-void ChatLineModelItem::computeWrapList() {
- enum Mode { SearchStart, SearchEnd };
-
- QList<ChatLineModel::Word> wplist; // use a temp list which we'll later copy into a QVector for efficiency
- QTextBoundaryFinder finder(QTextBoundaryFinder::Word, _contents.plainText);
- int idx;
- int oldidx = 0;
- bool wordStart = false; bool wordEnd = false;
- Mode mode = SearchEnd;
- ChatLineModel::Word word;
- word.start = 0;
- int wordstartx = 0;
-
- QTextLayout layout(_contents.plainText);
- QTextOption option;
- option.setWrapMode(QTextOption::NoWrap);
- layout.setTextOption(option);
-
- layout.setAdditionalFormats(QtUi::style()->toTextLayoutList(_contents.formatList, _contents.plainText.length()));
- layout.beginLayout();
- QTextLine line = layout.createLine();
- line.setNumColumns(_contents.plainText.length());
- layout.endLayout();
-
- do {
- idx = finder.toNextBoundary();
- if(idx < 0) idx = _contents.plainText.length();
- wordStart = finder.boundaryReasons().testFlag(QTextBoundaryFinder::StartWord);
- wordEnd = finder.boundaryReasons().testFlag(QTextBoundaryFinder::EndWord);
-
- //qDebug() << wordStart << wordEnd << _contents.plainText.left(idx) << _contents.plainText.mid(idx);
-
- if(mode == SearchEnd || (!wordStart && wordEnd)) {
- if(wordStart || !wordEnd) continue;
- oldidx = idx;
- mode = SearchStart;
- continue;
- }
- int wordendx = line.cursorToX(oldidx);
- int trailingendx = line.cursorToX(idx);
- word.width = wordendx - wordstartx;
- word.trailing = trailingendx - wordendx;
- wordstartx = trailingendx;
- wplist.append(word);
-
- if(wordStart) {
- word.start = idx;
- mode = SearchEnd;
+void ChatLineModelItem::computeWrapList() const
+{
+ QString text = _styledMsg.plainContents();
+ int length = text.length();
+ if (!length)
+ return;
+
+ QList<ChatLineModel::Word> wplist; // use a temp list which we'll later copy into a QVector for efficiency
+ QTextBoundaryFinder finder(QTextBoundaryFinder::Line,
+ _styledMsg.plainContents().unicode(),
+ length,
+ TextBoundaryFinderBuffer,
+ TextBoundaryFinderBufferSize);
+
+ int idx;
+ int oldidx = 0;
+ ChatLineModel::Word word;
+ word.start = 0;
+ qreal wordstartx = 0;
+
+ QTextLayout layout(_styledMsg.plainContents());
+ QTextOption option;
+ option.setWrapMode(QTextOption::NoWrap);
+ layout.setTextOption(option);
+
+ UiStyle::setTextLayoutFormats(layout, QtUi::style()->toTextLayoutList(_styledMsg.contentsFormatList(), length, messageLabel()));
+ layout.beginLayout();
+ QTextLine line = layout.createLine();
+ line.setNumColumns(length);
+ layout.endLayout();
+
+ while ((idx = finder.toNextBoundary()) >= 0 && idx <= length) {
+ // QTextBoundaryFinder has inconsistent behavior in Qt version up to and including 4.6.3 (at least).
+ // It doesn't point to the position we should break, but to the character before that.
+ // Unfortunately Qt decided to fix this by changing the behavior of QTBF, so now we have to add a version
+ // check. At the time of this writing, I'm still trying to get this reverted upstream...
+ //
+ // cf. https://bugs.webkit.org/show_bug.cgi?id=31076 and Qt commit e6ac173
+ static int needWorkaround = -1;
+ if (needWorkaround < 0) {
+ needWorkaround = 0;
+ QStringList versions = QString(qVersion()).split('.');
+ if (versions.count() == 3 && versions.at(0).toInt() == 4) {
+ if (versions.at(1).toInt() <= 6 && versions.at(2).toInt() <= 3)
+ needWorkaround = 1;
+ }
+ }
+ if (needWorkaround == 1) {
+ if (idx < length)
+ idx++;
+ }
+
+ if (idx == oldidx)
+ continue;
+
+ word.start = oldidx;
+ int wordend = idx;
+ for (; wordend > word.start; wordend--) {
+ if (!text.at(wordend - 1).isSpace())
+ break;
+ }
+
+ qreal wordendx = line.cursorToX(wordend);
+ qreal trailingendx = line.cursorToX(idx);
+ word.endX = wordendx;
+ word.width = wordendx - wordstartx;
+ word.trailing = trailingendx - wordendx;
+ wordstartx = trailingendx;
+ wplist.append(word);
+
+ oldidx = idx;