static gint
getCharacterCountCB(AtkText *aText)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return 0;
HyperTextAccessible* textAcc = accWrap->AsHyperText();
return textAcc->IsDefunct() ?
0 : static_cast<gint>(textAcc->CharacterCount());
}
NS_IMETHODIMP
xpcAccessibleHyperText::GetCharacterCount(int32_t* aCharacterCount)
{
NS_ENSURE_ARG_POINTER(aCharacterCount);
*aCharacterCount = 0;
HyperTextAccessible* text = static_cast<HyperTextAccessible*>(this);
if (text->IsDefunct())
return NS_ERROR_FAILURE;
*aCharacterCount = text->CharacterCount();
return NS_OK;
}
NS_IMETHODIMP
nsAccessiblePivot::MoveNextByText(TextBoundaryType aBoundary, bool* aResult)
{
NS_ENSURE_ARG(aResult);
*aResult = false;
int32_t oldStart = mStartOffset, oldEnd = mEndOffset;
HyperTextAccessible* text = mPosition->AsHyperText();
Accessible* oldPosition = mPosition;
while (!text) {
oldPosition = mPosition;
mPosition = mPosition->Parent();
text = mPosition->AsHyperText();
}
if (mEndOffset == -1)
mEndOffset = text != oldPosition ? text->GetChildOffset(oldPosition) : 0;
if (mEndOffset == text->CharacterCount())
return NS_OK;
AccessibleTextBoundary startBoundary, endBoundary;
switch (aBoundary) {
case CHAR_BOUNDARY:
startBoundary = nsIAccessibleText::BOUNDARY_CHAR;
endBoundary = nsIAccessibleText::BOUNDARY_CHAR;
break;
case WORD_BOUNDARY:
startBoundary = nsIAccessibleText::BOUNDARY_WORD_START;
endBoundary = nsIAccessibleText::BOUNDARY_WORD_END;
break;
default:
return NS_ERROR_INVALID_ARG;
}
nsAutoString unusedText;
int32_t newStart = 0, newEnd = 0;
text->GetTextAtOffset(mEndOffset, endBoundary, &newStart, &mEndOffset, unusedText);
text->GetTextBeforeOffset(mEndOffset, startBoundary, &newStart, &newEnd,
unusedText);
mStartOffset = newEnd == mEndOffset ? newStart : newEnd;
*aResult = true;
NotifyOfPivotChange(mPosition, oldStart, oldEnd,
nsIAccessiblePivot::REASON_TEXT);
return NS_OK;
}
static gint
getCharacterCountCB(AtkText *aText)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (accWrap) {
HyperTextAccessible* textAcc = accWrap->AsHyperText();
return
textAcc->IsDefunct() ? 0 : static_cast<gint>(textAcc->CharacterCount());
}
if (ProxyAccessible* proxy = GetProxy(ATK_OBJECT(aText))) {
return proxy->CharacterCount();
}
return 0;
}
NS_IMETHODIMP
nsAccessiblePivot::SetTextRange(nsIAccessibleText* aTextAccessible,
int32_t aStartOffset, int32_t aEndOffset,
bool aIsFromUserInput, uint8_t aArgc)
{
NS_ENSURE_ARG(aTextAccessible);
// Check that start offset is smaller than end offset, and that if a value is
// smaller than 0, both should be -1.
NS_ENSURE_TRUE(aStartOffset <= aEndOffset &&
(aStartOffset >= 0 || (aStartOffset != -1 && aEndOffset != -1)),
NS_ERROR_INVALID_ARG);
nsRefPtr<Accessible> acc(do_QueryObject(aTextAccessible));
if (!acc)
return NS_ERROR_INVALID_ARG;
HyperTextAccessible* newPosition = acc->AsHyperText();
if (!newPosition || !IsDescendantOf(newPosition, GetActiveRoot()))
return NS_ERROR_INVALID_ARG;
// Make sure the given offsets don't exceed the character count.
int32_t charCount = newPosition->CharacterCount();
if (aEndOffset > charCount)
return NS_ERROR_FAILURE;
int32_t oldStart = mStartOffset, oldEnd = mEndOffset;
mStartOffset = aStartOffset;
mEndOffset = aEndOffset;
nsRefPtr<Accessible> oldPosition = mPosition.forget();
mPosition = newPosition;
NotifyOfPivotChange(oldPosition, oldStart, oldEnd,
nsIAccessiblePivot::REASON_TEXT,
(aArgc > 0) ? aIsFromUserInput : true);
return NS_OK;
}
NS_IMETHODIMP
nsAccessiblePivot::SetTextRange(nsIAccessibleText* aTextAccessible,
int32_t aStartOffset, int32_t aEndOffset,
bool aIsFromUserInput, uint8_t aArgc)
{
NS_ENSURE_ARG(aTextAccessible);
// Check that start offset is smaller than end offset, and that if a value is
// smaller than 0, both should be -1.
