PS是一款栅格图像编辑软件，模块众多，提供了插件扩展机制，本文演示如何通过脚本实现删除所有亮度通道蒙板相关功能，展示从互联网收集而来的一个小插件，供大家学习交流，请勿用于商业用途。
1.插件界面
本文界面是一系列功能的一部分，将逐步展示，但是功能界面是共同的，如下图所示：
d20412ec35fd4e098033671909a2809c.png
2.关键代码-删除所有亮度通道蒙板
大家可通过源代码阅读，来掌握相关技巧，源代码如下：
// jamEngine.jsxinc v4.4 (minified)
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function getFromDescriptor(desc,parentContext) {if(desc) {var obj={};var keyCount;try{keyCount=desc.count;}catch(e){return null;} for(var keyIndex=0;keyIndex<keyCount;keyIndex++) {var keyID=desc.getKey(keyIndex);var keyString=getFromId(["<key>",keyID],parentContext);var keyCompact;var typeID;try{typeID=desc.getType(keyID);}catch(e){continue;} switch(typeID) {case DescValueType.BOOLEANTYPE:keyCompact=that.buildCompact("<boolean>",desc.getBoolean(keyID));break;case DescValueType.CLASSTYPE:keyCompact=that.buildCompact("<class>",getFromId(["<class>",desc.getClass(keyID)]));break;case DescValueType.DOUBLETYPE:keyCompact=that.buildCompact("<double>",desc.getDouble(keyID));break;case DescValueType.ENUMERATEDTYPE:var enumTypeContext=["<enumType>",desc.getEnumerationType(keyID)];var enumValueContext=["<enumValue>",desc.getEnumerationValue(keyID)];keyCompact=that.buildCompact("<enumerated>",that.buildCompact(getFromId(enumTypeContext),getFromId(enumValueContext,enumTypeContext)));break;case DescValueType.INTEGERTYPE:keyCompact=that.buildCompact("<integer>",desc.getInteger(keyID));break;case DescValueType.LISTTYPE:keyCompact=that.buildCompact("<list>",getFromList(desc.getList(keyID)));break;case DescValueType.OBJECTTYPE:var objectTypeContext=["<class>",desc.getObjectType(keyID)];var objectValue=desc.getObjectValue(keyID);keyCompact=that.buildCompact("<object>",that.buildCompact(getFromId(objectTypeContext),getFromDescriptor(objectValue,objectTypeContext)));break;case DescValueType.ALIASTYPE:try {var fileRef=desc.getPath(keyID);keyCompact=that.buildCompact("<path>",fileRef.fsName);} catch(e) {keyCompact=that.buildCompact("<path>",incompatiblePlatformPath);} break;case DescValueType.REFERENCETYPE:keyCompact=that.buildCompact("<reference>",getFromReference(desc.getReference(keyID)));break;case DescValueType.STRINGTYPE:keyCompact=that.buildCompact("<string>",desc.getString(keyID));break;case DescValueType.UNITDOUBLE:var unitTypeContext=["<unit>",desc.getUnitDoubleType(keyID)];var doubleValue=desc.getUnitDoubleValue(keyID);keyCompact=that.buildCompact("<unitDouble>",that.buildCompact(getFromId(unitTypeContext),doubleValue));break;default:var isRawType;var isLargeIntegerType;try{isRawType=(typeID===DescValueType.RAWTYPE);}catch(e){} try{isLargeIntegerType=(typeID===DescValueType.LARGEINTEGERTYPE);}catch(e){} if(isRawType) {keyCompact=that.buildCompact("<data>",desc.getData(keyID));} else if(isLargeIntegerType) {keyCompact=that.buildCompact("<largeInteger>",desc.getLargeInteger(keyID));} else {throw new Error("[jamEngine getFromDescriptor] Unknown descriptor value type: "+typeID);} break;} obj[keyString]=keyCompact;} return obj;} else {return null;}} jamEngine.jsonToActionDescriptor=function(descriptorObj) {that=this;var actionDescriptor;if(descriptorObj) {actionDescriptor=new ActionDescriptor();putInDescriptor(actionDescriptor,descriptorObj);} return actionDescriptor;};jamEngine.jsonToActionReference=function(referenceArr) {that=this;var actionReference;if(referenceArr) {actionReference=new ActionReference();putInReference(actionReference,referenceArr);} return actionReference;};jamEngine.eventIdAndActionDescriptorToJson=function(eventId,actionDescriptor) {that=this;var eventIdContext=["<event>",eventId];return{"<event>":getFromId(eventIdContext),"<descriptor>":getFromDescriptor(actionDescriptor,eventIdContext)};};jamEngine.classIdAndActionDescriptorToJson=function(classId,actionDescriptor) {that=this;var classIdContext=["<class>",classId];return{"<class>":getFromId(classIdContext),"<descriptor>":getFromDescriptor(actionDescriptor,classIdContext)};};jamEngine.actionReferenceToJson=function(actionReference) {that=this;return getFromReference(actionReference);};function getReferenceClassId(ref) {classId=0;do {try{var desiredClassId=ref.getDesiredClass();}catch(e){break;} if(desiredClassId!