private void buildFromDocstring(@NotNull final PsiElement elementDefinition, boolean isProperty) {
PyClass pyClass = null;
final PyStringLiteralExpression docStringExpression =
((PyDocStringOwner) elementDefinition).getDocStringExpression();
if (elementDefinition instanceof PyClass) {
pyClass = (PyClass) elementDefinition;
myBody.add(PythonDocumentationProvider.describeDecorators(pyClass, TagItalic, BR, LCombUp));
myBody.add(PythonDocumentationProvider.describeClass(pyClass, TagBold, true, false));
} else if (elementDefinition instanceof PyFunction) {
PyFunction pyFunction = (PyFunction) elementDefinition;
if (!isProperty) {
pyClass = pyFunction.getContainingClass();
if (pyClass != null) {
myBody
.addWith(
TagSmall, PythonDocumentationProvider.describeClass(pyClass, TagCode, true, true))
.addItem(BR)
.addItem(BR);
}
}
myBody
.add(PythonDocumentationProvider.describeDecorators(pyFunction, TagItalic, BR, LCombUp))
.add(PythonDocumentationProvider.describeFunction(pyFunction, TagBold, LCombUp));
if (docStringExpression == null) {
addInheritedDocString(pyFunction, pyClass);
}
} else if (elementDefinition instanceof PyFile) {
addModulePath((PyFile) elementDefinition);
}
if (docStringExpression != null) {
myBody.addItem(BR);
addFormattedDocString(myElement, docStringExpression.getStringValue(), myBody, myEpilog);
}
}
/**
* Adds type and description representation from function docstring
*
* @param parameter parameter of a function
* @return true if type from docstring was added
*/
private boolean addTypeAndDescriptionFromDocstring(@NotNull final PyNamedParameter parameter) {
final PyFunction function = PsiTreeUtil.getParentOfType(parameter, PyFunction.class);
if (function != null) {
final String docString = PyPsiUtils.strValue(function.getDocStringExpression());
final Pair<String, String> typeAndDescr = getTypeAndDescription(docString, parameter);
final String type = typeAndDescr.first;
final String description = typeAndDescr.second;
if (type != null) {
final PyType pyType = PyTypeParser.getTypeByName(parameter, type);
if (pyType instanceof PyClassType) {
myBody
.addItem(": ")
.addWith(
new LinkWrapper(PythonDocumentationProvider.LINK_TYPE_PARAM),
$(pyType.getName()));
} else {
myBody.addItem(": ").addItem(type);
}
}
if (description != null) {
myEpilog.addItem(BR).addItem(description);
}
return type != null;
}
return false;
}
private void addModulePath(PyFile followed) {
// what to prepend to a module description?
final VirtualFile file = followed.getVirtualFile();
if (file == null) {
myProlog.addWith(TagSmall, $(PyBundle.message("QDOC.module.path.unknown")));
} else {
final String path = file.getPath();
RootFinder finder = new RootFinder(path);
RootVisitorHost.visitRoots(followed, finder);
final String rootPath = finder.getResult();
if (rootPath != null) {
String afterPart = path.substring(rootPath.length());
myProlog.addWith(TagSmall, $(rootPath).addWith(TagBold, $(afterPart)));
} else {
myProlog.addWith(TagSmall, $(path));
}
}
}
private static void addFormattedDocString(
PsiElement element,
@NotNull String docstring,
ChainIterable<String> formattedOutput,
ChainIterable<String> unformattedOutput) {
final Project project = element.getProject();
List<String> formatted = PyStructuredDocstringFormatter.formatDocstring(element, docstring);
if (formatted != null) {
unformattedOutput.add(formatted);
return;
}
boolean isFirstLine;
final List<String> result = new ArrayList<String>();
String[] lines = removeCommonIndentation(docstring);
// reconstruct back, dropping first empty fragment as needed
