Make VisualSelector show first available multiple selector, refactor to make more maintainable (#1132)
dgtlmoon
2 years ago
committed by
GitHub
parent
ab28f20eba
commit
df6e835035
@ -0,0 +1,154 @@
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// Include the getXpath script directly, easier than fetching
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!function (e, n) {
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"object" == typeof exports && "undefined" != typeof module ? module.exports = n() : "function" == typeof define && define.amd ? define(n) : (e = e || self).getXPath = n()
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}(this, function () {
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return function (e) {
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var n = e;
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if (n && n.id) return '//*[@id="' + n.id + '"]';
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for (var o = []; n && Node.ELEMENT_NODE === n.nodeType;) {
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for (var i = 0, r = !1, d = n.previousSibling; d;) d.nodeType !== Node.DOCUMENT_TYPE_NODE && d.nodeName === n.nodeName && i++, d = d.previousSibling;
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for (d = n.nextSibling; d;) {
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if (d.nodeName === n.nodeName) {
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r = !0;
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break
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}
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d = d.nextSibling
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}
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o.push((n.prefix ? n.prefix + ":" : "") + n.localName + (i || r ? "[" + (i + 1) + "]" : "")), n = n.parentNode
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}
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return o.length ? "/" + o.reverse().join("/") : ""
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}
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});
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const findUpTag = (el) => {
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let r = el
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chained_css = [];
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depth = 0;
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// Strategy 1: Keep going up until we hit an ID tag, imagine it's like #list-widget div h4
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while (r.parentNode) {
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if (depth == 5) {
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break;
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}
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if ('' !== r.id) {
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chained_css.unshift("#" + CSS.escape(r.id));
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final_selector = chained_css.join(' > ');
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// Be sure theres only one, some sites have multiples of the same ID tag :-(
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if (window.document.querySelectorAll(final_selector).length == 1) {
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return final_selector;
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}
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return null;
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} else {
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chained_css.unshift(r.tagName.toLowerCase());
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}
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r = r.parentNode;
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depth += 1;
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}
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return null;
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}
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// @todo - if it's SVG or IMG, go into image diff mode
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var elements = window.document.querySelectorAll("div,span,form,table,tbody,tr,td,a,p,ul,li,h1,h2,h3,h4, header, footer, section, article, aside, details, main, nav, section, summary");
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var size_pos = [];
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// after page fetch, inject this JS
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// build a map of all elements and their positions (maybe that only include text?)
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var bbox;
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for (var i = 0; i < elements.length; i++) {
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bbox = elements[i].getBoundingClientRect();
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// forget really small ones
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if (bbox['width'] < 15 && bbox['height'] < 15) {
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continue;
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}
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// @todo the getXpath kind of sucks, it doesnt know when there is for example just one ID sometimes
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// it should not traverse when we know we can anchor off just an ID one level up etc..
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// maybe, get current class or id, keep traversing up looking for only class or id until there is just one match
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// 1st primitive - if it has class, try joining it all and select, if theres only one.. well thats us.
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xpath_result = false;
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try {
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var d = findUpTag(elements[i]);
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if (d) {
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xpath_result = d;
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}
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} catch (e) {
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console.log(e);
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}
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// You could swap it and default to getXpath and then try the smarter one
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// default back to the less intelligent one
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if (!xpath_result) {
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try {
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// I've seen on FB and eBay that this doesnt work
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// ReferenceError: getXPath is not defined at eval (eval at evaluate (:152:29), <anonymous>:67:20) at UtilityScript.evaluate (<anonymous>:159:18) at UtilityScript.<anonymous> (<anonymous>:1:44)
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xpath_result = getXPath(elements[i]);
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} catch (e) {
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console.log(e);
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continue;
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}
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}
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if (window.getComputedStyle(elements[i]).visibility === "hidden") {
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continue;
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}
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size_pos.push({
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xpath: xpath_result,
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width: Math.round(bbox['width']),
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height: Math.round(bbox['height']),
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left: Math.floor(bbox['left']),
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top: Math.floor(bbox['top'])
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});
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}
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// Inject the current one set in the include_filters, which may be a CSS rule
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// used for displaying the current one in VisualSelector, where its not one we generated.
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if (include_filters.length) {
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// Foreach filter, go and find it on the page and add it to the results so we can visualise it again
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for (const f of include_filters) {
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bbox = false;
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q = false;
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if (!f.length) {
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console.log("xpath_element_scraper: Empty filter, skipping");
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continue;
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}
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try {
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// is it xpath?
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if (f.startsWith('/') || f.startsWith('xpath:')) {
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q = document.evaluate(f.replace('xpath:', ''), document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
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} else {
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q = document.querySelector(f);
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}
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} catch (e) {
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// Maybe catch DOMException and alert?
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console.log("xpath_element_scraper: Exception selecting element from filter "+f);
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console.log(e);
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}
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if (q) {
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bbox = q.getBoundingClientRect();
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} else {
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console.log("xpath_element_scraper: filter element "+f+" was not found");
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}
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if (bbox && bbox['width'] > 0 && bbox['height'] > 0) {
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size_pos.push({
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xpath: f,
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width: Math.round(bbox['width']),
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height: Math.round(bbox['height']),
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left: Math.floor(bbox['left']),
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top: Math.floor(bbox['top'])
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});
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}
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}
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}
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// Window.width required for proper scaling in the frontend
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return {'size_pos': size_pos, 'browser_width': window.innerWidth};
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