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<?php
/**
* HTML_Common2: port of HTML_Common package to PHP5
*
* PHP version 5
*
* LICENSE:
*
* Copyright (c) 2004-2019, Alexey Borzov <avb@php.net>
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The names of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @category HTML
* @package HTML_Common2
* @author Alexey Borzov <avb@php.net>
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @link http://pear.php.net/package/HTML_Common2
*/
/**
* Base class for HTML classes
*
* Implements methods for working with HTML attributes, parsing and generating
* attribute strings. Port of HTML_Common class for PHP4 originally written by
* Adam Daniel with contributions from numerous other developers.
*
* @category HTML
* @package HTML_Common2
* @author Alexey Borzov <avb@php.net>
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @version Release: 2.1.2
* @link http://pear.php.net/package/HTML_Common2
*/
abstract class HTML_Common2 implements ArrayAccess
{
/**
* Associative array of attributes
* @var array
*/
protected $attributes = array();
/**
* Changes to attributes in this list will be announced via onAttributeChange()
* method rather than performed by HTML_Common2 class itself
* @var array
* @see onAttributeChange()
*/
protected $watchedAttributes = array();
/**
* Indentation level of the element
* @var int
*/
private $_indentLevel = 0;
/**
* Comment associated with the element
* @var string
*/
private $_comment = null;
/**
* Global options for all elements generated by subclasses of HTML_Common2
*
* Preset options are
* - 'charset': charset parameter used in htmlspecialchars() calls,
* defaults to 'ISO-8859-1'
* - 'indent': string used to indent HTML elements, defaults to "\11"
* - 'linebreak': string used to indicate linebreak, defaults to "\12"
*
* @var array
*/
private static $_options = array(
'charset' => 'ISO-8859-1',
'indent' => "\11",
'linebreak' => "\12"
);
/**
* Sets global option(s)
*
* @param string|array $nameOrOptions Option name or array ('option name' => 'option value')
* @param mixed $value Option value, if first argument is not an array
*/
public static function setOption($nameOrOptions, $value = null)
{
if (is_array($nameOrOptions)) {
foreach ($nameOrOptions as $k => $v) {
self::setOption($k, $v);
}
} else {
$linebreaks = array('win' => "\15\12", 'unix' => "\12", 'mac' => "\15");
if ('linebreak' == $nameOrOptions && isset($linebreaks[$value])) {
$value = $linebreaks[$value];
}
self::$_options[$nameOrOptions] = $value;
}
}
/**
* Returns global option(s)
*
* @param string $name Option name
*
* @return mixed Option value, null if option does not exist,
* array of all options if $name is not given
*/
public static function getOption($name = null)
{
if (null === $name) {
return self::$_options;
} else {
return isset(self::$_options[$name])? self::$_options[$name]: null;
}
}
/**
* Parses the HTML attributes given as string
*
* @param string $attrString HTML attribute string
*
* @return array An associative array of attributes
*/
protected static function parseAttributes($attrString)
{
$attributes = array();
if (preg_match_all(
"/(([A-Za-z_:]|[^\\x00-\\x7F])([A-Za-z0-9_:.-]|[^\\x00-\\x7F])*)" .
