void DocumentMarkerController::addMarker(Node* node, const DocumentMarker& newMarker)
{
ASSERT(newMarker.endOffset() >= newMarker.startOffset());
if (newMarker.endOffset() == newMarker.startOffset())
return;
m_possiblyExistingMarkerTypes.add(newMarker.type());
MarkerList* list = m_markers.get(node);
if (!list) {
list = new MarkerList;
list->append(RenderedDocumentMarker(newMarker));
m_markers.set(node, list);
} else {
RenderedDocumentMarker toInsert(newMarker);
size_t numMarkers = list->size();
size_t i;
// Iterate over all markers whose start offset is less than or equal to the new marker's.
// If one of them is of the same type as the new marker and touches it or intersects with it
// (there is at most one), remove it and adjust the new marker's start offset to encompass it.
for (i = 0; i < numMarkers; ++i) {
DocumentMarker marker = list->at(i);
if (marker.startOffset() > toInsert.startOffset())
break;
if (marker.type() == toInsert.type() && marker.endOffset() >= toInsert.startOffset()) {
toInsert.setStartOffset(marker.startOffset());
list->remove(i);
numMarkers--;
break;
}
}
size_t j = i;
// Iterate over all markers whose end offset is less than or equal to the new marker's,
// removing markers of the same type as the new marker which touch it or intersect with it,
// adjusting the new marker's end offset to cover them if necessary.
while (j < numMarkers) {
DocumentMarker marker = list->at(j);
if (marker.startOffset() > toInsert.endOffset())
break;
if (marker.type() == toInsert.type()) {
list->remove(j);
if (toInsert.endOffset() <= marker.endOffset()) {
toInsert.setEndOffset(marker.endOffset());
break;
}
numMarkers--;
} else
j++;
}
// At this point i points to the node before which we want to insert.
list->insert(i, RenderedDocumentMarker(toInsert));
}
// repaint the affected node
if (node->renderer())
node->renderer()->repaint();
}
void DocumentMarkerController::removeMarkers(Node* node, unsigned startOffset, int length, DocumentMarker::MarkerTypes markerTypes, RemovePartiallyOverlappingMarkerOrNot shouldRemovePartiallyOverlappingMarker)
{
if (length <= 0)
return;
if (!possiblyHasMarkers(markerTypes))
return;
ASSERT(!(m_markers.isEmpty()));
MarkerList* list = m_markers.get(node);
if (!list)
return;
bool docDirty = false;
unsigned endOffset = startOffset + length;
for (size_t i = 0; i < list->size();) {
DocumentMarker marker = list->at(i);
// markers are returned in order, so stop if we are now past the specified range
if (marker.startOffset() >= endOffset)
break;
// skip marker that is wrong type or before target
if (marker.endOffset() <= startOffset || !markerTypes.contains(marker.type())) {
i++;
continue;
}
// at this point we know that marker and target intersect in some way
docDirty = true;
// pitch the old marker
list->remove(i);
if (shouldRemovePartiallyOverlappingMarker)
// Stop here. Don't add resulting slices back.
continue;
// add either of the resulting slices that are left after removing target
if (startOffset > marker.startOffset()) {
DocumentMarker newLeft = marker;
newLeft.setEndOffset(startOffset);
list->insert(i, RenderedDocumentMarker(newLeft));
// i now points to the newly-inserted node, but we want to skip that one
i++;
}
if (marker.endOffset() > endOffset) {
DocumentMarker newRight = marker;
newRight.setStartOffset(endOffset);
list->insert(i, RenderedDocumentMarker(newRight));
// i now points to the newly-inserted node, but we want to skip that one
i++;
}
}
if (list->isEmpty()) {
m_markers.remove(node);
if (m_markers.isEmpty())
m_possiblyExistingMarkerTypes = 0;
}
// repaint the affected node
if (docDirty && node->renderer())
node->renderer()->repaint();
}