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

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
   6
   7 #include <map>
   8 #include <vector>
   9
  10 #include "base/id_map.h"
  11 #include "base/lazy_instance.h"
  12 #include "base/memory/ref_counted_memory.h"
  13 #include "base/metrics/histogram.h"
  14 #include "base/strings/string_number_conversions.h"
  15 #include "base/strings/string_split.h"
  16 #include "base/strings/string_util.h"
  17 #include "base/strings/utf_string_conversions.h"
  18 #include "base/synchronization/lock.h"
  19 #include "base/values.h"
  20 #include "chrome/browser/browser_process.h"
  21 #include "chrome/browser/printing/background_printing_manager.h"
  22 #include "chrome/browser/printing/print_preview_data_service.h"
  23 #include "chrome/browser/profiles/profile.h"
  24 #include "chrome/browser/ui/webui/metrics_handler.h"
  25 #include "chrome/browser/ui/webui/print_preview/print_preview_handler.h"
  26 #include "chrome/browser/ui/webui/theme_source.h"
  27 #include "chrome/common/url_constants.h"
  28 #include "chrome/grit/chromium_strings.h"
  29 #include "chrome/grit/generated_resources.h"
  30 #include "components/printing/common/print_messages.h"
  31 #include "content/public/browser/url_data_source.h"
  32 #include "content/public/browser/web_contents.h"
  33 #include "content/public/browser/web_ui_data_source.h"
  34 #include "grit/browser_resources.h"
  35 #include "grit/components_strings.h"
  36 #include "printing/page_size_margins.h"
  37 #include "printing/print_job_constants.h"
  38 #include "ui/base/l10n/l10n_util.h"
  39 #include "ui/gfx/geometry/rect.h"
  40 #include "ui/web_dialogs/web_dialog_delegate.h"
  41 #include "ui/web_dialogs/web_dialog_ui.h"
  42
  43 using content::WebContents;
  44 using printing::PageSizeMargins;
  45
  46 namespace {
  47
  48 #if defined(OS_MACOSX)
  49 // U+0028 U+21E7 U+2318 U+0050 U+0029 in UTF8
  50 const char kBasicPrintShortcut[] = "\x28\xE2\x8c\xA5\xE2\x8C\x98\x50\x29";
  51 #elif defined(OS_WIN) || defined(OS_CHROMEOS)
  52 const char kBasicPrintShortcut[] = "(Ctrl+Shift+P)";
  53 #else
  54 const char kBasicPrintShortcut[] = "(Shift+Ctrl+P)";
  55 #endif
  56
  57 // Thread-safe wrapper around a std::map to keep track of mappings from
  58 // PrintPreviewUI IDs to most recent print preview request IDs.
  59 class PrintPreviewRequestIdMapWithLock {
  60  public:
  61   PrintPreviewRequestIdMapWithLock() {}
  62   ~PrintPreviewRequestIdMapWithLock() {}
  63
  64   // Gets the value for |preview_id|.
  65   // Returns true and sets |out_value| on success.
  66   bool Get(int32 preview_id, int* out_value) {
  67     base::AutoLock lock(lock_);
  68     PrintPreviewRequestIdMap::const_iterator it = map_.find(preview_id);
  69     if (it == map_.end())
  70       return false;
  71     *out_value = it->second;
  72     return true;
  73   }
  74
  75   // Sets the |value| for |preview_id|.
  76   void Set(int32 preview_id, int value) {
  77     base::AutoLock lock(lock_);
  78     map_[preview_id] = value;
  79   }
  80
  81   // Erases the entry for |preview_id|.
  82   void Erase(int32 preview_id) {
  83     base::AutoLock lock(lock_);
  84     map_.erase(preview_id);
  85   }
  86
  87  private:
  88   // Mapping from PrintPreviewUI ID to print preview request ID.
  89   typedef std::map<int, int> PrintPreviewRequestIdMap;
  90
  91   PrintPreviewRequestIdMap map_;
  92   base::Lock lock_;
  93
  94   DISALLOW_COPY_AND_ASSIGN(PrintPreviewRequestIdMapWithLock);
  95 };
  96
  97 // Written to on the UI thread, read from any thread.
  98 base::LazyInstance<PrintPreviewRequestIdMapWithLock>
  99     g_print_preview_request_id_map = LAZY_INSTANCE_INITIALIZER;
 100
 101 // PrintPreviewUI IDMap used to avoid exposing raw pointer addresses to WebUI.
 102 // Only accessed on the UI thread.
 103 base::LazyInstance<IDMap<PrintPreviewUI> >
 104     g_print_preview_ui_id_map = LAZY_INSTANCE_INITIALIZER;
 105
 106 // PrintPreviewUI serves data for chrome://print requests.
