575 lines
16 KiB
JavaScript
575 lines
16 KiB
JavaScript
/*
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Copyright (c) 2004-2006, The Dojo Foundation
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All Rights Reserved.
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Licensed under the Academic Free License version 2.1 or above OR the
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modified BSD license. For more information on Dojo licensing, see:
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http://dojotoolkit.org/community/licensing.shtml
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*/
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dojo.provide("dojo.event");
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dojo.require("dojo.lang.array");
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dojo.require("dojo.lang.extras");
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dojo.require("dojo.lang.func");
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dojo.event = new function(){
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this.canTimeout = dojo.lang.isFunction(dj_global["setTimeout"])||dojo.lang.isAlien(dj_global["setTimeout"]);
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// FIXME: where should we put this method (not here!)?
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function interpolateArgs(args, searchForNames){
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var dl = dojo.lang;
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var ao = {
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srcObj: dj_global,
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srcFunc: null,
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adviceObj: dj_global,
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adviceFunc: null,
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aroundObj: null,
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aroundFunc: null,
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adviceType: (args.length>2) ? args[0] : "after",
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precedence: "last",
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once: false,
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delay: null,
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rate: 0,
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adviceMsg: false
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};
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switch(args.length){
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case 0: return;
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case 1: return;
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case 2:
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ao.srcFunc = args[0];
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ao.adviceFunc = args[1];
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break;
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case 3:
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if((dl.isObject(args[0]))&&(dl.isString(args[1]))&&(dl.isString(args[2]))){
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ao.adviceType = "after";
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ao.srcObj = args[0];
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ao.srcFunc = args[1];
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ao.adviceFunc = args[2];
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}else if((dl.isString(args[1]))&&(dl.isString(args[2]))){
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ao.srcFunc = args[1];
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ao.adviceFunc = args[2];
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}else if((dl.isObject(args[0]))&&(dl.isString(args[1]))&&(dl.isFunction(args[2]))){
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ao.adviceType = "after";
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ao.srcObj = args[0];
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ao.srcFunc = args[1];
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var tmpName = dl.nameAnonFunc(args[2], ao.adviceObj, searchForNames);
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ao.adviceFunc = tmpName;
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}else if((dl.isFunction(args[0]))&&(dl.isObject(args[1]))&&(dl.isString(args[2]))){
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ao.adviceType = "after";
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ao.srcObj = dj_global;
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var tmpName = dl.nameAnonFunc(args[0], ao.srcObj, searchForNames);
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ao.srcFunc = tmpName;
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ao.adviceObj = args[1];
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ao.adviceFunc = args[2];
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}
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break;
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case 4:
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if((dl.isObject(args[0]))&&(dl.isObject(args[2]))){
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// we can assume that we've got an old-style "connect" from
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// the sigslot school of event attachment. We therefore
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// assume after-advice.
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ao.adviceType = "after";
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ao.srcObj = args[0];
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ao.srcFunc = args[1];
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ao.adviceObj = args[2];
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ao.adviceFunc = args[3];
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}else if((dl.isString(args[0]))&&(dl.isString(args[1]))&&(dl.isObject(args[2]))){
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ao.adviceType = args[0];
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ao.srcObj = dj_global;
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ao.srcFunc = args[1];
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ao.adviceObj = args[2];
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ao.adviceFunc = args[3];
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}else if((dl.isString(args[0]))&&(dl.isFunction(args[1]))&&(dl.isObject(args[2]))){
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ao.adviceType = args[0];
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ao.srcObj = dj_global;
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var tmpName = dl.nameAnonFunc(args[1], dj_global, searchForNames);
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ao.srcFunc = tmpName;
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ao.adviceObj = args[2];
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ao.adviceFunc = args[3];
