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extension.js
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extension.js
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// The module 'vscode' contains the VS Code extensibility API
// Import the module and reference it with the alias vscode in your code below
const vscode = require('vscode');
// this method is called when your extension is activated
// your extension is activated the very first time the command is executed
function activate(context) {
// 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 "insert-character-above-cursor" 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.registerCommand('extension.insertCharacterAboveCursor', function () {
// current editor
const editor = vscode.window.activeTextEditor;
if (!editor) {
vscode.window.showInformationMessage("Open a file first to work with text");
return;
}
// TODO: check for the empty line and the end of the string?
// TODO: introduce the option to insert words instead of characters
// the Position object gives you the line and character where the cursor is
const position = editor.selection.active;
// check if the current line is not the first one
if (position.line) {
// the position above the cursor
const abovePosition = position.translate(-1, 0);
const abovePositionNext = position.translate(-1, +1);
const myRange = new vscode.Range(abovePosition, abovePositionNext);
editor.edit((editBuilder) => {
editBuilder.insert(position, editor.document.getText(myRange));
}).then(() => {
// console.log('Edit applied!');
}, (err) => {
console.log("Edit rejected!");
console.error(err);
});
} else {
console.log("There is no character above cursor");
}
});
context.subscriptions.push(disposable);
}
exports.activate = activate;
// this method is called when your extension is deactivated
function deactivate() {
}
exports.deactivate = deactivate;