 107 //
 108 // The format for requesting PDF data is as follows:
 109 // chrome://print/<PrintPreviewUIID>/<PageIndex>/print.pdf
 110 //
 111 // Parameters (< > required):
 112 //    <PrintPreviewUIID> = PrintPreview UI ID
 113 //    <PageIndex> = Page index is zero-based or
 114 //                  |printing::COMPLETE_PREVIEW_DOCUMENT_INDEX| to represent
 115 //                  a print ready PDF.
 116 //
 117 // Example:
 118 //    chrome://print/123/10/print.pdf
 119 //
 120 // Requests to chrome://print with paths not ending in /print.pdf are used
 121 // to return the markup or other resources for the print preview page itself.
 122 bool HandleRequestCallback(
 123     const std::string& path,
 124     const content::WebUIDataSource::GotDataCallback& callback) {
 125   // ChromeWebUIDataSource handles most requests except for the print preview
 126   // data.
 127   if (!EndsWith(path, "/print.pdf", true))
 128     return false;
 129
 130   // Print Preview data.
 131   scoped_refptr<base::RefCountedBytes> data;
 132   std::vector<std::string> url_substr;
 133   base::SplitString(path, '/', &url_substr);
 134   int preview_ui_id = -1;
 135   int page_index = 0;
 136   if (url_substr.size() == 3 &&
 137       base::StringToInt(url_substr[0], &preview_ui_id),
 138       base::StringToInt(url_substr[1], &page_index) &&
 139       preview_ui_id >= 0) {
 140     PrintPreviewDataService::GetInstance()->GetDataEntry(
 141         preview_ui_id, page_index, &data);
 142   }
 143   if (data.get()) {
 144     callback.Run(data.get());
 145     return true;
 146   }
 147   // Invalid request.
 148   scoped_refptr<base::RefCountedBytes> empty_bytes(new base::RefCountedBytes);
 149   callback.Run(empty_bytes.get());
 150   return true;
 151 }
 152
 153 content::WebUIDataSource* CreatePrintPreviewUISource() {
 154   content::WebUIDataSource* source =
 155       content::WebUIDataSource::Create(chrome::kChromeUIPrintHost);
 156 #if defined(OS_CHROMEOS)
 157   source->AddLocalizedString("title",
 158                              IDS_PRINT_PREVIEW_GOOGLE_CLOUD_PRINT_TITLE);
 159 #else
 160   source->AddLocalizedString("title", IDS_PRINT_PREVIEW_TITLE);
 161 #endif
 162   source->AddLocalizedString("loading", IDS_PRINT_PREVIEW_LOADING);
 163   source->AddLocalizedString("noPlugin", IDS_PRINT_PREVIEW_NO_PLUGIN);
 164   source->AddLocalizedString("launchNativeDialog",
 165                              IDS_PRINT_PREVIEW_NATIVE_DIALOG);
 166   source->AddLocalizedString("previewFailed", IDS_PRINT_PREVIEW_FAILED);
 167   source->AddLocalizedString("invalidPrinterSettings",
 168                              IDS_PRINT_INVALID_PRINTER_SETTINGS);
 169   source->AddLocalizedString("printButton", IDS_PRINT_PREVIEW_PRINT_BUTTON);
 170   source->AddLocalizedString("saveButton", IDS_PRINT_PREVIEW_SAVE_BUTTON);
 171   source->AddLocalizedString("printing", IDS_PRINT_PREVIEW_PRINTING);
 172   source->AddLocalizedString("printingToPDFInProgress",
 173                              IDS_PRINT_PREVIEW_PRINTING_TO_PDF_IN_PROGRESS);
 174 #if defined(OS_MACOSX)
 175   source->AddLocalizedString("openingPDFInPreview",
 176                              IDS_PRINT_PREVIEW_OPENING_PDF_IN_PREVIEW);
 177 #endif
 178   source->AddLocalizedString("destinationLabel",
 179                              IDS_PRINT_PREVIEW_DESTINATION_LABEL);
 180   source->AddLocalizedString("copiesLabel", IDS_PRINT_PREVIEW_COPIES_LABEL);
 181   source->AddLocalizedString("examplePageRangeText",
 182                              IDS_PRINT_PREVIEW_EXAMPLE_PAGE_RANGE_TEXT);
 183   source->AddLocalizedString("layoutLabel", IDS_PRINT_PREVIEW_LAYOUT_LABEL);
 184   source->AddLocalizedString("optionAllPages",
 185                              IDS_PRINT_PREVIEW_OPTION_ALL_PAGES);
 186   source->AddLocalizedString("optionBw", IDS_PRINT_PREVIEW_OPTION_BW);
