public ArrayList<StructureSkipSuggestion> getParentSkipSuggestions(int failureIndex) {
ArrayList<StructureSkipSuggestion> parentSkips = new ArrayList<StructureSkipSuggestion>();
int errorLineIndex = failureIndex;
int maxBW = Math.max(failureIndex - MAX_NR_OF_LINES, 0);
int nrOfStructs = 0;
while (errorLineIndex > maxBW && nrOfStructs < MAX_NR_OF_STRUCTURES) {
nrOfStructs++;
int startSkipIndex = findParentBegin(errorLineIndex);
ArrayList<StructureSkipSuggestion> skips = selectRegion(startSkipIndex);
if (skips.isEmpty()) {
StructureSkipSuggestion closingSkip = new StructureSkipSuggestion();
closingSkip.setSkipLocations(
IndentInfo.cloneIndentInfo(getHistory().getLine(startSkipIndex)),
IndentInfo.cloneIndentInfo(getHistory().getLine(failureIndex)),
startSkipIndex,
failureIndex);
parentSkips.add(closingSkip);
}
parentSkips.addAll(skips);
if (skips.size() > 0) errorLineIndex = skips.get(0).getIndexHistoryStart();
else errorLineIndex = -1;
}
addNextRegionMerges(parentSkips);
return parentSkips;
}
public StructureSkipSuggestion getErroneousPrefix(int failureIndex) {
StructureSkipSuggestion prefix = new StructureSkipSuggestion();
if (getHistory().getIndexLastLine() >= 0)
prefix.setSkipLocations(
IndentInfo.cloneIndentInfo(getHistory().getLine(0)),
IndentInfo.cloneIndentInfo(getHistory().getLine(failureIndex)),
0,
failureIndex);
return prefix;
}
private StructureSkipSuggestion mergeRegions(
StructureSkipSuggestion fwSuggestion, StructureSkipSuggestion bwSuggestion) {
StructureSkipSuggestion mergedSkip = new StructureSkipSuggestion();
mergedSkip.setSkipLocations(
IndentInfo.cloneIndentInfo(bwSuggestion.getStartSkip()),
IndentInfo.cloneIndentInfo(fwSuggestion.getEndSkip()),
bwSuggestion.getIndexHistoryStart(),
fwSuggestion.getIndexHistoryEnd());
mergedSkip.setAdditionalTokens(bwSuggestion.getAdditionalTokens());
return mergedSkip;
}
public ArrayList<StructureSkipSuggestion> getBlockSuggestions(int structStartIndex) {
ArrayList<StructureSkipSuggestion> result = getCurrentRegionSkips(structStartIndex);
int endIndex =
Math.min(getHistory().getIndexLastLine() + 1, structStartIndex + MAX_NR_OF_LINES);
for (int i = structStartIndex; i < endIndex; i++) {
IndentInfo startSkip = IndentInfo.cloneIndentInfo(getHistory().getLine(structStartIndex));
IndentInfo endSkip = IndentInfo.cloneIndentInfo(getHistory().getLine(i));
StructureSkipSuggestion block = new StructureSkipSuggestion();
block.setSkipLocations(startSkip, endSkip, structStartIndex, i);
result.add(block);
}
return result;
}
private void addSeperatorIncludingRegion_Backwards(
ArrayList<StructureSkipSuggestion> prevRegions, StructureSkipSuggestion previousRegion) {
int indexStart = previousRegion.getIndexHistoryStart();
if (indexStart > 0 && isSeparatorEndingLine(indexStart - 1)) {
char[] toParse = structTokens.removeSeparatorAtTheEnd(readLine(indexStart - 1));
IndentInfo startSkip2 = IndentInfo.cloneIndentInfo(getHistory().getLine(indexStart - 1));
IndentInfo endSkip2 = IndentInfo.cloneIndentInfo(previousRegion.getEndSkip());
StructureSkipSuggestion previousRegion2 = new StructureSkipSuggestion();
previousRegion2.setSkipLocations(
startSkip2, endSkip2, indexStart - 1, previousRegion.getIndexHistoryEnd());
previousRegion2.setAdditionalTokens(toParse);
prevRegions.add(previousRegion2);
}
}
private int skipLine(int indexLine) {
IndentInfo line = getHistory().getLine(indexLine);
IndentationHandler skipIndentHandler = new IndentationHandler();
getHistory().setTokenIndex(Math.max(0, line.getTokensSeen() - 1));
skipIndentHandler.setInLeftMargin(false);
getHistory().readRecoverToken(myParser, false);
while (myParser.currentToken != SGLR.EOF) {
getHistory().readRecoverToken(myParser, false);
skipIndentHandler.updateIndentation(myParser.currentToken);
if (skipIndentHandler.lineMarginEnded()) {
return indexLine += 1;
}
}
return getHistory().getIndexLastLine(); // EOF
}
private ArrayList<StructureSkipSuggestion> selectRegion(int indexLine) {
if (isScopeClosingLine(indexLine)) return new ArrayList<StructureSkipSuggestion>();
ArrayList<Integer> endLocations = findCurrentEnd(indexLine);
ArrayList<StructureSkipSuggestion> skipSuggestions = new ArrayList<StructureSkipSuggestion>();
IndentInfo startLine = IndentInfo.cloneIndentInfo(getHistory().getLine(indexLine));
for (Integer endSkipIndex : endLocations) {
if (endSkipIndex > indexLine) {
