SurroundingText::SurroundingText(const VisiblePosition& visiblePosition, unsigned maxLength)
: m_positionOffsetInContent(0)
{
if (visiblePosition.isNull())
return;
const unsigned halfMaxLength = maxLength / 2;
CharacterIterator forwardIterator(makeRange(visiblePosition, endOfDocument(visiblePosition)).get(), TextIteratorStopsOnFormControls);
if (!forwardIterator.atEnd())
forwardIterator.advance(maxLength - halfMaxLength);
Position position = visiblePosition.deepEquivalent().parentAnchoredEquivalent();
Document* document = position.document();
ASSERT(document);
RefPtr<Range> forwardRange = forwardIterator.range();
if (!forwardRange || !Range::create(*document, position, forwardRange->startPosition())->text().length()) {
ASSERT(forwardRange);
return;
}
BackwardsCharacterIterator backwardsIterator(makeRange(startOfDocument(visiblePosition), visiblePosition).get(), TextIteratorStopsOnFormControls);
if (!backwardsIterator.atEnd())
backwardsIterator.advance(halfMaxLength);
RefPtr<Range> backwardsRange = backwardsIterator.range();
if (!backwardsRange) {
ASSERT(backwardsRange);
return;
}
m_positionOffsetInContent = Range::create(*document, backwardsRange->endPosition(), position)->text().length();
m_contentRange = Range::create(*document, backwardsRange->endPosition(), forwardRange->startPosition());
ASSERT(m_contentRange);
}
void SurroundingText::initialize(const Position& startPosition, const Position& endPosition, unsigned maxLength)
{
ASSERT(startPosition.document() == endPosition.document());
const unsigned halfMaxLength = maxLength / 2;
Document* document = startPosition.document();
// The position will have no document if it is null (as in no position).
if (!document || !document->documentElement())
return;
// The forward range starts at the selection end and ends at the document's
// end. It will then be updated to only contain the text in the text in the
// right range around the selection.
CharacterIterator forwardIterator(endPosition, lastPositionInNode(document->documentElement()).parentAnchoredEquivalent(), TextIteratorStopsOnFormControls);
// FIXME: why do we stop going trough the text if we were not able to select something on the right?
if (!forwardIterator.atEnd())
forwardIterator.advance(maxLength - halfMaxLength);
EphemeralRange forwardRange = forwardIterator.range();
if (forwardRange.isNull() || !Range::create(*document, endPosition, forwardRange.startPosition())->text().length())
return;
// Same as with the forward range but with the backward range. The range
// starts at the document's start and ends at the selection start and will
// be updated.
BackwardsCharacterIterator backwardsIterator(firstPositionInNode(document->documentElement()).parentAnchoredEquivalent(), startPosition, TextIteratorStopsOnFormControls);
if (!backwardsIterator.atEnd())
backwardsIterator.advance(halfMaxLength);
m_startOffsetInContent = Range::create(*document, backwardsIterator.endPosition(), startPosition)->text().length();
m_endOffsetInContent = Range::create(*document, backwardsIterator.endPosition(), endPosition)->text().length();
m_contentRange = Range::create(*document, backwardsIterator.endPosition(), forwardRange.startPosition());
ASSERT(m_contentRange);
}
// Currenntly ignoring TextCheckingResult::details but should be handled. See Bug 56368.
void SpellChecker::didCheck(int sequence, const Vector<TextCheckingResult>& results)
{
if (!isValid(sequence))
return;
if (!m_requestNode->renderer()) {
clearRequest();
return;
}
int startOffset = 0;
PositionIterator start = firstPositionInOrBeforeNode(m_requestNode.get());
for (size_t i = 0; i < results.size(); ++i) {
if (results[i].type != TextCheckingTypeSpelling && results[i].type != TextCheckingTypeGrammar)
continue;
// To avoid moving the position backward, we assume the given results are sorted with
// startOffset as the ones returned by [NSSpellChecker requestCheckingOfString:].
ASSERT(startOffset <= results[i].location);
if (!forwardIterator(start, results[i].location - startOffset))
break;
PositionIterator end = start;
if (!forwardIterator(end, results[i].length))
break;
// Users or JavaScript applications may change text while a spell-checker checks its
// spellings in the background. To avoid adding markers to the words modified by users or
// JavaScript applications, retrieve the words in the specified region and compare them with
// the original ones.
RefPtr<Range> range = Range::create(m_requestNode->document(), start, end);
// FIXME: Use textContent() compatible string conversion.
String destination = range->text();
String source = m_requestText.substring(results[i].location, results[i].length);
if (destination == source)
m_requestNode->document()->markers()->addMarker(range.get(), toMarkerType(results[i].type));
startOffset = results[i].location;
}
clearRequest();
}
SurroundingText::SurroundingText(const Position& position, unsigned maxLength)
: m_positionOffsetInContent(0)
{
const unsigned halfMaxLength = maxLength / 2;
Document* document = position.document();
// The |position| will have no document if it is null (as in no position).
if (!document)
return;
// The forward range starts at the selection end and ends at the document's
// end. It will then be updated to only contain the text in the text in the
// right range around the selection.
RefPtrWillBeRawPtr<Range> forwardRange = Range::create(*document, position, lastPositionInNode(document->documentElement()).parentAnchoredEquivalent());
CharacterIterator forwardIterator(forwardRange.get(), TextIteratorStopsOnFormControls);
if (!forwardIterator.atEnd())
forwardIterator.advance(maxLength - halfMaxLength);
forwardRange = forwardIterator.range();
if (!forwardRange || !Range::create(*document, position, forwardRange->startPosition())->text().length()) {
ASSERT(forwardRange);
return;
}
// Same as with the forward range but with the backward range. The range
// starts at the document's start and ends at the selection start and will
// be updated.
RefPtrWillBeRawPtr<Range> backwardsRange = Range::create(*document, firstPositionInNode(document->documentElement()).parentAnchoredEquivalent(), position);
BackwardsCharacterIterator backwardsIterator(backwardsRange.get(), TextIteratorStopsOnFormControls);
if (!backwardsIterator.atEnd())
backwardsIterator.advance(halfMaxLength);
backwardsRange = backwardsIterator.range();
if (!backwardsRange) {
ASSERT(backwardsRange);
return;
}
m_positionOffsetInContent = Range::create(*document, backwardsRange->endPosition(), position)->text().length();
m_contentRange = Range::create(*document, backwardsRange->endPosition(), forwardRange->startPosition());
ASSERT(m_contentRange);
}
