/**
* Convert word like {@code *} or {@code ID} or {@code expr} to a path element. {@code anywhere}
* is {@code true} if {@code //} precedes the word.
*/
protected XPathElement getXPathElement(Token wordToken, boolean anywhere) {
if (wordToken.getType() == Token.EOF) {
throw new IllegalArgumentException("Missing path element at end of path");
}
String word = wordToken.getText();
int ttype = parser.getTokenType(word);
int ruleIndex = parser.getRuleIndex(word);
switch (wordToken.getType()) {
case XPathLexer.WILDCARD:
return anywhere ? new XPathWildcardAnywhereElement() : new XPathWildcardElement();
case XPathLexer.TOKEN_REF:
case XPathLexer.STRING:
if (ttype == Token.INVALID_TYPE) {
throw new IllegalArgumentException(
word + " at index " + wordToken.getStartIndex() + " isn't a valid token name");
}
return anywhere
? new XPathTokenAnywhereElement(word, ttype)
: new XPathTokenElement(word, ttype);
default:
if (ruleIndex == -1) {
throw new IllegalArgumentException(
word + " at index " + wordToken.getStartIndex() + " isn't a valid rule name");
}
return anywhere
? new XPathRuleAnywhereElement(word, ruleIndex)
: new XPathRuleElement(word, ruleIndex);
}
}
public static Interval getSourceInterval(@NonNull ParseTree context) {
Parameters.notNull("context", context);
if (context instanceof TerminalNode) {
TerminalNode terminalNode = (TerminalNode) context;
Token token = terminalNode.getSymbol();
return new Interval(token.getStartIndex(), token.getStopIndex());
} else if (context instanceof RuleNode) {
RuleNode ruleNode = (RuleNode) context;
RuleContext ruleContext = ruleNode.getRuleContext();
if (ruleContext instanceof ParserRuleContext) {
return getSourceInterval((ParserRuleContext) ruleContext);
} else {
Token startSymbol = getStartSymbol(context);
Token stopSymbol = getStopSymbol(context);
if (startSymbol == null || stopSymbol == null) {
return Interval.INVALID;
}
return new Interval(startSymbol.getStartIndex(), stopSymbol.getStopIndex());
}
} else {
return Interval.INVALID;
}
}
public static void displayErrorOrWarning(
File compilationUnit,
String errorOrWarning,
CommonTokenStream tokens,
Token offendingTokenStart,
Token offendingTokenEnd,
String msg) {
System.err.println(
errorOrWarning
+ compilationUnit.getAbsolutePath()
+ ", line "
+ offendingTokenStart.getLine()
+ ":"
+ offendingTokenStart.getCharPositionInLine()
+ " "
+ msg);
String input = tokens.getTokenSource().getInputStream().toString();
String[] lines = input.split("\n");
String errorLine = lines[offendingTokenStart.getLine() - 1];
System.err.println(errorLine);
for (int i = 0; i < offendingTokenStart.getCharPositionInLine(); i++)
if (errorLine.substring(i, i + 1).equals("\t")) System.err.print("\t");
else System.err.print(" ");
int start = offendingTokenStart.getStartIndex();
int stop = offendingTokenEnd.getStopIndex();
if (start >= 0 && stop >= 0) for (int i = start; i <= stop; i++) System.err.print("^");
System.err.println();
}
@Override
public void createPresentation(TextPresentation presentation, ITypedRegion region) {
// Use tokens provided by the lexer to highlight keywords, etc...
// Seems fast enough to skip Eclipse partitioning. Infact, the Eclipse
// partitioner seems to slow everything down...
