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| // ==UserScript== | |
| // @name autopager | |
| // @namespace http://tampermonkey.net/ | |
| // @version 0.1 | |
| // @description try to take over the world! | |
| // @author wangbin | |
| // @match http://*/* | |
| // @include http* | |
| // @grant none | |
| // ==/UserScript== | |
| (function() { | |
| 'use strict' | |
| ;function defined(o) { | |
| return o !== undefined && o !== null | |
| } | |
| ;function Binding(vm, el, key, binder) { | |
| this.vm = vm | |
| this.el = el | |
| this.key = key | |
| this.binder = binder | |
| if(_.isFunction(binder)) { | |
| this.binder.sync = binder | |
| } | |
| this.bind = this.bind.bind(this) | |
| this.sync = this.sync.bind(this) | |
| this.update = this.update.bind(this) | |
| this.unwatch = watch(this.vm.data, this.key, this.sync) | |
| } | |
| var fn = Binding.prototype | |
| fn.bind = function() { | |
| if(defined(this.binder.bind)) { | |
| this.binder.bind.call(this, this.el) | |
| } | |
| this.sync() | |
| } | |
| fn.unbind = function() { | |
| this.unwatch() | |
| if(defined(this.binder.unbind)) { | |
| this.binder.unbind.call(this, this.el) | |
| } | |
| } | |
| fn.sync = function() { | |
| if(defined(this.binder.sync)) { | |
| this.binder.sync.call(this, this.el, this.value()) | |
| }) | |
| } | |
| fn.update = function() { | |
| if(defined(this.binder.sync)) { | |
| var value = this.binder.value.call(this, this.el) | |
| this.value(value) | |
| }) | |
| } | |
| fn.value = function(r) { | |
| if(r === undefined) { | |
| return this.vm.data[this.key] | |
| } else { | |
| this.vm.data[this.key] = r | |
| } | |
| } | |
| ;function ViewModel(el, options) { | |
| this.init(el, options) | |
| } | |
| window.ViewModel = ViewModel | |
| fn = ViewModel.prototype | |
| fn.init = function(el, options) { | |
| this.el = el | |
| this.options = options | |
| this.data = options.data || {} | |
| this.bindings = [] | |
| this.compile(this.el) | |
| this.bind() | |
| } | |
| fn.compile = function(el) { | |
| var block = false | |
| if(el.nodeType !== 1) { | |
| return | |
| } | |
| var dataset = el.dataset | |
| for(var data in dataset) { | |
| var binder = ViewModel.binders[data] | |
| var key = dataset[data] | |
| if(binder === undefined) { | |
| binder = ViewModel.binders['*'] | |
| } | |
| if(defined(binder)) { | |
| this.bindings.push(new Binding(this, el, key, binder)) | |
| } | |
| } | |
| if(!block) { | |
| el.childNodes.forEach((childEl) => { | |
| this.compile(childEl) | |
| }) | |
| } | |
| } | |
| fn.bind = function() { | |
| this.bindings.sort((a, b) => { | |
| var aPriority = defined(a.binder) ? (a.binder.priority || 0) : 0 | |
| var bPriority = defined(b.binder) ? (b.binder.priority || 0) : 0 | |
| return bPriority - aPriority | |
| }) | |
| this.bindings.forEach(binding => { | |
| binding.bind() | |
| }) | |
| } | |
| fn.unbind = function() { | |
| this.bindins.forEach(binding => { | |
| binding.unbind() | |
| }) | |
| } | |
| ViewModel.binders = { | |
| value: { | |
| bind(el) { | |
| el.addEventListener('change', this.update) | |
| }, | |
| sync(el, value) { | |
| if(el.type === 'checkbox') { | |
| el.checked = !!value | |
| } else { | |
| el.value = value | |
| } | |
| }, | |
| value(el) { | |
| if(el.type === 'checkbox') { | |
| return el.checked | |
| } else { | |
| return el.value | |
| } | |
| } | |
| }, | |
| html: { | |
| sync(el, value) { | |
| el.innerHTML = value | |
| } | |
| }, | |
| show: { | |
| priority: 2000, | |
| sync(el, value) { | |
| el.style.display = value ? '' : 'none' | |
| } | |
| }, | |
| on: { | |
| bind(el) { | |
| el.addEventListener(this.args[0], function() { | |
| if(this.vm.method && this.vm.method[this.key]) { | |
| this.vm.method[this.key].call(this.vm) | |
| } | |
| }) | |
| } | |
| }, | |
| '*': { | |
| sync(el, value) { | |
| if(defined(value)) { | |
| el.setAttribute(this.args[0], value) | |
| } else { | |
| el.removeAttribute(this.args[0]) | |
| } | |
| } | |
| } | |
| } | |
| ;function watch(obj, prop, callback) { | |
| if(!callback) { | |
| callback = prop | |
| prop = obj | |
| obj = this | |
| } | |
| var value = obj[prop] | |
| var callbacks = obj.$$callbacks = obj.$$callbacks || {} | |
| var propCallbacks = callbacks[prop] = callbacks[prop] || [] | |
| Object.defineProperty(obj, prop, { | |
| get: function(){ | |
| return value | |
| }, | |
| set: function(newValue){ | |
| if(newValue !== value) { | |
| value = newValue | |
| propCallbacks.forEach(function(cb) { | |
| cb() | |
| }) | |
| } | |
| } | |
| }) | |
| if(propCallbacks.indexOf(callback) === -1) { | |
| propCallbacks.push(callback) | |
| } | |
| return function() { | |
| var index = propCallbacks.indexOf(callback) | |
| propCallbacks.splice(index, 1) | |
| } | |
| } | |
| })() |
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