Print Preview: Adding support for localized margin units and format.

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 <ctype.h>
 
 #include <string>
 #include <vector>
 
 #include "base/base64.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/i18n/file_util_icu.h"
 #include "base/json/json_reader.h"
 #include "base/memory/ref_counted.h"
 #include "base/metrics/histogram.h"
+#include "base/i18n/number_formatting.h"
 #include "base/path_service.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/platform_util.h"
 #include "chrome/browser/printing/background_printing_manager.h"
 #include "chrome/browser/printing/cloud_print/cloud_print_url.h"
 #include "chrome/browser/printing/print_dialog_cloud.h"
@@ skipping 11 matching lines @@
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/print_messages.h"
 #include "content/browser/browser_thread.h"
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/tab_contents/tab_contents.h"
 #include "printing/backend/print_backend.h"
 #include "printing/metafile.h"
 #include "printing/metafile_impl.h"
 #include "printing/page_range.h"
 #include "printing/print_settings.h"
+#include "unicode/ulocdata.h"
 
 #if !defined(OS_CHROMEOS)
 #include "base/command_line.h"
 #include "chrome/common/chrome_switches.h"
 #endif
 
 namespace {
 
 enum UserActionBuckets {
   PRINT_TO_PRINTER,
@@ skipping 191 matching lines @@
                  base::Unretained(this)));
   web_ui_->RegisterMessageCallback("cancelPendingPrintRequest",
       base::Bind(&PrintPreviewHandler::HandleCancelPendingPrintRequest,
                  base::Unretained(this)));
   web_ui_->RegisterMessageCallback("saveLastPrinter",
       base::Bind(&PrintPreviewHandler::HandleSaveLastPrinter,
                  base::Unretained(this)));
   web_ui_->RegisterMessageCallback("getInitiatorTabTitle",
       base::Bind(&PrintPreviewHandler::HandleGetInitiatorTabTitle,
                  base::Unretained(this)));
+  web_ui_->RegisterMessageCallback("getNumberFormatAndMeasurementSystem",
+      base::Bind(
+          &PrintPreviewHandler::HandleGetNumberFormatAndMeasurementSystem,
+          base::Unretained(this)));
 }
 
 TabContentsWrapper* PrintPreviewHandler::preview_tab_wrapper() const {
   return TabContentsWrapper::GetCurrentWrapperForContents(preview_tab());
 }
 TabContents* PrintPreviewHandler::preview_tab() const {
   return web_ui_->tab_contents();
 }
 
 void PrintPreviewHandler::HandleGetDefaultPrinter(const ListValue* /*args*/) {
@@ skipping 323 matching lines @@
                        manage_printers_dialog_request_count_);
 }
 
 void PrintPreviewHandler::HandleGetInitiatorTabTitle(
     const ListValue* /*args*/) {
   PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(web_ui_);
   base::StringValue tab_title(print_preview_ui->initiator_tab_title());
   web_ui_->CallJavascriptFunction("setInitiatorTabTitle", tab_title);
 }
 
+void PrintPreviewHandler::HandleGetNumberFormatAndMeasurementSystem(
+    const ListValue* /*args*/) {

[Evan Stade, 2011/10/21 01:33:02]

why is args commented out?

[Evan Stade, 2011/10/21 01:33:33]

(ignore)

+
+  // Getting the measurement system based on the locale.
+  UErrorCode errorCode = U_ZERO_ERROR;
+  const char *locale = g_browser_process->GetApplicationLocale().c_str();

[Evan Stade, 2011/10/21 01:33:02]

asterisk on left

[dpapad, 2011/10/21 16:12:48]

Done.

+  UMeasurementSystem measurement_system =
+      ulocdata_getMeasurementSystem(locale, &errorCode);
+  if (errorCode > U_ZERO_ERROR || measurement_system == UMS_LIMIT)
+    measurement_system = UMS_SI;
+
+  // Getting the number formatting based on the locale.
+  StringValue number_format(base::FormatDouble(123456.78, 2));
+  base::FundamentalValue system(measurement_system);
+
+  PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(web_ui_);

[Evan Stade, 2011/10/21 01:33:02]

what is this

[Lei Zhang, 2011/10/21 01:40:46]

Not needed, just call web_ui_->CallJavascriptFunction()

[dpapad, 2011/10/21 16:12:48]

Done. Initially I was planning to add a new method in print_preview_ui.cc and
call it from here, then this cast would be needed.

+  print_preview_ui->CallJavascriptFunction(
+      "setNumberFormatAndMeasurementSystem", number_format, system);
+}
+
 void PrintPreviewHandler::ActivateInitiatorTabAndClosePreviewTab() {
   TabContentsWrapper* initiator_tab = GetInitiatorTab();
   if (initiator_tab) {
     static_cast<RenderViewHostDelegate*>(
         initiator_tab->tab_contents())->Activate();
   }
   ClosePrintPreviewTab();
 }
 
 void PrintPreviewHandler::SendPrinterCapabilities(
@@ skipping 208 matching lines @@
     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());
 }