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<?php |
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/** |
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##DOC-SIGNATURE## |
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This file is part of WideImage. |
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WideImage 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 2.1 of the License, or |
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(at your option) any later version. |
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WideImage 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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You should have received a copy of the GNU Lesser General Public License |
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along with WideImage; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* @package Internals |
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**/ |
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namespace WideImage; |
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use WideImage\Exception\InvalidCoordinateException; |
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/** |
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* A utility class for smart coordinates |
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* |
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* @package Internals |
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**/ |
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class Coordinate |
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{ |
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protected static $coord_align = array('left', 'center', 'right', 'top', 'middle', 'bottom'); |
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protected static $coord_numeric = array('[0-9]+', '[0-9]+\.[0-9]+', '[0-9]+%', '[0-9]+\.[0-9]+%'); |
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/** |
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* Parses a numeric or string representation of a corrdinate into a structure |
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* |
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* @param string $coord Smart coordinate |
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* @return array Parsed smart coordinate |
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*/ |
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public static function parse($c) |
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{ |
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$tokens = array(); |
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$operators = array('+', '-'); |
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$flush_operand = false; |
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$flush_operator = false; |
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$current_operand = ''; |
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$current_operator = ''; |
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$coordinate = strval($c); |
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$expr_len = strlen($coordinate); |
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for ($i = 0; $i < $expr_len; $i++) { |
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$char = $coordinate[$i]; |
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if (in_array($char, $operators)) { |
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$flush_operand = true; |
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$flush_operator = true; |
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$current_operator = $char; |
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} else { |
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$current_operand .= $char; |
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if ($i == $expr_len - 1) { |
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$flush_operand = true; |
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} |
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} |
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if ($flush_operand) { |
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if (trim($current_operand) != '') { |
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$tokens[] = array('type' => 'operand', 'value' => trim($current_operand)); |
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} |
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$current_operand = ''; |
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$flush_operand = false; |
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} |
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if ($flush_operator) { |
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$tokens[] = array('type' => 'operator', 'value' => $char); |
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$flush_operator = false; |
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} |
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} |
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return $tokens; |
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} |
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/** |
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* Evaluates the $coord relatively to $dim |
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* |
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* @param string $coord A numeric value or percent string |
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* @param int $dim Dimension |
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* @param int $sec_dim Secondary dimension (for align) |
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* @return int Calculated value |
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*/ |
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public static function evaluate($coord, $dim, $sec_dim = null) |
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{ |
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$comp_regex = implode('|', self::$coord_align) . '|' . implode('|', self::$coord_numeric); |
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if (preg_match("/^([+-])?({$comp_regex})$/", $coord, $matches)) { |
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$sign = intval($matches[1] . "1"); |
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$val = $matches[2]; |
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if (in_array($val, self::$coord_align)) { |
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if ($sec_dim === null) { |
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switch ($val) { |
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case 'left': |
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case 'top': |
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return 0; |
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break; |
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case 'center': |
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case 'middle': |
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return $sign * intval($dim / 2); |
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break; |
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case 'right': |
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case 'bottom': |
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return $sign * $dim; |
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break; |
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default: |
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return null; |
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} |
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} else { |
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switch ($val) { |
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case 'left': |
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case 'top': |
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return 0; |
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break; |
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case 'center': |
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case 'middle': |
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return $sign * intval($dim / 2 - $sec_dim / 2); |
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break; |
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case 'right': |
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case 'bottom': |
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return $sign * ($dim - $sec_dim); |
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break; |
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default: |
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return null; |
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} |
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} |
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} elseif (substr($val, -1) === '%') { |
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return intval(round($sign * $dim * floatval(str_replace('%', '', $val)) / 100)); |
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} else { |
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return $sign * intval(round($val)); |
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} |
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} |
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} |
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/** |
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* Calculates and fixes a smart coordinate into a numeric value |
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* |
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* @param mixed $value Smart coordinate, relative to $dim |
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* @param int $dim Coordinate to which $value is relative |
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* @param int $sec_dim Secondary dimension (for align) |
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* @return int Calculated value |
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*/ |
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public static function fix($value, $dim, $sec_dim = null) |
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{ |
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$coord_tokens = self::parse($value); |
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if (count($coord_tokens) == 0 || $coord_tokens[count($coord_tokens) - 1]['type'] != 'operand') { |
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throw new InvalidCoordinateException("Couldn't parse coordinate '$value' properly."); |
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} |
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$value = 0; |
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$operation = 1; |
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foreach ($coord_tokens as $token) { |
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if ($token['type'] == 'operand') { |
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$operand_value = self::evaluate($token['value'], $dim, $sec_dim); |
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if ($operation == 1) { |
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$value = $value + $operand_value; |
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} elseif ($operation == -1) { |
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$value = $value - $operand_value; |
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} else { |
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throw new InvalidCoordinateException("Invalid coordinate syntax."); |
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} |
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$operation = 0; |
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} elseif ($token['type'] == 'operator') { |
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if ($token['value'] == '-') { |
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if ($operation == 0) { |
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$operation = -1; |
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} else { |
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$operation = $operation * -1; |
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} |
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} elseif ($token['value'] == '+') { |
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if ($operation == 0) { |
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$operation = '1'; |
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} |
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} |
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} |
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} |
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return $value; |
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} |
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} |
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This check looks for PHPDoc comments describing methods or function parameters that do not exist on the corresponding method or function.
Consider the following example. The parameter
$italyis not defined by the methodfinale(...).The most likely cause is that the parameter was removed, but the annotation was not.