Custom gestures

1. A method comprising:

determining, by a computing device associated with a user of a social-networking system, that a custom-touch-gesture feature should be turned on and enabling the custom-touch-gesture feature for the computing device, wherein the determining is based on usage of the custom-touch-gesture feature by at least a threshold number of the user's social contacts within a specified social degree of separation in the social-networking system;

identifying, by the computing device, a touch gesture on a touch screen of the computing device as a particular one of a plurality of custom touch gestures of the user stored on the computing device, each of the custom touch gestures having been recorded and assigned to a particular one of a plurality of user inputs by the computing device in response to an instruction from the user;

determining, by the computing device, the particular one of the user inputs corresponding to the particular one of the custom touch gestures identified as the touch gesture made by the user; and

executing, by the computing device, one or more actions based on the particular one of the user inputs.

2. The method of claim 1 , wherein one or more of the custom touch gestures comprise a touch trajectory determined based at least in part on a machine-learning algorithm.

3. The method of claim 1 , wherein the actions comprise navigating from a user interface (UI) of a home or locked screen of the computing device to a UI of a particular application on the computing device.

4. The method of claim 1 , wherein the actions comprise launching an application on the computing device from a shell of an operating system (OS) running on the computing device.

5. The method of claim 1 , wherein the actions comprise adjusting a controllable parameter of an application on the computing device.

6. The method of claim 1 , wherein the computing device is a smartphone.

7. The method of claim 1 , wherein the plurality of custom touch gestures of the user are stored in a user preference file on a remote server.

8. The method of claim 1 , wherein assigning a custom touch gesture comprises:

accessing a recording user interface of a recording application;

receiving one or more training inputs from the user within the recording user interface, the one or more training inputs comprising one or more touch trajectories;

determining a custom touch gesture based on the one or more training inputs;

presenting to the user one or more user inputs from the plurality of user inputs;

receiving an instruction from the user selecting a particular user input; and

assigning the determined custom touch gesture to the particular user input.

9. One or more computer-readable non-transitory storage media embodying software that is operable when executed to:

determine that a custom-touch-gesture feature should be turned on and enabling the custom-touch-gesture feature for a computing device, wherein the determining is based on usage of the custom-touch-gesture feature by at least a threshold number of the user's social contacts within a specified social degree of separation in a social-networking system;

identify a touch gesture on a touch screen of the computing device as a particular one of a plurality of custom touch gestures of the user stored on the computing device, each of the custom touch gestures having been recorded and assigned to a particular one of a plurality of user inputs by the computing device in response to an instruction from the user;

determine the particular one of the user inputs corresponding to the particular one of the custom touch gestures identified as the touch gesture made by the user; and

execute one or more actions based on the particular one of the user inputs.

10. The media of claim 9 , wherein one or more of the custom touch gestures comprise a touch trajectory determined based at least in part on a machine-learning algorithm.

11. The media of claim 9 , wherein the actions comprise navigating from a user interface (UI) of a home or locked screen of the computing device to a UI of a particular application on the computing device.

12. The media of claim 9 , wherein the actions comprise launching an application on the computing device from a shell of an operating system (OS) running on the computing device.

13. The media of claim 9 , wherein the actions comprise adjusting a controllable parameter of an application on the computing device.

14. The media of claim 9 , wherein the computing device is a smartphone.

15. A device comprising:

one or more processors; and

one or more computer-readable non-transitory storage media coupled to the processors and embodying software that is operable when executed by the processors to:

determine that a custom-touch-gesture feature should be turned on and enabling the custom-touch-gesture feature for a computing device, wherein the determining is based on usage of the custom-touch-gesture feature by at least a threshold number of the user's social contacts within a specified social degree of separation in a social-networking system, that the custom-touch-gesture feature should be turned on and enabling the custom-touch-gesture feature for the device;

identify a touch gesture on a touch screen of the device as a particular one of a plurality of custom touch gestures of the user stored on the device, each of the custom touch gestures having been recorded and assigned to a particular one of a plurality of user inputs by the device in response to an instruction from the user;

determine the particular one of the user inputs corresponding to the particular one of the custom touch gestures identified as the touch gesture made by the user; and

execute one or more actions based on the particular one of the user inputs.

16. The device of claim 15 , wherein one or more of the custom touch gestures comprise a touch trajectory determined based at least in part on a machine-learning algorithm.

17. The device of claim 15 , wherein the actions comprise navigating from a user interface (UI) of a home or locked screen of the computing device to a UI of a particular application on the computing device.

18. The device of claim 15 , wherein the actions comprise launching an application on the computing device from a shell of an operating system (OS) running on the computing device.

19. The device of claim 15 , wherein the actions comprise adjusting a controllable parameter of an application on the computing device.