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javascript - 获取选定的图层

问题描述

与这个问题不同，有没有一种方法可以返回当前选定图层的数组，而不必遍历所有图层并因此删除/重新调整该选择？

function get_selected_layers()
{
  var layers = app.activeDocument.activeLayer;
 // only works with *last* selected layer
 // not *all* selected layers
}

var thelayers = get_selected_layers;
alert(thelayers);

标签： javascriptphotoshopphotoshop-script

解决方案

有点，但不是真的。没有获取选定artLayer对象数组的本机方法。但是有一种动作管理器可以获取选定层的描述符——从描述符中你可以得到你想要的一切。这是一个返回所选层名称、索引和 ID 的数组的片段——在层描述符 ( desc) 上使用不同的 getter 可以获得其他所有内容。作为奖励artLayers，如果您想获取artLayerDOM 对象，则可以通过 ID 选择功能。是的，这适用于组和画板。

var layers = getSelectedLayersInfo();

// if we _really_ want to get artLayers we can select them one by one with IDs
for (var i = 0; i < layers.length; i++) {
  selectByID(layers[i].id);
  alert(activeDocument.activeLayer.name);
}

// and reselecting everything back
for (var i = 0; i < layers.length; i++) {
  selectByID(layers[i].id, true);
}


function getSelectedLayersInfo()
{
  var lyrs = [];
  var lyr;
  var ref = new ActionReference();
  var desc;
  var tempIndex = 0;
  var ref2;
  ref.putProperty(stringIDToTypeID("property"), stringIDToTypeID("targetLayers"));
  ref.putEnumerated(charIDToTypeID('Dcmn'), charIDToTypeID('Ordn'), charIDToTypeID('Trgt'));

  var targetLayers = executeActionGet(ref).getList(stringIDToTypeID("targetLayers"));
  for (var i = 0; i < targetLayers.count; i++)
  {
    ref2 = new ActionReference();

    // if there's a background layer in the document, AM indices start with 1, without it from 0. ¯\_(ツ)_/¯ 
    try
    {
      activeDocument.backgroundLayer;
      ref2.putIndex(charIDToTypeID('Lyr '), targetLayers.getReference(i).getIndex());
      desc = executeActionGet(ref2);
      tempIndex = desc.getInteger(stringIDToTypeID("itemIndex")) - 1;

    }
    catch (o)
    {
      ref2.putIndex(charIDToTypeID('Lyr '), targetLayers.getReference(i).getIndex() + 1);
      desc = executeActionGet(ref2);
      tempIndex = desc.getInteger(stringIDToTypeID("itemIndex"));
    }

    lyr = {};
    lyr.index = tempIndex;
    lyr.id = desc.getInteger(stringIDToTypeID("layerID"));
    lyr.name = desc.getString(charIDToTypeID("Nm  "));
    lyrs.push(lyr);
  }

  return lyrs;
}

function selectByID(id, add) {
    if (add == undefined) add = false;
    var desc1 = new ActionDescriptor();
    var ref1 = new ActionReference();
    ref1.putIdentifier(charIDToTypeID('Lyr '), id);
    desc1.putReference(charIDToTypeID('null'), ref1);
    if (add) desc1.putEnumerated(stringIDToTypeID("selectionModifier"), stringIDToTypeID("selectionModifierType"), stringIDToTypeID("addToSelection"));
    executeAction(charIDToTypeID('slct'), desc1, DialogModes.NO);
} // end of selectByID()

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