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authormensonge <mensonge@b3834d28-1941-0410-a4f8-b48e95affb8f>2008-11-13 09:49:11 +0000
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New feature: basic Ajax suggestion for tags and implementation of Dojo toolkit
git-svn-id: https://semanticscuttle.svn.sourceforge.net/svnroot/semanticscuttle/trunk@151 b3834d28-1941-0410-a4f8-b48e95affb8f
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+-------------------------------------------------------------------------------
+DojoX Django Template Language
+-------------------------------------------------------------------------------
+Version 0.0
+Release date: 09/20/2007
+-------------------------------------------------------------------------------
+Project state: experimental/feature incomplete
+-------------------------------------------------------------------------------
+Project authors
+ Neil Roberts (pottedmeat@dojotoolkit.org)
+-------------------------------------------------------------------------------
+Project description
+
+The Django Template language uses a system of templates that can be compiled
+once and rendered indefinitely afterwards. It uses a simple system of tags
+and filters.
+
+This is a 1:1 match with the Django Template Language as outlined in
+http://www.djangoproject.com/documentation/templates/. All applicable tags and
+filters have been implemented (see below), along with new filters and tags as
+necessary (see below).
+
+The Django Template Language is intended within Django to only handle text.
+Our implementation is able to handle HTML in addition to text. Actually, the
+text and HTML portions of dojox.dtl are two separate layers, the HTML layer
+sits on top of the text layer (base). It's also been implemented in such a way
+that you have little to fear when moving your code from Django to dojox.dtl.
+Your existing templates should work, and will benefit from the massive
+performance gain of being able to manipulate nodes, rather than having to do
+clunky innerHTML swaps you would have to do with a text-only system. It also
+allows for new HTML-centric abilities, outlined below.
+
+Despite having two levels of complexity, if you write your tags correctly, they
+will work in both environments.
+-------------------------------------------------------------------------------
+Dependencies
+
+Base:
+dojox.string.Builder
+
+Date filters and tags:
+dojox.date.php
+
+Widget:
+dijit._Widget
+dijit._Container
+-------------------------------------------------------------------------------
+Installation instructions
+
+Grab the following from the Dojo SVN Repository:
+http://svn.dojotoolkit.org/var/src/dojo/dojox/trunk/dtl.js
+http://svn.dojotoolkit.org/var/src/dojo/dojox/trunk/dtl/*
+
+Install into the following directory structure:
+/dojox/dtl/
+
+...which should be at the same level as your Dojo checkout.
+-------------------------------------------------------------------------------
+What's Been Done
+
+Note: HTML Unit Tests should only be around for the oddities of HTML, tag/filter
+code is the same for each environment with minor exceptions. Cloning of all tags
+should be tested inside a for loop.
