void (@NotNull ArrangementEntryWrapper<E> newWrapper, @NotNull ArrangementEntryWrapper<E> oldWrapper, @Nullable ArrangementEntryWrapper<E> previous, @Nullable ArrangementEntryWrapper<E> next, @NotNull Context<E> context) { // Calculate blank lines before the arrangement. int blankLinesBefore = oldWrapper.getBlankLinesBefore(); ArrangementEntryWrapper<E> parentWrapper = oldWrapper.getParent(); int desiredBlankLinesNumber = getBlankLines(context, parentWrapper, newWrapper, previous, next); if ((desiredBlankLinesNumber < 0 || desiredBlankLinesNumber == blankLinesBefore) && newWrapper.equals(oldWrapper)) { return; } int lineFeedsDiff = desiredBlankLinesNumber - blankLinesBefore; int insertionOffset = oldWrapper.getStartOffset(); if (oldWrapper.getStartOffset() > newWrapper.getStartOffset()) { insertionOffset -= newWrapper.getEndOffset() - newWrapper.getStartOffset(); } if (newWrapper.getStartOffset() != oldWrapper.getStartOffset() || !newWrapper.equals(oldWrapper)) { context.addMoveInfo(newWrapper.getStartOffset(), newWrapper.getEndOffset(), oldWrapper.getStartOffset()); myDocument.moveText(newWrapper.getStartOffset(), newWrapper.getEndOffset(), oldWrapper.getStartOffset()); for (int i = myWrappers.size() - 1; i >= 0; i--) { ArrangementEntryWrapper<E> w = myWrappers.get(i); if (w == newWrapper) { continue; } if (w.getStartOffset() >= oldWrapper.getStartOffset() && w.getStartOffset() < newWrapper.getStartOffset()) { w.applyShift(newWrapper.getEndOffset() - newWrapper.getStartOffset()); } else if (oldWrapper != w && w.getStartOffset() <= oldWrapper.getStartOffset() && w.getStartOffset() > newWrapper.getStartOffset()) { w.applyShift(newWrapper.getStartOffset() - newWrapper.getEndOffset()); } } } if (desiredBlankLinesNumber >= 0 && lineFeedsDiff > 0) { myDocument.insertString(insertionOffset, StringUtil.repeat("\n", lineFeedsDiff)); shiftOffsets(lineFeedsDiff, insertionOffset); } if (desiredBlankLinesNumber >= 0 && lineFeedsDiff < 0) { // Cut exceeding blank lines. int replacementStartOffset = getBlankLineOffset(-lineFeedsDiff, insertionOffset); myDocument.deleteString(replacementStartOffset, insertionOffset); shiftOffsets(replacementStartOffset - insertionOffset, insertionOffset); } if (desiredBlankLinesNumber < 0) { return; } updateAllWrapperRanges(parentWrapper, lineFeedsDiff); }