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Efl.Gfx.Vg.Value_Provider: Introduce property change feature of Efl.Ui.

Authored by jsuya on Oct 1 2019, 9:21 PM.

Description

Efl.Gfx.Vg.Value_Provider: Introduce property change feature of Efl.Ui.Animation_View

Summary:
Efl.Gfx.Vg.Value_Provider is an object for integrating and managing the properties of vector objects.
These values are dependent on the keypath.
Keypath is the target a specific content or a set of contents that will be updated.
It can include the specific name of the contents, wildcard(*) or Globstar(**).

The valueProvider is borrowed from another library that uses a vector object of type json, such as Efl.Ui.Animation_View
(https://github.com/airbnb/lottie-ios/blob/5fc0e59e0cb85d3586b1d0d1cf4a2c9669b91d15/lottie-swift/src/Public/iOS/AnimatedControl.swift#L50)

This feature should be used with some patches that apply to the vg json loader and Efl.Canvas.Vg.Object.

Test Plan: N/A

Reviewers: Hermet, kimcinoo, smohanty

Reviewed By: Hermet

Subscribers: cedric, reviewers, committers

Tags: efl

Differential Revision: https://phab.enlightenment.org/D9874