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‎README.md

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# Joomla Content - Automatic Intro Image plugin
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This is the Content - Automatic Intro Image plugin for Joomla 3.2+.
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This plugin automatically create a resized version of the full size article image and set it as the intro image.Simply enable the plugin, set parameters and let blank the intro image field when saving the article.
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See https://github.com/mattiaverga/JAutomaticIntroImage/wiki for more help.
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## Changelog
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### v1.0
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* Initial release

‎automaticintroimage.php

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<?php
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/**
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* @copyright Copyright (c) 2016- Mattia Verga. All rights reserved.
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* @license GNU General Public License version 3, or later
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*/
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// no direct access
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defined( '_JEXEC' ) or die;
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class plgContentAutomaticIntroImage extends JPlugin
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{
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/**
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* Load the language file on instantiation. Note this is only available in Joomla 3.1 and higher.
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* If you want to support 3.0 series you must override the constructor
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*
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* @var boolean
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* @since 3.1
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*/
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protected $autoloadLanguage = true;
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/**
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* Automatic creation of resized intro image from article full image
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*
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* @param string $context The context of the content being passed to the
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plugin.
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* @param mixed $article A reference to the JTableContent object that is
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being saved which holds the article data.
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* @param boolean $isNew A boolean which is set to true if the content
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is about to be created.
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*
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* @return boolean True on success.
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*/
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public function onContentBeforeSave($context, $article, $isNew)
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{
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// Check if we're saving an article
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$allowed_contexts = array('com_content.article');
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if (!in_array($context, $allowed_contexts))
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{
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return true;
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}
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$images = json_decode($article->images);
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// Return if full article image is not set or empty
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if (!isset($images->image_fulltext) or empty($images->image_fulltext))
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{
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return true;
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}
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// Return if intro image is already set
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if (isset($images->image_intro) and !empty($images->image_intro))
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{
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return true;
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}
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$width = $this->params->get('Width');
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$height = $this->params->get('Height');
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// Create resized image
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$thumb = new Imagick(JPATH_ROOT . '/' . $images->image_fulltext);
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$thumb->resizeImage($width,
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$height,
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Imagick::FILTER_LANCZOS,
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1,
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$this->params->get('MaintainAspectRatio')
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);
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// Get real image dimensions if maintain aspect ratio was selected
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if ($this->params->get('MaintainAspectRatio') == 1)
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{
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$width = $thumb->getImageWidth();
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$height = $thumb->getImageHeight();
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}
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// Set image intro name
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// {width} and {height} placeholders are changed to values
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$suffix = $this->params->get('Suffix');
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if (strpos($suffix, "{width}") !== false or
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strpos($suffix, "{height}") !== false)
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{
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$suffix = str_replace(array("{width}","{height}"),
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array($width,$height),
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$suffix);
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}
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$extension_pos = strrpos($images->image_fulltext, '.');
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$images->image_intro = substr($images->image_fulltext, 0, $extension_pos) .
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$suffix .
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substr($images->image_fulltext, $extension_pos);
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// Copy Alt and Title fields
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if ($this->params->get('CopyAltTitle') == 1 and
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($images->image_fulltext_alt != "" or
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$images->image_fulltext_caption != ""))
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{
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$images->image_intro_alt = $images->image_fulltext_alt;
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$images->image_intro_caption = $images->image_fulltext_caption;
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}
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// Write resized image if it doesn't exist
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// and set Joomla object values
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if (!file_exists(JPATH_ROOT . '/' . $images->image_intro))
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{
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$thumb->writeImage(JPATH_ROOT . '/' . $images->image_intro);
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}
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$article->images = json_encode($images);
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$thumb->destroy();
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return true;
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}
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}
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?>