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}else if((dl.isString(args[0]))&&(dl.isObject(args[1]))&&(dl.isString(args[2]))&&(dl.isFunction(args[3]))){
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ao.srcObj = args[1];
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ao.srcFunc = args[2];
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var tmpName = dl.nameAnonFunc(args[3], dj_global, searchForNames);
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ao.adviceObj = dj_global;
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ao.adviceFunc = tmpName;
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}else if(dl.isObject(args[1])){
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ao.srcObj = args[1];
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ao.srcFunc = args[2];
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ao.adviceObj = dj_global;
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ao.adviceFunc = args[3];
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}else if(dl.isObject(args[2])){
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ao.srcObj = dj_global;
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ao.srcFunc = args[1];
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ao.adviceObj = args[2];
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ao.adviceFunc = args[3];
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}else{
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ao.srcObj = ao.adviceObj = ao.aroundObj = dj_global;
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ao.srcFunc = args[1];
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ao.adviceFunc = args[2];
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ao.aroundFunc = args[3];
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}
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break;
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case 6:
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ao.srcObj = args[1];
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ao.srcFunc = args[2];
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ao.adviceObj = args[3]
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ao.adviceFunc = args[4];
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ao.aroundFunc = args[5];
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ao.aroundObj = dj_global;
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break;
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default:
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ao.srcObj = args[1];
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ao.srcFunc = args[2];
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ao.adviceObj = args[3]
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ao.adviceFunc = args[4];
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ao.aroundObj = args[5];
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ao.aroundFunc = args[6];
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ao.once = args[7];
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ao.delay = args[8];
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ao.rate = args[9];
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ao.adviceMsg = args[10];
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break;
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}
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if(dl.isFunction(ao.aroundFunc)){
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var tmpName = dl.nameAnonFunc(ao.aroundFunc, ao.aroundObj, searchForNames);
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ao.aroundFunc = tmpName;
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}
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if(dl.isFunction(ao.srcFunc)){
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ao.srcFunc = dl.getNameInObj(ao.srcObj, ao.srcFunc);
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}
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if(dl.isFunction(ao.adviceFunc)){
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ao.adviceFunc = dl.getNameInObj(ao.adviceObj, ao.adviceFunc);
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}
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if((ao.aroundObj)&&(dl.isFunction(ao.aroundFunc))){
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ao.aroundFunc = dl.getNameInObj(ao.aroundObj, ao.aroundFunc);
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}
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if(!ao.srcObj){
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dojo.raise("bad srcObj for srcFunc: "+ao.srcFunc);
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}
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if(!ao.adviceObj){
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dojo.raise("bad adviceObj for adviceFunc: "+ao.adviceFunc);
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}
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return ao;
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}
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this.connect = function(){
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if(arguments.length == 1){
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var ao = arguments[0];
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}else{
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var ao = interpolateArgs(arguments, true);
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}
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if(dojo.lang.isArray(ao.srcObj) && ao.srcObj!=""){
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var tmpAO = {};
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for(var x in ao){
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tmpAO[x] = ao[x];
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}
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var mjps = [];
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dojo.lang.forEach(ao.srcObj, function(src){
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if((dojo.render.html.capable)&&(dojo.lang.isString(src))){
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src = dojo.byId(src);
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// dojo.debug(src);
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}
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tmpAO.srcObj = src;
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// dojo.debug(tmpAO.srcObj, tmpAO.srcFunc);
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// dojo.debug(tmpAO.adviceObj, tmpAO.adviceFunc);
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mjps.push(dojo.event.connect.call(dojo.event, tmpAO));
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});
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return mjps;
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}
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// FIXME: just doing a "getForMethod()" seems to be enough to put this into infinite recursion!!
