potential implementation for #12

README.md

@@ -19,4 +19,5 @@ install the server extension, and add the following to `jupyter_notebook_config.
 
 ```python3
 c.JupyterLabIFrame.iframes = ['list', 'of', 'sites']
+c.JupyterLabIFrame.welcome = 'a site'
 ```

jupyterlab_iframe/extension.py

@@ -4,11 +4,12 @@ from notebook.utils import url_path_join
 
 
 class IFrameHandler(IPythonHandler):
-    def initialize(self, iframes=None):
-        self.iframes = iframes
+    def initialize(self, welcome=None, sites=None):
+        self.sites = sites
+        self.welcome = welcome
 
     def get(self):
-        self.finish(ujson.dumps(self.iframes))
+        self.finish(ujson.dumps({'welcome': self.welcome or '', 'sites': self.sites}))
 
 
 def load_jupyter_server_extension(nb_server_app):
@@ -19,11 +20,13 @@ def load_jupyter_server_extension(nb_server_app):
         nb_server_app (NotebookWebApplication): handle to the Notebook webserver instance.
     """
     web_app = nb_server_app.web_app
-    iframes = nb_server_app.config.get('JupyterLabIFrame', {}).get('iframes', [])
+    sites = nb_server_app.config.get('JupyterLabIFrame', {}).get('iframes', [])
+    welcome = nb_server_app.config.get('JupyterLabIFrame', {}).get('welcome', [])
+
     host_pattern = '.*$'
     base_url = web_app.settings['base_url']
 
     print('Installing jupyterlab_iframe handler on path %s' % '/iframes')
-    print('Handinling iframes: %s' % iframes)
+    print('Handling iframes: %s' % sites)
 
-    web_app.add_handlers(host_pattern, [(url_path_join(base_url, '/iframes'), IFrameHandler, {'iframes': iframes})])
+    web_app.add_handlers(host_pattern, [(url_path_join(base_url, '/iframes'), IFrameHandler, {'welcome': welcome, 'sites': sites})])

package.json

@@ -1,6 +1,6 @@
 {
   "name": "jupyterlab_iframe",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "A JupyterLab extension.",
   "author": "Tim Paine",
   "main": "lib/index.js",

setup.py

@@ -9,11 +9,11 @@ with open(path.join(here, 'README.md'), encoding='utf-8') as f:
 
 setup(
     name='jupyterlab_iframe',
-    version='0.0.2',
+    version='0.0.3',
     description='IFrame widgets for JupyterLab',
     long_description=long_description,
     url='https://github.com/timkpaine/jupyterlab_iframe',
-    download_url='https://github.com/timkpaine/jupyterlab_iframe/archive/v0.0.2.tar.gz',
+    download_url='https://github.com/timkpaine/jupyterlab_iframe/archive/v0.0.3.tar.gz',
     author='Tim Paine',
     author_email='t.paine154@gmail.com',
     license='GPL',

src/index.ts

@@ -67,6 +67,22 @@ class OpenIFrameWidget extends Widget {
   }
 }
 
+function registerSite(app: JupyterLab, palette: ICommandPalette, site: string){
+  let command = 'iframe:open-' + site;
+
+  app.commands.addCommand(command, {
+    label: 'Open ' + site,
+    isEnabled: () => true,
+    execute: () => {
+        let widget = new IFrameWidget(site);
+        app.shell.addToMainArea(widget);
+        app.shell.activateById(widget.id);
+    }
+  });
+  palette.addItem({command: command, category: 'Sites'});
+}
+
+
 function activate(app: JupyterLab, docManager: IDocumentManager, palette: ICommandPalette, restorer: ILayoutRestorer) {
 
   // Declare a widget variable
@@ -117,21 +133,30 @@ function activate(app: JupyterLab, docManager: IDocumentManager, palette: IComma
   xhr.onload = function (e:any) {
     if (xhr.readyState === 4) {
       if (xhr.status === 200) {
-        let sites = JSON.parse(xhr.responseText);
+        let jsn = JSON.parse(xhr.responseText);
+        let welcome = jsn['welcome'];
+        let welcome_included = false;
+
+        let sites = jsn['sites'];
+
         for(let site of sites){
           console.log('adding quicklink for ' + site);
-          let command = 'iframe:open-' + site;
-          app.commands.addCommand(command, {
-            label: 'Open ' + site,
-            isEnabled: () => true,
-            execute: () => {
-                widget = new IFrameWidget(site);
-                app.shell.addToMainArea(widget);
-                app.shell.activateById(widget.id);
-            }
-          });
-          palette.addItem({command: command, category: 'Sites'});
+
+          if (site == welcome){
+            welcome_included = true;
+          }
+          registerSite(app, palette, site);
         }
+
+        if (!welcome_included){
+          registerSite(app, palette, welcome);
+        }
+        if (welcome) {
+          app.restored.then(() => {
+            app.commands.execute('iframe:open-' + welcome);
+          });
+        }
+
       } else {
         console.error(xhr.statusText);
       }