524 lines
14 KiB
C++
524 lines
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:expandtab:shiftwidth=2:tabstop=2:
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*/
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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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#include "ia2AccessibleText.h"
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#include "Accessible2.h"
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#include "AccessibleText_i.c"
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#include "HyperTextAccessibleWrap.h"
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#include "HyperTextAccessible-inl.h"
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#include "ProxyWrappers.h"
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#include "mozilla/ClearOnShutdown.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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StaticRefPtr<HyperTextAccessibleWrap> ia2AccessibleText::sLastTextChangeAcc;
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StaticAutoPtr<nsString> ia2AccessibleText::sLastTextChangeString;
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uint32_t ia2AccessibleText::sLastTextChangeStart = 0;
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uint32_t ia2AccessibleText::sLastTextChangeEnd = 0;
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bool ia2AccessibleText::sLastTextChangeWasInsert = false;
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// IAccessibleText
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STDMETHODIMP
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ia2AccessibleText::addSelection(long aStartOffset, long aEndOffset)
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{
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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return textAcc->AddToSelection(aStartOffset, aEndOffset) ?
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S_OK : E_INVALIDARG;
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}
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STDMETHODIMP
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ia2AccessibleText::get_attributes(long aOffset, long *aStartOffset,
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long *aEndOffset, BSTR *aTextAttributes)
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{
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if (!aStartOffset || !aEndOffset || !aTextAttributes)
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return E_INVALIDARG;
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*aStartOffset = 0;
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*aEndOffset = 0;
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*aTextAttributes = nullptr;
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int32_t startOffset = 0, endOffset = 0;
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HRESULT hr;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct()) {
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return CO_E_OBJNOTCONNECTED;
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}
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nsCOMPtr<nsIPersistentProperties> attributes =
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textAcc->TextAttributes(true, aOffset, &startOffset, &endOffset);
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hr = AccessibleWrap::ConvertToIA2Attributes(attributes, aTextAttributes);
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if (FAILED(hr))
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return hr;
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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return S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::get_caretOffset(long *aOffset)
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{
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if (!aOffset)
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return E_INVALIDARG;
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*aOffset = -1;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct()) {
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return CO_E_OBJNOTCONNECTED;
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}
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*aOffset = textAcc->CaretOffset();
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return *aOffset != -1 ? S_OK : S_FALSE;
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}
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STDMETHODIMP
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ia2AccessibleText::get_characterExtents(long aOffset,
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enum IA2CoordinateType aCoordType,
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long* aX, long* aY,
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long* aWidth, long* aHeight)
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{
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if (!aX || !aY || !aWidth || !aHeight)
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return E_INVALIDARG;
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*aX = *aY = *aWidth = *aHeight = 0;
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uint32_t geckoCoordType = (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE) ?
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nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
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nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
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nsIntRect rect;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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rect = textAcc->CharBounds(aOffset, geckoCoordType);
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*aX = rect.x;
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*aY = rect.y;
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*aWidth = rect.width;
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*aHeight = rect.height;
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return S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::get_nSelections(long* aNSelections)
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{
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if (!aNSelections)
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return E_INVALIDARG;
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*aNSelections = 0;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct()) {
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return CO_E_OBJNOTCONNECTED;
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}
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*aNSelections = textAcc->SelectionCount();
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return S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::get_offsetAtPoint(long aX, long aY,
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enum IA2CoordinateType aCoordType,
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long* aOffset)
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{
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if (!aOffset)
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return E_INVALIDARG;
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*aOffset = 0;
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uint32_t geckoCoordType = (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE) ?
