public static PsiElement[] parsePattern(
Project project,
String context,
String pattern,
FileType fileType,
Language language,
String extension,
boolean physical) {
int offset = context.indexOf(PATTERN_PLACEHOLDER);
final int patternLength = pattern.length();
final String patternInContext = context.replace(PATTERN_PLACEHOLDER, pattern);
final String ext = extension != null ? extension : fileType.getDefaultExtension();
final String name = "__dummy." + ext;
final PsiFileFactory factory = PsiFileFactory.getInstance(project);
final PsiFile file =
language == null
? factory.createFileFromText(
name, fileType, patternInContext, LocalTimeCounter.currentTime(), physical, true)
: factory.createFileFromText(name, language, patternInContext, physical, true);
if (file == null) {
return PsiElement.EMPTY_ARRAY;
}
final List<PsiElement> result = new ArrayList<PsiElement>();
PsiElement element = file.findElementAt(offset);
if (element == null) {
return PsiElement.EMPTY_ARRAY;
}
PsiElement topElement = element;
element = element.getParent();
while (element != null) {
if (element.getTextRange().getStartOffset() == offset
&& element.getTextLength() <= patternLength) {
topElement = element;
}
element = element.getParent();
}
if (topElement instanceof PsiFile) {
return topElement.getChildren();
}
final int endOffset = offset + patternLength;
result.add(topElement);
topElement = topElement.getNextSibling();
while (topElement != null && topElement.getTextRange().getEndOffset() <= endOffset) {
result.add(topElement);
topElement = topElement.getNextSibling();
}
return result.toArray(new PsiElement[result.size()]);
}
private void initTopLevelElement(PsiElement element) {
CompiledPattern pattern = myGlobalVisitor.getContext().getPattern();
PsiElement newElement = SkippingHandler.skipNodeIfNeccessary(element);
if (element != newElement && newElement != null) {
// way to support partial matching (ex. if ($condition$) )
newElement.accept(this);
pattern.setHandler(element, new LightTopLevelMatchingHandler(pattern.getHandler(element)));
} else {
myGlobalVisitor.setCodeBlockLevel(myGlobalVisitor.getCodeBlockLevel() + 1);
for (PsiElement el = element.getFirstChild(); el != null; el = el.getNextSibling()) {
if (GlobalCompilingVisitor.getFilter().accepts(el)) {
if (el instanceof PsiWhiteSpace) {
myGlobalVisitor.addLexicalNode(el);
}
} else {
el.accept(this);
MatchingHandler matchingHandler = pattern.getHandler(el);
pattern.setHandler(
el,
element == myTopElement
? new TopLevelMatchingHandler(matchingHandler)
: new LightTopLevelMatchingHandler(matchingHandler));
/*
do not assign light-top-level handlers through skipping, because it is incorrect;
src: if (...) { st1; st2; }
pattern: if (...) {$a$;}
$a$ will have top-level handler, so matching will be considered as correct, although "st2;" is left!
*/
}
}
myGlobalVisitor.setCodeBlockLevel(myGlobalVisitor.getCodeBlockLevel() - 1);
pattern.setHandler(element, new TopLevelMatchingHandler(pattern.getHandler(element)));
}
}