Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 334 insertions, 0 deletions

diff --git a/accessible/base/ARIAStateMap.cpp b/accessible/base/ARIAStateMap.cpp
new file mode 100644
index 0000000000..6bf20cf1cc
--- /dev/null
+++ b/accessible/base/ARIAStateMap.cpp
@@ -0,0 +1,334 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "ARIAMap.h"
+#include "nsAccUtils.h"
+#include "States.h"
+
+#include "mozilla/dom/Element.h"
+
+using namespace mozilla;
+using namespace mozilla::a11y;
+using namespace mozilla::a11y::aria;
+
+/**
+ * Used to store state map rule data for ARIA attribute of enum type.
+ */
+struct EnumTypeData {
+  // ARIA attribute name.
+  nsStaticAtom* const mAttrName;
+
+  // States if the attribute value is matched to the enum value. Used as
+  // Element::AttrValuesArray, last item must be nullptr.
+  nsStaticAtom* const mValues[4];
+
+  // States applied if corresponding enum values are matched.
+  const uint64_t mStates[3];
+
+  // States to clear in case of match.
+  const uint64_t mClearState;
+};
+
+enum ETokenType {
+  eBoolType = 0,
+  eMixedType = 1,       // can take 'mixed' value
+  eDefinedIfAbsent = 2  // permanent and false state are applied if absent
+};
+
+/**
+ * Used to store state map rule data for ARIA attribute of token type (including
+ * mixed value).
+ */
+struct TokenTypeData {
+  TokenTypeData(nsAtom* aAttrName, uint32_t aType, uint64_t aPermanentState,
+                uint64_t aTrueState, uint64_t aFalseState = 0)
+      : mAttrName(aAttrName),
+        mType(aType),
+        mPermanentState(aPermanentState),
+        mTrueState(aTrueState),
+        mFalseState(aFalseState) {}
+
+  // ARIA attribute name.
+  nsAtom* const mAttrName;
+
+  // Type.
+  const uint32_t mType;
+
+  // State applied if the attribute is defined or mType doesn't have
+  // eDefinedIfAbsent flag set.
+  const uint64_t mPermanentState;
+
+  // States applied if the attribute value is true/false.
+  const uint64_t mTrueState;
+  const uint64_t mFalseState;
+};
+
+/**
+ * Map enum type attribute value to accessible state.
+ */
+static void MapEnumType(dom::Element* aElement, uint64_t* aState,
+                        const EnumTypeData& aData);
+
+/**
+ * Map token type attribute value to states.
+ */
+static void MapTokenType(dom::Element* aContent, uint64_t* aState,
+                         const TokenTypeData& aData);
+
+bool aria::MapToState(EStateRule aRule, dom::Element* aElement,
+                      uint64_t* aState) {
+  switch (aRule) {
+    case eARIAAutoComplete: {
+      static const EnumTypeData data = {
+          nsGkAtoms::aria_autocomplete,
+          {nsGkAtoms::inlinevalue, nsGkAtoms::list_, nsGkAtoms::both, nullptr},
+          {states::SUPPORTS_AUTOCOMPLETION,
+           states::HASPOPUP | states::SUPPORTS_AUTOCOMPLETION,
+           states::HASPOPUP | states::SUPPORTS_AUTOCOMPLETION},
+          0};
+
+      MapEnumType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIABusy: {
+      static const EnumTypeData data = {
+          nsGkAtoms::aria_busy,
+          {nsGkAtoms::_true, nsGkAtoms::error, nullptr},
+          {states::BUSY, states::INVALID},
+          0};
+
+      MapEnumType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIACheckableBool: {
+      static const TokenTypeData data(nsGkAtoms::aria_checked,
+                                      eBoolType | eDefinedIfAbsent,
+                                      states::CHECKABLE, states::CHECKED);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIACheckableMixed: {
+      static const TokenTypeData data(nsGkAtoms::aria_checked,
+                                      eMixedType | eDefinedIfAbsent,
+                                      states::CHECKABLE, states::CHECKED);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIACheckedMixed: {
+      static const TokenTypeData data(nsGkAtoms::aria_checked, eMixedType,
+                                      states::CHECKABLE, states::CHECKED);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIACurrent: {
+      static const TokenTypeData data(nsGkAtoms::aria_current, eBoolType, 0,
+                                      states::CURRENT);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIADisabled: {
+      static const TokenTypeData data(nsGkAtoms::aria_disabled, eBoolType, 0,
+                                      states::UNAVAILABLE);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAExpanded: {
+      static const TokenTypeData data(nsGkAtoms::aria_expanded, eBoolType, 0,
+                                      states::EXPANDED, states::COLLAPSED);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAHasPopup: {
+      static const TokenTypeData data(nsGkAtoms::aria_haspopup, eBoolType, 0,
+                                      states::HASPOPUP);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAInvalid: {
+      static const TokenTypeData data(nsGkAtoms::aria_invalid, eBoolType, 0,
