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rhysd ffdab65515 describe how to write up "accounts" section (#4 )

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Web-based Desktop Client for Mastodon

Mstdn is a desktop application based on mobile version Mastodon page and Electron framework. It basically uses Mastodon's mobile page and provides various desktop application features (such as desktop notification, keybinds, multi-account support).

Features:

Small window on your menubar (or isolated normal window)
Desktop notification
Customizable (and pluggable) shortcut keybinds
Multi-account (switching among accounts)
User CSS
Plugin architecture based on Node.js and Electron APIs

Mastodon is an open source project. So if you want to make a new UI, you can just fork the project, implement your favorite UI and host it on your place. Then you can participate Mastodon networks from it.

However, Mastodon is a web application. So we can't go out from a browser. So this small tool provides a way to do it.

Installation

Via npm

$ npm install -g mstdn

As an isolated app

Download a package archive from Release page, put unarchived app to proper place, and open it.

Usage

If you installed this app via npm, below command is available to start app.

$ open-mstdn-app

At first, a dialog which recommends to write up config is shown and JSON config file will be open in your editor. You need to fill up "name" and "host" keys in first element of "accounts". Please see below accounts section to know how to configure the option.

Then please try to start app again. Usage is the same as web client on mobile devices. Some shortcuts are available by default (please see below 'Customization' section).

Supported platforms are macOS (confirmed with 10.12), Linux (hopefully) and Windows (confirmed with Windows 8.1).

Customization

Mstdn can be customized with JSON config file at {app dir}/config.json

The {app dir} is:

~/Library/Application\ Support/Mstdn for macOS
~/.config/Mstdn for Linux
%APPDATA%\Mstdn for Windows.

The JSON file can contain below key-values:

`hot_key`

hot_key is a key sequence to toggle application window. The shortcut key is defined globally. The format is a Electron's accelerator. Please see the document to know how to configure this value. Default value is "CmdOrCtrl+Shift+S". If you want to disable, please set empty string or null.

`icon_color`

Color of icon in menubar. "black" or "white" can be specified.

`always_on_top`

When this value is set to true, the window won't be hidden if it loses a focus. Default value is false.

`normal_window`

When this value is set to true, application will be launched as a normal window application. If menu bar behavior does not work for you, please use set this value to true to avoid it. Default value is false on macOS or Linux, true on Windows because window position is broken in some version of Windows.

`hide_menu`

When this value is set to true, the application will be launched with the menubar hidden, assuming normal_window is also true. When set to false, the menubar will be visible on launch. Default value is false.

On Windows, typing Alt key shows the hidden menubar.

`zoom_factor`

Font zoom factor in application. It should be positive number. For example, 0.7 means 70% font zooming. Default font size is a bit bigger because the UI is originally for mobile devices. So default value is 0.9.

`accounts`

Array of your accounts. An element should has "name", "host" and "default_page" keys.

"name" represents your screen name. If your name is @foo then please specify "foo" for it.

"host" represents a host part of URL of your mastodon instance. If you belong to https://mastodon.social, please specify mastodon.social. https:// is not necessary.

"default_page" is a path of page firstly shown. If /web/notifications is specified, https://{your host}/web/notifications will be open on app starting.

You need to write up this config at first.

`chromium_sandbox`

If true is specified, Chromium's native sandbox is enabled (and default value is true). Sandbox provides some OS level security protection such as resource access control like tabs in Chromium. However, sandbox also blocks preload scripts for Electron application.

If false is specified, you can use some advanced features (user CSS and key shortcut plugin). Before setting false to this value, please read and understand sandbox documentation in Electron repo to know what you're doing.

`keymaps`

Object whose key is a key sequence and whose value is an action name.

Action Name	Description	Default Key
`scroll-down`	Scroll down window	`j`
`scroll-up`	Scroll up window	`k`
`scroll-top`	Scroll up to top of window	`i`
`scroll-bottom`	Scroll down to bottom of window	`m`
`next-account`	Switch to next account	N/A
`prev-account`	Switch to previous account	N/A
`open-in-browser`	Open current page in browser	N/A

If an action name starts with /, it will navigate to the path. For example, if you set "/web/timelines/home" to some key shortcut and you input the key, browser will navigate page to https://{your host}/web/timelines/home.

Below is a default path actions. They are corresponding the position of tab items.

Path	Description	Default Key
`/web/statuses/new`	Move to 'make a new toot' page	`1`
`/web/timelines/home`	Move to 'home timeline' page	`2`
`/web/notifications`	Move to 'notifications' page	`3`
`/web/timelines/public/local`	Move to 'local timeline' page	`4`
`/web/timelines/public`	Move to 'federated timeline' page	`5`
`/web/getting-started`	Move to 'getting started' page	`6`

If an action name ends with .js, it will run key shortcut plugin (please see below 'Key Shortcut Plugin' section). This plugin feature requires "chromium_sandbox": true.