==propertyClassId) {classId=desiredClassId;break;} ref=ref.getContainer();} while(ref);return classId;} jamEngine.jsonPlay=function(eventUniIdStr,descriptorObj,displayDialogs) {var eventId=this.uniIdStrToId(eventUniIdStr);var desc=this.jsonToActionDescriptor(descriptorObj);var parentContext;if(eventId===getEventId) {var ref=desc.getReference(targetKeyId);parentContext=["<class>",getReferenceClassId(ref)];} else {parentContext=["<event>",eventId];} return getFromDescriptor(app.executeAction(eventId,desc,displayDialogs),parentContext);};jamEngine.jsonGet=function(referenceArr) {var ref=this.jsonToActionReference(referenceArr);return getFromDescriptor(app.executeActionGet(ref),["<class>",getReferenceClassId(ref)]);};jamEngine.normalizeJsonItem=function(item,options) {function normalizeItem(item) {var explicit=that.parseCompact(item);var type=explicit[0];var value=explicit[1];var normalizedValue;switch(type) {case"<boolean>":case"<data>":case"<double>":case"<identifier>":case"<index>":case"<integer>":case"<largeInteger>":case"<name>":case"<offset>":case"<path>":case"<string>":normalizedValue=value;break;case"<class>":normalizedValue=value&&getFromId(["<class>",that.uniIdStrToId(value)]);break;case"<enumerated>":var enumerated=that.parseCompact(value);var enumTypeContext=["<enumType>",that.uniIdStrToId(enumerated[0])];var enumValueContext=["<enumValue>",that.uniIdStrToId(enumerated[1])];normalizedValue=that.buildCompact(getFromId(enumTypeContext),getFromId(enumValueContext,enumTypeContext));break;case"<list>":normalizedValue=[];for(var i=0;i<value.length;i++) {normalizedValue.push(normalizeItem(value[i]));} break;case"<object>":var object=that.parseCompact(value);var objectClassContext=["<class>",that.uniIdStrToId(object[0])];var objectDescriptor=object[1];var normalizedDescriptor;if(objectDescriptor===null) {normalizedDescriptor=null;} else {normalizedDescriptor={};for(var key in objectDescriptor) {if(objectDescriptor.hasOwnProperty(key)) {var objectKeyContext=["<key>",that.uniIdStrToId(key)];normalizedDescriptor[getFromId(objectKeyContext,objectClassContext)]=normalizeItem(objectDescriptor[key]);}}} normalizedValue=that.buildCompact(getFromId(objectClassContext),normalizedDescriptor);break;case"<property>":normalizedValue=getFromId(["<key>",that.uniIdStrToId(value)]);break;case"<reference>":normalizedValue=[];for(var i=0;i<value.length;i++) {var container=that.parseCompact(value[i]);normalizedValue.push(that.buildCompact(getFromId(["<class>",that.uniIdStrToId(container[0])]),normalizeItem(container[1])));} break;case"<unitDouble>":var unitDouble=that.parseCompact(value);var unitTypeContext=["<unit>",that.uniIdStrToId(unitDouble[0])];normalizedValue=that.buildCompact(getFromId(unitTypeContext),unitDouble[1]);break;default:throw new Error("[jamEngine.normalizeJsonItem] Unknown item type: "+type);break;} return that.buildCompact(type,normalizedValue);} that=this;var saveMeaningfulIds=this.meaningfulIds;var saveParseFriendly=this.parseFriendly;if(options&&(options.constructor===Object)) {if(typeof options.meaningfulIds!=='undefined') {this.meaningfulIds=options.meaningfulIds;} if(typeof options.parseFriendly!