layout/style/nsCSSKeywords.cpp

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  37
  38 /* keywords used within CSS property values */
  39
  40 #include "nsCSSKeywords.h"
  41 #include "nsString.h"
  42 #include "nsStaticNameTable.h"
  43 #include "nsReadableUtils.h"
  44 #include "nsStyleConsts.h"
  45
  46 // required to make the symbol external, so that TestCSSPropertyLookup.cpp can link with it
  47 extern const char* const kCSSRawKeywords[];
  48
  49 // define an array of all CSS keywords
  50 #define CSS_KEY(_name,_id) #_name,
  51 const char* const kCSSRawKeywords[] = {
  52 #include "nsCSSKeywordList.h"
  53 };
  54 #undef CSS_KEY
  55
  56 static PRInt32 gTableRefCount;
  57 static nsStaticCaseInsensitiveNameTable* gKeywordTable;
  58
  59 void
  60 nsCSSKeywords::AddRefTable(void)
  61 {
  62   if (0 == gTableRefCount++) {
  63     NS_ASSERTION(!gKeywordTable, "pre existing array!");
  64     gKeywordTable = new nsStaticCaseInsensitiveNameTable();
  65     if (gKeywordTable) {
  66 #ifdef DEBUG
  67     {
  68       // let's verify the table...
  69       PRInt32 index = 0;
  70       for (; index < eCSSKeyword_COUNT && kCSSRawKeywords[index]; ++index) {
  71         nsCAutoString temp1(kCSSRawKeywords[index]);
  72         nsCAutoString temp2(kCSSRawKeywords[index]);
  73         ToLowerCase(temp1);
  74         NS_ASSERTION(temp1.Equals(temp2), "upper case char in table");
  75         NS_ASSERTION(-1 == temp1.FindChar('_'), "underscore char in table");
  76       }
  77       NS_ASSERTION(index == eCSSKeyword_COUNT, "kCSSRawKeywords and eCSSKeyword_COUNT are out of sync");
  78     }
  79 #endif
  80       gKeywordTable->Init(kCSSRawKeywords, eCSSKeyword_COUNT);
  81     }
  82   }
  83 }
  84
  85 void
  86 nsCSSKeywords::ReleaseTable(void)
  87 {
  88   if (0 == --gTableRefCount) {
  89     if (gKeywordTable) {
  90       delete gKeywordTable;
  91       gKeywordTable = nsnull;
  92     }
  93   }
  94 }
  95
  96 nsCSSKeyword
  97 nsCSSKeywords::LookupKeyword(const nsACString& aKeyword)
  98 {
  99   NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
 100   if (gKeywordTable) {
 101     return nsCSSKeyword(gKeywordTable->Lookup(aKeyword));
 102   }
 103   return eCSSKeyword_UNKNOWN;
 104 }
 105
 106 nsCSSKeyword
 107 nsCSSKeywords::LookupKeyword(const nsAString& aKeyword)
 108 {
 109   NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
 110   if (gKeywordTable) {
 111     return nsCSSKeyword(gKeywordTable->Lookup(aKeyword));
 112   }
 113   return eCSSKeyword_UNKNOWN;
 114 }
 115
 116 const nsAFlatCString&
 117 nsCSSKeywords::GetStringValue(nsCSSKeyword aKeyword)
 118 {
 119   NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
 120   NS_ASSERTION(0 <= aKeyword && aKeyword < eCSSKeyword_COUNT, "out of range");
 121   if (gKeywordTable) {
 122     return gKeywordTable->GetStringValue(PRInt32(aKeyword));
 123   } else {
 124     static nsDependentCString kNullStr("");
 125     return kNullStr;
 126   }
 127 }
 128