oxy_urlChooser Form Control Does Not Show the Browse Button

Problem

The oxy_urlChooser form control in Oxygen XML Web Author does not show the browse button near the text field. Other actions such as inserting an image or a link to another file may not work or may show a text field instead of a file browser.

Cause

The oxy_urlChooser form control uses the UrlChooser (sync.api.UrlChooser) installed from a JavaScript plugin. If no such UrlChooser is installed, the browse button does not appear in the UI.

Solution

You can install an UrlChooser that allows for choosing a resource in your CMS. The following code snippet implements a dummy UrlChooser that shows a prompt to the user that asks for the URL:

var DummyUrlChooser = function() {
  sync.api.UrlChooser.call(this);
};
DummyUrlChooser.prototype = Object.create(sync.api.UrlChooser.prototype);
DummyUrlChooser.prototype.constructor = DummyUrlChooser;

// Only support image choosing
DummyUrlChooser.prototype.supports = function(type) {
    return type == sync.api.UrlChooser.Type.IMAGE;
};
// 
DummyUrlChooser.prototype.chooseUrl = function(context, chosen) {
  if (context.getType() == sync.api.UrlChooser.Type.IMAGE) {
    var result = prompt();
    chosen(result);
  }
  return null;
};

Then, you can register it using the following API call:

workspace.setUrlChooser(new DummyUrlChooser());