 187   source->AddLocalizedString("optionCollate", IDS_PRINT_PREVIEW_OPTION_COLLATE);
 188   source->AddLocalizedString("optionColor", IDS_PRINT_PREVIEW_OPTION_COLOR);
 189   source->AddLocalizedString("optionLandscape",
 190                              IDS_PRINT_PREVIEW_OPTION_LANDSCAPE);
 191   source->AddLocalizedString("optionPortrait",
 192                              IDS_PRINT_PREVIEW_OPTION_PORTRAIT);
 193   source->AddLocalizedString("optionTwoSided",
 194                              IDS_PRINT_PREVIEW_OPTION_TWO_SIDED);
 195   source->AddLocalizedString("pagesLabel", IDS_PRINT_PREVIEW_PAGES_LABEL);
 196   source->AddLocalizedString("pageRangeTextBox",
 197                              IDS_PRINT_PREVIEW_PAGE_RANGE_TEXT);
 198   source->AddLocalizedString("pageRangeRadio",
 199                              IDS_PRINT_PREVIEW_PAGE_RANGE_RADIO);
 200   source->AddLocalizedString("printToPDF", IDS_PRINT_PREVIEW_PRINT_TO_PDF);
 201   source->AddLocalizedString("printPreviewSummaryFormatShort",
 202                              IDS_PRINT_PREVIEW_SUMMARY_FORMAT_SHORT);
 203   source->AddLocalizedString("printPreviewSummaryFormatLong",
 204                              IDS_PRINT_PREVIEW_SUMMARY_FORMAT_LONG);
 205   source->AddLocalizedString("printPreviewSheetsLabelSingular",
 206                              IDS_PRINT_PREVIEW_SHEETS_LABEL_SINGULAR);
 207   source->AddLocalizedString("printPreviewSheetsLabelPlural",
 208                              IDS_PRINT_PREVIEW_SHEETS_LABEL_PLURAL);
 209   source->AddLocalizedString("printPreviewPageLabelSingular",
 210                              IDS_PRINT_PREVIEW_PAGE_LABEL_SINGULAR);
 211   source->AddLocalizedString("printPreviewPageLabelPlural",
 212                              IDS_PRINT_PREVIEW_PAGE_LABEL_PLURAL);
 213   const base::string16 shortcut_text(base::UTF8ToUTF16(kBasicPrintShortcut));
 214 #if !defined(OS_CHROMEOS)
 215   source->AddString(
 216       "systemDialogOption",
 217       l10n_util::GetStringFUTF16(
 218           IDS_PRINT_PREVIEW_SYSTEM_DIALOG_OPTION,
 219           shortcut_text));
 220 #endif
 221 #if defined(OS_MACOSX)
 222   source->AddLocalizedString("openPdfInPreviewOption",
 223                              IDS_PRINT_PREVIEW_OPEN_PDF_IN_PREVIEW_APP);
 224 #endif
 225   source->AddString(
 226       "printWithCloudPrintWait",
 227       l10n_util::GetStringFUTF16(
 228           IDS_PRINT_PREVIEW_PRINT_WITH_CLOUD_PRINT_WAIT,
 229           l10n_util::GetStringUTF16(IDS_GOOGLE_CLOUD_PRINT)));
 230   source->AddString(
 231       "noDestsPromoLearnMoreUrl",
 232       chrome::kCloudPrintNoDestinationsLearnMoreURL);
 233   source->AddLocalizedString("pageRangeInstruction",
 234                              IDS_PRINT_PREVIEW_PAGE_RANGE_INSTRUCTION);
 235   source->AddLocalizedString("copiesInstruction",
 236                              IDS_PRINT_PREVIEW_COPIES_INSTRUCTION);
 237   source->AddLocalizedString("incrementTitle",
 238                              IDS_PRINT_PREVIEW_INCREMENT_TITLE);
 239   source->AddLocalizedString("decrementTitle",
 240                              IDS_PRINT_PREVIEW_DECREMENT_TITLE);
 241   source->AddLocalizedString("printPagesLabel",
 242                              IDS_PRINT_PREVIEW_PRINT_PAGES_LABEL);
 243   source->AddLocalizedString("optionsLabel", IDS_PRINT_PREVIEW_OPTIONS_LABEL);
 244   source->AddLocalizedString("optionHeaderFooter",
 245                              IDS_PRINT_PREVIEW_OPTION_HEADER_FOOTER);
 246   source->AddLocalizedString("optionFitToPage",
 247                              IDS_PRINT_PREVIEW_OPTION_FIT_TO_PAGE);
 248   source->AddLocalizedString(
 249       "optionBackgroundColorsAndImages",
 250       IDS_PRINT_PREVIEW_OPTION_BACKGROUND_COLORS_AND_IMAGES);
 251   source->AddLocalizedString("optionSelectionOnly",
 252                              IDS_PRINT_PREVIEW_OPTION_SELECTION_ONLY);
