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animation.js
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animation.js
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var // packages
_ = require("../util"),
animate = require("../helper/animate"),
dom = require("../dom"),
Regular = require("../render/client");
var // variables
rClassName = /^[-\w]+(\s[-\w]+)*$/,
rCommaSep = /[\r\n\f ]*,[\r\n\f ]*(?=\w+\:)/, // dont split comma in Expression
rStyles = /^\{.*\}$/, // for Simpilfy
rSpace = /\s+/, // for Simpilfy
WHEN_COMMAND = "when",
EVENT_COMMAND = "on",
THEN_COMMAND = "then";
/**
* Animation Plugin
* @param {Component} Component
*/
function createSeed(type){
var steps = [], current = 0, callback = _.noop;
var key;
var out = {
type: type,
start: function(cb){
key = _.uid();
if(typeof cb === "function") callback = cb;
if(current> 0 ){
current = 0 ;
}else{
out.step();
}
return out.compelete;
},
compelete: function(){
key = null;
callback && callback();
callback = _.noop;
current = 0;
},
step: function(){
if(steps[current]) steps[current ]( out.done.bind(out, key) );
},
done: function(pkey){
if(pkey !== key) return; // means the loop is down
if( current < steps.length - 1 ) {
current++;
out.step();
}else{
out.compelete();
}
},
push: function(step){
steps.push(step)
}
}
return out;
}
Regular._addProtoInheritCache("animation")
// builtin animation
Regular.animation({
"wait": function( step ){
var timeout = parseInt( step.param ) || 0
return function(done){
// _.log("delay " + timeout)
setTimeout( done, timeout );
}
},
"class": function(step){
var tmp = step.param.split(","),
className = tmp[0] || "",
mode = parseInt(tmp[1]) || 1;
return function(done){
// _.log(className)
animate.startClassAnimate( step.element, className , done, mode );
}
},
"call": function(step){
var fn = this.$expression(step.param).get, self = this;
return function(done){
// _.log(step.param, 'call')
fn(self);
self.$update();
done()
}
},
"emit": function(step){
var param = step.param;
var tmp = param.split(","),
evt = tmp[0] || "",
args = tmp[1]? this.$expression(tmp[1]).get: null;
if(!evt) throw Error("you shoud specified a eventname in emit command");
var self = this;
return function(done){
self.$emit(evt, args? args(self) : undefined);
done();
}
},
// style: left {10}px,
style: function(step){
var styles = {},
param = step.param,
pairs = param.split(","), valid;
pairs.forEach(function(pair){
pair = pair.trim();
if(pair){
var tmp = pair.split( rSpace ),
name = tmp.shift(),
value = tmp.join(" ");
if( !name || !value ) throw Error("invalid style in command: style");
styles[name] = value;
valid = true;
}
})
return function(done){
if(valid){
animate.startStyleAnimate(step.element, styles, done);
}else{
done();
}
}
}
})
// hancdle the r-animation directive
// el : the element to process
// value: the directive value
function processAnimate( element, value ){
var Component = this.constructor;
if(_.isExpr(value)){
value = value.get(this);
}
value = value.trim();
var composites = value.split(";"),
composite, context = this, seeds = [], seed, destroies = [], destroy,
command, param , current = 0, tmp, animator, self = this;
function reset( type ){
seed && seeds.push( seed )
seed = createSeed( type );
}
function whenCallback(start, value){
if( !!value ) start()
}
function animationDestroy(element){
return function(){
element.onenter = null;
element.onleave = null;
}
}
for( var i = 0, len = composites.length; i < len; i++ ){
composite = composites[i];
tmp = composite.split(":");
command = tmp[0] && tmp[0].trim();
param = tmp[1] && tmp[1].trim();
if( !command ) continue;
if( command === WHEN_COMMAND ){
reset("when");
this.$watch(param, whenCallback.bind( this, seed.start ) );
continue;
}
if( command === EVENT_COMMAND){
reset(param);
if( param === "leave" ){
element.onleave = seed.start;
destroies.push( animationDestroy(element) );
}else if( param === "enter" ){
element.onenter = seed.start;
destroies.push( animationDestroy(element) );
}else{
if( ("on" + param) in element){ // if dom have the event , we use dom event
destroies.push(this._handleEvent( element, param, seed.start ));
}else{ // otherwise, we use component event
this.$on(param, seed.start);
destroies.push(this.$off.bind(this, param, seed.start));
}
}
continue;
}
var animator = Component.animation(command)
if( animator && seed ){
seed.push(
animator.call(this,{
element: element,
done: seed.done,
param: param
})
)
}else{
throw Error( animator? "you should start with `on` or `event` in animation" : ("undefined animator 【" + command +"】" ));
}
}
if(destroies.length){
return function(){
destroies.forEach(function(destroy){
destroy();
})
}
}
}
Regular.directive( "r-animation", processAnimate)
Regular.directive( "r-anim", processAnimate)