NS_ENSURE_TRUE(aStartOffset <= aEndOffset &&
(aStartOffset >= 0 || (aStartOffset != -1 && aEndOffset != -1)),
NS_ERROR_INVALID_ARG);
nsCOMPtr<nsIAccessible> xpcAcc = do_QueryInterface(aTextAccessible);
NS_ENSURE_ARG(xpcAcc);
RefPtr<Accessible> acc = xpcAcc->ToInternalAccessible();
NS_ENSURE_ARG(acc);
HyperTextAccessible* position = acc->AsHyperText();
if (!position || !IsDescendantOf(position, GetActiveRoot()))
return NS_ERROR_INVALID_ARG;
// Make sure the given offsets don't exceed the character count.
if (aEndOffset > static_cast<int32_t>(position->CharacterCount()))
return NS_ERROR_FAILURE;
int32_t oldStart = mStartOffset, oldEnd = mEndOffset;
mStartOffset = aStartOffset;
mEndOffset = aEndOffset;
mPosition.swap(acc);
NotifyOfPivotChange(acc, oldStart, oldEnd,
nsIAccessiblePivot::REASON_TEXT,
(aArgc > 0) ? aIsFromUserInput : true);
return NS_OK;
}
NS_IMETHODIMP
nsAccessiblePivot::MovePreviousByText(TextBoundaryType aBoundary, bool* aResult)
{
NS_ENSURE_ARG(aResult);
*aResult = false;
int32_t tempStart = mStartOffset, tempEnd = mEndOffset;
Accessible* tempPosition = mPosition;
Accessible* root = GetActiveRoot();
while (true) {
Accessible* curPosition = tempPosition;
HyperTextAccessible* text;
// Find the nearest text node using a reverse preorder traversal starting
// from the current node.
if (!(text = tempPosition->AsHyperText())) {
text = SearchForText(tempPosition, true);
if (!text)
return NS_OK;
if (text != curPosition)
tempStart = tempEnd = -1;
tempPosition = text;
}
// If the search led to the parent of the node we started on (e.g. when
// starting on a text leaf), start the text movement from the end of that
// node, otherwise we just default to 0.
if (tempStart == -1) {
if (tempPosition != curPosition)
tempStart = text == curPosition->Parent() ?
text->GetChildOffset(curPosition) : text->CharacterCount();
else
tempStart = 0;
}
// If there's no more text on the current node, try to find the previous
// text node; if there isn't one, bail out.
if (tempStart == 0) {
if (tempPosition == root)
return NS_OK;
// If we're currently sitting on a link, try move to either the previous
// sibling or the parent, whichever is closer to the current end
// offset. Otherwise, do a forward search for the next node to land on
// (we don't do this in the first case because we don't want to go to the
// subtree).
Accessible* sibling = tempPosition->PrevSibling();
if (tempPosition->IsLink()) {
if (sibling && sibling->IsLink()) {
HyperTextAccessible* siblingText = sibling->AsHyperText();
tempStart = tempEnd = siblingText ?
siblingText->CharacterCount() : -1;
tempPosition = sibling;
} else {
tempStart = tempPosition->StartOffset();
tempEnd = tempPosition->EndOffset();
tempPosition = tempPosition->Parent();
}
} else {
HyperTextAccessible* tempText = SearchForText(tempPosition, true);
if (!tempText)
return NS_OK;
tempPosition = tempText;
tempStart = tempEnd = tempText->CharacterCount();
}
continue;
}
AccessibleTextBoundary startBoundary, endBoundary;
switch (aBoundary) {
case CHAR_BOUNDARY:
startBoundary = nsIAccessibleText::BOUNDARY_CHAR;
endBoundary = nsIAccessibleText::BOUNDARY_CHAR;
break;
case WORD_BOUNDARY:
startBoundary = nsIAccessibleText::BOUNDARY_WORD_START;
endBoundary = nsIAccessibleText::BOUNDARY_WORD_END;
break;
default:
return NS_ERROR_INVALID_ARG;
}
nsAutoString unusedText;
int32_t newStart = 0, newEnd = 0, currentStart = tempStart, potentialEnd = 0;
text->TextBeforeOffset(tempStart, startBoundary, &newStart, &newEnd, unusedText);
if (newStart < tempStart)
tempStart = newEnd >= currentStart ? newStart : newEnd;
else // XXX: In certain odd cases newStart is equal to tempStart
text->TextBeforeOffset(tempStart - 1, startBoundary, &newStart,
&tempStart, unusedText);
text->TextAtOffset(tempStart, endBoundary, &newStart, &potentialEnd,
unusedText);
tempEnd = potentialEnd < tempEnd ? potentialEnd : currentStart;
// The offset range we've obtained might have embedded characters in it,
// limit the range to the start of the last occurrence of an embedded
// character.
Accessible* childAtOffset = nullptr;
for (int32_t i = tempEnd - 1; i >= tempStart; i--) {
childAtOffset = text->GetChildAtOffset(i);
if (childAtOffset && nsAccUtils::IsEmbeddedObject(childAtOffset)) {
tempStart = childAtOffset->EndOffset();
break;
}
}
// If there's an embedded character at the very end of the range, we
// instead want to traverse into it. So restart the movement with
// the child as the starting point.
if (childAtOffset && nsAccUtils::IsEmbeddedObject(childAtOffset) &&
tempEnd == static_cast<int32_t>(childAtOffset->EndOffset())) {
tempPosition = childAtOffset;
tempStart = tempEnd = childAtOffset->AsHyperText()->CharacterCount();
continue;
}
*aResult = true;
Accessible* startPosition = mPosition;
int32_t oldStart = mStartOffset, oldEnd = mEndOffset;
mPosition = tempPosition;
mStartOffset = tempStart;
mEndOffset = tempEnd;
NotifyOfPivotChange(startPosition, oldStart, oldEnd,
nsIAccessiblePivot::REASON_TEXT);
return NS_OK;
}
}