Print Preview: Make print preview tab modal. (try 2)

chrome/browser/ui/webui/print_preview_ui.h

 // Copyright (c) 2011 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_UI_WEBUI_PRINT_PREVIEW_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_UI_H_
 #pragma once
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/time.h"
 #include "chrome/browser/printing/print_preview_data_service.h"
-#include "chrome/browser/ui/webui/chrome_web_ui.h"
+#include "chrome/browser/ui/webui/constrained_html_ui.h"
 
 class PrintPreviewDataService;
 class PrintPreviewHandler;
 struct PrintHostMsg_DidGetPreviewPageCount_Params;
 
 namespace printing {
 struct PageSizeMargins;
 }
 
-class PrintPreviewUI : public ChromeWebUI {
+class PrintPreviewUI : public ConstrainedHtmlUI {
  public:
   explicit PrintPreviewUI(TabContents* contents);
   virtual ~PrintPreviewUI();
 
   // Gets the print preview |data|. |index| is zero-based, and can be
   // |printing::COMPLETE_PREVIEW_DOCUMENT_INDEX| to get the entire preview
   // document.
   void GetPrintPreviewDataForIndex(int index,
                                    scoped_refptr<RefCountedBytes>* data);
 
@@ skipping 57 matching lines @@
   // |preview_request_id| indicates which request resulted in this response.
   void OnReusePreviewData(int preview_request_id);
 
   // Notifies the Web UI that preview tab is destroyed. This is the last chance
   // to communicate with the source tab before the association is erased.
   void OnTabDestroyed();
 
   // Notifies the Web UI that the print preview failed to render.
   void OnPrintPreviewFailed();
 
+  // Notified the Web UI that this print preview tab's RenderProcess has been
+  // closed, which may occur for several reasons, e.g. tab closure or crash.
+  void OnPrintPreviewTabClosed();
+
   // Notifies the Web UI that initiator tab is closed, so we can disable all the
   // controls that need the initiator tab for generating the preview data.
   void OnInitiatorTabClosed();
 
-  // Notifies the Web UI that the initiator tab has crashed.
-  void OnInitiatorTabCrashed();
-
   // Notifies the Web UI renderer that file selection has been cancelled.
   void OnFileSelectionCancelled();
 
   // Notifies the Web UI that the printer is unavailable or its settings are
   // invalid.
   void OnInvalidPrinterSettings();
 
   // Notifies the Web UI to cancel the pending preview request.
   void OnCancelPendingPreviewRequest();
 
+  // Hides the print preview tab.
+  void OnHidePreviewTab();
+
+  // Closes the print preview tab.
+  void OnClosePrintPreviewTab();
+
+  // Reload the printers list.
+  void OnReloadPrintersList();
+
  private:
   friend class PrintPreviewHandlerTest;
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, StickyMarginsCustom);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest, StickyMarginsDefault);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
                            StickyMarginsCustomThenDefault);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
                            GetLastUsedMarginSettingsCustom);
   FRIEND_TEST_ALL_PREFIXES(PrintPreviewHandlerTest,
                            GetLastUsedMarginSettingsDefault);
@@ skipping 15 matching lines @@
   // when the initiator tab is closed/crashed.
   std::string initiator_url_;
 
   // Indicates whether the source document can be modified.
   bool source_is_modifiable_;
 
   // Store the initiator tab title, used for populating the print preview tab
   // title.
   string16 initiator_tab_title_;
 
+  // Keeps track of whether OnClosePrintPreviewTab() has been called or not.
+  bool tab_closed_;
+
   DISALLOW_COPY_AND_ASSIGN(PrintPreviewUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_PRINT_PREVIEW_UI_H_