intl/locale/Quotes.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode:nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "Quotes.h"
   7 #include "mozilla/ClearOnShutdown.h"
   8 #include "mozilla/StaticPtr.h"
   9 #include "mozilla/intl/Locale.h"
  10 #include "nsTHashMap.h"
  11 #include "nsPrintfCString.h"
  12
  13 using namespace mozilla;
  14 using namespace mozilla::intl;
  15
  16 namespace {
  17 struct LangQuotesRec {
  18   const char* mLangs;
  19   Quotes mQuotes;
  20 };
  21
  22 #include "cldr-quotes.inc"
  23
  24 static StaticAutoPtr<nsTHashMap<nsCStringHashKey, Quotes>> sQuotesForLang;
  25 }  // anonymous namespace
  26
  27 namespace mozilla {
  28 namespace intl {
  29
  30 const Quotes* QuotesForLang(const nsAtom* aLang) {
  31   MOZ_ASSERT(NS_IsMainThread());
  32
  33   // On first use, initialize the hashtable from our CLDR-derived data array.
  34   if (!sQuotesForLang) {
  35     sQuotesForLang = new nsTHashMap<nsCStringHashKey, Quotes>(32);
  36     ClearOnShutdown(&sQuotesForLang);
  37     for (const auto& i : sLangQuotes) {
  38       const char* s = i.mLangs;
  39       size_t len;
  40       while ((len = strlen(s))) {
  41         sQuotesForLang->InsertOrUpdate(nsDependentCString(s, len), i.mQuotes);
  42         s += len + 1;
  43       }
  44     }
  45   }
  46
  47   nsAtomCString langStr(aLang);
  48   const Quotes* entry = sQuotesForLang->Lookup(langStr).DataPtrOrNull();
  49   if (entry) {
  50     // Found an exact match for the requested lang.
  51     return entry;
  52   }
  53
  54   // Try parsing lang as a Locale and canonicalizing the subtags, then see if
  55   // we can match it with region or script subtags, if present, or just the
  56   // primary language tag.
  57   Locale loc;
  58   auto result = LocaleParser::TryParse(langStr, loc);
  59   if (result.isErr()) {
  60     return nullptr;
  61   }
  62   if (loc.Canonicalize().isErr()) {
  63     return nullptr;
  64   }
  65   if (loc.Region().Present()) {
  66     nsAutoCString langAndRegion;
  67     langAndRegion.Append(loc.Language().Span());
  68     langAndRegion.Append('-');
  69     langAndRegion.Append(loc.Region().Span());
  70     if ((entry = sQuotesForLang->Lookup(langAndRegion).DataPtrOrNull())) {
  71       return entry;
  72     }
  73   }
  74   if (loc.Script().Present()) {
  75     nsAutoCString langAndScript;
  76     langAndScript.Append(loc.Language().Span());
  77     langAndScript.Append('-');
  78     langAndScript.Append(loc.Script().Span());
  79     if ((entry = sQuotesForLang->Lookup(langAndScript).DataPtrOrNull())) {
  80       return entry;
  81     }
  82   }
  83   Span<const char> langAsSpan = loc.Language().Span();
  84   nsAutoCString lang(langAsSpan.data(), langAsSpan.size());
  85   if ((entry = sQuotesForLang->Lookup(lang).DataPtrOrNull())) {
  86     return entry;
  87   }
  88
  89   return nullptr;
  90 }
  91
  92 }  // namespace intl
  93 }  // namespace mozilla