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-rw-r--r--accessible/windows/ia2/ia2AccessibleText.cpp481
1 files changed, 481 insertions, 0 deletions
diff --git a/accessible/windows/ia2/ia2AccessibleText.cpp b/accessible/windows/ia2/ia2AccessibleText.cpp
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index 0000000000..4e81ccd18d
--- /dev/null
+++ b/accessible/windows/ia2/ia2AccessibleText.cpp
@@ -0,0 +1,481 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim:expandtab:shiftwidth=2:tabstop=2:
+ */
+/* 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 "ia2Accessible.h"
+#include "ia2AccessibleHypertext.h"
+#include "ia2AccessibleText.h"
+
+#include "AccessibleText_i.c"
+
+#include "HyperTextAccessibleWrap.h"
+#include "HyperTextAccessible-inl.h"
+#include "mozilla/ClearOnShutdown.h"
+
+using namespace mozilla::a11y;
+
+HyperTextAccessibleBase* ia2AccessibleText::sLastTextChangeAcc = nullptr;
+mozilla::StaticAutoPtr<nsString> ia2AccessibleText::sLastTextChangeString;
+uint32_t ia2AccessibleText::sLastTextChangeStart = 0;
+uint32_t ia2AccessibleText::sLastTextChangeEnd = 0;
+bool ia2AccessibleText::sLastTextChangeWasInsert = false;
+
+HyperTextAccessibleBase* ia2AccessibleText::TextAcc() {
+ auto hyp = static_cast<ia2AccessibleHypertext*>(this);
+ Accessible* acc = hyp->Acc();
+ return acc ? acc->AsHyperTextBase() : nullptr;
+}
+
+std::pair<HyperTextAccessibleWrap*, HRESULT> ia2AccessibleText::LocalTextAcc() {
+ auto hyp = static_cast<ia2AccessibleHypertext*>(this);
+ Accessible* acc = hyp->Acc();
+ if (!acc) {
+ return {nullptr, CO_E_OBJNOTCONNECTED};
+ }
+ auto localAcc = static_cast<AccessibleWrap*>(acc->AsLocal());
+ if (!localAcc) {
+ return {nullptr, E_NOTIMPL};
+ }
+ return {static_cast<HyperTextAccessibleWrap*>(localAcc), S_OK};
+}
+
+// IAccessibleText
+
+STDMETHODIMP
+ia2AccessibleText::addSelection(long aStartOffset, long aEndOffset) {
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ return textAcc->AddToSelection(aStartOffset, aEndOffset) ? S_OK
+ : E_INVALIDARG;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_attributes(long aOffset, long* aStartOffset,
+ long* aEndOffset, BSTR* aTextAttributes) {
+ if (!aStartOffset || !aEndOffset || !aTextAttributes) return E_INVALIDARG;
+
+ *aStartOffset = 0;
+ *aEndOffset = 0;
+ *aTextAttributes = nullptr;
+
+ int32_t startOffset = 0, endOffset = 0;
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ RefPtr<AccAttributes> attributes =
+ textAcc->TextAttributes(true, aOffset, &startOffset, &endOffset);
+
+ HRESULT hr =
+ ia2Accessible::ConvertToIA2Attributes(attributes, aTextAttributes);
+ if (FAILED(hr)) return hr;
+
+ *aStartOffset = startOffset;
+ *aEndOffset = endOffset;
+
+ return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_caretOffset(long* aOffset) {
+ if (!aOffset) return E_INVALIDARG;
+
+ *aOffset = -1;
+
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ *aOffset = textAcc->CaretOffset();
+
+ return *aOffset != -1 ? S_OK : S_FALSE;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_characterExtents(long aOffset,
+ enum IA2CoordinateType aCoordType,
+ long* aX, long* aY, long* aWidth,
+ long* aHeight) {
+ if (!aX || !aY || !aWidth || !aHeight) return E_INVALIDARG;
+ *aX = *aY = *aWidth = *aHeight = 0;
+
+ uint32_t geckoCoordType =
+ (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
+ ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+ : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+ LayoutDeviceIntRect rect;
+ auto textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ rect = textAcc->CharBounds(aOffset, geckoCoordType);
+
+ // Can't use GetRect() because of long vs. int32_t mismatch
+ *aX = rect.X();
+ *aY = rect.Y();
+ *aWidth = rect.Width();
+ *aHeight = rect.Height();
+ return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_nSelections(long* aNSelections) {
+ if (!aNSelections) return E_INVALIDARG;
+ *aNSelections = 0;
+
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ *aNSelections = textAcc->SelectionCount();
+
+ return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_offsetAtPoint(long aX, long aY,
+ enum IA2CoordinateType aCoordType,
+ long* aOffset) {
+ if (!aOffset) return E_INVALIDARG;
