зеркало из https://github.com/mozilla/gecko-dev.git
442 строки
15 KiB
C++
442 строки
15 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "XULFormControlAccessible.h"
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#include "Accessible-inl.h"
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#include "HTMLFormControlAccessible.h"
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#include "nsAccUtils.h"
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#include "DocAccessible.h"
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#include "nsIAccessibleRelation.h"
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#include "Relation.h"
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#include "Role.h"
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#include "States.h"
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#include "TreeWalker.h"
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#include "XULMenuAccessible.h"
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#include "nsIDOMXULButtonElement.h"
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#include "nsIDOMXULMenuListElement.h"
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#include "nsIDOMXULRadioGroupElement.h"
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#include "nsIDOMXULSelectCntrlItemEl.h"
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#include "nsIEditor.h"
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#include "nsIFrame.h"
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#include "nsITextControlFrame.h"
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#include "nsMenuPopupFrame.h"
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#include "nsNameSpaceManager.h"
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#include "mozilla/dom/Element.h"
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULButtonAccessible::XULButtonAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: AccessibleWrap(aContent, aDoc) {
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if (ContainsMenu()) {
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mGenericTypes |= eMenuButton;
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} else {
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mGenericTypes |= eButton;
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}
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}
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XULButtonAccessible::~XULButtonAccessible() {}
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible: nsISupports
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible: nsIAccessible
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uint8_t XULButtonAccessible::ActionCount() const { return 1; }
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void XULButtonAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
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if (aIndex == eAction_Click) aName.AssignLiteral("press");
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}
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bool XULButtonAccessible::DoAction(uint8_t aIndex) const {
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if (aIndex != 0) return false;
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DoCommand();
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible: Accessible
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role XULButtonAccessible::NativeRole() const { return roles::PUSHBUTTON; }
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uint64_t XULButtonAccessible::NativeState() const {
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// Possible states: focused, focusable, unavailable(disabled).
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// get focus and disable status from base class
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uint64_t state = Accessible::NativeState();
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// Buttons can be checked -- they simply appear pressed in rather than checked
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nsCOMPtr<nsIDOMXULButtonElement> xulButtonElement = Elm()->AsXULButton();
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if (xulButtonElement) {
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nsAutoString type;
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xulButtonElement->GetType(type);
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if (type.EqualsLiteral("checkbox") || type.EqualsLiteral("radio")) {
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state |= states::CHECKABLE;
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}
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// Some buttons can have their checked state set without being of type
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// checkbox or radio. Expose the pressed state unconditionally.
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bool checked = false;
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xulButtonElement->GetChecked(&checked);
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if (checked) {
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state |= states::PRESSED;
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}
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}
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if (ContainsMenu()) state |= states::HASPOPUP;
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if (mContent->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::_default))
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state |= states::DEFAULT;
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return state;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible: Widgets
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bool XULButtonAccessible::IsWidget() const { return true; }
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bool XULButtonAccessible::IsActiveWidget() const {
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return FocusMgr()->HasDOMFocus(mContent);
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}
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bool XULButtonAccessible::AreItemsOperable() const {
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if (IsMenuButton()) {
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Accessible* menuPopup = mChildren.SafeElementAt(0, nullptr);
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if (menuPopup) {
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nsMenuPopupFrame* menuPopupFrame = do_QueryFrame(menuPopup->GetFrame());
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return menuPopupFrame->IsOpen();
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}
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}
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return false; // no items
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}
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Accessible* XULButtonAccessible::ContainerWidget() const {
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if (IsMenuButton() && mParent && mParent->IsAutoComplete()) return mParent;
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return nullptr;
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}
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bool XULButtonAccessible::IsAcceptableChild(nsIContent* aEl) const {
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// In general XUL button has not accessible children. Nevertheless menu
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// buttons can have popup accessibles (@type="menu" or columnpicker).