+
+| Implemented | Tag | Text Unit Test | HTML Unit Test |
+| X | block | X | |
+| X | comment | X | |
+| X | cycle | X | |
+| X | debug | X | |
+| X | extends | X | |
+| X | filter | X | |
+| X | firstof | X | |
+| X | for | X | |
+| X | if | X | |
+| X | ifchanged | X | X |
+| X | ifequal | X | |
+| X | ifnotequal | X | |
+| X | include | X | X |
+| X | load | X | |
+| X | now | X | |
+| X | regroup | X | |
+| X | spaceless | X | X |
+| X | ssi | X | X |
+| X | templatetag | X | |
+| N/A | url | | |
+| X | widthratio | X | |
+| X | with | X | |
+
+| Implemented | Filter | Text Unit Test | HTML Unit Test |
+| X | add | X | |
+| X | addslashes | X | |
+| X | capfirst | X | |
+| X | center | X | |
+| X | cut | X | |
+| X | date | X | |
+| X | default | X | |
+| X | default_if_none | X | |
+| X | dictsort | X | |
+| X | dictsort_reversed | X | |
+| X | divisibleby | X | |
+| X | escape | X | |
+| X | filesizeformat | X | |
+| X | first | X | |
+| X | fix_ampersands | X | |
+| X | floatformat | X | |
+| X | get_digit | X | |
+| X | iriencode | X | |
+| X | join | X | |
+| X | length | X | |
+| X | length_is | X | |
+| X | linebreaks | X | |
+| X | linebreaksbr | X | |
+| X | linenumbers | X | |
+| X | ljust | X | |
+| X | lower | X | |
+| X | make_list | X | |
+| X | phone2numeric | X | |
+| X | pluralize | X | |
+| X | pprint | X | |
+| X | random | X | |
+| X | removetags | X | |
+| X | rjust | X | |
+| X | slice | X | |
+| X | slugify | X | |
+| X | stringformat | X | |
+| X | striptags | X | |
+| X | time | X | |
+| X | timesince | X | |
+| X | timeuntil | X | |
+| X | title | X | |
+| X | truncatewords | X | |
+| X | truncatewords_html | X | |
+| X | unordered_list | X | |
+| X | upper | X | |
+| X | urlencode | X | |
+| X | urlize | X | |
+| X | urlizetrunc | X | |
+| X | wordcount | X | |
+| X | wordwrap | X | |
+| X | yesno | X | |
+-------------------------------------------------------------------------------
+HTML-Specific Additions
+-------------------------------------------------------------------------------
+{%extends "shared:templates/template.html" %}
+
+When using the {% extends %} tag, we don't always want to replace the parent
+node in DOM. For example, if we have a list view and a detail view, but both
+share the same base template, we want it to share the parent template. This
+basically means that the same nodes will be used in the parent for both views.
+
+To use this, simply add "shared:" to the beginning of the specified template.
+-------------------------------------------------------------------------------
+<!--{% commented markup %}-->
+
+Some browsers treat comment nodes as full fledged nodes. If performance is
+important to you, you can wrap your markup in comments. The comments will be
+automatically stripped for browsers that cannot support this.
+-------------------------------------------------------------------------------
+Attribute Tags
+
+If a tag name begins with "attr:" then it will be able to inject an object
+into the parsed template. (See dojox.dtl.tag.event.EventNode)
+
+onclick/onmouseover/etc attributes work by attaching to the rendering object.
+
+tstyle attribute allows for styles to be changed dynamically. Use them just
+like a "style" attribute.
+
+attach attribute attaches the node to the rendering object.
+-------------------------------------------------------------------------------
+New Context Functions
+
+setThis() and getThis() returns the object "in charge" of the current rendering.
+This is used so that we can attach events.
+
+mixin() and filter() clone the current context, and either add to or reduce
+the keys in the context.
+-------------------------------------------------------------------------------
+Buffers
+
+Both the base and HTML versions of dojox.dtl use buffers. The base version uses
+dojox.string.Builder and the HTML version uses dojox.dtl.HtmlBuffer.
+
+The HTML buffer has several calls important to rendering:
+
+setParent/getParent/concat/remove:
+
+setParent and concat are used in order to render our HTML. As we move through
+the parsed template, different nodes change the parent or add on to the
+current parent. getParent is useful in things like the attribute tags, since
+they can use getParent to find the node that they're an attribute on. remove is
+used during unrendering.
+
+setAttribute:
+
+Sets an attribute on the current parent
+-------------------------------------------------------------------------------
+Tags Need clone/unrender Functions.
+
+One of the biggest challenges of getting dojox.dtl to work in an HTML
+environment was logic blocks. Nodes and objects inside a for loop need to be
+cloned, they can't simply be re-rendered, especially if they involve a Node.
+Also, in the case of an if/else block, we need to be able to not just render
+one of the blocks, but also unrender the second.
+
+This is really simple code, a good example is the dojox.dtl.HtmlNode
+object. Each function in this object is only one line long. \ No newline at end of file