/*
 * Copyright 2010 Jon S Akhtar (Sylvanaar)
 *
 *   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.sylvanaar.idea.Lua.lang.lexer;

/**
 * Created by IntelliJ IDEA.
 * User: jon
 * Date: Apr 3, 2010
 * Time: 2:15:34 AM
 */
public class ExtendedSyntaxStrCommentHandler {
    /* Code to handle extended quote/comment syntax
    *
    * There is a basic assumption that inside a longstring or longcomment
    * you cannot begin another longstring or comment, thus there is only
    * ever 1 closing bracket to track, and once found no more closing brackets are valid
    * until another opening bracket.
    * */
    int longQLevel = 0;

    boolean isCurrentExtQuoteStart(CharSequence endQuote) {
        int level = getLevel(endQuote);
        return longQLevel == level;
    }

    void resetCurrentExtQuoteStart() {
        longQLevel=0;
    }

    void setCurrentExtQuoteStart(CharSequence cs) {
        int level = getLevel(cs);

        longQLevel = level;
    }

    private static int getLevel(CharSequence cs) {
        int level = 0;
        int comment = 0;
        while (cs.charAt(comment) == '-') comment++;
        while (cs.length() > comment+level && cs.charAt(comment+1+level) == '=') level++;
        return level;
    }

}