hexo/node_modules/parse5/dist/common/foreign-content.js

import { TAG_ID as $, NS, ATTRS, getTagID } from './html.js';
//MIME types
const MIME_TYPES = {
    TEXT_HTML: 'text/html',
    APPLICATION_XML: 'application/xhtml+xml',
};
//Attributes
const DEFINITION_URL_ATTR = 'definitionurl';
const ADJUSTED_DEFINITION_URL_ATTR = 'definitionURL';
const SVG_ATTRS_ADJUSTMENT_MAP = new Map([
    'attributeName',
    'attributeType',
    'baseFrequency',
    'baseProfile',
    'calcMode',
    'clipPathUnits',
    'diffuseConstant',
    'edgeMode',
    'filterUnits',
    'glyphRef',
    'gradientTransform',
    'gradientUnits',
    'kernelMatrix',
    'kernelUnitLength',
    'keyPoints',
    'keySplines',
    'keyTimes',
    'lengthAdjust',
    'limitingConeAngle',
    'markerHeight',
    'markerUnits',
    'markerWidth',
    'maskContentUnits',
    'maskUnits',
    'numOctaves',
    'pathLength',
    'patternContentUnits',
    'patternTransform',
    'patternUnits',
    'pointsAtX',
    'pointsAtY',
    'pointsAtZ',
    'preserveAlpha',
    'preserveAspectRatio',
    'primitiveUnits',
    'refX',
    'refY',
    'repeatCount',
    'repeatDur',
    'requiredExtensions',
    'requiredFeatures',
    'specularConstant',
    'specularExponent',
    'spreadMethod',
    'startOffset',
    'stdDeviation',
    'stitchTiles',
    'surfaceScale',
    'systemLanguage',
    'tableValues',
    'targetX',
    'targetY',
    'textLength',
    'viewBox',
    'viewTarget',
    'xChannelSelector',
    'yChannelSelector',
    'zoomAndPan',
].map((attr) => [attr.toLowerCase(), attr]));
const XML_ATTRS_ADJUSTMENT_MAP = new Map([
    ['xlink:actuate', { prefix: 'xlink', name: 'actuate', namespace: NS.XLINK }],
    ['xlink:arcrole', { prefix: 'xlink', name: 'arcrole', namespace: NS.XLINK }],
    ['xlink:href', { prefix: 'xlink', name: 'href', namespace: NS.XLINK }],
    ['xlink:role', { prefix: 'xlink', name: 'role', namespace: NS.XLINK }],
    ['xlink:show', { prefix: 'xlink', name: 'show', namespace: NS.XLINK }],
    ['xlink:title', { prefix: 'xlink', name: 'title', namespace: NS.XLINK }],
    ['xlink:type', { prefix: 'xlink', name: 'type', namespace: NS.XLINK }],
    ['xml:base', { prefix: 'xml', name: 'base', namespace: NS.XML }],
    ['xml:lang', { prefix: 'xml', name: 'lang', namespace: NS.XML }],
    ['xml:space', { prefix: 'xml', name: 'space', namespace: NS.XML }],
    ['xmlns', { prefix: '', name: 'xmlns', namespace: NS.XMLNS }],
    ['xmlns:xlink', { prefix: 'xmlns', name: 'xlink', namespace: NS.XMLNS }],
]);
//SVG tag names adjustment map
export const SVG_TAG_NAMES_ADJUSTMENT_MAP = new Map([
    'altGlyph',
    'altGlyphDef',
    'altGlyphItem',
    'animateColor',
    'animateMotion',
    'animateTransform',
    'clipPath',
    'feBlend',
    'feColorMatrix',
    'feComponentTransfer',
    'feComposite',
    'feConvolveMatrix',
    'feDiffuseLighting',
    'feDisplacementMap',
    'feDistantLight',
    'feFlood',
    'feFuncA',
    'feFuncB',
    'feFuncG',
    'feFuncR',
    'feGaussianBlur',
    'feImage',
    'feMerge',
    'feMergeNode',
    'feMorphology',
    'feOffset',
    'fePointLight',
    'feSpecularLighting',
    'feSpotLight',
    'feTile',
    'feTurbulence',
    'foreignObject',