isFirstLine = true;
int tabSize = CodeStyleSettingsManager.getSettings(project).getTabSize(PythonFileType.INSTANCE);
for (String line : lines) {
if (isFirstLine && ourSpacesPattern.matcher(line).matches())
continue; // ignore all initial whitespace
if (isFirstLine) {
isFirstLine = false;
} else {
result.add(BR);
}
int leadingTabs = 0;
while (leadingTabs < line.length() && line.charAt(leadingTabs) == '\t') {
leadingTabs++;
}
if (leadingTabs > 0) {
line = StringUtil.repeatSymbol(' ', tabSize * leadingTabs) + line.substring(leadingTabs);
}
result.add(combUp(line));
}
formattedOutput.add(result);
}
private void buildFromParameter(
@NotNull final TypeEvalContext context,
@Nullable final PsiElement outerElement,
@NotNull final PsiElement elementDefinition) {
myBody.addItem(combUp("Parameter " + PyUtil.getReadableRepr(elementDefinition, false)));
boolean typeFromDocstringAdded =
addTypeAndDescriptionFromDocstring((PyNamedParameter) elementDefinition);
if (outerElement instanceof PyExpression) {
PyType type = context.getType((PyExpression) outerElement);
if (type != null) {
String typeString = null;
if (type instanceof PyDynamicallyEvaluatedType) {
if (!typeFromDocstringAdded) {
typeString = "\nDynamically inferred type: ";
}
} else {
if (outerElement.getReference() != null) {
PsiElement target = outerElement.getReference().resolve();
if (target instanceof PyTargetExpression) {
final String targetName = ((PyTargetExpression) target).getName();
if (targetName != null
&& targetName.equals(((PyNamedParameter) elementDefinition).getName())) {
typeString = "\nReassigned value has type: ";
}
}
}
}
if (typeString == null && !typeFromDocstringAdded) {
typeString = "\nInferred type: ";
}
if (typeString != null) {
myBody.addItem(combUp(typeString));
PythonDocumentationProvider.describeTypeWithLinks(
myBody, elementDefinition, type, context);
}
}
}
}
@Nullable
private PsiElement resolveToDocStringOwner() {
// here the ^Q target is already resolved; the resolved element may point to intermediate
// assignments
if (myElement instanceof PyTargetExpression) {
final String targetName = myElement.getText();
myReassignmentChain.addWith(
TagSmall, $(PyBundle.message("QDOC.assigned.to.$0", targetName)).addItem(BR));
final PyExpression assignedValue = ((PyTargetExpression) myElement).findAssignedValue();
if (assignedValue instanceof PyReferenceExpression) {
final PsiElement resolved = resolveWithoutImplicits((PyReferenceExpression) assignedValue);
if (resolved != null) {
return resolved;
}
}
return assignedValue;
}
if (myElement instanceof PyReferenceExpression) {
myReassignmentChain.addWith(
TagSmall, $(PyBundle.message("QDOC.assigned.to.$0", myElement.getText())).addItem(BR));
return resolveWithoutImplicits((PyReferenceExpression) myElement);
}
// it may be a call to a standard wrapper
if (myElement instanceof PyCallExpression) {
final PyCallExpression call = (PyCallExpression) myElement;
final Pair<String, PyFunction> wrapInfo =
PyCallExpressionHelper.interpretAsModifierWrappingCall(call, myOriginalElement);
if (wrapInfo != null) {
String wrapperName = wrapInfo.getFirst();
PyFunction wrappedFunction = wrapInfo.getSecond();
myReassignmentChain.addWith(
TagSmall, $(PyBundle.message("QDOC.wrapped.in.$0", wrapperName)).addItem(BR));
return wrappedFunction;
}
}
return myElement;
}
public PyDocumentationBuilder(PsiElement element, PsiElement originalElement) {
myElement = element;
myOriginalElement = originalElement;
myResult = new ChainIterable<String>();
myProlog = new ChainIterable<String>();
