phajdan.jr@chromium.org
594f2f31fa
After this patch DirectoryWatcher when asked for recursive watch will scan the subtree and add inotify watches for each subfolder, but further changes to the tree structure won't trigger adding/removing watches. Support for really recursive watches is planned. This is just to divide the work, because the task is not easy. Based on patch by Janwar Dinata <j.dinata@gmail.com> reviewed at http://codereview.chromium.org/92151 http://crbug.com/8968 Review URL: http://codereview.chromium.org/115229 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@16070 0039d316-1c4b-4281-b951-d872f2087c98
61 linhas
2.0 KiB
C++
61 linhas
2.0 KiB
C++
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// This module provides a way to monitor a directory for changes.
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#ifndef BASE_DIRECTORY_WATCHER_H_
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#define BASE_DIRECTORY_WATCHER_H_
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#include "base/basictypes.h"
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#include "base/ref_counted.h"
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class FilePath;
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class MessageLoop;
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// This class lets you register interest in changes on a directory.
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// The delegate will get called whenever a file is added or changed in the
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// directory.
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class DirectoryWatcher {
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public:
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class Delegate {
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public:
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virtual ~Delegate() {}
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virtual void OnDirectoryChanged(const FilePath& path) = 0;
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};
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DirectoryWatcher();
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~DirectoryWatcher() {}
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// Register interest in any changes in the directory |path|.
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// OnDirectoryChanged will be called back for each change within the dir.
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// Any background operations will be ran on |backend_loop|, or inside Watch
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// if |backend_loop| is NULL. If |recursive| is true, the delegate will be
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// notified for each change within the directory tree starting at |path|.
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// Returns false on error.
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//
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// Note: on Windows you may got more notifications for non-recursive watch
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// than you expect, especially on versions earlier than Vista. The behavior
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// is consistent on any particular version of Windows, but not across
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// different versions.
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bool Watch(const FilePath& path, Delegate* delegate,
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MessageLoop* backend_loop, bool recursive) {
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return impl_->Watch(path, delegate, backend_loop, recursive);
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}
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// Used internally to encapsulate different members on different platforms.
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class PlatformDelegate : public base::RefCounted<PlatformDelegate> {
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public:
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virtual ~PlatformDelegate() {}
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virtual bool Watch(const FilePath& path, Delegate* delegate,
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MessageLoop* backend_loop, bool recursive) = 0;
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};
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private:
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scoped_refptr<PlatformDelegate> impl_;
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DISALLOW_COPY_AND_ASSIGN(DirectoryWatcher);
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};
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#endif // BASE_DIRECTORY_WATCHER_H_
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