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Diffstat (limited to 'accessible/html/HTMLFormControlAccessible.cpp')
| -rw-r--r-- | accessible/html/HTMLFormControlAccessible.cpp | 979 |
1 files changed, 979 insertions, 0 deletions
diff --git a/accessible/html/HTMLFormControlAccessible.cpp b/accessible/html/HTMLFormControlAccessible.cpp new file mode 100644 index 0000000000..95d6fed7b3 --- /dev/null +++ b/accessible/html/HTMLFormControlAccessible.cpp @@ -0,0 +1,979 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* 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 "HTMLFormControlAccessible.h" + +#include "CacheConstants.h" +#include "DocAccessible-inl.h" +#include "LocalAccessible-inl.h" +#include "nsAccUtils.h" +#include "nsEventShell.h" +#include "nsTextEquivUtils.h" +#include "Relation.h" +#include "mozilla/a11y/Role.h" +#include "States.h" +#include "TextLeafAccessible.h" + +#include "nsContentList.h" +#include "mozilla/dom/HTMLInputElement.h" +#include "mozilla/dom/HTMLTextAreaElement.h" +#include "mozilla/dom/HTMLFormControlsCollection.h" +#include "nsIFormControl.h" + +#include "mozilla/FloatingPoint.h" +#include "mozilla/Preferences.h" +#include "mozilla/TextEditor.h" + +using namespace mozilla; +using namespace mozilla::dom; +using namespace mozilla::a11y; + +//////////////////////////////////////////////////////////////////////////////// +// HTMLFormAccessible +//////////////////////////////////////////////////////////////////////////////// + +role HTMLFormAccessible::NativeRole() const { + nsAutoString name; + const_cast<HTMLFormAccessible*>(this)->Name(name); + return name.IsEmpty() ? roles::FORM : roles::FORM_LANDMARK; +} + +void HTMLFormAccessible::DOMAttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType, + const nsAttrValue* aOldValue, + uint64_t aOldState) { + HyperTextAccessible::DOMAttributeChanged(aNameSpaceID, aAttribute, aModType, + aOldValue, aOldState); + if (aAttribute == nsGkAtoms::autocomplete) { + dom::HTMLFormElement* formEl = dom::HTMLFormElement::FromNode(mContent); + + HTMLFormControlsCollection* controls = formEl->Elements(); + uint32_t length = controls->Length(); + for (uint32_t i = 0; i < length; i++) { + if (LocalAccessible* acc = mDoc->GetAccessible(controls->Item(i))) { + if (acc->IsTextField() && !acc->IsPassword()) { + if (!acc->Elm()->HasAttr(nsGkAtoms::list_) && + !acc->Elm()->AttrValueIs(kNameSpaceID_None, + nsGkAtoms::autocomplete, nsGkAtoms::OFF, + eIgnoreCase)) { + RefPtr<AccEvent> stateChangeEvent = + new AccStateChangeEvent(acc, states::SUPPORTS_AUTOCOMPLETION); + mDoc->FireDelayedEvent(stateChangeEvent); + } + } + } + } + } +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLRadioButtonAccessible +//////////////////////////////////////////////////////////////////////////////// + +uint64_t HTMLRadioButtonAccessible::NativeState() const { + uint64_t state = AccessibleWrap::NativeState(); + + state |= states::CHECKABLE; + + HTMLInputElement* input = HTMLInputElement::FromNode(mContent); + if (input && input->Checked()) state |= states::CHECKED; + + return state; +} + +void HTMLRadioButtonAccessible::GetPositionAndSetSize(int32_t* aPosInSet, + int32_t* aSetSize) { + Unused << ComputeGroupAttributes(aPosInSet, aSetSize); +} + +void HTMLRadioButtonAccessible::DOMAttributeChanged( + int32_t aNameSpaceID, nsAtom* aAttribute, int32_t aModType, + const nsAttrValue* aOldValue, uint64_t aOldState) { + if (aAttribute == nsGkAtoms::name) { + // If our name changed, it's possible our MEMBER_OF relation + // also changed. Push a cache update for Relations. + mDoc->QueueCacheUpdate(this, CacheDomain::Relations); + } else { + // Otherwise, handle this attribute change the way our parent + // class wants us to handle it. + RadioButtonAccessible::DOMAttributeChanged(aNameSpaceID, aAttribute, + aModType, aOldValue, aOldState); + } +} + +Relation