layout/style/nsDOMCSSValueList.cpp

   1 /* This Source Code Form is subject to the terms of the Mozilla Public
   2  * License, v. 2.0. If a copy of the MPL was not distributed with this
   3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   4
   5 /* DOM object representing lists of values in DOM computed style */
   6
   7 #include "nsDOMCSSValueList.h"
   8 #include "mozilla/dom/CSSValueListBinding.h"
   9 #include "nsAutoPtr.h"
  10
  11 using namespace mozilla;
  12
  13 nsDOMCSSValueList::nsDOMCSSValueList(bool aCommaDelimited, bool aReadonly)
  14   : CSSValue(), mCommaDelimited(aCommaDelimited), mReadonly(aReadonly)
  15 {
  16   SetIsDOMBinding();
  17 }
  18
  19 nsDOMCSSValueList::~nsDOMCSSValueList()
  20 {
  21 }
  22
  23 NS_IMPL_CYCLE_COLLECTING_ADDREF(nsDOMCSSValueList)
  24 NS_IMPL_CYCLE_COLLECTING_RELEASE(nsDOMCSSValueList)
  25
  26 // QueryInterface implementation for nsDOMCSSValueList
  27 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMCSSValueList)
  28   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  29   NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValue)
  30   NS_INTERFACE_MAP_ENTRY(nsIDOMCSSValueList)
  31   NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, CSSValue)
  32 NS_INTERFACE_MAP_END
  33
  34 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(nsDOMCSSValueList, mCSSValues)
  35
  36 JSObject*
  37 nsDOMCSSValueList::WrapObject(JSContext *cx)
  38 {
  39   return dom::CSSValueListBinding::Wrap(cx, this);
  40 }
  41
  42 void
  43 nsDOMCSSValueList::AppendCSSValue(CSSValue* aValue)
  44 {
  45   mCSSValues.AppendElement(aValue);
  46 }
  47
  48 // nsIDOMCSSValue
  49
  50 NS_IMETHODIMP
  51 nsDOMCSSValueList::GetCssText(nsAString& aCssText)
  52 {
  53   aCssText.Truncate();
  54
  55   uint32_t count = mCSSValues.Length();
  56
  57   nsAutoString separator;
  58   if (mCommaDelimited) {
  59     separator.AssignLiteral(", ");
  60   }
  61   else {
  62     separator.Assign(char16_t(' '));
  63   }
  64
  65   nsAutoString tmpStr;
  66   for (uint32_t i = 0; i < count; ++i) {
  67     CSSValue *cssValue = mCSSValues[i];
  68     NS_ASSERTION(cssValue, "Eek!  Someone filled the value list with null CSSValues!");
  69     ErrorResult dummy;
  70     if (cssValue) {
  71       cssValue->GetCssText(tmpStr, dummy);
  72
  73       if (tmpStr.IsEmpty()) {
  74
  75 #ifdef DEBUG_caillon
  76         NS_ERROR("Eek!  An empty CSSValue!  Bad!");
  77 #endif
  78
  79         continue;
  80       }
  81
  82       // If this isn't the first item in the list, then
  83       // it's ok to append a separator.
  84       if (!aCssText.IsEmpty()) {
  85         aCssText.Append(separator);
  86       }
  87       aCssText.Append(tmpStr);
  88     }
  89   }
  90
  91   return NS_OK;
  92 }
  93
  94 void
  95 nsDOMCSSValueList::GetCssText(nsString& aText, ErrorResult& aRv)
  96 {
  97   aRv = GetCssText(aText);
  98 }
  99
 100 NS_IMETHODIMP
 101 nsDOMCSSValueList::SetCssText(const nsAString& aCssText)
 102 {
 103   if (mReadonly) {
 104     return NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR;
 105   }
 106
 107   NS_NOTYETIMPLEMENTED("Can't SetCssText yet: please write me!");
 108   return NS_OK;
 109 }
 110
 111 void
 112 nsDOMCSSValueList::SetCssText(const nsAString& aText, ErrorResult& aRv)
 113 {
 114   aRv = SetCssText(aText);
 115 }
 116
 117 NS_IMETHODIMP
 118 nsDOMCSSValueList::GetCssValueType(uint16_t* aValueType)
 119 {
 120   NS_ENSURE_ARG_POINTER(aValueType);
 121   *aValueType = nsIDOMCSSValue::CSS_VALUE_LIST;
 122   return NS_OK;
 123 }
 124
 125 uint16_t
 126 nsDOMCSSValueList::CssValueType() const
 127 {
 128   return nsIDOMCSSValue::CSS_VALUE_LIST;
 129 }