Example usage for com.google.common.css.compiler.ast StringCharStream convertToCharacterIndex

Introduction

In this page you can find the example usage for com.google.common.css.compiler.ast StringCharStream convertToCharacterIndex.

Prototype

public int convertToCharacterIndex(int lineNumber, int indexInLine) 

Source Link

Document

Returns an absolute character location for given line and column location.

Usage

From source file:io.bazel.rules.closure.webfiles.compiler.CssParser.java

/**
 * Skips current statement (a ruleset or an at-rule) and gets back to the "top level" so that it
 * can continue to parse. See <a href="http://www.w3.org/TR/css-syntax-3/#error-handling">W3C CSS3
 * Error Handling</a>./*from   w  w w.j  a va 2s.c  o m*/
 */
private static int skipCurrentStatement(GssParserCC parser, StringCharStream stream, int begin) {
    // Back up to the beginning of the current statement
    // NOTE: StringCharStream points 0-based index of the last read char, that's like (-1)-based
    stream.backup(stream.getCharIndex() - begin + 1);
    // Clear prefetched token
    parser.token.next = null;
    // Skip until the end of current statement
    Token t = parser.getToken(1);
    // At the "top level" of a stylesheet, an <at-keyword-token> starts an at-rule. Anything else
    // starts a qualified rule.
    if (t.kind == GssParserCCConstants.ATKEYWORD || t.kind == GssParserCCConstants.ATLIST
            || t.kind == GssParserCCConstants.ATRULESWITHDECLBLOCK) {
        // An at-rule ends with a semicolon or a block
        t = skipUntil(parser, GssParserCCConstants.LEFTBRACE, GssParserCCConstants.SEMICOLON);
        if (t.kind == GssParserCCConstants.LEFTBRACE) {
            // An opening curly-brace starts the at-rules body. The at-rule seeks forward, matching
            // blocks (content surrounded by (), {}, or []) until it finds a closing curly-brace that
            // isnt matched by anything else or inside of another block.
            t = skipUntil(parser, GssParserCCConstants.RIGHTBRACE);
        } else {
            // A semicolon ends the at-rule immediately
        }
    } else {
        // A qualified ruleset ends with a block
        t = skipUntil(parser, GssParserCCConstants.LEFTBRACE);
        if (t.kind == GssParserCCConstants.LEFTBRACE) {
            t = skipUntil(parser, GssParserCCConstants.RIGHTBRACE);
        }
    }
    // NOTE: +1 for end-index because a location is represented as a closed range
    return stream.convertToCharacterIndex(t.endLine, t.endColumn) + 1;
}

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