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hoborapidtaglibrary.lyx
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#LyX 2.0 created this file. For more info see http://www.lyx.org/
\lyxformat 413
\begin_document
\begin_header
\textclass hobo
\use_default_options true
\master hobo.lyx
\begin_modules
logicalmkup
\end_modules
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\language english
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\cite_engine basic
\use_bibtopic false
\use_indices false
\paperorientation portrait
\suppress_date false
\use_refstyle 1
\boxbgcolor #e7e7e7
\index Index
\shortcut idx
\color #008000
\end_index
\secnumdepth 3
\tocdepth 3
\paragraph_separation skip
\defskip smallskip
\quotes_language english
\papercolumns 1
\papersides 1
\paperpagestyle default
\bullet 1 0 9 -1
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\tracking_changes false
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\end_header
\begin_body
\begin_layout Chapter
Chapter 14
\begin_inset Newline newline
\end_inset
THE HOBO RAPID TAG LIBRARY
\end_layout
\begin_layout Standard
This section of the book serves as reference for all of the pre-defined
DRYML tags used by Hobo to provide the “magic” rendering of pages and forms
without you coding.
You can learn how to extend and use these tags to customize your applications.
\end_layout
\begin_layout Standard
Look at the figure below that shows the contents of
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
rapid.dryml
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\end_inset
\end_layout
\begin_layout Plain Layout
\end_layout
\end_inset
\end_layout
\begin_layout Standard
You see how the rapid.dryml file includes the following source files, in
alphabetical order:
\end_layout
\begin_layout LyX-Code
rapid_core.dryml
\end_layout
\begin_layout LyX-Code
rapid_document_tags.dryml
\end_layout
\begin_layout LyX-Code
rapid_pages.dryml
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rapid_editng.dryml
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rapid_forms.dryml
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rapid_navigation.dryml
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\begin_layout LyX-Code
rapid_plus.dryml
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rapid_generics.dryml
\end_layout
\begin_layout LyX-Code
rapid_lifecycles.dryml
\end_layout
\begin_layout LyX-Code
rapid_support.dryml
\end_layout
\begin_layout Section*
Rapid Tag Library Index
\end_layout
\begin_layout Standard
The following categories will be described in detail in the rest of this
chapter:
\end_layout
\begin_layout Standard
\begin_inset Tabular
<lyxtabular version="3" rows="14" columns="2">
<features tabularvalignment="middle">
<column alignment="left" valignment="top" width="20col%">
<column alignment="left" valignment="top" width="80col%">
<row>
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\begin_layout Plain Layout
Core
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</cell>
<cell alignment="left" valignment="top" topline="true" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Core DRYML tags.
These are included implicitly and are always available.
Contains mainly control-flow tags.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
This taglib does not define tags - it just includes all the other taglibs.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Core
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Core Rapid tags and tags that don’t belong to other categories.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Document Tags
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Extra tags for semantic markup.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Editing
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Editing provides “in-place” or “AJAX” editors for various basic data
types.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Forms
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Forms provides various tags that make it quick and easy to produce
working new or edit forms.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Generics
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Generics provides tags that provide generic renderings that can adapt
to the model being rendered.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Lifecycles
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Contains view-layer support for Hobo’s lifecycles.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Navigation
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Support for navigation links, account navigation (log in, out etc.) and paginatio
n navigation.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Pages
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid-Pages provides tags for working with entire pages.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Plus
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Tags that define higher level interactive ‘widgets’
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Summary
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
A collection of tags that allow an application outline or summary to be
created.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Support
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid Support is the home for some tags that are useful in defining other
tags.
\end_layout
\end_inset
</cell>
</row>
<row>
<cell alignment="left" valignment="top" bottomline="true" leftline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid User Pages
\end_layout
\end_inset
</cell>
<cell alignment="left" valignment="top" bottomline="true" rightline="true" usebox="none">
\begin_inset Text
\begin_layout Plain Layout
Rapid User Pages contains tags that implement the basics of Hobo’s user
management: log in, sign up, forgot password etc.
\end_layout
\end_inset
</cell>
</row>
</lyxtabular>
\end_inset
\end_layout
\begin_layout Section
Core
\end_layout
\begin_layout Standard
Core DRYML tags.
These are included implicitly and are always available.
Contains mainly control-flow tags.
\end_layout
\begin_layout LyX-Code
<call-tag>
\end_layout
\begin_layout LyX-Code
<wrap>
\end_layout
\begin_layout LyX-Code
<partial>
\end_layout
\begin_layout LyX-Code
<repeat>
\end_layout
\begin_layout LyX-Code
<do>
\end_layout
\begin_layout LyX-Code
<with>
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\begin_layout LyX-Code
<if>
\end_layout
\begin_layout LyX-Code
<else>
\end_layout
\begin_layout LyX-Code
<unless>
\end_layout
\begin_layout Subsubsection*
<call-tag>
\end_layout
\begin_layout Standard
Call the tag given by the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
tag
\end_layout
\end_inset
attribute.
