5.2.2.12 type="..." attribute (text, password, submit, reset, hidden, button)

The tag determines the generated name (5.2.2.5) from the name related attributes.

To determine the generated value (5.2.2.10) attribute the tag first looks for an expr (5.2.2.3) attribute, then a value attribute, and then if that fails it looks up the generated name in the execution context.

If the generated name contains a non-empty value it will be written as the name attribute. If the generated value is not None it will be escaped and written as the value attribute. Escaping values makes all &, <, >, and " characters safe.

For example:

>>> import albatross
>>> class Ctx(albatross.SimpleContext):
...     def input_add(self, *args):
...         print args
... 
>>> ctx = Ctx('.')
>>> ctx.locals.zero = 0
>>> ctx.locals.zerostr = '0'
>>> ctx.locals.width = 5
>>> ctx.locals.height = 7
>>> ctx.locals.secret = 42
>>> ctx.locals.other_secret = '<"&'
>>> albatross.Template(ctx, '<magic>', '''
... <al-input name="zero" whitespace>
... <al-input name="zerostr" whitespace>
... <al-input name="width" whitespace>
... <al-input name="area" expr="width * height" whitespace>
... <al-input type="password" name="passwd" whitespace>
... <al-input type="submit" name="login" value="Login" whitespace>
... <al-input type="hidden" name="secret" whitespace>
... <al-input type="hidden" name="other_secret" whitespace>
... ''').to_html(ctx)
('text', 'zero', 0, 0)
('text', 'zerostr', '0', 0)
('text', 'width', 5, 0)
('text', 'area', 35, 0)
('password', 'passwd', None, 0)
('submit', 'login', 'Login', 0)
('hidden', 'secret', 42, 0)
('hidden', 'other_secret', '<"&', 0)
>>> ctx.flush_content()
<input name="zero" value="0">
<input name="zerostr" value="0">
<input name="width" value="5">
<input name="area" value="35">
<input type="password" name="passwd">
<input type="submit" name="login" value="Login">
<input type="hidden" name="secret" value="42">
<input type="hidden" name="other_secret" value="&lt;&quot;&amp;">

After writing all tag attributes the execution context input_add() method is called with the arguments; input field type ('text', 'password, 'submit, 'reset, 'hidden, or 'button'), the generated name, the generated value, and a flag indicating whether or not the list (5.2.2.4) attribute was present.