HTMLRadioButtonAccessible::ComputeGroupAttributes( + int32_t* aPosInSet, int32_t* aSetSize) const { + Relation rel = Relation(); + int32_t namespaceId = mContent->NodeInfo()->NamespaceID(); + nsAutoString tagName; + mContent->NodeInfo()->GetName(tagName); + + nsAutoString type; + mContent->AsElement()->GetAttr(nsGkAtoms::type, type); + nsAutoString name; + mContent->AsElement()->GetAttr(nsGkAtoms::name, name); + + RefPtr<nsContentList> inputElms; + + nsCOMPtr<nsIFormControl> formControlNode(do_QueryInterface(mContent)); + if (dom::Element* formElm = formControlNode->GetForm()) { + inputElms = NS_GetContentList(formElm, namespaceId, tagName); + } else { + inputElms = NS_GetContentList(mContent->OwnerDoc(), namespaceId, tagName); + } + NS_ENSURE_TRUE(inputElms, rel); + + uint32_t inputCount = inputElms->Length(false); + + // Compute posinset and setsize. + int32_t indexOf = 0; + int32_t count = 0; + + for (uint32_t index = 0; index < inputCount; index++) { + nsIContent* inputElm = inputElms->Item(index, false); + if (inputElm->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type, + type, eCaseMatters) && + inputElm->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::name, + name, eCaseMatters) && + mDoc->HasAccessible(inputElm)) { + count++; + rel.AppendTarget(mDoc->GetAccessible(inputElm)); + if (inputElm == mContent) indexOf = count; + } + } + + *aPosInSet = indexOf; + *aSetSize = count; + return rel; +} + +Relation HTMLRadioButtonAccessible::RelationByType(RelationType aType) const { + if (aType == RelationType::MEMBER_OF) { + int32_t unusedPos, unusedSetSize; + return ComputeGroupAttributes(&unusedPos, &unusedSetSize); + } + + return LocalAccessible::RelationByType(aType); +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLButtonAccessible +//////////////////////////////////////////////////////////////////////////////// + +HTMLButtonAccessible::HTMLButtonAccessible(nsIContent* aContent, + DocAccessible* aDoc) + : HyperTextAccessible(aContent, aDoc) { + mGenericTypes |= eButton; +} + +bool HTMLButtonAccessible::HasPrimaryAction() const { return true; } + +void HTMLButtonAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) { + if (aIndex == eAction_Click) aName.AssignLiteral("press"); +} + +uint64_t HTMLButtonAccessible::NativeState() const { + uint64_t state = HyperTextAccessible::NativeState(); + + dom::Element* elm = Elm(); + if (auto* popover = elm->GetEffectivePopoverTargetElement()) { + LocalAccessible* popoverAcc = mDoc->GetAccessible(popover); + if (!popoverAcc || !popoverAcc->IsAncestorOf(this)) { + if (popover->IsPopoverOpen()) { + state |= states::EXPANDED; + } else { + state |= states::COLLAPSED; + } + } + } + + ElementState elmState = mContent->AsElement()->State(); + if (elmState.HasState(ElementState::DEFAULT)) state |= states::DEFAULT; + + return state; +} + +role HTMLButtonAccessible::NativeRole() const { return roles::PUSHBUTTON; } + +ENameValueFlag HTMLButtonAccessible::NativeName(nsString& aName) const { + // No need to check @value attribute for buttons since this attribute results + // in native anonymous text node and the name is calculated from subtree. + // The same magic works for @alt and @value attributes in case of type="image" + // element that has no valid @src (note if input@type="image" has an image + // then neither @alt nor @value attributes are used to generate a visual label + // and thus we need to obtain the accessible name directly from attribute + // value). Also the same algorithm works in case of default labels for + // type="submit"/"reset"/"image" elements. + + ENameValueFlag nameFlag = LocalAccessible::NativeName(aName); + if (!aName.IsEmpty() || !mContent->IsHTMLElement(nsGkAtoms::input) || + !mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type, + nsGkAtoms::image, eCaseMatters)) { + return nameFlag; + } + + if (!mContent->AsElement()->GetAttr(nsGkAtoms::alt, aName)) { + mContent->AsElement()->GetAttr(nsGkAtoms::value, aName); + } + + aName.CompressWhitespace(); + return