-ContentsChatItem::WrapColumnFinder::WrapColumnFinder(const ChatItem *_item)
- : item(_item),
- wrapList(item->data(ChatLineModel::WrapListRole).value<ChatLineModel::WrapList>()),
- wordidx(0),
- lineCount(0),
- choppedTrailing(0)
-{
-}
-
-ContentsChatItem::WrapColumnFinder::~WrapColumnFinder() {
-}
-
-qint16 ContentsChatItem::WrapColumnFinder::nextWrapColumn() {
- if(wordidx >= wrapList.count())
- return -1;
-
- lineCount++;
- qreal targetWidth = lineCount * item->width() + choppedTrailing;
-
- qint16 start = wordidx;
- qint16 end = wrapList.count() - 1;
-
- // check if the whole line fits
- if(wrapList.at(end).endX <= targetWidth) // || start == end)
- return -1;
-
- // check if we have a very long word that needs inter word wrap
- if(wrapList.at(start).endX > targetWidth) {
- if(!line.isValid()) {
- item->initLayoutHelper(&layout, QTextOption::NoWrap);
- layout.beginLayout();
- line = layout.createLine();
- layout.endLayout();
- }
- return line.xToCursor(targetWidth, QTextLine::CursorOnCharacter);
- }
-
- while(true) {
- if(start + 1 == end) {
- wordidx = end;
- const ChatLineModel::Word &lastWord = wrapList.at(start); // the last word we were able to squeeze in
-
- // both cases should be cought preliminary
- Q_ASSERT(lastWord.endX <= targetWidth); // ensure that "start" really fits in
- Q_ASSERT(end < wrapList.count()); // ensure that start isn't the last word
-
- choppedTrailing += lastWord.trailing - (targetWidth - lastWord.endX);
- return wrapList.at(wordidx).start;
- }
-
- qint16 pivot = (end + start) / 2;
- if(wrapList.at(pivot).endX > targetWidth) {
- end = pivot;
- } else {
- start = pivot;
- }
- }
- Q_ASSERT(false);
- return -1;
-}
-
-/*************************************************************************************************/
-