Add a "Simplify Page" option to the print preview dialog

chrome/browser/ui/webui/print_preview/print_preview_handler.cc

 // 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.
 
 #include "chrome/browser/ui/webui/print_preview/print_preview_handler.h"
 
 #include <ctype.h>
 
 #include <map>
 #include <string>
@@ skipping 12 matching lines @@
 #include "base/path_service.h"
 #include "base/prefs/pref_service.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/values.h"
 #include "chrome/browser/app_mode/app_mode_utils.h"
 #include "chrome/browser/browser_process.h"
+#include "chrome/browser/dom_distiller/tab_utils.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/printing/print_dialog_cloud.h"
 #include "chrome/browser/printing/print_error_dialog.h"
 #include "chrome/browser/printing/print_job_manager.h"
 #include "chrome/browser/printing/print_preview_dialog_controller.h"
 #include "chrome/browser/printing/print_view_manager.h"
 #include "chrome/browser/printing/printer_manager_dialog.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/gaia_cookie_manager_service_factory.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_tabstrip.h"
 #include "chrome/browser/ui/chrome_select_file_policy.h"
 #include "chrome/browser/ui/scoped_tabbed_browser_displayer.h"
 #include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
 #include "chrome/browser/ui/webui/print_preview/printer_handler.h"
 #include "chrome/browser/ui/webui/print_preview/sticky_settings.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/cloud_print/cloud_print_cdd_conversion.h"
 #include "chrome/common/cloud_print/cloud_print_constants.h"
 #include "chrome/common/crash_keys.h"
 #include "chrome/common/pref_names.h"
 #include "components/cloud_devices/common/cloud_device_description.h"
 #include "components/cloud_devices/common/cloud_devices_urls.h"
 #include "components/cloud_devices/common/printer_description.h"
+#include "components/dom_distiller/core/url_utils.h"
 #include "components/printing/common/print_messages.h"
 #include "components/signin/core/browser/gaia_cookie_manager_service.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/common/profile_management_switches.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_controller.h"
 #include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/render_process_host.h"
@@ skipping 88 matching lines @@
 // Dictionary field to indicate whether Chrome is running in forced app (app
 // kiosk) mode. It's not the same as desktop Chrome kiosk (the one above).
 const char kAppKioskMode[] = "appKioskMode";
 // Dictionary field to store Cloud Print base URL.
 const char kCloudPrintUrl[] = "cloudPrintUrl";
 #if defined(OS_WIN)
 const char kHidePrintWithSystemDialogLink[] = "hidePrintWithSystemDialogLink";
 #endif
 // Name of a dictionary field holding the state of selection for document.
 const char kDocumentHasSelection[] = "documentHasSelection";
+// Dictionary field indicating whether to simplify the page.
+const char kPrintFriendlyEnabled[] = "printFriendlyEnabled";
 
 // Id of the predefined PDF printer.
 const char kLocalPdfPrinterId[] = "Save as PDF";
 
 // Additional printer capability setting keys.
 const char kPrinterId[] = "printerId";
 const char kPrinterCapabilities[] = "capabilities";
 
 // Get the print job settings dictionary from |args|. The caller takes
 // ownership of the returned DictionaryValue. Returns NULL on failure.
@@ skipping 638 matching lines @@
     success = args->GetBoolean(2, &preview_modifiable);
     DCHECK(success);
 
     if (draft_page_count != -1 && preview_modifiable &&
         print_preview_ui()->GetAvailableDraftPageCount() != draft_page_count) {
       settings->SetBoolean(printing::kSettingGenerateDraftData, true);
     }
   }
 
   VLOG(1) << "Print preview request start";
-  RenderViewHost* rvh = initiator->GetRenderViewHost();
-  rvh->Send(new PrintMsg_PrintPreview(rvh->GetRoutingID(), *settings));
+
+  bool print_friendly = false;
+  if (!settings->GetBoolean(printing::kSettingPrintFriendlyEnabled,
+                            &print_friendly)) {
+    NOTREACHED();
+  }
+
+  if (print_friendly) {
+    if (!hidden_print_preview_)
+      MaybeStartDistillation(initiator);
+
+      hidden_print_preview_.reset(
+        new HiddenPrintPreview(initiator, print_preview_ui()));
+      hidden_print_preview_->SetSettings(settings.Pass());
+  } else {
+    RenderViewHost* rvh = initiator->GetRenderViewHost();
+    rvh->Send(new PrintMsg_PrintPreview(rvh->GetRoutingID(), *settings));
+  }
 }
 
 void PrintPreviewHandler::HandlePrint(const base::ListValue* args) {
   ReportStats();
 
   // Record the number of times the user requests to regenerate preview data
   // before printing.
   UMA_HISTOGRAM_COUNTS("PrintPreview.RegeneratePreviewRequest.BeforePrint",
                        regenerate_preview_request_count_);
 
@@ skipping 392 matching lines @@
   initial_settings.SetBoolean(kAppKioskMode,
                               chrome::IsRunningInForcedAppMode());
 #if defined(OS_WIN)
   // In Win8 metro, the system print dialog can only open on the desktop.  Doing
   // so will cause the browser to appear hung, so we don't show the link in
   // metro.
   bool is_ash = (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_ASH);
   initial_settings.SetBoolean(kHidePrintWithSystemDialogLink, is_ash);
 #endif
 
+  WebContents* initiator = GetInitiator();
+  bool can_simplify = false;
+  if (initiator) {
+      can_simplify = cmdline->HasSwitch(switches::kEnableDomDistiller) &&
+         dom_distiller::url_utils::IsUrlDistillable(
+            initiator->GetLastCommittedURL());
+    }
+  initial_settings.SetBoolean(kPrintFriendlyEnabled, can_simplify);
+
   if (print_preview_ui()->source_is_modifiable())
     GetNumberFormatAndMeasurementSystem(&initial_settings);
   web_ui()->CallJavascriptFunction("setInitialSettings", initial_settings);
 }
 
 void PrintPreviewHandler::ClosePreviewDialog() {
   print_preview_ui()->OnClosePrintPreviewDialog();
 }
 
 void PrintPreviewHandler::SendAccessToken(const std::string& type,
@@ skipping 486 matching lines @@
 
 void PrintPreviewHandler::UnregisterForGaiaCookieChanges() {
   if (gaia_cookie_manager_service_)
     gaia_cookie_manager_service_->RemoveObserver(this);
 }
 
 void PrintPreviewHandler::SetPdfSavedClosureForTesting(
     const base::Closure& closure) {
   pdf_file_saved_closure_ = closure;
 }