Improved Image View Helper
1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 2021 22 23 24 2526 27 28 29 3031 32 33 34 3536 37 38 39 4041 42 43 44 4546 47 48 49 5051 52 53 54 5556 57 58 59 6061 62 63 64 6566 67 68 69 7071 72 73 74 7576 77 78 79 8081 82 83 84 8586 87 88 89 9091 92 93 94 9596 97 98 99 100101 102 103 104 105106 107 108 109 110111 112 113 114 115116 117 118 119 120121 122 123 124 125126 127 128 129 130131 132 133 134 135136 137 138 139 140141 142 143 144 145146 147 148 149 150151 152 153 154 155156 157 158 159 160161 162 163 164 165166 167 168 169 170171 172 173 174 175176 177 178 | <?php /** * This is based on the code of S. Mohammed Alsharaf, http://www.zfsnippets.com/snippets/view/id/44. * * I still don't like this code, far too many properties, most of which are being directly accessed, * a hardwired path for thumbnails, and a number of other annoyances. * * For this version of the Image view helper, I reworked it to support an array of configs that you pick from * via parameter. You could easily pull the contents of the array from application.ini if you want. * * It also eliminates the need for paths in the configuration, and should work correctly with your Zend app * being run in sub directories. * * I tried to clean up the code so the various paths to things are all set in the one location, which should * make altering it for future development easier. * * Basic usage is as follows: * * <?= $this->image('id_name', '/path/to/image.jpg', array('alt' => 'image alt'), 'preset_name'); ?> * * * @license http://www.gnu.org/licenses/gpl-2.0.html GNU Public License * @author Cameron Germein (cameron@dhmedia.com.au) * @version 1.1 */ class My_View_Helper_Image extends Zend_View_Helper_Abstract { protected $_name; protected $_thumb_config; protected $_filesystem_path; protected $_img_src; protected $_thumb_src; protected $_full_image_path; protected $_file_name; protected $_thumb_file_name; protected $_image_dir_path; protected $_thumb_dir_path; protected $_thumbnail; //instance of Image; protected $_valid_mime = array ('image/png', 'image/jpeg', 'image/jpg', 'image/gif' ); public function image($name, $image_path = null, $attribs = array(), $config = 'none') { //get details about the thumbnail to generate. $this->_thumb_config = $this->_getConfig($config); //set path $this->_setPaths($image_path); //check that the image exists. if (!is_file($this->_filesystem_path . '/' . $this->_full_image_path)) { return false; } //check the image is valid $this->_checkImage(); //set name $this->_name = $this->view->escape ( $name ); //set attributes $this->_setAttributes ( $attribs ); //generate thumbnail $this->_generateThumbnail(); return $this->_render (); } protected function _setPaths($path) { $this->_filesystem_path = $_SERVER['DOCUMENT_ROOT'] . $this->view->baseUrl(); $this->_full_image_path = $path; $parts = pathinfo($path); $this->_file_name = $parts['basename']; $this->_image_dir_path = $parts['dirname']; $this->_thumb_dir_path = $parts['dirname'] . '/thumbs'; $this->_thumb_file_name = $this->_thumb_config['width'] . 'x' . $this->_thumb_config['height'] . '_' . $this->_file_name; $this->_img_src = $this->view->baseUrl () . $this->_image_dir_path . '/' . $this->_file_name; $this->_thumb_src = $this->view->baseUrl () . $this->_thumb_dir_path . '/' . $this->_thumb_file_name; } protected function _checkImage() { if (!$img_info = getimagesize($this->_filesystem_path . '/' . $this->_full_image_path)) { //throw new Exception('Image is invalid!'); return false; } if (!in_array ($img_info['mime'], $this->_valid_mime)) { throw new Exception('Image has invalid mime type!'); } } protected function _setAttributes($attribs) { $alt = ''; $class = ''; $map = ''; $class = ''; if (isset ( $attribs ['alt'] )) { $alt = 'alt="' . $this->view->escape ( $attribs ['alt'] ) . '" '; } if (isset ( $attribs ['title'] )) { $title = 'title="' . $this->view->escape ( $attribs ['title'] ) . '" '; } else { $title = 'title="' . $this->view->escape ( $attribs ['alt'] ) . '" '; } if (isset ( $attribs ['map'] )) { $map = 'usemap="#' . $this->view->escape ( $attribs ['map'] ) . '" '; } if (isset ( $attribs ['class'] )) { $class = 'class="' . $this->view->escape ( $attribs ['class'] ) . '" '; } $this->_attribs = $alt . $title . $map . $class; } protected function _generateThumbnail() { $full_thumb_path = $this->_filesystem_path . '/' . $this->_thumb_dir_path . '/' . $this->_thumb_file_name; //make sure the thumbnail directory exists. if (!file_exists($this->_filesystem_path . '/' . $this->_thumb_dir_path)) { if (!mkdir($this->_filesystem_path . '/' . $this->_thumb_dir_path)) { throw new Exception ('Cannot create thumbnail directory!'); }; } //if the thumbnail already exists, don't recreate it. if (file_exists ( $full_thumb_path )) { $image = new Image(); $image->open($full_thumb_path); $this->_thumbnail = $image; return true; } // resize image $image = new Image(); $image->open($this->_filesystem_path . $this->_full_image_path) ->resize($this->_thumb_config['width'], $this->_thumb_config['height'] ) ->save($full_thumb_path, $this->_thumb_config['quality'] ); $this->_thumbnail = $image; return true; } protected function _render() { $xhtml = '<a href="' . $this->_img_src . '"> <img width="' . $this->_thumbnail->getWidth() . '" height="' . $this->_thumbnail->getHeight() . '" src="' . $this->_thumb_src . '" ' . $this->_attribs . ' id="' . $this->_name . '"'; $endTag = ' />'; if (($this->view instanceof Zend_View_Abstract) && ! $this->view->doctype ()->isXhtml ()) { $endTag = '>'; } $xhtml .= $endTag . "</a>"; return $xhtml; } protected function _getConfig($config) { $configs = array ( '300x300' => array ( 'width' => 300, 'height' => 300, 'quality' => 100 ), 'widescreen' => array ( 'width' => 400, 'height' => 200, 'quality' => 100 ), ); if (!array_key_exists($config, $configs)) { throw new Exception('Config does not exist!'); } return $configs[$config]; } } |
1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 2021 22 23 24 2526 27 28 29 3031 32 33 34 3536 37 38 39 4041 42 43 44 4546 47 48 49 5051 52 53 54 5556 57 58 59 6061 62 63 64 6566 67 68 69 7071 72 73 74 7576 77 78 79 8081 82 83 84 8586 87 88 89 9091 92 93 94 9596 97 98 99 100101 102 103 104 105106 107 108 109 110111 112 113 114 115116 117 118 119 120121 122 123 124 125126 127 128 129 130131 132 133 134 135136 137 138 139 140141 142 143 144 145146 147 148 149 150151 152 153 154 155156 157 158 159 160161 162 163 164 165166 167 168 169 170171 172 173 174 175176 177 178 179 180181 182 183 184 185186 187 188 189 190191 | <?php /** * This is based on the code of S. Mohammed Alsharaf, http://www.zfsnippets.com/snippets/view/id/44. * * This class remains largely unchanged, although I used a much abbreviated piece of code for maintaining the aspect ratio. * * @license http://www.gnu.org/licenses/gpl-2.0.html GNU Public License * @author Cameron Germein (cameron@dhmedia.com.au) * @version 1.0 */class Image { protected $_filename = ''; protected $_image = ''; protected $_width = ''; protected $_height = ''; protected $_mime_type = ''; protected $_view = null; const IMAGETYPE_GIF = 'image/gif'; const IMAGETYPE_JPEG = 'image/jpeg'; const IMAGETYPE_PNG = 'image/png'; const IMAGETYPE_JPG = 'image/jpg'; public function setView($view) { $this->_view = $view; return $this; } public function open($filename) { $this->_filename = $filename; $this->_setInfo(); switch($this->_mime_type) { case self::IMAGETYPE_GIF : $this->_image = imagecreatefromgif($this->_filename); break; case self::IMAGETYPE_JPEG : case self::IMAGETYPE_JPG : $this->_image = imagecreatefromjpeg($this->_filename); break; case self::IMAGETYPE_PNG : $this->_image = imagecreatefrompng($this->_filename); break; default : throw new Exception('Image extension is invalid or not supported.'); break; } return $this; } protected function _output($save_in = null, $quality, $filters = null) { switch ($this->_mime_type) { case self::IMAGETYPE_GIF : return imagegif ( $this->_image, $save_in ); break; case self::IMAGETYPE_JPEG : case self::IMAGETYPE_JPG : $quality = is_null ( $quality ) ? 75 : $quality; return imagejpeg ( $this->_image, $save_in, $quality ); break; case self::IMAGETYPE_PNG : $quality = is_null ( $quality ) ? 0 : $quality; $filters = is_null ( $filters ) ? null : $filters; return imagepng ( $this->_image, $save_in, $quality, $filters ); break; default : throw new Exception('Image cannot be created.'); break; } } public function display($quality = null, $filters = null) { if ($this->_view instanceof Zend_View) { $this->_view->getResponse ()->setHeader ( 'Content-Type', $this->_mime_type ); } else { header ( 'Content-Type', $this->_mime_type ); } return $this->_output ( null, $quality, $filters ); } public function save($save_in = null, $quality = null, $filters = null) { return $this->_output ( $save_in, $quality, $filters ); } public function __destruct() { @imagedestroy ( $this->_image ); } protected function _setInfo() { $img_size = @getimagesize ( $this->_filename ); if (!