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<?php
/**
* StatusNet, 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 StatusNet
* @author Zach Copley <zach@status.net>
* @copyright 2009 StatusNet, Inc.
* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
* @link http://status.net/
*/
if (!defined('STATUSNET') && !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 {
// TRANS: Validation error for a web colour.
// TRANS: %s is the provided (invalid) text for colour.
$errmsg = _('%s is not a valid color! Use 3 or 6 hex characters.');
throw new WebColorException(sprintf($errmsg, $hexcolor));
}
$this->red = hexdec($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($this->blue);
return strtoupper($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
{
}
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