'use strict';
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const Tokenizer = require('../tokenizer');
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const HTML = require('./html');
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//Aliases
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const $ = HTML.TAG_NAMES;
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const NS = HTML.NAMESPACES;
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const ATTRS = HTML.ATTRS;
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//MIME types
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const MIME_TYPES = {
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TEXT_HTML: 'text/html',
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APPLICATION_XML: 'application/xhtml+xml'
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};
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//Attributes
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const DEFINITION_URL_ATTR = 'definitionurl';
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const ADJUSTED_DEFINITION_URL_ATTR = 'definitionURL';
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const SVG_ATTRS_ADJUSTMENT_MAP = {
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attributename: 'attributeName',
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attributetype: 'attributeType',
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basefrequency: 'baseFrequency',
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baseprofile: 'baseProfile',
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calcmode: 'calcMode',
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clippathunits: 'clipPathUnits',
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diffuseconstant: 'diffuseConstant',
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edgemode: 'edgeMode',
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filterunits: 'filterUnits',
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glyphref: 'glyphRef',
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gradienttransform: 'gradientTransform',
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gradientunits: 'gradientUnits',
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kernelmatrix: 'kernelMatrix',
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kernelunitlength: 'kernelUnitLength',
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keypoints: 'keyPoints',
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keysplines: 'keySplines',
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keytimes: 'keyTimes',
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lengthadjust: 'lengthAdjust',
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limitingconeangle: 'limitingConeAngle',
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markerheight: 'markerHeight',
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markerunits: 'markerUnits',
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markerwidth: 'markerWidth',
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maskcontentunits: 'maskContentUnits',
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maskunits: 'maskUnits',
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numoctaves: 'numOctaves',
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pathlength: 'pathLength',
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patterncontentunits: 'patternContentUnits',
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patterntransform: 'patternTransform',
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patternunits: 'patternUnits',
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pointsatx: 'pointsAtX',
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pointsaty: 'pointsAtY',
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pointsatz: 'pointsAtZ',
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preservealpha: 'preserveAlpha',
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preserveaspectratio: 'preserveAspectRatio',
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primitiveunits: 'primitiveUnits',
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refx: 'refX',
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refy: 'refY',
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repeatcount: 'repeatCount',
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repeatdur: 'repeatDur',
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requiredextensions: 'requiredExtensions',
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requiredfeatures: 'requiredFeatures',
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specularconstant: 'specularConstant',
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specularexponent: 'specularExponent',
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spreadmethod: 'spreadMethod',
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startoffset: 'startOffset',
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stddeviation: 'stdDeviation',
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stitchtiles: 'stitchTiles',
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surfacescale: 'surfaceScale',
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systemlanguage: 'systemLanguage',
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tablevalues: 'tableValues',
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targetx: 'targetX',
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targety: 'targetY',
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textlength: 'textLength',
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viewbox: 'viewBox',
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viewtarget: 'viewTarget',
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xchannelselector: 'xChannelSelector',
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ychannelselector: 'yChannelSelector',
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zoomandpan: 'zoomAndPan'
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};
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const XML_ATTRS_ADJUSTMENT_MAP = {
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'xlink:actuate': { prefix: 'xlink', name: 'actuate', namespace: NS.XLINK },
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'xlink:arcrole': { prefix: 'xlink', name: 'arcrole', namespace: NS.XLINK },
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'xlink:href': { prefix: 'xlink', name: 'href', namespace: NS.XLINK },
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'xlink:role': { prefix: 'xlink', name: 'role', namespace: NS.XLINK },
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'xlink:show': { prefix: 'xlink', name: 'show', namespace: NS.XLINK },
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'xlink:title': { prefix: 'xlink', name: 'title', namespace: NS.XLINK },
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'xlink:type': { prefix: 'xlink', name: 'type', namespace: NS.XLINK },
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'xml:base': { prefix: 'xml', name: 'base', namespace: NS.XML },
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'xml:lang': { prefix: 'xml', name: 'lang', namespace: NS.XML },
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'xml:space': { prefix: 'xml', name: 'space', namespace: NS.XML },
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xmlns: { prefix: '', name: 'xmlns', namespace: NS.XMLNS },
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'xmlns:xlink': { prefix: 'xmlns', name: 'xlink', namespace: NS.XMLNS }
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};
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//SVG tag names adjustment map
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const SVG_TAG_NAMES_ADJUSTMENT_MAP = (exports.SVG_TAG_NAMES_ADJUSTMENT_MAP = {
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altglyph: 'altGlyph',
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altglyphdef: 'altGlyphDef',
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altglyphitem: 'altGlyphItem',
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animatecolor: 'animateColor',
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animatemotion: 'animateMotion',
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animatetransform: 'animateTransform',
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clippath: 'clipPath',
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feblend: 'feBlend',
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fecolormatrix: 'feColorMatrix',
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fecomponenttransfer: 'feComponentTransfer',
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fecomposite: 'feComposite',
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feconvolvematrix: 'feConvolveMatrix',
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fediffuselighting: 'feDiffuseLighting',
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fedisplacementmap: 'feDisplacementMap',
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fedistantlight: 'feDistantLight',
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feflood: 'feFlood',
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fefunca: 'feFuncA',
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fefuncb: 'feFuncB',
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fefuncg: 'feFuncG',
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fefuncr: 'feFuncR',
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fegaussianblur: 'feGaussianBlur',
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feimage: 'feImage',
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femerge: 'feMerge',
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femergenode: 'feMergeNode',
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femorphology: 'feMorphology',
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feoffset: 'feOffset',
