ADD: add global funcion in Jinja env

.gitignore

@@ -8,3 +8,4 @@ Eel.egg-info
 *.swp
 venv/
 .tox
+/env

eel/__init__.py

@@ -41,6 +41,7 @@
     'port':             8000,                       # Port used for Bottle server (use 0 for auto)
     'block':            True,                       # Whether start() blocks calling thread
     'jinja_templates':  None,                       # Folder for jinja2 templates
+    'jinja_global':     None,                       # Dict with association globalKey -> globalFunction
     'cmdline_args':     ['--disable-http-cache'],   # Extra cmdline flags to pass to browser start
     'size':             None,                       # (width, height) of main window
     'position':         None,                       # (left, top) of main window
@@ -153,6 +154,10 @@ def start(*start_urls, **kwargs):
         _start_args['jinja_env'] = Environment(loader=FileSystemLoader(templates_path),
                                  autoescape=select_autoescape(['html', 'xml']))
 
+        if _start_args['jinja_global'] != None:
+            for key in _start_args['jinja_global'].keys():
+                _start_args['jinja_env'].globals[key] = _start_args['jinja_global'][key]
+
 
     # Launch the browser to the starting URLs
     show(*start_urls)

examples/06 - jinja_templates/hello.py

@@ -15,4 +15,8 @@ def say_hello_py(x):
 say_hello_py('Python World!')
 eel.say_hello_js('Python World!')   # Call a Javascript function
 
-eel.start('templates/hello.html', size=(300, 200), jinja_templates='templates')    # Start
+def say_hello_jinja(x):
+    print('Hello from %s' % x)
+    return ""
+
+eel.start('templates/hello.html', size=(300, 200), jinja_templates='templates', jinja_global={"say_hello_jinja": say_hello_jinja})    # Start

examples/06 - jinja_templates/web/templates/hello.html

@@ -1,6 +1,6 @@
-{% extends 'base.html' %} 
+{% extends 'base.html' %}
 {% block title %}Hello, World!{% endblock %}
-{% block head_scripts %}        
+{% block head_scripts %}
     eel.expose(say_hello_js);               // Expose this function to Python
         function say_hello_js(x) {
         console.log("Hello from " + x);
@@ -16,12 +16,13 @@
     }
 
     eel.py_random()(print_num);
-        
+
     say_hello_js("Javascript World!");
     eel.say_hello_py("Javascript World!");  // Call a Python function
 {% endblock %}
 {% block content %}
     Hello, World!
     <br />
     <a href="page2.html">Page 2</a>
+    {% set hello = say_hello_jinja("Jinja World!") %}
 {% endblock %}