260 lines
14 KiB
JavaScript
260 lines
14 KiB
JavaScript
/*globals $, svgedit*/
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/*jslint vars: true, eqeq: true*/
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/**
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* Package: svgedit.sanitize
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*
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* Licensed under the MIT License
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*
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* Copyright(c) 2010 Alexis Deveria
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* Copyright(c) 2010 Jeff Schiller
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*/
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// Dependencies:
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// 1) jQuery
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// 2) pathseg.js
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// 3) browser.js
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// 4) svgutils.js
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(function() {'use strict';
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if (!svgedit.sanitize) {
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svgedit.sanitize = {};
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}
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var NS = svgedit.NS,
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REVERSE_NS = svgedit.getReverseNS();
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// this defines which elements and attributes that we support
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var svgWhiteList_ = {
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// SVG Elements
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"a": ["class", "clip-path", "clip-rule", "fill", "fill-opacity", "fill-rule", "filter", "id", "mask", "opacity", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform", "xlink:href", "xlink:title"],
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"circle": ["class", "clip-path", "clip-rule", "cx", "cy", "fill", "fill-opacity", "fill-rule", "filter", "id", "mask", "opacity", "r", "requiredFeatures", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform"],
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"clipPath": ["class", "clipPathUnits", "id"],
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"defs": [],
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"style" : ["type"],
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"desc": [],
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"ellipse": ["class", "clip-path", "clip-rule", "cx", "cy", "fill", "fill-opacity", "fill-rule", "filter", "id", "mask", "opacity", "requiredFeatures", "rx", "ry", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform"],
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"feGaussianBlur": ["class", "color-interpolation-filters", "id", "requiredFeatures", "stdDeviation"],
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"filter": ["class", "color-interpolation-filters", "filterRes", "filterUnits", "height", "id", "primitiveUnits", "requiredFeatures", "width", "x", "xlink:href", "y"],
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"foreignObject": ["class", "font-size", "height", "id", "opacity", "requiredFeatures", "style", "transform", "width", "x", "y"],
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"g": ["class", "clip-path", "clip-rule", "id", "display", "fill", "fill-opacity", "fill-rule", "filter", "mask", "opacity", "requiredFeatures", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform", "font-family", "font-size", "font-style", "font-weight", "text-anchor"],
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"image": ["class", "clip-path", "clip-rule", "filter", "height", "id", "mask", "opacity", "requiredFeatures", "style", "systemLanguage", "transform", "width", "x", "xlink:href", "xlink:title", "y"],
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"line": ["class", "clip-path", "clip-rule", "fill", "fill-opacity", "fill-rule", "filter", "id", "marker-end", "marker-mid", "marker-start", "mask", "opacity", "requiredFeatures", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform", "x1", "x2", "y1", "y2"],
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"linearGradient": ["class", "id", "gradientTransform", "gradientUnits", "requiredFeatures", "spreadMethod", "systemLanguage", "x1", "x2", "xlink:href", "y1", "y2"],
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"marker": ["id", "class", "markerHeight", "markerUnits", "markerWidth", "orient", "preserveAspectRatio", "refX", "refY", "systemLanguage", "viewBox"],
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"mask": ["class", "height", "id", "maskContentUnits", "maskUnits", "width", "x", "y"],
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"metadata": ["class", "id"],
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"path": ["class", "clip-path", "clip-rule", "d", "fill", "fill-opacity", "fill-rule", "filter", "id", "marker-end", "marker-mid", "marker-start", "mask", "opacity", "requiredFeatures", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform"],
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"pattern": ["class", "height", "id", "patternContentUnits", "patternTransform", "patternUnits", "requiredFeatures", "style", "systemLanguage", "viewBox", "width", "x", "xlink:href", "y"],
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"polygon": ["class", "clip-path", "clip-rule", "id", "fill", "fill-opacity", "fill-rule", "filter", "id", "class", "marker-end", "marker-mid", "marker-start", "mask", "opacity", "points", "requiredFeatures", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform"],
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"polyline": ["class", "clip-path", "clip-rule", "id", "fill", "fill-opacity", "fill-rule", "filter", "marker-end", "marker-mid", "marker-start", "mask", "opacity", "points", "requiredFeatures", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform"],
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"radialGradient": ["class", "cx", "cy", "fx", "fy", "gradientTransform", "gradientUnits", "id", "r", "requiredFeatures", "spreadMethod", "systemLanguage", "xlink:href"],
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"rect": ["class", "clip-path", "clip-rule", "fill", "fill-opacity", "fill-rule", "filter", "height", "id", "mask", "opacity", "requiredFeatures", "rx", "ry", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform", "width", "x", "y"],
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"stop": ["class", "id", "offset", "requiredFeatures", "stop-color", "stop-opacity", "style", "systemLanguage"],
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"svg": ["class", "clip-path", "clip-rule", "filter", "id", "height", "mask", "preserveAspectRatio", "requiredFeatures", "style", "systemLanguage", "viewBox", "width", "x", "xmlns", "xmlns:se", "xmlns:xlink", "y"],
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"switch": ["class", "id", "requiredFeatures", "systemLanguage"],
