Make CrOS file manager determine .tar.gz/.tar.bz2 file type properly.

This CL modifies the FileType.getType function in the CrOS file manager
extension to use RegExp patterns to check for the type of a given file
URI, such that it determines .tar.bz and .tar.bz2 properly.

BUG=chromium-os:26952
TEST=Tested the following:
1. Verify that CrOS file manager correctly shows all the file types
   listed in FileType.types.
2. Use the built-in JavaScript profiler to profile FileType.getType
   with 1000 .html files (the last entry in FileType.types), and
   make sure that there is no noticable slowdown in FileType.getType.

Review URL: http://codereview.chromium.org/9478014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@124027 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/resources/file_manager/js/file_type.js

@@ -7,62 +7,75 @@
  */
 var FileType = {};
 
-FileType.types = {
+FileType.types = [
   // Images
-  'jpeg': {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'JPEG'},
-  'jpg':  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'JPEG'},
-  'bmp':  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'BMP'},
-  'gif':  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'GIF'},
-  'ico':  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'ICO'},
-  'png':  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'PNG'},
-  'webp': {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'WebP'},
+  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'JPEG',
+   pattern: /\.jpe?g$/i},
+  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'BMP',
+   pattern: /\.bmp$/i},
+  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'GIF',
+   pattern: /\.gif$/i},
+  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'ICO',
+   pattern: /\.ico$/i},
+  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'PNG',
+   pattern: /\.png$/i},
+  {type: 'image', name: 'IMAGE_FILE_TYPE', subtype: 'WebP',
+   pattern: /\.webp$/i},
 
   // Video
-  '3gp':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: '3GP'},
-  'avi':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'AVI'},
-  'mov':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'QuickTime'},
-  'mp4':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'MPEG'},
-  'm4v':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'MPEG'},
-  'mpg':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'MPEG'},
-  'mpeg': {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'MPEG'},
-  'mpg4': {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'MPEG'},
-  'mpeg4': {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'MPEG'},
-  'ogm':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'OGG'},
-  'ogv':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'OGG'},
-  'ogx':  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'OGG'},
-  'webm': {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'WebM'},
+  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: '3GP',
+   pattern: /\.3gp$/i},
+  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'AVI',
+   pattern: /\.avi$/i},
+  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'QuickTime',
+   pattern: /\.mov$/i},
+  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'MPEG',
+   pattern: /\.m(p4|4v|pg|peg|pg4|peg4)$/i},
+  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'OGG',
+   pattern: /\.og(m|v|x)$/i},
+  {type: 'video', name: 'VIDEO_FILE_TYPE', subtype: 'WebM',
+   pattern: /\.webm$/i},
 
   // Audio
-  'flac': {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'FLAC'},
-  'mp3':  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'MP3'},
-  'm4a':  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'MPEG'},
-  'oga':  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'OGG'},
-  'ogg':  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'OGG'},
-  'wav':  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'WAV'},
+  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'FLAC',
+   pattern: /\.flac$/i},
+  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'MP3',
+   pattern: /\.mp3$/i},
+  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'MPEG',
+   pattern: /\.m4a$/i},
+  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'OGG',
+   pattern: /\.og(a|g)$/i},
+  {type: 'audio', name: 'AUDIO_FILE_TYPE', subtype: 'WAV',
+   pattern: /\.wav$/i},
 
   // Text
-  'pod': {type: 'text', name: 'PLAIN_TEXT_FILE_TYPE', subtype: 'POD'},
-  'rst': {type: 'text', name: 'PLAIN_TEXT_FILE_TYPE', subtype: 'RST'},
-  'txt': {type: 'text', name: 'PLAIN_TEXT_FILE_TYPE', subtype: 'TXT'},
-  'log': {type: 'text', name: 'PLAIN_TEXT_FILE_TYPE', subtype: 'LOG'},
+  {type: 'text', name: 'PLAIN_TEXT_FILE_TYPE', subtype: 'POD',
+   pattern: /\.pod$/i},
+  {type: 'text', name: 'PLAIN_TEXT_FILE_TYPE', subtype: 'RST',
+   pattern: /\.rst$/i},
+  {type: 'text', name: 'PLAIN_TEXT_FILE_TYPE', subtype: 'TXT',
+   pattern: /\.txt$/i},
+  {type: 'text', name: 'PLAIN_TEXT_FILE_TYPE', subtype: 'LOG',
+   pattern: /\.log$/i},
 