 253   source->AddLocalizedString("marginsLabel", IDS_PRINT_PREVIEW_MARGINS_LABEL);
 254   source->AddLocalizedString("defaultMargins",
 255                              IDS_PRINT_PREVIEW_DEFAULT_MARGINS);
 256   source->AddLocalizedString("noMargins", IDS_PRINT_PREVIEW_NO_MARGINS);
 257   source->AddLocalizedString("customMargins", IDS_PRINT_PREVIEW_CUSTOM_MARGINS);
 258   source->AddLocalizedString("minimumMargins",
 259                              IDS_PRINT_PREVIEW_MINIMUM_MARGINS);
 260   source->AddLocalizedString("top", IDS_PRINT_PREVIEW_TOP_MARGIN_LABEL);
 261   source->AddLocalizedString("bottom", IDS_PRINT_PREVIEW_BOTTOM_MARGIN_LABEL);
 262   source->AddLocalizedString("left", IDS_PRINT_PREVIEW_LEFT_MARGIN_LABEL);
 263   source->AddLocalizedString("right", IDS_PRINT_PREVIEW_RIGHT_MARGIN_LABEL);
 264   source->AddLocalizedString("mediaSizeLabel",
 265                              IDS_PRINT_PREVIEW_MEDIA_SIZE_LABEL);
 266   source->AddLocalizedString("dpiLabel", IDS_PRINT_PREVIEW_DPI_LABEL);
 267   source->AddLocalizedString("dpiItemLabel", IDS_PRINT_PREVIEW_DPI_ITEM_LABEL);
 268   source->AddLocalizedString("nonIsotropicDpiItemLabel",
 269                              IDS_PRINT_PREVIEW_NON_ISOTROPIC_DPI_ITEM_LABEL);
 270   source->AddLocalizedString("destinationSearchTitle",
 271                              IDS_PRINT_PREVIEW_DESTINATION_SEARCH_TITLE);
 272   source->AddLocalizedString("accountSelectTitle",
 273                              IDS_PRINT_PREVIEW_ACCOUNT_SELECT_TITLE);
 274   source->AddLocalizedString("addAccountTitle",
 275                              IDS_PRINT_PREVIEW_ADD_ACCOUNT_TITLE);
 276   source->AddLocalizedString("cloudPrintPromotion",
 277                              IDS_PRINT_PREVIEW_CLOUD_PRINT_PROMOTION);
 278   source->AddLocalizedString("searchBoxPlaceholder",
 279                              IDS_PRINT_PREVIEW_SEARCH_BOX_PLACEHOLDER);
 280   source->AddLocalizedString("noDestinationsMessage",
 281                              IDS_PRINT_PREVIEW_NO_DESTINATIONS_MESSAGE);
 282   source->AddLocalizedString("showAllButtonText",
 283                              IDS_PRINT_PREVIEW_SHOW_ALL_BUTTON_TEXT);
 284   source->AddLocalizedString("destinationCount",
 285                              IDS_PRINT_PREVIEW_DESTINATION_COUNT);
 286   source->AddLocalizedString("recentDestinationsTitle",
 287                              IDS_PRINT_PREVIEW_RECENT_DESTINATIONS_TITLE);
 288   source->AddLocalizedString("localDestinationsTitle",
 289                              IDS_PRINT_PREVIEW_LOCAL_DESTINATIONS_TITLE);
 290   source->AddLocalizedString("cloudDestinationsTitle",
 291                              IDS_PRINT_PREVIEW_CLOUD_DESTINATIONS_TITLE);
 292   source->AddLocalizedString("manage", IDS_PRINT_PREVIEW_MANAGE);
 293   source->AddLocalizedString("setupCloudPrinters",
 294                              IDS_PRINT_PREVIEW_SETUP_CLOUD_PRINTERS);
 295   source->AddLocalizedString("changeDestination",
 296                              IDS_PRINT_PREVIEW_CHANGE_DESTINATION);
 297   source->AddLocalizedString("offlineForYear",
 298                              IDS_PRINT_PREVIEW_OFFLINE_FOR_YEAR);
 299   source->AddLocalizedString("offlineForMonth",
 300                              IDS_PRINT_PREVIEW_OFFLINE_FOR_MONTH);
 301   source->AddLocalizedString("offlineForWeek",
 302                              IDS_PRINT_PREVIEW_OFFLINE_FOR_WEEK);
 303   source->AddLocalizedString("offline", IDS_PRINT_PREVIEW_OFFLINE);
 304   source->AddLocalizedString("fedexTos", IDS_PRINT_PREVIEW_FEDEX_TOS);
 305   source->AddLocalizedString("tosCheckboxLabel",
 306                              IDS_PRINT_PREVIEW_TOS_CHECKBOX_LABEL);
 307   source->AddLocalizedString("noDestsPromoTitle",
 308                              IDS_PRINT_PREVIEW_NO_DESTS_PROMO_TITLE);
 309   source->AddLocalizedString("noDestsPromoBody",