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"symbol": ["class", "fill", "fill-opacity", "fill-rule", "filter", "font-family", "font-size", "font-style", "font-weight", "id", "opacity", "preserveAspectRatio", "requiredFeatures", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "transform", "viewBox"],
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"text": ["class", "clip-path", "clip-rule", "fill", "fill-opacity", "fill-rule", "filter", "font-family", "font-size", "font-style", "font-weight", "id", "mask", "opacity", "requiredFeatures", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "text-anchor", "transform", "x", "xml:space", "y"],
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"textPath": ["class", "id", "method", "requiredFeatures", "spacing", "startOffset", "style", "systemLanguage", "transform", "xlink:href"],
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"title": [],
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"tspan": ["class", "clip-path", "clip-rule", "dx", "dy", "fill", "fill-opacity", "fill-rule", "filter", "font-family", "font-size", "font-style", "font-weight", "id", "mask", "opacity", "requiredFeatures", "rotate", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "systemLanguage", "text-anchor", "textLength", "transform", "x", "xml:space", "y"],
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"use": ["class", "clip-path", "clip-rule", "fill", "fill-opacity", "fill-rule", "filter", "height", "id", "mask", "stroke", "stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin", "stroke-miterlimit", "stroke-opacity", "stroke-width", "style", "transform", "width", "x", "xlink:href", "y"],
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// MathML Elements
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"annotation": ["encoding"],
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"annotation-xml": ["encoding"],
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"maction": ["actiontype", "other", "selection"],
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"math": ["class", "id", "display", "xmlns"],
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"menclose": ["notation"],
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"merror": [],
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"mfrac": ["linethickness"],
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"mi": ["mathvariant"],
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"mmultiscripts": [],
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"mn": [],
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"mo": ["fence", "lspace", "maxsize", "minsize", "rspace", "stretchy"],
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"mover": [],
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"mpadded": ["lspace", "width", "height", "depth", "voffset"],
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"mphantom": [],
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"mprescripts": [],
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"mroot": [],
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"mrow": ["xlink:href", "xlink:type", "xmlns:xlink"],
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"mspace": ["depth", "height", "width"],
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"msqrt": [],
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"mstyle": ["displaystyle", "mathbackground", "mathcolor", "mathvariant", "scriptlevel"],
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"msub": [],
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"msubsup": [],
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"msup": [],
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"mtable": ["align", "columnalign", "columnlines", "columnspacing", "displaystyle", "equalcolumns", "equalrows", "frame", "rowalign", "rowlines", "rowspacing", "width"],
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"mtd": ["columnalign", "columnspan", "rowalign", "rowspan"],
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"mtext": [],
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"mtr": ["columnalign", "rowalign"],
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"munder": [],
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"munderover": [],
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"none": [],
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"semantics": []
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};
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// Produce a Namespace-aware version of svgWhitelist
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var svgWhiteListNS_ = {};
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$.each(svgWhiteList_, function(elt, atts){
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var attNS = {};
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$.each(atts, function(i, att){
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if (att.indexOf(':') >= 0) {
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var v = att.split(':');
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attNS[v[1]] = NS[(v[0]).toUpperCase()];
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} else {
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attNS[att] = att == 'xmlns' ? NS.XMLNS : null;
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}
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});
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svgWhiteListNS_[elt] = attNS;
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});
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// Function: svgedit.sanitize.sanitizeSvg
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// Sanitizes the input node and its children
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// It only keeps what is allowed from our whitelist defined above
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//
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// Parameters:
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// node - The DOM element to be checked (we'll also check its children)
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svgedit.sanitize.sanitizeSvg = function(node) {
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// Cleanup text nodes
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if (node.nodeType == 3) { // 3 == TEXT_NODE
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// Trim whitespace
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node.nodeValue = node.nodeValue.replace(/^\s+|\s+$/g, '');
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// Remove if empty
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if (node.nodeValue.length === 0) {
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node.parentNode.removeChild(node);
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}
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}
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// We only care about element nodes.
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// Automatically return for all non-element nodes, such as comments, etc.
