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<?php |
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/** |
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* Copyright (C) 2019-2022 Graham Breach |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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*/ |
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/** |
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* For more information, please contact <graham@goat1000.com> |
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*/ |
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|
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namespace Goat1000\SVGGraph; |
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|
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/** |
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* Abstract class implements common methods |
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*/ |
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abstract class ColourRange implements \ArrayAccess { |
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|
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protected $count = 2; |
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|
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/** |
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* Sets up the length of the range |
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*/ |
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public function setup($count) |
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{ |
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$this->count = $count; |
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} |
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|
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/** |
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* always true, because it wraps around |
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*/ |
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#[\ReturnTypeWillChange] |
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public function offsetExists($offset) |
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{ |
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return true; |
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} |
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|
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#[\ReturnTypeWillChange] |
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public function offsetSet($offset, $value) |
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{ |
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throw new \Exception('Unexpected offsetSet'); |
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} |
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|
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#[\ReturnTypeWillChange] |
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public function offsetUnset($offset) |
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{ |
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throw new \Exception('Unexpected offsetUnset'); |
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} |
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|
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/** |
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* Clamps a value to range $min-$max |
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*/ |
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protected static function clamp($val, $min, $max) |
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{ |
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return min($max, max($min, $val)); |
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} |
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} |
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