 310                              IDS_PRINT_PREVIEW_NO_DESTS_PROMO_BODY);
 311   source->AddLocalizedString("noDestsPromoGcpDesc",
 312                              IDS_PRINT_PREVIEW_NO_DESTS_GCP_DESC);
 313   source->AddLocalizedString("learnMore",
 314                              IDS_LEARN_MORE);
 315   source->AddLocalizedString(
 316       "noDestsPromoAddPrinterButtonLabel",
 317       IDS_PRINT_PREVIEW_NO_DESTS_PROMO_ADD_PRINTER_BUTTON_LABEL);
 318   source->AddLocalizedString(
 319       "noDestsPromoNotNowButtonLabel",
 320       IDS_PRINT_PREVIEW_NO_DESTS_PROMO_NOT_NOW_BUTTON_LABEL);
 321   source->AddLocalizedString("couldNotPrint",
 322                              IDS_PRINT_PREVIEW_COULD_NOT_PRINT);
 323   source->AddLocalizedString("registerPromoButtonText",
 324                              IDS_PRINT_PREVIEW_REGISTER_PROMO_BUTTON_TEXT);
 325   source->AddLocalizedString(
 326       "extensionDestinationIconTooltip",
 327       IDS_PRINT_PREVIEW_EXTENSION_DESTINATION_ICON_TOOLTIP);
 328   source->AddLocalizedString(
 329       "advancedSettingsSearchBoxPlaceholder",
 330       IDS_PRINT_PREVIEW_ADVANCED_SETTINGS_SEARCH_BOX_PLACEHOLDER);
 331   source->AddLocalizedString("advancedSettingsDialogTitle",
 332                              IDS_PRINT_PREVIEW_ADVANCED_SETTINGS_DIALOG_TITLE);
 333   source->AddLocalizedString(
 334       "noAdvancedSettingsMatchSearchHint",
 335       IDS_PRINT_PREVIEW_NO_ADVANCED_SETTINGS_MATCH_SEARCH_HINT);
 336   source->AddLocalizedString(
 337       "advancedSettingsDialogConfirm",
 338       IDS_PRINT_PREVIEW_ADVANCED_SETTINGS_DIALOG_CONFIRM);
 339   source->AddLocalizedString("cancel", IDS_CANCEL);
 340   source->AddLocalizedString("advancedOptionsLabel",
 341                              IDS_PRINT_PREVIEW_ADVANCED_OPTIONS_LABEL);
 342   source->AddLocalizedString("showAdvancedOptions",
 343                              IDS_PRINT_PREVIEW_SHOW_ADVANCED_OPTIONS);
 344
 345   source->AddLocalizedString("accept", IDS_PRINT_PREVIEW_ACCEPT_INVITE);
 346   source->AddLocalizedString(
 347       "acceptForGroup", IDS_PRINT_PREVIEW_ACCEPT_GROUP_INVITE);
 348   source->AddLocalizedString("reject", IDS_PRINT_PREVIEW_REJECT_INVITE);
 349   source->AddLocalizedString(
 350       "groupPrinterSharingInviteText", IDS_PRINT_PREVIEW_GROUP_INVITE_TEXT);
 351   source->AddLocalizedString(
 352       "printerSharingInviteText", IDS_PRINT_PREVIEW_INVITE_TEXT);
 353
 354   source->SetJsonPath("strings.js");
 355   source->AddResourcePath("print_preview.js", IDR_PRINT_PREVIEW_JS);
 356   source->AddResourcePath("images/printer.png",
 357                           IDR_PRINT_PREVIEW_IMAGES_PRINTER);
 358   source->AddResourcePath("images/printer_shared.png",
 359                           IDR_PRINT_PREVIEW_IMAGES_PRINTER_SHARED);
 360   source->AddResourcePath("images/third_party.png",
 361                           IDR_PRINT_PREVIEW_IMAGES_THIRD_PARTY);
 362   source->AddResourcePath("images/third_party_fedex.png",
 363                           IDR_PRINT_PREVIEW_IMAGES_THIRD_PARTY_FEDEX);
 364   source->AddResourcePath("images/google_doc.png",
 365                           IDR_PRINT_PREVIEW_IMAGES_GOOGLE_DOC);
 366   source->AddResourcePath("images/pdf.png", IDR_PRINT_PREVIEW_IMAGES_PDF);
 367   source->AddResourcePath("images/mobile.png", IDR_PRINT_PREVIEW_IMAGES_MOBILE);
 368   source->AddResourcePath("images/mobile_shared.png",
 369                           IDR_PRINT_PREVIEW_IMAGES_MOBILE_SHARED);
 370   source->SetDefaultResource(IDR_PRINT_PREVIEW_HTML);
 371   source->SetRequestFilter(base::Bind(&HandleRequestCallback));
 372   source->OverrideContentSecurityPolicyObjectSrc("object-src 'self';");
 373   source->AddLocalizedString("moreOptionsLabel", IDS_MORE_OPTIONS_LABEL);
 374   source->AddLocalizedString("lessOptionsLabel", IDS_LESS_OPTIONS_LABEL);
 375   return source;
