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| 1 return (function() { |
| 2 function hasOGArticle() { |
| 3 var elems = document.head.querySelectorAll( |
| 4 'meta[property="og:type"],meta[name="og:type"]'); |
| 5 for (var i in elems) { |
| 6 if (elems[i].content && elems[i].content.toUpperCase() == 'ARTICLE') { |
| 7 return true; |
| 8 } |
| 9 } |
| 10 return false; |
| 11 } |
| 12 |
| 13 function isVisible(e) { |
| 14 var bounds = e.getBoundingClientRect() |
| 15 var style = window.getComputedStyle(e); |
| 16 return !( |
| 17 bounds.height == 0 || bounds.width == 0 || |
| 18 style.display == "none" || |
| 19 style.visibility == "hidden" || |
| 20 style.opacity == 0 |
| 21 ) |
| 22 } |
| 23 |
| 24 function countVisible(nodes) { |
| 25 var count = 0; |
| 26 for (var i = 0; i < nodes.length; i++) { |
| 27 var node = nodes[i]; |
| 28 if (!isVisible(node)) { |
| 29 continue; |
| 30 } |
| 31 count++; |
| 32 } |
| 33 return count; |
| 34 } |
| 35 |
| 36 var unlikelyCandidates = /banner|combx|comment|community|disqus|extra|foot|hea
der|menu|related|remark|rss|share|shoutbox|sidebar|skyscraper|sponsor|ad-break|a
gegate|pagination|pager|popup/i; |
| 37 var okMaybeItsACandidate = /and|article|body|column|main|shadow/i; |
| 38 |
| 39 function mozScore() { |
| 40 return _mozScore(true, 0.5, 140, true, 1e100); |
| 41 } |
| 42 |
| 43 function _mozScore(trim, power, cut, excludeLi, saturate) { |
| 44 var score = 0; |
| 45 |
| 46 var nodes = document.querySelectorAll('p,pre') |
| 47 for (var i = 0; i < nodes.length; i++) { |
| 48 var node = nodes[i]; |
| 49 if (!isVisible(node)) { |
| 50 continue; |
| 51 } |
| 52 var matchString = node.className + " " + node.id; |
| 53 if (unlikelyCandidates.test(matchString) && |
| 54 !okMaybeItsACandidate.test(matchString)) { |
| 55 continue; |
| 56 } |
| 57 |
| 58 if (excludeLi && node.matches && node.matches("li p")) { |
| 59 continue; |
| 60 } |
| 61 |
| 62 var textContent = node.textContent; |
| 63 if (trim) textContent = textContent.trim(); |
| 64 var textContentLength = textContent.length; |
| 65 textContentLength = Math.min(saturate, textContentLength) |
| 66 if (textContentLength < cut) { |
| 67 continue; |
| 68 } |
| 69 |
| 70 score += Math.pow(textContentLength - cut, power); |
| 71 } |
| 72 return score; |
| 73 } |
| 74 |
| 75 var body = document.body; |
| 76 return { |
| 77 'opengraph': hasOGArticle(), |
| 78 'url': document.location.href, |
| 79 'title': document.title, |
| 80 'numElements': body.querySelectorAll('*').length, |
| 81 'numAnchors': body.querySelectorAll('a').length, |
| 82 'numForms': body.querySelectorAll('form').length, |
| 83 'numTextInput': body.querySelectorAll('input[type="text"]').length, |
| 84 'numPasswordInput': body.querySelectorAll('input[type="password"]').length, |
| 85 'numPPRE': body.querySelectorAll('p,pre').length, |
| 86 'innerText': body.innerText, |
| 87 'textContent': body.textContent, |
| 88 'innerHTML': body.innerHTML, |
| 89 'mozScore': _mozScore(true, 0.5, 140, true, 1e100), |
| 90 'mozScoreAllSqrt': _mozScore(true, 0.5, 0, true, 1e100), |
| 91 'mozScoreAllLinear': _mozScore(true, 1, 0, true, 1e100), |
| 92 'mozScoreFast': _mozScore(false, 0.5, 140, true, 1000), |
| 93 'mozScoreFastAllSqrt': _mozScore(false, 0.5, 0, true, 1000), |
| 94 'mozScoreFastAllLinear': _mozScore(false, 1, 0, true, 1000), |
| 95 'visibleElements': countVisible(body.querySelectorAll('*')), |
| 96 'visiblePPRE': countVisible(body.querySelectorAll('p,pre')), |
| 97 } |
| 98 })() |
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