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prettyprint.js
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/*
AUTHOR James Padolsey (http://james.padolsey.com)
VERSION 1.02.1
UPDATED 07-14-2009
CONTRIBUTORS
David Waller
*/
var prettyPrint = (function(){
/* These "util" functions are not part of the core
functionality but are all necessary - mostly DOM helpers */
var util = {
el: function(type, attrs) {
/* Create new element */
var el = document.createElement(type), attr;
/*Copy to single object */
attrs = util.merge({}, attrs);
/* Add attributes to el */
if (attrs && attrs.style) {
var styles = attrs.style;
util.applyCSS( el, attrs.style );
delete attrs.style;
}
for (attr in attrs) {
if (attrs.hasOwnProperty(attr)) {
el[attr] = attrs[attr];
}
}
return el;
},
applyCSS: function(el, styles) {
/* Applies CSS to a single element */
for (var prop in styles) {
if (styles.hasOwnProperty(prop)) {
try{
/* Yes, IE6 SUCKS! */
el.style[prop] = styles[prop];
}catch(e){}
}
}
},
txt: function(t) {
/* Create text node */
return document.createTextNode(t);
},
row: function(cells, type, cellType) {
/* Creates new <tr> */
cellType = cellType || 'td';
/* colSpan is calculated by length of null items in array */
var colSpan = util.count(cells, null) + 1,
tr = util.el('tr'), td,
attrs = {
style: util.getStyles(cellType, type),
colSpan: colSpan,
onmouseover: function() {
var tds = this.parentNode.childNodes;
util.forEach(tds, function(cell){
if (cell.nodeName.toLowerCase() !== 'td') { return; }
util.applyCSS(cell, util.getStyles('td_hover', type));
});
},
onmouseout: function() {
var tds = this.parentNode.childNodes;
util.forEach(tds, function(cell){
if (cell.nodeName.toLowerCase() !== 'td') { return; }
util.applyCSS(cell, util.getStyles('td', type));
});
}
};
util.forEach(cells, function(cell){
if (cell === null) { return; }
/* Default cell type is <td> */
td = util.el(cellType, attrs);
if (cell.nodeType) {
/* IsDomElement */
td.appendChild(cell);
} else {
/* IsString */
td.innerHTML = util.shorten(cell.toString());
}
tr.appendChild(td);
});
return tr;
},
hRow: function(cells, type){
/* Return new <th> */
return util.row(cells, type, 'th');
},
table: function(headings, type){
headings = headings || [];
/* Creates new table: */
var attrs = {
thead: {
style:util.getStyles('thead',type)
},
tbody: {
style:util.getStyles('tbody',type)
},
table: {
style:util.getStyles('table',type)
}
},
tbl = util.el('table', attrs.table),
thead = util.el('thead', attrs.thead),
tbody = util.el('tbody', attrs.tbody);
if (headings.length) {
tbl.appendChild(thead);
thead.appendChild( util.hRow(headings, type) );
}
tbl.appendChild(tbody);
return {
/* Facade for dealing with table/tbody
Actual table node is this.node: */
node: tbl,
tbody: tbody,
thead: thead,
appendChild: function(node) {
this.tbody.appendChild(node);
},
addRow: function(cells, _type, cellType){
this.appendChild(util.row.call(util, cells, (_type || type), cellType));
return this;
}
};
},
shorten: function(str) {
var max = 40;
str = str.replace(/^\s\s*|\s\s*$|\n/g,'');
return str.length > max ? (str.substring(0, max-1) + '...') : str;
},
htmlentities: function(str) {
return str.replace(/&/g, '&').replace(/</g, '<').replace(/>/g, '>');
},
merge: function(target, source) {
/* Merges two (or more) objects,
giving the last one precedence */
if ( typeof target !== 'object' ) {
target = {};
}
for (var property in source) {
if ( source.hasOwnProperty(property) ) {
var sourceProperty = source[ property ];
if ( typeof sourceProperty === 'object' ) {
target[ property ] = util.merge( target[ property ], sourceProperty );
continue;
}
target[ property ] = sourceProperty;
}
}
for (var a = 2, l = arguments.length; a < l; a++) {
util.merge(target, arguments[a]);
}
return target;
},
count: function(arr, item) {
var count = 0;
for (var i = 0, l = arr.length; i< l; i++) {
if (arr[i] === item) {
count++;
}
}
return count;
},
thead: function(tbl) {
return tbl.getElementsByTagName('thead')[0];
},
forEach: function(arr, fn) {
/* Helper: iteration */
var len = arr.length, index = -1;
while (len > ++index) {
if(fn( arr[index], index, arr ) === false) {
break;
}
}
return true;
},
type: function(v){
try {
/* Returns type, e.g. "string", "number", "array" etc.
