84 lines
3.8 KiB
HTML
84 lines
3.8 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
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"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<meta name="description" content="Defines class naming conventions in HTML Purifier." />
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<link rel="stylesheet" type="text/css" href="./style.css" />
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<title>Naming Conventions - HTML Purifier</title>
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</head><body>
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<h1>Naming Conventions</h1>
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<div id="filing">Filed under Development</div>
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<div id="index">Return to the <a href="index.html">index</a>.</div>
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<div id="home"><a href="http://htmlpurifier.org/">HTML Purifier</a> End-User Documentation</div>
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<p>The classes in this library follow a few naming conventions, which may
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help you find the correct functionality more quickly. Here they are:</p>
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<dl>
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<dt>All classes occupy the HTMLPurifier pseudo-namespace.</dt>
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<dd>This means that all classes are prefixed with HTMLPurifier_. As such, all
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names under HTMLPurifier_ are reserved. I recommend that you use the name
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HTMLPurifierX_YourName_ClassName, especially if you want to take advantage
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of HTMLPurifier_ConfigDef.</dd>
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<dt>All classes correspond to their path if library/ was in the include path</dt>
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<dd>HTMLPurifier_AttrDef is located at HTMLPurifier/AttrDef.php; replace
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underscores with slashes and append .php and you'll have the location of
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the class.</dd>
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<dt>Harness and Test are reserved class names for unit tests</dt>
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<dd>The suffix <code>Test</code> indicates that the class is a subclass of UnitTestCase
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(of the Simpletest library) and is testable. "Harness" indicates a subclass
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of UnitTestCase that is not meant to be run but to be extended into
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concrete test cases and contains custom test methods (i.e. assert*())</dd>
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<dt>Class names do not necessarily represent inheritance hierarchies</dt>
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<dd>While we try to reflect inheritance in naming to some extent, it is not
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guaranteed (for instance, none of the classes inherit from HTMLPurifier,
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the base class). However, all class files have the require_once
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declarations to whichever classes they are tightly coupled to.</dd>
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<dt>Strategy has a meaning different from the Gang of Four pattern</dt>
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<dd>In Design Patterns, the Gang of Four describes a Strategy object as
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encapsulating an algorithm so that they can be switched at run-time. While
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our strategies are indeed algorithms, they are not meant to be substituted:
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all must be present in order for proper functioning.</dd>
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<dt>Abbreviations are avoided</dt>
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<dd>We try to avoid abbreviations as much as possible, but in some cases,
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abbreviated version is more readable than the full version. Here, we
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list common abbreviations:
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<ul>
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<li>Attr to Attributes (note that it is plural, i.e. <code>$attr = array()</code>)</li>
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<li>Def to Definition</li>
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<li><code>$ret</code> is the value to be returned in a function</li>
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</ul>
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</dd>
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<dt>Ambiguity concerning the definition of Def/Definition</dt>
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<dd>While a definition normally defines the structure/acceptable values of
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an entity, most of the definitions in this application also attempt
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to validate and fix the value. I am unsure of a better name, as
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"Validator" would exclude fixing the value, "Fixer" doesn't invoke
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the proper image of "fixing" something, and "ValidatorFixer" is too long!
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Some other suggestions were "Handler", "Reference", "Check", "Fix",
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"Repair" and "Heal".</dd>
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<dt>Transform not Transformer</dt>
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<dd>Transform is both a noun and a verb, and thus we define a "Transform" as
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something that "transforms," leaving "Transformer" (which sounds like an
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electrical device/robot toy).</dd>
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</dl>
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</body></html>
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<!-- vim: et sw=4 sts=4
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-->
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