com.google.javascript.jscomp.SuppressDocWarningsGuard Maven / Gradle / Ivy
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/*
* Copyright 2010 The Closure Compiler Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.javascript.jscomp;
import com.google.javascript.rhino.JSDocInfo;
import com.google.javascript.rhino.Node;
import com.google.javascript.rhino.Token;
import java.util.HashMap;
import java.util.Map;
/**
* Filters warnings based on in-code {@code @suppress} annotations.
*
* Works by looking at the AST node associated with the warning, and looking
* at parents of the node until it finds a function or a script.
* For this reason, it doesn't work for warnings without an associated AST node,
* eg, the ones in parsing/IRFactory. They can be turned off with jscomp_off.
*
* @author [email protected] (Nick Santos)
*/
class SuppressDocWarningsGuard extends WarningsGuard {
private static final long serialVersionUID = 1L;
/** Warnings guards for each suppressible warnings group, indexed by name. */
private final Map suppressors =
new HashMap<>();
/**
* The suppressible groups, indexed by name.
*/
SuppressDocWarningsGuard(Map suppressibleGroups) {
for (Map.Entry entry :
suppressibleGroups.entrySet()) {
suppressors.put(
entry.getKey(),
new DiagnosticGroupWarningsGuard(
entry.getValue(),
CheckLevel.OFF));
}
}
@Override
public CheckLevel level(JSError error) {
Node node = error.node;
if (node != null) {
boolean visitedFunction = false;
for (Node current = node;
current != null;
current = current.getParent()) {
int type = current.getType();
JSDocInfo info = null;
if (type == Token.FUNCTION) {
info = NodeUtil.getBestJSDocInfo(current);
visitedFunction = true;
} else if (type == Token.SCRIPT) {
info = current.getJSDocInfo();
} else if (current.isVar() || current.isAssign()) {
// There's one edge case we're worried about:
// if the warning points to an assignment to a function, we
// want the suppressions on that function to apply.
// It's OK if we double-count some cases.
Node rhs = NodeUtil.getRValueOfLValue(current.getFirstChild());
if (rhs != null) {
if (rhs.isCast()) {
rhs = rhs.getFirstChild();
}
if (rhs.isFunction() && !visitedFunction) {
info = NodeUtil.getBestJSDocInfo(current);
}
}
}
if (info != null) {
for (String suppressor : info.getSuppressions()) {
WarningsGuard guard = suppressors.get(suppressor);
// Some @suppress tags are for other tools, and
// may not have a warnings guard.
if (guard != null) {
CheckLevel newLevel = guard.level(error);
if (newLevel != null) {
return newLevel;
}
}
}
}
}
}
return null;
}
@Override
public int getPriority() {
// Happens after path-based filtering, but before other times
// of filtering.
return WarningsGuard.Priority.SUPPRESS_DOC.value;
}
}