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- /**
- * Package: svgedit.sanitize
- *
- * Licensed under the Apache License, Version 2
- *
- * Copyright(c) 2010 Alexis Deveria
- * Copyright(c) 2010 Jeff Schiller
- */
- // Dependencies:
- // 1) browser.js
- // 2) svgutils.js
- var svgedit = svgedit || {};
- (function() {
- if (!svgedit.sanitize) {
- svgedit.sanitize = {};
- }
- // Namespace constants
- var svgns = "http://www.w3.org/2000/svg",
- xlinkns = "http://www.w3.org/1999/xlink",
- xmlns = "http://www.w3.org/XML/1998/namespace",
- xmlnsns = "http://www.w3.org/2000/xmlns/", // see http://www.w3.org/TR/REC-xml-names/#xmlReserved
- se_ns = "http://svg-edit.googlecode.com",
- htmlns = "http://www.w3.org/1999/xhtml",
- mathns = "http://www.w3.org/1998/Math/MathML";
- // map namespace URIs to prefixes
- var nsMap_ = {};
- nsMap_[xlinkns] = 'xlink';
- nsMap_[xmlns] = 'xml';
- nsMap_[xmlnsns] = 'xmlns';
- nsMap_[se_ns] = 'se';
- nsMap_[htmlns] = 'xhtml';
- nsMap_[mathns] = 'mathml';
- // map prefixes to namespace URIs
- var nsRevMap_ = {};
- $.each(nsMap_, function(key,value){
- nsRevMap_[value] = key;
- });
- // this defines which elements and attributes that we support
- var svgWhiteList_ = {
- // SVG Elements
- "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"],
- "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"],
- "clipPath": ["class", "clipPathUnits", "id"],
- "defs": [],
- "desc": [],
- "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"],
- "feGaussianBlur": ["class", "color-interpolation-filters", "id", "requiredFeatures", "stdDeviation"],
- "filter": ["class", "color-interpolation-filters", "filterRes", "filterUnits", "height", "id", "primitiveUnits", "requiredFeatures", "width", "x", "xlink:href", "y"],
- "foreignObject": ["class", "font-size", "height", "id", "opacity", "requiredFeatures", "style", "transform", "width", "x", "y"],
- "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"],
- "image": ["class", "clip-path", "clip-rule", "filter", "height", "id", "mask", "opacity", "requiredFeatures", "style", "systemLanguage", "transform", "width", "x", "xlink:href", "xlink:title", "y"],
- "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"],
- "linearGradient": ["class", "id", "gradientTransform", "gradientUnits", "requiredFeatures", "spreadMethod", "systemLanguage", "x1", "x2", "xlink:href", "y1", "y2"],
- "marker": ["id", "class", "markerHeight", "markerUnits", "markerWidth", "orient", "preserveAspectRatio", "refX", "refY", "systemLanguage", "viewBox"],
- "mask": ["class", "height", "id", "maskContentUnits", "maskUnits", "width", "x", "y"],
- "metadata": ["class", "id"],
- "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"],
- "pattern": ["class", "height", "id", "patternContentUnits", "patternTransform", "patternUnits", "requiredFeatures", "style", "systemLanguage", "viewBox", "width", "x", "xlink:href", "y"],
- "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"],
- "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"],
- "radialGradient": ["class", "cx", "cy", "fx", "fy", "gradientTransform", "gradientUnits", "id", "r", "requiredFeatures", "spreadMethod", "systemLanguage", "xlink:href"],
- "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"],
- "stop": ["class", "id", "offset", "requiredFeatures", "stop-color", "stop-opacity", "style", "systemLanguage"],
- "svg": ["class", "clip-path", "clip-rule", "filter", "id", "height", "mask", "preserveAspectRatio", "requiredFeatures", "style", "systemLanguage", "viewBox", "width", "x", "xmlns", "xmlns:se", "xmlns:xlink", "y"],
- "switch": ["class", "id", "requiredFeatures", "systemLanguage"],
- "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"],
- "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"],
- "textPath": ["class", "id", "method", "requiredFeatures", "spacing", "startOffset", "style", "systemLanguage", "transform", "xlink:href"],
- "title": [],
- "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"],
- "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"],
-
- // MathML Elements
- "annotation": ["encoding"],
- "annotation-xml": ["encoding"],
- "maction": ["actiontype", "other", "selection"],
- "math": ["class", "id", "display", "xmlns"],
- "menclose": ["notation"],
- "merror": [],
- "mfrac": ["linethickness"],
- "mi": ["mathvariant"],
- "mmultiscripts": [],
- "mn": [],
- "mo": ["fence", "lspace", "maxsize", "minsize", "rspace", "stretchy"],
- "mover": [],
- "mpadded": ["lspace", "width", "height", "depth", "voffset"],
- "mphantom": [],
- "mprescripts": [],
- "mroot": [],
- "mrow": ["xlink:href", "xlink:type", "xmlns:xlink"],
- "mspace": ["depth", "height", "width"],
- "msqrt": [],
- "mstyle": ["displaystyle", "mathbackground", "mathcolor", "mathvariant", "scriptlevel"],
- "msub": [],
- "msubsup": [],
- "msup": [],
- "mtable": ["align", "columnalign", "columnlines", "columnspacing", "displaystyle", "equalcolumns", "equalrows", "frame", "rowalign", "rowlines", "rowspacing", "width"],
- "mtd": ["columnalign", "columnspan", "rowalign", "rowspan"],
- "mtext": [],
- "mtr": ["columnalign", "rowalign"],
- "munder": [],
- "munderover": [],
- "none": [],
- "semantics": []
- };
- // Produce a Namespace-aware version of svgWhitelist
- var svgWhiteListNS_ = {};
- $.each(svgWhiteList_, function(elt,atts){
- var attNS = {};
- $.each(atts, function(i, att){
- if (att.indexOf(':') >= 0) {
- var v = att.split(':');
- attNS[v[1]] = nsRevMap_[v[0]];
- } else {
- attNS[att] = att == 'xmlns' ? xmlnsns : null;
- }
- });
- svgWhiteListNS_[elt] = attNS;
- });
- // temporarily expose these
- svgedit.sanitize.getNSMap = function() { return nsMap_; }
- // Function: svgedit.sanitize.sanitizeSvg
- // Sanitizes the input node and its children
- // It only keeps what is allowed from our whitelist defined above
- //
- // Parameters:
- // node - The DOM element to be checked, will also check its children
- svgedit.sanitize.sanitizeSvg = function(node) {
- // we only care about element nodes
- // automatically return for all comment, etc nodes
- // for text, we do a whitespace trim
- if (node.nodeType == 3) {
- node.nodeValue = node.nodeValue.replace(/^\s+|\s+$/g, "");
- // Remove empty text nodes
- if(!node.nodeValue.length) node.parentNode.removeChild(node);
- }
- if (node.nodeType != 1) return;
- var doc = node.ownerDocument;
- var parent = node.parentNode;
- // can parent ever be null here? I think the root node's parent is the document...
