/library/Zend/View/Helper/TinySrc.php
PHP | 317 lines | 139 code | 29 blank | 149 comment | 19 complexity | 2e35adb23f428b06bcb9ef56b4b6e786 MD5 | raw file
- <?php
- /**
- * Zend Framework
- *
- * LICENSE
- *
- * This source file is subject to the new BSD license that is bundled
- * with this package in the file LICENSE.txt.
- * It is also available through the world-wide-web at this URL:
- * http://framework.zend.com/license/new-bsd
- * If you did not receive a copy of the license and are unable to
- * obtain it through the world-wide-web, please send an email
- * to license@zend.com so we can send you a copy immediately.
- *
- * @category Zend
- * @package Zend_View
- * @subpackage Helper
- * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- */
-
- /** Zend_View_Helper_HtmlElement */
- require_once 'Zend/View/Helper/HtmlElement.php';
-
- /**
- * Helper for generating urls and/or image tags for use with tinysrc.net
- *
- * tinysrc.net provides an API for generating scaled, browser device-specific
- * images. In essence, you pass the API the URL to an image on your own server,
- * and tinysrc.net then provides the appropriate image based on the device that
- * accesses it.
- *
- * Additionally, tinysrc.net allows you to specify additional configuration via
- * the API:
- *
- * - image size. You may define this as:
- * - explicit size
- * - subtractive size (size of screen minus specified number of pixels)
- * - percentage size (percentage of screen size))
- * - image format. This will convert the image to the given format; allowed
- * values are "png" or "jpeg". By default, gif images are converted to png.
- *
- * This helper allows you to specify all configuration options, as well as:
- *
- * - whether or not to generate the full image tag (or just the URL)
- * - base url to images (which should include the protocol, server, and
- * optionally port and base path)
- *
- * @see http://tinysrc.net/
- * @package Zend_View
- * @subpackage Helper
- * @copyright Copyright (c) 2005-2011 Zend Technologies USA Inc. (http://www.zend.com)
- * @license http://framework.zend.com/license/new-bsd New BSD License
- */
- class Zend_View_Helper_TinySrc extends Zend_View_Helper_HtmlElement
- {
- const TINYSRC_BASE = 'http://i.tinysrc.mobi';
-
- /**
- * @var string Base URL for images
- */
- protected $_baseUrl;
-
- /**
- * @var bool Whether or not to create an image tag
- */
- protected $_createTagFlag = true;
-
- /**
- * @var string Default width and height
- */
- protected $_dimensions = '';
-
- /**
- * Default options
- *
- * Used when determining what options were passed, and needing to merge
- * them with default options.
- *
- * @var array
- */
- protected $_defaultOptions = array(
- 'base_url' => null,
- 'format' => null,
- 'width' => false,
- 'height' => false,
- 'create_tag' => true,
- );
-
- /**
- * @var string Default image format to use
- */
- protected $_format = '';
-
- /**
- * Generate a link or image tag pointing to tinysrc.net
- *
- * @param mixed $image
- * @param array $options
- * @return void
- */
- public function tinySrc($image = null, array $options = array())
- {
- if (null === $image) {
- return $this;
- }
-
- $defaultOptions = $this->_defaultOptions;
- $defaultOptions['create_tag'] = $this->createTag();
- $options = array_merge($defaultOptions, $options);
-
- $url = '/' . $this->_mergeBaseUrl($options) . ltrim($image, '/');
-
- $src = self::TINYSRC_BASE
- . $this->_mergeFormat($options)
- . $this->_mergeDimensions($options)
- . $url;
-
- if (!$options['create_tag']) {
- return $src;
- }
-
- foreach (array_keys($this->_defaultOptions) as $key) {
- switch ($key) {
- case 'width':
- case 'height':
- if (!is_int($options[$key]) || !is_numeric($options[$key]) || $options[$key] < 0) {
- unset($options[$key]);
- }
- break;
- default:
- unset($options[$key]);
- break;
- }
- }
-
- $options['src'] = $src;
-
- $tag = '<img' . $this->_htmlAttribs($options) . $this->getClosingBracket();
- return $tag;
- }
-
- /**
- * Set base URL for images
- *
- * @param string $url
- * @return Zend_View_Helper_TinySrc
- */
- public function setBaseUrl($url)
- {
- $this->_baseUrl = rtrim($url, '/') . '/';
- return $this;
- }
-
- /**
- * Get base URL for images
- *
- * If none already set, uses the ServerUrl and BaseUrl view helpers to
- * determine the base URL to images.