myBody = new ChainIterable<String>();
myEpilog = new ChainIterable<String>();
myResult
.add(myProlog)
.addWith(TagCode, myBody)
.add(myEpilog); // pre-assemble; then add stuff to individual cats as needed
myResult = wrapInTag("html", wrapInTag("body", myResult));
myReassignmentChain = new ChainIterable<String>();
}
private void buildForKeyword(@NotNull final String name) {
try {
final FileReader reader =
new FileReader(PythonHelpersLocator.getHelperPath("/tools/python_keywords/" + name));
try {
final String text = FileUtil.loadTextAndClose(reader);
myEpilog.addItem(text);
} catch (IOException ignored) {
} finally {
try {
reader.close();
} catch (IOException ignored) {
}
}
} catch (FileNotFoundException ignored) {
}
}
private void buildFromAttributeDoc() {
PyClass cls = PsiTreeUtil.getParentOfType(myElement, PyClass.class);
assert cls != null;
String type =
PyUtil.isInstanceAttribute((PyExpression) myElement)
? "Instance attribute "
: "Class attribute ";
myProlog
.addItem(type)
.addWith(TagBold, $().addWith(TagCode, $(((PyTargetExpression) myElement).getName())))
.addItem(" of class ")
.addWith(PythonDocumentationProvider.LinkMyClass, $().addWith(TagCode, $(cls.getName())))
.addItem(BR);
final String docString = ((PyTargetExpression) myElement).getDocStringValue();
if (docString != null) {
addFormattedDocString(myElement, docString, myBody, myEpilog);
}
}
private void addPredefinedMethodDoc(PyFunction fun, String mothodName) {
PyClassType objectType =
PyBuiltinCache.getInstance(fun)
.getObjectType(); // old- and new-style classes share the __xxx__ stuff
if (objectType != null) {
PyClass objectClass = objectType.getPyClass();
PyFunction predefinedMethod = objectClass.findMethodByName(mothodName, false);
if (predefinedMethod != null) {
PyStringLiteralExpression predefinedDocstring = predefinedMethod.getDocStringExpression();
String predefinedDoc =
predefinedDocstring != null ? predefinedDocstring.getStringValue() : null;
if (predefinedDoc != null
&& predefinedDoc.length() > 1) { // only a real-looking doc string counts
addFormattedDocString(fun, predefinedDoc, myBody, myBody);
myEpilog.addItem(BR).addItem(BR).addItem(PyBundle.message("QDOC.copied.from.builtin"));
}
}
}
}
public String build() {
final TypeEvalContext context =
TypeEvalContext.userInitiated(myElement.getProject(), myElement.getContainingFile());
final PsiElement outerElement =
myOriginalElement != null ? myOriginalElement.getParent() : null;
final PsiElement elementDefinition = resolveToDocStringOwner();
final boolean isProperty = buildFromProperty(elementDefinition, outerElement, context);
if (myProlog.isEmpty() && !isProperty && !isAttribute()) {
myProlog.add(myReassignmentChain);
}
if (elementDefinition instanceof PyDocStringOwner) {
buildFromDocstring(elementDefinition, isProperty);
} else if (isAttribute()) {
buildFromAttributeDoc();
} else if (elementDefinition instanceof PyNamedParameter) {
buildFromParameter(context, outerElement, elementDefinition);
} else if (elementDefinition != null && outerElement instanceof PyReferenceExpression) {
myBody.addItem(combUp("\nInferred type: "));
PythonDocumentationProvider.describeExpressionTypeWithLinks(
myBody, (PyReferenceExpression) outerElement, context);
}
if (elementDefinition != null
&& PythonDialectsTokenSetProvider.INSTANCE
.getKeywordTokens()
.contains(elementDefinition.getNode().getElementType())) {
buildForKeyword(elementDefinition.getText());
}
if (myBody.isEmpty() && myEpilog.isEmpty()) {
return null; // got nothing substantial to say!
