firefox/chrome/nsChromeRegistryContent.cpp

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "RegistryMessageUtils.h"
#include "nsChromeRegistryContent.h"
#include "nsISubstitutingProtocolHandler.h"
#include "nsString.h"
#include "nsNetUtil.h"
#include "mozilla/UniquePtr.h"

nsChromeRegistryContent::nsChromeRegistryContent() = default;

void nsChromeRegistryContent::RegisterRemoteChrome(
    const nsTArray<ChromePackage>& aPackages,
    const nsTArray<SubstitutionMapping>& aSubstitutions,
    const nsTArray<OverrideMapping>& aOverrides, const nsACString& aLocale,
    bool aReset) {
  MOZ_ASSERT(aReset || mLocale.IsEmpty(), "RegisterChrome twice?");

  if (aReset) {
    mPackagesHash.Clear();
    mOverrideTable.Clear();
    // XXX Can't clear resources.
  }

  for (uint32_t i = aPackages.Length(); i > 0;) {
    --i;
    RegisterPackage(aPackages[i]);
  }

  for (uint32_t i = aSubstitutions.Length(); i > 0;) {
    --i;
    RegisterSubstitution(aSubstitutions[i]);
  }

  for (uint32_t i = aOverrides.Length(); i > 0;) {
    --i;
    RegisterOverride(aOverrides[i]);
  }

  mLocale = aLocale;
}

void nsChromeRegistryContent::RegisterPackage(const ChromePackage& aPackage) {
  nsCOMPtr<nsIURI> content, locale, skin;

  if (aPackage.contentBaseURI.spec.Length()) {
    nsresult rv =
        NS_NewURI(getter_AddRefs(content), aPackage.contentBaseURI.spec);
    if (NS_FAILED(rv)) return;
  }
  if (aPackage.localeBaseURI.spec.Length()) {
    nsresult rv =
        NS_NewURI(getter_AddRefs(locale), aPackage.localeBaseURI.spec);
    if (NS_FAILED(rv)) return;
  }
  if (aPackage.skinBaseURI.spec.Length()) {
    nsresult rv = NS_NewURI(getter_AddRefs(skin), aPackage.skinBaseURI.spec);
    if (NS_FAILED(rv)) return;
  }

  mozilla::UniquePtr<PackageEntry> entry = mozilla::MakeUnique<PackageEntry>();
  entry->flags = aPackage.flags;
  entry->contentBaseURI = std::move(content);
  entry->localeBaseURI = std::move(locale);
  entry->skinBaseURI = std::move(skin);

  mPackagesHash.InsertOrUpdate(aPackage.package, std::move(entry));
}

void nsChromeRegistryContent::RegisterSubstitution(
    const SubstitutionMapping& aSubstitution) {
  nsCOMPtr<nsIIOService> io(do_GetIOService());
  if (!io) return;

  nsCOMPtr<nsIProtocolHandler> ph;
  nsresult rv =
      io->GetProtocolHandler(aSubstitution.scheme.get(), getter_AddRefs(ph));
  if (NS_FAILED(rv)) return;

  nsCOMPtr<nsISubstitutingProtocolHandler> sph(do_QueryInterface(ph));
  if (!sph) return;

  nsCOMPtr<nsIURI> resolvedURI;
  if (aSubstitution.resolvedURI.spec.Length()) {
    rv = NS_NewURI(getter_AddRefs(resolvedURI), aSubstitution.resolvedURI.spec);
    if (NS_FAILED(rv)) return;
  }

  rv = sph->SetSubstitutionWithFlags(aSubstitution.path, resolvedURI,
                                     aSubstitution.flags);
  if (NS_FAILED(rv)) return;
}

void nsChromeRegistryContent::RegisterOverride(
    const OverrideMapping& aOverride) {
  nsCOMPtr<nsIURI> chromeURI, overrideURI;
  nsresult rv =
      NS_NewURI(getter_AddRefs(chromeURI), aOverride.originalURI.spec);
  if (NS_FAILED(rv)) return;

  rv = NS_NewURI(getter_AddRefs(overrideURI), aOverride.overrideURI.spec);
  if (NS_FAILED(rv)) return;

  mOverrideTable.InsertOrUpdate(chromeURI, overrideURI);
}

nsIURI* nsChromeRegistryContent::GetBaseURIFromPackage(
    const nsCString& aPackage, const nsCString& aProvider,
    const nsCString& aPath) {
  PackageEntry* entry;
  if (!mPackagesHash.Get(aPackage, &entry)) {
    return nullptr;
  }

  if (aProvider.EqualsLiteral("locale")) {
    return entry->localeBaseURI;
  }

  if (aProvider.EqualsLiteral("skin")) {
    return entry->skinBaseURI;
  }

  if (aProvider.EqualsLiteral("content")) {
    return entry->contentBaseURI;
  }

  return nullptr;
}

nsresult nsChromeRegistryContent::GetFlagsFromPackage(const nsCString& aPackage,
                                                      uint32_t* aFlags) {
  PackageEntry* entry;
  if (!mPackagesHash.Get(aPackage, &entry)) {
    return NS_ERROR_FAILURE;
  }
  *aFlags = entry->flags;
  return NS_OK;
}

// All functions following only make sense in chrome, and therefore assert

#define CONTENT_NOTREACHED() \
  MOZ_ASSERT_UNREACHABLE("Content should not be calling this")

#define CONTENT_NOT_IMPLEMENTED() \
  CONTENT_NOTREACHED();           \
  return NS_ERROR_NOT_IMPLEMENTED;

NS_IMETHODIMP
nsChromeRegistryContent::GetLocalesForPackage(
    const nsACString& aPackage, nsIUTF8StringEnumerator** aResult) {
  CONTENT_NOT_IMPLEMENTED();
}

NS_IMETHODIMP
nsChromeRegistryContent::CheckForNewChrome() { CONTENT_NOT_IMPLEMENTED(); }

NS_IMETHODIMP
nsChromeRegistryContent::IsLocaleRTL(const nsACString& aPackage,
                                     bool* aResult) {
  *aResult = mozilla::intl::LocaleService::IsLocaleRTL(mLocale);
  return NS_OK;
}

NS_IMETHODIMP
nsChromeRegistryContent::Observe(nsISupports* aSubject, const char* aTopic,
                                 const char16_t* aData) {
  CONTENT_NOT_IMPLEMENTED();
}

void nsChromeRegistryContent::ManifestContent(ManifestProcessingContext& cx,
                                              int lineno, char* const* argv,
                                              int flags) {
  CONTENT_NOTREACHED();
}

void nsChromeRegistryContent::ManifestLocale(ManifestProcessingContext& cx,
                                             int lineno, char* const* argv,
                                             int flags) {
  CONTENT_NOTREACHED();
}

void nsChromeRegistryContent::ManifestSkin(ManifestProcessingContext& cx,
                                           int lineno, char* const* argv,
                                           int flags) {
  CONTENT_NOTREACHED();
}

void nsChromeRegistryContent::ManifestOverride(ManifestProcessingContext& cx,
                                               int lineno, char* const* argv,
                                               int flags) {
  CONTENT_NOTREACHED();
}

void nsChromeRegistryContent::ManifestResource(ManifestProcessingContext& cx,
                                               int lineno, char* const* argv,
                                               int flags) {
  CONTENT_NOTREACHED();
}