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return aEl->IsXULElement(nsGkAtoms::menupopup) ||
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aEl->IsXULElement(nsGkAtoms::popup);
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULButtonAccessible protected
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bool XULButtonAccessible::ContainsMenu() const {
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return mContent->AsElement()->AttrValueIs(kNameSpaceID_None, nsGkAtoms::type,
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nsGkAtoms::menu, eCaseMatters);
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULDropmarkerAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULDropmarkerAccessible::XULDropmarkerAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: LeafAccessible(aContent, aDoc) {}
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uint8_t XULDropmarkerAccessible::ActionCount() const { return 1; }
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bool XULDropmarkerAccessible::DropmarkerOpen(bool aToggleOpen) const {
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bool isOpen = false;
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nsIContent* parent = mContent->GetFlattenedTreeParent();
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while (parent) {
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nsCOMPtr<nsIDOMXULButtonElement> parentButtonElement =
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parent->AsElement()->AsXULButton();
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if (parentButtonElement) {
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parentButtonElement->GetOpen(&isOpen);
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if (aToggleOpen) parentButtonElement->SetOpen(!isOpen);
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return isOpen;
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}
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nsCOMPtr<nsIDOMXULMenuListElement> parentMenuListElement =
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parent->AsElement()->AsXULMenuList();
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if (parentMenuListElement) {
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parentMenuListElement->GetOpen(&isOpen);
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if (aToggleOpen) parentMenuListElement->SetOpen(!isOpen);
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return isOpen;
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}
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parent = parent->GetFlattenedTreeParent();
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}
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return isOpen;
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}
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void XULDropmarkerAccessible::ActionNameAt(uint8_t aIndex, nsAString& aName) {
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aName.Truncate();
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if (aIndex == eAction_Click) {
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if (DropmarkerOpen(false))
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aName.AssignLiteral("close");
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else
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aName.AssignLiteral("open");
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}
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}
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bool XULDropmarkerAccessible::DoAction(uint8_t index) const {
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if (index == eAction_Click) {
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DropmarkerOpen(true); // Reverse the open attribute
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return true;
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}
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return false;
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}
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role XULDropmarkerAccessible::NativeRole() const { return roles::PUSHBUTTON; }
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uint64_t XULDropmarkerAccessible::NativeState() const {
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return DropmarkerOpen(false) ? states::PRESSED : 0;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULGroupboxAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULGroupboxAccessible::XULGroupboxAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: AccessibleWrap(aContent, aDoc) {}
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role XULGroupboxAccessible::NativeRole() const { return roles::GROUPING; }
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ENameValueFlag XULGroupboxAccessible::NativeName(nsString& aName) const {
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// XXX: we use the first related accessible only.
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Accessible* label = RelationByType(RelationType::LABELLED_BY).Next();
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if (label) return label->Name(aName);
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return eNameOK;
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}
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Relation XULGroupboxAccessible::RelationByType(RelationType aType) const {
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Relation rel = AccessibleWrap::RelationByType(aType);
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// The label for xul:groupbox is generated from the first xul:label
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if (aType == RelationType::LABELLED_BY && ChildCount() > 0) {
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Accessible* childAcc = GetChildAt(0);
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if (childAcc->Role() == roles::LABEL &&
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childAcc->GetContent()->IsXULElement(nsGkAtoms::label)) {
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rel.AppendTarget(childAcc);
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}
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}
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return rel;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULRadioButtonAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULRadioButtonAccessible::XULRadioButtonAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: RadioButtonAccessible(aContent, aDoc) {}
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uint64_t XULRadioButtonAccessible::NativeState() const {
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uint64_t state = LeafAccessible::NativeState();
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state |= states::CHECKABLE;
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nsCOMPtr<nsIDOMXULSelectControlItemElement> radioButton =
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Elm()->AsXULSelectControlItem();
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if (radioButton) {
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bool selected = false; // Radio buttons can be selected
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radioButton->GetSelected(&selected);
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if (selected) {
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state |= states::CHECKED;
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}
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}
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return state;
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}
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uint64_t XULRadioButtonAccessible::NativeInteractiveState() const {
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return NativelyUnavailable() ? states::UNAVAILABLE : states::FOCUSABLE;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULRadioButtonAccessible: Widgets
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Accessible* XULRadioButtonAccessible::ContainerWidget() const {
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return mParent;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULRadioGroupAccessible
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////////////////////////////////////////////////////////////////////////////////
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/**
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* XUL Radio Group
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* The Radio Group proxies for the Radio Buttons themselves. The Group gets
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* focus whereas the Buttons do not. So we only have an accessible object for
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* this for the purpose of getting the proper RadioButton. Need this here to
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* avoid circular reference problems when navigating the accessible tree and
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* for getting to the radiobuttons.
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*/
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XULRadioGroupAccessible::XULRadioGroupAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: XULSelectControlAccessible(aContent, aDoc) {}
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role XULRadioGroupAccessible::NativeRole() const { return roles::RADIO_GROUP; }
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uint64_t XULRadioGroupAccessible::NativeInteractiveState() const {
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// The radio group is not focusable. Sometimes the focus controller will
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// report that it is focused. That means that the actual selected radio button
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// should be considered focused.