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fepointlight: 'fePointLight',
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fespecularlighting: 'feSpecularLighting',
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fespotlight: 'feSpotLight',
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fetile: 'feTile',
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feturbulence: 'feTurbulence',
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foreignobject: 'foreignObject',
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glyphref: 'glyphRef',
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lineargradient: 'linearGradient',
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radialgradient: 'radialGradient',
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textpath: 'textPath'
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});
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//Tags that causes exit from foreign content
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const EXITS_FOREIGN_CONTENT = {
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[$.B]: true,
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[$.BIG]: true,
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[$.BLOCKQUOTE]: true,
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[$.BODY]: true,
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[$.BR]: true,
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[$.CENTER]: true,
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[$.CODE]: true,
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[$.DD]: true,
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[$.DIV]: true,
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[$.DL]: true,
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[$.DT]: true,
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[$.EM]: true,
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[$.EMBED]: true,
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[$.H1]: true,
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[$.H2]: true,
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[$.H3]: true,
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[$.H4]: true,
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[$.H5]: true,
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[$.H6]: true,
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[$.HEAD]: true,
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[$.HR]: true,
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[$.I]: true,
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[$.IMG]: true,
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[$.LI]: true,
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[$.LISTING]: true,
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[$.MENU]: true,
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[$.META]: true,
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[$.NOBR]: true,
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[$.OL]: true,
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[$.P]: true,
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[$.PRE]: true,
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[$.RUBY]: true,
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[$.S]: true,
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[$.SMALL]: true,
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[$.SPAN]: true,
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[$.STRONG]: true,
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[$.STRIKE]: true,
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[$.SUB]: true,
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[$.SUP]: true,
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[$.TABLE]: true,
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[$.TT]: true,
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[$.U]: true,
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[$.UL]: true,
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[$.VAR]: true
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};
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//Check exit from foreign content
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exports.causesExit = function(startTagToken) {
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const tn = startTagToken.tagName;
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const isFontWithAttrs =
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tn === $.FONT &&
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(Tokenizer.getTokenAttr(startTagToken, ATTRS.COLOR) !== null ||
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Tokenizer.getTokenAttr(startTagToken, ATTRS.SIZE) !== null ||
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Tokenizer.getTokenAttr(startTagToken, ATTRS.FACE) !== null);
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return isFontWithAttrs ? true : EXITS_FOREIGN_CONTENT[tn];
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};
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//Token adjustments
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exports.adjustTokenMathMLAttrs = function(token) {
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for (let i = 0; i < token.attrs.length; i++) {
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if (token.attrs[i].name === DEFINITION_URL_ATTR) {
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token.attrs[i].name = ADJUSTED_DEFINITION_URL_ATTR;
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break;
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}
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}
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};
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exports.adjustTokenSVGAttrs = function(token) {
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for (let i = 0; i < token.attrs.length; i++) {
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const adjustedAttrName = SVG_ATTRS_ADJUSTMENT_MAP[token.attrs[i].name];
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if (adjustedAttrName) {
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token.attrs[i].name = adjustedAttrName;
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}
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}
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};
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exports.adjustTokenXMLAttrs = function(token) {
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for (let i = 0; i < token.attrs.length; i++) {
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const adjustedAttrEntry = XML_ATTRS_ADJUSTMENT_MAP[token.attrs[i].name];
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if (adjustedAttrEntry) {
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token.attrs[i].prefix = adjustedAttrEntry.prefix;
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token.attrs[i].name = adjustedAttrEntry.name;
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token.attrs[i].namespace = adjustedAttrEntry.namespace;
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}
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}
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};
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exports.adjustTokenSVGTagName = function(token) {
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const adjustedTagName = SVG_TAG_NAMES_ADJUSTMENT_MAP[token.tagName];
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if (adjustedTagName) {
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token.tagName = adjustedTagName;
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}
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};
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//Integration points
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function isMathMLTextIntegrationPoint(tn, ns) {
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return ns === NS.MATHML && (tn === $.MI || tn === $.MO || tn === $.MN || tn === $.MS || tn === $.MTEXT);
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}
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function isHtmlIntegrationPoint(tn, ns, attrs) {
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if (ns === NS.MATHML && tn === $.ANNOTATION_XML) {
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for (let i = 0; i < attrs.length; i++) {
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if (attrs[i].name === ATTRS.ENCODING) {
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const value = attrs[i].value.toLowerCase();
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return value === MIME_TYPES.TEXT_HTML || value === MIME_TYPES.APPLICATION_XML;
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}
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}
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}
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return ns === NS.SVG && (tn === $.FOREIGN_OBJECT || tn === $.DESC || tn === $.TITLE);
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}
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exports.isIntegrationPoint = function(tn, ns, attrs, foreignNS) {
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if ((!foreignNS || foreignNS === NS.HTML) && isHtmlIntegrationPoint(tn, ns, attrs)) {
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return true;
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}
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if ((!foreignNS || foreignNS === NS.MATHML) && isMathMLTextIntegrationPoint(tn, ns)) {
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return true;
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}
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return false;
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};
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