text: // Copyright 2015 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 "shell/browser/extensions/api/resources_private/resources_private_api.h"
  
  #include <memory>
  #include <string>
  #include <utility>
  
  #include "base/values.h"
  #include "chrome/browser/browser_process.h"
  #include "chrome/common/extensions/api/resources_private.h"
  #include "chrome/grit/generated_resources.h"
  #include "components/strings/grit/components_strings.h"
  #include "components/zoom/page_zoom_constants.h"
  #include "pdf/buildflags.h"
  #include "printing/buildflags/buildflags.h"
  #include "ui/base/l10n/l10n_util.h"
  #include "ui/base/webui/web_ui_util.h"
  
  #if BUILDFLAG(ENABLE_PDF)
  #include "pdf/pdf_features.h"
  #endif  // BUILDFLAG(ENABLE_PDF)
  
  // To add a new component to this API, simply:
  // 1. Add your component to the Component enum in
  //      chrome/common/extensions/api/resources_private.idl
  // 2. Create an AddStringsForMyComponent(base::DictionaryValue * dict) method.
  // 3. Tie in that method to the switch statement in Run()
  
  namespace extensions {
  
  namespace {
  
  void AddStringsForPdf(base::DictionaryValue* dict) {
  #if BUILDFLAG(ENABLE_PDF)
    static constexpr webui::LocalizedString kPdfResources[] = {
        {"passwordDialogTitle", IDS_PDF_PASSWORD_DIALOG_TITLE},
        {"passwordPrompt", IDS_PDF_NEED_PASSWORD},
        {"passwordSubmit", IDS_PDF_PASSWORD_SUBMIT},
        {"passwordInvalid", IDS_PDF_PASSWORD_INVALID},
        {"pageLoading", IDS_PDF_PAGE_LOADING},
        {"pageLoadFailed", IDS_PDF_PAGE_LOAD_FAILED},
        {"errorDialogTitle", IDS_PDF_ERROR_DIALOG_TITLE},
        {"pageReload", IDS_PDF_PAGE_RELOAD_BUTTON},
        {"bookmarks", IDS_PDF_BOOKMARKS},
        {"labelPageNumber", IDS_PDF_LABEL_PAGE_NUMBER},
        {"tooltipRotateCW", IDS_PDF_TOOLTIP_ROTATE_CW},
        {"tooltipDownload", IDS_PDF_TOOLTIP_DOWNLOAD},
        {"tooltipPrint", IDS_PDF_TOOLTIP_PRINT},
        {"tooltipFitToPage", IDS_PDF_TOOLTIP_FIT_PAGE},
        {"tooltipFitToWidth", IDS_PDF_TOOLTIP_FIT_WIDTH},
        {"tooltipZoomIn", IDS_PDF_TOOLTIP_ZOOM_IN},
        {"tooltipZoomOut", IDS_PDF_TOOLTIP_ZOOM_OUT},
    };
    for (const auto& resource : kPdfResources)
      dict->SetString(resource.name, l10n_util::GetStringUTF16(resource.id));
  
    dict->SetString("presetZoomFactors", zoom::GetPresetZoomFactorsAsJSON());
  #endif  // BUILDFLAG(ENABLE_PDF)
  }
  
  void AddAdditionalDataForPdf(base::DictionaryValue* dict) {
  #if BUILDFLAG(ENABLE_PDF)
    dict->SetStringKey(
        "pdfViewerUpdateEnabledAttribute",
        base::FeatureList::IsEnabled(chrome_pdf::features::kPDFViewerUpdate)
            ? "pdf-viewer-update-enabled"
            : "");
    dict->SetKey("pdfFormSaveEnabled",
                 base::Value(base::FeatureList::IsEnabled(
                     chrome_pdf::features::kSaveEditedPDFForm)));
    dict->SetKey("pdfAnnotationsEnabled", base::Value(false));
    dict->SetKey("printingEnabled", base::Value(true));
  #endif  // BUILDFLAG(ENABLE_PDF)
  }
  
  }  // namespace
  
  namespace get_strings = api::resources_private::GetStrings;
  
  ResourcesPrivateGetStringsFunction::ResourcesPrivateGetStringsFunction() {}
  
  ResourcesPrivateGetStringsFunction::~ResourcesPrivateGetStringsFunction() {}
  
  ExtensionFunction::ResponseAction ResourcesPrivateGetStringsFunction::Run() {
    std::unique_ptr<get_strings::Params> params(
        get_strings::Params::Create(*args_));
    auto dict = std::make_unique<base::DictionaryValue>();
  
    api::resources_private::Component component = params->component;
  
    switch (component) {
      case api::resources_private::COMPONENT_PDF:
        AddStringsForPdf(dict.get());
        AddAdditionalDataForPdf(dict.get());
        break;
      case api::resources_private::COMPONENT_IDENTITY:
        NOTREACHED();
        break;
      case api::resources_private::COMPONENT_NONE:
        NOTREACHED();
        break;
    }
  
    const std::string& app_locale = g_browser_process->GetApplicationLocale();
    webui::SetLoadTimeDataDefaults(app_locale, dict.get());
  
    return RespondNow(OneArgument(std::move(dict)));
  }
  
  }  // namespace extensions
  