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Generic implementation of property-lists.

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Signed-off-by: Edward Z. Yang <edwardzyang@thewritingpot.com>
This commit is contained in:
Edward Z. Yang 2008-12-06 00:43:42 -05:00
parent 90110a4e3a
commit 3a6b63dff1
4 changed files with 188 additions and 0 deletions
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1
NEWS
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@ -11,6 +11,7 @@ NEWS ( CHANGELOG and HISTORY ) HTMLPurifier
3.3.0, unknown release date
! Implement CSS property 'overflow' when %CSS.AllowTricky is true.
! Implement generic property list classess
- Fix bug with testEncodingSupportsASCII() algorithm when iconv() implementation
does not do the "right thing" with characters not supported in the output
set.

72
library/HTMLPurifier/PropertyList.php Normal file
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@ -0,0 +1,72 @@
<?php
/**
* Generic property list implementation
*/
class HTMLPurifier_PropertyList
{
/**
* Internal data-structure for properties
*/
protected $data = array();
/**
* Parent plist
*/
protected $parent;
/**
* Recursively retrieves the value for a key
*/
public function get($name) {
if ($this->has($name)) return $this->data[$name];
if ($this->parent) return $this->parent->get($name);
throw new HTMLPurifier_Exception("Key '$name' not found");
}
/**
* Sets the value of a key, for this plist
*/
public function set($name, $value) {
$this->data[$name] = $value;
}
/**
* Returns true if a given key exists
*/
public function has($name) {
return array_key_exists($name, $this->data);
}
/**
* Resets a value to the value of it's parent, usually the default. If
* no value is specified, the entire plist is reset.
*/
public function reset($name = null) {
if ($name == null) $this->data = array();
else unset($this->data[$name]);
}
/**
* Returns an iterator for traversing this array, optionally filtering
* for a certain prefix.
*/
public function getIterator($filter = null) {
$a = new ArrayObject($this->data);
return new HTMLPurifier_PropertyListIterator($a->getIterator(), $filter);
}
/**
* Returns the parent plist.
*/
public function getParent() {
return $this->parent;
}
/**
* Sets the parent plist.
*/
public function setParent($plist) {
$this->parent = $plist;
}
}

30
library/HTMLPurifier/PropertyListIterator.php Normal file
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@ -0,0 +1,30 @@
<?php
/**
* Property list iterator. Do not instantiate this class directly.
*/
class HTMLPurifier_PropertyListIterator extends FilterIterator
{
protected $l;
protected $filter;
/**
* @param $data Array of data to iterate over
* @param $filter Optional prefix to only allow values of
*/
public function __construct(Iterator $iterator, $filter = null) {
parent::__construct($iterator);
$this->l = strlen($filter);
$this->filter = $filter;
}
public function accept() {
$key = $this->getInnerIterator()->key();
if( strncmp($key, $this->filter, $this->l) !== 0 ) {
return false;
}
return true;
}
}

85
tests/HTMLPurifier/PropertyListTest.php Normal file
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@ -0,0 +1,85 @@
<?php
class HTMLPurifier_PropertyListTest extends UnitTestCase
{
function testBasic() {
$plist = new HTMLPurifier_PropertyList();
$plist->set('key', 'value');
$this->assertIdentical($plist->get('key'), 'value');
}
function testNotFound() {
$this->expectException(new HTMLPurifier_Exception("Key 'key' not found"));
$plist = new HTMLPurifier_PropertyList();
$plist->get('key');
}
function testRecursion() {
$parent_plist = new HTMLPurifier_PropertyList();
$parent_plist->set('key', 'value');
$plist = new HTMLPurifier_PropertyList();
$plist->setParent($parent_plist);
$this->assertIdentical($plist->get('key'), 'value');
}
function testOverride() {
$parent_plist = new HTMLPurifier_PropertyList();
$parent_plist->set('key', 'value');
$plist = new HTMLPurifier_PropertyList();
$plist->setParent($parent_plist);
$plist->set('key', 'value2');
$this->assertIdentical($plist->get('key'), 'value2');
}
function testRecursionNotFound() {
$this->expectException(new HTMLPurifier_Exception("Key 'key' not found"));
$parent_plist = new HTMLPurifier_PropertyList();
$plist = new HTMLPurifier_PropertyList();
$plist->setParent($parent_plist);
$this->assertIdentical($plist->get('key'), 'value');
}
function testHas() {
$plist = new HTMLPurifier_PropertyList();
$this->assertIdentical($plist->has('key'), false);
$plist->set('key', 'value');
$this->assertIdentical($plist->has('key'), true);
}
function testReset() {
$plist = new HTMLPurifier_PropertyList();
$plist->set('key1', 'value');
$plist->set('key2', 'value');
$plist->set('key3', 'value');
$this->assertIdentical($plist->has('key1'), true);
$this->assertIdentical($plist->has('key2'), true);
$this->assertIdentical($plist->has('key3'), true);
$plist->reset('key2');
$this->assertIdentical($plist->has('key1'), true);
$this->assertIdentical($plist->has('key2'), false);
$this->assertIdentical($plist->has('key3'), true);
$plist->reset();
$this->assertIdentical($plist->has('key1'), false);
$this->assertIdentical($plist->has('key2'), false);
$this->assertIdentical($plist->has('key3'), false);
}
function testIterator() {
$plist = new HTMLPurifier_PropertyList();
$plist->set('nkey1', 'v');
$plist->set('nkey2', 'v');
$plist->set('rkey3', 'v');
$a = array();
foreach ($plist->getIterator() as $key => $value) {
$a[$key] = $value;
}
$this->assertIdentical($a, array('nkey1' => 'v', 'nkey2' => 'v', 'rkey3' => 'v'));
$a = array();
foreach ($plist->getIterator('nkey') as $key => $value) {
$a[$key] = $value;
}
$this->assertIdentical($a, array('nkey1' => 'v', 'nkey2' => 'v'));
}
}