 376 }
 377
 378 PrintPreviewUI::TestingDelegate* g_testing_delegate = NULL;
 379
 380 }  // namespace
 381
 382 PrintPreviewUI::PrintPreviewUI(content::WebUI* web_ui)
 383     : ConstrainedWebDialogUI(web_ui),
 384       initial_preview_start_time_(base::TimeTicks::Now()),
 385       id_(g_print_preview_ui_id_map.Get().Add(this)),
 386       handler_(NULL),
 387       source_is_modifiable_(true),
 388       source_has_selection_(false),
 389       dialog_closed_(false) {
 390   // Set up the chrome://print/ data source.
 391   Profile* profile = Profile::FromWebUI(web_ui);
 392   content::WebUIDataSource::Add(profile, CreatePrintPreviewUISource());
 393
 394   // Set up the chrome://theme/ source.
 395   content::URLDataSource::Add(profile, new ThemeSource(profile));
 396
 397   // WebUI owns |handler_|.
 398   handler_ = new PrintPreviewHandler();
 399   web_ui->AddMessageHandler(handler_);
 400
 401   web_ui->AddMessageHandler(new MetricsHandler());
 402
 403   g_print_preview_request_id_map.Get().Set(id_, -1);
 404 }
 405
 406 PrintPreviewUI::~PrintPreviewUI() {
 407   print_preview_data_service()->RemoveEntry(id_);
 408   g_print_preview_request_id_map.Get().Erase(id_);
 409   g_print_preview_ui_id_map.Get().Remove(id_);
 410 }
 411
 412 void PrintPreviewUI::GetPrintPreviewDataForIndex(
 413     int index,
 414     scoped_refptr<base::RefCountedBytes>* data) {
 415   print_preview_data_service()->GetDataEntry(id_, index, data);
 416 }
 417
 418 void PrintPreviewUI::SetPrintPreviewDataForIndex(
 419     int index,
 420     const base::RefCountedBytes* data) {
 421   print_preview_data_service()->SetDataEntry(id_, index, data);
 422 }
 423
 424 void PrintPreviewUI::ClearAllPreviewData() {
 425   print_preview_data_service()->RemoveEntry(id_);
 426 }
 427
 428 int PrintPreviewUI::GetAvailableDraftPageCount() {
 429   return print_preview_data_service()->GetAvailableDraftPageCount(id_);
 430 }
 431
 432 void PrintPreviewUI::SetInitiatorTitle(
 433     const base::string16& job_title) {
 434   initiator_title_ = job_title;
 435 }
 436
 437 // static
 438 void PrintPreviewUI::SetInitialParams(
 439     content::WebContents* print_preview_dialog,
 440     const PrintHostMsg_RequestPrintPreview_Params& params) {
 441   if (!print_preview_dialog || !print_preview_dialog->GetWebUI())
 442     return;
 443   PrintPreviewUI* print_preview_ui = static_cast<PrintPreviewUI*>(
 444       print_preview_dialog->GetWebUI()->GetController());
 445   print_preview_ui->source_is_modifiable_ = params.is_modifiable;
 446   print_preview_ui->source_has_selection_ = params.has_selection;
 447   print_preview_ui->print_selection_only_ = params.selection_only;
 448 }
 449
 450 // static
 451 void PrintPreviewUI::GetCurrentPrintPreviewStatus(int32 preview_ui_id,
 452                                                   int request_id,
 453                                                   bool* cancel) {
 454   int current_id = -1;
 455   if (!g_print_preview_request_id_map.Get().Get(preview_ui_id, &current_id)) {
 456     *cancel = true;
 457     return;
 458   }
 459   *cancel = (request_id != current_id);
 460 }
 461
 462 int32 PrintPreviewUI::GetIDForPrintPreviewUI() const {
 463   return id_;
 464 }
 465
 466 void PrintPreviewUI::OnPrintPreviewDialogClosed() {
 467   WebContents* preview_dialog = web_ui()->GetWebContents();
 468   printing::BackgroundPrintingManager* background_printing_manager =
 469       g_browser_process->background_printing_manager();
 470   if (background_printing_manager->HasPrintPreviewDialog(preview_dialog))
 471     return;
 472   OnClosePrintPreviewDialog();
 473 }
 474
 475 void PrintPreviewUI::OnInitiatorClosed() {
 476   WebContents* preview_dialog = web_ui()->GetWebContents();
 477   printing::BackgroundPrintingManager* background_printing_manager =
 478       g_browser_process->background_printing_manager();
