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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');
function info() { vscode.window.showInformationMessage(arguments); }
function warning() { vscode.window.showWarningMessage(arguments); }
function error() { vscode.window.showErrorMessage(arguments); }
function objectFromSelection(editor) {
let selection = editor.selection;
let json = editor.document.getText(selection);
let obj;
try {
obj = JSON.parse(json);
}
catch(err) {
obj = undefined;
warning('JSON Flattener: Selection is not valid JSON: ', err.message);
}
return obj;
}
function replaceSelection(editor, text) {
let selection = editor.selection;
editor.edit(builder => {
builder.replace(selection, text);
})
.then(success => {
if (success) {
// Change the selection: start and end position of the new
// selection is same, so it is not to select replaced text;
var position = editor.selection.end;
// editor.selection = new vscode.Selection(position, position); // deselect
editor.revealRange(new vscode.Range(position, position)); // show cursor at end of old selection
info('JSON Flattener: selection contents flattened: '+success);
}
});
}
function isEmptyObject(obj) {
for (var k in obj) {
return false;
}
return true;
}
// Accumulates a deeply-nested object as items into array 'acc', recursively. Lines are later inserted.
// An array is used to avoid excessive reconcatenation with a bunch of temp objects as one long string.
function objToFlatArray(obj, acc, separators, prefix) {
let t = (Array.isArray(obj)) ? 'array' : typeof obj;
if (t === 'array') {
// Special cases first for empty enumerables
if (obj.length === 0) {
acc.push(` "${prefix}": []`)
}
else {
for (const k in obj) {
if (obj.hasOwnProperty(k)) {
objToFlatArray(
obj[k],
acc,
separators,
`${prefix ? prefix + separators.arrL : ''}${k}${prefix ? separators.arrR : ''}`
)
}
}
}
}
else if (t === 'object') {
if (isEmptyObject(obj)) {
acc.push(` "${prefix}": {}`)
}
else {
for (const k in obj) {
if (obj.hasOwnProperty(k)) {
objToFlatArray(
obj[k],
acc,
separators,
`${prefix ? prefix + separators.obj : ''}${k}`
)
}
}
}
}
else if (t == 'string') {
acc.push(` "${prefix}": ${JSON.stringify(obj)}`)
}
else if (t == 'boolean') {
acc.push(` "${prefix}": ${obj}`)
}
else {
acc.push(` "${prefix}": ${obj}`)
}
}
/**************************************************/
function selectionFlatten (style) {
let editor = vscode.window.activeTextEditor;
if (!editor) return; // No text editor open
let obj = objectFromSelection(editor);
if (!obj) return; // already reported
let flatArray = [];
let separators = { // styles
// appurist.json-flattener.selection
'.': {
'obj': '.',
'arrL': '.',
'arrR': '',
},
// appurist.json-flattener.selection-dotnet
'__': {
'obj': '__',
'arrL': '__',
'arrR': '',
},
// appurist.json-flattener.selection-javascript
'js': {
'obj': '.',
'arrL': '[',
'arrR': ']',
},
}
objToFlatArray(obj, flatArray, separators[style]);
let flatJSON = '{\n' + flatArray.join(',\n') + '\n}';
return replaceSelection(editor, flatJSON);
}
// Command 2: appurist.json-flattener.pretty
// Command 3: appurist.json-flattener.unpretty
function selectionPretty (makePretty) {
let editor = vscode.window.activeTextEditor;
if (!editor) return; // No open text editor
let obj = objectFromSelection(editor);
if (!obj) return; // already reported
let json2 = JSON.stringify(obj, undefined, makePretty ? 2 : undefined);
replaceSelection(editor, json2);
}
// Command 4: appurist.json-flattener.clipboard
async function clipboardFlatten () {
let json;
let lines = await vscode.env.clipboard.readText();
if (lines) {
if (Array.isArray(json)) {
json = lines.join(' ');
} else
if (typeof lines == 'string')
{
json = lines.trim();
} else {
error('JSON Flattener: Unrecognized clipboard type: '+typeof lines)
return;
}
}
let obj;
try {
obj = JSON.parse(json);
}
catch(err) {
warning('JSON Flattener: Clipboard is not valid JSON: ', err.message);
return;
}
let json2 = JSON.stringify(obj);
let success = await vscode.env.clipboard.writeText(json2);
if (!success)
error('JSON Flattener: Could not replace clipboard.');
}
/**************************************************
* @param {vscode.ExtensionContext} context
*/
function activate(context) {
let disposable;
// 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('Extension json-flattener: active.');
// These commands have been defined in the package.json file.
// Now we provide the implementation of the command with registerCommand().
// The commandId parameter must match the command field in package.json.
// Command 1: appurist.json-flattener.selection
disposable = vscode.commands.registerCommand('appurist.json-flattener.selection', () => {
selectionFlatten('.');
});
// Command 2: appurist.json-flattener.pretty
disposable = vscode.commands.registerCommand('appurist.json-flattener.pretty', () => {
selectionPretty(true);
});
// Command 3: appurist.json-flattener.unpretty
disposable = vscode.commands.registerCommand('appurist.json-flattener.unpretty', () => {
selectionPretty(false);
});
// Command 4: appurist.json-flattener.clipboard
disposable = vscode.commands.registerCommand('appurist.json-flattener.clipboard', async () => {
await clipboardFlatten();
});
// Command 5: appurist.json-flattener.selection-dotnet
disposable = vscode.commands.registerCommand('appurist.json-flattener.selection-dotnet', () => {
selectionFlatten('__'); // use dotnet separator
});
// Command 6: appurist.json-flattener.selection-javascript
disposable = vscode.commands.registerCommand('appurist.json-flattener.selection-javascript', () => {
selectionFlatten('js'); // use JavaScript array separators
});
context.subscriptions.push(disposable);
}
exports.activate = activate;
// this method is called when your extension is deactivated
function deactivate() {
//console.log('Extension json-flattener: deactivated.');
}
module.exports = {
activate,
deactivate
}