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1824. By wouter bolsterlee on 2011-03-17

[page] Implement AnewtPage::add_conditional_stylesheet()

Add a gross hack to support conditional stylesheets based on
an abuse of XML comment syntax and the IE HTML parser. See
the docs for more information.

1823. By wouter bolsterlee on 2011-03-17

[page] Don't make append() depend on the 'blocks' property

AnewtPage->append() shouldn't depend on the 'blocks'
property to decide which block to append to. Instead, use
the 'default-block' property. This allows custom pages that
override build_body() to still use blocks as before, but
without using the default "list of <div> elements in a
wrapper" implementation that AnewtPage provides.

1822. By wouter bolsterlee on 2011-03-17

[page] Refactor HEAD/BODY building into own methods

This is cleaner, but more importantly allows AnewtPage
descendants to override build_body() for complete
control over the way a page is assembled from its blocks.

1821. By wouter bolsterlee on 2011-03-17

[page] Use XHTML nodes for top level structure

...instead of standard AnewtXMLDomElement instances.

1820. By wouter bolsterlee on 2011-03-17

[xhtml] Add AnewtXHTML{Html,Head,Body} elements

1819. By wouter bolsterlee on 2011-03-17

[page] Add support for a custom wrapper div element

AnewtPage->$wrapper_div can now be set to a custom DOM node.
If not null, this will be used as the wrapper around all
blocks on the page. If null, a new <div> element will be
used; this was the old behaviour and still is the default.

Also remove an unnecessary is_null() check for a line that
is only reached if $name is null.

1818. By wouter bolsterlee on 2011-03-17

[database] Fix SQLite tests

1817. By wouter bolsterlee on 2011-03-17

[form] Fix string casts for multiple select choice controls

The value for AnewtFormControlChoice with the 'multiple'
flag set is an array, not a string. The previous change
casted all values to string, while for multiple select
choice controls this should be done for each value instead.

1816. By wouter bolsterlee on 2011-03-17

[form] Cast choice control values to strings when filling

Make sure choice controls are always filled with string
values. Before this change AnewtFormControlChoice
incorrectly enabled an option with a "" value when the form
was filled with the integer 0 value (even if the choice
control also contained an option with a "0" value). This is
especially problematic in combination with the recently
introduced null-value support.

1815. By wouter bolsterlee on 2011-03-17

[form] Add null-value support to choice control

AnewtFormControlChoice has a new 'null-value' property
(defaults to the empty string). For single-select controls,
this will be used to determine whether the control has a
null value, and can be used for e.g. a "I don't know"
option in a drop down list.

The validation has some simple checks for this, and
get('value') will return null if the special value is
encountered.