layout/style/nsDOMCSSValueList.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 /* DOM object representing lists of values in DOM computed style */
   8
   9 #include "nsDOMCSSValueList.h"
  10
  11 #include <utility>
  12
  13 #include "mozilla/ErrorResult.h"
  14 #include "nsString.h"
  15
  16 using namespace mozilla;
  17 using namespace mozilla::dom;
  18
  19 nsDOMCSSValueList::nsDOMCSSValueList(bool aCommaDelimited)
  20     : CSSValue(), mCommaDelimited(aCommaDelimited) {}
  21
  22 nsDOMCSSValueList::~nsDOMCSSValueList() = default;
  23
  24 void nsDOMCSSValueList::AppendCSSValue(already_AddRefed<CSSValue> aValue) {
  25   RefPtr<CSSValue> val = aValue;
  26   mCSSValues.AppendElement(std::move(val));
  27 }
  28
  29 void nsDOMCSSValueList::GetCssText(nsAString& aCssText) {
  30   aCssText.Truncate();
  31
  32   uint32_t count = mCSSValues.Length();
  33
  34   nsAutoString separator;
  35   if (mCommaDelimited) {
  36     separator.AssignLiteral(", ");
  37   } else {
  38     separator.Assign(char16_t(' '));
  39   }
  40
  41   nsAutoString tmpStr;
  42   for (uint32_t i = 0; i < count; ++i) {
  43     CSSValue* cssValue = mCSSValues[i];
  44     NS_ASSERTION(cssValue,
  45                  "Eek!  Someone filled the value list with null CSSValues!");
  46     if (cssValue) {
  47       cssValue->GetCssText(tmpStr);
  48       if (tmpStr.IsEmpty()) {
  49 #ifdef DEBUG_caillon
  50         NS_ERROR("Eek!  An empty CSSValue!  Bad!");
  51 #endif
  52         continue;
  53       }
  54       // If this isn't the first item in the list, then
  55       // it's ok to append a separator.
  56       if (!aCssText.IsEmpty()) {
  57         aCssText.Append(separator);
  58       }
  59       aCssText.Append(tmpStr);
  60     }
  61   }
  62 }