[MediaGallery] Filter hidden media files and folders.

BUG=161415
TEST=none


Review URL: https://chromiumcodereview.appspot.com/11413060

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@169120 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 61 insertions, 0 deletions

diff --git a/webkit/fileapi/media/filtering_file_enumerator.cc b/webkit/fileapi/media/filtering_file_enumerator.cc
index e1b9cc5..e291697 100644
--- a/webkit/fileapi/media/filtering_file_enumerator.cc
+++ b/webkit/fileapi/media/filtering_file_enumerator.cc
@@ -2,11 +2,69 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/file_path.h"
 #include "base/logging.h"
+#include "build/build_config.h"
 #include "webkit/fileapi/media/filtering_file_enumerator.h"
 
+#if defined(OS_WIN)
+#include <windows.h>
+#else
+#include <cstring>
+
+#include "base/string_util.h"
+#endif
+
 namespace fileapi {
 
+namespace {
+
+// Used to skip the hidden folders and files. Returns true if the file specified
+// by |path| should be skipped.
+bool ShouldSkip(const FilePath& path) {
+  const FilePath& base_name = path.BaseName();
+  if (base_name.empty())
+    return false;
+
+  // Dot files (aka hidden files)
+  if (base_name.value()[0] == '.')
+    return true;
+
+  // Mac OS X file.
+  if (base_name.value() == FILE_PATH_LITERAL("__MACOSX"))
+    return true;
+
+#if defined(OS_WIN)
+  DWORD file_attributes = ::GetFileAttributes(path.value().c_str());
+  if ((file_attributes != INVALID_FILE_ATTRIBUTES) &&
+      ((file_attributes & FILE_ATTRIBUTE_HIDDEN) != 0))
+    return true;
+#else
+  // Windows always creates a recycle bin folder in the attached device to store
+  // all the deleted contents. On non-windows operating systems, there is no way
+  // to get the hidden attribute of windows recycle bin folders that are present
+  // on the attached device. Therefore, compare the file path name to the
+  // recycle bin name and exclude those folders. For more details, please refer
+  // to http://support.microsoft.com/kb/171694.
+  const char win_98_recycle_bin_name[] = "RECYCLED";
+  const char win_xp_recycle_bin_name[] = "RECYCLER";
+  const char win_vista_recycle_bin_name[] = "$Recycle.bin";
+  if ((base::strncasecmp(base_name.value().c_str(),
+                         win_98_recycle_bin_name,
+                         strlen(win_98_recycle_bin_name)) == 0) ||
+      (base::strncasecmp(base_name.value().c_str(),
+                         win_xp_recycle_bin_name,
+                         strlen(win_xp_recycle_bin_name)) == 0) ||
+      (base::strncasecmp(base_name.value().c_str(),
+                         win_vista_recycle_bin_name,
+                         strlen(win_vista_recycle_bin_name)) == 0))
+    return true;
+#endif
+  return false;
+}
+
+}  // namespace
+
 FilteringFileEnumerator::FilteringFileEnumerator(
     scoped_ptr<FileSystemFileUtil::AbstractFileEnumerator> base_enumerator,
     MediaPathFilter* filter)
@@ -22,6 +80,9 @@ FilteringFileEnumerator::~FilteringFileEnumerator() {
 FilePath FilteringFileEnumerator::Next() {
   while (true) {
     FilePath next = base_enumerator_->Next();
+    if (ShouldSkip(next))
+      continue;
+
     if (next.empty() ||
         base_enumerator_->IsDirectory() ||
         filter_->Match(next))