By default, some key shortcuts for tab items are set in addition to above table.

Example of configuration


{
  "hot_key": "F8",
  "icon_color": "black",
  "always_on_top": false,
  "normal_window": false,
  "zoom_factor": 0.9,
  "chromium_sandbox": true,
  "accounts": [
    {
      "name": "Linda_pp",
      "host": "mstdn.jp",
      "default_page": "/web/timelines/home"
    },
    {
      "name": "inudog",
      "host": "mastodon.social",
      "default_page": "/web/timelines/home"
    }
  ],
  "keymaps": {
    "1": "/web/statuses/new",
    "2": "/web/timelines/home",
    "3": "/web/notifications",
    "4": "/web/timelines/public/local",
    "5": "/web/timelines/public",
    "6": "/web/getting-started",
    "ctrl+1": "/web/statuses/new",
    "ctrl+2": "/web/timelines/home",
    "ctrl+3": "/web/notifications",
    "ctrl+4": "/web/timelines/public/local",
    "ctrl+5": "/web/timelines/public",
    "ctrl+6": "/web/getting-started",
    "j": "scroll-down",
    "k": "scroll-up",
    "i": "scroll-top",
    "m": "scroll-bottom",
    "n": "next-account",
    "p": "prev-account"
  }
}

Multi account

If you set multiple accounts to accounts array in config.json, Accounts menu item will appear in application menu.

It will show the list of your account. Check mark is added for current user. When you click menu item of non-current user, application window will be recreated and switch page to the account.

Key Shortcut Plugin

By specifying JavaScript file to action name in keymaps of config.json, you can write your favorite behavior with JavaScript directly. Please note that "chromium_sandbox" : true is also required (if you don't know what happens with "chromium_sandbox" : true, please read above config section).

{
    ...

    "chromium_sandbox": false,

    ...

    "keymaps": {
        "r": "hello.js"
    }
}

The script file path is a relative path from your Mstdn application directory. For example, Specifying hello.js will run /Users/You/Application Support/Mstdn/hello.js on Mac.

The plugin script MUST export one function. Function receives configuration object and current account object as its parameters. So above hello.js would look like:

module.exports = function (config, account) {
    alert('Hello, ' + account.name);
}

With above example config, typing r will show 'Hello, {your name}' alert dialog. You can use any DOM APIs, Node.js's standard libraries and Electron APIs in plugin script.

User CSS

When user.css is put in your Mstdn application directory, it will be loaded automatically. To enable this feature, "chromium_sandbox" : true is also required (if you don't know what happens with "chromium_sandbox" : true, please read above config section).

For example, below /Users/You/Application Support/Mstdn/user.css will change font color to red on Mac.

body {
  color: red !important;
}

Preload Plugin

You can make a Node.js package which is preloaded before loading inner mastodon page.

Preload plugin is enabled if chromium_sandbox option is set to false. Please read above configuration section before using any plugin.

How to make

Create node_modules directory in your application directory at first. And then, please make mstdn-preload-hello directory. It consists a node package.

Package name must start with mastdn-preload-.

Make package.json manually or by $ npm init in the directory.

{
  "name": "mstdn-preload-hello",
  "version": "0.0.0",
  "description": "sample of preload plugin of Mstdn.app",
  "main": "index.js",
  "author": "Your name",
  "license": "Some license"
}

Finally make index.js as below:

module.exports = (config, account) => {
    console.log('Hello from plugin!', config, account);
}

Package must export one function which receives two parameters config and account.

Note that you can use below APIs in the script.

Node.js standard libraries via require (e.g. require('fs'))
Dependant node packages listed in package.json of the plugin
Electron Renderer APIs
All Web APIs on browser (including DOM API)

!!! Security Notice !!!

Do not leak Node.js stuff to global namespace like below.

// Never do things like this!
window.my_require = require;

How to use

If you didn't try above 'How to make' section, please install plugin package at first. Below will install 'hello' plugin to {app directory}/node_modules/mstdn-preload-hello.

$ cd {Your application directory}
$ npm install mstdn-preload-hello

And then write what plugin should be loaded to "preload" section of your config.json. "hello" should be added to the list.

{
    ...

    "preload" [
        "hello"
    ],

    ...
}

Finally open Mstdn.app and see DevTools via [Menu] -> [View] -> [Developper Tools] -> console. If window is too small to see DevTools, please make window size bigger.

In console, the message 'Hello from plugin!', config information and account information should be output.

List of Plugins

To be made

Contact to the Author

Please feel free to make an issue on GitHub or mention on Mastodon/Twitter.

@Linda_pp@mstdn.jp (Japanese account. English is also OK)
@inudog@mastodon.social (English account)

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