Print Preview: Handling pending print to pdf requests.

chrome/browser/ui/webui/print_preview_handler.cc

 // 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.
 
 #include "chrome/browser/ui/webui/print_preview_handler.h"
 
 #include <string>
 
 #include "base/base64.h"
 #if !defined(OS_CHROMEOS)
@@ skipping 611 matching lines @@
   settings->GetBoolean(printing::kSettingPrintToPDF, &print_to_pdf);
 
   settings->SetBoolean(printing::kSettingHeaderFooterEnabled, false);
 
   bool print_to_cloud = settings->HasKey(printing::kSettingCloudPrintId);
   if (print_to_cloud) {
     std::string print_ticket;
     args->GetString(1, &print_ticket);
     SendCloudPrintJob(*settings, print_ticket);
   } else if (print_to_pdf) {
+    HandlePrintToPdf(*settings);
+  } else {
+    ReportPrintSettingsStats(*settings);
+    ReportUserActionHistogram(PRINT_TO_PRINTER);
+    UMA_HISTOGRAM_COUNTS("PrintPreview.PageCount.PrintToPrinter",
+                         GetPageCountFromSettingsDictionary(*settings));
+
+    // This tries to activate the initiator tab as well, so do not clear the
+    // association with the initiator tab yet.
+    HidePreviewTab();
+
+    // Do this so the initiator tab can open a new print preview tab.
+    ClearInitiatorTabDetails();
+
+    // The PDF being printed contains only the pages that the user selected,
+    // so ignore the page range and print all pages.
+    settings->Remove(printing::kSettingPageRange, NULL);
+    RenderViewHost* rvh = web_ui_->tab_contents()->render_view_host();
+    rvh->Send(new PrintMsg_PrintForPrintPreview(rvh->routing_id(), *settings));
+  }
+}
+
+void PrintPreviewHandler::HandlePrintToPdf(
+    const base::DictionaryValue& settings) {
+  if (print_to_pdf_path_.get()) {
+    // User has already selected a path, no need to show the dialog again.
+    PostPrintToPdfTask();
+  } else if (!select_file_dialog_.get() || !select_file_dialog_->IsRunning(
+        platform_util::GetTopLevel(preview_tab()->GetNativeView()))) {
     ReportUserActionHistogram(PRINT_TO_PDF);
     UMA_HISTOGRAM_COUNTS("PrintPreview.PageCount.PrintToPDF",
-                         GetPageCountFromSettingsDictionary(*settings));
+                         GetPageCountFromSettingsDictionary(settings));
 
     // Pre-populating select file dialog with print job title.
     string16 print_job_title_utf16 =
         preview_tab_wrapper()->print_view_manager()->RenderSourceName();
 
 #if defined(OS_WIN)
     FilePath::StringType print_job_title(print_job_title_utf16);
 #elif defined(OS_POSIX)
     FilePath::StringType print_job_title = UTF16ToUTF8(print_job_title_utf16);
 #endif
 
     file_util::ReplaceIllegalCharactersInPath(&print_job_title, '_');
     FilePath default_filename(print_job_title);
     default_filename =
         default_filename.ReplaceExtension(FILE_PATH_LITERAL("pdf"));
 
     SelectFile(default_filename);
-  } else {
-    ReportPrintSettingsStats(*settings);
-    ReportUserActionHistogram(PRINT_TO_PRINTER);
-    UMA_HISTOGRAM_COUNTS("PrintPreview.PageCount.PrintToPrinter",
-                         GetPageCountFromSettingsDictionary(*settings));
-
-    // This tries to activate the initiator tab as well, so do not clear the
-    // association with the initiator tab yet.
-    HidePreviewTab();
-
-    // Do this so the initiator tab can open a new print preview tab.
-    ClearInitiatorTabDetails();
-
-    // The PDF being printed contains only the pages that the user selected,
-    // so ignore the page range and print all pages.
-    settings->Remove(printing::kSettingPageRange, NULL);
-    RenderViewHost* rvh = web_ui_->tab_contents()->render_view_host();
-    rvh->Send(new PrintMsg_PrintForPrintPreview(rvh->routing_id(), *settings));
   }
 }
 
 void PrintPreviewHandler::HandleHidePreview(const ListValue* /*args*/) {
   HidePreviewTab();
 }
 
 void PrintPreviewHandler::HandleCancelPendingPrintRequest(
     const ListValue* /*args*/) {
   TabContentsWrapper* initiator_tab = GetInitiatorTab();
@@ skipping 294 matching lines @@
   reported_failed_preview_ = true;
   ReportUserActionHistogram(PREVIEW_FAILED);
 }
 
 void PrintPreviewHandler::ShowSystemDialog() {
   HandleShowSystemDialog(NULL);
 }
 
 void PrintPreviewHandler::FileSelected(const FilePath& path,
                                        int index, void* params) {
+  // Updating last_saved_path_ to the newly selected folder.
+  *last_saved_path_ = path.DirName();
+
+  PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(web_ui_);
+  print_preview_ui->CallJavascriptFunction("fileSelectionCompleted");
+  scoped_refptr<RefCountedBytes> data;
+  print_preview_ui->GetPrintPreviewDataForIndex(
+      printing::COMPLETE_PREVIEW_DOCUMENT_INDEX, &data);
+  print_to_pdf_path_.reset(new FilePath(path));
+  if (data.get())
+    PostPrintToPdfTask();
+}
+
+void PrintPreviewHandler::PostPrintToPdfTask() {
   PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(web_ui_);
   scoped_refptr<RefCountedBytes> data;
   print_preview_ui->GetPrintPreviewDataForIndex(
       printing::COMPLETE_PREVIEW_DOCUMENT_INDEX, &data);
-  if (!data.get()) {
-    NOTREACHED();
-    return;
-  }
-
+  DCHECK(data.get());
   printing::PreviewMetafile* metafile = new printing::PreviewMetafile;
   metafile->InitFromData(static_cast<const void*>(data->front()), data->size());
-
-  // Updating last_saved_path_ to the newly selected folder.
-  *last_saved_path_ = path.DirName();
-
-  PrintToPdfTask* task = new PrintToPdfTask(metafile, path);
+  PrintToPdfTask* task = new PrintToPdfTask(metafile,
+                                            *print_to_pdf_path_);
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE, task);
-
+  print_to_pdf_path_.reset();
   ActivateInitiatorTabAndClosePreviewTab();
 }
 
 void PrintPreviewHandler::FileSelectionCanceled(void* params) {
   PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(web_ui_);
   print_preview_ui->OnFileSelectionCancelled();
 }
 
 void PrintPreviewHandler::HidePreviewTab() {
   if (GetBackgroundPrintingManager()->HasPrintPreviewTab(preview_tab_wrapper()))
     return;
   GetBackgroundPrintingManager()->OwnPrintPreviewTab(preview_tab_wrapper());
 }
 
 void PrintPreviewHandler::ClearInitiatorTabDetails() {
   TabContentsWrapper* initiator_tab = GetInitiatorTab();
   if (!initiator_tab)
     return;
 
   // We no longer require the initiator tab details. Remove those details
   // associated with the preview tab to allow the initiator tab to create
   // another preview tab.
   printing::PrintPreviewTabController* tab_controller =
       printing::PrintPreviewTabController::GetInstance();
   if (tab_controller)
     tab_controller->EraseInitiatorTabInfo(preview_tab_wrapper());
 }