1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
(function(){
var objOverlay = document.createElement("div");
var objinnerDiv = document.createElement("div");
objOverlay.id = "readOverlay";
objinnerDiv.id = "readInner";
// Apply user-selected styling:
document.body.className = readStyle;
objOverlay.className = readStyle;
objinnerDiv.className = readMargin + " " + readSize;
objinnerDiv.appendChild(grabArticle()); // Get the article and place it inside the inner Div
objOverlay.appendChild(objinnerDiv); // Insert the inner div into the overlay
// This removes everything else on the page. Requires a page refresh to undo it.
// I tried the damn overlay on top - but had rendering issues:
document.body.innerHTML = "";
// Inserts the new content :
document.body.insertBefore(objOverlay, document.body.firstChild);
})()
function grabArticle() {
var allParagraphs = document.getElementsByTagName("p");
var topDivCount = 0;
var topDiv;
var topDivParas;
var articleContent = document.createElement("DIV");
var articleTitle = document.createElement("H1");
var articleFooter = document.createElement("DIV");
// Replace all doubled-up <BR> tags with <P> tags :
var pattern = new RegExp ("<br/?>[ \r\n\s]*<br/?>", "g");
document.body.innerHTML = document.body.innerHTML.replace(pattern, "</p><p>");
// Grab the title from the <title> tag and inject it as the title.
articleTitle.innerHTML = document.title;
articleContent.appendChild(articleTitle);
// Study all the paragraphs and find the chunk that has the most <p>'s and keep it:
for (var j=0; j < allParagraphs.length; j++) {
var tempParas = allParagraphs[j].parentNode.getElementsByTagName("p");
if ( tempParas.length > topDivCount && getCharCount(allParagraphs[j].parentNode) >= tempParas.length ) {
topDivCount = tempParas.length;
topDiv = allParagraphs[j].parentNode;
}
}
// REMOVES ALL STYLESHEETS ...
for (var k=0;k < document.styleSheets.length; k++) {
if (document.styleSheets[k].href != null && document.styleSheets[k].href.lastIndexOf("arc90.com/experiments/readability") == -1) {
document.styleSheets[k].disabled = true;
}
}
// Remove all style tags in head (not doing this on IE) :
var styleTags = document.getElementsByTagName("style");
for (var j=0;j < styleTags.length; j++) {
if (navigator.appName != "Microsoft Internet Explorer") {
styleTags[j].textContent = "";
}
}
cleanStyles(topDiv); // Removes all style attributes
topDiv = killDivs(topDiv); // Goes in and removes DIV's that have more non <p> stuff than <p> stuff
// Cleans out junk from the topDiv just in case:
topDiv = clean(topDiv, "form");
topDiv = clean(topDiv, "object");
topDiv = clean(topDiv, "table");
topDiv = clean(topDiv, "h1");
topDiv = clean(topDiv, "h2");
topDiv = clean(topDiv, "iframe");
// Add the footer and contents:
articleFooter.id = "readFooter";
articleFooter.innerHTML = "<a href='http://www.arc90.com'><img src='http://lab.arc90.com/experiments/readability/images/footer.png'></a>";
articleContent.appendChild(topDiv);
articleContent.appendChild(articleFooter);
return articleContent;
}
// Get character count
function getCharCount ( e,s ) {
s = s || ",";
if (navigator.appName == "Microsoft Internet Explorer") {
return parentContent = e.innerText.split(',').length;
}
else {
return parentContent = e.textContent.split(',').length;
}
}
function cleanStyles( e ) {
e = e || document;
var cur = e.firstChild;
// Go until there are no more child nodes
while ( cur != null ) {
if ( cur.nodeType == 1 ) {
// Remove style attribute(s) :
cur.removeAttribute("style");
cleanStyles( cur );
}
cur = cur.nextSibling;
}
}
function killDivs ( e ) {
var divsList = e.getElementsByTagName( "div" );
var curDivLength = divsList.length;
// Gather counts for other typical elements embedded within :
for (var i=0; i < curDivLength; i ++) {
var p = divsList[i].getElementsByTagName("p").length;
var img = divsList[i].getElementsByTagName("img").length;
var li = divsList[i].getElementsByTagName("li").length;
var a = divsList[i].getElementsByTagName("a").length;
var embed = divsList[i].getElementsByTagName("embed").length;
// If the number of commas is less than 10 (bad sign) ...
if ( getCharCount(divsList[i]) < 10) {
// And the number of non-paragraph elements is more than paragraphs
// or other ominous signs :
if ( img > p || li > p || a > p || p == 0 || embed > 0) {
divsList[i].style.display = "none";
}
}
}
return e;
}
function clean(e, tags, minWords) {
var targetList = e.getElementsByTagName( tags );
minWords = minWords || 1000000;
for (var y=0; y < targetList.length; y++) {
// If the text content isn't laden with words, remove the child:
if (getCharCount(targetList[y], " ") < minWords) {
targetList[y].parentNode.removeChild(targetList[y]);
}
}
return e;
}
|
