accessible/src/html/HTMLLinkAccessible.cpp@b8a032363ba2 (annotated)
accessible/src/html/HTMLLinkAccessible.cpp
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 3 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 4 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 5 | |
| michael@0 | 6 | #include "HTMLLinkAccessible.h" |
| michael@0 | 7 | |
| michael@0 | 8 | #include "nsCoreUtils.h" |
| michael@0 | 9 | #include "DocAccessible.h" |
| michael@0 | 10 | #include "Role.h" |
| michael@0 | 11 | #include "States.h" |
| michael@0 | 12 | |
| michael@0 | 13 | #include "nsContentUtils.h" |
| michael@0 | 14 | #include "mozilla/EventStates.h" |
| michael@0 | 15 | #include "mozilla/dom/Element.h" |
| michael@0 | 16 | |
| michael@0 | 17 | using namespace mozilla; |
| michael@0 | 18 | using namespace mozilla::a11y; |
| michael@0 | 19 | |
| michael@0 | 20 | //////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 21 | // HTMLLinkAccessible |
| michael@0 | 22 | //////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 23 | |
| michael@0 | 24 | HTMLLinkAccessible:: |
| michael@0 | 25 | HTMLLinkAccessible(nsIContent* aContent, DocAccessible* aDoc) : |
| michael@0 | 26 | HyperTextAccessibleWrap(aContent, aDoc) |
| michael@0 | 27 | { |
| michael@0 | 28 | } |
| michael@0 | 29 | |
| michael@0 | 30 | // Expose nsIAccessibleHyperLink unconditionally |
| michael@0 | 31 | NS_IMPL_ISUPPORTS_INHERITED(HTMLLinkAccessible, HyperTextAccessibleWrap, |
| michael@0 | 32 | nsIAccessibleHyperLink) |
| michael@0 | 33 | |
| michael@0 | 34 | //////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 35 | // nsIAccessible |
| michael@0 | 36 | |
| michael@0 | 37 | role |
| michael@0 | 38 | HTMLLinkAccessible::NativeRole() |
| michael@0 | 39 | { |
| michael@0 | 40 | return roles::LINK; |
| michael@0 | 41 | } |
| michael@0 | 42 | |
| michael@0 | 43 | uint64_t |
| michael@0 | 44 | HTMLLinkAccessible::NativeState() |
| michael@0 | 45 | { |
| michael@0 | 46 | return HyperTextAccessibleWrap::NativeState() & ~states::READONLY; |
| michael@0 | 47 | } |
| michael@0 | 48 | |
| michael@0 | 49 | uint64_t |
| michael@0 | 50 | HTMLLinkAccessible::NativeLinkState() const |
| michael@0 | 51 | { |
| michael@0 | 52 | EventStates eventState = mContent->AsElement()->State(); |
| michael@0 | 53 | if (eventState.HasState(NS_EVENT_STATE_UNVISITED)) |
| michael@0 | 54 | return states::LINKED; |
| michael@0 | 55 | |
| michael@0 | 56 | if (eventState.HasState(NS_EVENT_STATE_VISITED)) |
| michael@0 | 57 | return states::LINKED | states::TRAVERSED; |
| michael@0 | 58 | |
| michael@0 | 59 | // This is a either named anchor (a link with also a name attribute) or |
| michael@0 | 60 | // it doesn't have any attributes. Check if 'click' event handler is |
| michael@0 | 61 | // registered, otherwise bail out. |
| michael@0 | 62 | return nsCoreUtils::HasClickListener(mContent) ? states::LINKED : 0; |
| michael@0 | 63 | } |
| michael@0 | 64 | |
| michael@0 | 65 | uint64_t |
| michael@0 | 66 | HTMLLinkAccessible::NativeInteractiveState() const |
| michael@0 | 67 | { |
| michael@0 | 68 | uint64_t state = HyperTextAccessibleWrap::NativeInteractiveState(); |
| michael@0 | 69 | |
| michael@0 | 70 | // This is how we indicate it is a named anchor. In other words, this anchor |
| michael@0 | 71 | // can be selected as a location :) There is no other better state to use to |
| michael@0 | 72 | // indicate this. |