=='undefined') {this.parseFriendly=options.parseFriendly;}} var normalizedItem=normalizeItem(item);this.meaningfulIds=saveMeaningfulIds;this.parseFriendly=saveParseFriendly;return normalizedItem;};function simplifyRef(ref) {var simplifiedRef=[];for(var i=0;i<ref.length;i++) {var element=ref[i];var simplifiedElement={};var desiredClass=element[0];var form=element[1][0];var value=element[1][1];switch(form) {case"<class>":case"<identifier>":case"<index>":case"<name>":case"<offset>":case"<property":simplifiedElement[desiredClass]=value;break;case"<enumerated>":simplifiedElement[desiredClass]=value[1];break;default:throw new Error("[jamEngine simplifyRef] Unexpected element form: "+form);break;} simplifiedRef.push(simplifiedElement);} return simplifiedRef;} function simplifyItem(item,hook) {var simplifiedItem;var type=item[0];var value=item[1];switch(type) {case"<boolean>":case"<class>":case"<data>":case"<double>":case"<integer>":case"<largeInteger>":case"<path>":case"<string>":simplifiedItem=value;break;case"<list>":simplifiedItem=simplifyList(value,hook);break;case"<enumerated>":case"<unitDouble>":simplifiedItem=value[1];break;case"<object>":simplifiedItem=simplifyDesc(value[1],hook);break;case"<reference>":simplifiedItem=simplifyRef(value);break;default:throw new Error("[jamEngine simplifyItem] Unexpected item type: "+type);break;} return simplifiedItem;} function simplifyList(list,hook) {var simplifiedList=[];for(var i=0;i<list.length;i++) {simplifiedList.push(simplifyItem(list[i],hook));} return simplifiedList;} function simplifyDesc(desc,hook) {var getDefaultValue=function(desc,key){return simplifyItem(desc[key],hook);};var simplifiedDesc={};for(var key in desc) {if(desc.hasOwnProperty(key)) {var value=undefined;if(typeof hook==='function') {value=hook(desc,key,getDefaultValue);} if(typeof value==='undefined') {value=simplifyItem(desc[key],hook);} simplifiedDesc[key]=value;}} return simplifiedDesc;} jamEngine.simplifyObject=function(object,hookFunction) {return simplifyDesc((this.normalizeJsonItem(object,{meaningfulIds:true,parseFriendly:true}))[1][1],hookFunction);};jamEngine.simplifyList=function(list,hookFunction) {return simplifyList((this.normalizeJsonItem(list,{meaningfulIds:true,parseFriendly:true}))[1],hookFunction);};jamEngine.parseCompact=function(compact) {var result=[];if(compact.constructor===Object) {var keys=[];for(var k in compact) {if(compact.hasOwnProperty(k)) {keys.push(k);}} if(keys.length===1) {result[0]=keys[0];result[1]=compact[keys[0]];} else {throw new Error("[jamEngine.parseCompact] Syntax error: "+compact.toSource());}} else if(compact.constructor===Array) {if(compact.length===2) {result[0]=compact[0];result[1]=compact[1];} else {throw new Error("[jamEngine.parseCompact] Syntax error: "+compact.toSource());}} else {throw new Error("[jamEngine.parseCompact] JavaScript object or array expected");} return result;};jamEngine.compactToExplicit=function(compact,typeKey,valueKey) {var explicit={};var typeValue=this.parseCompact(compact);explicit[typeKey||"<type>"]=typeValue[0];explicit[valueKey||"<value>"]=typeValue[1];return explicit;};jamEngine.buildCompact=function(type,value) {var compact;if(typeof type==='string') {if(this.parseFriendly) {compact=[type,value];} else {compact={};compact[type]=value;}} else {throw new Error("[jamEngine.buildCompact] String expected");} return compact;};jamEngine.explicitToCompact=function(explicit,typeKey,valueKey) {var compact;if(explicit.constructor===Object) {compact=this.buildCompact(explicit[typeKey||"<type>"],explicit[valueKey||"<value>"]);} else {throw new Error("[jamEngine.explicitToCompact] JavaScript object expected");} return compact;};for(var charIdStr in conflictingStringIdStrs) {if(conflictingStringIdStrs.hasOwnProperty(charIdStr)) {var stringIdStrs=conflictingStringIdStrs[charIdStr];for(var index=stringIdStrs.length-1;index>=0;index--) {var stringIdStr=stringIdStrs[index];if(!