/* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const EEOFCHARACTERS_NONE = 0x0000;
// to handle \<EOF> inside strings const EEOFCHARACTERS_DROPBACKSLASH = 0x0001;
// to handle \<EOF> outside strings const EEOFCHARACTERS_REPLACEMENTCHAR = 0x0002;
// to close comments const EEOFCHARACTERS_ASTERISK = 0x0004; const EEOFCHARACTERS_SLASH = 0x0008;
// to close double-quoted strings const EEOFCHARACTERS_DOUBLEQUOTE = 0x0010;
// to close single-quoted strings const EEOFCHARACTERS_SINGLEQUOTE = 0x0020;
// to close URLs const EEOFCHARACTERS_CLOSEPAREN = 0x0040;
/** * Wrapper around InspectorCSSParser. * Once/if https://github.com/servo/rust-cssparser/pull/374 lands, we can remove this class.
*/ class InspectorCSSParserWrapper {
#offset = 0;
#trackEOFChars;
#eofCharacters = EEOFCHARACTERS_NONE;
/** * * @param {String} input: The CSS text to lex * @param {Object} options * @param {Boolean} options.trackEOFChars: Set to true if performEOFFixup will be called.
*/
constructor(input, options = {}) { this.parser = new InspectorCSSParser(input); this.#trackEOFChars = options.trackEOFChars;
}
get lineNumber() { returnthis.parser.lineNumber;
}
get columnNumber() { returnthis.parser.columnNumber;
}
// For some reason, we only automatically close `url`, other functions // will have their opening parenthesis escaped. if (
(tokenType === "Function" && token.value === "url") ||
tokenType === "BadUrl" ||
(tokenType === "UnquotedUrl" && lastChar !== ")")
) { this.#eofCharacters = this.#eofCharacters | EEOFCHARACTERS_CLOSEPAREN;
}
// At the moment, InspectorCSSParser doesn't expose offsets, so we need to compute // them manually here. // We can do that because we are retrieving every token in the input string, and so the // end offset of the last token is the start offset of the new token.
token.startOffset = this.#offset; this.#offset += token.text.length;
token.endOffset = this.#offset; return token;
}
/** * When EOF is reached, the last token might be unterminated in some * ways. This method takes an input string and appends the needed * terminators. In particular: * * 1. If EOF occurs mid-string, this will append the correct quote. * 2. If EOF occurs in a url token, this will append the close paren. * 3. If EOF occurs in a comment this will append the comment closer. * * A trailing backslash might also have been present in the input * string. This is handled in different ways, depending on the * context and arguments. * * The existing backslash at the end of inputString is preserved, and a new backslash * is appended. * That is, the input |\| is transformed to |\\|, and the * input |'\| is transformed to |'\\'|. * * @param inputString the input string * @return the input string with the termination characters appended
*/
performEOFFixup(inputString) {
let result = inputString;
let eofChars = this.#eofCharacters; if (
(eofChars &
(EEOFCHARACTERS_DROPBACKSLASH | EEOFCHARACTERS_REPLACEMENTCHAR)) !=
0
) {
eofChars &= ~(
EEOFCHARACTERS_DROPBACKSLASH | EEOFCHARACTERS_REPLACEMENTCHAR
);
result += "\\";
}
if (
(eofChars & EEOFCHARACTERS_DROPBACKSLASH) != 0 &&
!!result.length &&
result.endsWith("\\")
) {
result = result.slice(0, -1);
}
// First, ignore EEOFCHARACTERS_DROPBACKSLASH.
let c = eofChars >> 1;
// All of the remaining EOFCharacters bits represent appended characters, // and the bits are in the order that they need appending. for (const p of kImpliedEOFCharacters) { if (c & 1) {
result += String.fromCharCode(p);
}
c >>= 1;
}
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