Implement the file chooser as a new resource "host"

webkit/plugins/ppapi/ppb_file_chooser_impl.h

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef WEBKIT_PLUGINS_PPAPI_PPB_FILE_CHOOSER_IMPL_H_
-#define WEBKIT_PLUGINS_PPAPI_PPB_FILE_CHOOSER_IMPL_H_
-
-#include <string>
-#include <vector>
-
-#include "base/compiler_specific.h"
-#include "base/memory/ref_counted.h"
-#include "ppapi/c/dev/ppb_file_chooser_dev.h"
-#include "ppapi/shared_impl/array_writer.h"
-#include "ppapi/shared_impl/resource.h"
-#include "ppapi/thunk/ppb_file_chooser_api.h"
-#include "webkit/plugins/webkit_plugins_export.h"
-
-namespace ppapi {
-class TrackedCallback;
-}
-
-namespace WebKit {
-class WebString;
-}
-
-namespace webkit {
-namespace ppapi {
-
-class PPB_FileRef_Impl;
-
-class PPB_FileChooser_Impl : public ::ppapi::Resource,
-                             public ::ppapi::thunk::PPB_FileChooser_API {
- public:
-  // Structure to store the information of chosen files.
-  struct ChosenFileInfo {
-    ChosenFileInfo(const std::string& path, const std::string& display_name);
-    std::string path;
-    // |display_name| may be empty.
-    std::string display_name;
-  };
-
-  PPB_FileChooser_Impl(PP_Instance instance,
-                       PP_FileChooserMode_Dev mode,
-                       const char* accept_types);
-  virtual ~PPB_FileChooser_Impl();
-
-  static PP_Resource Create(PP_Instance instance,
-                            PP_FileChooserMode_Dev mode,
-                            const char* accept_types);
-
-  // Resource overrides.
-  virtual PPB_FileChooser_Impl* AsPPB_FileChooser_Impl();
-
-  // Resource overrides.
-  virtual ::ppapi::thunk::PPB_FileChooser_API* AsPPB_FileChooser_API() OVERRIDE;
-
-  // Stores the list of selected files.
-  void StoreChosenFiles(const std::vector<ChosenFileInfo>& files);
-
-  // Check that |callback| is valid (only non-blocking operation is supported)
-  // and that no callback is already pending. Returns |PP_OK| if okay, else
-  // |PP_ERROR_...| to be returned to the plugin.
-  int32_t ValidateCallback(scoped_refptr< ::ppapi::TrackedCallback> callback);
-
-  // Sets up |callback| as the pending callback. This should only be called once
-  // it is certain that |PP_OK_COMPLETIONPENDING| will be returned.
-  void RegisterCallback(scoped_refptr< ::ppapi::TrackedCallback> callback);
-
-  void RunCallback(int32_t result);
-
-  // PPB_FileChooser_API implementation.
-  virtual int32_t Show(
-      const PP_ArrayOutput& output,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual int32_t ShowWithoutUserGesture(
-      PP_Bool save_as,
-      PP_Var suggested_file_name,
-      const PP_ArrayOutput& output,
-      scoped_refptr< ::ppapi::TrackedCallback> callback);
-  virtual int32_t Show0_5(
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-  virtual PP_Resource GetNextChosenFile() OVERRIDE;
-  virtual int32_t ShowWithoutUserGesture0_5(
-      PP_Bool save_as,
-      PP_Var suggested_file_name,
-      scoped_refptr< ::ppapi::TrackedCallback> callback) OVERRIDE;
-
-  // Splits a comma-separated MIME type/extension list |accept_types|, trims the
-  // resultant split types, makes them lowercase, and returns them.
-  // Though this should be private, this is public for testing.
-  WEBKIT_PLUGINS_EXPORT static std::vector<WebKit::WebString> ParseAcceptValue(
-      const std::string& accept_types);
-
- private:
-  PP_FileChooserMode_Dev mode_;
-  std::string accept_types_;
-  scoped_refptr< ::ppapi::TrackedCallback> callback_;
-
-  // When using the v0.6 of the API, this will contain the output for the
-  // resources when the show command is complete. When using 0.5, this
-  // object will be is_null() and the chosen_files_ will be used instead.
-  ::ppapi::ArrayWriter output_;
-
-  // Used to store and iterate over the results when using 0.5 of the API.
-  // These are valid when we get a file result and output_ is not null.
-  std::vector< scoped_refptr<Resource> > chosen_files_;
-  size_t next_chosen_file_index_;
-};
-
-}  // namespace ppapi
-}  // namespace webkit
-
-#endif  // WEBKIT_PLUGINS_PPAPI_PPB_FILE_CHOOSER_IMPL_H_