chrome/browser/storage_monitor/image_capture_device.mm

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #import "chrome/browser/storage_monitor/image_capture_device.h"
   6
   7 #include "base/file_util.h"
   8 #include "content/public/browser/browser_thread.h"
   9
  10 namespace {
  11
  12 base::PlatformFileError RenameFile(const base::FilePath& downloaded_filename,
  13                                    const base::FilePath& desired_filename) {
  14   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::FILE));
  15   bool success = base::ReplaceFile(downloaded_filename, desired_filename, NULL);
  16   return success ? base::PLATFORM_FILE_OK : base::PLATFORM_FILE_ERROR_NOT_FOUND;
  17 }
  18
  19 void ReturnRenameResultToListener(
  20     base::WeakPtr<ImageCaptureDeviceListener> listener,
  21     const std::string& name,
  22     const base::PlatformFileError& result) {
  23   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  24   if (listener)
  25     listener->DownloadedFile(name, result);
  26 }
  27
  28 base::Time NSDateToBaseTime(NSDate* date) {
  29   return base::Time::FromDoubleT([date timeIntervalSince1970]);
  30 }
  31
  32 base::FilePath PathForCameraItem(ICCameraItem* item) {
  33   std::string name = base::SysNSStringToUTF8([item name]);
  34
  35   std::vector<std::string> components;
  36   ICCameraFolder* folder = [item parentFolder];
  37   while (folder != nil) {
  38     components.push_back(base::SysNSStringToUTF8([folder name]));
  39     folder = [folder parentFolder];
  40   }
  41   base::FilePath path;
  42   for (std::vector<std::string>::reverse_iterator i = components.rbegin();
  43        i != components.rend(); ++i) {
  44     path = path.Append(*i);
  45   }
  46   path = path.Append(name);
  47
  48   return path;
  49 }
  50
  51 }  // namespace
  52
  53 @implementation ImageCaptureDevice
  54
  55 - (id)initWithCameraDevice:(ICCameraDevice*)cameraDevice {
  56   if ((self = [super init])) {
  57     camera_.reset([cameraDevice retain]);
  58     [camera_ setDelegate:self];
  59     closing_ = false;
  60   }
  61   return self;
  62 }
  63
  64 - (void)dealloc {
  65   // Make sure the session was closed and listener set to null
  66   // before destruction.
  67   DCHECK(![camera_ delegate]);
  68   DCHECK(!listener_);
  69   [super dealloc];
  70 }
  71
  72 - (void)setListener:(base::WeakPtr<ImageCaptureDeviceListener>)listener {
  73   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  74   listener_ = listener;
  75 }
  76
  77 - (void)open {
  78   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  79   DCHECK(listener_);
  80   [camera_ requestOpenSession];
  81 }
  82
  83 - (void)close {
  84   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  85   closing_ = true;
  86   [camera_ cancelDownload];
  87   [camera_ requestCloseSession];
  88   [camera_ setDelegate:nil];
  89   listener_.reset();
  90 }
  91
  92 - (void)eject {
  93   [camera_ requestEjectOrDisconnect];
  94 }
  95
  96 - (void)downloadFile:(const std::string&)name
  97            localPath:(const base::FilePath&)localPath {
  98   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  99
 100   // Find the file with that name and start download.
 101   for (ICCameraItem* item in [camera_ mediaFiles]) {
 102     std::string itemName = PathForCameraItem(item).value();
 103     if (itemName == name) {
 104       // To create save options for ImageCapture, we need to
 105       // split the target filename into directory/name
 106       // and encode the directory as a URL.
