The Tor Browser / file comparison
comparison: accessible/src/generic/ImageAccessible.cpp
accessible/src/generic/ImageAccessible.cpp
- branch
- TOR_BUG_9701
- changeset 3
- 141e0f1194b1
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| -1:000000000000 | 0:b198f8610c5d |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "ImageAccessible.h" | |
| 7 | |
| 8 #include "nsAccUtils.h" | |
| 9 #include "Role.h" | |
| 10 #include "AccIterator.h" | |
| 11 #include "States.h" | |
| 12 | |
| 13 #include "imgIContainer.h" | |
| 14 #include "imgIRequest.h" | |
| 15 #include "nsGenericHTMLElement.h" | |
| 16 #include "nsIDocument.h" | |
| 17 #include "nsIImageLoadingContent.h" | |
| 18 #include "nsIPresShell.h" | |
| 19 #include "nsIServiceManager.h" | |
| 20 #include "nsIDOMHTMLImageElement.h" | |
| 21 #include "nsIPersistentProperties2.h" | |
| 22 #include "nsPIDOMWindow.h" | |
| 23 #include "nsIURI.h" | |
| 24 | |
| 25 using namespace mozilla::a11y; | |
| 26 | |
| 27 //////////////////////////////////////////////////////////////////////////////// | |
| 28 // ImageAccessible | |
| 29 //////////////////////////////////////////////////////////////////////////////// | |
| 30 | |
| 31 ImageAccessible:: | |
| 32 ImageAccessible(nsIContent* aContent, DocAccessible* aDoc) : | |
| 33 LinkableAccessible(aContent, aDoc) | |
| 34 { | |
| 35 mType = eImageType; | |
| 36 } | |
| 37 | |
| 38 NS_IMPL_ISUPPORTS_INHERITED(ImageAccessible, Accessible, | |
| 39 nsIAccessibleImage) | |
| 40 | |
| 41 //////////////////////////////////////////////////////////////////////////////// | |
| 42 // Accessible public | |
| 43 | |
| 44 uint64_t | |
| 45 ImageAccessible::NativeState() | |
| 46 { | |
| 47 // The state is a bitfield, get our inherited state, then logically OR it with | |
| 48 // states::ANIMATED if this is an animated image. | |
| 49 | |
| 50 uint64_t state = LinkableAccessible::NativeState(); | |
| 51 | |
| 52 nsCOMPtr<nsIImageLoadingContent> content(do_QueryInterface(mContent)); | |
| 53 nsCOMPtr<imgIRequest> imageRequest; | |
| 54 | |
| 55 if (content) | |
| 56 content->GetRequest(nsIImageLoadingContent::CURRENT_REQUEST, | |
| 57 getter_AddRefs(imageRequest)); | |
| 58 | |
| 59 nsCOMPtr<imgIContainer> imgContainer; | |
| 60 if (imageRequest) | |
| 61 imageRequest->GetImage(getter_AddRefs(imgContainer)); | |
| 62 | |
| 63 if (imgContainer) { | |
| 64 bool animated; | |
| 65 imgContainer->GetAnimated(&animated); | |
| 66 if (animated) | |
| 67 state |= states::ANIMATED; | |
| 68 } | |
| 69 | |
| 70 return state; | |
| 71 } | |
| 72 | |
| 73 ENameValueFlag | |
| 74 ImageAccessible::NativeName(nsString& aName) | |
| 75 { | |
| 76 bool hasAltAttrib = | |
| 77 mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::alt, aName); | |
| 78 if (!aName.IsEmpty()) | |
| 79 return eNameOK; | |
| 80 | |
| 81 ENameValueFlag nameFlag = Accessible::NativeName(aName); | |
| 82 if (!aName.IsEmpty()) | |
| 83 return nameFlag; | |
| 84 | |
| 85 // No accessible name but empty 'alt' attribute is present. If further name | |
| 86 // computation algorithm doesn't provide non empty name then it means | |
| 87 // an empty 'alt' attribute was used to indicate a decorative image (see | |
| 88 // Accessible::Name() method for details). | |
| 89 return hasAltAttrib ? eNoNameOnPurpose : eNameOK; | |
| 90 } | |
| 91 | |
| 92 role | |
| 93 ImageAccessible::NativeRole() | |
| 94 { | |
| 95 return roles::GRAPHIC; | |
| 96 } | |
| 97 | |
| 98 //////////////////////////////////////////////////////////////////////////////// | |
| 99 // nsIAccessible | |
| 100 | |
| 101 uint8_t | |
| 102 ImageAccessible::ActionCount() | |
| 103 { | |
| 104 uint8_t actionCount = LinkableAccessible::ActionCount(); | |
| 105 return HasLongDesc() ? actionCount + 1 : actionCount; | |
| 106 } | |
| 107 | |
| 108 NS_IMETHODIMP | |
| 109 ImageAccessible::GetActionName(uint8_t aIndex, nsAString& aName) | |
| 110 { | |
| 111 aName.Truncate(); | |
| 112 | |
| 113 if (IsDefunct()) | |
