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