 107       NSString* saveDirectory =
 108           base::mac::FilePathToNSString(localPath.DirName());
 109       NSString* saveFilename =
 110           base::mac::FilePathToNSString(localPath.BaseName());
 111
 112       NSMutableDictionary* options =
 113           [NSMutableDictionary dictionaryWithCapacity:3];
 114       [options setObject:[NSURL fileURLWithPath:saveDirectory isDirectory:YES]
 115                   forKey:ICDownloadsDirectoryURL];
 116       [options setObject:saveFilename forKey:ICSaveAsFilename];
 117       [options setObject:[NSNumber numberWithBool:YES] forKey:ICOverwrite];
 118
 119       [camera_ requestDownloadFile:base::mac::ObjCCastStrict<ICCameraFile>(item)
 120                            options:options
 121                   downloadDelegate:self
 122                didDownloadSelector:
 123                    @selector(didDownloadFile:error:options:contextInfo:)
 124                        contextInfo:NULL];
 125       return;
 126     }
 127   }
 128
 129   if (listener_)
 130     listener_->DownloadedFile(name, base::PLATFORM_FILE_ERROR_NOT_FOUND);
 131 }
 132
 133 - (void)cameraDevice:(ICCameraDevice*)camera didAddItem:(ICCameraItem*)item {
 134   base::PlatformFileInfo info;
 135   if ([[item UTI] isEqualToString:base::mac::CFToNSCast(kUTTypeFolder)])
 136     info.is_directory = true;
 137   else
 138     info.size = [base::mac::ObjCCastStrict<ICCameraFile>(item) fileSize];
 139
 140   base::FilePath path = PathForCameraItem(item);
 141
 142   info.last_modified = NSDateToBaseTime([item modificationDate]);
 143   info.creation_time = NSDateToBaseTime([item creationDate]);
 144   info.last_accessed = info.last_modified;
 145
 146   if (listener_)
 147     listener_->ItemAdded(path.value(), info);
 148 }
 149
 150 - (void)cameraDevice:(ICCameraDevice*)camera didAddItems:(NSArray*)items {
 151   for (ICCameraItem* item in items)
 152     [self cameraDevice:camera didAddItem:item];
 153 }
 154
 155 - (void)didRemoveDevice:(ICDevice*)device {
 156   device.delegate = NULL;
 157   if (listener_)
 158     listener_->DeviceRemoved();
 159 }
 160
 161 // Notifies that a session was opened with the given device; potentially
 162 // with an error.
 163 - (void)device:(ICDevice*)device didOpenSessionWithError:(NSError*)error {
 164   if (error)
 165     [self didRemoveDevice:camera_];
 166 }
 167
 168 - (void)device:(ICDevice*)device didEncounterError:(NSError*)error {
 169   if (error && listener_)
 170     listener_->DeviceRemoved();
 171 }
 172
 173 // When this message is received, all media metadata is now loaded.
 174 - (void)deviceDidBecomeReadyWithCompleteContentCatalog:(ICDevice*)device {
 175   if (listener_)
 176     listener_->NoMoreItems();
 177 }
 178
 179 - (void)didDownloadFile:(ICCameraFile*)file
 180                   error:(NSError*)error
 181                 options:(NSDictionary*)options
 182             contextInfo:(void*)contextInfo {
 183   if (closing_)
 184     return;
 185
 186   std::string name = PathForCameraItem(file).value();
 187
 188   if (error) {
 189     DLOG(INFO) << "error..."
 190                << base::SysNSStringToUTF8([error localizedDescription]);
 191     if (listener_)
 192       listener_->DownloadedFile(name, base::PLATFORM_FILE_ERROR_FAILED);
 193     return;
 194   }
 195
 196   std::string savedFilename =
 197       base::SysNSStringToUTF8([options objectForKey:ICSavedFilename]);
 198   std::string saveAsFilename =
 199       base::SysNSStringToUTF8([options objectForKey:ICSaveAsFilename]);
 200   if (savedFilename == saveAsFilename) {
 201     if (listener_)
 202       listener_->DownloadedFile(name, base::PLATFORM_FILE_OK);
 203     return;
 204   }
 205
 206   // ImageCapture did not save the file into the name we gave it in the
 207   // options. It picks a new name according to its best lights, so we need
 208   // to rename the file.
 209   base::FilePath saveDir(base::SysNSStringToUTF8(
 210       [[options objectForKey:ICDownloadsDirectoryURL] path]));
 211   base::FilePath saveAsPath = saveDir.Append(saveAsFilename);
 212   base::FilePath savedPath = saveDir.Append(savedFilename);
 213   // Shared result value from file-copy closure to tell-listener closure.
 214   content::BrowserThread::PostTaskAndReplyWithResult(
 215       content::BrowserThread::FILE,
 216       FROM_HERE,
 217       base::Bind(&RenameFile, savedPath, saveAsPath),
 218       base::Bind(&ReturnRenameResultToListener, listener_, name));
 219 }
 220
 221 @end  // ImageCaptureDevice