diff options
Diffstat (limited to 'accessible/xpcom/xpcAccessibleHyperText.cpp')
| -rw-r--r-- | accessible/xpcom/xpcAccessibleHyperText.cpp | 703 |
1 files changed, 703 insertions, 0 deletions
diff --git a/accessible/xpcom/xpcAccessibleHyperText.cpp b/accessible/xpcom/xpcAccessibleHyperText.cpp new file mode 100644 index 0000000000..65ef3cd46c --- /dev/null +++ b/accessible/xpcom/xpcAccessibleHyperText.cpp @@ -0,0 +1,703 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=2 et sw=2 tw=80: */ +/* 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 "xpcAccessibleHyperText.h" + +#include "LocalAccessible-inl.h" +#include "HyperTextAccessible-inl.h" +#include "mozilla/a11y/PDocAccessible.h" +#include "mozilla/StaticPrefs_accessibility.h" +#include "TextRange.h" +#include "AccAttributes.h" +#include "nsComponentManagerUtils.h" +#include "nsPersistentProperties.h" +#include "xpcAccessibleDocument.h" +#include "xpcAccessibleTextRange.h" + +#include "nsIMutableArray.h" + +using namespace mozilla::a11y; + +//////////////////////////////////////////////////////////////////////////////// +// nsISupports + +NS_INTERFACE_MAP_BEGIN(xpcAccessibleHyperText) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleText, + mSupportedIfaces & eText) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleEditableText, + mSupportedIfaces & eText) + NS_INTERFACE_MAP_ENTRY_CONDITIONAL(nsIAccessibleHyperText, + mSupportedIfaces & eText) +NS_INTERFACE_MAP_END_INHERITING(xpcAccessibleGeneric) + +NS_IMPL_ADDREF_INHERITED(xpcAccessibleHyperText, xpcAccessibleGeneric) +NS_IMPL_RELEASE_INHERITED(xpcAccessibleHyperText, xpcAccessibleGeneric) + +//////////////////////////////////////////////////////////////////////////////// +// nsIAccessibleText + +NS_IMETHODIMP +xpcAccessibleHyperText::GetCharacterCount(int32_t* aCharacterCount) { + NS_ENSURE_ARG_POINTER(aCharacterCount); + *aCharacterCount = 0; + + if (!mIntl) return NS_ERROR_FAILURE; + +#if defined(XP_WIN) + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } +#endif + + *aCharacterCount = static_cast<int32_t>(Intl()->CharacterCount()); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetText(int32_t aStartOffset, int32_t aEndOffset, + nsAString& aText) { + aText.Truncate(); + + if (!mIntl) return NS_ERROR_FAILURE; + + Intl()->TextSubstring(aStartOffset, aEndOffset, aText); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetTextBeforeOffset( + int32_t aOffset, AccessibleTextBoundary aBoundaryType, + int32_t* aStartOffset, int32_t* aEndOffset, nsAString& aText) { + NS_ENSURE_ARG_POINTER(aStartOffset); + NS_ENSURE_ARG_POINTER(aEndOffset); + *aStartOffset = *aEndOffset = 0; + aText.Truncate(); + + if (!mIntl) return NS_ERROR_FAILURE; + + Intl()->TextBeforeOffset(aOffset, aBoundaryType, aStartOffset, aEndOffset, + aText); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetTextAtOffset(int32_t aOffset, + AccessibleTextBoundary aBoundaryType, + int32_t* aStartOffset, + int32_t* aEndOffset, nsAString& aText) { + NS_ENSURE_ARG_POINTER(aStartOffset); + NS_ENSURE_ARG_POINTER(aEndOffset); + *aStartOffset = *aEndOffset = 0; + aText.Truncate(); + + if (!mIntl) return NS_ERROR_FAILURE; + + Intl()->TextAtOffset(aOffset, aBoundaryType, aStartOffset, aEndOffset, aText); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetTextAfterOffset(int32_t aOffset, + AccessibleTextBoundary aBoundaryType, + int32_t* aStartOffset, + int32_t* aEndOffset, + nsAString& aText) { + NS_ENSURE_ARG_POINTER(aStartOffset); + NS_ENSURE_ARG_POINTER(aEndOffset); + *aStartOffset = *aEndOffset = 0; + aText.Truncate(); + + Intl()->TextAfterOffset(aOffset, aBoundaryType, aStartOffset, aEndOffset, + aText); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetCharacterAtOffset(int32_t aOffset, + char16_t* aCharacter) { + NS_ENSURE_ARG_POINTER(aCharacter); + *aCharacter = L'\0'; + + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + *aCharacter = IntlLocal()->CharAt(aOffset); + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + *aCharacter = mIntl->AsRemote()->CharAt(aOffset); +#endif + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetTextAttributes( + bool aIncludeDefAttrs, int32_t