TSLKGrammarLexer lexer = new TSLKGrammarLexer(new ANTLRInputStream(document.get()));
Token t = null;
while ((t = lexer.nextToken()).getType() != Token.EOF) {
if (t.getStartIndex() > region.getOffset() + region.getLength()) break;
int start = t.getStartIndex();
int end = t.getStopIndex();
RGB foreground = null;
RGB background = null;
int style = SWT.NORMAL;
switch (t.getType()) { // TODO: Make keywords customisable
case TSLKGrammarLexer.WHILE:
case TSLKGrammarLexer.FOR:
case TSLKGrammarLexer.FUNC:
case TSLKGrammarLexer.IF:
case TSLKGrammarLexer.THEN:
case TSLKGrammarLexer.DO:
case TSLKGrammarLexer.END:
foreground = ColorManager.KEYWORD;
style = SWT.BOLD;
break;
case TSLKGrammarLexer.STRING:
foreground = ColorManager.STRING;
break;
case TSLKGrammarLexer.SLCOMMENT:
foreground = ColorManager.SINGLE_LINE_COMMENT;
break;
case TSLKGrammarLexer.MLCOMMENT:
foreground = ColorManager.MULTI_LINE_COMMENT;
break;
default:
foreground = ColorManager.DEFAULT;
break;
}
presentation.addStyleRange(
new StyleRange(
start,
end - start + 1,
colorManager.getColor(foreground),
colorManager.getColor(background),
style));
}
}
@CheckForNull
public static TerminalNode findTerminalNode(@NonNull ParseTree node, Token symbol) {
if (symbol == null) {
return null;
}
if (node instanceof TerminalNode) {
TerminalNode terminalNode = (TerminalNode) node;
if (Utils.equals(terminalNode.getSymbol(), symbol)) {
return terminalNode;
}
return null;
}
for (int i = 0; i < node.getChildCount(); i++) {
ParseTree child = node.getChild(i);
TerminalNode stopNode = ParseTrees.getStopNode(child);
if (stopNode == null) {
continue;
}
Token stopSymbol = stopNode.getSymbol();
if (stopSymbol.getStopIndex() < symbol.getStartIndex()) {
continue;
}
TerminalNode startNode = ParseTrees.getStartNode(child);
assert startNode != null;
stopSymbol = startNode.getSymbol();
if (stopSymbol == null || stopSymbol.getStartIndex() > symbol.getStopIndex()) {
break;
}
if (stopSymbol.equals(symbol)) {
return startNode;
}
TerminalNode terminalNode = findTerminalNode(child, symbol);
if (terminalNode != null) {
return terminalNode;
}
}
return null;
}
protected boolean isMultiLineToken(TokenSourceWithStateV4<TState> lexer, Token token) {
/*if (lexer != null && lexer.getLine() > token.getLine()) {
return true;
}*/
int startLine = snapshot.findLineNumber(token.getStartIndex());
int stopLine = snapshot.findLineNumber(token.getStopIndex() + 1);
return startLine != stopLine;
}
private void addElement(Token token, SyntaxElementType type) {
syntaxElements.add(
SyntaxElement.create(
token.getText(),
token.getStartIndex(),
token.getStopIndex(),
token.getTokenIndex(),
type));
if (debug) {
SyntaxElement e = syntaxElements.get(syntaxElements.size() - 1);
System.out.println(String.format("%d-%d %s %s", e.from, e.to, e.type.name(), e.value));
}
}
protected Collection<TaggedPositionRegion<TokenTag<Token>>> getTagsForToken(Token token) {
TokenTag<Token> tag = highlightToken(token);
if (tag != null) {
return Collections.<TaggedPositionRegion<TokenTag<Token>>>singleton(
new BaseTaggedPositionRegion<>(
new SnapshotPositionRegion(
snapshot,
OffsetRegion.fromBounds(token.getStartIndex(), token.getStopIndex() + 1)),
tag));
}
return Collections.emptyList();
}
/**
* Gets whether or not {@code token} is the first non-whitespace symbol on a line.
*
* @param token The token to test.
* @return {@code true} if the only characters appearing before {@code token} on the same line are
* whitespace characters according to {@link Character#isWhitespace}.
*/
public static boolean elementStartsLine(Token token) {
String beginningOfLineText =
token
.getTokenSource()
.getInputStream()
.getText(
new Interval(
token.getStartIndex() - token.getCharPositionInLine(),
token.getStartIndex() - 1));
for (int i = 0; i < beginningOfLineText.length(); i++) {
if (!Character.isWhitespace(beginningOfLineText.charAt(i))) {
return false;
}
}
return true;
}
protected boolean tokenSkippedLines(int endLinePrevious, Token token) {
int startLineCurrent = snapshot.findLineNumber(token.getStartIndex());
return startLineCurrent > endLinePrevious + 1;
}
public List<TaggedPositionRegion<TokenTag<Token>>> getHighlights(int startOffset, int endOffset) {
List<TaggedPositionRegion<TokenTag<Token>>> tags = new ArrayList<>();
boolean updateOffsets = true;
if (endOffset == Integer.MAX_VALUE) {
endOffset = snapshot.length();
}
OffsetRegion span = OffsetRegion.fromBounds(startOffset, endOffset);
if (failedTimeout) {
return tags;
}
boolean spanExtended = false;
int extendMultiLineSpanToLine = 0;
OffsetRegion extendedSpan = span;
synchronized (lock) {
OffsetRegion requestedSpan = span;
ParseRequest<TState> request = adjustParseSpan(span);
TState startState = request.getState();
span = request.getRegion();
CharStream input;
try {
input = createInputStream(span);
} catch (BadLocationException ex) {
LOGGER.log(Level.WARNING, ex.getMessage(), ex);
return tags;
}
TokenSourceWithStateV4<TState> lexer = createLexer(input, startState);
lexer.setTokenFactory(new DocumentSnapshotTokenFactory(getEffectiveTokenSource(lexer)));
Token previousToken = null;
boolean previousTokenEndsLine = false;
/* this is held outside the loop because only tokens which end at the end of a line
* impact its value.