"([ \\n\\t\\r]+)?(=([ \\n\\t\\r]+)?(\"[^\"]*\"|'[^']*'|[^ \\n\\t\\r]*))?/",
$attrString,
$regs
)) {
for ($i = 0; $i < count($regs[1]); $i++) {
$name = trim($regs[1][$i]);
$check = trim($regs[0][$i]);
$value = trim($regs[7][$i]);
if ($name == $check) {
$attributes[strtolower($name)] = strtolower($name);
} else {
if (!empty($value) && ($value[0] == '\'' || $value[0] == '"')) {
$value = substr($value, 1, -1);
}
$attributes[strtolower($name)] = $value;
}
}
}
return $attributes;
}
/**
* Creates a valid attribute array from either a string or an array
*
* @param string|array $attributes Array of attributes or HTML attribute string
*
* @return array An associative array of attributes
*/
protected static function prepareAttributes($attributes)
{
$prepared = array();
if (is_string($attributes)) {
return self::parseAttributes($attributes);
} elseif (is_array($attributes)) {
foreach ($attributes as $key => $value) {
if (is_int($key)) {
$key = strtolower($value);
$prepared[$key] = $key;
} else {
$prepared[strtolower($key)] = (string)$value;
}
}
}
return $prepared;
}
/**
* Removes an attribute from an attribute array
*
* @param array &$attributes Attribute array
* @param string $name Name of attribute to remove
*/
protected static function removeAttributeArray(array &$attributes, $name)
{
unset($attributes[strtolower($name)]);
}
/**
* Creates HTML attribute string from array
*
* @param array $attributes Attribute array
*
* @return string Attribute string
*/
protected static function getAttributesString(array $attributes)
{
$str = '';
$charset = self::getOption('charset');
foreach ($attributes as $key => $value) {
$str .= ' ' . $key . '="' . htmlspecialchars($value, ENT_QUOTES, $charset) . '"';
}
return $str;
}
/**
* Class constructor, sets default attributes
*
* @param array|string $attributes Array of attribute 'name' => 'value' pairs
* or HTML attribute string
*/
public function __construct($attributes = null)
{
$this->mergeAttributes($attributes);
}
/**
* Sets the value of the attribute
*
* @param string $name Attribute name
* @param string $value Attribute value (will be set to $name if omitted)
*
* @return $this
*/
public function setAttribute($name, $value = null)
{
$name = strtolower($name);
if (is_null($value)) {
$value = $name;
}
if (in_array($name, $this->watchedAttributes)) {
$this->onAttributeChange($name, $value);
} else {
$this->attributes[$name] = (string)$value;
}
return $this;
}
/**
* Returns the value of an attribute
*
* @param string $name Attribute name
*
* @return string|null Attribute value, null if attribute does not exist
*/
public function getAttribute($name)
{
$name = strtolower($name);
return isset($this->attributes[$name])? $this->attributes[$name]: null;
}
/**
* Sets the attributes
*
* @param string|array $attributes Array of attribute 'name' => 'value' pairs
* or HTML attribute string
*
* @return $this
*/
public function setAttributes($attributes)
{
$attributes = self::prepareAttributes($attributes);
$watched = array();
foreach ($this->watchedAttributes as $watchedKey) {
if (isset($attributes[$watchedKey])) {
$this->setAttribute($watchedKey, $attributes[$watchedKey]);
unset($attributes[$watchedKey]);
} else {
$this->removeAttribute($watchedKey);
}
if (isset($this->attributes[$watchedKey])) {
$watched[$watchedKey] = $this->attributes[$watchedKey];
}
}
$this->attributes = array_merge($watched, $attributes);
return $this;
}
/**
* Returns the attribute array or string
*
* @param bool $asString Whether to return attributes as string
*
* @return array|string
*/
public function getAttributes($asString = false)
{
if ($asString) {
return self::getAttributesString($this->attributes);
} else {
return $this->attributes;
}
}
/**
* Merges the existing attributes with the new ones
*
* @param array|string $attributes Array of attribute 'name' => 'value' pairs
* or HTML attribute string
*
* @return $this
*/
public function mergeAttributes($attributes)
{
$attributes = self::prepareAttributes($attributes);
foreach ($this->watchedAttributes as $watchedKey) {
if (isset($attributes[$watchedKey])) {
$this->onAttributeChange($watchedKey, $attributes[$watchedKey]);
unset($attributes[$watchedKey]);
}
}
$this->attributes = array_merge($this->attributes, $attributes);
return $this;
}
/**
* Removes an attribute
*
* @param string $attribute Name of attribute to remove
*
* @return $this
*/
public function removeAttribute($attribute)
{
if (in_array(strtolower($attribute), $this->watchedAttributes)) {
$this->onAttributeChange(strtolower($attribute), null);
} else {
self::removeAttributeArray($this->attributes, $attribute);