aOffset, int32_t* aStartOffset, + int32_t* aEndOffset, nsIPersistentProperties** aAttributes) { + NS_ENSURE_ARG_POINTER(aStartOffset); + NS_ENSURE_ARG_POINTER(aEndOffset); + NS_ENSURE_ARG_POINTER(aAttributes); + *aStartOffset = *aEndOffset = 0; + *aAttributes = nullptr; + + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } + + RefPtr<AccAttributes> attributes = Intl()->TextAttributes( + aIncludeDefAttrs, aOffset, aStartOffset, aEndOffset); + RefPtr<nsPersistentProperties> props = new nsPersistentProperties(); + nsAutoString unused; + for (auto iter : *attributes) { + nsAutoString name; + iter.NameAsString(name); + + nsAutoString value; + iter.ValueAsString(value); + + props->SetStringProperty(NS_ConvertUTF16toUTF8(name), value, unused); + } + + props.forget(aAttributes); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetDefaultTextAttributes( + nsIPersistentProperties** aAttributes) { + NS_ENSURE_ARG_POINTER(aAttributes); + *aAttributes = nullptr; + + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } + + RefPtr<AccAttributes> attributes = Intl()->DefaultTextAttributes(); + RefPtr<nsPersistentProperties> props = new nsPersistentProperties(); + nsAutoString unused; + for (auto iter : *attributes) { + nsAutoString name; + iter.NameAsString(name); + + nsAutoString value; + iter.ValueAsString(value); + + props->SetStringProperty(NS_ConvertUTF16toUTF8(name), value, unused); + } + + props.forget(aAttributes); + + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetCharacterExtents(int32_t aOffset, int32_t* aX, + int32_t* aY, int32_t* aWidth, + int32_t* aHeight, + uint32_t aCoordType) { + NS_ENSURE_ARG_POINTER(aX); + NS_ENSURE_ARG_POINTER(aY); + NS_ENSURE_ARG_POINTER(aWidth); + NS_ENSURE_ARG_POINTER(aHeight); + *aX = *aY = *aWidth = *aHeight; + + if (!mIntl) return NS_ERROR_FAILURE; + +#if defined(XP_WIN) + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } +#endif + + LayoutDeviceIntRect rect = Intl()->CharBounds(aOffset, aCoordType); + rect.GetRect(aX, aY, aWidth, aHeight); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetRangeExtents(int32_t aStartOffset, + int32_t aEndOffset, int32_t* aX, + int32_t* aY, int32_t* aWidth, + int32_t* aHeight, uint32_t aCoordType) { + NS_ENSURE_ARG_POINTER(aX); + NS_ENSURE_ARG_POINTER(aY); + NS_ENSURE_ARG_POINTER(aWidth); + NS_ENSURE_ARG_POINTER(aHeight); + *aX = *aY = *aWidth = *aHeight = 0; + + if (!mIntl) return NS_ERROR_FAILURE; + +#if defined(XP_WIN) + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } +#endif + + LayoutDeviceIntRect rect = + Intl()->TextBounds(aStartOffset, aEndOffset, aCoordType); + rect.GetRect(aX, aY, aWidth, aHeight); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetOffsetAtPoint(int32_t aX, int32_t aY, + uint32_t aCoordType, + int32_t* aOffset) { + NS_ENSURE_ARG_POINTER(aOffset); + *aOffset = -1; + + if (!mIntl) return NS_ERROR_FAILURE; + + *aOffset = Intl()->OffsetAtPoint(aX, aY, aCoordType); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetCaretOffset(int32_t* aCaretOffset) { + NS_ENSURE_ARG_POINTER(aCaretOffset); + *aCaretOffset = -1; + + if (!mIntl) return NS_ERROR_FAILURE; + + *aCaretOffset = Intl()->CaretOffset(); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::SetCaretOffset(int32_t aCaretOffset) { + if (!mIntl) return NS_ERROR_FAILURE; + + Intl()->SetCaretOffset(aCaretOffset); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetSelectionCount(int32_t* aSelectionCount) { + NS_ENSURE_ARG_POINTER(aSelectionCount); + *aSelectionCount = 0; + + if (!mIntl) return NS_ERROR_FAILURE; + +#if defined(XP_WIN) + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } +#endif + + *aSelectionCount = Intl()->SelectionCount(); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetSelectionBounds(int32_t aSelectionNum, + int32_t* aStartOffset, + int32_t* aEndOffset) { + NS_ENSURE_ARG_POINTER(aStartOffset); + NS_ENSURE_ARG_POINTER(aEndOffset); + *aStartOffset = *aEndOffset = 0; + + if (!mIntl) return NS_ERROR_FAILURE; + + if (aSelectionNum < 0) return NS_ERROR_INVALID_ARG; + + if (mIntl->IsLocal() || + StaticPrefs::accessibility_cache_enabled_AtStartup()) { + if (aSelectionNum >= Intl()->SelectionCount()) { + return NS_ERROR_INVALID_ARG; + } + + Intl()->SelectionBoundsAt(aSelectionNum, aStartOffset, aEndOffset); + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + nsString unused; + mIntl->AsRemote()->SelectionBoundsAt(aSelectionNum, unused, aStartOffset, + aEndOffset); +#endif + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::SetSelectionBounds(int32_t aSelectionNum, + int32_t aStartOffset, + int32_t aEndOffset) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (aSelectionNum < 0) return NS_ERROR_INVALID_ARG; + + if (mIntl->IsLocal()) { + if (!IntlLocal()->SetSelectionBoundsAt(aSelectionNum, aStartOffset, + aEndOffset)) { + return NS_ERROR_INVALID_ARG; + } + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + if (!mIntl->AsRemote()->SetSelectionBoundsAt(aSelectionNum, aStartOffset, + aEndOffset)) { + return NS_ERROR_INVALID_ARG; + } +#endif + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::AddSelection(int32_t aStartOffset, int32_t aEndOffset) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->AddToSelection(aStartOffset, aEndOffset); + } else { + mIntl->AsRemote()->AddToSelection(aStartOffset, aEndOffset); + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::RemoveSelection(int32_t aSelectionNum) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->RemoveFromSelection(aSelectionNum); + } else { + mIntl->AsRemote()->RemoveFromSelection(aSelectionNum); + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::ScrollSubstringTo(int32_t aStartOffset, + int32_t aEndOffset, + uint32_t aScrollType) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->ScrollSubstringTo(aStartOffset, aEndOffset, aScrollType); + } else { + mIntl->AsRemote()->ScrollSubstringTo(aStartOffset, aEndOffset, aScrollType); + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::ScrollSubstringToPoint(int32_t aStartOffset, + int32_t aEndOffset, + uint32_t aCoordinateType, + int32_t aX, int32_t aY) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->ScrollSubstringToPoint(aStartOffset, aEndOffset, + aCoordinateType, aX, aY); + } else { + mIntl->AsRemote()->ScrollSubstringToPoint(aStartOffset, aEndOffset, + aCoordinateType, aX, aY); + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetEnclosingRange(nsIAccessibleTextRange** aRange) { + NS_ENSURE_ARG_POINTER(aRange); + *aRange = nullptr; + + if (!IntlLocal()) return NS_ERROR_FAILURE; + + TextRange range; + IntlLocal()->EnclosingRange(range); + NS_ASSERTION(range.IsValid(), "Should always have an enclosing range!"); + RefPtr<xpcAccessibleTextRange> xpcRange = new xpcAccessibleTextRange(range); + + xpcRange.forget(aRange); + + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetSelectionRanges(nsIArray** aRanges) { + NS_ENSURE_ARG_POINTER(aRanges); + *aRanges = nullptr; + + if (!IntlLocal() && !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_FAILURE; + } + + nsresult rv = NS_OK; + nsCOMPtr<nsIMutableArray> xpcRanges = + do_CreateInstance(NS_ARRAY_CONTRACTID, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + AutoTArray<TextRange, 1> ranges; + Intl()->SelectionRanges(&ranges); + uint32_t len = ranges.Length(); + for (uint32_t idx = 0; idx < len; idx++) { + xpcRanges->AppendElement(new xpcAccessibleTextRange(ranges[idx])); + } + + xpcRanges.forget(aRanges); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetVisibleRanges(nsIArray** aRanges) { + NS_ENSURE_ARG_POINTER(aRanges); + *aRanges = nullptr; + + if (!IntlLocal()) return NS_ERROR_FAILURE; + + nsresult rv = NS_OK; + nsCOMPtr<nsIMutableArray> xpcRanges = + do_CreateInstance(NS_ARRAY_CONTRACTID, &rv); + NS_ENSURE_SUCCESS(rv, rv); + + nsTArray<TextRange> ranges; + IntlLocal()->VisibleRanges(&ranges); + uint32_t len = ranges.Length(); + for (uint32_t idx = 0; idx < len; idx++) { + xpcRanges->AppendElement(new xpcAccessibleTextRange(ranges[idx])); + } + + xpcRanges.forget(aRanges); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetRangeByChild(nsIAccessible* aChild, + nsIAccessibleTextRange** aRange) { + NS_ENSURE_ARG_POINTER(aRange); + *aRange = nullptr; + + if (!IntlLocal()) return NS_ERROR_FAILURE; + + LocalAccessible* child = aChild->ToInternalAccessible(); + if (child) { + TextRange range; + IntlLocal()->RangeByChild(child, range); + if (range.IsValid()) { + RefPtr<xpcAccessibleTextRange> xpcRange = + new xpcAccessibleTextRange(range); + xpcRange.forget(aRange); + } + } + + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetRangeAtPoint(int32_t