+                                      states::INVALID);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAModal: {
+      static const TokenTypeData data(nsGkAtoms::aria_modal, eBoolType, 0,
+                                      states::MODAL);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAMultiline: {
+      static const TokenTypeData data(nsGkAtoms::aria_multiline,
+                                      eBoolType | eDefinedIfAbsent, 0,
+                                      states::MULTI_LINE, states::SINGLE_LINE);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAMultiSelectable: {
+      static const TokenTypeData data(
+          nsGkAtoms::aria_multiselectable, eBoolType, 0,
+          states::MULTISELECTABLE | states::EXTSELECTABLE);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAOrientation: {
+      static const EnumTypeData data = {
+          nsGkAtoms::aria_orientation,
+          {nsGkAtoms::horizontal, nsGkAtoms::vertical, nullptr},
+          {states::HORIZONTAL, states::VERTICAL},
+          states::HORIZONTAL | states::VERTICAL};
+
+      MapEnumType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAPressed: {
+      static const TokenTypeData data(nsGkAtoms::aria_pressed, eMixedType, 0,
+                                      states::PRESSED);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAReadonly: {
+      static const TokenTypeData data(nsGkAtoms::aria_readonly, eBoolType, 0,
+                                      states::READONLY);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIAReadonlyOrEditable: {
+      static const TokenTypeData data(nsGkAtoms::aria_readonly,
+                                      eBoolType | eDefinedIfAbsent, 0,
+                                      states::READONLY, states::EDITABLE);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIARequired: {
+      static const TokenTypeData data(nsGkAtoms::aria_required, eBoolType, 0,
+                                      states::REQUIRED);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIASelectable: {
+      static const TokenTypeData data(nsGkAtoms::aria_selected,
+                                      eBoolType | eDefinedIfAbsent,
+                                      states::SELECTABLE, states::SELECTED);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eARIASelectableIfDefined: {
+      static const TokenTypeData data(nsGkAtoms::aria_selected, eBoolType,
+                                      states::SELECTABLE, states::SELECTED);
+
+      MapTokenType(aElement, aState, data);
+      return true;
+    }
+
+    case eReadonlyUntilEditable: {
+      if (!(*aState & states::EDITABLE)) *aState |= states::READONLY;
+
+      return true;
+    }
+
+    case eIndeterminateIfNoValue: {
+      if (!nsAccUtils::HasARIAAttr(aElement, nsGkAtoms::aria_valuenow) &&
+          !nsAccUtils::HasARIAAttr(aElement, nsGkAtoms::aria_valuetext)) {
+        *aState |= states::MIXED;
+      }
+
+      return true;
+    }
+
+    case eFocusableUntilDisabled: {
+      if (!nsAccUtils::HasDefinedARIAToken(aElement,
+                                           nsGkAtoms::aria_disabled) ||
+          nsAccUtils::ARIAAttrValueIs(aElement, nsGkAtoms::aria_disabled,
+                                      nsGkAtoms::_false, eCaseMatters)) {
+        *aState |= states::FOCUSABLE;
+      }
+
+      return true;
+    }
+
+    default:
+      return false;
+  }
+}
+
+static void MapEnumType(dom::Element* aElement, uint64_t* aState,
+                        const EnumTypeData& aData) {
+  switch (nsAccUtils::FindARIAAttrValueIn(aElement, aData.mAttrName,
+                                          aData.mValues, eCaseMatters)) {
+    case 0:
+      *aState = (*aState & ~aData.mClearState) | aData.mStates[0];
+      return;
+    case 1:
+      *aState = (*aState & ~aData.mClearState) | aData.mStates[1];
+      return;
+    case 2:
+      *aState = (*aState & ~aData.mClearState) | aData.mStates[2];
+      return;
+  }
+}
+
+static void MapTokenType(dom::Element* aElement, uint64_t* aState,
+                         const TokenTypeData& aData) {
+  if (nsAccUtils::HasDefinedARIAToken(aElement, aData.mAttrName)) {
+    if (nsAccUtils::ARIAAttrValueIs(aElement, aData.mAttrName, nsGkAtoms::mixed,
+                                    eCaseMatters)) {
+      if (aData.mType & eMixedType) {
+        *aState |= aData.mPermanentState | states::MIXED;
+      } else {  // unsupported use of 'mixed' is an authoring error
+        *aState |= aData.mPermanentState | aData.mFalseState;
+      }
+      return;
+    }
+
+    if (nsAccUtils::ARIAAttrValueIs(aElement, aData.mAttrName,
+                                    nsGkAtoms::_false, eCaseMatters)) {
+      *aState |= aData.mPermanentState | aData.mFalseState;
+      return;
+    }
+
+    *aState |= aData.mPermanentState | aData.mTrueState;
+    return;
+  }
+
+  if (aData.mType & eDefinedIfAbsent) {
+    *aState |= aData.mPermanentState | aData.mFalseState;
+  }
+}