eNameOK; +} + +void HTMLButtonAccessible::DOMAttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType, + const nsAttrValue* aOldValue, + uint64_t aOldState) { + HyperTextAccessible::DOMAttributeChanged(aNameSpaceID, aAttribute, aModType, + aOldValue, aOldState); + + if (aAttribute == nsGkAtoms::value) { + dom::Element* elm = Elm(); + if (elm->IsHTMLElement(nsGkAtoms::input) || + (elm->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type, nsGkAtoms::image, + eCaseMatters) && + !elm->HasAttr(nsGkAtoms::alt))) { + if (!nsAccUtils::HasARIAAttr(elm, nsGkAtoms::aria_labelledby) && + !nsAccUtils::HasARIAAttr(elm, nsGkAtoms::aria_label)) { + mDoc->FireDelayedEvent(nsIAccessibleEvent::EVENT_NAME_CHANGE, this); + } + } + } +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLButtonAccessible: Widgets + +bool HTMLButtonAccessible::IsWidget() const { return true; } + +//////////////////////////////////////////////////////////////////////////////// +// HTMLTextFieldAccessible +//////////////////////////////////////////////////////////////////////////////// + +HTMLTextFieldAccessible::HTMLTextFieldAccessible(nsIContent* aContent, + DocAccessible* aDoc) + : HyperTextAccessible(aContent, aDoc) { + mType = mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type, + nsGkAtoms::password, eIgnoreCase) + ? eHTMLTextPasswordFieldType + : eHTMLTextFieldType; +} + +role HTMLTextFieldAccessible::NativeRole() const { + if (mType == eHTMLTextPasswordFieldType) { + return roles::PASSWORD_TEXT; + } + if (mContent->AsElement()->HasAttr(nsGkAtoms::list_)) { + return roles::EDITCOMBOBOX; + } + return roles::ENTRY; +} + +already_AddRefed<AccAttributes> HTMLTextFieldAccessible::NativeAttributes() { + RefPtr<AccAttributes> attributes = HyperTextAccessible::NativeAttributes(); + + // Expose type for text input elements as it gives some useful context, + // especially for mobile. + if (const nsAttrValue* attr = + mContent->AsElement()->GetParsedAttr(nsGkAtoms::type)) { + RefPtr<nsAtom> inputType = attr->GetAsAtom(); + if (inputType) { + if (!ARIARoleMap() && inputType == nsGkAtoms::search) { + attributes->SetAttribute(nsGkAtoms::xmlroles, nsGkAtoms::searchbox); + } + attributes->SetAttribute(nsGkAtoms::textInputType, inputType); + } + } + // If this element has the placeholder attribute set, + // and if that is not identical to the name, expose it as an object attribute. + nsString placeholderText; + if (mContent->AsElement()->GetAttr(nsGkAtoms::placeholder, placeholderText)) { + nsAutoString name; + const_cast<HTMLTextFieldAccessible*>(this)->Name(name); + if (!name.Equals(placeholderText)) { + attributes->SetAttribute(nsGkAtoms::placeholder, + std::move(placeholderText)); + } + } + + return attributes.forget(); +} + +ENameValueFlag HTMLTextFieldAccessible::Name(nsString& aName) const { + ENameValueFlag nameFlag = LocalAccessible::Name(aName); + if (!aName.IsEmpty()) return nameFlag; + + // text inputs and textareas might have useful placeholder text + mContent->AsElement()->GetAttr(nsGkAtoms::placeholder, aName); + return eNameOK; +} + +void HTMLTextFieldAccessible::Value(nsString& aValue) const { + aValue.Truncate(); + if (NativeState() & states::PROTECTED) { // Don't return password text! + return; + } + + HTMLTextAreaElement* textArea = HTMLTextAreaElement::FromNode(mContent); + if (textArea) { + textArea->GetValue(aValue); + return; + } + + HTMLInputElement* input = HTMLInputElement::FromNode(mContent); + if (input) { + // Pass NonSystem as the caller type, to be safe. We don't expect to have a + // file input here. + input->GetValue(aValue, CallerType::NonSystem); + } +} + +bool HTMLTextFieldAccessible::AttributeChangesState(nsAtom* aAttribute) { + if (aAttribute == nsGkAtoms::readonly || aAttribute == nsGkAtoms::list_ || + aAttribute == nsGkAtoms::autocomplete) { + return