<?php
/**
* Copyright (C) 2019-2022 Graham Breach
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* For more information, please contact <[email protected]>
*/
namespace Goat1000\SVGGraph;
/**
* Abstract class implements common methods
*/
abstract class ColourRange implements \ArrayAccess {
protected $count = 2;
/**
* Sets up the length of the range
*/
public function setup($count)
{
$this->count = $count;
}
/**
* always true, because it wraps around
*/
#[\ReturnTypeWillChange]
public function offsetExists($offset)
{
return true;
}
#[\ReturnTypeWillChange]
public function offsetSet($offset, $value)
{
throw new \Exception('Unexpected offsetSet');
}
#[\ReturnTypeWillChange]
public function offsetUnset($offset)
{
throw new \Exception('Unexpected offsetUnset');
}
/**
* Clamps a value to range $min-$max
*/
protected static function clamp($val, $min, $max)
{
return min($max, max($min, $val));
}
}
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