const vscode = require('vscode');
let _context;
let panel;
const previewKey = 'savedPreviewUrl'; // Key to store last opened URL
const previewColumnKey = 'savedPreviewColumn'; // Key to store last panel position
function initFrame(context) {
_context = context;
// Register command to open the preview tab
let disposable = vscode.commands.registerCommand('itk.openPreview', async () => {
const url = await vscode.window.showInputBox({
prompt: 'Enter the URL to preview',
placeHolder: 'https://example.com'
});
if (url) {
runFrame(url);
}
});
context.subscriptions.push(disposable);
// Restore last opened preview on activation
const savedUrl = context.globalState.get(previewKey);
const savedColumn = context.globalState.get(previewColumnKey) || vscode.ViewColumn.One;
if (savedUrl) {
runFrame(savedUrl, savedColumn);
}
}
// Function to open a WebView preview
function runFrame(url, column = vscode.ViewColumn.Active) {
let globalState = _context.globalState;
if (panel) {
// If panel exists, update the content and restore position
panel.webview.html = getWebviewContent(url);
panel.reveal(column);
} else {
// Create a new WebView panel in the last known position
panel = vscode.window.createWebviewPanel(
'webPreview',
'Web Preview',
column,
{ enableScripts: true }
);
panel.webview.html = getWebviewContent(url);
// Save URL & position for persistence
globalState.update(previewKey, url);
globalState.update(previewColumnKey, column);
// Track panel movement
panel.onDidChangeViewState(e => {
if (panel.visible) {
globalState.update(previewColumnKey, panel.viewColumn);
}
});
// Handle WebView disposal (clear references)
panel.onDidDispose(() => {
panel = null;
globalState.update(previewKey, undefined);
globalState.update(previewColumnKey, undefined);
});
}
global.backupTabs && global.backupTabs();
}
// Generate HTML content with an iframe
function getWebviewContent(url) {
return `
Web Preview
`;
}
function getCurrentPreviewState() {
return {
url: _context.globalState.get(previewKey),
group: _context.globalState.get(previewColumnKey) || vscode.ViewColumn.One
}
}
module.exports = { initFrame, runFrame, getCurrentPreviewState };