true; + } + + return LocalAccessible::AttributeChangesState(aAttribute); +} + +void HTMLTextFieldAccessible::ApplyARIAState(uint64_t* aState) const { + HyperTextAccessible::ApplyARIAState(aState); + aria::MapToState(aria::eARIAAutoComplete, mContent->AsElement(), aState); +} + +uint64_t HTMLTextFieldAccessible::NativeState() const { + uint64_t state = HyperTextAccessible::NativeState(); + + // Text fields are always editable, even if they are also read only or + // disabled. + state |= states::EDITABLE; + + // can be focusable, focused, protected. readonly, unavailable, selected + if (mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type, + nsGkAtoms::password, eIgnoreCase)) { + state |= states::PROTECTED; + } + + if (mContent->AsElement()->HasAttr(nsGkAtoms::readonly)) { + state |= states::READONLY; + } + + // Is it an <input> or a <textarea> ? + HTMLInputElement* input = HTMLInputElement::FromNode(mContent); + state |= input && input->IsSingleLineTextControl() ? states::SINGLE_LINE + : states::MULTI_LINE; + + if (state & (states::PROTECTED | states::MULTI_LINE | states::READONLY | + states::UNAVAILABLE)) { + return state; + } + + // Expose autocomplete state if it has associated autocomplete list. + if (mContent->AsElement()->HasAttr(nsGkAtoms::list_)) { + return state | states::SUPPORTS_AUTOCOMPLETION | states::HASPOPUP; + } + + if (Preferences::GetBool("browser.formfill.enable")) { + // Check to see if autocompletion is allowed on this input. We don't expose + // it for password fields even though the entire password can be remembered + // for a page if the user asks it to be. However, the kind of autocomplete + // we're talking here is based on what the user types, where a popup of + // possible choices comes up. + nsAutoString autocomplete; + mContent->AsElement()->GetAttr(nsGkAtoms::autocomplete, autocomplete); + + if (!autocomplete.LowerCaseEqualsLiteral("off")) { + Element* formElement = input->GetForm(); + if (formElement) { + formElement->GetAttr(nsGkAtoms::autocomplete, autocomplete); + } + + if (!formElement || !autocomplete.LowerCaseEqualsLiteral("off")) { + state |= states::SUPPORTS_AUTOCOMPLETION; + } + } + } + + return state; +} + +bool HTMLTextFieldAccessible::HasPrimaryAction() const { return true; } + +void HTMLTextFieldAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) { + if (aIndex == eAction_Click) aName.AssignLiteral("activate"); +} + +bool HTMLTextFieldAccessible::DoAction(uint8_t aIndex) const { + if (aIndex != 0) return false; + + if (FocusMgr()->IsFocused(this)) { + // This already has focus, so TakeFocus()will do nothing. However, the user + // might be activating this element because they dismissed a touch keyboard + // and want to bring it back. + DoCommand(); + } else { + TakeFocus(); + } + return true; +} + +already_AddRefed<EditorBase> HTMLTextFieldAccessible::GetEditor() const { + RefPtr<TextControlElement> textControlElement = + TextControlElement::FromNodeOrNull(mContent); + if (!textControlElement) { + return nullptr; + } + RefPtr<TextEditor> textEditor = textControlElement->GetTextEditor(); + return textEditor.forget(); +} + +void HTMLTextFieldAccessible::DOMAttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType, + const nsAttrValue* aOldValue, + uint64_t aOldState) { + if (aAttribute == nsGkAtoms::placeholder) { + mDoc->QueueCacheUpdate(this, CacheDomain::NameAndDescription); + return; + } + HyperTextAccessible::DOMAttributeChanged(aNameSpaceID, aAttribute, aModType, + aOldValue, aOldState); +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLTextFieldAccessible: Widgets + +bool HTMLTextFieldAccessible::IsWidget() const { return true; } + +LocalAccessible* HTMLTextFieldAccessible::ContainerWidget() const { + return nullptr; +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLFileInputAccessible +//////////////////////////////////////////////////////////////////////////////// + +HTMLFileInputAccessible::HTMLFileInputAccessible(nsIContent* aContent, + DocAccessible* aDoc) + : HyperTextAccessible(aContent, aDoc) { + mType = eHTMLFileInputType; + mGenericTypes |= eButton; +} + +role HTMLFileInputAccessible::NativeRole() const { return roles::PUSHBUTTON; } + +bool HTMLFileInputAccessible::IsAcceptableChild(nsIContent* aEl) const { + // File inputs are rendered using native anonymous children. However, we + // want to expose this as a button Accessible so that clients can pick up the + // name and description from the button they activate, rather than a + // container. We still expose the text leaf descendants so we can get the + // name of the Browse button and the file name. + return aEl->IsText(); +} + +ENameValueFlag HTMLFileInputAccessible::Name(nsString& aName) const { + ENameValueFlag flag = HyperTextAccessible::Name(aName); + if (flag == eNameFromSubtree) { + // The author didn't provide a name. We'll compute the name from our subtree + // below. + aName.Truncate(); + } else { + // The author provided a name. We do use that, but we also append our + // subtree text so the user knows this is a file chooser button and what + // file has been chosen. + if (aName.IsEmpty()) { + // Name computation is recursing, perhaps due to a wrapping <label>. Don't + // append the subtree text. Return " " to prevent + // nsTextEquivUtils::AppendFromAccessible walking the subtree itself. + aName += ' '; + return flag; + } + } + // Unfortunately, GetNameFromSubtree doesn't separate the button text from the + // file name text. Compute the text ourselves. + uint32_t count = ChildCount(); + for (uint32_t c = 0; c < count; ++c) { + TextLeafAccessible* leaf = LocalChildAt(c)->AsTextLeaf(); + MOZ_ASSERT(leaf); + if (!aName.IsEmpty()) { + aName += ' '; + } + aName += leaf->Text(); + } + return flag; +} + +bool HTMLFileInputAccessible::HasPrimaryAction() const { return true; } + +void HTMLFileInputAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) { + if (aIndex == 0) { + aName.AssignLiteral("press"); + } +} + +bool HTMLFileInputAccessible::IsWidget() const { return true; } + +//////////////////////////////////////////////////////////////////////////////// +// HTMLSpinnerAccessible +//////////////////////////////////////////////////////////////////////////////// + +role HTMLSpinnerAccessible::NativeRole() const { return roles::SPINBUTTON; } + +void HTMLSpinnerAccessible::Value(nsString& aValue) const { + HTMLTextFieldAccessible::Value(aValue); + if (!aValue.IsEmpty()) return; + + // Pass NonSystem as the caller type, to be safe. We don't expect to have a + // file input here. + HTMLInputElement::FromNode(mContent)->GetValue(aValue, CallerType::NonSystem); +} + +double HTMLSpinnerAccessible::MaxValue() const { + double value = HTMLTextFieldAccessible::MaxValue(); + if (!std::isnan(value)) return value; + + return HTMLInputElement::FromNode(mContent)->GetMaximum().toDouble(); +} + +double HTMLSpinnerAccessible::MinValue() const { + double value = HTMLTextFieldAccessible::MinValue(); + if (!std::isnan(value)) return value; + + return HTMLInputElement::FromNode(mContent)->GetMinimum().toDouble(); +} + +double HTMLSpinnerAccessible::Step() const { + double value = HTMLTextFieldAccessible::Step(); + if (!std::isnan(value)) return value; + + return HTMLInputElement::FromNode(mContent)->GetStep().toDouble(); +} + +double HTMLSpinnerAccessible::CurValue() const { + double value = HTMLTextFieldAccessible::CurValue(); + if (!std::isnan(value)) return value; + + return HTMLInputElement::FromNode(mContent)->GetValueAsDecimal().toDouble(); +} + +bool HTMLSpinnerAccessible::SetCurValue(double aValue) { + ErrorResult er; + HTMLInputElement::FromNode(mContent)->SetValueAsNumber(aValue, er); + return !er.Failed(); +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLRangeAccessible +//////////////////////////////////////////////////////////////////////////////// + +role