-  // Others
-  'zip': {type: 'archive', name: 'ZIP_ARCHIVE_FILE_TYPE'},
-  'rar': {type: 'archive', name: 'RAR_ARCHIVE_FILE_TYPE'},
-  'tar': {type: 'archive', name: 'TAR_ARCHIVE_FILE_TYPE'},
-  'tar.bz2': {type: 'archive', name: 'TAR_BZIP2_ARCHIVE_FILE_TYPE'},
-  'tbz': {type: 'archive', name: 'TAR_BZIP2_ARCHIVE_FILE_TYPE'},
-  'tbz2': {type: 'archive', name: 'TAR_BZIP2_ARCHIVE_FILE_TYPE'},
-  'tar.gz': {type: 'archive', name: 'TAR_GZIP_ARCHIVE_FILE_TYPE'},
-  'tgz': {type: 'archive', name: 'TAR_GZIP_ARCHIVE_FILE_TYPE'},
+  // Archive
+  {type: 'archive', name: 'ZIP_ARCHIVE_FILE_TYPE', subtype:'ZIP',
+   pattern: /\.zip$/i},
+  {type: 'archive', name: 'RAR_ARCHIVE_FILE_TYPE', subtype:'RAR',
+   pattern: /\.rar$/i},
+  {type: 'archive', name: 'TAR_ARCHIVE_FILE_TYPE', subtype:'TAR',
+   pattern: /\.tar$/i},
+  {type: 'archive', name: 'TAR_BZIP2_ARCHIVE_FILE_TYPE', subtype:'TBZ2',
+   pattern: /\.(tar.bz2|tbz|tbz2)$/i},
+  {type: 'archive', name: 'TAR_GZIP_ARCHIVE_FILE_TYPE', subtype:'TGZ',
+   pattern: /\.(tar.|t)gz$/i},
 
-  'pdf': {type: 'text', icon: 'pdf', name: 'PDF_DOCUMENT_FILE_TYPE',
-          subtype: 'PDF'},
-  'html': {type: 'text', icon: 'html', name: 'HTML_DOCUMENT_FILE_TYPE',
-           subtype: 'HTML'},
-  'htm': {type: 'text', icon: 'html', name: 'HTML_DOCUMENT_FILE_TYPE',
-          subtype: 'HTML'}
-};
+  // Others
+  {type: 'text', icon: 'pdf', name: 'PDF_DOCUMENT_FILE_TYPE', subtype: 'PDF',
+   pattern: /\.pdf$/i},
+  {type: 'text', icon: 'html', name: 'HTML_DOCUMENT_FILE_TYPE', subtype: 'HTML',
+   pattern: /\.html?$/i}
+];
 
 FileType.previewArt = {
   'audio': 'images/filetype_large_audio.png',
@@ -73,22 +86,18 @@ FileType.previewArt = {
 };
 
 /**
- * Extract extension from the file name and convert it to lower case.
+ * Get the file type object that matches a given url.
  *
  * @param {string} url
- * @return {string}
+ * @return {Object} The matching file type object or an empty object.
  */
-FileType.getFileExtension_ = function (url) {
-  var extIndex = url.lastIndexOf('.');
-  if (extIndex < 0)
-    return '';
-  return url.substr(extIndex + 1).toLowerCase();
-};
-
 FileType.getType = function(url) {
-  var extension = FileType.getFileExtension_(url);
-  if (extension in FileType.types)
-    return FileType.types[extension];
+  var types = FileType.types;
+  for (var i = 0; i < types.length; i++) {
+    if (types[i].pattern.test(url)) {
+      return types[i];
+    }
+  }
   return {};
 };