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var mjp = dojo.event.MethodJoinPoint.getForMethod(ao.srcObj, ao.srcFunc);
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if(ao.adviceFunc){
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var mjp2 = dojo.event.MethodJoinPoint.getForMethod(ao.adviceObj, ao.adviceFunc);
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}
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mjp.kwAddAdvice(ao);
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return mjp; // advanced users might want to fsck w/ the join point
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// manually
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}
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this.log = function(a1, a2){
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var kwArgs;
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if((arguments.length == 1)&&(typeof a1 == "object")){
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kwArgs = a1;
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}else{
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kwArgs = {
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srcObj: a1,
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srcFunc: a2
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};
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}
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kwArgs.adviceFunc = function(){
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var argsStr = [];
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for(var x=0; x<arguments.length; x++){
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argsStr.push(arguments[x]);
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}
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dojo.debug("("+kwArgs.srcObj+")."+kwArgs.srcFunc, ":", argsStr.join(", "));
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}
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this.kwConnect(kwArgs);
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}
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this.connectBefore = function(){
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var args = ["before"];
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for(var i = 0; i < arguments.length; i++) { args.push(arguments[i]); }
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return this.connect.apply(this, args);
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}
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this.connectAround = function(){
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var args = ["around"];
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for(var i = 0; i < arguments.length; i++) { args.push(arguments[i]); }
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return this.connect.apply(this, args);
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}
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this.connectOnce = function(){
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var ao = interpolateArgs(arguments, true);
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ao.once = true;
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return this.connect(ao);
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}
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this._kwConnectImpl = function(kwArgs, disconnect){
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var fn = (disconnect) ? "disconnect" : "connect";
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if(typeof kwArgs["srcFunc"] == "function"){
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kwArgs.srcObj = kwArgs["srcObj"]||dj_global;
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var tmpName = dojo.lang.nameAnonFunc(kwArgs.srcFunc, kwArgs.srcObj, true);
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kwArgs.srcFunc = tmpName;
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}
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if(typeof kwArgs["adviceFunc"] == "function"){
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kwArgs.adviceObj = kwArgs["adviceObj"]||dj_global;
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var tmpName = dojo.lang.nameAnonFunc(kwArgs.adviceFunc, kwArgs.adviceObj, true);
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kwArgs.adviceFunc = tmpName;
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}
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return dojo.event[fn]( (kwArgs["type"]||kwArgs["adviceType"]||"after"),
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kwArgs["srcObj"]||dj_global,
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kwArgs["srcFunc"],
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kwArgs["adviceObj"]||kwArgs["targetObj"]||dj_global,
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kwArgs["adviceFunc"]||kwArgs["targetFunc"],
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kwArgs["aroundObj"],
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kwArgs["aroundFunc"],
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kwArgs["once"],
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kwArgs["delay"],
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kwArgs["rate"],
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kwArgs["adviceMsg"]||false );
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}
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this.kwConnect = function(kwArgs){
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return this._kwConnectImpl(kwArgs, false);
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}
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this.disconnect = function(){
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var ao = interpolateArgs(arguments, true);
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if(!ao.adviceFunc){ return; } // nothing to disconnect
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var mjp = dojo.event.MethodJoinPoint.getForMethod(ao.srcObj, ao.srcFunc);
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return mjp.removeAdvice(ao.adviceObj, ao.adviceFunc, ao.adviceType, ao.once);
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}
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this.kwDisconnect = function(kwArgs){
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return this._kwConnectImpl(kwArgs, true);
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}
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}
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// exactly one of these is created whenever a method with a joint point is run,
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// if there is at least one 'around' advice.
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dojo.event.MethodInvocation = function(join_point, obj, args) {
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this.jp_ = join_point;
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this.object = obj;
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this.args = [];
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for(var x=0; x<args.length; x++){
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this.args[x] = args[x];
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}
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// the index of the 'around' that is currently being executed.
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this.around_index = -1;
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}
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dojo.event.MethodInvocation.prototype.proceed = function() {
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this.around_index++;
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if(this.around_index >= this.jp_.around.length){
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return this.jp_.object[this.jp_.methodname].apply(this.jp_.object, this.args);
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// return this.jp_.run_before_after(this.object, this.args);
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}else{
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var ti = this.jp_.around[this.around_index];
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var mobj = ti[0]||dj_global;
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var meth = ti[1];
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return mobj[meth].call(mobj, this);
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}
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}
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dojo.event.MethodJoinPoint = function(obj, methname){
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this.object = obj||dj_global;
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this.methodname = methname;
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this.methodfunc = this.object[methname];
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this.before = [];
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this.after = [];
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this.around = [];
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}
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dojo.event.MethodJoinPoint.getForMethod = function(obj, methname) {
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// if(!(methname in obj)){
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if(!obj){ obj = dj_global; }
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if(!obj[methname]){
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// supply a do-nothing method implementation
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obj[methname] = function(){};
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if(!obj[methname]){
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// e.g. cannot add to inbuilt objects in IE6
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dojo.raise("Cannot set do-nothing method on that object "+methname);
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}
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}else if((!dojo.lang.isFunction(obj[methname]))&&(!dojo.lang.isAlien(obj[methname]))){
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return null; // FIXME: should we throw an exception here instead?
