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 // NodePreloader manages caching up icons from apps and prefs folder for 36 // fast display 37 // 38 39 #include <Debug.h> 40 #include <Directory.h> 41 #include <Entry.h> 42 #include <FindDirectory.h> 43 #include <Node.h> 44 #include <NodeMonitor.h> 45 #include <Path.h> 46 47 #include "AutoLock.h" 48 #include "IconCache.h" 49 #include "NodePreloader.h" 50 #include "Thread.h" 51 #include "Tracker.h" 52 53 54 NodePreloader* 55 NodePreloader::InstallNodePreloader(const char* name, BLooper* host) 56 { 57 NodePreloader* result = new NodePreloader(name); 58 { 59 AutoLock<BLooper> lock(host); 60 if (!lock) { 61 delete result; 62 return NULL; 63 } 64 65 host->AddHandler(result); 66 } 67 result->Run(); 68 69 return result; 70 } 71 72 73 NodePreloader::NodePreloader(const char* name) 74 : 75 BHandler(name), 76 fModelList(20, true), 77 fQuitRequested(false) 78 { 79 } 80 81 82 NodePreloader::~NodePreloader() 83 { 84 // block deletion while we are locked 85 fQuitRequested = true; 86 fLock.Lock(); 87 } 88 89 90 void 91 NodePreloader::Run() 92 { 93 fLock.Lock(); 94 Thread::Launch(NewMemberFunctionObject(&NodePreloader::Preload, this)); 95 } 96 97 98 Model* 99 NodePreloader::FindModel(node_ref itemNode) const 100 { 101 for (int32 count = fModelList.CountItems() - 1; count >= 0; count--) { 102 Model* model = fModelList.ItemAt(count); 103 if (*model->NodeRef() == itemNode) 104 return model; 105 } 106 107 return NULL; 108 } 109 110 111 void 112 NodePreloader::MessageReceived(BMessage* message) 113 { 114 // respond to node monitor notifications 115 116 node_ref itemNode; 117 switch (message->what) { 118 case B_NODE_MONITOR: 119 { 120 switch (message->FindInt32("opcode")) { 121 case B_ENTRY_REMOVED: 122 { 123 AutoLock<Benaphore> locker(fLock); 124 message->FindInt32("device", &itemNode.device); 125 message->FindInt64("node", &itemNode.node); 126 Model* model = FindModel(itemNode); 127 if (model == NULL) 128 break; 129 130 //PRINT(("preloader removing file %s\n", model->Name())); 131 IconCache::sIconCache->Removing(model); 132 fModelList.RemoveItem(model); 133 break; 134 } 135 136 case B_ATTR_CHANGED: 137 case B_STAT_CHANGED: 138 { 139 AutoLock<Benaphore> locker(fLock); 140 message->FindInt32("device", &itemNode.device); 141 message->FindInt64("node", &itemNode.node); 142 143 const char* attrName; 144 message->FindString("attr", &attrName); 145 Model* model = FindModel(itemNode); 146 if (model == NULL) 147 break; 148 149 BModelOpener opener(model); 150 IconCache::sIconCache->IconChanged(model->ResolveIfLink()); 151 //PRINT(("preloader updating file %s\n", model->Name())); 152 break; 153 } 154 } 155 break; 156 } 157 158 default: 159 _inherited::MessageReceived(message); 160 break; 161 } 162 } 163 164 165 void 166 NodePreloader::PreloadOne(const char* dirPath) 167 { 168 //PRINT(("preloading directory %s\n", dirPath)); 169 BDirectory dir(dirPath); 170 if (dir.InitCheck() != B_OK) 171 return; 172 173 node_ref nodeRef; 174 dir.GetNodeRef(&nodeRef); 175 176 // have to node monitor the whole directory 177 TTracker::WatchNode(&nodeRef, B_WATCH_DIRECTORY, this); 178 179 dir.Rewind(); 180 for (;;) { 181 entry_ref ref; 182 if (dir.GetNextRef(&ref) != B_OK) 183 break; 184 185 BEntry entry(&ref); 186 if (!entry.IsFile()) 187 // only interrested in files 188 continue; 189 190 Model* model = new Model(&ref, true); 191 if (model->InitCheck() == B_OK && model->IconFrom() == kUnknownSource) { 192 TTracker::WatchNode(model->NodeRef(), 193 B_WATCH_STAT | B_WATCH_ATTR, this); 194 IconCache::sIconCache->Preload(model, kNormalIcon, 195 IconCache::sMiniIconSize, true); 196 fModelList.AddItem(model); 197 model->CloseNode(); 198 } else 199 delete model; 200 } 201 } 202 203 204 void 205 NodePreloader::Preload() 206 { 207 for (int32 count = 100; count >= 0; count--) { 208 // wait for a little bit before going ahead to reduce disk access 209 // contention 210 snooze(100000); 211 if (fQuitRequested) { 212 fLock.Unlock(); 213 return; 214 } 215 } 216 217 BMessenger messenger(kTrackerSignature); 218 if (!messenger.IsValid()) { 219 // put out some message here! 220 return; 221 } 222 223 ASSERT(fLock.IsLocked()); 224 BPath path; 225 if (find_directory(B_BEOS_APPS_DIRECTORY, &path) == B_OK) 226 PreloadOne(path.Path()); 227 228 if (find_directory(B_BEOS_PREFERENCES_DIRECTORY, &path) == B_OK) 229 PreloadOne(path.Path()); 230 231 fLock.Unlock(); 232 } 233