aX, int32_t aY, + nsIAccessibleTextRange** aRange) { + NS_ENSURE_ARG_POINTER(aRange); + *aRange = nullptr; + + if (!IntlLocal()) return NS_ERROR_FAILURE; + + TextRange range; + IntlLocal()->RangeAtPoint(aX, aY, range); + if (range.IsValid()) { + RefPtr<xpcAccessibleTextRange> xpcRange = new xpcAccessibleTextRange(range); + xpcRange.forget(aRange); + } + + return NS_OK; +} + +//////////////////////////////////////////////////////////////////////////////// +// nsIAccessibleEditableText + +NS_IMETHODIMP +xpcAccessibleHyperText::SetTextContents(const nsAString& aText) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->ReplaceText(aText); + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + nsString text(aText); + mIntl->AsRemote()->ReplaceText(text); +#endif + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::InsertText(const nsAString& aText, int32_t aOffset) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->InsertText(aText, aOffset); + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + nsString text(aText); + mIntl->AsRemote()->InsertText(text, aOffset); +#endif + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::CopyText(int32_t aStartOffset, int32_t aEndOffset) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->CopyText(aStartOffset, aEndOffset); + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + mIntl->AsRemote()->CopyText(aStartOffset, aEndOffset); +#endif + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::CutText(int32_t aStartOffset, int32_t aEndOffset) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->CutText(aStartOffset, aEndOffset); + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + mIntl->AsRemote()->CutText(aStartOffset, aEndOffset); +#endif + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::DeleteText(int32_t aStartOffset, int32_t aEndOffset) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + IntlLocal()->DeleteText(aStartOffset, aEndOffset); + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + mIntl->AsRemote()->DeleteText(aStartOffset, aEndOffset); +#endif + } + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::PasteText(int32_t aOffset) { + if (!mIntl) return NS_ERROR_FAILURE; + + if (mIntl->IsLocal()) { + RefPtr<HyperTextAccessible> acc = IntlLocal(); + acc->PasteText(aOffset); + } else { +#if defined(XP_WIN) + return NS_ERROR_NOT_IMPLEMENTED; +#else + mIntl->AsRemote()->PasteText(aOffset); +#endif + } + return NS_OK; +} + +//////////////////////////////////////////////////////////////////////////////// +// nsIAccessibleHyperText + +NS_IMETHODIMP +xpcAccessibleHyperText::GetLinkCount(int32_t* aLinkCount) { + NS_ENSURE_ARG_POINTER(aLinkCount); + *aLinkCount = 0; + + if (!mIntl) return NS_ERROR_FAILURE; + +#if defined(XP_WIN) + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } +#endif + + *aLinkCount = static_cast<int32_t>(Intl()->LinkCount()); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetLinkAt(int32_t aIndex, + nsIAccessibleHyperLink** aLink) { + NS_ENSURE_ARG_POINTER(aLink); + *aLink = nullptr; + + if (!mIntl) return NS_ERROR_FAILURE; + +#if defined(XP_WIN) + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } +#endif + + NS_IF_ADDREF(*aLink = ToXPC(Intl()->LinkAt(aIndex))); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetLinkIndex(nsIAccessibleHyperLink* aLink, + int32_t* aIndex) { + NS_ENSURE_ARG_POINTER(aLink); + NS_ENSURE_ARG_POINTER(aIndex); + *aIndex = -1; + + if (!mIntl) return NS_ERROR_FAILURE; + + nsCOMPtr<nsIAccessible> xpcLink(do_QueryInterface(aLink)); + Accessible* accLink = xpcLink->ToInternalGeneric(); +#if defined(XP_WIN) + if (accLink->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } +#endif + *aIndex = Intl()->LinkIndexOf(accLink); + return NS_OK; +} + +NS_IMETHODIMP +xpcAccessibleHyperText::GetLinkIndexAtOffset(int32_t aOffset, + int32_t* aLinkIndex) { + NS_ENSURE_ARG_POINTER(aLinkIndex); + *aLinkIndex = -1; // API says this magic value means 'not found' + + if (!mIntl) return NS_ERROR_FAILURE; + +#if defined(XP_WIN) + if (mIntl->IsRemote() && + !StaticPrefs::accessibility_cache_enabled_AtStartup()) { + return NS_ERROR_NOT_IMPLEMENTED; + } +#endif + + *aLinkIndex = Intl()->LinkIndexAtOffset(aOffset); + return NS_OK; +} |