dom/svg/SVGNumberList.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 #include "SVGNumberList.h"
   8
   9 #include "mozilla/ArrayUtils.h"
  10 #include "nsCharSeparatedTokenizer.h"
  11 #include "nsContentUtils.h"
  12 #include "nsString.h"
  13 #include "nsTextFormatter.h"
  14 #include "SVGContentUtils.h"
  15
  16 namespace mozilla {
  17
  18 nsresult SVGNumberList::CopyFrom(const SVGNumberList& rhs) {
  19   if (!mNumbers.Assign(rhs.mNumbers, fallible)) {
  20     return NS_ERROR_OUT_OF_MEMORY;
  21   }
  22   return NS_OK;
  23 }
  24
  25 void SVGNumberList::GetValueAsString(nsAString& aValue) const {
  26   aValue.Truncate();
  27   char16_t buf[24];
  28   uint32_t last = mNumbers.Length() - 1;
  29   for (uint32_t i = 0; i < mNumbers.Length(); ++i) {
  30     // Would like to use aValue.AppendPrintf("%f", mNumbers[i]), but it's not
  31     // possible to always avoid trailing zeros.
  32     nsTextFormatter::snprintf(buf, std::size(buf), u"%g", double(mNumbers[i]));
  33     // We ignore OOM, since it's not useful for us to return an error.
  34     aValue.Append(buf);
  35     if (i != last) {
  36       aValue.Append(' ');
  37     }
  38   }
  39 }
  40
  41 nsresult SVGNumberList::SetValueFromString(const nsAString& aValue) {
  42   SVGNumberList temp;
  43
  44   nsCharSeparatedTokenizerTemplate<nsContentUtils::IsHTMLWhitespace,
  45                                    nsTokenizerFlags::SeparatorOptional>
  46       tokenizer(aValue, ',');
  47
  48   while (tokenizer.hasMoreTokens()) {
  49     float num;
  50     if (!SVGContentUtils::ParseNumber(tokenizer.nextToken(), num)) {
  51       return NS_ERROR_DOM_SYNTAX_ERR;
  52     }
  53     if (!temp.AppendItem(num)) {
  54       return NS_ERROR_OUT_OF_MEMORY;
  55     }
  56   }
  57   if (tokenizer.separatorAfterCurrentToken()) {
  58     return NS_ERROR_DOM_SYNTAX_ERR;  // trailing comma
  59   }
  60   mNumbers = std::move(temp.mNumbers);
  61   return NS_OK;
  62 }
  63
  64 }  // namespace mozilla