Note, this is only used for precise typing. */
if (v === null) { return 'null'; }
if (v === undefined) { return 'undefined'; }
var oType = Object.prototype.toString.call(v).match(/\s(.+?)\]/)[1].toLowerCase();
if (v.nodeType) {
if (v.nodeType === 1) {
return 'domelement';
}
return 'domnode';
}
if (/^(string|number|array|regexp|function|date|boolean)$/.test(oType)) {
return oType;
}
if (typeof v === 'object') {
return v.jquery && typeof v.jquery === 'string' ? 'jquery' : 'object';
}
if (v === window || v === document) {
return 'object';
}
return 'default';
} catch(e) {
return 'default';
}
},
within: function(ref) {
/* Check existence of a val within an object
RETURNS KEY */
return {
is: function(o) {
for (var i in ref) {
if (ref[i] === o) {
return i;
}
}
return '';
}
};
},
common: {
circRef: function(obj, key, settings) {
return util.expander(
'[POINTS BACK TO <strong>' + (key) + '</strong>]',
'Click to show this item anyway',
function() {
this.parentNode.appendChild( prettyPrintThis(obj,{maxDepth:1}) );
}
);
},
depthReached: function(obj, settings) {
return util.expander(
'[DEPTH REACHED]',
'Click to show this item anyway',
function() {
try {
this.parentNode.appendChild( prettyPrintThis(obj,{maxDepth:1}) );
} catch(e) {
this.parentNode.appendChild(
util.table(['ERROR OCCURED DURING OBJECT RETRIEVAL'],'error').addRow([e.message]).node
);
}
}
);
}
},
getStyles: function(el, type) {
type = prettyPrintThis.settings.styles[type] || {};
return util.merge(
{}, prettyPrintThis.settings.styles['default'][el], type[el]
);
},
expander: function(text, title, clickFn) {
return util.el('a', {
innerHTML: util.shorten(text) + ' <b style="visibility:hidden;">[+]</b>',
title: title,
onmouseover: function() {
this.getElementsByTagName('b')[0].style.visibility = 'visible';
},
onmouseout: function() {
this.getElementsByTagName('b')[0].style.visibility = 'hidden';
},
onclick: function() {
this.style.display = 'none';
clickFn.call(this);
return false;
},
style: {
cursor: 'pointer'
}
});
},
stringify: function(obj) {
/* Bit of an ugly duckling!
- This fn returns an ATTEMPT at converting an object/array/anyType
into a string, kinda like a JSON-deParser
- This is used for when |settings.expanded === false| */
var type = util.type(obj),
str, first = true;
if ( type === 'array' ) {
str = '[';
util.forEach(obj, function(item,i){
str += (i===0?'':', ') + util.stringify(item);
});
return str + ']';
}
if (typeof obj === 'object') {
str = '{';
for (var i in obj){
if (obj.hasOwnProperty(i)) {
str += (first?'':', ') + i + ':' + util.stringify(obj[i]);
first = false;
}
}
return str + '}';
}
if (type === 'regexp') {
return '/' + obj.source + '/';
}
if (type === 'string') {
return '"' + obj.replace(/"/g,'\\"') + '"';
}
return obj.toString();
},
headerGradient: (function(){
var canvas = document.createElement('canvas');
if (!canvas.getContext) { return ''; }
var cx = canvas.getContext('2d');
canvas.height = 30;
canvas.width = 1;
var linearGrad = cx.createLinearGradient(0,0,0,30);
linearGrad.addColorStop(0,'rgba(0,0,0,0)');
linearGrad.addColorStop(1,'rgba(0,0,0,0.25)');
cx.fillStyle = linearGrad;
cx.fillRect(0,0,1,30);
var dataURL = canvas.toDataURL && canvas.toDataURL();
return 'url(' + (dataURL || '') + ')';
})()
};
// Main..
var prettyPrintThis = function(obj, options) {
/*
* obj :: Object to be printed
* options :: Options (merged with config)
*/
options = options || {};
var settings = util.merge( {}, prettyPrintThis.config, options ),
container = util.el('div'),
config = prettyPrintThis.config,
currentDepth = 0,
stack = {},
hasRunOnce = false;
/* Expose per-call settings.
