uBlock/js/udom.js

497 lines
14 KiB
JavaScript

/*******************************************************************************
µBlock - a Chromium browser extension to block requests.
Copyright (C) 2014 Raymond Hill
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
/******************************************************************************/
/******************************************************************************/
// It's just a silly, minimalist DOM framework: this allows me to not rely
// on jQuery. jQuery contains way too much stuff than I need, and as per
// Opera rules, I am not allowed to use a cut-down version of jQuery. So
// the code here does *only* what I need, and nothing more, and with a lot
// of assumption on passed parameters, etc. I grow it on a per-need-basis only.
var uDom = (function() {
/******************************************************************************/
var DOMList = function() {
this.nodes = [];
};
/******************************************************************************/
var DOMListFactory = function(selector, context) {
var r = new DOMList();
if ( typeof selector === 'string' ) {
selector = selector.trim();
if ( selector.charAt(0) === '<' ) {
return addHTMLToList(r, selector);
}
if ( selector !== '' ) {
return addSelectorToList(r, selector, context);
}
}
if ( selector instanceof Node ) {
return addNodeToList(r, selector);
}
if ( selector instanceof NodeList ) {
return addNodeListToList(r, selector);
}
if ( selector instanceof DOMList ) {
return addListToList(r, selector);
}
return r;
};
/******************************************************************************/
DOMListFactory.onLoad = function(callback) {
window.addEventListener('load', callback);
};
/******************************************************************************/
var addNodeToList = function(list, node) {
if ( node ) {
list.nodes.push(node);
}
return list;
};
/******************************************************************************/
var addNodeListToList = function(list, nodelist) {
if ( nodelist ) {
var n = nodelist.length;
for ( var i = 0; i < n; i++ ) {
list.nodes.push(nodelist[i]);
}
}
return list;
};
/******************************************************************************/
var addListToList = function(list, other) {
list.nodes = list.nodes.concat(other.nodes);
return list;
};
/******************************************************************************/
var addSelectorToList = function(list, selector, context) {
var p = context || document;
var r = p.querySelectorAll(selector);
var i = r.length;
while ( i-- ) {
list.nodes.push(r[i]);
}
return list;
};
/******************************************************************************/
var pTagOfChildTag = {
'tr': 'table',
'option': 'select'
};
var addHTMLToList = function(list, html) {
var matches = html.match(/^<([a-z]+)/);
if ( !matches || matches.length !== 2 ) {
return this;
}
var cTag = matches[1];
var pTag = pTagOfChildTag[cTag] || 'div';
var p = document.createElement(pTag);
p.innerHTML = html;
// Find real parent
var c = p.querySelector(cTag);
p = c.parentNode;
while ( p.firstChild ) {
list.nodes.push(p.removeChild(p.firstChild));
}
return list;
};
/******************************************************************************/
DOMList.prototype.length = function() {
return this.nodes.length;
};
/******************************************************************************/
DOMList.prototype.subset = function(i, l) {
var r = new DOMList();
var n = l !== undefined ? l : 1;
var j = Math.min(i + n, this.nodes.length);
if ( i < j ) {
r.nodes = this.nodes.slice(i, j);
}
return r;
};
/******************************************************************************/
DOMList.prototype.first = function() {
return this.subset(0);
};
/******************************************************************************/
DOMList.prototype.node = function(i) {
return this.nodes[i];
};
/******************************************************************************/
DOMList.prototype.parent = function() {
var r = new DOMList();
if ( this.nodes.length ) {
addNodeToList(r, this.nodes[0].parentNode);
}
return r;
};
/******************************************************************************/
DOMList.prototype.find = function(selector) {
var r = new DOMList();
var n = this.nodes.length;
var nl;
for ( var i = 0; i < n; i++ ) {
nl = this.nodes[i].querySelectorAll(selector);
addNodeListToList(r, nl);
}
return r;
};
/******************************************************************************/
DOMList.prototype.forEach = function(callback) {
var n = this.nodes.length;
for ( var i = 0; i < n; i++ ) {
callback.bind(this.nodes[i]).call();
}
return this;
};
/******************************************************************************/
DOMList.prototype.remove = function() {
var n = this.nodes.length;
var c, p;
for ( var i = 0; i < n; i++ ) {
c = this.nodes[i];
if ( p = c.parentNode ) {
p.removeChild(c);
}
}
return this;
};
/******************************************************************************/
DOMList.prototype.empty = function() {
var node;
var i = this.nodes.length;
while ( i-- ) {
node = this.nodes[i];
while ( node.firstChild ) {
node.removeChild(node.firstChild);
}
}
return this;
};
/******************************************************************************/
DOMList.prototype.append = function(selector, context) {
var p = this.nodes[0];
if ( p ) {
var c = DOMListFactory(selector, context);
var n = c.nodes.length;
for ( var i = 0; i < n; i++ ) {
p.appendChild(c.nodes[i]);
}
}
return this;
};
/******************************************************************************/
DOMList.prototype.prepend = function(selector, context) {
var p = this.nodes[0];
if ( p ) {
var c = DOMListFactory(selector, context);
