com.google.javascript.jscomp.DisambiguatePrivateProperties.java Source code

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Here is the source code for com.google.javascript.jscomp.DisambiguatePrivateProperties.java

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/*
 * Copyright 2013 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.common.collect.ImmutableSet;
import com.google.javascript.rhino.Node;
import com.google.javascript.rhino.Token;

import java.util.Collection;

/**
 * Disambiguate properties by file, when they are private by naming convention.
 */
class DisambiguatePrivateProperties implements NodeTraversal.Callback, CompilerPass {

    private final AbstractCompiler compiler;
    private final ImmutableSet<String> blacklist;
    private String fileid;
    private int id = 0;

    DisambiguatePrivateProperties(AbstractCompiler compiler) {
        this.compiler = compiler;
        CodingConvention convention = this.compiler.getCodingConvention();
        Collection<String> indirect = convention.getIndirectlyDeclaredProperties();
        blacklist = ImmutableSet.copyOf(indirect);
    }

    @Override
    public void process(Node externs, Node root) {
        NodeTraversal.traverse(compiler, root, this);
    }

    @Override
    public boolean shouldTraverse(NodeTraversal t, Node n, Node parent) {
        if (n.isScript()) {
            this.fileid = "$" + this.id++;
        }
        return true;
    }

    @Override
    public void visit(NodeTraversal t, Node n, Node parent) {
        switch (n.getType()) {
        case Token.GETPROP:
            maybeRename(n.getLastChild());
            break;
        case Token.STRING_KEY:
        case Token.GETTER_DEF:
        case Token.SETTER_DEF:
        case Token.MEMBER_FUNCTION_DEF:
            maybeRename(n);
            break;
        }
    }

    private void maybeRename(Node n) {
        CodingConvention convention = compiler.getCodingConvention();
        String prop = n.getString();
        if (!n.getBooleanProp(Node.QUOTED_PROP) && convention.isPrivate(prop) && !blacklist.contains(prop)) {
            n.setString(prop + fileid);
            compiler.reportCodeChange();
        }
    }
}