Note: "config" is overwritten (where necessary) by options/"settings"
So, if you need to access/change *DEFAULT* settings then go via ".config" */
prettyPrintThis.settings = settings;
var typeDealer = {
string : function(item){
return util.txt('"' + util.shorten(item.replace(/"/g,'\\"')) + '"');
},
number : function(item) {
return util.txt(item);
},
regexp : function(item) {
var miniTable = util.table(['RegExp',null], 'regexp');
var flags = util.table();
var span = util.expander(
'/' + item.source + '/',
'Click to show more',
function() {
this.parentNode.appendChild(miniTable.node);
}
);
flags
.addRow(['g', item.global])
.addRow(['i', item.ignoreCase])
.addRow(['m', item.multiline]);
miniTable
.addRow(['source', '/' + item.source + '/'])
.addRow(['flags', flags.node])
.addRow(['lastIndex', item.lastIndex]);
return settings.expanded ? miniTable.node : span;
},
domelement : function(element, depth) {
var miniTable = util.table(['DOMElement',null], 'domelement'),
props = ['id', 'className', 'innerHTML', 'src', 'href'], elname = element.nodeName || '';
miniTable.addRow(['tag', '<' + elname.toLowerCase() + '>']);
util.forEach(props, function(prop){
if ( element[prop] ) {
miniTable.addRow([ prop, util.htmlentities(element[prop]) ]);
}
});
return settings.expanded ? miniTable.node : util.expander(
'DOMElement (' + elname.toLowerCase() + ')',
'Click to show more',
function() {
this.parentNode.appendChild(miniTable.node);
}
);
},
domnode : function(node){
/* Deals with all DOMNodes that aren't elements (nodeType !== 1) */
var miniTable = util.table(['DOMNode',null], 'domelement'),
data = util.htmlentities( (node.data || 'UNDEFINED').replace(/\n/g,'\\n') );
miniTable
.addRow(['nodeType', node.nodeType + ' (' + node.nodeName + ')'])
.addRow(['data', data]);
return settings.expanded ? miniTable.node : util.expander(
'DOMNode',
'Click to show more',
function() {
this.parentNode.appendChild(miniTable.node);
}
);
},
jquery : function(obj, depth, key) {
return typeDealer['array'](obj, depth, key, true);
},
object : function(obj, depth, key) {
/* Checking depth + circular refs */
/* Note, check for circular refs before depth; just makes more sense */
var stackKey = util.within(stack).is(obj);
if ( stackKey ) {
return util.common.circRef(obj, stackKey, settings);
}
stack[key||'TOP'] = obj;
if (depth === settings.maxDepth) {
return util.common.depthReached(obj, settings);
}
var table = util.table(['Object', null],'object'),
isEmpty = true;
for (var i in obj) {
if (!obj.hasOwnProperty || obj.hasOwnProperty(i)) {
var item = obj[i],
type = util.type(item);
isEmpty = false;
try {
table.addRow([i, typeDealer[ type ](item, depth+1, i)], type);
} catch(e) {
/* Security errors are thrown on certain Window/DOM properties */
if (window.console && window.console.log) {
console.log(e.message);
}
}
}
}
if (isEmpty) {
table.addRow(['<small>[empty]</small>']);
} else {
table.thead.appendChild(
util.hRow(['key','value'], 'colHeader')
);
}
var ret = (settings.expanded || hasRunOnce) ? table.node : util.expander(
util.stringify(obj),
'Click to show more',
function() {
this.parentNode.appendChild(table.node);
}
);
hasRunOnce = true;
return ret;
},
array : function(arr, depth, key, jquery) {
/* Checking depth + circular refs */
/* Note, check for circular refs before depth; just makes more sense */
var stackKey = util.within(stack).is(arr);
if ( stackKey ) {
return util.common.circRef(arr, stackKey);
}
stack[key||'TOP'] = arr;
if (depth === settings.maxDepth) {
return util.common.depthReached(arr);
}
/* Accepts a table and modifies it */
var me = jquery ? 'jQuery' : 'Array', table = util.table([me + '(' + arr.length + ')', null], jquery ? 'jquery' : me.toLowerCase()),
