gecko/layout/style/nsCSSKeywords.cpp

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

/* keywords used within CSS property values */

#include "nsCSSKeywords.h"
#include "nsString.h"
#include "nsStaticNameTable.h"
#include "nsReadableUtils.h"
#include "nsStyleConsts.h"

// required to make the symbol external, so that TestCSSPropertyLookup.cpp can link with it
extern const char* const kCSSRawKeywords[];

// define an array of all CSS keywords
#define CSS_KEY(_name,_id) #_name,
const char* const kCSSRawKeywords[] = {
#include "nsCSSKeywordList.h"
};
#undef CSS_KEY

static PRInt32 gTableRefCount;
static nsStaticCaseInsensitiveNameTable* gKeywordTable;

void
nsCSSKeywords::AddRefTable(void) 
{
  if (0 == gTableRefCount++) {
    NS_ASSERTION(!gKeywordTable, "pre existing array!");
    gKeywordTable = new nsStaticCaseInsensitiveNameTable();
    if (gKeywordTable) {
#ifdef DEBUG
    {
      // let's verify the table...
      PRInt32 index = 0;
      for (; index < eCSSKeyword_COUNT && kCSSRawKeywords[index]; ++index) {
        nsCAutoString temp1(kCSSRawKeywords[index]);
        nsCAutoString temp2(kCSSRawKeywords[index]);
        ToLowerCase(temp1);
        NS_ASSERTION(temp1.Equals(temp2), "upper case char in table");
        NS_ASSERTION(-1 == temp1.FindChar('_'), "underscore char in table");
      }
      NS_ASSERTION(index == eCSSKeyword_COUNT, "kCSSRawKeywords and eCSSKeyword_COUNT are out of sync");
    }
#endif      
      gKeywordTable->Init(kCSSRawKeywords, eCSSKeyword_COUNT); 
    }
  }
}

void
nsCSSKeywords::ReleaseTable(void) 
{
  if (0 == --gTableRefCount) {
    if (gKeywordTable) {
      delete gKeywordTable;
      gKeywordTable = nsnull;
    }
  }
}

nsCSSKeyword 
nsCSSKeywords::LookupKeyword(const nsACString& aKeyword)
{
  NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  if (gKeywordTable) {
    return nsCSSKeyword(gKeywordTable->Lookup(aKeyword));
  }  
  return eCSSKeyword_UNKNOWN;
}

nsCSSKeyword 
nsCSSKeywords::LookupKeyword(const nsAString& aKeyword)
{
  NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  if (gKeywordTable) {
    return nsCSSKeyword(gKeywordTable->Lookup(aKeyword));
  }  
  return eCSSKeyword_UNKNOWN;
}

const nsAFlatCString& 
nsCSSKeywords::GetStringValue(nsCSSKeyword aKeyword)
{
  NS_ASSERTION(gKeywordTable, "no lookup table, needs addref");
  NS_ASSERTION(0 <= aKeyword && aKeyword < eCSSKeyword_COUNT, "out of range");
  if (gKeywordTable) {
    return gKeywordTable->GetStringValue(PRInt32(aKeyword));
  } else {
    static nsDependentCString kNullStr("");
    return kNullStr;
  }
}