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<?php
/**
* @copyright Copyright (C) 2011 Simplify Your Web, Inc. All rights reserved.
* @license GNU General Public License version 3 or later; see LICENSE.txt
*/
// no direct access
defined('_JEXEC') or die ;
jimport('joomla.filesystem.file');
jimport('joomla.form.formfield');
/**
*
* @author Olivier Buisard
*
* field parameters
*
* accept: allowed extensions - defaults to .gif,.jpg,.png
* size
* maxlength
* class
* disabled
* onchange
* showpreview: show the file preview - defaults to false
* width: the preview max width - defaults to 200
* height: the preview max width
* showname: show the file name - defaults to false
*
*/
class JFormFieldSYWImageFilePreview extends JFormField
{
public $type = 'SYWImageFilePreview';
protected $width;
protected $height;
protected $show_name;
protected $show_preview;
protected $clear;
protected function getInput()
{
$html = '';
$lang = JFactory::getLanguage();
$lang->load('lib_syw.sys', JPATH_SITE);
if ($this->show_preview) {
JFactory::getDocument()->addScriptDeclaration('
document.addEventListener("readystatechange", function(event) {
if (event.target.readyState == "complete") {
document.getElementById("' . $this->id . '_file").addEventListener("change", on' . $this->id . 'FileSelected, false);
function on' . $this->id . 'FileSelected (input) {
if (input.target.files[0]) {
file = input.target.files[0];
file_path = (window.URL || window.webkitURL).createObjectURL(file);
let reader = new FileReader();
reader.readAsDataURL(file);
reader.onloadend = function(evt) {
if (evt.target.readyState == FileReader.DONE) {
let image_preview = document.querySelector("#' . $this->id . '_preview img");
if (image_preview != null) {
image_preview.setAttribute("src", file_path);
document.getElementById("' . $this->id . '_preview").querySelector(".image_preview").style.display = "block";
document.getElementById("' . $this->id . '_preview").querySelector(".no_preview").style.display = "none";
let filename = document.querySelector("#' . $this->id . '_preview .file_name");
if (filename != null) {
filename.textContent = file.name;
}
}
}
}
}
}
}
});
');
} else {
JFactory::getDocument()->addScriptDeclaration('
document.addEventListener("readystatechange", function(event) {
if (event.target.readyState == "complete") {
document.getElementById("' . $this->id . '_file").addEventListener("change", on' . $this->id . 'FileSelected, false);
function on' . $this->id . 'FileSelected (input) {
if (input.target.files[0]) {
file = input.target.files[0];
file_path = (window.URL || window.webkitURL).createObjectURL(file);
let reader = new FileReader();
reader.readAsDataURL(file);
reader.onloadend = function(evt) {
if (evt.target.readyState == FileReader.DONE) {
document.getElementById("' . $this->id . '_filename").value = file.name;
}
}
}
}
}
});
');
}
// Initialize some field attributes.
$accept = $this->element['accept'] ? ' accept="' . (string) $this->element['accept'] . '"' : ' accept=".gif,.jpg,.png"';
$size = $this->element['size'] ? ' size="' . (int) $this->element['size'] . '"' : '';
$maxLength = $this->element['maxlength'] ? ' maxlength="' . (int) $this->element['maxlength'] . '"' : '';
$class = $this->element['class'] ? ' class="' . (string) $this->element['class'] . '"' : '';
$disabled = ((string) $this->element['disabled'] == 'true') ? ' disabled="disabled"' : '';
$onchange = $this->element['onchange'] ? ' onchange="' . (string) $this->element['onchange'] . '"' : '';
$html .= '<input type="file" name="' . $this->getName($this->fieldname . '_file') . '" id="' . $this->id . '_file"' . $accept . $disabled . $class . $size . $maxLength . $onchange . ' />';
$html .= '<input type="hidden" name="' . $this->name . '" id="' . $this->id . '"' . ' value="'. htmlspecialchars($this->value, ENT_COMPAT, 'UTF-8') .'" />';
$path = htmlspecialchars($this->value, ENT_COMPAT, 'UTF-8');
if ($this->show_preview) {
$style = '';
$style .= 'max-width: '.$this->width.'px;';
if (!empty($this->height)) {
$style .= 'max-height: '.$this->height.'px;';
}
$html .= '<div id="'.$this->id.'_preview" style="'.$style.' overflow: auto; border: 1px solid #ccc; border-radius: 3px; padding: 10px; margin-top: 5px; text-align: center">';
$html .= '<div class="image_preview" style="display: ' . (empty($path) ? 'none' : 'block') . '">';
$parts = explode('/', $path);
$html .= '<img src="'.JURI::root().$path.'" alt="'.end($parts).'" style="max-width: 100%">';
if ($this->show_name) {
$html .= '<br /><br /><span class="file_name">'.end($parts).'</span>';
}
// clear button
if ($this->clear) {
$onclick = 'jQuery(\'#' . $this->id . '_preview\').find(\'.image_preview\').hide();';
$onclick .= 'jQuery(\'#' . $this->id . '\').val(\'\');';
$onclick .= 'jQuery(\'#' . $this->id . '_file\').val(\'\');';
$onclick .= 'jQuery(\'#' . $this->id . '_preview\').find(\'.no_preview\').show();';
$onclick .= 'return false;';
$html .= '<br /><br /><button onclick="' . $onclick . '" class="btn btn-small btn-danger">' . JText::_('JACTION_DELETE') . '</button>';
}
$html .= '</div>';
$html .= '<div class="no_preview" style="display: ' . (empty($path) ? 'block' : 'none') . '">';
$html .= '<span>'.JText::_('LIB_SYW_IMAGEPREVIEW_NOPREVIEW').'</span>';
$html .= '</div>';
$html .= '</div>';
} else {
$html .= '<br /><br />';
$parts = explode('/', $path);
if ($this->clear) {
$html .= '<div class="input-append">';
}
$html .= '<input id="'.$this->id.'_filename" type="text" disabled="disabled" value="'.end($parts).'" />';
if ($this->clear) {
$onclick = 'jQuery(\'#' . $this->id . '_filename\').val(\'\');';
$onclick .= 'jQuery(\'#' . $this->id . '\').val(\'\');';
$onclick .= 'jQuery(\'#' . $this->id . '_file\').val(\'\');';
$onclick .= 'return false;';
$html .= '<button onclick="' . $onclick . '" class="btn btn-danger">' . JText::_('JACTION_DELETE') . '</button>';
$html .= '</div>';
}
}
return $html;
}
public function setup(SimpleXMLElement $element, $value, $group = null)
{
$return = parent::setup($element, $value, $group);
if ($return) {
$this->width = isset($this->element['width']) ? trim((string)$this->element['width']) : '200';
$this->height = isset($this->element['height']) ? trim((string)$this->element['height']) : '';
$this->show_name = isset($this->element['showname']) ? filter_var($this->element['showname'], FILTER_VALIDATE_BOOLEAN) : false;
$this->show_preview = isset($this->element['showpreview']) ? filter_var($this->element['showpreview'], FILTER_VALIDATE_BOOLEAN) : false;
$this->clear = isset($this->element['clear']) ? filter_var($this->element['clear'], FILTER_VALIDATE_BOOLEAN) : true;
}
return $return;
}
}