#!/usr/bin/env python
#
# HappyDoc:docStringFormat="ClassicStructuredText"
#
"""Classic Structured Text Manipulation
Parse a structured text string into a form that can be used with
structured formats, like html.
Structured text is text that uses indentation and simple symbology
to indicate the structure of a document.
A structured string consists of a sequence of paragraphs separated
by one or more blank lines. Each paragraph has a level which is
defined as the minimum indentation of the paragraph. A paragraph is
a sub-paragraph of another paragraph if the other paragraph is the
last preceding paragraph that has a lower level.
Special symbology is used to indicate special constructs:
- A single-line paragraph whose immediately succeeding paragraphs are lower
level is treated as a header.
- A paragraph that begins with a '-', '*', or 'o' is treated as an
unordered list (bullet) element.
- A paragraph that begins with a sequence of digits followed by a
white-space character is treated as an ordered list element.
- A paragraph that begins with a sequence of sequences, where each
sequence is a sequence of digits or a sequence of letters followed
by a period, is treated as an ordered list element.
- A paragraph with a first line that contains some text, followed by
some white-space and '--' is treated as
a descriptive list element. The leading text is treated as the
element title.
- Sub-paragraphs of a paragraph that ends in the word 'example' or the
word 'examples', or '::' is treated as example code and is output as is.
- Text enclosed single quotes (with white-space to the left of the
first quote and whitespace or punctuation to the right of the second quote)
is treated as example code.
- Text surrounded by '*' characters (with white-space to the left of the
first '*' and whitespace or punctuation to the right of the second '*')
is emphasized.
- Text surrounded by '**' characters (with white-space to the left of the
first '**' and whitespace or punctuation to the right of the second '**')
is made strong.
- Text surrounded by '_' underscore characters (with whitespace to the left
and whitespace or punctuation to the right) is made underlined.
- Text encloded by double quotes followed by a colon, a URL, and concluded
by punctuation plus white space, *or* just white space, is treated as a
hyper link. For example:
"Zope":http://www.zope.org/ is ...
Is interpreted as '<a href="http://www.zope.org/">Zope</a> is ....'
Note: This works for relative as well as absolute URLs.
- Text enclosed by double quotes followed by a comma, one or more spaces,
an absolute URL and concluded by punctuation plus white space, or just
white space, is treated as a hyper link. For example:
"mail me", mailto:amos@digicool.com.
Is interpreted as '<a href="mailto:amos@digicool.com">mail me</a>.'
- Text enclosed in brackets which consists only of letters, digits,
underscores and dashes is treated as hyper links within the document.
For example:
As demonstrated by Smith [12] this technique is quite effective.
Is interpreted as '... by Smith <a href="#12">[12]</a> this ...'. Together
with the next rule this allows easy coding of references or end notes.
- Text enclosed in brackets which is preceded by the start of a line, two
periods and a space is treated as a named link. For example:
.. [12] "Effective Techniques" Smith, Joe ...
Is interpreted as '<a name="12">[12]</a> "Effective Techniques" ...'.
Together with the previous rule this allows easy coding of references or
end notes.
- A paragraph that has blocks of text enclosed in '||' is treated as a
table. The text blocks correspond to table cells and table rows are
denoted by newlines. By default the cells are center aligned. A cell
can span more than one column by preceding a block of text with an
equivalent number of cell separators '||'. Newlines and '|' cannot
be a part of the cell text.
For example::
|||| **Ingredient** ||
|| *Name* || *Amount* ||
||Spam||10||
||Eggs||3||
is interpreted as::
<TABLE BORDER=1 CELLPADDING=2>
<TR>
<TD ALIGN=CENTER COLSPAN=2> <strong>Ingredients</strong> </TD>
</TR>
<TR>
<TD ALIGN=CENTER COLSPAN=1> <em>Name</em> </TD>
<TD ALIGN=CENTER COLSPAN=1> <em>Amount</em> </TD>
</TR>
<TR>
<TD ALIGN=CENTER COLSPAN=1>Spam</TD>
<TD ALIGN=CENTER COLSPAN=1>10</TD>
</TR>
<TR>
<TD ALIGN=CENTER COLSPAN=1>Eggs</TD>
<TD ALIGN=CENTER COLSPAN=1>3</TD>
</TR>
</TABLE>
and appear as:
|||| **Ingredient** ||
|| *Name* || *Amount* ||
||Spam||10||
||Eggs||3||
"""
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