129 lines
4.6 KiB
C++
129 lines
4.6 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_a11y_UiaTextRange_h__
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#define mozilla_a11y_UiaTextRange_h__
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#include "IUnknownImpl.h"
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#include "MsaaAccessible.h"
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#include "mozilla/Assertions.h"
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#include "mozilla/RefPtr.h"
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#include "nsDirection.h"
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#include "objbase.h"
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#include "uiautomation.h"
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namespace mozilla::a11y {
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class TextLeafRange;
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class TextLeafPoint;
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/**
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* ITextRangeProvider implementation.
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*/
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class UiaTextRange : public ITextRangeProvider {
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public:
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explicit UiaTextRange(const TextLeafRange& aRange);
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virtual ~UiaTextRange() = default;
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// IUnknown
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DECL_IUNKNOWN
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// ITextRangeProvider
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virtual HRESULT STDMETHODCALLTYPE Clone(
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/* [retval][out] */ __RPC__deref_out_opt ITextRangeProvider** aRetVal);
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virtual HRESULT STDMETHODCALLTYPE Compare(
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/* [in] */ __RPC__in_opt ITextRangeProvider* aRange,
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/* [retval][out] */ __RPC__out BOOL* aRetVal);
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virtual HRESULT STDMETHODCALLTYPE CompareEndpoints(
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/* [in] */ enum TextPatternRangeEndpoint aEndpoint,
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/* [in] */ __RPC__in_opt ITextRangeProvider* aTargetRange,
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/* [in] */ enum TextPatternRangeEndpoint aTargetEndpoint,
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/* [retval][out] */ __RPC__out int* aRetVal);
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virtual HRESULT STDMETHODCALLTYPE ExpandToEnclosingUnit(
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/* [in] */ enum TextUnit aUnit);
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virtual HRESULT STDMETHODCALLTYPE FindAttribute(
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/* [in] */ TEXTATTRIBUTEID aAttributeId,
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/* [in] */ VARIANT aVal,
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/* [in] */ BOOL aBackward,
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/* [retval][out] */ __RPC__deref_out_opt ITextRangeProvider** aRetVal);
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virtual HRESULT STDMETHODCALLTYPE FindText(
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/* [in] */ __RPC__in BSTR aText,
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/* [in] */ BOOL aBackward,
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/* [in] */ BOOL aIgnoreCase,
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/* [retval][out] */ __RPC__deref_out_opt ITextRangeProvider** aRetVal);
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virtual HRESULT STDMETHODCALLTYPE GetAttributeValue(
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/* [in] */ TEXTATTRIBUTEID aAttributeId,
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/* [retval][out] */ __RPC__out VARIANT* aRetVal);
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virtual HRESULT STDMETHODCALLTYPE GetBoundingRectangles(
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/* [retval][out] */ __RPC__deref_out_opt SAFEARRAY** aRetVal);
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virtual HRESULT STDMETHODCALLTYPE GetEnclosingElement(
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/* [retval][out] */ __RPC__deref_out_opt IRawElementProviderSimple**
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aRetVal);
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virtual HRESULT STDMETHODCALLTYPE GetText(
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/* [in] */ int aMaxLength,
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/* [retval][out] */ __RPC__deref_out_opt BSTR* aRetVal);
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virtual HRESULT STDMETHODCALLTYPE Move(
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/* [in] */ enum TextUnit aUnit,
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/* [in] */ int aCount,
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/* [retval][out] */ __RPC__out int* aRetVal);
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virtual HRESULT STDMETHODCALLTYPE MoveEndpointByUnit(
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/* [in] */ enum TextPatternRangeEndpoint aEndpoint,
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/* [in] */ enum TextUnit aUnit,
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/* [in] */ int aCount,
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/* [retval][out] */ __RPC__out int* aRetVal);
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virtual HRESULT STDMETHODCALLTYPE MoveEndpointByRange(
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/* [in] */ enum TextPatternRangeEndpoint aEndpoint,
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/* [in] */ __RPC__in_opt ITextRangeProvider* aTargetRange,
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/* [in] */ enum TextPatternRangeEndpoint aTargetEndpoint);
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virtual HRESULT STDMETHODCALLTYPE Select(void);
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virtual HRESULT STDMETHODCALLTYPE AddToSelection(void);
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virtual HRESULT STDMETHODCALLTYPE RemoveFromSelection(void);
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virtual HRESULT STDMETHODCALLTYPE ScrollIntoView(
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/* [in] */ BOOL aAlignToTop);
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virtual HRESULT STDMETHODCALLTYPE GetChildren(
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/* [retval][out] */ __RPC__deref_out_opt SAFEARRAY** aRetVal);
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private:
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void SetRange(const TextLeafRange& aRange);
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TextLeafRange GetRange() const;
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static TextLeafRange GetRangeFrom(ITextRangeProvider* aProvider);
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static TextLeafPoint FindBoundary(const TextLeafPoint& aOrigin,
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enum TextUnit aUnit, nsDirection aDirection,
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bool aIncludeOrigin = false);
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bool MovePoint(TextLeafPoint& aPoint, enum TextUnit aUnit,
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const int aRequestedCount, int& aActualCount);
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void SetEndpoint(enum TextPatternRangeEndpoint aEndpoint,
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const TextLeafPoint& aDest);
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// Accessible doesn't support strong references and so neither does
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// TextLeafRange. Therefore, we hold strong references to MsaaAccessibles. We
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// combine those with offsets to reconstitute the TextLeafRange later.
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RefPtr<MsaaAccessible> mStartAcc;
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int32_t mStartOffset = -1;
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RefPtr<MsaaAccessible> mEndAcc;
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int32_t mEndOffset = -1;
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bool mIsEndOfLineInsertionPoint = false;
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};
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} // namespace mozilla::a11y
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#endif
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