Accessing the DOM from UPX plugins

Photoshop UXP Plugin API
1

I am trying to convert some CEP functions into the UXP environment but I’m having trouble accessing the DOM. For instance this code worked with CEP:

var orig_ruler_units = app.preferences.rulerUnits;
var orig_type_units = app.preferences.typeUnits;
app.preferences.rulerUnits = Units.PIXELS; 
app.preferences.typeUnits = TypeUnits.POINTS;

But these same lines of code error out in the plugin because the attributes don’t exist. Is there any documentation on what is accessible via the UPX environment? I know how I can find these for use via batchplay but if I can go through the DOM I would prefer that approach.

2

Hi, you might want to look into using this fantastic Photoshop plugin for UXP “Alchemist” by @Jarda :+1:
You can grab the developper version for free here GitHub - jardicc/alchemist
Highly recommended :wink:

Inside Alchemist, you can shoose to get Application rulerUnits Content:

Screenshot 2021-05-13 at 14.56.55
Screenshot 2021-05-13 at 14.56.551266×940 98.8 KB

Here’s the code you can use

const batchPlay = require("photoshop").action.batchPlay;
let getRulerUnits = await batchPlay(
        [{
          "_obj": "get",
          "_target": [{
              "_property": "rulerUnits"
            },
            {
              "_ref": "application",
              "_enum": "ordinal",
              "_value": "targetEnum"
            }
          ],
          "_options": {}
        }], {
          "synchronousExecution": true
        })[0].rulerUnits._value;
        
      console.log(`Ruler Units: ${getRulerUnits}`)

Is that what you 're after ?

3

Thanks, but I was looking to see if I could do this without batchplay. I already have similar code in my script but it seems like every interaction with photoshop is now requiring a batchplay command. I was looking to see if anyone knew if UXP would have access to any of the photoshop objects like Extendscript had.

4

The rulerunit property is not yet available via DOM. The API will grow over time, but right now this is all that’s accessible on the app object.

5

Thanks, that is what I thought.