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}
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// we hide our joinpoint instance in obj[methname + '$joinpoint']
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var jpname = methname + "$joinpoint";
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var jpfuncname = methname + "$joinpoint$method";
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var joinpoint = obj[jpname];
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if(!joinpoint){
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var isNode = false;
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if(dojo.event["browser"]){
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if( (obj["attachEvent"])||
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(obj["nodeType"])||
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(obj["addEventListener"]) ){
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isNode = true;
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dojo.event.browser.addClobberNodeAttrs(obj, [jpname, jpfuncname, methname]);
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}
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}
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var origArity = obj[methname].length;
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obj[jpfuncname] = obj[methname];
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// joinpoint = obj[jpname] = new dojo.event.MethodJoinPoint(obj, methname);
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joinpoint = obj[jpname] = new dojo.event.MethodJoinPoint(obj, jpfuncname);
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obj[methname] = function(){
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var args = [];
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if((isNode)&&(!arguments.length)){
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var evt = null;
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try{
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if(obj.ownerDocument){
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evt = obj.ownerDocument.parentWindow.event;
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}else if(obj.documentElement){
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evt = obj.documentElement.ownerDocument.parentWindow.event;
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}else{
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evt = window.event;
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}
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}catch(e){
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evt = window.event;
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}
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if(evt){
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args.push(dojo.event.browser.fixEvent(evt, this));
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}
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}else{
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for(var x=0; x<arguments.length; x++){
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if((x==0)&&(isNode)&&(dojo.event.browser.isEvent(arguments[x]))){
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args.push(dojo.event.browser.fixEvent(arguments[x], this));
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}else{
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args.push(arguments[x]);
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}
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}
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}
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// return joinpoint.run.apply(joinpoint, arguments);
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return joinpoint.run.apply(joinpoint, args);
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}
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obj[methname].__preJoinArity = origArity;
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}
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return joinpoint;
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}
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dojo.lang.extend(dojo.event.MethodJoinPoint, {
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unintercept: function(){
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this.object[this.methodname] = this.methodfunc;
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this.before = [];
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this.after = [];
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this.around = [];
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},
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disconnect: dojo.lang.forward("unintercept"),
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run: function() {
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var obj = this.object||dj_global;
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var args = arguments;
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// optimization. We only compute once the array version of the arguments
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// pseudo-arr in order to prevent building it each time advice is unrolled.
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var aargs = [];
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for(var x=0; x<args.length; x++){
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aargs[x] = args[x];
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}
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var unrollAdvice = function(marr){
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if(!marr){
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dojo.debug("Null argument to unrollAdvice()");
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return;
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}
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var callObj = marr[0]||dj_global;
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var callFunc = marr[1];
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if(!callObj[callFunc]){
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dojo.raise("function \"" + callFunc + "\" does not exist on \"" + callObj + "\"");
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}
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var aroundObj = marr[2]||dj_global;
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var aroundFunc = marr[3];
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var msg = marr[6];
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var undef;
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var to = {
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args: [],
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jp_: this,
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object: obj,
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proceed: function(){
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return callObj[callFunc].apply(callObj, to.args);
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}
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};
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to.args = aargs;
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var delay = parseInt(marr[4]);
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var hasDelay = ((!isNaN(delay))&&(marr[4]!==null)&&(typeof marr[4] != "undefined"));
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if(marr[5]){
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var rate = parseInt(marr[5]);
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var cur = new Date();
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var timerSet = false;
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if((marr["last"])&&((cur-marr.last)<=rate)){
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if(dojo.event.canTimeout){
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if(marr["delayTimer"]){
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clearTimeout(marr.delayTimer);
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}
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var tod = parseInt(rate*2); // is rate*2 naive?
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var mcpy = dojo.lang.shallowCopy(marr);
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marr.delayTimer = setTimeout(function(){
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// FIXME: on IE at least, event objects from the
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// browser can go out of scope. How (or should?) we
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// deal with it?
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mcpy[5] = 0;
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unrollAdvice(mcpy);
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}, tod);
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}
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return;
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}else{
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marr.last = cur;
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}
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}
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// FIXME: need to enforce rates for a connection here!
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if(aroundFunc){
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// NOTE: around advice can't delay since we might otherwise depend
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// on execution order!