HTMLRangeAccessible::NativeRole() const { return roles::SLIDER; } + +bool HTMLRangeAccessible::IsWidget() const { return true; } + +void HTMLRangeAccessible::Value(nsString& aValue) const { + LeafAccessible::Value(aValue); + if (!aValue.IsEmpty()) return; + + // Pass NonSystem as the caller type, to be safe. We don't expect to have a + // file input here. + HTMLInputElement::FromNode(mContent)->GetValue(aValue, CallerType::NonSystem); +} + +double HTMLRangeAccessible::MaxValue() const { + double value = LeafAccessible::MaxValue(); + if (!std::isnan(value)) return value; + + return HTMLInputElement::FromNode(mContent)->GetMaximum().toDouble(); +} + +double HTMLRangeAccessible::MinValue() const { + double value = LeafAccessible::MinValue(); + if (!std::isnan(value)) return value; + + return HTMLInputElement::FromNode(mContent)->GetMinimum().toDouble(); +} + +double HTMLRangeAccessible::Step() const { + double value = LeafAccessible::Step(); + if (!std::isnan(value)) return value; + + return HTMLInputElement::FromNode(mContent)->GetStep().toDouble(); +} + +double HTMLRangeAccessible::CurValue() const { + double value = LeafAccessible::CurValue(); + if (!std::isnan(value)) return value; + + return HTMLInputElement::FromNode(mContent)->GetValueAsDecimal().toDouble(); +} + +bool HTMLRangeAccessible::SetCurValue(double aValue) { + nsAutoString strValue; + strValue.AppendFloat(aValue); + HTMLInputElement::FromNode(mContent)->SetUserInput( + strValue, *nsContentUtils::GetSystemPrincipal()); + return true; +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLGroupboxAccessible +//////////////////////////////////////////////////////////////////////////////// + +HTMLGroupboxAccessible::HTMLGroupboxAccessible(nsIContent* aContent, + DocAccessible* aDoc) + : HyperTextAccessible(aContent, aDoc) {} + +role HTMLGroupboxAccessible::NativeRole() const { return roles::GROUPING; } + +nsIContent* HTMLGroupboxAccessible::GetLegend() const { + for (nsIContent* legendContent = mContent->GetFirstChild(); legendContent; + legendContent = legendContent->GetNextSibling()) { + if (legendContent->NodeInfo()->Equals(nsGkAtoms::legend, + mContent->GetNameSpaceID())) { + // Either XHTML namespace or no namespace + return legendContent; + } + } + + return nullptr; +} + +ENameValueFlag HTMLGroupboxAccessible::NativeName(nsString& aName) const { + ENameValueFlag nameFlag = LocalAccessible::NativeName(aName); + if (!aName.IsEmpty()) return nameFlag; + + nsIContent* legendContent = GetLegend(); + if (legendContent) { + nsTextEquivUtils::AppendTextEquivFromContent(this, legendContent, &aName); + } + + aName.CompressWhitespace(); + return eNameOK; +} + +Relation HTMLGroupboxAccessible::RelationByType(RelationType aType) const { + Relation rel = HyperTextAccessible::RelationByType(aType); + // No override for label, so use <legend> for this <fieldset> + if (aType == RelationType::LABELLED_BY) rel.AppendTarget(mDoc, GetLegend()); + + return rel; +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLLegendAccessible +//////////////////////////////////////////////////////////////////////////////// + +HTMLLegendAccessible::HTMLLegendAccessible(nsIContent* aContent, + DocAccessible* aDoc) + : HyperTextAccessible(aContent, aDoc) {} + +Relation HTMLLegendAccessible::RelationByType(RelationType aType) const { + Relation rel = HyperTextAccessible::RelationByType(aType); + if (aType != RelationType::LABEL_FOR) return rel; + + LocalAccessible* groupbox = LocalParent(); + if (groupbox && groupbox->Role() == roles::GROUPING) { + rel.AppendTarget(groupbox); + } + + return rel; +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLFigureAccessible +//////////////////////////////////////////////////////////////////////////////// + +HTMLFigureAccessible::HTMLFigureAccessible(nsIContent* aContent, + DocAccessible* aDoc) + : HyperTextAccessible(aContent, aDoc) {} + +ENameValueFlag