How do I script Illustrator to get a PANTONE swatch from a swatch library

Question

I've been searching high and low, but cannot find the answer to this question.  Quite simply, I need a script to convert all PANTONE spot colors in an Illustrator file into their CMYK equivalents fromthe PANTONE BRIDGE book.
In order to accomplish this, however, it would seem necessary for the script to search through the various PANTONE swatch library color books to find the one I'm looking for.  I have a String of the one I need, but I don't see how ExtendScript can search within the various swatch libraries (or even just the one library—"PANTONE+ Color Bridge (Un)Coated".  I can only seem to look at swatches that are in the main "Swatches" palette using Document.swatches.  Any ideas?

Answer 1

I'm afraid that code gives me an 'MRAP' error in the ESTK.  But, I have actually found a way around the problem by utilizing your original suggestion of having a separate file with all of the Pantone swatches added to it so the script can grab that swatch, grab its getInternalColor, turn it into a CMYKColor, then assign the values retrieved from getInternalColor to the new swatch's four Color properties.
Yes, it's a bit of a roundabout method and takes a lot of code, but it gets the job done quickly, and that's what I need.  Here's the code I have (The "workDoc" has already been assigned to the currently open document.):
// To finish up, we delete the other two layers beyond the first and then save the file for use as digital printing file.
// First, delete the two layers.
workDoc.layers[2].locked = false;
workDoc.layers[2].remove();
workDoc.layers[1].locked = true;
//          workDoc.layers[1].remove();
// Before grouping and mirroring all of the artwork, it's time to convert all spot colors to process
// using the PANTONE Bridge book as a reference.
// First, let's open up the reference document that has all of the PANTONE Bridge book colors as swatches.
var bridgeDoc = app.open(File("~/Documents/PantoneBridge.ai"));
// Since attempting to colorize textFrame objects seems to crash Illustrator, we're best off just converting them all to paths anyway.
var texts = workDoc.textFrames;
for (var t = 0; t < texts.length; t++)
          texts[t].createOutline();
var items = workDoc.pathItems;
for (var i = 0; i < items.length; i++)
          var myPath = items[i];
          if (myPath.fillColor .typename == "SpotColor")
                    try {var procSwatch = workDoc.swatches.getByName(myPath.fillColor.spot.name + "P");}
                              catch (e) {var procSwatch = addProcSwatch(myPath.fillColor.spot.name + "P", bridgeDoc.swatches);}
                    changePaths(myPath.fillColor.spot.name, procSwatch.color);
          if (myPath.fillColor.typename == "GradientColor")
                    for (var g = 0; g < myPath.fillColor.gradient.gradientStops.length; g++)
                              var gStop = myPath.fillColor.gradient.gradientStops[g].color;
                              if (gStop.typename == "SpotColor")
                                        try {var procSwatch = workDoc.swatches.getByName(gStop.spot.name + "P");}
                                                  catch (e) {var procSwatch = addProcSwatch(gStop.spot.name + "P", bridgeDoc.swatches);}
                                        changePaths(gStop.spot.name, procSwatch.color);
          if (myPath.strokeColor .typename == "SpotColor")
                    try {var procSwatch = workDoc.swatches.getByName(myPath.strokeColor.spot.name + "P");}
                              catch (e) {var procSwatch = addProcSwatch(myPath.strokeColor.spot.name + "P", bridgeDoc.swatches);}
                    changePaths(myPath.strokeColor.spot.name, procSwatch.color);
          if (myPath.strokeColor.typename == "GradientColor")
                    for (var g = 0; g < myPath.strokeColor.gradient.gradientStops.length; g++)
                              var gStop = myPath.strokeColor.gradient.gradientStops[g].color;
                              if (gStop.typename == "SpotColor")
                                        try {var procSwatch = workDoc.swatches.getByName(gStop.spot.name + "P");}
                                                  catch (e) {var procSwatch = addProcSwatch(gStop.spot.name + "P", bridgeDoc.swatches);}
                                        changePaths(gStop.spot.name, procSwatch.color);
var rasters = workDoc.rasterItems;
var bitmapFound = false;
var checkForTint = false;
for (var i = 0; i < rasters.length; i++)
          var myRaster = rasters[i];
          if (myRaster.channels == 1 && myRaster.colorizedGrayscale) {if (myRaster.colorizedGrayscale) {bitmapFound = true;}}
          else if (myRaster.channels < 4 && myRaster.colorizedGrayscale)
                    if (/^PANTONE/.test(myRaster.colorants[0]))
                              try {var rastSwatch = workDoc.swatches.getByName(myRaster.colorants[0] + "P");}
                                        catch (e) {var rastSwatch = addProcSwatch(myRaster.colorants[0] + "P", bridgeDoc.swatches);}