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aroundObj[aroundFunc].call(aroundObj, to);
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}else{
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// var tmjp = dojo.event.MethodJoinPoint.getForMethod(obj, methname);
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if((hasDelay)&&((dojo.render.html)||(dojo.render.svg))){ // FIXME: the render checks are grotty!
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dj_global["setTimeout"](function(){
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if(msg){
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callObj[callFunc].call(callObj, to);
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}else{
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callObj[callFunc].apply(callObj, args);
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}
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}, delay);
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}else{ // many environments can't support delay!
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if(msg){
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callObj[callFunc].call(callObj, to);
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}else{
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callObj[callFunc].apply(callObj, args);
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}
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}
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}
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}
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if(this.before.length>0){
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dojo.lang.forEach(this.before, unrollAdvice);
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}
|
|
|
|
var result;
|
|
if(this.around.length>0){
|
|
var mi = new dojo.event.MethodInvocation(this, obj, args);
|
|
result = mi.proceed();
|
|
}else if(this.methodfunc){
|
|
result = this.object[this.methodname].apply(this.object, args);
|
|
}
|
|
|
|
if(this.after.length>0){
|
|
dojo.lang.forEach(this.after, unrollAdvice);
|
|
}
|
|
|
|
return (this.methodfunc) ? result : null;
|
|
},
|
|
|
|
getArr: function(kind){
|
|
var arr = this.after;
|
|
// FIXME: we should be able to do this through props or Array.in()
|
|
if((typeof kind == "string")&&(kind.indexOf("before")!=-1)){
|
|
arr = this.before;
|
|
}else if(kind=="around"){
|
|
arr = this.around;
|
|
}
|
|
return arr;
|
|
},
|
|
|
|
kwAddAdvice: function(args){
|
|
this.addAdvice( args["adviceObj"], args["adviceFunc"],
|
|
args["aroundObj"], args["aroundFunc"],
|
|
args["adviceType"], args["precedence"],
|
|
args["once"], args["delay"], args["rate"],
|
|
args["adviceMsg"]);
|
|
},
|
|
|
|
addAdvice: function( thisAdviceObj, thisAdvice,
|
|
thisAroundObj, thisAround,
|
|
advice_kind, precedence,
|
|
once, delay, rate, asMessage){
|
|
var arr = this.getArr(advice_kind);
|
|
if(!arr){
|
|
dojo.raise("bad this: " + this);
|
|
}
|
|
|
|
var ao = [thisAdviceObj, thisAdvice, thisAroundObj, thisAround, delay, rate, asMessage];
|
|
|
|
if(once){
|
|
if(this.hasAdvice(thisAdviceObj, thisAdvice, advice_kind, arr) >= 0){
|
|
return;
|
|
}
|
|
}
|
|
|
|
if(precedence == "first"){
|
|
arr.unshift(ao);
|
|
}else{
|
|
arr.push(ao);
|
|
}
|
|
},
|
|
|
|
hasAdvice: function(thisAdviceObj, thisAdvice, advice_kind, arr){
|
|
if(!arr){ arr = this.getArr(advice_kind); }
|
|
var ind = -1;
|
|
for(var x=0; x<arr.length; x++){
|
|
var aao = (typeof thisAdvice == "object") ? (new String(thisAdvice)).toString() : thisAdvice;
|
|
var a1o = (typeof arr[x][1] == "object") ? (new String(arr[x][1])).toString() : arr[x][1];
|
|
if((arr[x][0] == thisAdviceObj)&&(a1o == aao)){
|
|
ind = x;
|
|
}
|
|
}
|
|
return ind;
|
|
},
|
|
|
|
removeAdvice: function(thisAdviceObj, thisAdvice, advice_kind, once){
|
|
var arr = this.getArr(advice_kind);
|
|
var ind = this.hasAdvice(thisAdviceObj, thisAdvice, advice_kind, arr);
|
|
if(ind == -1){
|
|
return false;
|
|
}
|
|
while(ind != -1){
|
|
arr.splice(ind, 1);
|
|
if(once){ break; }
|
|
ind = this.hasAdvice(thisAdviceObj, thisAdvice, advice_kind, arr);
|
|
}
|
|
return true;
|
|
}
|
|
});
|