*/
boolean lineStateChanged = false;
while (true) {
// TODO: perform this under a read lock
Token token = lexer.nextToken();
// The latter is true for EOF token with span.getEnd() at the end of the document
boolean inBounds =
token.getStartIndex() < span.getEnd() || token.getStopIndex() < span.getEnd();
if (updateOffsets) {
int startLineCurrent;
if (token.getType() == Token.EOF) startLineCurrent = snapshot.getLineCount();
else startLineCurrent = snapshot.findLineNumber(token.getStartIndex());
// endLinePrevious is the line number the previous token ended on
int endLinePrevious;
if (previousToken != null)
endLinePrevious = snapshot.findLineNumber(previousToken.getStopIndex() + 1);
else endLinePrevious = snapshot.findLineNumber(span.getStart()) - 1;
if (startLineCurrent > endLinePrevious + 1
|| (startLineCurrent == endLinePrevious + 1 && !previousTokenEndsLine)) {
int firstMultilineLine = endLinePrevious;
if (previousToken == null || previousTokenEndsLine) firstMultilineLine++;
for (int i = firstMultilineLine; i < startLineCurrent; i++) {
if (!lineStates.get(i).getIsMultiLineToken() || lineStateChanged)
extendMultiLineSpanToLine = i + 1;
if (inBounds) setLineState(i, lineStates.get(i).createMultiLineState());
}
}
}
if (token.getType() == Token.EOF) break;
if (updateOffsets && isMultiLineToken(lexer, token)) {
int startLine = snapshot.findLineNumber(token.getStartIndex());
int stopLine = snapshot.findLineNumber(token.getStopIndex() + 1);
for (int i = startLine; i < stopLine; i++) {
if (!lineStates.get(i).getIsMultiLineToken()) extendMultiLineSpanToLine = i + 1;
if (inBounds) setLineState(i, lineStates.get(i).createMultiLineState());
}
}
boolean tokenEndsLine = tokenEndsAtEndOfLine(lexer, token);
if (updateOffsets && tokenEndsLine) {
TState stateAtEndOfLine = lexer.getCurrentState();
int line = snapshot.findLineNumber(token.getStopIndex() + 1);
lineStateChanged =
lineStates.get(line).getIsMultiLineToken()
|| !lineStates.get(line).equals(stateAtEndOfLine);
// even if the state didn't change, we call SetLineState to make sure the
// _first/_lastChangedLine values get updated.
// have to check bounds for this one or the editor might not get an update (if the token
// ends a line)
if (updateOffsets && inBounds) setLineState(line, stateAtEndOfLine);
if (lineStateChanged) {
if (line < snapshot.getLineCount() - 1) {
/* update the span's end position or the line state change won't be reflected
* in the editor
*/
int endPosition =
line < snapshot.getLineCount() - 2
? snapshot.findLineFromLineNumber(line + 2).getStart().getOffset()
: snapshot.length();
if (endPosition > extendedSpan.getEnd()) {
spanExtended = true;
extendedSpan = OffsetRegion.fromBounds(extendedSpan.getStart(), endPosition);
}
}
}
}
if (token.getStartIndex() >= span.getEnd()) {
break;
}
previousToken = token;
previousTokenEndsLine = tokenEndsLine;
if (token.getStopIndex() < requestedSpan.getStart()) {
continue;
}
Collection<TaggedPositionRegion<TokenTag<Token>>> tokenClassificationSpans =
getTagsForToken(token);
if (tokenClassificationSpans != null) {
tags.addAll(tokenClassificationSpans);
}
if (!inBounds) {
break;
}
}
}
if (updateOffsets && extendMultiLineSpanToLine > 0) {
int endPosition =
extendMultiLineSpanToLine < snapshot.getLineCount() - 1
? snapshot
.findLineFromLineNumber(extendMultiLineSpanToLine + 1)
.getStart()
.getOffset()
: snapshot.length();
if (endPosition > extendedSpan.getEnd()) {
spanExtended = true;
extendedSpan = OffsetRegion.fromBounds(extendedSpan.getStart(), endPosition);
}
}
if (updateOffsets && spanExtended) {
/* Subtract 1 from each of these because the spans include the line break on their last
* line, forcing it to appear as the first position on the following line.
*/
assert extendedSpan.getEnd() > span.getEnd();
int firstLine = snapshot.findLineNumber(span.getEnd());
int lastLine = snapshot.findLineNumber(extendedSpan.getEnd()) - 1;
// when considering the last line of a document, span and extendedSpan may end on the same
// line
forceRehighlightLines(firstLine, Math.max(firstLine, lastLine));
}
return tags;
}