ui/web_dialogs/web_dialog_ui.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef UI_WEB_DIALOGS_WEB_DIALOG_UI_H_
   6 #define UI_WEB_DIALOGS_WEB_DIALOG_UI_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/strings/string16.h"
  13 #include "content/public/browser/web_contents_delegate.h"
  14 #include "content/public/browser/web_ui_controller.h"
  15 #include "ui/base/ui_base_types.h"
  16 #include "ui/web_dialogs/web_dialogs_export.h"
  17 #include "url/gurl.h"
  18
  19 namespace content {
  20 class WebContents;
  21 class WebUIMessageHandler;
  22 struct ContextMenuParams;
  23 }
  24
  25 namespace gfx {
  26 class Size;
  27 }
  28
  29 namespace ui {
  30
  31 class WebDialogDelegate;
  32
  33 // Displays file URL contents inside a modal web dialog.
  34 //
  35 // This application really should not use WebContents + WebUI. It should instead
  36 // just embed a RenderView in a dialog and be done with it.
  37 //
  38 // Before loading a URL corresponding to this WebUI, the caller should set its
  39 // delegate as user data on the WebContents by calling SetDelegate(). This WebUI
  40 // will pick it up from there and call it back. This is a bit of a hack to allow
  41 // the dialog to pass its delegate to the Web UI without having nasty accessors
  42 // on the WebContents. The correct design using RVH directly would avoid all of
  43 // this.
  44 class WEB_DIALOGS_EXPORT WebDialogUI : public content::WebUIController {
  45  public:
  46   struct WebDialogParams {
  47     // The URL for the content that will be loaded in the dialog.
  48     GURL url;
  49     // Width of the dialog.
  50     int width;
  51     // Height of the dialog.
  52     int height;
  53     // The JSON input to pass to the dialog when showing it.
  54     std::string json_input;
  55   };
  56
  57   // When created, the delegate should already be set as user data on the
  58   // WebContents.
  59   explicit WebDialogUI(content::WebUI* web_ui);
  60   ~WebDialogUI() override;
  61
  62   // Close the dialog, passing the specified arguments to the close handler.
  63   void CloseDialog(const base::ListValue* args);
  64
  65   // Sets the delegate on the WebContents.
  66   static void SetDelegate(content::WebContents* web_contents,
  67                           WebDialogDelegate* delegate);
  68
  69  private:
  70   // WebUIController
  71   void RenderViewCreated(content::RenderViewHost* render_view_host) override;
  72
  73   // Gets the delegate for the WebContent set with SetDelegate.
  74   static WebDialogDelegate* GetDelegate(content::WebContents* web_contents);
  75
  76   // JS message handler.
  77   void OnDialogClosed(const base::ListValue* args);
  78
  79   DISALLOW_COPY_AND_ASSIGN(WebDialogUI);
  80 };
  81
  82 }  // namespace ui
  83
  84 #endif  // UI_WEB_DIALOGS_WEB_DIALOG_UI_H_