NS_IMETHODIMP
nsAccessiblePivot::MovePreviousByText(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 (mStartOffset == -1)
mStartOffset = text != oldPosition ? text->GetChildOffset(oldPosition) : 0;
if (mStartOffset == 0)
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->GetTextBeforeOffset(mStartOffset, startBoundary, &newStart, &newEnd,
unusedText);
if (newStart < mStartOffset)
mStartOffset = newEnd == mStartOffset ? newStart : newEnd;
else // XXX: In certain odd cases newStart is equal to mStartOffset
text->GetTextBeforeOffset(mStartOffset - 1, startBoundary, &newStart,
&mStartOffset, unusedText);
text->GetTextAtOffset(mStartOffset, endBoundary, &newStart, &mEndOffset,
unusedText);
*aResult = true;
NotifyOfPivotChange(mPosition, oldStart, oldEnd,
nsIAccessiblePivot::REASON_TEXT);
return NS_OK;
}
static gchar*
getTextBeforeOffsetCB(AtkText *aText, gint aOffset,
AtkTextBoundary aBoundaryType,
gint *aStartOffset, gint *aEndOffset)
{
AccessibleWrap* accWrap = GetAccessibleWrap(ATK_OBJECT(aText));
if (!accWrap)
return nullptr;
HyperTextAccessible* text = accWrap->AsHyperText();
if (!text || !text->IsTextRole())
return nullptr;
nsAutoString autoStr;
int32_t startOffset = 0, endOffset = 0;
nsresult rv =
text->GetTextBeforeOffset(aOffset, aBoundaryType,
&startOffset, &endOffset, autoStr);
*aStartOffset = startOffset;
*aEndOffset = endOffset;
NS_ENSURE_SUCCESS(rv, nullptr);
ConvertTexttoAsterisks(accWrap, autoStr);
NS_ConvertUTF16toUTF8 cautoStr(autoStr);
return (cautoStr.get()) ? g_strdup(cautoStr.get()) : nullptr;
}