| 114 return NS_ERROR_FAILURE; | |
| 115 | |
| 116 if (IsLongDescIndex(aIndex) && HasLongDesc()) { | |
| 117 aName.AssignLiteral("showlongdesc"); | |
| 118 return NS_OK; | |
| 119 } | |
| 120 return LinkableAccessible::GetActionName(aIndex, aName); | |
| 121 } | |
| 122 | |
| 123 NS_IMETHODIMP | |
| 124 ImageAccessible::DoAction(uint8_t aIndex) | |
| 125 { | |
| 126 if (IsDefunct()) | |
| 127 return NS_ERROR_FAILURE; | |
| 128 | |
| 129 // Get the long description uri and open in a new window. | |
| 130 if (!IsLongDescIndex(aIndex)) | |
| 131 return LinkableAccessible::DoAction(aIndex); | |
| 132 | |
| 133 nsCOMPtr<nsIURI> uri = GetLongDescURI(); | |
| 134 if (!uri) | |
| 135 return NS_ERROR_INVALID_ARG; | |
| 136 | |
| 137 nsAutoCString utf8spec; | |
| 138 uri->GetSpec(utf8spec); | |
| 139 NS_ConvertUTF8toUTF16 spec(utf8spec); | |
| 140 | |
| 141 nsIDocument* document = mContent->OwnerDoc(); | |
| 142 nsCOMPtr<nsPIDOMWindow> piWindow = document->GetWindow(); | |
| 143 nsCOMPtr<nsIDOMWindow> win = do_QueryInterface(piWindow); | |
| 144 NS_ENSURE_STATE(win); | |
| 145 | |
| 146 nsCOMPtr<nsIDOMWindow> tmp; | |
| 147 return win->Open(spec, EmptyString(), EmptyString(), | |
| 148 getter_AddRefs(tmp)); | |
| 149 } | |
| 150 | |
| 151 //////////////////////////////////////////////////////////////////////////////// | |
| 152 // nsIAccessibleImage | |
| 153 | |
| 154 NS_IMETHODIMP | |
| 155 ImageAccessible::GetImagePosition(uint32_t aCoordType, int32_t* aX, int32_t* aY) | |
| 156 { | |
| 157 int32_t width, height; | |
| 158 nsresult rv = GetBounds(aX, aY, &width, &height); | |
| 159 if (NS_FAILED(rv)) | |
| 160 return rv; | |
| 161 | |
| 162 nsAccUtils::ConvertScreenCoordsTo(aX, aY, aCoordType, this); | |
| 163 return NS_OK; | |
| 164 } | |
| 165 | |
| 166 NS_IMETHODIMP | |
| 167 ImageAccessible::GetImageSize(int32_t* aWidth, int32_t* aHeight) | |
| 168 { | |
| 169 int32_t x, y; | |
| 170 return GetBounds(&x, &y, aWidth, aHeight); | |
| 171 } | |
| 172 | |
| 173 // Accessible | |
| 174 already_AddRefed<nsIPersistentProperties> | |
| 175 ImageAccessible::NativeAttributes() | |
| 176 { | |
| 177 nsCOMPtr<nsIPersistentProperties> attributes = | |
| 178 LinkableAccessible::NativeAttributes(); | |
| 179 | |
| 180 nsAutoString src; | |
| 181 mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::src, src); | |
| 182 if (!src.IsEmpty()) | |
| 183 nsAccUtils::SetAccAttr(attributes, nsGkAtoms::src, src); | |
| 184 | |
| 185 return attributes.forget(); | |
| 186 } | |
| 187 | |
| 188 //////////////////////////////////////////////////////////////////////////////// | |
| 189 // Private methods | |
| 190 | |
| 191 already_AddRefed<nsIURI> | |
| 192 ImageAccessible::GetLongDescURI() const | |
| 193 { | |
| 194 if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::longdesc)) { | |
| 195 nsGenericHTMLElement* element = | |
| 196 nsGenericHTMLElement::FromContent(mContent); | |
| 197 if (element) { | |
| 198 nsCOMPtr<nsIURI> uri; | |
| 199 element->GetURIAttr(nsGkAtoms::longdesc, nullptr, getter_AddRefs(uri)); | |
| 200 return uri.forget(); | |
| 201 } | |
| 202 } | |
| 203 | |
| 204 DocAccessible* document = Document(); | |
| 205 if (document) { | |
| 206 IDRefsIterator iter(document, mContent, nsGkAtoms::aria_describedby); | |
| 207 while (nsIContent* target = iter.NextElem()) { | |
| 208 if ((target->IsHTML(nsGkAtoms::a) || target->IsHTML(nsGkAtoms::area)) && | |
| 209 target->HasAttr(kNameSpaceID_None, nsGkAtoms::href)) { | |
| 210 nsGenericHTMLElement* element = | |
| 211 nsGenericHTMLElement::FromContent(target); | |
| 212 | |
| 213 nsCOMPtr<nsIURI> uri; | |
| 214 element->GetURIAttr(nsGkAtoms::href, nullptr, getter_AddRefs(uri)); | |
| 215 return uri.forget(); | |
| 216 } | |
| 217 } | |
| 218 } | |
| 219 | |
| 220 return nullptr; | |
| 221 } | |
| 222 | |
| 223 bool | |
| 224 ImageAccessible::IsLongDescIndex(uint8_t aIndex) | |
| 225 { | |
| 226 return aIndex == LinkableAccessible::ActionCount(); | |
| 227 } | |
| 228 |
