393 lines
15 KiB
C++
393 lines
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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#ifndef __nsAccessibilityService_h__
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#define __nsAccessibilityService_h__
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#include "nsIAccessibilityService.h"
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#include "mozilla/a11y/DocManager.h"
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#include "mozilla/a11y/FocusManager.h"
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#include "mozilla/a11y/Role.h"
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#include "mozilla/a11y/SelectionManager.h"
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#include "mozilla/Preferences.h"
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#include "nsIObserver.h"
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#include "nsIEventListenerService.h"
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class nsImageFrame;
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class nsIArray;
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class nsIPersistentProperties;
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class nsPluginFrame;
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class nsITreeView;
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namespace mozilla {
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namespace a11y {
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class ApplicationAccessible;
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class xpcAccessibleApplication;
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/**
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* Return focus manager.
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*/
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FocusManager* FocusMgr();
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/**
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* Return selection manager.
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*/
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SelectionManager* SelectionMgr();
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/**
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* Returns the application accessible.
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*/
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ApplicationAccessible* ApplicationAcc();
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xpcAccessibleApplication* XPCApplicationAcc();
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typedef Accessible* (New_Accessible)(nsIContent* aContent, Accessible* aContext);
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struct MarkupAttrInfo {
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nsIAtom** name;
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nsIAtom** value;
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nsIAtom** DOMAttrName;
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nsIAtom** DOMAttrValue;
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};
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struct MarkupMapInfo {
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nsIAtom** tag;
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New_Accessible* new_func;
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a11y::role role;
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MarkupAttrInfo attrs[4];
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};
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} // namespace a11y
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} // namespace mozilla
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class nsAccessibilityService final : public mozilla::a11y::DocManager,
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public mozilla::a11y::FocusManager,
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public mozilla::a11y::SelectionManager,
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public nsIAccessibilityService,
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public nsIListenerChangeListener,
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public nsIObserver
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{
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public:
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typedef mozilla::a11y::Accessible Accessible;
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typedef mozilla::a11y::DocAccessible DocAccessible;
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// nsIListenerChangeListener
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NS_IMETHOD ListenersChanged(nsIArray* aEventChanges) override;
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protected:
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virtual ~nsAccessibilityService();
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_NSIACCESSIBLERETRIEVAL
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NS_DECL_NSIOBSERVER
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// nsIAccessibilityService
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virtual Accessible* GetRootDocumentAccessible(nsIPresShell* aPresShell,
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bool aCanCreate) override;
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already_AddRefed<Accessible>
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CreatePluginAccessible(nsPluginFrame* aFrame, nsIContent* aContent,
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Accessible* aContext);
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/**
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* Adds/remove ATK root accessible for gtk+ native window to/from children
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* of the application accessible.
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*/
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virtual Accessible* AddNativeRootAccessible(void* aAtkAccessible) override;
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virtual void RemoveNativeRootAccessible(Accessible* aRootAccessible) override;
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virtual bool HasAccessible(nsIDOMNode* aDOMNode) override;
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// nsAccesibilityService
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/**
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* Notification used to update the accessible tree when deck panel is
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* switched.
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*/
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void DeckPanelSwitched(nsIPresShell* aPresShell, nsIContent* aDeckNode,
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nsIFrame* aPrevBoxFrame, nsIFrame* aCurrentBoxFrame);
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/**
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* Notification used to update the accessible tree when new content is
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* inserted.
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*/
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void ContentRangeInserted(nsIPresShell* aPresShell, nsIContent* aContainer,
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nsIContent* aStartChild, nsIContent* aEndChild);
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/**
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* Notification used to update the accessible tree when content is removed.
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*/
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void ContentRemoved(nsIPresShell* aPresShell, nsIContent* aChild);
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virtual void UpdateText(nsIPresShell* aPresShell, nsIContent* aContent);
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/**
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* Update XUL:tree accessible tree when treeview is changed.
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*/
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void TreeViewChanged(nsIPresShell* aPresShell, nsIContent* aContent,
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nsITreeView* aView);
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/**
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* Notify of input@type="element" value change.
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*/
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void RangeValueChanged(nsIPresShell* aPresShell, nsIContent* aContent);
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/**
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* Update list bullet accessible.
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*/
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virtual void UpdateListBullet(nsIPresShell* aPresShell,
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nsIContent* aHTMLListItemContent,
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bool aHasBullet);
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/**
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* Update the image map.
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*/
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void UpdateImageMap(nsImageFrame* aImageFrame);
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/**
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* Update the label accessible tree when rendered @value is changed.
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*/
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void UpdateLabelValue(nsIPresShell* aPresShell, nsIContent* aLabelElm,
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const nsString& aNewValue);
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/**
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* Notify accessibility that anchor jump has been accomplished to the given
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* target. Used by layout.
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*/
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void NotifyOfAnchorJumpTo(nsIContent *aTarget);
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/**
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* Notify that presshell is activated.
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*/
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virtual void PresShellActivated(nsIPresShell* aPresShell);
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/**
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* Recreate an accessible for the given content node in the presshell.