- if (!doc || !parent) return;
-
- var allowedAttrs = svgWhiteList_[node.nodeName];
- var allowedAttrsNS = svgWhiteListNS_[node.nodeName];
- // if this element is allowed
- if (allowedAttrs != undefined) {
- var se_attrs = [];
-
- var i = node.attributes.length;
- while (i--) {
- // if the attribute is not in our whitelist, then remove it
- // could use jQuery's inArray(), but I don't know if that's any better
- var attr = node.attributes.item(i);
- var attrName = attr.nodeName;
- var attrLocalName = attr.localName;
- var attrNsURI = attr.namespaceURI;
- // Check that an attribute with the correct localName in the correct namespace is on
- // our whitelist or is a namespace declaration for one of our allowed namespaces
- if (!(allowedAttrsNS.hasOwnProperty(attrLocalName) && attrNsURI == allowedAttrsNS[attrLocalName] && attrNsURI != xmlnsns) &&
- !(attrNsURI == xmlnsns && nsMap_[attr.nodeValue]) )
- {
- // TODO(codedread): Programmatically add the se: attributes to the NS-aware whitelist.
- // Bypassing the whitelist to allow se: prefixes. Is there
- // a more appropriate way to do this?
- if(attrName.indexOf('se:') == 0) {
- se_attrs.push([attrName, attr.nodeValue]);
- }
- node.removeAttributeNS(attrNsURI, attrLocalName);
- }
-
- // Add spaces before negative signs where necessary
- if(svgedit.browser.isGecko()) {
- switch ( attrName ) {
- case "transform":
- case "gradientTransform":
- case "patternTransform":
- var val = attr.nodeValue.replace(/(\d)-/g, "$1 -");
- node.setAttribute(attrName, val);
- }
- }
-
- // for the style attribute, rewrite it in terms of XML presentational attributes
- if (attrName == "style") {
- var props = attr.nodeValue.split(";"),
- p = props.length;
- while(p--) {
- var nv = props[p].split(":");
- // now check that this attribute is supported
- if (allowedAttrs.indexOf(nv[0]) >= 0) {
- node.setAttribute(nv[0],nv[1]);
- }
- }
- node.removeAttribute('style');
- }
- }
-
- $.each(se_attrs, function(i, attr) {
- node.setAttributeNS(se_ns, attr[0], attr[1]);
- });
-
- // for some elements that have a xlink:href, ensure the URI refers to a local element
- // (but not for links)
- var href = svgedit.utilities.getHref(node);
- if(href &&
- ["filter", "linearGradient", "pattern",
- "radialGradient", "textPath", "use"].indexOf(node.nodeName) >= 0)
- {
- // TODO: we simply check if the first character is a #, is this bullet-proof?
- if (href[0] != "#") {
- // remove the attribute (but keep the element)
- svgedit.utilities.setHref(node, "");
- node.removeAttributeNS(xlinkns, "href");
- }
- }
-
- // Safari crashes on a <use> without a xlink:href, so we just remove the node here
- if (node.nodeName == "use" && !svgedit.utilities.getHref(node)) {
- parent.removeChild(node);
- return;
- }
- // if the element has attributes pointing to a non-local reference,
- // need to remove the attribute
- $.each(["clip-path", "fill", "filter", "marker-end", "marker-mid", "marker-start", "mask", "stroke"],function(i,attr) {
- var val = node.getAttribute(attr);
- if (val) {
- val = svgedit.utilities.getUrlFromAttr(val);
- // simply check for first character being a '#'
- if (val && val[0] !== "#") {
- node.setAttribute(attr, "");
- node.removeAttribute(attr);
- }
- }
- });
-
- // recurse to children
- i = node.childNodes.length;
- while (i--) { svgedit.sanitize.sanitizeSvg(node.childNodes.item(i)); }
- }
- // else, remove this element
- else {
- // remove all children from this node and insert them before this node
- // FIXME: in the case of animation elements this will hardly ever be correct
- var children = [];
- while (node.hasChildNodes()) {
- children.push(parent.insertBefore(node.firstChild, node));
- }
- // remove this node from the document altogether
- parent.removeChild(node);
- // call sanitizeSvg on each of those children
- var i = children.length;
- while (i--) { svgedit.sanitize.sanitizeSvg(children[i]); }
- }
- };
- })();
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