Oren's Folder: Auto Links Rename [InDesign JavaScript]

Wednesday, September 16, 2009

Auto Links Rename [InDesign JavaScript]

Here's my recipe for links renaming in Adobe InDesign.
The following script will rename all linked images in the defined page-sequence, with a padded page number and the user entered prefix. For pages featuring more than one image a letter counter is added, seperated by an underscore.

Page numbers are padded according to the total number of pages in the document. The prefix is checked not to contain any digits or space characters. If the letter counter passes the letter 'z' it resolves to continue with numbers.

The script was written for version CS4, but I assume it should also work on CS3.

// Auto Links Rename
// (c) by Oren Hadar, 2009

var docPages = app.activeDocument.pages;

myDisplayDialog()

function myDisplayDialog(){
 var myDialog = app.dialogs.add({name:"Auto Links Rename"}); 
  with(myDialog.dialogColumns.add()){
   with(dialogRows.add()){ 
    staticTexts.add({staticLabel:"Prefix:"}); 
    var linkPrefixField = textEditboxes.add({editContents:"", minWidth:96}); 
   }
   with(dialogRows.add()){ 
    staticTexts.add({staticLabel:"Pages"}); 
   }
   with(borderPanels.add()){
    with(dialogColumns.add()){
     with(dialogRows.add()){ 
      staticTexts.add({staticLabel:"From:", minWidth:32}); 
      var fromPageField = integerEditboxes.add({editValue:1, minWidth:64}); 
     }
     with(dialogColumns.add()){
      with(dialogRows.add()){ 
       staticTexts.add({staticLabel:"To:", minWidth:32}); 
       var toPageField = integerEditboxes.add({editValue:docPages.length, minWidth:64}); 
      } 
     }
    }
   }
  }
 var myResult = myDialog.show(); 
 if(myResult == true){
 var linkPrefix = linkPrefixField.editContents; 
 var fromPage = --fromPageField.editValue;
 var toPage = --toPageField.editValue;
  try{
   if((fromPage > docPages.length) || (toPage > docPages.length)){
    throw "Err1";
   }
   else if(fromPage > toPage){
    throw "Err2";
   }
   else if((linkPrefix. search(/\s/)!= -1) || (linkPrefix.search(/\d/) != -1) || (linkPrefix == "")){
    throw "Err3";
   }
  }
  catch(er){
   if(er=="Err1"){
    myDialog.destroy();
    alert("Error!\n\nThe entered page numbers must not exceed the number of pages in the document.");
   }
   if(er=="Err2"){
    myDialog.destroy();
    alert("Error!\n\nThe 'From' page number exceeds the 'To' page number.");
   }
   if(er=="Err3"){
    myDialog.destroy();
    alert("Error!\n\nThe entered prefix contains digits or space characters, or no prefix was entered.");
   }
  }
  finally{
   myDialog.destroy();
   AutoLinksRename(linkPrefix, fromPage, toPage);
   alert("Done!");
  }
 }
 else{
  myDialog.destroy(); 
  alert("Cancelled.");
 }
}

function AutoLinksRename(linkPrefix, fromPage, toPage){
 for (var p = fromPage; p <= toPage; p++){
  var pageImages = docPages[p].allGraphics;
  var imageCounter = 0;
  var letterCounter = 0;
  for (var i = pageImages.length-1 ; i >= 0 ; i--){
   imageCounter++;
   letterCounter++;
   var myLink = pageImages[i].itemLink;
   var myLinkExtension = myLink.name.substr(myLink.name.lastIndexOf( "." ));
   var myFile = new File(myLink.filePath);
   if (pageImages.length == 1){
    var myNewLinkName = linkPrefix + PadPage(docPages[p].name) + myLinkExtension;
   }
   else{
    var myNewLinkName = linkPrefix + PadPage(docPages[p].name) + "_" + GetLetter(letterCounter) + myLinkExtension;
   }
   if (myNewLinkName !=  myLink.name){
    if (myFile.exists){
     myFile.rename(myNewLinkName);
     myLink.relink(myFile);
     myLink.update();
    }
   }
  }
 }
}

function PadPage(myPage){
 var toPad = String(docPages.length).length - String(myPage).length;
 var paddedPage = String(myPage);
 for(var i = 0; i < toPad ; i++){
  paddedPage = "0" + paddedPage;
 }
 return paddedPage;
}

function GetLetter(myNumber){
 if (myNumber <= 26){
  return String.fromCharCode(96 + myNumber);
 }
 else{
  return myNumber;
 }
}

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