Implement the file chooser as a new resource "host"

content/renderer/pepper/pepper_file_chooser_host.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 CONTENT_RENDERER_PEPPER_PEPPER_FILE_CHOOSER_HOST_H_
+#define CONTENT_RENDERER_PEPPER_PEPPER_FILE_CHOOSER_HOST_H_
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/memory/weak_ptr.h"
+#include "content/common/content_export.h"
+#include "ppapi/host/resource_host.h"
+#include "ppapi/proxy/resource_message_params.h"
+
+class RenderViewImpl;
+
+namespace content {
+
+class CONTENT_EXPORT PepperFileChooserHost
+    : public ppapi::host::ResourceHost,
+      public base::SupportsWeakPtr<PepperFileChooserHost> {
+ public:
+  // Structure to store the information of chosen files.
+  struct ChosenFileInfo {
+    ChosenFileInfo(const std::string& path, const std::string& display_name);
+    std::string path;
+    std::string display_name;  // May be empty.
+  };
+
+  PepperFileChooserHost(ppapi::host::PpapiHost* host,
+                        PP_Instance instance,
+                        PP_Resource resource,
+                        RenderViewImpl* render_view);
+  virtual ~PepperFileChooserHost();
+
+  virtual int32_t OnResourceMessageReceived(
+      const IPC::Message& msg,
+      ppapi::host::HostMessageContext* context) OVERRIDE;
+
+  void StoreChosenFiles(const std::vector<ChosenFileInfo>& files);
+
+ private:
+  class CompletionHandler;
+
+  int32_t OnMsgShow(ppapi::host::HostMessageContext* context,
+                    bool save_as,
+                    bool open_multiple,
+                    const std::string& suggested_file_name,
+                    const std::vector<std::string>& accept_mime_types);
+
+  RenderViewImpl* render_view_;
+
+  ppapi::proxy::ResourceMessageReplyParams reply_params_;
+  CompletionHandler* handler_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperFileChooserHost);
+};
+
+}  // namespace ppapi
+
+#endif  // CONTENT_RENDERER_PEPPER_PEPPER_FILE_CHOOSER_HOST_H_