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Support having the same formatter for multiple languages without specifying the command multiple times #15

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wdomitrz wants to merge 2 commits into from
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Support having the same formatter for multiple languages without specifying the command multiple times #15

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cfafcbf
support multiple languages
wdomitrz Aug 30, 2025
9003174
update readme
wdomitrz Aug 30, 2025
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8 changes: 4 additions & 4 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -20,14 +20,14 @@ Populate the `custom-format.formatters` setting.
// Create our custom formatters
"custom-format.formatters": [
{
// Whatever language id you need to format
"language": "javascript",
// Whatever language id you need to format - or a list of languages
"language": ["javascript", "typescript"],
// The command that will be run to format files with the language id specified above
"command": "node format.js $FILE" // $FILE is replaced with the path of the file to be formatted
},
{
"language": "typescript",
"command": "node format-ts.js"
"language": "html",
"command": "node format-html.js"
}
],

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38 changes: 21 additions & 17 deletions src/extension.ts
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Expand Up @@ -7,7 +7,7 @@ import { runCommand } from './run-command'

interface Formatter {
command: string
language: string
language: string | string[]
}

export function activate(context: ExtensionContext) {
Expand Down Expand Up @@ -42,27 +42,31 @@ export function activate(context: ExtensionContext) {
break
}

let disposable = languages.registerDocumentFormattingEditProvider(formatter.language, {
async provideDocumentFormattingEdits(document: TextDocument): Promise<TextEdit[]> {
const rawText = document.getText()
const filename = document.uri.fsPath
const workspaceDir = getCwd(filename)
const formattedText = await runCommand(rawText, formatter.command, filename, workspaceDir)
const languages = Array.isArray(formatter.language) ? formatter.language : [formatter.language]

const lastLineNumber = document.lineCount - 1
const lastLineChar = document.lineAt(lastLineNumber).text.length
for (let language of languages) {
let disposable = languages.registerDocumentFormattingEditProvider(language, {
async provideDocumentFormattingEdits(document: TextDocument): Promise<TextEdit[]> {
const rawText = document.getText()
const filename = document.uri.fsPath
const workspaceDir = getCwd(filename)
const formattedText = await runCommand(rawText, formatter.command, filename, workspaceDir)

const startPos = new Position(0, 0)
const endPos = new Position(lastLineNumber, lastLineChar)
const replaceRange = new Range(startPos, endPos)
const lastLineNumber = document.lineCount - 1
const lastLineChar = document.lineAt(lastLineNumber).text.length

return [TextEdit.replace(replaceRange, formattedText)]
},
})
const startPos = new Position(0, 0)
const endPos = new Position(lastLineNumber, lastLineChar)
const replaceRange = new Range(startPos, endPos)

listeningLanguages.push(formatter.language)
return [TextEdit.replace(replaceRange, formattedText)]
},
})

context.subscriptions.push(disposable)
listeningLanguages.push(language)

context.subscriptions.push(disposable)
}
}

log(`Formatting activated for the following languages: [${listeningLanguages.toLocaleString()}]`)
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