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<?php
# Copyright (c) 2008 - Marcus Lunzenauer <mlunzena@uos.de>
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
/**
* TextHelper.
*
*
* @package flexi
* @subpackage helper
*
* @author Marcus Lunzenauer (mlunzena@uos.de)
* @copyright (c) Authors
* @version $Id$
*/
class TextHelper {
/**
* Holds the internal cycles.
*
* @ignore
*/
private static $cycles = array();
/**
* Returns a camelized string from a lower case and underscored string by
* replacing slash with underscore and upper-casing each letter preceded
* by an underscore.
*
* @param string String to camelize.
*
* @return string Camelized string.
*/
function camelize($word) {
return str_replace(' ', '',
ucwords(str_replace(array('_', '/'),
array(' ', ' '), $word)));
}
/**
* Creates a Cycle object whose +__toString method cycles through elements of
* an array every time it is called. This can be used for example, to
* alternate classes for table rows:
*
* <? foreach ($items as $item) : ?>
* <tr class="<?= TextHelper::cycle('odd', 'even') ?>">
* <td><?= item ?></td>
* </tr>
* <? endforeach ?>
*
* You can use named cycles to allow nesting in loops. Passing a single array
* as the only parameter with a <tt>name</tt> key will create a named cycle.
* You can manually reset a cycle by calling reset_cycle and passing the
* name of the cycle.
*
* <? foreach($items as $item) : ?>
* <tr class="<?= TextHelper::cycle(array("even", "odd", "name" => "row_class")) ?>">
* <td>
* <? foreach ($item->values as $value) : ?>
* <span style="color:<?= TextHelper::cycle(array("red", "green", "blue", "name" => "colors")) : ?>">
* <?= $value ?>
* </span>
* <? endforeach ?>
* <? TextHelper::reset_cycle("colors") ?>
* </td>
* </tr>
* <? endforeach ?>
*/
static function cycle($first_value) {
$values = func_get_args();
if (sizeof($values) == 1 && is_array($values[0])) {
$values = $values[0];
$name = isset($values['name']) ? $values['name'] : 'default';
unset($values['name']);
}
else {
$name = 'default';
}
$cycle = self::get_cycle($name);
if (is_null($cycle) || $cycle->values !== $values) {
$cycle = self::set_cycle($name, new TextHelperCycle($values));
}
return (string) $cycle;
}
/**
* Resets a cycle so that it starts from the first element the next time
* it is called. Pass in +name+ to reset a named cycle.
*
* @param string an optional name of a cycle
*
* @return void
*/
public static function reset_cycle($name = 'default') {
$cycle = self::get_cycle($name);
if (isset($cycle)) {
$cycle->reset();
}
}
/**
* @ignore
*/
private static function get_cycle($name) {
return isset(self::$cycles[$name]) ? self::$cycles[$name] : NULL;
}
/**
* @ignore
*/
private static function set_cycle($name, $cycle) {
return self::$cycles[$name] = $cycle;
}
}
/**
* This class holds an array of string and cycles through them.
*
* @package flexi
* @subpackage helper
*
* @author Marcus Lunzenauer (mlunzena@uos.de)
* @copyright (c) Authors
* @version $Id$
*/
class TextHelperCycle {
public $values;
function __construct($values) {
$this->values = (array) $values;
}
function cycle() {
$result = current($this->values);
if (next($this->values) === FALSE)
$this->reset();
return $result;
}
function reset() {
reset($this->values);
}
function __toString() {
return $this->cycle();
}
}
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