private void smartPaste(IDocument document, DocumentCommand command) { int newOffset = command.offset; int newLength = command.length; String newText = command.text; try { JavaHeuristicScanner scanner = new JavaHeuristicScanner(document); JavaIndenter indenter = new JavaIndenter(document, scanner, fProject); int offset = newOffset; // reference position to get the indent from int refOffset = indenter.findReferencePosition(offset); if (refOffset == JavaHeuristicScanner.NOT_FOUND) return; int peerOffset = getPeerPosition(document, command); peerOffset = indenter.findReferencePosition(peerOffset); if (peerOffset != JavaHeuristicScanner.NOT_FOUND) refOffset = Math.min(refOffset, peerOffset); // eat any WS before the insertion to the beginning of the line int firstLine = 1; // don't format the first line per default, as it has other content before it IRegion line = document.getLineInformationOfOffset(offset); String notSelected = document.get(line.getOffset(), offset - line.getOffset()); if (notSelected.trim().length() == 0) { newLength += notSelected.length(); newOffset = line.getOffset(); firstLine = 0; } // prefix: the part we need for formatting but won't paste IRegion refLine = document.getLineInformationOfOffset(refOffset); String prefix = document.get(refLine.getOffset(), newOffset - refLine.getOffset()); // handle the indentation computation inside a temporary document Document temp = new Document(prefix + newText); DocumentRewriteSession session = temp.startRewriteSession(DocumentRewriteSessionType.STRICTLY_SEQUENTIAL); scanner = new JavaHeuristicScanner(temp); indenter = new JavaIndenter(temp, scanner, fProject); installJavaStuff(temp); // indent the first and second line // compute the relative indentation difference from the second line // (as the first might be partially selected) and use the value to // indent all other lines. boolean isIndentDetected = false; StringBuffer addition = new StringBuffer(); int insertLength = 0; int firstLineInsertLength = 0; int firstLineIndent = 0; int first = document.computeNumberOfLines(prefix) + firstLine; // don't format first line int lines = temp.getNumberOfLines(); int tabLength = getVisualTabLengthPreference(); boolean changed = false; for (int l = first; l < lines; l++) { // we don't change the number of lines while adding indents IRegion r = temp.getLineInformation(l); int lineOffset = r.getOffset(); int lineLength = r.getLength(); if (lineLength == 0) // don't modify empty lines continue; if (!isIndentDetected) { // indent the first pasted line String current = getCurrentIndent(temp, l); StringBuffer correct = indenter.computeIndentation(lineOffset); if (correct == null) return; // bail out insertLength = subtractIndent(correct, current, addition, tabLength); if (l == first) { firstLineInsertLength = insertLength; firstLineIndent = current.length(); } if (l != first && temp.get(lineOffset, lineLength).trim().length() != 0) { isIndentDetected = true; if (firstLineIndent >= current.length()) insertLength = firstLineInsertLength; if (insertLength == 0) { // no adjustment needed, bail out if (firstLine == 0) { // but we still need to adjust the first line command.offset = newOffset; command.length = newLength; if (changed) break; // still need to get the leading indent of the first line } return; } } else { changed = insertLength != 0; } } // relatively indent all pasted lines if (insertLength > 0) addIndent(temp, l, addition, tabLength); else if (insertLength < 0) cutIndent(temp, l, -insertLength, tabLength); } removeJavaStuff(temp); temp.stopRewriteSession(session); newText = temp.get(prefix.length(), temp.getLength() - prefix.length()); command.offset = newOffset; command.length = newLength; command.text = newText; } catch (BadLocationException e) { JavaPlugin.log(e); } }