::~BTrashWatcher()
  72 {
  73         stop_watching(this);
  74 }
  75
  76
  77 bool
  78 BTrashWatcher::IsTrashNode(const node_ref* testNode) const
  79 {
  80         int32 count = fTrashNodeList.CountItems();
  81         for (int32 index = 0; index < count; index++) {
  82                 node_ref* nref = fTrashNodeList.ItemAt(index);
  83                 if (nref->node == testNode->node && nref->device == testNode->device)
  84                         return true;
  85         }
  86
  87         return false;
  88 }
  89
  90
  91 void
  92 BTrashWatcher::MessageReceived(BMessage* message)
  93 {
  94         if (message->what != B_NODE_MONITOR) {
  95                 _inherited::MessageReceived(message);
  96                 return;
  97         }
  98
  99         switch (message->FindInt32("opcode")) {
 100                 case B_ENTRY_CREATED:
 101                         if (!fTrashFull) {
 102                                 fTrashFull = true;
 103                                 UpdateTrashIcons();
 104                         }
 105                         break;
 106
 107                 case B_ENTRY_MOVED:
 108                 {
 109                         // allow code to fall through if move is from/to trash
 110                         // but do nothing for moves in the same directory
 111                         ino_t toDir;
 112                         ino_t fromDir;
 113                         message->FindInt64("from directory", &fromDir);
 114                         message->FindInt64("to directory", &toDir);
 115                         if (fromDir == toDir)
 116                                 break;
 117                 }
 118                 // fall-through
 119                 case B_DEVICE_UNMOUNTED:
 120                 case B_ENTRY_REMOVED:
 121                 {
 122                         bool full = CheckTrashDirs();
 123                         if (fTrashFull != full) {
 124                                 fTrashFull = full;
 125                                 UpdateTrashIcons();
 126                         }
 127                         break;
 128                 }
 129                 // We should handle DEVICE_UNMOUNTED here too to remove trash
 130
 131                 case B_DEVICE_MOUNTED:
 132                 {
 133                         dev_t device;
 134                         BDirectory trashDir;
 135                         if (message->FindInt32("new device", &device) == B_OK
 136                                 && FSGetTrashDir(&trashDir, device) == B_OK) {
 137                                 node_ref trashNode;
 138                                 trashDir.GetNodeRef(&trashNode);
 139                                 TTracker::WatchNode(&trashNode, B_WATCH_DIRECTORY, this);
 140                                 fTrashNodeList.AddItem(new node_ref(trashNode));
 141
 142                                 // Check if the new volume has anything trashed.
 143                                 if (CheckTrashDirs() && !fTrashFull) {
 144                                         fTrashFull = true;
 145                                         UpdateTrashIcons();
 146                                 }
 147                         }
 148                         break;
 149                 }
 150         }
 151 }
 152
 153
 154 void
 155 BTrashWatcher::UpdateTrashIcons()
 156 {
 157         BVolumeRoster roster;
 158         BVolume volume;
 159         roster.Rewind();
 160
 161         BDirectory trashDir;
 162         while (roster.GetNextVolume(&volume) == B_OK) {
 163                 if (FSGetTrashDir(&trashDir, volume.Device()) == B_OK) {
 164                         // pull out the icons for the current trash state from resources
 165                         // and apply them onto the trash directory node
 166                         size_t vectorSize = 0;
 167                         const void* vectorData = GetTrackerResources()->LoadResource(
 168                                 B_VECTOR_ICON_TYPE,
 169                                 fTrashFull ? R_TrashFullIcon : R_TrashIcon, &vectorSize);
 170
 171                         if (vectorData) {
 172                                 trashDir.WriteAttr(kAttrIcon, B_VECTOR_ICON_TYPE, 0,
 173                                         vectorData, vectorSize);
 174                         } else
 175                                 TRESPASS();
 176                 }
 177         }
 178 }
 179
 180
 181 void
 182 BTrashWatcher::WatchTrashDirs()
 183 {
 184         BVolumeRoster volRoster;
 185         volRoster.Rewind();
 186         BVolume volume;
 187         while (volRoster.GetNextVolume(&volume) == B_OK) {
 188                 if (volume.IsReadOnly() || !volume.IsPersistent())
 189                         continue;
 190
 191                 BDirectory trashDir;
 192                 if (FSGetTrashDir(&trashDir, volume.Device()) == B_OK) {
 193                         node_ref trash_node;
 194                         trashDir.GetNodeRef(&trash_node);
 195                         watch_node(&trash_node, B_WATCH_DIRECTORY, this);
 196                         fTrashNodeList.AddItem(new node_ref(trash_node));
 197                 }
 198         }
 199 }
 200
 201
 202 bool
 203 BTrashWatcher::CheckTrashDirs()
 204 {
 205         BVolumeRoster volRoster;
 206         volRoster.Rewind();
 207         BVolume volume;
 208         while (volRoster.GetNextVolume(&volume) == B_OK) {
 209                 if (volume.IsReadOnly() || !volume.IsPersistent())
 210                         continue;
 211
 212                 BDirectory trashDir;
 213                 FSGetTrashDir(&trashDir, volume.Device());
 214                 trashDir.Rewind();
 215                 BEntry entry;
 216                 if (trashDir.GetNextEntry(&entry) == B_OK)
 217                         return true;
 218         }
 219
 220         return false;
 221 }