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*/
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void RecreateAccessible(nsIPresShell* aPresShell, nsIContent* aContent);
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virtual void FireAccessibleEvent(uint32_t aEvent, Accessible* aTarget) override;
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// nsAccessibiltiyService
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/**
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* Return true if accessibility service has been shutdown.
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*/
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static bool IsShutdown() { return gIsShutdown; }
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/**
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* Return an accessible for the given DOM node from the cache or create new
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* one.
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*
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* @param aNode [in] the given node
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* @param aContext [in] context the accessible is created in
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* @param aIsSubtreeHidden [out, optional] indicates whether the node's
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* frame and its subtree is hidden
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*/
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Accessible* GetOrCreateAccessible(nsINode* aNode, Accessible* aContext,
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bool* aIsSubtreeHidden = nullptr);
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mozilla::a11y::role MarkupRole(const nsIContent* aContent) const
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{
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const mozilla::a11y::MarkupMapInfo* markupMap =
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mMarkupMaps.Get(aContent->NodeInfo()->NameAtom());
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return markupMap ? markupMap->role : mozilla::a11y::roles::NOTHING;
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}
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/**
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* Set the object attribute defined by markup for the given element.
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*/
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void MarkupAttributes(const nsIContent* aContent,
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nsIPersistentProperties* aAttributes) const;
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private:
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// nsAccessibilityService creation is controlled by friend
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// NS_GetAccessibilityService, keep constructors private.
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nsAccessibilityService();
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nsAccessibilityService(const nsAccessibilityService&);
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nsAccessibilityService& operator =(const nsAccessibilityService&);
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private:
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/**
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* Initialize accessibility service.
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*/
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bool Init();
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/**
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* Shutdowns accessibility service.
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*/
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void Shutdown();
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/**
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* Create accessible for the element having XBL bindings.
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*/
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already_AddRefed<Accessible>
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CreateAccessibleByType(nsIContent* aContent, DocAccessible* aDoc);
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/**
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* Create an accessible whose type depends on the given frame.
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*/
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already_AddRefed<Accessible>
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CreateAccessibleByFrameType(nsIFrame* aFrame, nsIContent* aContent,
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Accessible* aContext);
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#ifdef MOZ_XUL
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/**
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* Create accessible for XUL tree element.
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*/
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already_AddRefed<Accessible>
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CreateAccessibleForXULTree(nsIContent* aContent, DocAccessible* aDoc);
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#endif
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/**
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* Reference for accessibility service instance.
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*/
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static nsAccessibilityService* gAccessibilityService;
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/**
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* Reference for application accessible instance.
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*/
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static mozilla::a11y::ApplicationAccessible* gApplicationAccessible;
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static mozilla::a11y::xpcAccessibleApplication* gXPCApplicationAccessible;
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/**
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* Indicates whether accessibility service was shutdown.
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*/
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static bool gIsShutdown;
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nsDataHashtable<nsPtrHashKey<const nsIAtom>, const mozilla::a11y::MarkupMapInfo*> mMarkupMaps;
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friend nsAccessibilityService* GetAccService();
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friend mozilla::a11y::FocusManager* mozilla::a11y::FocusMgr();
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friend mozilla::a11y::SelectionManager* mozilla::a11y::SelectionMgr();
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friend mozilla::a11y::ApplicationAccessible* mozilla::a11y::ApplicationAcc();
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friend mozilla::a11y::xpcAccessibleApplication* mozilla::a11y::XPCApplicationAcc();
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friend nsresult NS_GetAccessibilityService(nsIAccessibilityService** aResult);
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};
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/**
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* Return the accessibility service instance. (Handy global function)
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*/
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inline nsAccessibilityService*
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GetAccService()
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{
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return nsAccessibilityService::gAccessibilityService;
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}
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/**
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* Return true if we're in a content process and not B2G.
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*/
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inline bool
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IPCAccessibilityActive()
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{
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#ifdef MOZ_B2G
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return false;
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#else
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return XRE_IsContentProcess() &&
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mozilla::Preferences::GetBool("accessibility.ipc_architecture.enabled", true);
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#endif
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}
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/**
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* Map nsIAccessibleEvents constants to strings. Used by
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* nsIAccessibleRetrieval::getStringEventType() method.