+ *aOffset = 0;
+
+ uint32_t geckoCoordType =
+ (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
+ ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+ : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ *aOffset = textAcc->OffsetAtPoint(aX, aY, geckoCoordType);
+
+ return *aOffset == -1 ? S_FALSE : S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_selection(long aSelectionIndex, long* aStartOffset,
+ long* aEndOffset) {
+ if (!aStartOffset || !aEndOffset) return E_INVALIDARG;
+ *aStartOffset = *aEndOffset = 0;
+
+ int32_t startOffset = 0, endOffset = 0;
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ if (!textAcc->SelectionBoundsAt(aSelectionIndex, &startOffset, &endOffset)) {
+ return E_INVALIDARG;
+ }
+
+ *aStartOffset = startOffset;
+ *aEndOffset = endOffset;
+ return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_text(long aStartOffset, long aEndOffset, BSTR* aText) {
+ if (!aText) return E_INVALIDARG;
+
+ *aText = nullptr;
+
+ nsAutoString text;
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ if (!textAcc->IsValidRange(aStartOffset, aEndOffset)) {
+ return E_INVALIDARG;
+ }
+
+ textAcc->TextSubstring(aStartOffset, aEndOffset, text);
+
+ if (text.IsEmpty()) return S_FALSE;
+
+ *aText = ::SysAllocStringLen(text.get(), text.Length());
+ return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_textBeforeOffset(long aOffset,
+ enum IA2TextBoundaryType aBoundaryType,
+ long* aStartOffset, long* aEndOffset,
+ BSTR* aText) {
+ if (!aStartOffset || !aEndOffset || !aText) return E_INVALIDARG;
+
+ *aStartOffset = *aEndOffset = 0;
+ *aText = nullptr;
+
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+ nsAutoString text;
+ int32_t startOffset = 0, endOffset = 0;
+
+ if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
+ startOffset = 0;
+ endOffset = textAcc->CharacterCount();
+ textAcc->TextSubstring(startOffset, endOffset, text);
+ } else {
+ AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
+ if (boundaryType == -1) return S_FALSE;
+
+ textAcc->TextBeforeOffset(aOffset, boundaryType, &startOffset, &endOffset,
+ text);
+ }
+
+ *aStartOffset = startOffset;
+ *aEndOffset = endOffset;
+
+ if (text.IsEmpty()) return S_FALSE;
+
+ *aText = ::SysAllocStringLen(text.get(), text.Length());
+ return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_textAfterOffset(long aOffset,
+ enum IA2TextBoundaryType aBoundaryType,
+ long* aStartOffset, long* aEndOffset,
+ BSTR* aText) {
+ if (!aStartOffset || !aEndOffset || !aText) return E_INVALIDARG;
+
+ *aStartOffset = 0;
+ *aEndOffset = 0;
+ *aText = nullptr;
+
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+ nsAutoString text;
+ int32_t startOffset = 0, endOffset = 0;
+
+ if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
+ startOffset = 0;
+ endOffset = textAcc->CharacterCount();
+ textAcc->TextSubstring(startOffset, endOffset, text);
+ } else {
+ AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
+ if (boundaryType == -1) return S_FALSE;
+ textAcc->TextAfterOffset(aOffset, boundaryType, &startOffset, &endOffset,
+ text);
+ }
+
+ *aStartOffset = startOffset;
+ *aEndOffset = endOffset;
+
+ if (text.IsEmpty()) return S_FALSE;
+
+ *aText = ::SysAllocStringLen(text.get(), text.Length());
+ return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_textAtOffset(long aOffset,
+ enum IA2TextBoundaryType aBoundaryType,
+ long* aStartOffset, long* aEndOffset,
+ BSTR* aText) {
+ if (!aStartOffset || !aEndOffset || !aText) return E_INVALIDARG;
+
+ *aStartOffset = *aEndOffset = 0;
+ *aText = nullptr;
+
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) return CO_E_OBJNOTCONNECTED;
+
+ if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+ nsAutoString text;
+ int32_t startOffset = 0, endOffset = 0;
+ if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
+ startOffset = 0;
+ endOffset = textAcc->CharacterCount();
+ textAcc->TextSubstring(startOffset, endOffset, text);
+ } else {
+ AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
+ if (boundaryType == -1) return S_FALSE;
+ textAcc->TextAtOffset(aOffset, boundaryType, &startOffset, &endOffset,
+ text);
+ }
+
+ *aStartOffset = startOffset;
