dom/svg/SVGPreserveAspectRatio.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 "SVGPreserveAspectRatio.h"
   8
   9 #include "mozilla/dom/SVGPreserveAspectRatioBinding.h"
  10 #include "nsContentUtils.h"
  11 #include "nsWhitespaceTokenizer.h"
  12 #include "SVGAnimatedPreserveAspectRatio.h"
  13
  14 using namespace mozilla;
  15 using namespace dom;
  16 using namespace SVGPreserveAspectRatio_Binding;
  17
  18 NS_SVG_VAL_IMPL_CYCLE_COLLECTION_WRAPPERCACHED(DOMSVGPreserveAspectRatio, mSVGElement)
  19
  20 NS_IMPL_CYCLE_COLLECTING_ADDREF(DOMSVGPreserveAspectRatio)
  21 NS_IMPL_CYCLE_COLLECTING_RELEASE(DOMSVGPreserveAspectRatio)
  22
  23 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(DOMSVGPreserveAspectRatio)
  24   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  25   NS_INTERFACE_MAP_ENTRY(nsISupports)
  26 NS_INTERFACE_MAP_END
  27
  28 static const char *sAlignStrings[] =
  29   { "none", "xMinYMin", "xMidYMin", "xMaxYMin", "xMinYMid", "xMidYMid",
  30     "xMaxYMid", "xMinYMax", "xMidYMax", "xMaxYMax" };
  31
  32 static const char *sMeetOrSliceStrings[] = { "meet", "slice" };
  33
  34 static uint16_t
  35 GetAlignForString(const nsAString &aAlignString)
  36 {
  37   for (uint32_t i = 0 ; i < ArrayLength(sAlignStrings) ; i++) {
  38     if (aAlignString.EqualsASCII(sAlignStrings[i])) {
  39       return (i + SVG_ALIGN_MIN_VALID);
  40     }
  41   }
  42
  43   return SVG_PRESERVEASPECTRATIO_UNKNOWN;
  44 }
  45
  46 static uint16_t
  47 GetMeetOrSliceForString(const nsAString &aMeetOrSlice)
  48 {
  49   for (uint32_t i = 0 ; i < ArrayLength(sMeetOrSliceStrings) ; i++) {
  50     if (aMeetOrSlice.EqualsASCII(sMeetOrSliceStrings[i])) {
  51       return (i + SVG_MEETORSLICE_MIN_VALID);
  52     }
  53   }
  54
  55   return SVG_MEETORSLICE_UNKNOWN;
  56 }
  57
  58 /* static */ nsresult
  59 SVGPreserveAspectRatio::FromString(const nsAString& aString,
  60                                    SVGPreserveAspectRatio* aValue)
  61 {
  62   nsWhitespaceTokenizerTemplate<nsContentUtils::IsHTMLWhitespace>
  63     tokenizer(aString);
  64   if (tokenizer.whitespaceBeforeFirstToken() ||
  65       !tokenizer.hasMoreTokens()) {
  66     return NS_ERROR_DOM_SYNTAX_ERR;
  67   }
  68   const nsAString &token = tokenizer.nextToken();
  69
  70   nsresult rv;
  71   SVGPreserveAspectRatio val;
  72
  73   rv = val.SetAlign(GetAlignForString(token));
  74
  75   if (NS_FAILED(rv)) {
  76     return NS_ERROR_DOM_SYNTAX_ERR;
  77   }
  78
  79   if (tokenizer.hasMoreTokens()) {
  80     rv = val.SetMeetOrSlice(GetMeetOrSliceForString(tokenizer.nextToken()));
  81     if (NS_FAILED(rv)) {
  82       return NS_ERROR_DOM_SYNTAX_ERR;
  83     }
  84   } else {
  85     val.SetMeetOrSlice(SVG_MEETORSLICE_MEET);
  86   }
  87
  88   if (tokenizer.whitespaceAfterCurrentToken()) {
  89     return NS_ERROR_DOM_SYNTAX_ERR;
  90   }
  91
  92   *aValue = val;
  93   return NS_OK;
  94 }
  95
  96 void
  97 SVGPreserveAspectRatio::ToString(nsAString& aValueAsString) const
  98 {
  99   MOZ_ASSERT(mAlign >= SVG_ALIGN_MIN_VALID && mAlign <= SVG_ALIGN_MAX_VALID,
 100              "Unknown align");
 101   aValueAsString.AssignASCII(sAlignStrings[mAlign - SVG_ALIGN_MIN_VALID]);
 102
 103   if (mAlign != uint8_t(SVG_PRESERVEASPECTRATIO_NONE)) {
 104     MOZ_ASSERT(mMeetOrSlice >= SVG_MEETORSLICE_MIN_VALID &&
 105                mMeetOrSlice <= SVG_MEETORSLICE_MAX_VALID,
 106                "Unknown meetOrSlice");
 107     aValueAsString.Append(' ');
 108     aValueAsString.AppendASCII(sMeetOrSliceStrings[mMeetOrSlice - SVG_MEETORSLICE_MIN_VALID]);
 109   }
 110 }
 111
 112 bool
 113 SVGPreserveAspectRatio::operator==(const SVGPreserveAspectRatio& aOther) const
 114 {
 115   return mAlign == aOther.mAlign &&
 116     mMeetOrSlice == aOther.mMeetOrSlice;
 117 }
 118
 119 JSObject*
 120 DOMSVGPreserveAspectRatio::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
 121 {
 122   return mozilla::dom::SVGPreserveAspectRatio_Binding::Wrap(aCx, this, aGivenProto);
 123 }
 124
 125 uint16_t
 126 DOMSVGPreserveAspectRatio::Align()
 127 {
 128   if (mIsBaseValue) {
 129     return mVal->GetBaseValue().GetAlign();
 130   }
 131
 132   mSVGElement->FlushAnimations();
 133   return mVal->GetAnimValue().GetAlign();
 134 }
 135
 136 void
 137 DOMSVGPreserveAspectRatio::SetAlign(uint16_t aAlign, ErrorResult& rv)
 138 {
 139   if (!mIsBaseValue) {
 140     rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
 141     return;
 142   }
 143   rv = mVal->SetBaseAlign(aAlign, mSVGElement);
 144 }
 145
 146 uint16_t
 147 DOMSVGPreserveAspectRatio::MeetOrSlice()
 148 {
 149   if (mIsBaseValue) {
 150     return mVal->GetBaseValue().GetMeetOrSlice();
 151   }
 152
 153   mSVGElement->FlushAnimations();
 154   return mVal->GetAnimValue().GetMeetOrSlice();
 155 }
 156
 157 void
 158 DOMSVGPreserveAspectRatio::SetMeetOrSlice(uint16_t aMeetOrSlice, ErrorResult& rv)
 159 {
 160   if (!mIsBaseValue) {
 161     rv.Throw(NS_ERROR_DOM_NO_MODIFICATION_ALLOWED_ERR);
 162     return;
 163   }
 164   rv = mVal->SetBaseMeetOrSlice(aMeetOrSlice, mSVGElement);
 165 }
 166