(app.charIDToTypeID(charIdStr.substring(1,5))===app.stringIDToTypeID(stringIdStr))) {stringIdStrs.splice(index,1);}} if(stringIdStrs.length<2) {delete conflictingStringIdStrs[charIdStr];}}} for(var charIdStr in contextRules) {if(contextRules.hasOwnProperty(charIdStr)) {if(charIdStr in conflictingStringIdStrs) {var rule=contextRules[charIdStr];for(var kind in rule) {if(rule.hasOwnProperty(kind)) {switch(kind) {case"<class>":case"<event>":case"<enumType>":case"<enumValue>":case"<key>":case"<unknown>":if(app.charIDToTypeID(charIdStr.substring(1,5))!=app.stringIDToTypeID(rule[kind])) {throw new Error("[jamEngine] "+"\""+charIdStr+"\" and \""+rule[kind]+"\" are not equivalent ID strings");} break;case"<classKey>":case"<eventKey>":case"<typeValue>":for(var parent in rule[kind]) {if(rule[kind].hasOwnProperty(parent)) {if(app.charIDToTypeID(charIdStr.substring(1,5))!=app.stringIDToTypeID(rule[kind][parent])) {throw new Error("[jamEngine] "+"\""+charIdStr+"\" and \""+rule[kind][parent]+"\" are not equivalent ID strings");}}} break;}}}} else {delete contextRules[charIdStr];}}}}());}
jamEngine.meaningfulIds = true;
jamEngine.parseFriendly = true;
// Action “Start Deleting”
try
{
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 1"
]
]
]
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 2"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 3"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 4"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 5"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 6"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 1"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 2"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 3"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 4"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 5"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 6"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 1"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 2"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 3"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 4"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 5"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Select
if (true)
{
jamEngine.jsonPlay
(
"select",
{
"target":
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 6"
]
]
]
],
"extend":
[
"<boolean>",
true
]
},
DialogModes.NO
);
}
// Delete
if (true)
{
jamEngine.jsonPlay
(
"delete",
{
"target":
[
"<list>",
[
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 6"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 5"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 4"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 3"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 2"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Midtones 1"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 6"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 5"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 4"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 3"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 2"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Darks 1"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 6"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 5"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 4"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 3"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 2"
]
]
]
],
[
"<reference>",
[
[
"channel",
[
"<name>",
"Brights 1"
]
]
]
]
]
]
},
DialogModes.NO
);
}
}
catch (e)
{
if (e.number !== 8007) // Not a user cancel error
{
try
{
jamEngine.jsonPlay
(
"stop",
{
"message":
[
"<string>",
e.message.replace (/^.*\n- /, "")
]
},
DialogModes.ALL
);
}
catch (e)
{
}
}
}
3.作者答疑
代码长度过长，如需全部项目或有疑问，请留言。
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