| michael@0 | 73 | if (mContent->HasAttr(kNameSpaceID_None, nsGkAtoms::name)) |
| michael@0 | 74 | state |= states::SELECTABLE; |
| michael@0 | 75 | |
| michael@0 | 76 | return state; |
| michael@0 | 77 | } |
| michael@0 | 78 | |
| michael@0 | 79 | void |
| michael@0 | 80 | HTMLLinkAccessible::Value(nsString& aValue) |
| michael@0 | 81 | { |
| michael@0 | 82 | aValue.Truncate(); |
| michael@0 | 83 | |
| michael@0 | 84 | HyperTextAccessible::Value(aValue); |
| michael@0 | 85 | if (aValue.IsEmpty()) |
| michael@0 | 86 | nsContentUtils::GetLinkLocation(mContent->AsElement(), aValue); |
| michael@0 | 87 | } |
| michael@0 | 88 | |
| michael@0 | 89 | uint8_t |
| michael@0 | 90 | HTMLLinkAccessible::ActionCount() |
| michael@0 | 91 | { |
| michael@0 | 92 | return IsLinked() ? 1 : HyperTextAccessible::ActionCount(); |
| michael@0 | 93 | } |
| michael@0 | 94 | |
| michael@0 | 95 | NS_IMETHODIMP |
| michael@0 | 96 | HTMLLinkAccessible::GetActionName(uint8_t aIndex, nsAString& aName) |
| michael@0 | 97 | { |
| michael@0 | 98 | aName.Truncate(); |
| michael@0 | 99 | |
| michael@0 | 100 | if (!IsLinked()) |
| michael@0 | 101 | return HyperTextAccessible::GetActionName(aIndex, aName); |
| michael@0 | 102 | |
| michael@0 | 103 | // Action 0 (default action): Jump to link |
| michael@0 | 104 | if (aIndex != eAction_Jump) |
| michael@0 | 105 | return NS_ERROR_INVALID_ARG; |
| michael@0 | 106 | |
| michael@0 | 107 | aName.AssignLiteral("jump"); |
| michael@0 | 108 | return NS_OK; |
| michael@0 | 109 | } |
| michael@0 | 110 | |
| michael@0 | 111 | NS_IMETHODIMP |
| michael@0 | 112 | HTMLLinkAccessible::DoAction(uint8_t aIndex) |
| michael@0 | 113 | { |
| michael@0 | 114 | if (!IsLinked()) |
| michael@0 | 115 | return HyperTextAccessible::DoAction(aIndex); |
| michael@0 | 116 | |
| michael@0 | 117 | // Action 0 (default action): Jump to link |
| michael@0 | 118 | if (aIndex != eAction_Jump) |
| michael@0 | 119 | return NS_ERROR_INVALID_ARG; |
| michael@0 | 120 | |
| michael@0 | 121 | if (IsDefunct()) |
| michael@0 | 122 | return NS_ERROR_FAILURE; |
| michael@0 | 123 | |
| michael@0 | 124 | DoCommand(); |
| michael@0 | 125 | return NS_OK; |
| michael@0 | 126 | } |
| michael@0 | 127 | |
| michael@0 | 128 | //////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 129 | // HyperLinkAccessible |
| michael@0 | 130 | |
| michael@0 | 131 | bool |
| michael@0 | 132 | HTMLLinkAccessible::IsLink() |
| michael@0 | 133 | { |
| michael@0 | 134 | // Expose HyperLinkAccessible unconditionally. |
| michael@0 | 135 | return true; |
| michael@0 | 136 | } |
| michael@0 | 137 | |
| michael@0 | 138 | already_AddRefed<nsIURI> |
| michael@0 | 139 | HTMLLinkAccessible::AnchorURIAt(uint32_t aAnchorIndex) |
| michael@0 | 140 | { |
| michael@0 | 141 | return aAnchorIndex == 0 ? mContent->GetHrefURI() : nullptr; |
| michael@0 | 142 | } |
| michael@0 | 143 | |
| michael@0 | 144 | //////////////////////////////////////////////////////////////////////////////// |
| michael@0 | 145 | // Protected members |
| michael@0 | 146 | |
| michael@0 | 147 | bool |
| michael@0 | 148 | HTMLLinkAccessible::IsLinked() |
| michael@0 | 149 | { |
| michael@0 | 150 | if (IsDefunct()) |
| michael@0 | 151 | return false; |
| michael@0 | 152 | |
| michael@0 | 153 | EventStates state = mContent->AsElement()->State(); |
| michael@0 | 154 | return state.HasAtLeastOneOfStates(NS_EVENT_STATE_VISITED | |
| michael@0 | 155 | NS_EVENT_STATE_UNVISITED); |
| michael@0 | 156 | } |