}
return $this;
}
/**
* Sets the indentation level
*
* @param int $level Indentation level
*
* @return $this
*/
public function setIndentLevel($level)
{
$level = intval($level);
if (0 <= $level) {
$this->_indentLevel = $level;
}
return $this;
}
/**
* Gets the indentation level
*
* @return int
*/
public function getIndentLevel()
{
return $this->_indentLevel;
}
/**
* Returns the string to indent the element
*
* @return string
*/
protected function getIndent()
{
return str_repeat(self::getOption('indent'), $this->getIndentLevel());
}
/**
* Sets the comment for the element
*
* @param string $comment String to output as HTML comment
*
* @return $this
*/
public function setComment($comment)
{
$this->_comment = $comment;
return $this;
}
/**
* Returns the comment associated with the element
*
* @return string
*/
public function getComment()
{
return $this->_comment;
}
/**
* Checks whether the element has given CSS class
*
* @param string $class CSS Class name
*
* @return bool
*/
public function hasClass($class)
{
$regex = '/(^|\s)' . preg_quote($class, '/') . '(\s|$)/';
return (bool)preg_match($regex, $this->getAttribute('class'));
}
/**
* Adds the given CSS class(es) to the element
*
* @param string|array $class Class name, multiple class names separated by
* whitespace, array of class names
*
* @return $this
*/
public function addClass($class)
{
if (!is_array($class)) {
$class = preg_split('/\s+/', $class, null, PREG_SPLIT_NO_EMPTY);
}
$curClass = preg_split(
'/\s+/', $this->getAttribute('class'), null, PREG_SPLIT_NO_EMPTY
);
foreach ($class as $c) {
if (!in_array($c, $curClass)) {
$curClass[] = $c;
}
}
$this->setAttribute('class', implode(' ', $curClass));
return $this;
}
/**
* Removes the given CSS class(es) from the element
*
* @param string|array $class Class name, multiple class names separated by
* whitespace, array of class names
*
* @return $this
*/
public function removeClass($class)
{
if (!is_array($class)) {
$class = preg_split('/\s+/', $class, null, PREG_SPLIT_NO_EMPTY);
}
$curClass = array_diff(
preg_split(
'/\s+/', $this->getAttribute('class'), null, PREG_SPLIT_NO_EMPTY
),
$class
);
if (0 == count($curClass)) {
$this->removeAttribute('class');
} else {
$this->setAttribute('class', implode(' ', $curClass));
}
return $this;
}
/**
* Returns the HTML representation of the element
*
* This magic method allows using the instances of HTML_Common2 in string
* contexts
*
* @return string
*/
abstract public function __toString();
/**
* Called if trying to change an attribute with name in $watchedAttributes
*
* This method is called for each attribute whose name is in the
* $watchedAttributes array and which is being changed by setAttribute(),
* setAttributes() or mergeAttributes() or removed via removeAttribute().
* Note that the operation for the attribute is not carried on after calling
* this method, it is the responsibility of this method to change or remove
* (or not) the attribute.
*
* @param string $name Attribute name
* @param string $value Attribute value, null if attribute is being removed
*/
protected function onAttributeChange($name, $value = null)
{
}
/**
* Whether or not an offset (HTML attribute) exists
*
* @param string $offset An offset to check for.
*
* @return boolean Returns true on success or false on failure.
* @link http://php.net/manual/en/arrayaccess.offsetexists.php
*/
public function offsetExists($offset)
{
return isset($this->attributes[strtolower($offset)]);
}
/**
* Returns the value at specified offset (i.e. attribute name)
*
* @param string $offset The offset to retrieve.
*
* @return string|null
* @link http://php.net/manual/en/arrayaccess.offsetget.php
* @see getAttribute()
*/
public function offsetGet($offset)
{
return $this->getAttribute($offset);
}
/**
* Assigns a value to the specified offset (i.e. attribute name)
*
* @param string $offset The offset to assign the value to
* @param string $value The value to set
*
* @return void
* @link http://php.net/manual/en/arrayaccess.offsetset.php
* @see setAttribute()
*/
public function offsetSet($offset, $value)
{
if (null !== $offset) {
$this->setAttribute($offset, $value);
} else {
// handles $foo[] = 'disabled';
$this->setAttribute($value);
}
}
/**
* Unsets an offset (i.e. removes an attribute)
*
* @param string $offset The offset to unset
*
* @return void
* @link http://php.net/manual/en/arrayaccess.offsetunset.php
* @see removeAttribute()
*/
public function offsetUnset($offset)
{
$this->removeAttribute($offset);
}
}
?>
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