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PDF::API2::Basic::TTF::XMLparseUser)Contributed Perl DocumentPDF::API2::Basic::TTF::XMLparse(3pm)
NAME
PDF::API2::Basic::TTF::XMLparse - provides support for XML parsing. Requires Expat module
XML::Parser::Expat
SYNOPSIS
use PDF::API2::Basic::TTF::Font;
use PDF::API2::Basic::TTF::XMLparse;
$f = PDF::API2::Basic::TTF::Font->new;
read_xml($f, $ARGV[0]);
$f->out($ARGV[1]);
DESCRIPTION
This module contains the support routines for parsing XML and generating the Truetype font
structures as a result. The module has been separated from the rest of the package in
order to reduce the dependency that this would bring, of the whole package on XML::Parser.
This way, people without the XML::Parser can still use the rest of the package.
The package interacts with another package through the use of a context containing and
element 'receiver' which is an object which can possibly receive one of the following
messages:
XML_start
This message is called when an open tag occurs. It is called with the context, tag
name and the attributes. The return value has no meaning.
XML_end
This messages is called when a close tag occurs. It is called with the context, tag
name and attributes (held over from when the tag was opened). There are 3 possible
return values from such a message:
undef This is the default return value indicating that default processing should
occur in which either the current element on the tree, or the text of this
element should be stored in the parent object.
$context
This magic value marks that the element should be deleted from the parent.
Nothing is stored in the parent. (This rather than '' is used to allow 0
returns.)
anything
Anything else is taken as the element content to be stored in the parent.
In addition, the context hash passed to these messages contains the following keys:
xml This is the expat xml object. The context is also available as $context->{'xml'}{'
mycontext'}. But that is a long winded way of not saying much!
font
This is the base object that was passed in for XML parsing.
receiver
This holds the current receiver of parsing events. It may be set in associated
application to adjust which objects should receive messages when. It is also stored in
the parsing stack to ensure that where an object changes it during XML_start, that
that same object that received XML_start will receive the corresponding XML_end
stack
This is the parsing stack, used internally to hold the current receiver and attributes
for each element open, as a complete hierarchy back to the root element.
tree
This element contains the storage tree corresponding to the parent of each element in
the stack. The default action is to push undef onto this stack during XML_start and
then to resolve this, either in the associated application (by changing
$context->{'tree'}[-1]) or during XML_end of a child element, by which time we know
whether we are dealing with an array or a hash or what.
text
Character processing is to insert all the characters into the text element of the
context for available use later.
METHODS
POD ERRORS
Hey! The above document had some coding errors, which are explained below:
Around line 84:
=back doesn't take any parameters, but you said =back 4
Around line 86:
=back doesn't take any parameters, but you said =back 4
Around line 127:
=back doesn't take any parameters, but you said =back 4
perl v5.10.0 2005-11-16 PDF::API2::Basic::TTF::XMLparse(3pm)
Generated by $Id: phpMan.php,v 4.49 2006/02/26 13:18:18 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2012-05-24 23:39 @38.107.179.236 Crawled by CCBot/1.0 (+http://www.commoncrawl.org/bot.html)