Photoshop layer related concepts layercomp layers move rotate duplicate layer compound layer

1. brief introduction

  Photoshop Layers are stacked like transparent paper . Include other elements through layers , You can move layers to move the entire layer .

2. Layer related concepts

2.1.LayerComp

   Snapshot of the layer state in the document , It can be used to view different page layouts or compositions . adopt Document.layerComps Collection access . You can access layer composition by name . for example , This is called myLayerComp Of LayerComp Object set comment Property value ：

var layercompRef = app.activeDocument.layerComps.getByName("myLayerComp");
layercompRef.comment = "View from shoreline";

2.2.LayerComps

   In the document LayerComp A collection of objects . adopt Document.layerComps Collection property access . for example ：

app.activeDocument.layerComps.add("myLayerComp", "View from Shoreline",
true, true, true);

2.3.Layers

   A collection of layer objects in a document , Include ArtLayer and LayerSet object . By visiting Document.layers or LayerSet.layers Set attribute . for example , This use length Property to calculate the number of layer objects in the active document , Then display the numbers on the screen ：

var layerNum = app.activeDocument.layers.length
alert(layerNum)

2.4.LayerSet

   A set of layer objects , Can include ArtLayer Objects and others （ Nested ）LayerSet object . A single command can manipulate all the layers in the collection . adopt Document.layerSets Set to access the top-level layer set in the document . You can access layer sets by name . for example , The following settings “myLayerSet” Of allLocked value ：

var layerSetRef = app.activeDocument.layerSets.getByName("myLayerSet");
layerSetRef.allLocked = true

   Through... In the parent set LayerSet.layerSets Set access nested level set . for example ：

app.activeDocument.layerSets[0].layerSets[0];

2.5.LayerSets

   In the document LayerSet A collection of objects . adopt Document.layerSets Set properties access the top-level layer set in the document . for example ：

var layerSetRef = app.activeDocument.layerSets.add()

   Through... In the parent set LayerSet.layerSets Set properties access nested sets . for example ：

var layerSetRef = app.activeDocument.layerSets.getByName("myParentSet");
var childSet = layerSetRef.layerSets.getByName("myChildSet");

3. Example

3.1. Set the active layer

   Set the active layer as the last art layer of the active document .

app.bringToFront();

if (app.documents.length == 0)
{
    
    var docRef = app.documents.add();
}
else
{
    
    var docRef = app.activeDocument;
}

if (docRef.layers.length < 2)
{
    
    docRef.artLayers.add();
}

var activeLayerName = docRef.activeLayer.name;
var setLayerName = "";
if (docRef.activeLayer.name != app.activeDocument.layers[docRef.layers.length - 1].name)
{
    
    docRef.activeLayer = docRef.layers[docRef.layers.length - 1];
}
else
{
    
    docRef.activeLayer = docRef.layers[0];
}
docRef = null;

3.2. Set layer styles

   This script demonstrates how to apply styles to layers .

// in case we double clicked the file
app.bringToFront();

$.localize = true;
var strStyleDefaultPuzzleImage = localize( "$$$/Presets/Styles/DefaultStyles_asl/PuzzleImage=Puzzle (Image)" );
var strtRulerUnits = app.preferences.rulerUnits;
if (strtRulerUnits != Units.PIXELS)
{
    
    app.preferences.rulerUnits = Units.PIXELS;
}

if (app.documents.length == 0)
{
    
    var docRef = app.documents.add(320, 240, 72, null, NewDocumentMode.RGB, DocumentFill.WHITE);
}
else
{
    
    var docRef = app.activeDocument;
}

//  Make sure  activeLayer  Not a background layer , So that we can apply styles to it 
docRef.activeLayer.isBackgroundLayer = false;
docRef.artLayers[0].applyStyle(strStyleDefaultPuzzleImage);
docRef = null;

if (strtRulerUnits != Units.PIXELS)
{
    
    app.preferences.rulerUnits = strtRulerUnits;
}

3.3. Copy move layer

   This script demonstrates how to copy and move layers .

if (!app.documents.length > 0)      // Create a new document if the document does not exist 
{
    
    var strtRulerUnits = app.preferences.rulerUnits;
    app.preferences.rulerUnits = Units.PIXELS;
    var docRef = app.documents.add(320, 240, 72, null, NewDocumentMode.RGB, DocumentFill.WHITE);
    app.preferences.rulerUnits = strtRulerUnits;
}

var docRef = app.activeDocument;
var layerSetRef = docRef.layerSets.add();
var layerRef = docRef.artLayers[0].duplicate();
layerRef.moveToEnd(layerSetRef);
docRef = null;
layerSetRef = null;
layerRef = null;

3.4. Rotate layer

if (app.documents.length > 0)
{
    
    if (app.activeDocument.activeLayer.isBackgroundLayer == false)
    {
    
        docRef = app.activeDocument;
        layerRef = docRef.layers[0];
        layerRef.rotate(45.0);
    }
    else
    {
    
        alert("Operation cannot be performed on background layer");
    }
}
else
{
    
    alert("You must have at least one open document to run this script!");
}

3.5. The layer type

if (!app.documents.length > 0) {
        // open new file if no document is opened.
    var strtRulerUnits = app.preferences.rulerUnits;
    app.preferences.rulerUnits = Units.PIXELS;
    var docRef = app.documents.add(320, 240, 72, null, NewDocumentMode.RGB, DocumentFill.WHITE);
    app.preferences.rulerUnits = strtRulerUnits;
}

var docRef = app.activeDocument;
var layerRef = docRef.artLayers.add();
layerRef.kind = LayerKind.TEXT;
docRef = null;
layerRef = null;

4. The author's message

   Reasonable script code can effectively improve work efficiency , Reduce repetitive labor .