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224 lines (184 loc) · 4.34 KB
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//css selector
/*
from html
<div>
</div>
<p>
<span></span>
<span></span>
<span></span>
<span></span>
</p>
<div>
<span class = 'a'></span>
<span class = 'b'></span>
<span class = 'b'></span>
<span ></span>
</div>
from demo
window.onload = function(){
change
$().getId('box').css('color','red');
to
$('#box').css('color','red');
}
*/
//$('p .a') or $('#box p .a')
var $ = function(args){
return new Base(args);
}
// $('#box')
function Base(args){
// creat a array
this.elements = [];
if (typeof args == 'string'){
//like css style
if (args.indexOf(' ') != -1) {
var elements = args.split(' ');
var childElements = [];
var node = [];
for (var i = 0; i < elements.length; i++) {
if (node.length == 0) {
node.push(document);
}
switch(elements[i].charAt(0)){
case '#':
childElements = [];
//this.getId(args.substring(1));
childElements.push(this.getId(elements[i].substring(1)));
node = childElements;
break;
case '.':
childElements = [];
for (var j = 0; j < node.length; j++){
var temps = this.getClass(elements[i].substring(1),node[j]);
for (var k = 0; k < temps.length; k++) {
childElements.push(temps[k]);
}
}
node = childElements;
break;
default:
childElements = [];
for (var j = 0; j < node.length; j++){
var temps = this.getTagName(elements[i],node[j]);
for (var k = 0; k < temps.length; k++) {
childElements.push(temps[k]);
}
}
node = childElements;
}
}
this.elements = childElements;
}else { // for find()
switch(args.charAt(0)){
case '#':
//this.getId(args.substring(1));
this.elements.push(this.getId(args.substring(1)));
break;
case '.':
this.elements = this.getClass(args.substring(1));
break;
default:
this.elements = this.getTagName(args);
}
}
}else if (typeof args == 'object'){
if (args != undefined){
this.elements[0] = args;
}
}
}
Base.prototype.getId = function(id){
//this.elements.push(document.getElementById(id));
//return this;
return document.getElementById(id);
}
Base.prototype.getClass = function(className,parentNode){
var node = null;
var temps = [];
//if (arguments.length == 2){
if (parentNode != undefined){
//node = document.getElementById(idName);
node = parentNode;
}else {
node = document;
}
var all = node.getElementsByTagName('*');
for (var i = 0; i < all.length; i++){
if (all[i].className == className){
//this.elements.push(all[i]);
temps.push(all[i]);
}
}
return temps;
}
Base.prototype.getTagName = function(tag,parentNode){
/*
var tags = document.getElementsByTagName(tag);
for (var i = 0; i < tags.length; i++){
this.elements.push(tags[i]);
}
return this;*/
var node = null;
var temps = [];
if (parentNode != undefined){
//node = document.getElementById(idName);
node = parentNode;
}else {
node = document;
}
var tags = node.getElementsByTagName(tag);
for (var i = 0; i < tags.length; i++){
temps.push(tags[i]);
}
return temps;
}
//$(p).find(span)
Base.prototype.find = function(str){
var childElements = [];
for (var i = 0; i < this.elements.length; i++){
switch(str.charAt(0)){
case '#':
childElements.push(document.getElementById(str.substring(1)));
//unnecessary for DOM search
//this.getId(args.substring(1));
break;
case '.':
/*
var all = this.elements[i].getElementsByTagName('*');
for (var j = 0; j < all.length; j++){
if (all[j].className == str.substring(1)){
childElements.push(all[j]);
}
}
//this.getClass(args.substring(1));*/
var temps = this.getClass(str.substring(1),this.elements[i]);
for (var j = 0; j < temps.length; j++) {
childElements.push(temps[j]);
}
break;
default:
//this.getTagName(args);
/*var tags = this.elements[i].getElementsByTagName(str);
for (var j = 0; j < tags.length; j++){
childElements.push(tags[j]);
}*/
var temps = this.getTagName(str,this.elements[i]);
for (var j = 0; j < temps.length; j++) {
childElements.push(temps[j]);
}
}
}
this.elements = childElements;
return this;
}
Base.prototype.css = function(attr,value){
for (var i = 0; i < this.elements.length; i++){
if (arguments.length == 1) {
getStyle(elements[i],attr);
}
this.elements[i].style[attr] = value;
}
return this;
}