// PSimpleIndenter has such a method but it's not exposed in the base class.
private boolean isBlockBegin(CharSequence lineToTheLeft) {
if (lineToTheLeft.length() == 0) {
return false;
}
char lastChar = lineToTheLeft.charAt(lineToTheLeft.length() - 1);
if (PBracketUtilities.isOpenBracket(lastChar) == false) {
return false;
}
char closeBracket = PBracketUtilities.getPartnerForBracket(lastChar);
if (textArea.getIndenter().isElectric(closeBracket) == false) {
return false;
}
return true;
}
private boolean insertMatchingBrackets() {
final int start = textArea.getSelectionStart();
final int end = textArea.getSelectionEnd();
int endLineIndex = textArea.getLineOfOffset(end);
int suffixPosition = textArea.getLineEndOffsetBeforeTerminator(endLineIndex);
String beforeInsertion = textArea.getTextBuffer().subSequence(0, start).toString();
String afterInsertion =
textArea
.getTextBuffer()
.subSequence(suffixPosition, textArea.getTextBuffer().length())
.toString();
String unmatchedOpenBrackets = getUnmatchedBrackets(beforeInsertion);
String unmatchedCloseBrackets = getUnmatchedBrackets(afterInsertion);
String reflectedCloseBrackets = PBracketUtilities.reflectBrackets(unmatchedCloseBrackets);
if (unmatchedOpenBrackets.startsWith(reflectedCloseBrackets) == false) {
return false;
}
String closingBrackets =
PBracketUtilities.reflectBrackets(
unmatchedOpenBrackets.substring(reflectedCloseBrackets.length()));
if (closingBrackets.length() == 0) {
return false;
}
String startLine = getLineTextAtOffset(start);
if (closingBrackets.endsWith("}") == false
|| textArea.getIndenter().isInNeedOfClosingSemicolon(startLine)) {
// TODO: "closingBrackets" is a bad name now it can have a semicolon on the end!
closingBrackets = closingBrackets + ";";
}
String candidateBlockContents =
textArea.getTextBuffer().subSequence(end, suffixPosition).toString();
String commonEnding = getCommonEnding(candidateBlockContents, closingBrackets);
String whitespace = getIndentationOfLineAtOffset(start);
// TODO: The newline inserter has no business thinking it knows how to increase the indent.
String prefix = "\n" + whitespace + textArea.getIndentationString();
String suffix = "\n" + whitespace + closingBrackets;
final int newCaretPosition = start + prefix.length();
textArea.replaceSelection(prefix);
// suffixPosition is invalidated by replaceSelection.
// But we can't swap the calls because replaceRange clears the selection.
int selectionSize = end - start;
suffixPosition -= selectionSize;
suffixPosition += prefix.length();
textArea.replaceRange(suffix, suffixPosition - commonEnding.length(), suffixPosition);
textArea.select(newCaretPosition, newCaretPosition);
return true;
}
private static String getUnmatchedBrackets(final String initialText) {
String text = initialText.replaceAll("\\\\.", "_"); // Remove escaped characters.
text = text.replaceAll("'.'", "_"); // Remove character literals.
text = text.replaceAll("\"([^\\n]*?)\"", "_"); // Remove string literals.
text = text.replaceAll("/\\*(?s).*?\\*/", "_"); // Remove C comments.
text = text.replaceAll("//[^\\n]*", "_"); // Remove C++ comments.
StringBuilder unmatchedBrackets = new StringBuilder();
for (int i = 0; i < text.length(); ++i) {
char ch = text.charAt(i);
if (PBracketUtilities.isOpenBracket(ch) && ch != '<') {
unmatchedBrackets.append(ch);
} else if (PBracketUtilities.isCloseBracket(ch) && ch != '>') {
char openBracket = PBracketUtilities.getPartnerForBracket(ch);
int lastCharIndex = unmatchedBrackets.length() - 1;
if (lastCharIndex >= 0 && unmatchedBrackets.charAt(lastCharIndex) == openBracket) {
unmatchedBrackets.deleteCharAt(lastCharIndex);
} else {
unmatchedBrackets.append(ch);
}
}
}
return unmatchedBrackets.toString();
}