add message interface

[tsl0922]

Replaces #30.

example usage:

test.lua:

local utils = require('mp.utils')
local msg = require('mp.msg')

mp.register_script_message('menu-get-reply', function(data)
	msg.info('reply: ' .. data)
end)

local menu = {
	title='recent',
	type='submenu',
	submenu={
		{title='foo', cmd='show-text foo'},
		{title='bar', cmd='show-text bar'},
	},
}

mp.register_script_message('menu-ready', function()
	mp.commandv('script-message-to', 'dyn_menu', 'get', 'audio-devices', mp.get_script_name())
	mp.commandv('script-message-to', 'dyn_menu', 'update', 'recent', utils.format_json(menu))
	mp.commandv('script-message-to', 'dyn_menu', 'update', 'chapters', utils.format_json(menu))
end)

input.conf:

_           ignore                            #menu: Audio Devices #@audio-devices
_           script-binding recentmenu/open    #menu: Recent #@recent
_           ignore                            #menu: Chapters #@chapters

[dyphire]

This is much better than my implementation.

[dyphire]

There is another issue here, you render the titles passed by other scripts as titles in the menu, but this will cause the specified titles in the input.conf file to be overwritten.

For example, input.conf:

_           ignore    #menu: 最近播放 #@recent

This behavior is not what I want. Adding additional detection that only force overwrite when the corresponding title in the input.conf file is empty.

[tsl0922]

As a convenience, if you don't want to override menu title and type, omit the corresponding field in json.

[dyphire]

As a convenience, if you don't want to override menu title and type, omit the corresponding field in json.

This is just what I wanted.

[dyphire]

The last commit disrupted the JSON work of other scripts.

[tsl0922]

Pushed a fix for it.

I'm new to lua 🤣 .

[dyphire]

Pushed a fix for it.

I'm new to lua 🤣 .

Not a completely correct fix, there is a syntax issue with determining that the table in the script is empty.

[tsl0922]

Well, I just removed the check for empty table, after I realized that I have to iterate it to check if it is empty.

In fact ,there maybe other cornercases here, I'm not going to validate all of them, because the C plugin will ignore them.

[dyphire]

Well, I just removed the check for empty table, after I realized that I have to iterate it to check if it is empty.

In fact ,there maybe other cornercases here, I'm not going to validate all of them, because the C plugin will ignore them.

#32