Script to show/hide some layers

[Xavier Gomez]

Yes it’s possible, scripts are designed exactly for this kind of things.
You need to loop throw all project items, identify those that are compositions, then for each comp loop again over all layers, and do your stuff with each layer.
You can try this (on a test project…):

var LANG_KEYS = "_EN,_DE,_FR,_IT";
//
function handleLayer(layer, lang_identifier){
var str = layer.name.slice(-3);
if (LANG_KEYS.indexOf(str)<=0){
// layer is localized: switch on or off
layer.enabled = (str===lang_identifier);
}
else{
// layer not localized: do nothing
};
};
function handleProject(lang_identifier){
var M = app.project.numItems, m, comp;
var N, n, layer;

for (m=1; m<=M; m++){
comp = app.project.item(m);
if (comp.typeName!=="Composition") continue;
N = comp.numLayers;
for (n=1; n<=N; n++){
layer = comp.layer(n);
handleLayer(layer, lang_identifier);
};
};
};
// UI
var win = new Window("palette", "script name");
win.alignChildren = ['fill', 'top'];
win.spacing = 5;
var keyMENU = win.add("dropdownlist", undefined, LANG_KEYS.split(","));
var runBTN = win.add("button", undefined, "go");
keyMENU.selection = 0;
runBTN.onClick = function(){handleProject(keyMENU.selection.text);};
win.show();

Xavier

[Herby Herve]

Thanks Xavier. This helps a lot.
In the meantime, I’ve found this page where I found a lot of help as well: https://leemscripts.tumblr.com/
The last script on the page (enable 3d switches for an entire hierarchy) is quite similar to what I want to do.

More than enough to start this script. I’ll post news here…

[Herby Herve]

Got it!!
I paste the script below.
I’m pretty sure that this script can be improved but it already does the job…

function hideLayer (layer, selectedLanguage){
// Hide/Show layers according to the last 2 digits of layer's name
if (layer.hasVideo && selectedLanguage == "All" || layer.name.slice(-2) == selectedLanguage){layer.enabled = true};
else {layer.enabled = false};
if (layer.hasAudio && selectedLanguage == "All" || layer.name.slice(-2) == selectedLanguage){layer.audioEnabled = true};
else {layer.audioEnabled = false};
// For layers used both in EN & FR version
if (layer.name.slice(-5) == "EN/FR" && selectedLanguage == "EN" && layer.hasVideo){layer.enabled = true};
if (layer.name.slice(-5) == "EN/FR" && selectedLanguage == "EN" && layer.hasAudio){layer.audioEnabled = true};
if (layer.name.slice(-5) == "EN/FR" && selectedLanguage == "CH" && layer.hasVideo){layer.enabled = false};
if (layer.name.slice(-5) == "EN/FR" && selectedLanguage == "CH" && layer.hasAudio){layer.audioEnabled = false};
};
// Scan all layers
function goThroughLayers (Comp, selectedLanguage){
for (var p = 1; p <= Comp.numLayers; p++){
// Check if layer needs to be modified
if(Comp.layer(p).name.slice(-2) == "EN" || Comp.layer(p).name.slice(-2) == "FR" || Comp.layer(p).name.slice(-2) == "CH"){
hideLayer(Comp.layer(p), selectedLanguage);
};
};
};

//UI
var w =new Window ("dialog","Select language");
w.orientation="column";
var radio_group = w.add ("panel");
radio_group.orientation="row";
radio_group.alignChildren ="center";
radio_group.add ("radiobutton", undefined, "EN");
radio_group.add ("radiobutton", undefined, "FR");
radio_group.add ("radiobutton", undefined, "CH");
radio_group.add ("radiobutton", undefined, "All");
var button_group = w.add ("group");
button_group.orientation="row";
button_group.alignChildren ="center";
button_group.add ("button", undefined, "Cancel");
button_group.add ("button", undefined, "OK");

// set dialog defaults
radio_group.children[0].value =true;

if(w.show ()== 1){
// Get selected language
for(var x = 0; x < radio_group.children.length; x++){
if(radio_group.children[x].value ==true){var selectedLanguage = (radio_group.children[x].text)};
};

app.beginUndoGroup("Language selection");

// Search for all Compositions in the project
for (var i = 1; i <= app.project.numItems; i++) {
if (app.project.item(i) instanceof CompItem) {
var Comp = app.project.item(i);
goThroughLayers(Comp, selectedLanguage);
}
}
app.endUndoGroup();
};