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nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
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nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct()) {
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return CO_E_OBJNOTCONNECTED;
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}
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*aOffset = textAcc->OffsetAtPoint(aX, aY, geckoCoordType);
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return *aOffset == -1 ? S_FALSE : S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::get_selection(long aSelectionIndex, long* aStartOffset,
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long* aEndOffset)
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{
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if (!aStartOffset || !aEndOffset)
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return E_INVALIDARG;
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*aStartOffset = *aEndOffset = 0;
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int32_t startOffset = 0, endOffset = 0;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct()) {
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return CO_E_OBJNOTCONNECTED;
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}
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if (!textAcc->SelectionBoundsAt(aSelectionIndex, &startOffset, &endOffset)) {
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return E_INVALIDARG;
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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return S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::get_text(long aStartOffset, long aEndOffset, BSTR* aText)
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{
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if (!aText)
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return E_INVALIDARG;
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*aText = nullptr;
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nsAutoString text;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct()) {
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return CO_E_OBJNOTCONNECTED;
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}
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if (!textAcc->IsValidRange(aStartOffset, aEndOffset)) {
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return E_INVALIDARG;
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}
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textAcc->TextSubstring(aStartOffset, aEndOffset, text);
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if (text.IsEmpty())
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return S_FALSE;
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*aText = ::SysAllocStringLen(text.get(), text.Length());
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return *aText ? S_OK : E_OUTOFMEMORY;
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}
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STDMETHODIMP
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ia2AccessibleText::get_textBeforeOffset(long aOffset,
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enum IA2TextBoundaryType aBoundaryType,
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long* aStartOffset, long* aEndOffset,
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BSTR* aText)
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{
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if (!aStartOffset || !aEndOffset || !aText)
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return E_INVALIDARG;
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*aStartOffset = *aEndOffset = 0;
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*aText = nullptr;
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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if (!textAcc->IsValidOffset(aOffset))
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return E_INVALIDARG;
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nsAutoString text;
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int32_t startOffset = 0, endOffset = 0;
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if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
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startOffset = 0;
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endOffset = textAcc->CharacterCount();
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textAcc->TextSubstring(startOffset, endOffset, text);
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} else {
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AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
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if (boundaryType == -1)
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return S_FALSE;
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textAcc->TextBeforeOffset(aOffset, boundaryType, &startOffset, &endOffset, text);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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if (text.IsEmpty())
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return S_FALSE;
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*aText = ::SysAllocStringLen(text.get(), text.Length());
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return *aText ? S_OK : E_OUTOFMEMORY;
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}
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STDMETHODIMP
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ia2AccessibleText::get_textAfterOffset(long aOffset,
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enum IA2TextBoundaryType aBoundaryType,
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long* aStartOffset, long* aEndOffset,
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BSTR* aText)
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{
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if (!aStartOffset || !aEndOffset || !aText)
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return E_INVALIDARG;
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*aStartOffset = 0;
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*aEndOffset = 0;
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*aText = nullptr;
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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if (!textAcc->IsValidOffset(aOffset))
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return E_INVALIDARG;
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nsAutoString text;
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int32_t startOffset = 0, endOffset = 0;
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if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
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startOffset = 0;
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endOffset = textAcc->CharacterCount();
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textAcc->TextSubstring(startOffset, endOffset, text);
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} else {
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AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
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if (boundaryType == -1)
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return S_FALSE;
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textAcc->TextAfterOffset(aOffset, boundaryType, &startOffset, &endOffset, text);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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if (text.IsEmpty())
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return S_FALSE;
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*aText = ::SysAllocStringLen(text.get(), text.Length());
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return *aText ? S_OK : E_OUTOFMEMORY;
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}
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STDMETHODIMP
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ia2AccessibleText::get_textAtOffset(long aOffset,
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enum IA2TextBoundaryType aBoundaryType,
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long* aStartOffset, long* aEndOffset,
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BSTR* aText)
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{
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if (!aStartOffset || !aEndOffset || !aText)
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return E_INVALIDARG;
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*aStartOffset = *aEndOffset = 0;
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*aText = nullptr;
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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if (!textAcc->IsValidOffset(aOffset))
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return E_INVALIDARG;
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nsAutoString text;
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int32_t startOffset = 0, endOffset = 0;
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if (aBoundaryType == IA2_TEXT_BOUNDARY_ALL) {
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startOffset = 0;
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endOffset = textAcc->CharacterCount();
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textAcc->TextSubstring(startOffset, endOffset, text);
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} else {
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AccessibleTextBoundary boundaryType = GetGeckoTextBoundary(aBoundaryType);
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if (boundaryType == -1)
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return S_FALSE;
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textAcc->TextAtOffset(aOffset, boundaryType, &startOffset, &endOffset, text);
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}
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*aStartOffset = startOffset;
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*aEndOffset = endOffset;
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if (text.IsEmpty())
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return S_FALSE;
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*aText = ::SysAllocStringLen(text.get(), text.Length());
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return *aText ? S_OK : E_OUTOFMEMORY;
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}
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STDMETHODIMP
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ia2AccessibleText::removeSelection(long aSelectionIndex)
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{
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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return textAcc->RemoveFromSelection(aSelectionIndex) ?
