257 lines
14 KiB
JavaScript
257 lines
14 KiB
JavaScript
/* eslint-disable no-var, eqeqeq */
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/* globals $, svgedit */
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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 () {
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'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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// 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 || attrName.indexOf('data-') === 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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// 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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