This is the IPC and bits of the browser backend for FileWriter. The rest of

it's too tied together to include a small amount; this is the most-significant
chunk that I could put up without making too big a changelist.

The backend isn't complete, but you can see where it's going from here.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/3440021

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@60396 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 53 insertions, 0 deletions

diff --git a/chrome/browser/file_system/browser_file_system_callback_dispatcher.cc b/chrome/browser/file_system/browser_file_system_callback_dispatcher.cc
index 107515e..129d4a7 100644
--- a/chrome/browser/file_system/browser_file_system_callback_dispatcher.cc
+++ b/chrome/browser/file_system/browser_file_system_callback_dispatcher.cc
@@ -43,3 +43,12 @@ void BrowserFileSystemCallbackDispatcher::DidFail(
       request_id_, error_code));
   dispatcher_host_->RemoveCompletedOperation(request_id_);
 }
+
+void BrowserFileSystemCallbackDispatcher::DidWrite(
+    int64 bytes,
+    bool complete) {
+  dispatcher_host_->Send(new ViewMsg_FileSystem_DidWrite(
+      request_id_, bytes, complete));
+  if (complete)
+    dispatcher_host_->RemoveCompletedOperation(request_id_);
+}
diff --git a/chrome/browser/file_system/browser_file_system_callback_dispatcher.h b/chrome/browser/file_system/browser_file_system_callback_dispatcher.h
index 0372e09..075ae30 100644
--- a/chrome/browser/file_system/browser_file_system_callback_dispatcher.h
+++ b/chrome/browser/file_system/browser_file_system_callback_dispatcher.h
@@ -24,6 +24,7 @@ class BrowserFileSystemCallbackDispatcher
   virtual void DidOpenFileSystem(const string16& name,
                                  const FilePath& root_path);
   virtual void DidFail(base::PlatformFileError error_code);
+  virtual void DidWrite(int64 bytes, bool complete);
 
  private:
   scoped_refptr<FileSystemDispatcherHost> dispatcher_host_;
diff --git a/chrome/browser/file_system/file_system_dispatcher_host.cc b/chrome/browser/file_system/file_system_dispatcher_host.cc
index 385f2a4..5cfa5be 100644
--- a/chrome/browser/file_system/file_system_dispatcher_host.cc
+++ b/chrome/browser/file_system/file_system_dispatcher_host.cc
@@ -115,6 +115,9 @@ bool FileSystemDispatcherHost::OnMessageReceived(
     IPC_MESSAGE_HANDLER(ViewHostMsg_FileSystem_Create, OnCreate)
     IPC_MESSAGE_HANDLER(ViewHostMsg_FileSystem_Exists, OnExists)
     IPC_MESSAGE_HANDLER(ViewHostMsg_FileSystem_ReadDirectory, OnReadDirectory)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_FileSystem_Write, OnWrite)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_FileSystem_Truncate, OnTruncate)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_FileSystem_CancelWrite, OnCancel)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
   return handled;
@@ -206,6 +209,39 @@ void FileSystemDispatcherHost::OnReadDirectory(
   GetNewOperation(request_id)->ReadDirectory(path);
 }
 
+void FileSystemDispatcherHost::OnWrite(
+    int request_id,
+    const FilePath& path,
+    const GURL& blob_url,
+    int64 offset) {
+  if (!CheckValidFileSystemPath(path, request_id))
+    return;
+  GetNewOperation(request_id)->Write(path, blob_url, offset);
+}
+
+void FileSystemDispatcherHost::OnTruncate(
+    int request_id,
+    const FilePath& path,
+    int64 length) {
+  if (!CheckValidFileSystemPath(path, request_id))
+    return;
+  GetNewOperation(request_id)->Truncate(path, length);
+}
+
+void FileSystemDispatcherHost::OnCancel(
+    int request_id,
+    int request_id_to_cancel) {
+  fileapi::FileSystemOperation* write =
+      operations_.Lookup(request_id_to_cancel);
+  if (write) {
+    write->Cancel();
+    Send(new ViewMsg_FileSystem_DidSucceed(request_id));
+  } else {
+    Send(new ViewMsg_FileSystem_DidFail(
+        request_id, base::PLATFORM_FILE_ERROR_INVALID_OPERATION));
+  }
+}
+
 void FileSystemDispatcherHost::Send(IPC::Message* message) {
   DCHECK(ChromeThread::CurrentlyOn(ChromeThread::IO));
   if (!shutdown_ && message_sender_)
diff --git a/chrome/browser/file_system/file_system_dispatcher_host.h b/chrome/browser/file_system/file_system_dispatcher_host.h
index ac22255..561350c 100644
--- a/chrome/browser/file_system/file_system_dispatcher_host.h
+++ b/chrome/browser/file_system/file_system_dispatcher_host.h
@@ -17,6 +17,7 @@
 #include "webkit/fileapi/file_system_operation.h"
 
 class FileSystemHostContext;
+class GURL;
 class HostContentSettingsMap;
 class Receiver;
 class ResourceMessageFilter;
@@ -49,6 +50,12 @@ class FileSystemDispatcherHost
                 bool recursive);
   void OnExists(int request_id, const FilePath& path, bool is_directory);
   void OnReadDirectory(int request_id, const FilePath& path);
+  void OnWrite(int request_id,
+               const FilePath& path,
+               const GURL& blob_url,
+               int64 offset);
+  void OnTruncate(int request_id, const FilePath& path, int64 length);
+  void OnCancel(int request_id, int request_to_cancel);
   void Send(IPC::Message* message);
   void RemoveCompletedOperation(int request_id);