} else {
return myResult.toString();
}
}
private void addInheritedDocString(
@NotNull final PyFunction pyFunction, @Nullable final PyClass pyClass) {
boolean notFound = true;
final String methodName = pyFunction.getName();
if (pyClass == null || methodName == null) {
return;
}
final boolean isConstructor = PyNames.INIT.equals(methodName);
Iterable<PyClass> classes = pyClass.getAncestorClasses(null);
if (isConstructor) {
// look at our own class again and maybe inherit class's doc
classes = new ChainIterable<PyClass>(pyClass).add(classes);
}
for (PyClass ancestor : classes) {
PyStringLiteralExpression docstringElement = null;
PyFunction inherited = null;
boolean isFromClass = false;
if (isConstructor) docstringElement = pyClass.getDocStringExpression();
if (docstringElement != null) {
isFromClass = true;
} else {
inherited = ancestor.findMethodByName(methodName, false);
}
if (inherited != null) {
docstringElement = inherited.getDocStringExpression();
}
if (docstringElement != null) {
final String inheritedDoc = docstringElement.getStringValue();
if (inheritedDoc.length() > 1) {
myEpilog.addItem(BR).addItem(BR);
String ancestor_name = ancestor.getName();
String marker =
(pyClass == ancestor)
? PythonDocumentationProvider.LINK_TYPE_CLASS
: PythonDocumentationProvider.LINK_TYPE_PARENT;
final String ancestor_link =
$().addWith(new LinkWrapper(marker + ancestor_name), $(ancestor_name)).toString();
if (isFromClass) {
myEpilog.addItem(PyBundle.message("QDOC.copied.from.class.$0", ancestor_link));
} else {
myEpilog.addItem(PyBundle.message("QDOC.copied.from.$0.$1", ancestor_link, methodName));
}
myEpilog.addItem(BR).addItem(BR);
ChainIterable<String> formatted = new ChainIterable<String>();
ChainIterable<String> unformatted = new ChainIterable<String>();
addFormattedDocString(pyFunction, inheritedDoc, formatted, unformatted);
myEpilog.addWith(TagCode, formatted).add(unformatted);
notFound = false;
break;
}
}
}
if (notFound) {
// above could have not worked because inheritance is not searched down to 'object'.
// for well-known methods, copy built-in doc string.
// TODO: also handle predefined __xxx__ that are not part of 'object'.
if (PyNames.UnderscoredAttributes.contains(methodName)) {
addPredefinedMethodDoc(pyFunction, methodName);
}
}
}
private boolean buildFromProperty(
PsiElement elementDefinition,
@Nullable final PsiElement outerElement,
@NotNull final TypeEvalContext context) {
if (myOriginalElement == null) {
return false;
}
final String elementName = myOriginalElement.getText();
if (!PyNames.isIdentifier(elementName)) {
return false;
}
if (!(outerElement instanceof PyQualifiedExpression)) {
return false;
}
final PyExpression qualifier = ((PyQualifiedExpression) outerElement).getQualifier();
if (qualifier == null) {
return false;
}
final PyType type = context.getType(qualifier);
if (!(type instanceof PyClassType)) {
return false;
}
final PyClass cls = ((PyClassType) type).getPyClass();
final Property property = cls.findProperty(elementName, true, null);
if (property == null) {
return false;
}
final AccessDirection direction = AccessDirection.of((PyElement) outerElement);
final Maybe<PyCallable> accessor = property.getByDirection(direction);
myProlog
.addItem("property ")
.addWith(TagBold, $().addWith(TagCode, $(elementName)))
.addItem(" of ")
.add(PythonDocumentationProvider.describeClass(cls, TagCode, true, true));
if (accessor.isDefined() && property.getDoc() != null) {
myBody.addItem(": ").addItem(property.getDoc()).addItem(BR);
} else {
final PyCallable getter = property.getGetter().valueOrNull();
if (getter != null && getter != myElement && getter instanceof PyFunction) {
// not in getter, getter's doc comment may be useful
final PyStringLiteralExpression docstring = ((PyFunction) getter).getDocStringExpression();
if (docstring != null) {
myProlog
.addItem(BR)
.addWith(TagItalic, $("Copied from getter:"))
.addItem(BR)
.addItem(docstring.getStringValue());
}
}
myBody.addItem(BR);
}
myBody.addItem(BR);
if (accessor.isDefined() && accessor.value() == null) elementDefinition = null;
final String accessorKind = getAccessorKind(direction);
if (elementDefinition != null) {
myEpilog.addWith(TagSmall, $(BR, BR, accessorKind, " of property")).addItem(BR);
}
if (!(elementDefinition instanceof PyDocStringOwner)) {
myBody
.addWith(
TagItalic,
elementDefinition != null ? $("Declaration: ") : $(accessorKind + " is not defined."))
.addItem(BR);
if (elementDefinition != null) {
myBody.addItem(combUp(PyUtil.getReadableRepr(elementDefinition, false)));
}
}
return true;
}