- *
- * @return string
- */
- public function getBaseUrl()
- {
- if (null === $this->_baseUrl) {
- $this->setBaseUrl($this->view->serverUrl($this->view->baseUrl()));
- }
- return $this->_baseUrl;
- }
-
- /**
- * Set default image format
- *
- * If set, this will set the default format to use on all images.
- *
- * @param null|string $format
- * @return Zend_View_Helper_TinySrc
- * @throws Zend_View_Exception
- */
- public function setDefaultFormat($format = null)
- {
- if (null === $format) {
- $this->_format = '';
- return $this;
- }
-
- $format = strtolower($format);
- if (!in_array($format, array('png', 'jpeg'))) {
- require_once 'Zend/View/Exception.php';
- throw new Zend_View_Exception('Invalid format; must be one of "jpeg" or "png"');
- }
- $this->_format = "/$format";
- return $this;
- }
-
- /**
- * Set default dimensions
- *
- * If null is specified for width, default dimensions will be cleared. If
- * only width is specified, only width will be used. If either dimension
- * fails validation, an exception is raised.
- *
- * @param null|int|string $width
- * @param null|int|string $height
- * @return Zend_View_Helper_TinySrc
- * @throws Zend_View_Exception
- */
- public function setDefaultDimensions($width = null, $height = null)
- {
- if (null === $width) {
- $this->_dimensions = '';
- return $this;
- }
-
- if (!$this->_validateDimension($width)) {
- require_once 'Zend/View/Exception.php';
- throw new Zend_View_Exception('Invalid dimension; must be an integer, optionally preceded by "-" or "x"');
- }
-
- $this->_dimensions = "/$width";
- if (null === $height) {
- return $this;
- }
-
- if (!$this->_validateDimension($height)) {
- require_once 'Zend/View/Exception.php';
- throw new Zend_View_Exception('Invalid dimension; must be an integer, optionally preceded by "-" or "x"');
- }
- $this->_dimensions .= "/$height";
- return $this;
- }
-
- /**
- * Set state of "create tag" flag
- *
- * @param bool $flag
- * @return Zend_View_Helper_TinySrc
- */
- public function setCreateTag($flag)
- {
- $this->_createTagFlag = (bool) $flag;
- return $this;
- }
-
- /**
- * Should the helper create an image tag?
- *
- * @return bool
- */
- public function createTag()
- {
- return $this->_createTagFlag;
- }
-
- /**
- * Validate a dimension
- *
- * Dimensions may be integers, optionally preceded by '-' or 'x'.
- *
- * @param string $dim
- * @return bool
- */
- protected function _validateDimension($dim)
- {
- if (!is_scalar($dim) || is_bool($dim)) {
- return false;
- }
- return preg_match('/^(-|x)?\d+$/', (string) $dim);
- }
-
- /**
- * Determine whether to use default base URL, or base URL from options
- *
- * @param array $options
- * @return string
- */
- protected function _mergeBaseUrl(array $options)
- {
- if (null === $options['base_url']) {
- return $this->getBaseUrl();
- }
- return rtrim($options['base_url'], '/') . '/';
- }
-
- /**
- * Determine whether to use default format or format provided in options.
- *
- * @param array $options
- * @return string
- */
- protected function _mergeFormat(array $options)
- {
- if (in_array($options['format'], array('png', 'jpeg'))) {
- return '/' . $options['format'];
- }
- return $this->_format;
- }
-
- /**
- * Determine whether to use default dimensions, or those passed in options.
- *
- * @param array $options
- * @return string
- */
- protected function _mergeDimensions(array $options)
- {
- if (!$this->_validateDimension($options['width'])) {
- return $this->_dimensions;
- }
- $dimensions = '/' . $options['width'];
- if (!$this->_validateDimension($options['height'])) {
- return $dimensions;
- }
- $dimensions .= '/' . $options['height'];
- return $dimensions;
- }
- }