Most URLs are allowed in HTML content, subject to a few restrictions.
The scheme "file://" is restricted to the docs directory on your device.
The scheme "browser://" passes the URL-decoded text after the "//" to the iOS browser, switching from this app. For example:
opens Safari with the support site for this app.
The "gardenutils://" scheme contains a command line, with ";" separated commands, described below.
URLs starting with "gardenutils://" are processed by the app as commands. Each such URL can contain any number of commands, each separated by ";" characters. Whitespace is trimmed around the commands.
The commands that have access to the pasteboard (pastetovar and varappendpaste) will use blank for the current pasteboard if the contents of the pasteboard were not set in this app since it last returned to the screen.
The commands are:
loaddecimal value - makes value (expressed in decimal) the current number on the Numbers screen
loadhex hexvalue - make value (expressed in hex) the current number
screen name - switches to screen "name" - currently may only be "numbers"
log a b c ... - concatentates args with " " and adds to logfile
lognl a b c ... - concatenates args with " " and adds to logfile followed by newline
editlogfile - switches to logfile for editing
debug on/off - controls logging of commands executed to logfile