layout/style/nsDOMCSSValueList.cpp

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   3  *
   4  * The contents of this file are subject to the Mozilla Public License Version
   5  * 1.1 (the "License"); you may not use this file except in compliance with
   6  * the License. You may obtain a copy of the License at
   7  * http://www.mozilla.org/MPL/
   8  *
   9  * Software distributed under the License is distributed on an "AS IS" basis,
  10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11  * for the specific language governing rights and limitations under the
  12  * License.
  13  *
  14  * The Original Code is mozilla.org code.
  15  *
  16  * The Initial Developer of the Original Code is
  17  * Netscape Communications Corporation.
  18  * Portions created by the Initial Developer are Copyright (C) 2002
  19  * the Initial Developer. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *   Christopher A. Aillon <christopher@aillon.com> (original author)
  23  *
  24  * Alternatively, the contents of this file may be used under the terms of
  25  * either the GNU General Public License Version 2 or later (the "GPL"), or
  26  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  27  * in which case the provisions of the GPL or the LGPL are applicable instead
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  33  * the provisions above, a recipient may use your version of this file under
  34  * the terms of any one of the MPL, the GPL or the LGPL.
  35  *
  36  * ***** END LICENSE BLOCK ***** */
  37
  38 /* DOM object representing lists of values in DOM computed style */
  39
  40 #include "nsDOMCSSValueList.h"
  41 #include "nsCOMPtr.h"
  42 #include "nsDOMError.h"
  43 #include "prtypes.h"
  44 #include "nsContentUtils.h"
  45
  46 nsDOMCSSValueList::nsDOMCSSValueList(PRBool aCommaDelimited, PRBool aReadonly)
  47   : mCommaDelimited(aCommaDelimited), mReadonly(aReadonly)
  48 {
  49 }
  50
  51 nsDOMCSSValueList::~nsDOMCSSValueList()
  52 {
  53 }
  54
  55 NS_IMPL_ADDREF(nsDOMCSSValueList)
  56 NS_IMPL_RELEASE(nsDOMCSSValueList)
  57
  58 DOMCI_DATA(CSSValueList, nsDOMCSSValueList)
  59
  60 // QueryInterface implementation for nsDOMCSSValueList
  61 NS_INTERFACE_MAP_BEGIN(nsDOMCSSValueList)
  62   NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValueList)
  63   NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValue)
  64   NS_INTERFACE_MAP_ENTRY(nsISupports)
  65   NS_DOM_INTERFACE_MAP_ENTRY_CLASSINFO(CSSValueList)
  66 NS_INTERFACE_MAP_END
  67
  68 PRBool
  69 nsDOMCSSValueList::AppendCSSValue(nsIDOMCSSValue* aValue)
  70 {
  71   return mCSSValues.AppendObject(aValue);
  72 }
  73
  74 // nsIDOMCSSValueList
  75
  76 NS_IMETHODIMP
  77 nsDOMCSSValueList::GetLength(PRUint32* aLength)
  78 {
  79   *aLength = mCSSValues.Count();
  80
  81   return NS_OK;
  82 }
  83
  84 NS_IMETHODIMP
  85 nsDOMCSSValueList::Item(PRUint32 aIndex, nsIDOMCSSValue **aReturn)
  86 {
  87   NS_ENSURE_ARG_POINTER(aReturn);
  88
  89   NS_IF_ADDREF(*aReturn = GetItemAt(aIndex));
  90
  91   return NS_OK;
  92 }
  93
  94 // nsIDOMCSSValue
  95
  96 NS_IMETHODIMP
  97 nsDOMCSSValueList::GetCssText(nsAString& aCssText)
  98 {
  99   aCssText.Truncate();
 100
 101   PRUint32 count = mCSSValues.Count();
 102
 103   nsAutoString separator;
 104   if (mCommaDelimited) {
 105     separator.AssignLiteral(", ");
 106   }
 107   else {
 108     separator.Assign(PRUnichar(' '));
 109   }
 110
 111   nsCOMPtr<nsIDOMCSSValue> cssValue;
 112   nsAutoString tmpStr;
 113   for (PRUint32 i = 0; i < count; ++i) {
 114     cssValue = mCSSValues[i];
 115     NS_ASSERTION(cssValue, "Eek!  Someone filled the value list with null CSSValues!");
 116     if (cssValue) {
 117       cssValue->GetCssText(tmpStr);
 118
 119       if (tmpStr.IsEmpty()) {
 120
 121 #ifdef DEBUG_caillon
 122         NS_ERROR("Eek!  An empty CSSValue!  Bad!");
 123 #endif
 124
 125         continue;
 126       }
 127
 128       // If this isn't the first item in the list, then
 129       // it's ok to append a separator.
 130       if (!aCssText.IsEmpty()) {
 131         aCssText.Append(separator);
 132       }
 133       aCssText.Append(tmpStr);
 134     }
 135   }
 136
 137   return NS_OK;
 138 }
 139
 140 NS_IMETHODIMP
 141 nsDOMCSSValueList::SetCssText(const nsAString& aCssText)
 142 {
 143   if (mReadonly) {
 144     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
 145   }
 146
 147   NS_NOTYETIMPLEMENTED("Can't SetCssText yet: please write me!");
 148   return NS_OK;
 149 }
 150
 151
 152 NS_IMETHODIMP
 153 nsDOMCSSValueList::GetCssValueType(PRUint16* aValueType)
 154 {
 155   NS_ENSURE_ARG_POINTER(aValueType);
 156   *aValueType = nsIDOMCSSValue::CSS_VALUE_LIST;
 157   return NS_OK;
 158 }
 159