Extract a minimal subset of WebDialogUI/WebDialogDelegate from src/chrome -> src/ui/web_dialogs

ui/web_dialogs/web_dialog_ui.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 UI_WEB_DIALOGS_WEB_DIALOG_UI_H_
+#define UI_WEB_DIALOGS_WEB_DIALOG_UI_H_
+#pragma once
+
+#include <string>
+
+#include "base/compiler_specific.h"
+#include "base/string16.h"
+#include "content/public/browser/web_contents_delegate.h"
+#include "content/public/browser/web_ui_controller.h"
+#include "googleurl/src/gurl.h"
+#include "ui/base/ui_base_types.h"
+#include "ui/web_dialogs/web_dialogs_export.h"
+
+
+namespace base {
+class ListValue;
+template<class T> class PropertyAccessor;
+}
+
+namespace content {
+class WebContents;
+class WebUIMessageHandler;
+struct ContextMenuParams;
+}
+
+namespace gfx {
+class Size;
+}
+
+namespace web_dialogs {

[tfarina, 2012/05/04 18:12:21]

Just to note, web_dialogs seems not a good namespace to me. Most if not all
classes in ui/ directory are in ui namespace. And web_dialogs seems redundat
because all classes in this API/module are prefixed with WebDialog.

+
+class WebDialogDelegate;
+
+// Displays file URL contents inside a modal web dialog.
+//
+// This application really should not use WebContents + WebUI. It should instead
+// just embed a RenderView in a dialog and be done with it.
+//
+// Before loading a URL corresponding to this WebUI, the caller should set its
+// delegate as a property on the WebContents. This WebUI will pick it up from
+// there and call it back. This is a bit of a hack to allow the dialog to pass
+// its delegate to the Web UI without having nasty accessors on the WebContents.
+// The correct design using RVH directly would avoid all of this.
+class WEB_DIALOGS_EXPORT WebDialogUI : public content::WebUIController {
+ public:
+  struct WebDialogParams {
+    // The URL for the content that will be loaded in the dialog.
+    GURL url;
+    // Width of the dialog.
+    int width;
+    // Height of the dialog.
+    int height;
+    // The JSON input to pass to the dialog when showing it.
+    std::string json_input;
+  };
+
+  // When created, the property should already be set on the WebContents.
+  explicit WebDialogUI(content::WebUI* web_ui);
+  virtual ~WebDialogUI();
+
+  // Close the dialog, passing the specified arguments to the close handler.
+  void CloseDialog(const base::ListValue* args);
+
+  // Returns the PropertyBag accessor object used to write the delegate pointer
+  // into the WebContents (see class-level comment above).
+  static base::PropertyAccessor<WebDialogDelegate*>& GetPropertyAccessor();
+
+ private:
+  // WebUIController
+  virtual void RenderViewCreated(
+      content::RenderViewHost* render_view_host) OVERRIDE;
+
+  // JS message handler.
+  void OnDialogClosed(const base::ListValue* args);
+
+  DISALLOW_COPY_AND_ASSIGN(WebDialogUI);
+};
+
+}  // namespace web_dialogs
+#endif  // UI_WEB_DIALOGS_WEB_DIALOG_UI_H_