 479   if (background_printing_manager->HasPrintPreviewDialog(preview_dialog))
 480     web_ui()->CallJavascriptFunction("cancelPendingPrintRequest");
 481   else
 482     OnClosePrintPreviewDialog();
 483 }
 484
 485 void PrintPreviewUI::OnPrintPreviewRequest(int request_id) {
 486   if (!initial_preview_start_time_.is_null()) {
 487     UMA_HISTOGRAM_TIMES("PrintPreview.InitializationTime",
 488                         base::TimeTicks::Now() - initial_preview_start_time_);
 489   }
 490   g_print_preview_request_id_map.Get().Set(id_, request_id);
 491 }
 492
 493 #if defined(ENABLE_BASIC_PRINTING)
 494 void PrintPreviewUI::OnShowSystemDialog() {
 495   web_ui()->CallJavascriptFunction("onSystemDialogLinkClicked");
 496 }
 497 #endif  // ENABLE_BASIC_PRINTING
 498
 499 void PrintPreviewUI::OnDidGetPreviewPageCount(
 500     const PrintHostMsg_DidGetPreviewPageCount_Params& params) {
 501   DCHECK_GT(params.page_count, 0);
 502   if (g_testing_delegate)
 503     g_testing_delegate->DidGetPreviewPageCount(params.page_count);
 504   base::FundamentalValue count(params.page_count);
 505   base::FundamentalValue request_id(params.preview_request_id);
 506   web_ui()->CallJavascriptFunction("onDidGetPreviewPageCount",
 507                                    count,
 508                                    request_id);
 509 }
 510
 511 void PrintPreviewUI::OnDidGetDefaultPageLayout(
 512     const PageSizeMargins& page_layout, const gfx::Rect& printable_area,
 513     bool has_custom_page_size_style) {
 514   if (page_layout.margin_top < 0 || page_layout.margin_left < 0 ||
 515       page_layout.margin_bottom < 0 || page_layout.margin_right < 0 ||
 516       page_layout.content_width < 0 || page_layout.content_height < 0 ||
 517       printable_area.width() <= 0 || printable_area.height() <= 0) {
 518     NOTREACHED();
 519     return;
 520   }
 521
 522   base::DictionaryValue layout;
 523   layout.SetDouble(printing::kSettingMarginTop, page_layout.margin_top);
 524   layout.SetDouble(printing::kSettingMarginLeft, page_layout.margin_left);
 525   layout.SetDouble(printing::kSettingMarginBottom, page_layout.margin_bottom);
 526   layout.SetDouble(printing::kSettingMarginRight, page_layout.margin_right);
 527   layout.SetDouble(printing::kSettingContentWidth, page_layout.content_width);
 528   layout.SetDouble(printing::kSettingContentHeight, page_layout.content_height);
 529   layout.SetInteger(printing::kSettingPrintableAreaX, printable_area.x());
 530   layout.SetInteger(printing::kSettingPrintableAreaY, printable_area.y());
 531   layout.SetInteger(printing::kSettingPrintableAreaWidth,
 532                     printable_area.width());
 533   layout.SetInteger(printing::kSettingPrintableAreaHeight,
 534                     printable_area.height());
 535
 536   base::FundamentalValue has_page_size_style(has_custom_page_size_style);
 537   web_ui()->CallJavascriptFunction("onDidGetDefaultPageLayout", layout,
 538                                    has_page_size_style);
 539 }
 540
 541 void PrintPreviewUI::OnDidPreviewPage(int page_number,
 542                                       int preview_request_id) {
 543   DCHECK_GE(page_number, 0);
 544   base::FundamentalValue number(page_number);
 545   base::FundamentalValue ui_identifier(id_);
 546   base::FundamentalValue request_id(preview_request_id);
 547   if (g_testing_delegate)
 548     g_testing_delegate->DidRenderPreviewPage(web_ui()->GetWebContents());
 549   web_ui()->CallJavascriptFunction(
 550       "onDidPreviewPage", number, ui_identifier, request_id);
 551   if (g_testing_delegate && g_testing_delegate->IsAutoCancelEnabled())
 552     web_ui()->CallJavascriptFunction("autoCancelForTesting");
 553 }
 554
 555 void PrintPreviewUI::OnPreviewDataIsAvailable(int expected_pages_count,
 556                                               int preview_request_id) {
