@jspm/generator/lib/html/lexer.js

Package Import Map Generation Tool

let source, i;
const alwaysSelfClosing = [
    "link",
    "base"
];
export function parseHtml(_source, tagNames = [
    "script",
    "link",
    "base",
    "!--"
]) {
    const scripts = [];
    source = _source;
    i = 0;
    let curScript = {
        tagName: undefined,
        start: -1,
        end: -1,
        attributes: [],
        innerStart: -1,
        innerEnd: -1
    };
    while(i < source.length){
        var _readTagName;
        while(source.charCodeAt(i++) !== 60 /*<*/ )if (i === source.length) return scripts;
        const start = i - 1;
        const tagName = (_readTagName = readTagName()) === null || _readTagName === void 0 ? void 0 : _readTagName.toLowerCase();
        if (tagName === "!--") {
            while(source.charCodeAt(i) !== 45 /*-*/  || source.charCodeAt(i + 1) !== 45 /*-*/  || source.charCodeAt(i + 2) !== 62 /*>*/ )if (++i === source.length) return scripts;
            scripts.push({
                tagName: "!--",
                start: start,
                end: i + 3,
                attributes: [],
                innerStart: start + 3,
                innerEnd: i
            });
            i += 3;
        } else if (tagName === undefined) {
            return scripts;
        } else if (tagNames.includes(tagName)) {
            curScript.tagName = tagName;
            curScript.start = i - tagName.length - 2;
            const attributes = curScript.attributes;
            let attr;
            while(attr = scanAttr())attributes.push(attr);
            let selfClosing = alwaysSelfClosing.includes(tagName);
            if (source.charCodeAt(i - 2) === 47 /*/*/  && source.charCodeAt(i - 1) === 62 /*>*/ ) selfClosing = true;
            if (selfClosing) {
                curScript.end = i;
            } else {
                curScript.innerStart = i;
                while(true){
                    while(source.charCodeAt(i++) !== 60 /*<*/ )if (i === source.length) return scripts;
                    const tag = readTagName();
                    if (tag === undefined) return scripts;
                    if (tag === `/${curScript.tagName}`) {
                        curScript.innerEnd = i - 8;
                        while(scanAttr());
                        curScript.end = i;
                        break;
                    }
                }
            }
            scripts.push(curScript);
            curScript = {
                tagName: undefined,
                start: -1,
                end: -1,
                attributes: [],
                innerStart: -1,
                innerEnd: -1
            };
        } else {
            while(scanAttr());
        }
    }
    return scripts;
}
function readTagName() {
    let start = i;
    let ch;
    while(!isWs(ch = source.charCodeAt(i++)) && ch !== 62 /*>*/ )if (i === source.length) return null;
    return source.slice(start, ch === 62 ? --i : i - 1);
}
function scanAttr() {
    let ch;
    while(isWs(ch = source.charCodeAt(i)))if (++i === source.length) return null;
    if (ch === 62 /*>*/  || ch === 47 /*/*/  && (ch = source.charCodeAt(++i)) === 62) {
        i++;
        return null;
    }
    const nameStart = i;
    while(!isWs(ch = source.charCodeAt(i++)) && ch !== 61 /*=*/ ){
        if (i === source.length) return null;
        if (ch === 62 /*>*/ ) {
            if (nameStart + 2 === i && source.charCodeAt(nameStart) === 47 /*/*/ ) return null;
            return {
                nameStart,
                nameEnd: --i,
                valueStart: -1,
                valueEnd: -1
            };
        }
    }
    const nameEnd = i - 1;
    if (ch !== 61 /*=*/ ) {
        while(isWs(ch = source.charCodeAt(i)) && ch !== 61 /*=*/ ){
            if (++i === source.length) return null;
            if (ch === 62 /*>*/ ) return null;
        }
        if (ch !== 61 /*=*/ ) return {
            nameStart,
            nameEnd,
            valueStart: -1,
            valueEnd: -1
        };
    }
    while(isWs(ch = source.charCodeAt(i++))){
        if (i === source.length) return null;
        if (ch === 62 /*>*/ ) return null;
    }
    if (ch === 34 /*"*/ ) {
        const valueStart = i;
        while(source.charCodeAt(i++) !== 34 /*"*/ )if (i === source.length) return null;
        return {
            nameStart,
            nameEnd,
            valueStart,
            valueEnd: i - 1
        };
    } else if (ch === 39 /*'*/ ) {
        const valueStart = i;
        while(source.charCodeAt(i++) !== 39 /*'*/ )if (i === source.length) return null;
        return {
            nameStart,
            nameEnd,
            valueStart,
            valueEnd: i - 1
        };
    } else {
        const valueStart = i - 1;
        i++;
        while(!isWs(ch = source.charCodeAt(i)) && ch !== 62 /*>*/ )if (++i === source.length) return null;
        return {
            nameStart,
            nameEnd,
            valueStart,
            valueEnd: i
        };
    }
}
export function isWs(ch) {
    return ch === 32 || ch < 14 && ch > 8;
} // function logScripts (source: string, scripts: ParsedTag[]) {
 //   for (const script of scripts) {
 //     for (const { nameStart, nameEnd, valueStart, valueEnd } of script.attributes) {
 //       console.log('Name: ' + source.slice(nameStart, nameEnd));
 //       if (valueStart !== -1)
 //         console.log('Value: ' + source.slice(valueStart, valueEnd));
 //     }
 //     console.log('"' + source.slice(script.innerStart, script.innerEnd) + '"');
 //     console.log('"' + source.slice(script.start, script.end) + '"');
 //   }
 // }


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