    'glyphRef',
    'linearGradient',
    'radialGradient',
    'textPath',
].map((tn) => [tn.toLowerCase(), tn]));
//Tags that causes exit from foreign content
const EXITS_FOREIGN_CONTENT = new Set([
    $.B,
    $.BIG,
    $.BLOCKQUOTE,
    $.BODY,
    $.BR,
    $.CENTER,
    $.CODE,
    $.DD,
    $.DIV,
    $.DL,
    $.DT,
    $.EM,
    $.EMBED,
    $.H1,
    $.H2,
    $.H3,
    $.H4,
    $.H5,
    $.H6,
    $.HEAD,
    $.HR,
    $.I,
    $.IMG,
    $.LI,
    $.LISTING,
    $.MENU,
    $.META,
    $.NOBR,
    $.OL,
    $.P,
    $.PRE,
    $.RUBY,
    $.S,
    $.SMALL,
    $.SPAN,
    $.STRONG,
    $.STRIKE,
    $.SUB,
    $.SUP,
    $.TABLE,
    $.TT,
    $.U,
    $.UL,
    $.VAR,
]);
//Check exit from foreign content
export function causesExit(startTagToken) {
    const tn = startTagToken.tagID;
    const isFontWithAttrs = tn === $.FONT &&
        startTagToken.attrs.some(({ name }) => name === ATTRS.COLOR || name === ATTRS.SIZE || name === ATTRS.FACE);
    return isFontWithAttrs || EXITS_FOREIGN_CONTENT.has(tn);
}
//Token adjustments
export function adjustTokenMathMLAttrs(token) {
    for (let i = 0; i < token.attrs.length; i++) {
        if (token.attrs[i].name === DEFINITION_URL_ATTR) {
            token.attrs[i].name = ADJUSTED_DEFINITION_URL_ATTR;
            break;
        }
    }
}
export function adjustTokenSVGAttrs(token) {
    for (let i = 0; i < token.attrs.length; i++) {
        const adjustedAttrName = SVG_ATTRS_ADJUSTMENT_MAP.get(token.attrs[i].name);
        if (adjustedAttrName != null) {
            token.attrs[i].name = adjustedAttrName;
        }
    }
}
export function adjustTokenXMLAttrs(token) {
    for (let i = 0; i < token.attrs.length; i++) {
        const adjustedAttrEntry = XML_ATTRS_ADJUSTMENT_MAP.get(token.attrs[i].name);
        if (adjustedAttrEntry) {
            token.attrs[i].prefix = adjustedAttrEntry.prefix;
            token.attrs[i].name = adjustedAttrEntry.name;
            token.attrs[i].namespace = adjustedAttrEntry.namespace;
        }
    }
}
export function adjustTokenSVGTagName(token) {
    const adjustedTagName = SVG_TAG_NAMES_ADJUSTMENT_MAP.get(token.tagName);
    if (adjustedTagName != null) {
        token.tagName = adjustedTagName;
        token.tagID = getTagID(token.tagName);
    }
}
//Integration points
function isMathMLTextIntegrationPoint(tn, ns) {
    return ns === NS.MATHML && (tn === $.MI || tn === $.MO || tn === $.MN || tn === $.MS || tn === $.MTEXT);
}
function isHtmlIntegrationPoint(tn, ns, attrs) {
    if (ns === NS.MATHML && tn === $.ANNOTATION_XML) {
        for (let i = 0; i < attrs.length; i++) {
            if (attrs[i].name === ATTRS.ENCODING) {
                const value = attrs[i].value.toLowerCase();
                return value === MIME_TYPES.TEXT_HTML || value === MIME_TYPES.APPLICATION_XML;
            }
        }
    }
    return ns === NS.SVG && (tn === $.FOREIGN_OBJECT || tn === $.DESC || tn === $.TITLE);
}
export function isIntegrationPoint(tn, ns, attrs, foreignNS) {
    return (((!foreignNS || foreignNS === NS.HTML) && isHtmlIntegrationPoint(tn, ns, attrs)) ||
        ((!foreignNS || foreignNS === NS.MATHML) && isMathMLTextIntegrationPoint(tn, ns)));
}
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