HTMLFigureAccessible::NativeName(nsString& aName) const { + ENameValueFlag nameFlag = HyperTextAccessible::NativeName(aName); + if (!aName.IsEmpty()) return nameFlag; + + nsIContent* captionContent = Caption(); + if (captionContent) { + nsTextEquivUtils::AppendTextEquivFromContent(this, captionContent, &aName); + } + + aName.CompressWhitespace(); + return eNameOK; +} + +Relation HTMLFigureAccessible::RelationByType(RelationType aType) const { + Relation rel = HyperTextAccessible::RelationByType(aType); + if (aType == RelationType::LABELLED_BY) rel.AppendTarget(mDoc, Caption()); + + return rel; +} + +nsIContent* HTMLFigureAccessible::Caption() const { + for (nsIContent* childContent = mContent->GetFirstChild(); childContent; + childContent = childContent->GetNextSibling()) { + if (childContent->NodeInfo()->Equals(nsGkAtoms::figcaption, + mContent->GetNameSpaceID())) { + return childContent; + } + } + + return nullptr; +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLFigcaptionAccessible +//////////////////////////////////////////////////////////////////////////////// + +HTMLFigcaptionAccessible::HTMLFigcaptionAccessible(nsIContent* aContent, + DocAccessible* aDoc) + : HyperTextAccessible(aContent, aDoc) {} + +Relation HTMLFigcaptionAccessible::RelationByType(RelationType aType) const { + Relation rel = HyperTextAccessible::RelationByType(aType); + if (aType != RelationType::LABEL_FOR) return rel; + + LocalAccessible* figure = LocalParent(); + if (figure && figure->GetContent()->NodeInfo()->Equals( + nsGkAtoms::figure, mContent->GetNameSpaceID())) { + rel.AppendTarget(figure); + } + + return rel; +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLProgressAccessible +//////////////////////////////////////////////////////////////////////////////// + +role HTMLProgressAccessible::NativeRole() const { return roles::PROGRESSBAR; } + +uint64_t HTMLProgressAccessible::NativeState() const { + uint64_t state = LeafAccessible::NativeState(); + + // An undetermined progressbar (i.e. without a value) has a mixed state. + nsAutoString attrValue; + mContent->AsElement()->GetAttr(nsGkAtoms::value, attrValue); + if (attrValue.IsEmpty()) { + state |= states::MIXED; + } + + return state; +} + +bool HTMLProgressAccessible::IsWidget() const { return true; } + +void HTMLProgressAccessible::Value(nsString& aValue) const { + LeafAccessible::Value(aValue); + if (!aValue.IsEmpty()) { + return; + } + + double maxValue = MaxValue(); + if (std::isnan(maxValue) || maxValue == 0) { + return; + } + + double curValue = CurValue(); + if (std::isnan(curValue)) { + return; + } + + // Treat the current value bigger than maximum as 100%. + double percentValue = + (curValue < maxValue) ? (curValue / maxValue) * 100 : 100; + + aValue.AppendFloat(percentValue); + aValue.Append('%'); +} + +double HTMLProgressAccessible::MaxValue() const { + double value = LeafAccessible::MaxValue(); + if (!std::isnan(value)) { + return value; + } + + nsAutoString strValue; + if (mContent->AsElement()->GetAttr(nsGkAtoms::max, strValue)) { + nsresult result = NS_OK; + value = strValue.ToDouble(&result); + if (NS_SUCCEEDED(result)) { + return value; + } + } + + return 1; +} + +double HTMLProgressAccessible::MinValue() const { + double value = LeafAccessible::MinValue(); + return std::isnan(value) ? 0 : value; +} + +double HTMLProgressAccessible::Step() const { + double value = LeafAccessible::Step(); + return std::isnan(value) ? 