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 // QueryInterface implementation for nsDOMCSSValueList
  59 NS_INTERFACE_MAP_BEGIN(nsDOMCSSValueList)
  60   NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValueList)
  61   NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValue)
  62   NS_INTERFACE_MAP_ENTRY(nsISupports)
  63   NS_INTERFACE_MAP_ENTRY_CONTENT_CLASSINFO(CSSValueList)
  64 NS_INTERFACE_MAP_END
  65
  66 PRBool
  67 nsDOMCSSValueList::AppendCSSValue(nsIDOMCSSValue* aValue)
  68 {
  69   return mCSSValues.AppendObject(aValue);
  70 }
  71
  72 // nsIDOMCSSValueList
  73
  74 NS_IMETHODIMP
  75 nsDOMCSSValueList::GetLength(PRUint32* aLength)
  76 {
  77   *aLength = mCSSValues.Count();
  78
  79   return NS_OK;
  80 }
  81
  82 NS_IMETHODIMP
  83 nsDOMCSSValueList::Item(PRUint32 aIndex, nsIDOMCSSValue **aReturn)
  84 {
  85   NS_ENSURE_ARG_POINTER(aReturn);
  86
  87   NS_IF_ADDREF(*aReturn = GetItemAt(aIndex));
  88
  89   return NS_OK;
  90 }
  91
  92 // nsIDOMCSSValue
  93
  94 NS_IMETHODIMP
  95 nsDOMCSSValueList::GetCssText(nsAString& aCssText)
  96 {
  97   aCssText.Truncate();
  98
  99   PRUint32 count = mCSSValues.Count();
 100
 101   nsAutoString separator;
 102   if (mCommaDelimited) {
 103     separator.AssignLiteral(", ");
 104   }
 105   else {
 106     separator.Assign(PRUnichar(' '));
 107   }
 108
 109   nsCOMPtr<nsIDOMCSSValue> cssValue;
 110   nsAutoString tmpStr;
 111   for (PRUint32 i = 0; i < count; ++i) {
 112     cssValue = mCSSValues[i];
 113     NS_ASSERTION(cssValue, "Eek!  Someone filled the value list with null CSSValues!");
 114     if (cssValue) {
 115       cssValue->GetCssText(tmpStr);
 116
 117       if (tmpStr.IsEmpty()) {
 118
 119 #ifdef DEBUG_caillon
 120         NS_ERROR("Eek!  An empty CSSValue!  Bad!");
 121 #endif
 122
 123         continue;
 124       }
 125
 126       // If this isn't the first item in the list, then
 127       // it's ok to append a separator.
 128       if (!aCssText.IsEmpty()) {
 129         aCssText.Append(separator);
 130       }
 131       aCssText.Append(tmpStr);
 132     }
 133   }
 134
 135   return NS_OK;
 136 }
 137
 138 NS_IMETHODIMP
 139 nsDOMCSSValueList::SetCssText(const nsAString& aCssText)
 140 {
 141   if (mReadonly) {
 142     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
 143   }
 144
 145   NS_NOTYETIMPLEMENTED("Can't SetCssText yet: please write me!");
 146   return NS_OK;
 147 }
 148
 149
 150 NS_IMETHODIMP
 151 nsDOMCSSValueList::GetCssValueType(PRUint16* aValueType)
 152 {
 153   NS_ENSURE_ARG_POINTER(aValueType);
 154   *aValueType = nsIDOMCSSValue::CSS_VALUE_LIST;
 155   return NS_OK;
 156 }
 157