isEmpty = true;
if (jquery){
table.addRow(['selector',arr.selector]);
}
util.forEach(arr, function(item,i){
isEmpty = false;
table.addRow([i, typeDealer[ util.type(item) ](item, depth+1, i)]);
});
if (!jquery){
if (isEmpty) {
table.addRow(['<small>[empty]</small>']);
} else {
table.thead.appendChild( util.hRow(['index','value'], 'colHeader') );
}
}
return settings.expanded ? table.node : util.expander(
util.stringify(arr),
'Click to show more',
function() {
this.parentNode.appendChild(table.node);
}
);
},
'function' : function(fn, depth, key) {
/* Checking JUST circular refs */
var stackKey = util.within(stack).is(fn);
if ( stackKey ) { return util.common.circRef(fn, stackKey); }
stack[key||'TOP'] = fn;
var miniTable = util.table(['Function',null], 'function'),
argsTable = util.table(['Arguments']),
args = fn.toString().match(/\((.+?)\)/),
body = fn.toString().match(/\(.*?\)\s+?\{?([\S\s]+)/)[1].replace(/\}?$/,'');
miniTable
.addRow(['arguments', args ? args[1].replace(/[^\w_,\s]/g,'') : '<small>[none/native]</small>'])
.addRow(['body', body]);
return settings.expanded ? miniTable.node : util.expander(
'function(){...}',
'Click to see more about this function.',
function(){
this.parentNode.appendChild(miniTable.node);
}
);
},
'date' : function(date) {
var miniTable = util.table(['Date',null], 'date'),
sDate = date.toString().split(/\s/);
/* TODO: Make this work well in IE! */
miniTable
.addRow(['Time', sDate[4]])
.addRow(['Date', sDate.slice(0,4).join('-')]);
return settings.expanded ? miniTable.node : util.expander(
'Date (timestamp): ' + (+date),
'Click to see a little more info about this date',
function() {
this.parentNode.appendChild(miniTable.node);
}
);
},
'boolean' : function(bool) {
return util.txt( bool.toString().toUpperCase() );
},
'undefined' : function() {
return util.txt('UNDEFINED');
},
'null' : function() {
return util.txt('NULL');
},
'default' : function() {
/* When a type cannot be found */
return util.txt('prettyPrint: TypeNotFound Error');
}
};
container.appendChild( typeDealer[ (settings.forceObject) ? 'object' : util.type(obj) ](obj, currentDepth) );
return container;
};
/* Configuration */
/* All items can be overwridden by passing an
"options" object when calling prettyPrint */
prettyPrintThis.config = {
/* Try setting this to false to save space */
expanded: true,
forceObject: false,
maxDepth: 3,
styles: {
array: {
th: {
backgroundColor: '#6DBD2A',
color: 'white'
}
},
'function': {
th: {
backgroundColor: '#D82525'
}
},
regexp: {
th: {
backgroundColor: '#E2F3FB',
color: '#000'
}
},
object: {
th: {
backgroundColor: '#1F96CF'
}
},
jquery : {
th: {
backgroundColor: '#FBF315'
}
},
error: {
th: {
backgroundColor: 'red',
color: 'yellow'
}
},
domelement: {
th: {
backgroundColor: '#F3801E'
}
},
date: {
th: {
backgroundColor: '#A725D8'
}
},
colHeader: {
th: {
backgroundColor: '#EEE',
color: '#000',
textTransform: 'uppercase'
}
},
'default': {
table: {
borderCollapse: 'collapse',
width: '100%'
},
td: {
padding: '5px',
fontSize: '12px',
backgroundColor: '#FFF',
color: '#222',
border: '1px solid #000',
verticalAlign: 'top',
fontFamily: '"Consolas","Lucida Console",Courier,mono',
whiteSpace: 'nowrap'
},
td_hover: {
/* Styles defined here will apply to all tr:hover > td,
- Be aware that "inheritable" properties (e.g. fontWeight) WILL BE INHERITED */
},
th: {
padding: '5px',
fontSize: '12px',
backgroundColor: '#222',
color: '#EEE',
textAlign: 'left',
border: '1px solid #000',
verticalAlign: 'top',
fontFamily: '"Consolas","Lucida Console",Courier,mono',
backgroundImage: util.headerGradient,
backgroundRepeat: 'repeat-x'
}
}
}
};
return prettyPrintThis;
})();