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*/
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static const char kEventTypeNames[][40] = {
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"unknown", //
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"show", // EVENT_SHOW
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"hide", // EVENT_HIDE
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"reorder", // EVENT_REORDER
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"active decendent change", // EVENT_ACTIVE_DECENDENT_CHANGED
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"focus", // EVENT_FOCUS
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"state change", // EVENT_STATE_CHANGE
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"location change", // EVENT_LOCATION_CHANGE
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"name changed", // EVENT_NAME_CHANGE
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"description change", // EVENT_DESCRIPTION_CHANGE
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"value change", // EVENT_VALUE_CHANGE
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"help change", // EVENT_HELP_CHANGE
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"default action change", // EVENT_DEFACTION_CHANGE
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"action change", // EVENT_ACTION_CHANGE
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"accelerator change", // EVENT_ACCELERATOR_CHANGE
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"selection", // EVENT_SELECTION
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"selection add", // EVENT_SELECTION_ADD
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"selection remove", // EVENT_SELECTION_REMOVE
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"selection within", // EVENT_SELECTION_WITHIN
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"alert", // EVENT_ALERT
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"foreground", // EVENT_FOREGROUND
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"menu start", // EVENT_MENU_START
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"menu end", // EVENT_MENU_END
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"menupopup start", // EVENT_MENUPOPUP_START
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"menupopup end", // EVENT_MENUPOPUP_END
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"capture start", // EVENT_CAPTURE_START
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"capture end", // EVENT_CAPTURE_END
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"movesize start", // EVENT_MOVESIZE_START
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"movesize end", // EVENT_MOVESIZE_END
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"contexthelp start", // EVENT_CONTEXTHELP_START
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"contexthelp end", // EVENT_CONTEXTHELP_END
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"dragdrop start", // EVENT_DRAGDROP_START
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"dragdrop end", // EVENT_DRAGDROP_END
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"dialog start", // EVENT_DIALOG_START
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"dialog end", // EVENT_DIALOG_END
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"scrolling start", // EVENT_SCROLLING_START
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"scrolling end", // EVENT_SCROLLING_END
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"minimize start", // EVENT_MINIMIZE_START
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"minimize end", // EVENT_MINIMIZE_END
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"document load complete", // EVENT_DOCUMENT_LOAD_COMPLETE
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"document reload", // EVENT_DOCUMENT_RELOAD
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"document load stopped", // EVENT_DOCUMENT_LOAD_STOPPED
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"document attributes changed", // EVENT_DOCUMENT_ATTRIBUTES_CHANGED
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"document content changed", // EVENT_DOCUMENT_CONTENT_CHANGED
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"property changed", // EVENT_PROPERTY_CHANGED
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"page changed", // EVENT_PAGE_CHANGED
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"text attribute changed", // EVENT_TEXT_ATTRIBUTE_CHANGED
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"text caret moved", // EVENT_TEXT_CARET_MOVED
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"text changed", // EVENT_TEXT_CHANGED
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"text inserted", // EVENT_TEXT_INSERTED
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"text removed", // EVENT_TEXT_REMOVED
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"text updated", // EVENT_TEXT_UPDATED
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"text selection changed", // EVENT_TEXT_SELECTION_CHANGED
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"visible data changed", // EVENT_VISIBLE_DATA_CHANGED
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"text column changed", // EVENT_TEXT_COLUMN_CHANGED
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"section changed", // EVENT_SECTION_CHANGED
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"table caption changed", // EVENT_TABLE_CAPTION_CHANGED
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"table model changed", // EVENT_TABLE_MODEL_CHANGED
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"table summary changed", // EVENT_TABLE_SUMMARY_CHANGED
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"table row description changed", // EVENT_TABLE_ROW_DESCRIPTION_CHANGED
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"table row header changed", // EVENT_TABLE_ROW_HEADER_CHANGED
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"table row insert", // EVENT_TABLE_ROW_INSERT
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"table row delete", // EVENT_TABLE_ROW_DELETE
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"table row reorder", // EVENT_TABLE_ROW_REORDER
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"table column description changed", // EVENT_TABLE_COLUMN_DESCRIPTION_CHANGED
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"table column header changed", // EVENT_TABLE_COLUMN_HEADER_CHANGED
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"table column insert", // EVENT_TABLE_COLUMN_INSERT
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"table column delete", // EVENT_TABLE_COLUMN_DELETE
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"table column reorder", // EVENT_TABLE_COLUMN_REORDER
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"window activate", // EVENT_WINDOW_ACTIVATE
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"window create", // EVENT_WINDOW_CREATE
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"window deactivate", // EVENT_WINDOW_DEACTIVATE
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"window destroy", // EVENT_WINDOW_DESTROY
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"window maximize", // EVENT_WINDOW_MAXIMIZE
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"window minimize", // EVENT_WINDOW_MINIMIZE
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"window resize", // EVENT_WINDOW_RESIZE
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"window restore", // EVENT_WINDOW_RESTORE
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"hyperlink end index changed", // EVENT_HYPERLINK_END_INDEX_CHANGED
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"hyperlink number of anchors changed", // EVENT_HYPERLINK_NUMBER_OF_ANCHORS_CHANGED
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"hyperlink selected link changed", // EVENT_HYPERLINK_SELECTED_LINK_CHANGED
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"hypertext link activated", // EVENT_HYPERTEXT_LINK_ACTIVATED
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"hypertext link selected", // EVENT_HYPERTEXT_LINK_SELECTED
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"hyperlink start index changed", // EVENT_HYPERLINK_START_INDEX_CHANGED
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"hypertext changed", // EVENT_HYPERTEXT_CHANGED
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"hypertext links count changed", // EVENT_HYPERTEXT_NLINKS_CHANGED
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"object attribute changed", // EVENT_OBJECT_ATTRIBUTE_CHANGED
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"virtual cursor changed", // EVENT_VIRTUALCURSOR_CHANGED
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"text value change", // EVENT_TEXT_VALUE_CHANGE
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};
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#endif /* __nsIAccessibilityService_h__ */
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