Re-land alexbost's experimental Offscreen Tabs API work.

chrome/browser/extensions/extension_offscreen_tabs_module.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 CHROME_BROWSER_EXTENSIONS_EXTENSION_OFFSCREEN_TABS_MODULE_H__
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_OFFSCREEN_TABS_MODULE_H__
+#pragma once
+
+#include <string>
+
+#include "base/values.h"
+#include "chrome/browser/extensions/extension_function.h"
+#include "chrome/browser/extensions/extension_tabs_module.h"
+#include "content/public/browser/notification_observer.h"
+#include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/web_contents_observer.h"
+
+// For the moment we make the offscreen tabs module depend on the tabs
+// module so we can share some code between them. The long-term goal
+// is to fold the offscreen tabs functionality into the tabs API
+// anyway.
+
+class BackingStore;
+class SkBitmap;
+
+// Creates an offscreen tab and adds it to a map of tabs and their child
+// offscreen tabs.
+class CreateOffscreenTabFunction : public SyncExtensionFunction {
+ public:
+  CreateOffscreenTabFunction();
+ private:
+  virtual ~CreateOffscreenTabFunction();
+  virtual bool RunImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.create")
+  DISALLOW_COPY_AND_ASSIGN(CreateOffscreenTabFunction);
+};
+
+// Gets info about an offscreen tab.
+class GetOffscreenTabFunction : public SyncExtensionFunction {
+ public:
+  GetOffscreenTabFunction();
+ private:
+  virtual ~GetOffscreenTabFunction();
+  virtual bool RunImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.get")
+  DISALLOW_COPY_AND_ASSIGN(GetOffscreenTabFunction);
+};
+
+// Gets all offscreen tabs created by the tab that invoked this function.
+class GetAllOffscreenTabFunction : public SyncExtensionFunction {
+ public:
+  GetAllOffscreenTabFunction();
+ private:
+  virtual ~GetAllOffscreenTabFunction();
+  virtual bool RunImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.getAll")
+  DISALLOW_COPY_AND_ASSIGN(GetAllOffscreenTabFunction);
+};
+
+// Removes an offscreen tab.
+class RemoveOffscreenTabFunction : public SyncExtensionFunction {
+ public:
+  RemoveOffscreenTabFunction();
+ private:
+  virtual ~RemoveOffscreenTabFunction();
+  virtual bool RunImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.remove")
+  DISALLOW_COPY_AND_ASSIGN(RemoveOffscreenTabFunction);
+};
+
+// Synthesizes a keyboard event based on a passed-in JavaScript keyboard event.
+class SendKeyboardEventOffscreenTabFunction : public SyncExtensionFunction {
+ public:
+  SendKeyboardEventOffscreenTabFunction();
+ private:
+  virtual ~SendKeyboardEventOffscreenTabFunction();
+  virtual bool RunImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME(
+    "experimental.offscreenTabs.sendKeyboardEvent")
+  DISALLOW_COPY_AND_ASSIGN(SendKeyboardEventOffscreenTabFunction);
+};
+
+// Synthesizes a mouse event based on a passed-in JavaScript mouse event.
+// Since only the application knows where the user clicks, x and y coordinates
+// need to be passed in as well in this case of click, mousedown, and mouseup.
+class SendMouseEventOffscreenTabFunction : public SyncExtensionFunction {
+ public:
+  SendMouseEventOffscreenTabFunction();
+ private:
+  virtual ~SendMouseEventOffscreenTabFunction();
+  virtual bool RunImpl() OVERRIDE;
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.sendMouseEvent")
+  DISALLOW_COPY_AND_ASSIGN(SendMouseEventOffscreenTabFunction);
+};
+
+// Gets a snapshot of the offscreen tab and returns it as a data URL.
+class ToDataUrlOffscreenTabFunction : public CaptureVisibleTabFunction {
+ public:
+  ToDataUrlOffscreenTabFunction();
+ private:
+  virtual ~ToDataUrlOffscreenTabFunction();
+  virtual bool RunImpl() OVERRIDE;
+
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.toDataUrl")
+  DISALLOW_COPY_AND_ASSIGN(ToDataUrlOffscreenTabFunction);
+};
+
+// Updates an offscreen tab.
+class UpdateOffscreenTabFunction : public UpdateTabFunction {
+ public:
+  UpdateOffscreenTabFunction();
+
+ private:
+  virtual ~UpdateOffscreenTabFunction();
+  virtual bool RunImpl() OVERRIDE;
+
+  DECLARE_EXTENSION_FUNCTION_NAME("experimental.offscreenTabs.update")
+  DISALLOW_COPY_AND_ASSIGN(UpdateOffscreenTabFunction);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_OFFSCREEN_TABS_MODULE_H__
+