0 : value; +} + +double HTMLProgressAccessible::CurValue() const { + double value = LeafAccessible::CurValue(); + if (!std::isnan(value)) { + return value; + } + + nsAutoString attrValue; + if (!mContent->AsElement()->GetAttr(nsGkAtoms::value, attrValue)) { + return UnspecifiedNaN<double>(); + } + + nsresult error = NS_OK; + value = attrValue.ToDouble(&error); + return NS_FAILED(error) ? UnspecifiedNaN<double>() : value; +} + +bool HTMLProgressAccessible::SetCurValue(double aValue) { + return false; // progress meters are readonly. +} + +void HTMLProgressAccessible::DOMAttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType, + const nsAttrValue* aOldValue, + uint64_t aOldState) { + LeafAccessible::DOMAttributeChanged(aNameSpaceID, aAttribute, aModType, + aOldValue, aOldState); + + if (aAttribute == nsGkAtoms::value) { + mDoc->FireDelayedEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE, this); + + uint64_t currState = NativeState(); + if ((aOldState ^ currState) & states::MIXED) { + RefPtr<AccEvent> stateChangeEvent = new AccStateChangeEvent( + this, states::MIXED, (currState & states::MIXED)); + mDoc->FireDelayedEvent(stateChangeEvent); + } + } +} + +//////////////////////////////////////////////////////////////////////////////// +// HTMLMeterAccessible +//////////////////////////////////////////////////////////////////////////////// + +role HTMLMeterAccessible::NativeRole() const { return roles::METER; } + +bool HTMLMeterAccessible::IsWidget() const { return true; } + +void HTMLMeterAccessible::Value(nsString& aValue) const { + LeafAccessible::Value(aValue); + if (!aValue.IsEmpty()) { + return; + } + + // If we did not get a value from the above LeafAccessible call, + // we should check to see if the meter has inner text. + // If it does, we'll use that as our value. + nsTextEquivUtils::AppendFromDOMChildren(mContent, &aValue); + aValue.CompressWhitespace(); + if (!aValue.IsEmpty()) { + return; + } + + // If no inner text is found, use curValue + double curValue = CurValue(); + if (std::isnan(curValue)) { + return; + } + + aValue.AppendFloat(curValue); +} + +double HTMLMeterAccessible::MaxValue() const { + double max = LeafAccessible::MaxValue(); + double min = MinValue(); + + if (!std::isnan(max)) { + return max > min ? max : min; + } + + // If we didn't find a max value, check for the max attribute + nsAutoString strValue; + if (mContent->AsElement()->GetAttr(nsGkAtoms::max, strValue)) { + nsresult result = NS_OK; + max = strValue.ToDouble(&result); + if (NS_SUCCEEDED(result)) { + return max > min ? max : min; + } + } + + return 1 > min ? 1 : min; +} + +double HTMLMeterAccessible::MinValue() const { + double min = LeafAccessible::MinValue(); + if (!std::isnan(min)) { + return min; + } + + nsAutoString strValue; + if (mContent->AsElement()->GetAttr(nsGkAtoms::min, strValue)) { + nsresult result = NS_OK; + min = strValue.ToDouble(&result); + if (NS_SUCCEEDED(result)) { + return min; + } + } + + return 0; +} + +double HTMLMeterAccessible::CurValue() const { + double value = LeafAccessible::CurValue(); + double minValue = MinValue(); + + if (std::isnan(value)) { + /* If we didn't find a value from the LeafAccessible call above, check + * for a value attribute */ + nsAutoString attrValue; + if (!mContent->AsElement()->GetAttr(nsGkAtoms::value, attrValue)) { + return minValue; + } + + // If we find a value attribute, attempt to convert it to a double + nsresult error = NS_OK; + value = attrValue.ToDouble(&error); + if (NS_FAILED(error)) { + return minValue; + } + } + + /* If we end up with a defined value, verify it falls between + * our established min/max. Otherwise, snap it to the nearest boundary. */ + double maxValue = MaxValue(); + if (value > maxValue) { + value = maxValue; + } else if (value < minValue) { + value = minValue; + } + + return value; +} + +bool HTMLMeterAccessible::SetCurValue(double aValue) { + return false; // meters are readonly. +} + +void HTMLMeterAccessible::DOMAttributeChanged(int32_t aNameSpaceID, + nsAtom* aAttribute, + int32_t aModType, + const nsAttrValue* aOldValue, + uint64_t aOldState) { + LeafAccessible::DOMAttributeChanged(aNameSpaceID, aAttribute, aModType, + aOldValue, aOldState); + + if (aAttribute == nsGkAtoms::value) { + mDoc->FireDelayedEvent(nsIAccessibleEvent::EVENT_VALUE_CHANGE, this); + } +} |