117 lines
2.6 KiB
JavaScript
117 lines
2.6 KiB
JavaScript
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var Class = require('../core/class');
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module.exports = Class({
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// placement
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_resetPlacement: function(){
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var container = this.parentNode;
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if (container){
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var previous = this.previousSibling, next = this.nextSibling;
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if (previous){
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previous.nextSibling = next;
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} else {
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container.firstChild = next;
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}
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if (next){
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next.previousSibling = previous;
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} else {
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container.lastChild = this.previousSibling;
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}
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}
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this.previousSibling = null;
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this.nextSibling = null;
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this.parentNode = null;
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return this;
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},
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inject: function(container){
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this._resetPlacement();
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var last = container.lastChild;
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if (last){
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last.nextSibling = this;
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this.previousSibling = last;
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} else {
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container.firstChild = this;
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}
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container.lastChild = this;
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this.parentNode = container;
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this._place();
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return this;
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},
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injectBefore: function(sibling){
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this._resetPlacement();
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var container = sibling.parentNode;
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if (!container) return this;
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var previous = sibling.previousSibling;
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if (previous){
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previous.nextSibling = this;
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this.previousSibling = previous;
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} else {
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container.firstChild = this;
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}
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sibling.previousSibling = this;
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this.nextSibling = sibling;
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this.parentNode = container;
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this._place();
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return this;
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},
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eject: function(){
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this._resetPlacement();
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this._place();
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return this;
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},
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_place: function(){},
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// events
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dispatch: function(event){
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var events = this._events,
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listeners = events && events[event.type];
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if (listeners){
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listeners = listeners.slice(0);
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for (var i = 0, l = listeners.length; i < l; i++){
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var fn = listeners[i], result;
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if (typeof fn == 'function')
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result = fn.call(this, event);
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else
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result = fn.handleEvent(event);
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if (result === false) event.preventDefault();
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}
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}
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if (this.parentNode && this.parentNode.dispatch){
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this.parentNode.dispatch(event);
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}
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},
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subscribe: function(type, fn, bind){
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if (typeof type != 'string'){ // listen type / fn with object
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var subscriptions = [];
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for (var t in type) subscriptions.push(this.subscribe(t, type[t]));
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return function(){ // unsubscribe
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for (var i = 0, l = subscriptions.length; i < l; i++)
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subscriptions[i]();
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return this;
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};
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} else { // listen to one
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var bound = typeof fn === 'function' ? fn.bind(bind || this) : fn,
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events = this._events || (this._events = {}),
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listeners = events[type] || (events[type] = []);
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listeners.push(bound);
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return function(){
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// unsubscribe
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for (var i = 0, l = listeners.length; i < l; i++){
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if (listeners[i] === bound){
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listeners.splice(i, 1);
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break;
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}
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}
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}
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}
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}
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});
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