 557   VLOG(1) << "Print preview request finished with "
 558           << expected_pages_count << " pages";
 559
 560   if (!initial_preview_start_time_.is_null()) {
 561     UMA_HISTOGRAM_TIMES("PrintPreview.InitialDisplayTime",
 562                         base::TimeTicks::Now() - initial_preview_start_time_);
 563     UMA_HISTOGRAM_COUNTS("PrintPreview.PageCount.Initial",
 564                          expected_pages_count);
 565     UMA_HISTOGRAM_COUNTS(
 566         "PrintPreview.RegeneratePreviewRequest.BeforeFirstData",
 567         handler_->regenerate_preview_request_count());
 568     initial_preview_start_time_ = base::TimeTicks();
 569   }
 570   base::FundamentalValue ui_identifier(id_);
 571   base::FundamentalValue ui_preview_request_id(preview_request_id);
 572   web_ui()->CallJavascriptFunction("updatePrintPreview", ui_identifier,
 573                                    ui_preview_request_id);
 574 }
 575
 576 void PrintPreviewUI::OnPrintPreviewDialogDestroyed() {
 577   handler_->OnPrintPreviewDialogDestroyed();
 578 }
 579
 580 void PrintPreviewUI::OnFileSelectionCancelled() {
 581   web_ui()->CallJavascriptFunction("fileSelectionCancelled");
 582 }
 583
 584 void PrintPreviewUI::OnCancelPendingPreviewRequest() {
 585   g_print_preview_request_id_map.Get().Set(id_, -1);
 586 }
 587
 588 void PrintPreviewUI::OnPrintPreviewFailed() {
 589   handler_->OnPrintPreviewFailed();
 590   web_ui()->CallJavascriptFunction("printPreviewFailed");
 591 }
 592
 593 void PrintPreviewUI::OnInvalidPrinterSettings() {
 594   web_ui()->CallJavascriptFunction("invalidPrinterSettings");
 595 }
 596
 597 PrintPreviewDataService* PrintPreviewUI::print_preview_data_service() {
 598   return PrintPreviewDataService::GetInstance();
 599 }
 600
 601 void PrintPreviewUI::OnHidePreviewDialog() {
 602   WebContents* preview_dialog = web_ui()->GetWebContents();
 603   printing::BackgroundPrintingManager* background_printing_manager =
 604       g_browser_process->background_printing_manager();
 605   if (background_printing_manager->HasPrintPreviewDialog(preview_dialog))
 606     return;
 607
 608   ConstrainedWebDialogDelegate* delegate = GetConstrainedDelegate();
 609   if (!delegate)
 610     return;
 611   delegate->ReleaseWebContentsOnDialogClose();
 612   background_printing_manager->OwnPrintPreviewDialog(preview_dialog);
 613   OnClosePrintPreviewDialog();
 614 }
 615
 616 void PrintPreviewUI::OnClosePrintPreviewDialog() {
 617   if (dialog_closed_)
 618     return;
 619   dialog_closed_ = true;
 620   ConstrainedWebDialogDelegate* delegate = GetConstrainedDelegate();
 621   if (!delegate)
 622     return;
 623   delegate->GetWebDialogDelegate()->OnDialogClosed(std::string());
 624   delegate->OnDialogCloseFromWebUI();
 625 }
 626
 627 void PrintPreviewUI::OnReloadPrintersList() {
 628   web_ui()->CallJavascriptFunction("reloadPrintersList");
 629 }
 630
 631 void PrintPreviewUI::OnSetOptionsFromDocument(
 632     const PrintHostMsg_SetOptionsFromDocument_Params& params) {
 633   base::DictionaryValue options;
 634   options.SetBoolean(printing::kSettingDisableScaling,
 635                      params.is_scaling_disabled);
 636   options.SetInteger(printing::kSettingCopies, params.copies);
 637   options.SetInteger(printing::kSettingDuplexMode, params.duplex);
 638   web_ui()->CallJavascriptFunction("printPresetOptionsFromDocument", options);
 639 }
 640
 641 // static
 642 void PrintPreviewUI::SetDelegateForTesting(TestingDelegate* delegate) {
 643   g_testing_delegate = delegate;
 644 }
 645
 646 void PrintPreviewUI::SetSelectedFileForTesting(const base::FilePath& path) {
 647   handler_->FileSelected(path, 0, NULL);
 648 }
 649
 650 void PrintPreviewUI::SetPdfSavedClosureForTesting(
 651     const base::Closure& closure) {
 652   handler_->SetPdfSavedClosureForTesting(closure);
 653 }