batchChangeTiming.jsx

//Script used for batch change timing of selected compositions
//or actve comp with all layers
//It basically adjusts outPoints of all layers and precomps

//0.1 - initial release
//0.2 - code cleanup, true recursive function
//0.3 - minor update
//0.31 - fixed improper behavior with shorter than comp layers
//0.4 - now you can increase (+) or decrease (-) comp duration

//CC-BY-SA, Nik Ska, 2013-2014
//http://aescripts.com/authors/m-p/nik-ska/


var chTiming = this;
chTiming.version = 0.4;
chTiming.scriptTitle = "Batch Timing Changer";

chTiming.run = function(){
    this.buildGUI(this);
}

chTiming.buildGUI = function(thisObj){
	thisObj.w = (thisObj instanceof Panel) ? thisObj : new Window("palette", thisObj.scriptTitle, undefined, {resizeable:true});
	thisObj.w.alignChildren = ['left', 'top']
	var g = thisObj.w.add("group{orientation:'row', alignChildren: ['left', 'top']}");
	var timeText = g.add("editText", undefined, "0");
	timeText.size = [80, 25];
	var modeselect = g.add("dropdownlist", undefined, ["s", "fr"]);
	modeselect.selection = 0;
	modeselect.size = [42, 25];
	var recursiveMode = thisObj.w.add("checkbox", undefined, "Recursive");
	recursiveMode.value = true;

	thisObj.newTime = 0;
	thisObj.sign = 0;
    
	timeText.update = function(){
		if(this.text[0]=="-"){
			thisObj.sign = -1;
		}
		else if(this.text[0]=='+'){
			thisObj.sign = 1;
		}
		else thisObj.sign = 0;

		thisObj.newTime = Number(this.text.substr(Math.abs(thisObj.sign),this.text.length));
	}
	
	timeText.onChanging = function(){
		preFilter = /[+-]?([0-9\:]*)/; //this one does not allow to input anything but numbers and some symbols;
		this.text = this.text.match(preFilter)[0];

		/*
		if(modeselect.selection.index == 0){
			var newtxt = this.text.replace(/\:/g, '');
			this.text = newtxt.replace(/(\d)(?=(\d\d)+$)/g, '$1:'); //separate with :
			// str.replace(/(?=(\d\d)+($))/g, '$1:');
		}
		*/
	}


	timeText.onEnterKey = function(){
		timeText.update();
		thisObj.changeTiming(thisObj, thisObj.newTime, thisObj.sign, modeselect.selection.index, recursiveMode.value);
	}

	if (thisObj.w instanceof Window){
	    thisObj.w.center();
	    thisObj.w.show();
	}
	else thisObj.w.layout.layout(true);
}

chTiming.changeTiming = function(thisObj, _time, sign, _sel, recursive){
	//_time is a new time for a comp
	//sign is a sign for additional time. -1 for decrease, 0 for change, 1 for increase
	//_sel is selection type, 0 for frames, 1 for seconds

	function loopthrough(compToChange, _newDuration){
    	//first - loop through compositions
    	for(var i = 0; i<compToChange.length; i++){
			//now loop through comp's layers
			for(var k = 1; k<=compToChange[i].layers.length; k++){
				var layerToChange = compToChange[i].layers[k];
				if(_newDuration>layerToChange.inPoint && layerToChange.outPoint>=compToChange[i].duration){
					layerToChange.outPoint = _newDuration;
				
					if((layerToChange.source instanceof CompItem) && recursive){
						//if the layer we stumble upon is a comp - go deeper
						loopthrough([layerToChange.source], _newDuration-layerToChange.inPoint);
						layerToChange.outPoint = _newDuration;
					}
				}
			}
			compToChange[i].duration = _newDuration;
		}
    }
    
	var selComps = app.project.selection;
	var activeComp = app.project.activeItem;

	if(activeComp && activeComp instanceof CompItem){
	//if we are in a comp
		var comps = [app.project.activeItem];
	}
	else if(selComps.length>0){
		var comps = selComps;
	}

	if(_sel == 1) _time*=selComps[0].frameDuration //frames

	if(sign){
		//if there is some time involved
		if(activeComp.duration+_time*thisObj.sign <= 0){
			alert("Composition can't be shorter than 0")
		}
		else{
	        _time = activeComp.duration+_time*thisObj.sign;
		}
	}

	app.beginUndoGroup("Change timing");
	loopthrough(comps, _time);
	app.endUndoGroup();
}

chTiming.run()