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9bfb7f9000
Soon we will need to be able to update the text change event data from both HandleAccEvent() and ProxyTextChangeEvent(), so separate out the logic to do that into a function.
640 lines
17 KiB
C++
640 lines
17 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::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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A11Y_TRYBLOCK_BEGIN
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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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return proxy->AddToSelection(aStartOffset, aEndOffset) ?
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S_OK : E_INVALIDARG;
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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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nsAutoTArray<Attribute, 10> attrs;
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proxy->TextAttributes(true, aOffset, &attrs, &startOffset, &endOffset);
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hr = AccessibleWrap::ConvertToIA2Attributes(&attrs, aTextAttributes);
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} else {
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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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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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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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if (!aOffset)
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return E_INVALIDARG;
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*aOffset = -1;
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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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*aOffset = proxy->CaretOffset();
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} else {
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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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*aOffset = textAcc->CaretOffset();
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}
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return *aOffset != -1 ? S_OK : S_FALSE;
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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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rect = proxy->CharBounds(aOffset, geckoCoordType);
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} else {
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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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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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if (!aNSelections)
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return E_INVALIDARG;
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*aNSelections = 0;
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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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*aNSelections = proxy->SelectionCount();
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} else {
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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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*aNSelections = textAcc->SelectionCount();
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}
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return S_OK;
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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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*aOffset = proxy->OffsetAtPoint(aX, aY, geckoCoordType);
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} else {
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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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*aOffset = textAcc->OffsetAtPoint(aX, aY, geckoCoordType);
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}
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return *aOffset == -1 ? S_FALSE : S_OK;
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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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nsString unused;
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if (!proxy->SelectionBoundsAt(aSelectionIndex, unused, &startOffset,
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&endOffset))
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return E_INVALIDARG;
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} else {
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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->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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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if (!proxy->TextSubstring(aStartOffset, aEndOffset, text)) {
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return E_INVALIDARG;
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}
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} else {
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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(aStartOffset, aEndOffset))
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return E_INVALIDARG;
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textAcc->TextSubstring(aStartOffset, aEndOffset, text);
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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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return proxy->RemoveFromSelection(aSelectionIndex) ? S_OK : E_INVALIDARG;
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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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return proxy->SetCaretOffset(aOffset) ? S_OK : E_INVALIDARG;
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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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return proxy->SetSelectionBoundsAt(aSelectionIndex, aStartOffset,
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aEndOffset) ? S_OK : E_INVALIDARG;
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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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if (!aNCharacters)
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return E_INVALIDARG;
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*aNCharacters = 0;
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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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*aNCharacters = proxy->CharacterCount();
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return S_OK;
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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
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proxy->ScrollSubstringTo(aStartIndex, aEndIndex, aScrollType);
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return S_OK;
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}
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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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A11Y_TRYBLOCK_END
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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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A11Y_TRYBLOCK_BEGIN
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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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if (ProxyAccessible* proxy = HyperTextProxyFor(this)) {
|
|
proxy->ScrollSubstringToPoint(aStartIndex, aEndIndex, geckoCoordType, aX,
|
|
aY);
|
|
return S_OK;
|
|
}
|
|
|
|
HyperTextAccessible* textAcc = static_cast<HyperTextAccessibleWrap*>(this);
|
|
if (textAcc->IsDefunct())
|
|
return CO_E_OBJNOTCONNECTED;
|
|
|
|
if (!textAcc->IsValidRange(aStartIndex, aEndIndex))
|
|
return E_INVALIDARG;
|
|
|
|
textAcc->ScrollSubstringToPoint(aStartIndex, aEndIndex,
|
|
geckoCoordType, aX, aY);
|
|
return S_OK;
|
|
|
|
A11Y_TRYBLOCK_END
|
|
}
|
|
|
|
STDMETHODIMP
|
|
ia2AccessibleText::get_newText(IA2TextSegment *aNewText)
|
|
{
|
|
A11Y_TRYBLOCK_BEGIN
|
|
|
|
return GetModifiedText(true, aNewText);
|
|
|
|
A11Y_TRYBLOCK_END
|
|
}
|
|
|
|
STDMETHODIMP
|
|
ia2AccessibleText::get_oldText(IA2TextSegment *aOldText)
|
|
{
|
|
A11Y_TRYBLOCK_BEGIN
|
|
|
|
return GetModifiedText(false, aOldText);
|
|
|
|
A11Y_TRYBLOCK_END
|
|
}
|
|
|
|
// 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 != this)
|
|
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_SENTENCE:
|
|
//case IA2_TEXT_BOUNDARY_PARAGRAPH:
|
|
// XXX: not implemented
|
|
default:
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
void
|
|
ia2AccessibleText::InitTextChangeData()
|
|
{
|
|
ClearOnShutdown(&sLastTextChangeAcc);
|
|
ClearOnShutdown(&sLastTextChangeString);
|
|
}
|
|
|
|
void
|
|
ia2AccessibleText::UpdateTextChangeData(HyperTextAccessibleWrap* aAcc,
|
|
bool aInsert, const nsString& aStr,
|
|
int32_t aStart, uint32_t aLen)
|
|
{
|
|
if (!sLastTextChangeString)
|
|
sLastTextChangeString = new nsString();
|
|
|
|
sLastTextChangeAcc = aAcc;
|
|
sLastTextChangeStart = aStart;
|
|
sLastTextChangeEnd = aStart + aLen;
|
|
sLastTextChangeWasInsert = aInsert;
|
|
*sLastTextChangeString = aStr;
|
|
}
|