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if (node.nodeType != 1) { // 1 == ELEMENT_NODE
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return;
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}
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var doc = node.ownerDocument;
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var parent = node.parentNode;
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// can parent ever be null here? I think the root node's parent is the document...
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if (!doc || !parent) {
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return;
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}
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var allowedAttrs = svgWhiteList_[node.nodeName];
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var allowedAttrsNS = svgWhiteListNS_[node.nodeName];
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var i;
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// if this element is supported, sanitize it
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if (typeof allowedAttrs !== 'undefined') {
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var seAttrs = [];
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i = node.attributes.length;
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while (i--) {
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// if the attribute is not in our whitelist, then remove it
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// could use jQuery's inArray(), but I don't know if that's any better
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var attr = node.attributes.item(i);
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var attrName = attr.nodeName;
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var attrLocalName = attr.localName;
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var attrNsURI = attr.namespaceURI;
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// Check that an attribute with the correct localName in the correct namespace is on
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// our whitelist or is a namespace declaration for one of our allowed namespaces
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if (!(allowedAttrsNS.hasOwnProperty(attrLocalName) && attrNsURI == allowedAttrsNS[attrLocalName] && attrNsURI != NS.XMLNS) &&
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!(attrNsURI == NS.XMLNS && REVERSE_NS[attr.value]) )
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{
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// TODO(codedread): Programmatically add the se: attributes to the NS-aware whitelist.
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// Bypassing the whitelist to allow se: prefixes.
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// Is there a more appropriate way to do this?
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if (attrName.indexOf('se:') === 0) {
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seAttrs.push([attrName, attr.value]);
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}
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node.removeAttributeNS(attrNsURI, attrLocalName);
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}
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// Add spaces before negative signs where necessary
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if (svgedit.browser.isGecko()) {
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switch (attrName) {
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case 'transform':
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case 'gradientTransform':
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case 'patternTransform':
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var val = attr.value.replace(/(\d)-/g, '$1 -');
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node.setAttribute(attrName, val);
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break;
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}
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}
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// For the style attribute, rewrite it in terms of XML presentational attributes
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if (attrName == 'style') {
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var props = attr.value.split(';'),
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p = props.length;
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while (p--) {
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var nv = props[p].split(':');
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var styleAttrName = $.trim(nv[0]);
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var styleAttrVal = $.trim(nv[1]);
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// Now check that this attribute is supported
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if (allowedAttrs.indexOf(styleAttrName) >= 0) {
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node.setAttribute(styleAttrName, styleAttrVal);
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}
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}
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node.removeAttribute('style');
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}
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}
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$.each(seAttrs, function(i, attr) {
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node.setAttributeNS(NS.SE, attr[0], attr[1]);
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});
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// for some elements that have a xlink:href, ensure the URI refers to a local element
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// (but not for links)
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var href = svgedit.utilities.getHref(node);
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if (href &&
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['filter', 'linearGradient', 'pattern',
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'radialGradient', 'textPath', 'use'].indexOf(node.nodeName) >= 0) {
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// TODO: we simply check if the first character is a #, is this bullet-proof?
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if (href[0] != '#') {
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// remove the attribute (but keep the element)
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svgedit.utilities.setHref(node, '');
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node.removeAttributeNS(NS.XLINK, 'href');
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}
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}
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// Safari crashes on a <use> without a xlink:href, so we just remove the node here
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if (node.nodeName == 'use' && !svgedit.utilities.getHref(node)) {
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parent.removeChild(node);
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return;
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}
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// if the element has attributes pointing to a non-local reference,
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// need to remove the attribute
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$.each(['clip-path', 'fill', 'filter', 'marker-end', 'marker-mid', 'marker-start', 'mask', 'stroke'], function(i, attr) {
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var val = node.getAttribute(attr);
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if (val) {
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val = svgedit.utilities.getUrlFromAttr(val);
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// simply check for first character being a '#'
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if (val && val[0] !== '#') {
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node.setAttribute(attr, '');
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node.removeAttribute(attr);
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}
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}
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});
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// recurse to children
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i = node.childNodes.length;
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while (i--) { svgedit.sanitize.sanitizeSvg(node.childNodes.item(i)); }
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}
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// else (element not supported), remove it
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else {
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// remove all children from this node and insert them before this node
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// FIXME: in the case of animation elements this will hardly ever be correct
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var children = [];
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while (node.hasChildNodes()) {
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children.push(parent.insertBefore(node.firstChild, node));
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}
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// remove this node from the document altogether
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parent.removeChild(node);
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// call sanitizeSvg on each of those children
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i = children.length;
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while (i--) { svgedit.sanitize.sanitizeSvg(children[i]); }
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}
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};
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}());
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