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S_OK : E_INVALIDARG;
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}
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STDMETHODIMP
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ia2AccessibleText::setCaretOffset(long aOffset)
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{
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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if (!textAcc->IsValidOffset(aOffset))
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return E_INVALIDARG;
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textAcc->SetCaretOffset(aOffset);
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return S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::setSelection(long aSelectionIndex, long aStartOffset,
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long aEndOffset)
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{
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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return textAcc->SetSelectionBoundsAt(aSelectionIndex, aStartOffset, aEndOffset) ?
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S_OK : E_INVALIDARG;
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}
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STDMETHODIMP
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ia2AccessibleText::get_nCharacters(long* aNCharacters)
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{
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if (!aNCharacters)
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return E_INVALIDARG;
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*aNCharacters = 0;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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*aNCharacters = textAcc->CharacterCount();
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return S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::scrollSubstringTo(long aStartIndex, long aEndIndex,
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enum IA2ScrollType aScrollType)
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{
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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if (!textAcc->IsValidRange(aStartIndex, aEndIndex))
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return E_INVALIDARG;
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textAcc->ScrollSubstringTo(aStartIndex, aEndIndex, aScrollType);
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return S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::scrollSubstringToPoint(long aStartIndex, long aEndIndex,
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enum IA2CoordinateType aCoordType,
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long aX, long aY)
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{
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uint32_t geckoCoordType = (aCoordType == IA2_COORDTYPE_SCREEN_RELATIVE) ?
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nsIAccessibleCoordinateType::COORDTYPE_SCREEN_RELATIVE :
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nsIAccessibleCoordinateType::COORDTYPE_PARENT_RELATIVE;
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MOZ_ASSERT(!HyperTextProxyFor(this));
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HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
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if (textAcc->IsDefunct())
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return CO_E_OBJNOTCONNECTED;
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if (!textAcc->IsValidRange(aStartIndex, aEndIndex))
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return E_INVALIDARG;
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textAcc->ScrollSubstringToPoint(aStartIndex, aEndIndex,
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geckoCoordType, aX, aY);
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return S_OK;
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}
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STDMETHODIMP
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ia2AccessibleText::get_newText(IA2TextSegment *aNewText)
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{
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return GetModifiedText(true, aNewText);
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}
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STDMETHODIMP
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ia2AccessibleText::get_oldText(IA2TextSegment *aOldText)
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{
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return GetModifiedText(false, aOldText);
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}
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// ia2AccessibleText
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HRESULT
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ia2AccessibleText::GetModifiedText(bool aGetInsertedText,
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IA2TextSegment *aText)
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{
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if (!aText)
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return E_INVALIDARG;
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if (!sLastTextChangeAcc)
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return S_OK;
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if (aGetInsertedText != sLastTextChangeWasInsert)
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return S_OK;
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if (sLastTextChangeAcc != this)
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return S_OK;
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aText->start = sLastTextChangeStart;
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aText->end = sLastTextChangeEnd;
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if (sLastTextChangeString->IsEmpty())
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return S_FALSE;
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aText->text = ::SysAllocStringLen(sLastTextChangeString->get(), sLastTextChangeString->Length());
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return aText->text ? S_OK : E_OUTOFMEMORY;
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}
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AccessibleTextBoundary
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ia2AccessibleText::GetGeckoTextBoundary(enum IA2TextBoundaryType aBoundaryType)
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{
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switch (aBoundaryType) {
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case IA2_TEXT_BOUNDARY_CHAR:
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return nsIAccessibleText::BOUNDARY_CHAR;
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case IA2_TEXT_BOUNDARY_WORD:
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return nsIAccessibleText::BOUNDARY_WORD_START;
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case IA2_TEXT_BOUNDARY_LINE:
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return nsIAccessibleText::BOUNDARY_LINE_START;
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//case IA2_TEXT_BOUNDARY_SENTENCE:
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//case IA2_TEXT_BOUNDARY_PARAGRAPH:
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// XXX: not implemented
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default:
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return -1;
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}
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}
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void
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ia2AccessibleText::InitTextChangeData()
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{
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ClearOnShutdown(&sLastTextChangeAcc);
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ClearOnShutdown(&sLastTextChangeString);
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}
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void
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ia2AccessibleText::UpdateTextChangeData(HyperTextAccessibleWrap* aAcc,
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bool aInsert, const nsString& aStr,
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int32_t aStart, uint32_t aLen)
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{
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if (!sLastTextChangeString)
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sLastTextChangeString = new nsString();
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sLastTextChangeAcc = aAcc;
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sLastTextChangeStart = aStart;
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sLastTextChangeEnd = aStart + aLen;
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sLastTextChangeWasInsert = aInsert;
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*sLastTextChangeString = aStr;
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}
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