dom/svg/SVGTransformList.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 "SVGTransformList.h"
   8 #include "SVGTransformListParser.h"
   9 #include "nsString.h"
  10 #include "nsError.h"
  11
  12 namespace mozilla {
  13
  14 gfxMatrix
  15 SVGTransformList::GetConsolidationMatrix() const
  16 {
  17   // To benefit from Return Value Optimization and avoid copy constructor calls
  18   // due to our use of return-by-value, we must return the exact same object
  19   // from ALL return points. This function must only return THIS variable:
  20   gfxMatrix result;
  21
  22   if (mItems.IsEmpty())
  23     return result;
  24
  25   result = mItems[0].GetMatrix();
  26
  27   if (mItems.Length() == 1)
  28     return result;
  29
  30   for (uint32_t i = 1; i < mItems.Length(); ++i) {
  31     result.PreMultiply(mItems[i].GetMatrix());
  32   }
  33
  34   return result;
  35 }
  36
  37 nsresult
  38 SVGTransformList::CopyFrom(const SVGTransformList& rhs)
  39 {
  40   return CopyFrom(rhs.mItems);
  41 }
  42
  43 nsresult
  44 SVGTransformList::CopyFrom(const nsTArray<nsSVGTransform>& aTransformArray)
  45 {
  46   if (!mItems.Assign(aTransformArray, fallible)) {
  47     return NS_ERROR_OUT_OF_MEMORY;
  48   }
  49   return NS_OK;
  50 }
  51
  52 void
  53 SVGTransformList::GetValueAsString(nsAString& aValue) const
  54 {
  55   aValue.Truncate();
  56   uint32_t last = mItems.Length() - 1;
  57   for (uint32_t i = 0; i < mItems.Length(); ++i) {
  58     nsAutoString length;
  59     mItems[i].GetValueAsString(length);
  60     // We ignore OOM, since it's not useful for us to return an error.
  61     aValue.Append(length);
  62     if (i != last) {
  63       aValue.Append(' ');
  64     }
  65   }
  66 }
  67
  68 nsresult
  69 SVGTransformList::SetValueFromString(const nsAString& aValue)
  70 {
  71   SVGTransformListParser parser(aValue);
  72   if (!parser.Parse()) {
  73     // there was a parse error.
  74     return NS_ERROR_DOM_SYNTAX_ERR;
  75   }
  76
  77   return CopyFrom(parser.GetTransformList());
  78 }
  79
  80 } // namespace mozilla