prefs

Provides access to application preferences, typically stored via NSUserDefaults or CFProperties. To access the preferences, simply pass in the Bundle ID (eg. "com.apple.Preview") and it will return a table whose keys can be accessed or updated, or iterated via ipairs.
For example:
local previewPrefs = require("cp.app.prefs").new("com.apple.Preview")
previewPrefs.MyCustomPreference = "Hello world"
print(previewPrefs.MyCustomPreference) --> "Hello world"
​
for k,v in pairs(previewPrefs) do
    print(k .. " = " .. tostring(v))
end
API Overview
Functions - API calls offered directly by the extension
​bundleID​
​get​
​is​
​prop​
​set​
​watch​
Constructors - API calls which return an object, typically one that offers API methods
​new​
API Documentation
Functions
​bundleID​
Signature
cp.app.prefs.bundleID(prefs) -> string
Type
Function
Description
Retrieves the bundleID associated with the cp.app.prefs instance.
Parameters
prefs - the prefs object to query
Returns
The Bundle ID string, or nil if it's not a cp.app.prefs.
​get​
Signature
cp.app.prefs.get(prefs, key[, defaultValue]) -> value
Type
Function
Description
Retrieves the specifed key from the provided prefs.
Parameters
prefs - The prefs instance. * key - The key to retrieve. * defaultValue - The value to return if none is currently set.
Returns
The current value, or defaultValue if not set.
​is​
Signature
cp.app.prefs.is(thing) -> boolean
Type
Function
Description
Checks if the thing is a cp.app.prefs instance.
Parameters
thing - The value to check
Returns
true if if's a prefs, otherwise false.
​prop​
Signature
cp.app.prefs.prop(prefs, key[, defaultValue]) -> cp.prop
Type
Function
Description
Retrieves the cp.prop for the specified key. It can be watched for changes.
Parameters
prefs - The prefs instance. * key - The key to get/set. * defaultValue - The value if no default values is currently set.
Returns
The cp.prop for the key.
​set​
Signature
cp.app.prefs.set(prefs, key, value) -> none
Type
Function
Description
Sets the key/value for the specified prefs instance.
Parameters
prefs - The prefs instance. * key - The key to set. * value - the new value.
Returns
Nothing.
​watch​
Signature
cp.app.prefs.watch(prefs, watchFn) -> nil
Type
Function
Description
Adds a watch function which will be notified when the preferences change.
Parameters
prefs - The prefs instance to watch. * watchFn - The function that will get called.
Returns
Nothing
Constructors
​new​
Signature
cp.app.prefs.new(bundleID) -> cp.app.prefs
Type
Constructor
Description
Creates a new cp.app.prefs instance, pointing at the specified bundleID.
Parameters
bundleID The Bundle ID to access preferences for.
Returns
A new cp.app.prefs with read/write access to the application's preferences.

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Signature	`cp.app.prefs.bundleID(prefs) -> string`
Type	Function
Description	Retrieves the `bundleID` associated with the `cp.app.prefs` instance.
Parameters	prefs - the `prefs` object to query
Returns	The Bundle ID string, or `nil` if it's not a `cp.app.prefs`.

Signature	`cp.app.prefs.get(prefs, key[, defaultValue]) -> value`
Type	Function
Description	Retrieves the specifed `key` from the provided `prefs`.
Parameters	prefs - The `prefs` instance. * key - The key to retrieve. * defaultValue - The value to return if none is currently set.
Returns	The current value, or `defaultValue` if not set.

Signature	`cp.app.prefs.is(thing) -> boolean`
Type	Function
Description	Checks if the `thing` is a `cp.app.prefs` instance.
Parameters	thing - The value to check
Returns	`true` if if's a `prefs`, otherwise `false`.

Signature	`cp.app.prefs.prop(prefs, key[, defaultValue]) -> cp.prop`
Type	Function
Description	Retrieves the `cp.prop` for the specified key. It can be `watched` for changes.
Parameters	prefs - The `prefs` instance. * key - The key to get/set. * defaultValue - The value if no default values is currently set.
Returns	The `cp.prop` for the key.

Signature	`cp.app.prefs.set(prefs, key, value) -> none`
Type	Function
Description	Sets the key/value for the specified `prefs` instance.
Parameters	prefs - The `prefs` instance. * key - The key to set. * value - the new value.
Returns	Nothing.

Signature	`cp.app.prefs.watch(prefs, watchFn) -> nil`
Type	Function
Description	Adds a watch function which will be notified when the preferences change.
Parameters	prefs - The `prefs` instance to watch. * watchFn - The function that will get called.
Returns	Nothing

Signature	`cp.app.prefs.new(bundleID) -> cp.app.prefs`
Type	Constructor
Description	Creates a new `cp.app.prefs` instance, pointing at the specified `bundleID`.
Parameters	bundleID The Bundle ID to access preferences for.
Returns	A new `cp.app.prefs` with read/write access to the application's preferences.

prefs

API Overview

API Documentation

Functions

​bundleID​

​get​

​is​

​prop​

​set​

​watch​

Constructors

​new​

bundleID

get

is

prop

set

watch

new