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return NativelyUnavailable() ? states::UNAVAILABLE : 0;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULRadioGroupAccessible: Widgets
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bool XULRadioGroupAccessible::IsWidget() const { return true; }
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bool XULRadioGroupAccessible::IsActiveWidget() const {
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return FocusMgr()->HasDOMFocus(mContent);
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}
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bool XULRadioGroupAccessible::AreItemsOperable() const { return true; }
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Accessible* XULRadioGroupAccessible::CurrentItem() const {
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if (!mSelectControl) {
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return nullptr;
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}
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RefPtr<Element> currentItemElm;
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nsCOMPtr<nsIDOMXULRadioGroupElement> group =
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mSelectControl->AsXULRadioGroup();
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if (group) {
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group->GetFocusedItem(getter_AddRefs(currentItemElm));
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}
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if (currentItemElm) {
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DocAccessible* document = Document();
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if (document) {
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return document->GetAccessible(currentItemElm);
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}
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}
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return nullptr;
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}
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void XULRadioGroupAccessible::SetCurrentItem(const Accessible* aItem) {
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if (!mSelectControl) {
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return;
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}
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nsCOMPtr<Element> itemElm = aItem->Elm();
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nsCOMPtr<nsIDOMXULRadioGroupElement> group =
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mSelectControl->AsXULRadioGroup();
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if (group) {
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group->SetFocusedItem(itemElm);
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULStatusBarAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULStatusBarAccessible::XULStatusBarAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: AccessibleWrap(aContent, aDoc) {}
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role XULStatusBarAccessible::NativeRole() const { return roles::STATUSBAR; }
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////////////////////////////////////////////////////////////////////////////////
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// XULToolbarButtonAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULToolbarButtonAccessible::XULToolbarButtonAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: XULButtonAccessible(aContent, aDoc) {}
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void XULToolbarButtonAccessible::GetPositionAndSizeInternal(int32_t* aPosInSet,
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int32_t* aSetSize) {
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int32_t setSize = 0;
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int32_t posInSet = 0;
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Accessible* parent = Parent();
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if (!parent) return;
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uint32_t childCount = parent->ChildCount();
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for (uint32_t childIdx = 0; childIdx < childCount; childIdx++) {
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Accessible* child = parent->GetChildAt(childIdx);
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if (IsSeparator(child)) { // end of a group of buttons
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if (posInSet) break; // we've found our group, so we're done
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setSize = 0; // not our group, so start a new group
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} else {
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setSize++; // another button in the group
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if (child == this) posInSet = setSize; // we've found our button
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}
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}
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*aPosInSet = posInSet;
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*aSetSize = setSize;
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}
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bool XULToolbarButtonAccessible::IsSeparator(Accessible* aAccessible) {
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nsIContent* content = aAccessible->GetContent();
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return content && content->IsAnyOfXULElements(nsGkAtoms::toolbarseparator,
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nsGkAtoms::toolbarspacer,
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nsGkAtoms::toolbarspring);
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULToolbarButtonAccessible: Widgets
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bool XULToolbarButtonAccessible::IsAcceptableChild(nsIContent* aEl) const {
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// In general XUL button has not accessible children. Nevertheless menu
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// buttons can have popup accessibles (@type="menu" or columnpicker).
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// Also: Toolbar buttons can have labels as children.
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// But only if the label attribute is not present.
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return aEl->IsXULElement(nsGkAtoms::menupopup) ||
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aEl->IsXULElement(nsGkAtoms::popup) ||
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(aEl->IsXULElement(nsGkAtoms::label) &&
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!mContent->AsElement()->HasAttr(kNameSpaceID_None, nsGkAtoms::label));
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULToolbarAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULToolbarAccessible::XULToolbarAccessible(nsIContent* aContent,
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DocAccessible* aDoc)
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: AccessibleWrap(aContent, aDoc) {}
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role XULToolbarAccessible::NativeRole() const { return roles::TOOLBAR; }
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ENameValueFlag XULToolbarAccessible::NativeName(nsString& aName) const {
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if (mContent->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::toolbarname,
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aName))
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aName.CompressWhitespace();
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return eNameOK;
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}
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////////////////////////////////////////////////////////////////////////////////
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// XULToolbarAccessible
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////////////////////////////////////////////////////////////////////////////////
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XULToolbarSeparatorAccessible::XULToolbarSeparatorAccessible(
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nsIContent* aContent, DocAccessible* aDoc)
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: LeafAccessible(aContent, aDoc) {}
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role XULToolbarSeparatorAccessible::NativeRole() const {
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return roles::SEPARATOR;
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}
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uint64_t XULToolbarSeparatorAccessible::NativeState() const { return 0; }
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