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