Implement print preview tab controller.

chrome/browser/renderer_host/render_view_host.cc

 // Copyright (c) 2010 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.
 
 #include "chrome/browser/renderer_host/render_view_host.h"
 
 #include <string>
 #include <utility>
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/i18n/rtl.h"
 #include "base/json/json_reader.h"
 #include "base/metrics/stats_counters.h"
 #include "base/string_util.h"
 #include "base/time.h"
 #include "base/values.h"
 #include "chrome/browser/blocked_plugin_manager.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/child_process_security_policy.h"
 #include "chrome/browser/cross_site_request_manager.h"
 #include "chrome/browser/debugger/devtools_manager.h"
 #include "chrome/browser/dom_operation_notification_details.h"
 #include "chrome/browser/extensions/extension_message_service.h"
 #include "chrome/browser/in_process_webkit/session_storage_namespace.h"
 #include "chrome/browser/net/predictor_api.h"
 #include "chrome/browser/notifications/desktop_notification_service.h"
+#include "chrome/browser/printing/print_preview_tab_controller.h"
 #include "chrome/browser/profile.h"
 #include "chrome/browser/renderer_host/render_process_host.h"
 #include "chrome/browser/renderer_host/render_view_host_delegate.h"
 #include "chrome/browser/renderer_host/render_widget_host.h"
 #include "chrome/browser/renderer_host/render_widget_host_view.h"
 #include "chrome/browser/renderer_host/site_instance.h"
 #include "chrome/common/bindings_policy.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/native_web_keyboard_event.h"
@@ skipping 2190 matching lines @@
     view->ShowPopupMenu(params.bounds,
                         params.item_height,
                         params.item_font_size,
                         params.selected_item,
                         params.popup_items,
                         params.right_aligned);
   }
 }
 #endif
 
+TabContents* RenderViewHost::GetPrintPreviewTab() {
+  // current_tab is initiator_tab
+  TabContents* current_tab = delegate_? delegate_->GetAsTabContents() : NULL;
+  if (current_tab != NULL) {
+    // Get/Create preview tab for initiator tab.
+    printing::PrintPreviewTabController* tab_controller =

[Lei Zhang, 2010/11/12 02:10:55]

What happens when GetInstance() returns NULL?

[kmadhusu, 2010/11/12 22:21:48]

Made code change to check the return value.

+        printing::PrintPreviewTabController::GetInstance();
+    return tab_controller->get_print_preview_tab(
+        current_tab, delegate_->GetBrowserWindowID());
+  }
+  return NULL;
+}
+
 #if defined(OS_MACOSX) || defined(OS_WIN)
 void RenderViewHost::OnPageReadyForPreview(
     const ViewHostMsg_DidPrintPage_Params& params) {
+  // Get the print preview tab.
+  TabContents* preview_tab = GetPrintPreviewTab();
+  DCHECK(preview_tab != NULL);
+
   // TODO(kmadhusu): Function definition needs to be changed.
   // 'params' contains the metafile handle for preview.
 
   // Send the printingDone msg for now.
   Send(new ViewMsg_PrintingDone(routing_id(), -1, true));
 }
 #else
 void RenderViewHost::OnPagesReadyForPreview(int fd_in_browser) {
+  // Get the print preview tab.
+  TabContents* preview_tab = GetPrintPreviewTab();
+  DCHECK(preview_tab != NULL);
+
   // TODO(kmadhusu): Function definition needs to be changed.
   // fd_in_browser should be the file descriptor of the metafile.
 
   // Send the printingDone msg for now.
   Send(new ViewMsg_PrintingDone(routing_id(), -1, true));
 }
 #endif