                              changeRasters(myRaster.colorants[0], rastSwatch.color);
if (bitmapFound) {alert("Found at least one colorized raster image in the Digital file.  Please manually change their colorants to CMYK.\nPlease see Chris McGee for more information.");}
if (checkForTint) {alert("At least one raster image in the art has been converted to CMYK.  However, if its former spot color was tinted less than 100%, then you will need to manually change the colorant in the Digital file to match.\nPlease see Chris McGee for more information.");}
// We should be done now with the PANTONE Bridge reference document, so close that.
bridgeDoc.close(SaveOptions.DONOTSAVECHANGES);
app.redraw();
function addProcSwatch(swatchToGet, docSwatches)
          var bridgeSwatch = docSwatches.getByName(swatchToGet);
          var newSwatch = workDoc.swatches.add();
          var spotName = bridgeSwatch.color.spot.name;
          var spotValue = bridgeSwatch.color.spot.getInternalColor();
          newSwatch.color = CMYKColor;
          newSwatch.name = spotName;
          newSwatch.color.cyan = spotValue[0];
          newSwatch.color.magenta = spotValue[1];
          newSwatch.color.yellow = spotValue[2];
          newSwatch.color.black = spotValue[3];
          return newSwatch;
function changePaths (colorName, newColor)
          var allItems = workDoc.pathItems;
          for (var j = 0; j < allItems.length; j++)
                    var thisPath = allItems[j];
                    if (thisPath.fillColor.typename == "SpotColor" && thisPath.fillColor.spot.name == colorName)
                              var thisTint = thisPath.fillColor.tint / 100;
                              thisPath.fillColor = newColor;
                              thisPath.fillColor.cyan *= thisTint;
                              thisPath.fillColor.magenta *= thisTint;
                              thisPath.fillColor.yellow *= thisTint;
                              thisPath.fillColor.black *= thisTint;
                    if (thisPath.fillColor.typename == "GradientColor")
                              for (var g = 0; g < thisPath.fillColor.gradient.gradientStops.length; g++)
                                        var gStop = thisPath.fillColor.gradient.gradientStops[g];
                                        if (gStop.color.typename == "SpotColor" && gStop.color.spot.name == colorName)
                                                  var thisTint = gStop.color.tint / 100;
                                                  gStop.color = newColor;
                                                  gStop.color.cyan *= thisTint;
                                                  gStop.color.magenta *= thisTint;
                                                  gStop.color.yellow *= thisTint;
                                                  gStop.color.black *= thisTint;
                    if (thisPath.strokeColor.typename == "SpotColor" && thisPath.strokeColor.spot.name == colorName)
                              var thisTint = thisPath.strokeColor.tint / 100;
                              thisPath.strokeColor = newColor;
                              thisPath.strokeColor.cyan *= thisTint;
                              thisPath.strokeColor.magenta *= thisTint;
                              thisPath.strokeColor.yellow *= thisTint;
                              thisPath.strokeColor.black *= thisTint;
                    if (thisPath.strokeColor.typename == "GradientColor")
                              for (var g = 0; g < thisPath.strokeColor.gradient.gradientStops.length; g++)
                                        var gStop = thisPath.strokeColor.gradient.gradientStops[g];
                                        if (gStop.color.typename == "SpotColor" && gStop.color.spot.name == colorName)
                                                  var thisTint = gStop.color.tint / 100;
                                                  gStop.color = newColor;
                                                  gStop.color.cyan *= thisTint;
                                                  gStop.color.magenta *= thisTint;
                                                  gStop.color.yellow *= thisTint;
                                                  gStop.color.black *= thisTint;
function changeRasters (colorName, newColor)
          var allRasters = workDoc.rasterItems;
          for (var j = 0; j < allRasters.length; j++)
                    var thisRaster = allRasters[j];
                    if (thisRaster.channels > 1 && thisRaster.channels < 4 && thisRaster.colorizedGrayscale)
                              if (/^PANTONE/.test(thisRaster.colorants[0]) && thisRaster.colorants[0] == colorName)
                                        thisRaster.colorize(newColor);
                                        checkForTint = true;
// That concludes all of the color-changing steps.
I hope this helps anyone else who is running into this (admittedly unusual) situation.