+ *aEndOffset = endOffset;
+
+ if (text.IsEmpty()) return S_FALSE;
+
+ *aText = ::SysAllocStringLen(text.get(), text.Length());
+ return *aText ? S_OK : E_OUTOFMEMORY;
+}
+
+STDMETHODIMP
+ia2AccessibleText::removeSelection(long aSelectionIndex) {
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ return textAcc->RemoveFromSelection(aSelectionIndex) ? S_OK : E_INVALIDARG;
+}
+
+STDMETHODIMP
+ia2AccessibleText::setCaretOffset(long aOffset) {
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ if (!textAcc->IsValidOffset(aOffset)) return E_INVALIDARG;
+
+ textAcc->SetCaretOffset(aOffset);
+ return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::setSelection(long aSelectionIndex, long aStartOffset,
+ long aEndOffset) {
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ return textAcc->SetSelectionBoundsAt(aSelectionIndex, aStartOffset,
+ aEndOffset)
+ ? S_OK
+ : E_INVALIDARG;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_nCharacters(long* aNCharacters) {
+ if (!aNCharacters) return E_INVALIDARG;
+ *aNCharacters = 0;
+
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) return CO_E_OBJNOTCONNECTED;
+
+ *aNCharacters = textAcc->CharacterCount();
+ return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::scrollSubstringTo(long aStartIndex, long aEndIndex,
+ enum IA2ScrollType aScrollType) {
+ HyperTextAccessibleBase* textAcc = TextAcc();
+ if (!textAcc) {
+ return CO_E_OBJNOTCONNECTED;
+ }
+
+ if (!textAcc->IsValidRange(aStartIndex, aEndIndex)) return E_INVALIDARG;
+
+ textAcc->ScrollSubstringTo(aStartIndex, aEndIndex, aScrollType);
+ return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::scrollSubstringToPoint(long aStartIndex, long aEndIndex,
+ enum IA2CoordinateType aCoordType,
+ long aX, long aY) {
+ uint32_t geckoCoordType =
+ (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE)
+ ? nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE
+ : nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
+
+ auto [textAcc, hr] = LocalTextAcc();
+ if (!textAcc) {
+ return hr;
+ }
+
+ if (!textAcc->IsValidRange(aStartIndex, aEndIndex)) return E_INVALIDARG;
+
+ textAcc->ScrollSubstringToPoint(aStartIndex, aEndIndex, geckoCoordType, aX,
+ aY);
+ return S_OK;
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_newText(IA2TextSegment* aNewText) {
+ return GetModifiedText(true, aNewText);
+}
+
+STDMETHODIMP
+ia2AccessibleText::get_oldText(IA2TextSegment* aOldText) {
+ return GetModifiedText(false, aOldText);
+}
+
+// ia2AccessibleText
+
+HRESULT
+ia2AccessibleText::GetModifiedText(bool aGetInsertedText,
+ IA2TextSegment* aText) {
+ if (!aText) return E_INVALIDARG;
+
+ if (!sLastTextChangeAcc) return S_OK;
+
+ if (aGetInsertedText != sLastTextChangeWasInsert) return S_OK;
+
+ if (sLastTextChangeAcc != TextAcc()) return S_OK;
+
+ aText->start = sLastTextChangeStart;
+ aText->end = sLastTextChangeEnd;
+
+ if (sLastTextChangeString->IsEmpty()) return S_FALSE;
+
+ aText->text = ::SysAllocStringLen(sLastTextChangeString->get(),
+ sLastTextChangeString->Length());
+ return aText->text ? S_OK : E_OUTOFMEMORY;
+}
+
+AccessibleTextBoundary ia2AccessibleText::GetGeckoTextBoundary(
+ enum IA2TextBoundaryType aBoundaryType) {
+ switch (aBoundaryType) {
+ case IA2_TEXT_BOUNDARY_CHAR:
+ return nsIAccessibleText::BOUNDARY_CHAR;
+ case IA2_TEXT_BOUNDARY_WORD:
+ return nsIAccessibleText::BOUNDARY_WORD_START;
+ case IA2_TEXT_BOUNDARY_LINE:
+ return nsIAccessibleText::BOUNDARY_LINE_START;
+ case IA2_TEXT_BOUNDARY_PARAGRAPH:
+ return nsIAccessibleText::BOUNDARY_PARAGRAPH;
+ // case IA2_TEXT_BOUNDARY_SENTENCE:
+ // XXX: not implemented
+ default:
+ return -1;
+ }
+}
+
+void ia2AccessibleText::InitTextChangeData() {
+ ClearOnShutdown(&sLastTextChangeString);
+}
+
+void ia2AccessibleText::UpdateTextChangeData(HyperTextAccessibleBase* aAcc,
+ bool aInsert,
+ const nsAString& aStr,
+ int32_t aStart, uint32_t aLen) {
+ if (!sLastTextChangeString) sLastTextChangeString = new nsString();
+
+ sLastTextChangeAcc = aAcc;
+ sLastTextChangeStart = aStart;
+ sLastTextChangeEnd = aStart + aLen;
+ sLastTextChangeWasInsert = aInsert;
+ *sLastTextChangeString = aStr;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-27 20:22:55 +0000