create a vscode extension for formatting xaml/axaml

[heartacker]

Is your feature request related to a problem? Please describe. that is great if we can format xaml file in vscode

Describe the solution you'd like execute the xstyle with args -f ${file}

Describe alternatives you've considered

Additional context now, I just create a task name xamlstyler

        {
            "label": "XamlStyler",
            "type": "shell",
            "command": "xstyler",
            "args": [
                "-f",
                "${file}"
            ],
            "problemMatcher": []
        }

and set the keybinding

    {
        "key": "shift+alt+f",
        "command": "workbench.action.tasks.runTask",
        "args": "XamlStyler",
        "when": "resourceExtname == '.xaml'"
    },

> Executing task in folder atcgui: xstyler -f f:\ATCProjectFiles\AutoTool_SVN\atcgui\ATC.TPMS.GUI\AC5111\WinClock.xaml <

Processing: f:\ATCProjectFiles\AutoTool_SVN\atcgui\ATC.TPMS.GUI\AC5111\WinClock.xaml

Processed 1 of 1 files.

终端将被任务重用，按任意键关闭。
```

[grochocki]

Captured workaround in our wiki: Xavalon/XamlStyler/wiki/VSCode

[heartacker]

thanks, and I think we should add "when": "resourceExtname == '.xaml'" to that wiki, Just like I do

[grochocki]

Good catch, thanks! Updated.

[BinToss]

I've been pushing for XAML/AXAML formatting in https://github.com/redhat-developer/vscode-xml, but Xaml Styler has already implemented most–if not all–of ReSharper's XML-formatting rules.

Development of XamlStyler's VSCode extension could go in one of two directions:

• Implement independently and exclusively (i.e. no awareness or integration with other formatting extensions).
  • If multiple formatters are available for the current file's language ID and the user explicitly¹ invokes the editor's Format Document command (Format On Save doesn't count), the user will be prompted to select² a default formatter for the given language ID.
  • A thin wrapper around xamlstyler's console app.
• Integrate with redhat.vscode-xml via its Custom XML Extensions (written in Java). This would require compiling a JAR file to be imported by redhat.vscode-xml's https://github.com/eclipse/lemminx language server. Could XamlStyler's existing Rider extension be dissected for this?

¹ VSCode's Format On Save feature does not trigger the "Configure Default Formatter" prompt. ² The default formatter is saved per language ID in the user's settings (it can be copied to or manually set in the workspace settings i.e. ./.vscode/settings.json or WorkspaceName.code-workspace).

// redhat.vscode-xml set as the default formatter for AXAML, the language ID provided by avaloniateam.vscode-avalonia.
"[AXAML]": {
    "editor.defaultFormatter": "redhat.vscode-xml"
	}

P.S. What would the extension ID be? xavalon.xamlstyler?