var i = c.nodes.length;
while ( i-- ) {
p.insertBefore(c.nodes[i], p.firstChild);
}
}
return this;
};
/******************************************************************************/
DOMList.prototype.appendTo = function(selector, context) {
var p = DOMListFactory(selector, context);
if ( p.length ) {
var n = this.nodes.length;
for ( var i = 0; i < n; i++ ) {
p.nodes[0].appendChild(this.nodes[i]);
}
}
return this;
};
/******************************************************************************/
DOMList.prototype.insertAfter = function(selector, context) {
if ( this.nodes.length === 0 ) {
return this;
}
var p = this.nodes[0].parentNode;
if ( !p ) {
return this;
}
var c = DOMListFactory(selector, context);
var n = c.nodes.length;
for ( var i = 0; i < n; i++ ) {
p.appendChild(c.nodes[i]);
}
return this;
};
/******************************************************************************/
DOMList.prototype.clone = function(notDeep) {
var r = new DOMList();
var n = this.nodes.length;
for ( var i = 0; i < n; i++ ) {
addNodeToList(r, this.nodes[i].cloneNode(!notDeep));
}
return r;
};
/******************************************************************************/
DOMList.prototype.attr = function(attr, value) {
var i = this.nodes.length;
if ( value === undefined && typeof attr !== 'object' ) {
return i ? this.nodes[0].getAttribute(attr) : undefined;
}
if ( typeof attr === 'object' ) {
var attrNames = Object.keys(attr);
var node, j, attrName;
while ( i-- ) {
node = this.nodes[i];
j = attrNames.length;
while ( j-- ) {
attrName = attrNames[j];
node.setAttribute(attrName, attr[attrName]);
}
}
} else {
while ( i-- ) {
this.nodes[i].setAttribute(attr, value);
}
}
return this;
};
/******************************************************************************/
DOMList.prototype.prop = function(prop, value) {
var i = this.nodes.length;
if ( value === undefined ) {
return i ? this.nodes[0][prop] : undefined;
}
while ( i-- ) {
this.nodes[i][prop] = value;
}
return this;
};
/******************************************************************************/
DOMList.prototype.css = function(prop, value) {
var i = this.nodes.length;
if ( value === undefined ) {
return i ? this.nodes[0].style[prop] : undefined;
}
while ( i-- ) {
this.nodes[i].style[prop] = value;
}
return this;
};
/******************************************************************************/
DOMList.prototype.val = function(value) {
return this.prop('value', value);
};
/******************************************************************************/
DOMList.prototype.html = function(html) {
var i = this.nodes.length;
if ( html === undefined ) {
return i ? this.nodes[0].innerHTML : '';
}
while ( i-- ) {
this.nodes[i].innerHTML = html;
}
return this;
};
/******************************************************************************/
DOMList.prototype.text = function(text) {
var i = this.nodes.length;
if ( text === undefined ) {
return i ? this.nodes[0].textContent : '';
}
while ( i-- ) {
this.nodes[i].textContent = text;
}
return this;
};
/******************************************************************************/
DOMList.prototype.hasClassName = function(className) {
if ( !this.nodes.length ) {
return false;
}
var re = new RegExp('(^| )' + className + '( |$)');
return re.test(this.nodes[0].className);
};
DOMList.prototype.addClass = function(className) {
return this.toggleClass(className, true);
};
DOMList.prototype.removeClass = function(className) {
if ( className !== undefined ) {
return this.toggleClass(className, false);
}
var i = this.nodes.length;
while ( i-- ) {
this.nodes[i].className = '';
}
return this;
};
DOMList.prototype.toggleClass = function(className, targetState) {
var re = new RegExp('(^| )' + className + '( |$)');
var n = this.nodes.length;
var node, currentState, newState, newClassName;
for ( var i = 0; i < n; i++ ) {
node = this.nodes[i];
currentState = re.test(node.className);
newState = targetState;
if ( newState === undefined ) {
newState = !currentState;
}
if ( newState === currentState ) {
continue;
}
newClassName = node.className;
if ( newState ) {
newClassName += ' ' + className;
} else {
newClassName = newClassName.replace(re, ' ');
}
node.className = newClassName.trim();
}
return this;
};
/******************************************************************************/
var makeEventHandler = function(context, selector, callback) {
return function(event) {
var candidates = context.querySelectorAll(selector);
if ( !candidates.length ) {
return;
}
var node = event.target;
var i;
while ( node && node !== context ) {
i = candidates.length;
while ( i-- ) {
if ( candidates[i] === node ) {
return callback.bind(node).call(event);
}
}
node = node.parentNode;
}
};
};
DOMList.prototype.on = function(etype, selector, callback) {
if ( typeof selector === 'function' ) {
callback = selector;
selector = undefined;
}
var i = this.nodes.length;
while ( i-- ) {
if ( selector !== undefined ) {
this.nodes[i].addEventListener(etype, makeEventHandler(this.nodes[i], selector, callback), true);
} else {
this.nodes[i].addEventListener(etype, callback);
}
}
return this;
};
/******************************************************************************/
// TODO: Won't work for delegated handlers. Need to figure
// what needs to be done.
DOMList.prototype.off = function(evtype, callback) {
var i = this.nodes.length;
while ( i-- ) {
this.nodes[i].removeEventListener(evtype, callback);
}
return this;
};
/******************************************************************************/
DOMList.prototype.trigger = function(etype) {
var ev = new CustomEvent(etype);
var i = this.nodes.length;
while ( i-- ) {
this.nodes[i].dispatchEvent(ev);
}
return this;
};
/******************************************************************************/
return DOMListFactory;
})();