$img_size) { throw new Exception ( 'Could not extract image size.' ); } elseif ($img_size[0] == 0 || $img_size[1] == 0) { throw new Exception ( 'Image has dimension of zero.' ); } $this->_width = $img_size[0]; $this->_height = $img_size[1]; $this->_mime_type = $img_size['mime']; } public function getWidth() { return $this->_width; } public function getHeight() { return $this->_height; } protected function _refreshDimensions() { $this->_height = imagesy ( $this->_image ); $this->_width = imagesx ( $this->_image ); } /** * If image is GIF or PNG keep transparent colors * * @credit http://github.com/maxim/smart_resize_image/tree/master * @param $image src of the image * @return the modified image */ protected function _handleTransparentColor($image = null) { $image = is_null ( $image ) ? $this->_image : $image; if (($this->_mime_type == self::IMAGETYPE_GIF) || ($this->_mime_type == self::IMAGETYPE_PNG)) { $trnprt_indx = imagecolortransparent ( $this->_image ); // If we have a specific transparent color if ($trnprt_indx >= 0) { // Get the original image's transparent color's RGB values $trnprt_color = imagecolorsforindex ( $this->_image, $trnprt_indx ); // Allocate the same color in the new image resource $trnprt_indx = imagecolorallocate ( $image, $trnprt_color ['red'], $trnprt_color ['green'], $trnprt_color ['blue'] ); // Completely fill the background of the new image with allocated color. imagefill ( $image, 0, 0, $trnprt_indx ); // Set the background color for new image to transparent imagecolortransparent ( $image, $trnprt_indx ); } elseif ($this->_mime_type == self::IMAGETYPE_PNG) { // Always make a transparent background color for PNGs that don't have one allocated already // Turn off transparency blending (temporarily) imagealphablending ( $image, false ); // Create a new transparent color for image $color = imagecolorallocatealpha ( $image, 0, 0, 0, 127 ); // Completely fill the background of the new image with allocated color. imagefill ( $image, 0, 0, $color ); // Restore transparency blending imagesavealpha ( $image, true ); } return $image; } } /** * Resize image based on max width and height * * @param integer $maxWidth * @param integer $maxHeight * @return resized image */ public function resize($max_width, $max_height) { if ($this->_width < $max_width && $this->_height < $max_height) { $this->_handleTransparentColor (); return $this; } //maintain the aspect ratio of the image. $ratio_orig = $this->_width/$this->_height; if ($max_width/$max_height > $ratio_orig) { $max_width = $max_height*$ratio_orig; } else { $max_height = $max_width/$ratio_orig; } //$newWidth = $this->_newDimension ( 'w', $maxWidth, $maxHeight ); //$newHeight = $this->_newDimension ( 'h', $maxWidth, $maxHeight ); $new_image = imagecreatetruecolor ( $max_width, $max_height ); $this->_handleTransparentColor ( $new_image ); imagecopyresampled ( $new_image, $this->_image, 0, 0, 0, 0, $max_width, $max_height, $this->_width, $this->_height ); $this->_image = $new_image; $this->_refreshDimensions(); return $this; }} |
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Snippet description
This is based on the code of S. Mohammed Alsharaf, http://www.zfsnippets.com/snippets/view/id/44.
I still don't like this code, far too many properties, most of which are being directly accessed, a hardwired path for thumbnails, and a number of other annoyances.
For this version of the Image view helper, I reworked it to support an array of configs that you pick from via parameter. You could easily pull the contents of the array from application.ini if you want.
It also eliminates the need for paths in the configuration, and should work correctly with your Zend app being run in sub directories.
I tried to clean up the code so the various paths to things are all set in the one location, which should make altering it for future development easier.
Basic usage is as follows:
<?= $this->image('id_name', '/path/to/image.jpg', array('alt' => 'image alt'), 'preset_name'); ?>
Snippet details
- Created:
-
Cameron
- Edited:
-
Cameron
- Revision Id:
- 146
- Edit Message:
- Fixed issue when no image passed in. Stupid bug, really.
- ZF Version
- 1.8.3
- Tags:
- view helper Images
- Comments:
- 0
- Views:
- 425
- Points:
- 0 (0 votes)