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convert MOZ_OVERRIDE override
convert MOZ_FINAL final
146 lines
3.9 KiB
C++
146 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=2 et sw=2 tw=80: */
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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 _nsAccessiblePivot_H_
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#define _nsAccessiblePivot_H_
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#include "nsIAccessiblePivot.h"
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#include "Accessible-inl.h"
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#include "nsAutoPtr.h"
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#include "nsTObserverArray.h"
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#include "nsCycleCollectionParticipant.h"
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#include "mozilla/Attributes.h"
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class RuleCache;
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/**
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* Class represents an accessible pivot.
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*/
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class nsAccessiblePivot final : public nsIAccessiblePivot
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{
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public:
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typedef mozilla::a11y::Accessible Accessible;
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explicit nsAccessiblePivot(Accessible* aRoot);
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(nsAccessiblePivot, nsIAccessiblePivot)
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NS_DECL_NSIACCESSIBLEPIVOT
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/*
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* A simple getter for the pivot's position.
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*/
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Accessible* Position() { return mPosition; }
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private:
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~nsAccessiblePivot();
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nsAccessiblePivot() = delete;
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nsAccessiblePivot(const nsAccessiblePivot&) = delete;
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void operator = (const nsAccessiblePivot&) = delete;
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/*
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* Notify all observers on a pivot change. Return true if it has changed and
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* observers have been notified.
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*/
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bool NotifyOfPivotChange(Accessible* aOldAccessible,
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int32_t aOldStart, int32_t aOldEnd,
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PivotMoveReason aReason,
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bool aIsFromUserInput);
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/*
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* Check to see that the given accessible is a descendant of given ancestor
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*/
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bool IsDescendantOf(Accessible* aAccessible, Accessible* aAncestor);
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/*
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* Search in preorder for the first accessible to match the rule.
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*/
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Accessible* SearchForward(Accessible* aAccessible,
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nsIAccessibleTraversalRule* aRule,
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bool aSearchCurrent,
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nsresult* aResult);
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/*
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* Reverse search in preorder for the first accessible to match the rule.
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*/
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Accessible* SearchBackward(Accessible* aAccessible,
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nsIAccessibleTraversalRule* aRule,
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bool aSearchCurrent,
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nsresult* aResult);
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/*
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* Search in preorder for the first text accessible.
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*/
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mozilla::a11y::HyperTextAccessible* SearchForText(Accessible* aAccessible,
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bool aBackward);
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/*
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* Get the effective root for this pivot, either the true root or modal root.
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*/
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Accessible* GetActiveRoot() const
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{
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if (mModalRoot) {
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NS_ENSURE_FALSE(mModalRoot->IsDefunct(), mRoot);
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return mModalRoot;
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}
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return mRoot;
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}
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/*
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* Update the pivot, and notify observers. Return true if it moved.
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*/
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bool MovePivotInternal(Accessible* aPosition, PivotMoveReason aReason,
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bool aIsFromUserInput);
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/*
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* Get initial node we should start a search from with a given rule.
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*
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* When we do a move operation from one position to another,
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* the initial position can be inside of a subtree that is ignored by
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* the given rule. We need to step out of the ignored subtree and start
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* the search from there.
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*
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*/
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Accessible* AdjustStartPosition(Accessible* aAccessible, RuleCache& aCache,
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uint16_t* aFilterResult, nsresult* aResult);
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/*
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* The root accessible.
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*/
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nsRefPtr<Accessible> mRoot;
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/*
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* The temporary modal root accessible.
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*/
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nsRefPtr<Accessible> mModalRoot;
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/*
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* The current pivot position.
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*/
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nsRefPtr<Accessible> mPosition;
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/*
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* The text start offset ofthe pivot.
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*/
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int32_t mStartOffset;
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/*
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* The text end offset ofthe pivot.
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*/
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int32_t mEndOffset;
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/*
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* The list of pivot-changed observers.
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*/
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nsTObserverArray<nsCOMPtr<nsIAccessiblePivotObserver> > mObservers;
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};
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#endif
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