get-doc-info.js

      private function getDocumentInfo():Object {
        var originalUnits:Units = photoshop.preferences.rulerUnits;
        
        photoshop.preferences.rulerUnits = Units.PIXELS
        
        var info:Object = {
          hasOpenDocuments: photoshop.documents.length > 0,
          ruler: friendlyUnits(originalUnits)
        }
        if(info.hasOpenDocuments) {
          var doc:Document = photoshop.activeDocument
          var ref:ActionReference = new ActionReference()
          ref.putEnumerated(photoshop.charIDToTypeID("Dcmn"), photoshop.charIDToTypeID("Ordn"), photoshop.charIDToTypeID("Trgt"))
            
          var desc:ActionDescriptor = photoshop.executeActionGet(ref)
          var xOffset:Number = (desc.getInteger(photoshop.stringIDToTypeID("rulerOriginH"))/65536)*-1
          var yOffset:Number = (desc.getInteger(photoshop.stringIDToTypeID("rulerOriginV"))/65536)*-1
          info.resolution     = doc.resolution
          info.isSelection    = doc.selection.bounds != null
          info.existingGuides = getExistingGuides(xOffset, yOffset)
          if(info.isSelection){
            info.offsetX = parseInt(doc.selection.bounds[0]) + xOffset
            info.offsetY = parseInt(doc.selection.bounds[1]) + yOffset
            info.width  = parseFloat(doc.selection.bounds[2]) - parseFloat(doc.selection.bounds[0])
            info.height = parseFloat(doc.selection.bounds[3]) - parseFloat(doc.selection.bounds[1])
          } else {
            info.offsetX      = xOffset+0
            info.offsetY      = yOffset+0
            info.width  = parseInt(doc.width.toString())
            info.height = parseInt(doc.height.toString())
          }
        }
          
        photoshop.preferences.rulerUnits = originalUnits
        return info
      }