diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/webcolor.php | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/lib/webcolor.php b/lib/webcolor.php new file mode 100644 index 000000000..65713d26e --- /dev/null +++ b/lib/webcolor.php @@ -0,0 +1,191 @@ +<?php +/** + * Laconica, the distributed open-source microblogging tool + * + * Base class for deleting things + * + * PHP version 5 + * + * LICENCE: This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero 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 Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * @category Personal + * @package Laconica + * @author Zach Copley <zach@controlyourself.ca> + * @copyright 2009 Control Yourself, Inc. + * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0 + * @link http://laconi.ca/ + */ + +if (!defined('LACONICA')) { + exit(1); +} + +class WebColor { + + // XXX: Maybe make getters and setters for r,g,b values and tuples, + // e.g.: to support this kinda CSS representation: rgb(255,0,0) + // http://www.w3.org/TR/CSS21/syndata.html#color-units + + var $red = 0; + var $green = 0; + var $blue = 0; + + /** + * Constructor + * + * @return nothing + */ + + function __construct($color = null) + { + if (isset($color)) { + $this->parseColor($color); + } + } + + /** + * Parses input to and tries to determine whether the color + * is being specified via an integer or hex tuple and sets + * the RGB instance variables accordingly. + * + * XXX: Maybe support (r,g,b) style, and array? + * + * @param mixed $color + * + * @return nothing + */ + + function parseColor($color) { + + if (is_numeric($color)) { + $this->setIntColor($color); + } else { + + // XXX named colors + + // XXX: probably should do even more validation + + if (preg_match('/(#([0-9A-Fa-f]{3,6})\b)/u', $color) > 0) { + $this->setHexColor($color); + } else { + $errmsg = _('%s is not a valid color!'); + throw new WebColorException(sprintf($errmsg, $color)); + } + } + } + + /** + * @param string $name + * + * @return nothing + */ + + function setNamedColor($name) + { + // XXX Implement this + } + + + /** + * Sets the RGB color values from a a hex tuple + * + * @param string $hexcolor + * + * @return nothing + */ + + function setHexColor($hexcolor) { + + if ($hexcolor[0] == '#') { + $hexcolor = substr($hexcolor, 1); + } + + if (strlen($hexcolor) == 6) { + list($r, $g, $b) = array($hexcolor[0].$hexcolor[1], + $hexcolor[2].$hexcolor[3], + $hexcolor[4].$hexcolor[5]); + } elseif (strlen($hexcolor) == 3) { + list($r, $g, $b) = array($hexcolor[0].$hexcolor[0], + $hexcolor[1].$hexcolor[1], + $hexcolor[2].$hexcolor[2]); + } else { + return false; + } + + $this->red = hexdec($r); + $this->green = hexdec($g); + $this->blue = hexdec($b); + + } + + /** + * Sets the RGB color values from a 24-bit integer + * + * @param int $intcolor + * + * @return nothing + */ + + function setIntColor($intcolor) + { + // We could do 32 bit and have an alpha channel because + // Sarven wants one real bad, but nah. + + $this->red = $intcolor >> 16; + $this->green = $intcolor >> 8 & 0xFF; + $this->blue = $intcolor & 0xFF; + + } + + /** + * Returns a hex tuple of the RGB color useful for output in HTML + * + * @return string + */ + + function hexValue() { + + $hexcolor = (strlen(dechex($this->red)) < 2 ? '0' : '' ) . + dechex($this->red); + $hexcolor .= (strlen(dechex($this->green)) < 2 ? '0' : '') . + dechex($this->green); + $hexcolor .= (strlen(dechex($this->blue)) < 2 ? '0' : '') . + dechex($this->blue); + + return $hexcolor; + + } + + /** + * Returns a 24-bit packed integer representation of the RGB color + * for convenient storage in the DB + * + * XXX: probably could just use hexdec() instead + * + * @return int + */ + + function intValue() + { + $intcolor = 256 * 256 * $this->red + 256 * $this->green + $this->blue; + return $intcolor; + } + +} + +class WebColorException extends Exception +{ +} + +?>
\ No newline at end of file |