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docs.js
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docs.js
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//A document fetcher + parser. Uses JSDOM to build the page on the server side.
//This allows us to do things like build the structure of the webpage on the serverside
//The 'rendered' elements can then be scraped, full with their css.
var jsdom = require("jsdom");
exports.loadDocument = function(url, callback){
jsdom.env(url, ["http://code.jquery.com/jquery-1.5.min.js"],
function(errors, window){
if (errors){
console.log('there was an error fetching the page');
return callback("error");
}
//Change relative image paths to absolute image paths
window.$('img').each(function(index, element){
var absSource = getAbsolutePath(url, window.$(element).get(0).src);
window.$(element).attr('src', absSource);
});
//console.log(window.document.getElementsByTagName('img')[0].src);
//String all <a> of links so we can click on buttons etc.. w/o being redirected
window.$('a').each(function(index, element){
window.$(element).attr('href', "");
});
//Change relative stylesheet paths to absolute stylesheet paths
var stylesheets = "";
window.$('link').each(function(index, element){
var el = window.$(element);
if (el.attr('type') === "text/css"){
var absStyleSource = getAbsolutePath(url, el.attr('href'));
stylesheets += '<link href="' + absStyleSource + '" type="text/css" rel="stylesheet"/>';
}
});
stylesheets += "\n";
//Get all styles for every element and save them to a global <style> tag string
var style = "<style>\n";
//window.$('body').find('*').each(function(index, element){
// style += getCssStyle(window.$(element));
//});
style += "</style>\n";
//Get all html for every element and save it to an html string
var html = "";
window.$('script').remove();
html = window.$('body').html();
//window.$('body').children().each(function(index, element){
// html = recursiveHTMLAppendFunction(window, html, window.$(element));
//console.log(window.$(element).html() + "\n");
//});
var all = "<html><head>" + stylesheets + style + "</head><body>" + html + "</body></html>";
callback(null, all, html, stylesheets);
}
);
};
/* This function recursively iterates through all of an element's children to produce it's html */
recursiveHTMLAppendFunction = function(win, canvasHTML, element) {
var attributes = "";
var target = win.$(element).get(0);
win.$.each(win.$(target.attributes), function(index) {
attributes += target.attributes[index].name + "=\"" + target.attributes[index].value+ "\" ";
});
//TODO: This doesn't take into acount any other attributes other than 'style', this needs to be changed
canvasHTML += "<"+ element.get(0).tagName + " "+ attributes +">\n" + element.clone().find("*").remove().end().text();
//Go through all of the children of this element
if (element.children().size() > 0) {
element.children().each( function() {
canvasHTML += recursiveHTMLAppendFunction(win, "", win.$(this));
});
}
canvasHTML += "</"+ element.get(0).tagName + ">\n";
return canvasHTML;
};
getCssStyle = function(element) {
var attr = ['font-family','font-size','font-weight','font-style','color',
'text-transform','text-decoration','letter-spacing','word-spacing',
'line-height','text-align','vertical-align','direction','background-color',
'background-image','background-repeat','background-position',
'background-attachment','opacity','width','height','top','right','bottom',
'left','margin-top','margin-right','margin-bottom','margin-left',
'padding-top','padding-right','padding-bottom','padding-left',
'border-top-width','border-right-width','border-bottom-width',
'border-left-width','border-top-color','border-right-color',
'border-bottom-color','border-left-color','border-top-style',
'border-right-style','border-bottom-style','border-left-style','position',
'display','visibility','z-index','overflow-x','overflow-y','white-space',
'clip','float','clear','cursor','list-style-image','list-style-position',
'list-style-type','marker-offset'];
var len = attr.length;
var style = "#" + element.attr('id') + "{\n";
for (var i = 0; i < len; i++){
var attributeName = attr[i];
var attributeValue = element.css(attributeName);
if (attributeValue){
//style += attributeName + ":" + element.css(attributeName) + ";\n";
style += attributeName + ":" + element.attr(attributeName) + ";\n";
}
//obj[attr[i]] = jQuery.fn.css2.call(this, attr[i]);
}
style += "}\n";
return style;
};
getAbsolutePath = function(pageUrl, imageRelativePath){
if (imageRelativePath.indexOf("http://") === 0) return imageRelativePath;
var rootUrl = pageUrl.substr(7);
if (imageRelativePath.charAt(0) === "/"){
rootUrl = rootUrl.split("/")[0];
} else if(imageRelativePath.substr(0,2) === "./"){
rootUrl = rootUrl.split("/")[0];
} else{
var index = rootUrl.lastIndexOf("/");
rootUrl = rootUrl.slice(0, index + 1);
}
console.log(rootUrl + imageRelativePath);
return "http://" + rootUrl + imageRelativePath;
};