This lets you call tags dynamically based on some runtime value.
It’s the DRYML equivalent of Ruby’s
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
send
\end_layout
\end_inset
method.
\end_layout
\begin_layout Subsubsection*
<wrap>
\end_layout
\begin_layout Standard
Wrap the body in the tag specified by the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
tag
\end_layout
\end_inset
attribute, if
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
when
\end_layout
\end_inset
is true.
Using regular DRYML conditional logic it is rather awkward to conditionally
wrap some tag in another tag.
This tag makes it easy to do that.
\end_layout
\begin_layout Standard
\begin_inset Flex Emph
status collapsed
\begin_layout Plain Layout
Usage
\end_layout
\end_inset
\end_layout
\begin_layout Standard
For example, you might want to wrap an
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<img>
\end_layout
\end_inset
tag in an
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<a>
\end_layout
\end_inset
tag but only under certain conditions.
Say the current context has an
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
href
\end_layout
\end_inset
attribute that may or may not be nil.
We want to wrap the img in
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<a>
\end_layout
\end_inset
if
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
href
\end_layout
\end_inset
is not nil:
\end_layout
\begin_layout Standard
\begin_inset Box Shadowbox
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "110col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout LyX-Code
\noindent
\align left
<wrap when="&this.href.present?" tag="a" href="&this.href">
\end_layout
\begin_layout LyX-Code
\noindent
\align left
<img src="&this.img_filename"/>
\end_layout
\begin_layout LyX-Code
\noindent
\align left
</wrap>
\end_layout
\end_inset
\end_layout
\begin_layout Subsubsection*
<partial>
\end_layout
\begin_layout Standard
DRYML version of
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
render(:partial => 'my_partial')
\end_layout
\end_inset
\end_layout
\begin_layout Standard
\begin_inset Flex Emph
status collapsed
\begin_layout Plain Layout
Usage
\end_layout
\end_inset
\end_layout
\begin_layout Standard
\begin_inset Box Shadowbox
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "110col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout LyX-Code
<partial name="my-partial" locals="&{:x => 10, :y => 20}"/>
\end_layout
\end_inset
\end_layout
\begin_layout Subsubsection*
<repeat>
\end_layout
\begin_layout Standard
Repeat a section of mark-up.
The context should be a collection (anything that responds to
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
each
\end_layout
\end_inset
).
The content of the call to
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<repeat>
\end_layout
\end_inset
will be repeated for each item in the collection, and the context will
be set to each item in turn.
\end_layout
\begin_layout Standard
\begin_inset Flex Emph
status collapsed
\begin_layout Plain Layout
Attributes
\end_layout
\end_inset
\end_layout
\begin_layout Itemize
join: The value of this attribute, if given, will be inserted between each
of the items (e.g.
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
join=", "
\end_layout
\end_inset
is very common).
\end_layout
\begin_layout Subsubsection*
<do>
\end_layout
\begin_layout Standard
The ‘do nothing’ tag.
Used to add parameters or change context without adding any markup
\end_layout
\begin_layout Subsubsection*
<with>
\end_layout
\begin_layout Standard
Alias of do
\end_layout
\begin_layout Subsubsection*
<if>
\end_layout
\begin_layout Quote
DRYML’s ‘if’ test
\end_layout
\begin_layout Standard
\begin_inset Flex Emph
status collapsed
\begin_layout Plain Layout
Usage
\end_layout
\end_inset
\end_layout
\begin_layout Standard
\begin_inset Box Shadowbox
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "100col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout LyX-Code
<if test="¤t_user.administrator?">
\end_layout
\begin_layout LyX-Code
Logged in as administrator
\end_layout
\begin_layout LyX-Code
</if>
\end_layout
\begin_layout LyX-Code
<else>
\end_layout
\begin_layout LyX-Code
Logged in as normal user
\end_layout
\begin_layout LyX-Code
</else>
\end_layout
\end_inset
\end_layout
\begin_layout Standard
\begin_inset Box Shaded
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "100col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout Plain Layout
Note:
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
<if>
\end_layout
\end_inset
tests for non-blank vs.
blank (as defined by ActiveSupport), not true vs.
false.
If you do not give the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
test
\end_layout
\end_inset
attribute, uses the current context instead.
This allows a nice trick like this:
\end_layout
\end_inset
\end_layout
\begin_layout Standard
\begin_inset Box Shadowbox
position "t"
hor_pos "c"
has_inner_box 1
inner_pos "t"
use_parbox 0
use_makebox 0
width "100col%"
special "none"
height "1in"
height_special "totalheight"
status open
\begin_layout LyX-Code
<if:comments>...</if>
\end_layout
\end_inset
\end_layout
\begin_layout Standard
This has the double effect of changing the context to the
\begin_inset Flex Code
status collapsed
\begin_layout Plain Layout
this.comments
\end_layout
\end_inset
, and only evaluating the body if there are comments (because an empty collectio
n is considered blank)
\end_layout
\begin_layout Subsubsection*
<else>
\end_layout