IndentInfo endSkip = IndentInfo.cloneIndentInfo(getHistory().getLine(endSkipIndex));
StructureSkipSuggestion skipConstruct = new StructureSkipSuggestion();
skipConstruct.setSkipLocations(startLine, endSkip, indexLine, endSkipIndex);
skipSuggestions.add(skipConstruct);
addSeparatorIncludingRegion_Forwards(skipSuggestions, skipConstruct);
addSeperatorIncludingRegion_Backwards(skipSuggestions, skipConstruct);
}
}
return skipSuggestions;
}
private ArrayList<Integer> findCurrentEnd(int indexStartLine) {
int indentStartLine = separatorIndent(indexStartLine);
boolean hasIndentChilds = false;
boolean isSecondLine = true;
ArrayList<Integer> endLocations = new ArrayList<Integer>();
int indexNextLine = skipLine(indexStartLine);
while (myParser.currentToken != SGLR.EOF
&& 0 <= indexNextLine
&& indexNextLine <= getHistory().getIndexLastLine()) {
IndentInfo nextLine = getHistory().getLine(indexNextLine);
// FIXME: get nextLine may be null
int indentSkipPosition = nextLine.getIndentValue();
indentShift shift = calculateShift(indentStartLine, indentSkipPosition);
switch (shift) {
case DEDENT:
endLocations.add(indexNextLine);
return endLocations;
case INDENT:
hasIndentChilds = true;
break;
case SAME_INDENT:
if (hasIndentChilds && isScopeClosingLine(indexNextLine)) {
indexNextLine = skipLine(indexNextLine);
endLocations.add(indexNextLine);
return endLocations;
}
if ((!isSecondLine || !isScopeOpeningLine(indexNextLine))
&& !isSeparatorStartingLine(indexNextLine)) {
endLocations.add(indexNextLine);
return endLocations;
}
break;
default:
break;
}
isSecondLine = false;
indexNextLine = skipLine(indexNextLine);
}
endLocations.add(getHistory().getIndexLastLine()); // EOF
return endLocations;
}
private int findParentBegin(int startLineIndex) {
int indentStartLine = separatorIndent(startLineIndex);
int indexHistoryLines = startLineIndex;
while (indexHistoryLines > 0) {
indexHistoryLines -= 1;
int indentSkipPosition = separatorIndent(indexHistoryLines); // currentLine.getIndentValue();
indentShift shift = calculateShift(indentStartLine, indentSkipPosition);
if (shift == indentShift.DEDENT) {
if (isScopeOpeningLine(indexHistoryLines)) {
IndentInfo prevLine = getHistory().getLine(indexHistoryLines - 1);
if ((!isScopeClosingLine(indexHistoryLines - 1))
&& calculateShift(indentSkipPosition, prevLine.getIndentValue())
== indentShift.SAME_INDENT) {
return indexHistoryLines - 1;
}
}
return indexHistoryLines;
}
}
return 0; // SOF
}
private ArrayList<StructureSkipSuggestion> selectPrevRegion(int indexEnd) {
ArrayList<StructureSkipSuggestion> prevRegions = new ArrayList<StructureSkipSuggestion>();
boolean onClosing = isScopeClosingLine(indexEnd);
int indexStart = findPreviousBegin(indexEnd, onClosing);
if (onClosing) {
if (indexEnd > 0) {
if (isScopeClosingLine(indexEnd - 1)) prevRegions.addAll(selectPrevRegion(indexEnd - 1));
else prevRegions.addAll(selectRegion(indexEnd - 1));
}
indexEnd++;
}
IndentInfo endSkip = IndentInfo.cloneIndentInfo(getHistory().getLine(indexEnd));
if (indexStart < 0) return prevRegions;
IndentInfo startSkip = IndentInfo.cloneIndentInfo(getHistory().getLine(indexStart));
StructureSkipSuggestion previousRegion = new StructureSkipSuggestion();
previousRegion.setSkipLocations(startSkip, endSkip, indexStart, indexEnd);
prevRegions.add(previousRegion);
addSeperatorIncludingRegion_Backwards(prevRegions, previousRegion);
addSeparatorIncludingRegion_Forwards(prevRegions, previousRegion);
return prevRegions;
}
private void addSeparatorIncludingRegion_Forwards(
ArrayList<StructureSkipSuggestion> regions, StructureSkipSuggestion aRegion) {
if (isSeparatorStartingLine(aRegion.getIndexHistoryEnd())) {
IndentInfo startSkip = IndentInfo.cloneIndentInfo(aRegion.getStartSkip());
IndentInfo endSkip = IndentInfo.cloneIndentInfo(aRegion.getEndSkip());
int indentShift = separatorIndent(aRegion.getIndexHistoryEnd()) - endSkip.getIndentValue();
endSkip.setTokensSeen(endSkip.getTokensSeen() + indentShift);
StructureSkipSuggestion previousRegion3 = new StructureSkipSuggestion();
previousRegion3.setSkipLocations(
startSkip, endSkip, aRegion.getIndexHistoryStart(), aRegion.getIndexHistoryEnd());
regions.add(previousRegion3);
}
}
private String readLine(IndentInfo line) {
int startTok = line.getTokensSeen();
String lineContent = getHistory().readLine(startTok, myParser.currentInputStream);
return lineContent;
}