layout/style/nsCSSKeywords.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 /* keywords used within CSS property values */
   7
   8 #include "nsCSSKeywords.h"
   9 #include "nsString.h"
  10 #include "nsStaticNameTable.h"
  11
  12 // required to make the symbol external, so that TestCSSPropertyLookup.cpp can link with it
  13 extern const char* const kCSSRawKeywords[];
  14
  15 // define an array of all CSS keywords
  16 #define CSS_KEY(_name,_id) #_name,
  17 const char* const kCSSRawKeywords[] = {
  18 #include "nsCSSKeywordList.h"
  19 };
  20 #undef CSS_KEY
  21
  22 static int32_t gKeywordTableRefCount;
  23 static nsStaticCaseInsensitiveNameTable* gKeywordTable;
  24
  25 void
  26 nsCSSKeywords::AddRefTable(void)
  27 {
  28   if (0 == gKeywordTableRefCount++) {
  29     NS_ASSERTION(!gKeywordTable, "pre existing array!");
  30     gKeywordTable = new nsStaticCaseInsensitiveNameTable();
  31     if (gKeywordTable) {
  32 #ifdef DEBUG
  33     {
  34       // let's verify the table...
  35       int32_t index = 0;
  36       for (; index < eCSSKeyword_COUNT && kCSSRawKeywords[index]; ++index) {
  37         nsAutoCString temp1(kCSSRawKeywords[index]);
  38         nsAutoCString temp2(kCSSRawKeywords[index]);
  39         ToLowerCase(temp1);
  40         NS_ASSERTION(temp1.Equals(temp2), "upper case char in table");
  41         NS_ASSERTION(-1 == temp1.FindChar('_'), "underscore char in table");
  42       }
  43       NS_ASSERTION(index == eCSSKeyword_COUNT, "kCSSRawKeywords and eCSSKeyword_COUNT are out of sync");
  44     }
  45 #endif
  46       gKeywordTable->Init(kCSSRawKeywords, eCSSKeyword_COUNT);
  47     }
  48   }
  49 }
  50
  51 void
  52 nsCSSKeywords::ReleaseTable(void)
  53 {
  54   if (0 == --gKeywordTableRefCount) {
  55     if (gKeywordTable) {
  56       delete gKeywordTable;
  57       gKeywordTable = nullptr;
  58     }
  59   }
  60 }
  61
  62 nsCSSKeyword
  63 nsCSSKeywords::LookupKeyword(const nsACString& aKeyword)
  64 {
  65   NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  66   if (gKeywordTable) {
  67     return nsCSSKeyword(gKeywordTable->Lookup(aKeyword));
  68   }
  69   return eCSSKeyword_UNKNOWN;
  70 }
  71
  72 nsCSSKeyword
  73 nsCSSKeywords::LookupKeyword(const nsAString& aKeyword)
  74 {
  75   NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  76   if (gKeywordTable) {
  77     return nsCSSKeyword(gKeywordTable->Lookup(aKeyword));
  78   }
  79   return eCSSKeyword_UNKNOWN;
  80 }
  81
  82 const nsAFlatCString&
  83 nsCSSKeywords::GetStringValue(nsCSSKeyword aKeyword)
  84 {
  85   NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  86   NS_ASSERTION(0 <= aKeyword && aKeyword < eCSSKeyword_COUNT, "out of range");
  87   if (gKeywordTable) {
  88     return gKeywordTable->GetStringValue(int32_t(aKeyword));
  89   } else {
  90     static nsDependentCString kNullStr("");
  91     return kNullStr;
  92   }
  93 }
  94