[VSCode: Slasher] TextEditor command extenison for converting between forward and backward slashes in a text selection. #vscode #extension #typescript #command #conversion

vscode_slasher.ts

// The module 'vscode' contains the VS Code extensibility API
// Import the module and reference it with the alias vscode in your code below
import * as vscode from 'vscode';

// this method is called when your extension is activated
// your extension is activated the very first time the command is executed
export function activate(context: vscode.ExtensionContext) {

	// Use the console to output diagnostic information (console.log) and errors (console.error)
	// This line of code will only be executed once when your extension is activated
	console.log('Congratulations, your extension "slasher" is now active!');

	// The command has been defined in the package.json file
	// Now provide the implementation of the command with registerCommand
	// The commandId parameter must match the command field in package.json
	let disposable = vscode.commands.registerTextEditorCommand('extension.slasher', (textEditor, edit) => {
		// The code you place here will be executed every time your command is executed

		const doc = textEditor.document;
		textEditor.selections.forEach((value, index, array) => {
			const range = new vscode.Range(value.start, value.end);
			const text = textEditor.document.getText(range);
			const matchFrontSlashes = text.match(/\//g);
			const matchBackSlashes = text.match(/\\/g);
			let numFrontSlashes = 0;
			let numBackSlashes = 0;
			if (matchFrontSlashes !== null) {
				numFrontSlashes = matchFrontSlashes.length;
			}
			if (matchBackSlashes !== null) {
				numBackSlashes = matchBackSlashes.length;
			}
			const file = vscode.Uri.file(text);
			const path = file.fsPath;
			if (numBackSlashes > numFrontSlashes) {
				edit.replace(range, path.replace(/\\/g, "/"));
			} else if (numFrontSlashes > numBackSlashes) {
				edit.replace(range, path.replace(/\//g, "\\"));
			} else if (numBackSlashes == numFrontSlashes) {
				if (numBackSlashes == 0) {
					vscode.window.showInformationMessage("No slashes detected (not a path?)");
				} else {
					vscode.window.showWarningMessage("Cannot determine intended conversion direction. (reason: path contains front and backslashes of equal amount)");
				}
			}
		})
	});

	context.subscriptions.push(disposable);
}

// this method is called when your extension is deactivated
export function deactivate() {}