‎automaticintroimage.xml

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<?xml version="1.0" encoding="utf-8"?>
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<extension version="3.2" type="plugin" group="content" method="upgrade">
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<name>Content - Automatic Intro Image</name>
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<author>Mattia Verga</author>
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<creationDate>23 October 2016</creationDate>
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<copyright>Copyright (C) 2016 Mattia Verga. All rights reserved.</copyright>
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<license>GNU General Public License version 3 or later.</license>
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<authorEmail>mattia.verga@tiscali.it</authorEmail>
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<version>1.0</version>
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<description>PLG_CONTENT_AUTOMATICINTROIMAGE_XML_DESCRIPTION</description>
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<files>
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<filename plugin="automaticintroimage">automaticintroimage.php</filename>
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<filename>index.html</filename>
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<folder>language</folder>
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</files>
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<languages>
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<language tag="en-GB">language/en-GB/en-GB.plg_content_automaticintroimage.ini</language>
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<language tag="en-GB">language/en-GB/en-GB.plg_content_automaticintroimage.sys.ini</language>
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<language tag="it-IT">language/it-IT/it-IT.plg_content_automaticintroimage.ini</language>
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<language tag="it-IT">language/it-IT/it-IT.plg_content_automaticintroimage.sys.ini</language>
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</languages>
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<config>
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<fields name="params">
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<fieldset name="basic">
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<field name="Width" type="number"
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default="320"
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description="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_WIDTH_DESCRIPTION"
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label="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_WIDTH_LABEL"
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filter="integer"
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min="10"
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max="2000"
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size="4"
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required="1"
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/>
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<field name="Height" type="number"
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default="240"
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description="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_HEIGHT_DESCRIPTION"
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label="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_HEIGHT_LABEL"
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filter="integer"
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min="10"
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max="2000"
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size="4"
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required="1"
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/>
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<field name="MaintainAspectRatio" type="radio"
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default="1"
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description="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_RATIO_DESCRIPTION"
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label="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_RATIO_LABEL"
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>
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<option value="0">PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_NO</option>
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<option value="1">PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_YES</option>
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</field>
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<field name="CopyAltTitle" type="radio"
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default="1"
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description="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_TEXT_DESCRIPTION"
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label="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_TEXT_LABEL"
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>
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<option value="0">PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_NO</option>
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<option value="1">PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_YES</option>
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</field>
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<field name="Suffix" type="text"
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default="_thumb"
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description="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_SUFFIX_DESCRIPTION"
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label="PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_SUFFIX_LABEL"
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required="1"
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/>
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</fieldset>
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</fields>
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</config>
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</extension>

‎index.html

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<html><body></body></html>

‎language/en-GB/en-GB.plg_content_automaticintroimage.ini

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; Mattia Verga
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; Copyright (C) 2016. All rights reserved.
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; License GNU General Public License version 2 or later.
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; Note : All ini files need to be saved as UTF-8
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PLG_CONTENT_AUTOMATICINTROIMAGE="Content - Automatic Intro Image"
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PLG_CONTENT_AUTOMATICINTROIMAGE_XML_DESCRIPTION="This plugin automatically create a resized version of the full size article image and set it as the intro image.<BR/>Simply enable the plugin, set parameters and let blank the intro image field when saving the article."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_WIDTH_LABEL="Width of resized image"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_WIDTH_DESCRIPTION="Set the width of the resized image. If 'maintain aspect ratio' option is selected, this value will act as the max width of the resized image."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_HEIGHT_LABEL="Height of resized image"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_HEIGHT_DESCRIPTION="Set the height of the resized image. If 'maintain aspect ratio' option is selected, this value will act as the max height of the resized image."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_RATIO_LABEL="Maintain aspect ratio"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_RATIO_DESCRIPTION="If selected, width and height will be resized proportionally."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_TEXT_LABEL="Copy text"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_TEXT_DESCRIPTION="If selected, the 'Alt' and 'Title' fields of the full article image will be copied in intro image fields."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_SUFFIX_LABEL="Suffix of resized image"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_SUFFIX_DESCRIPTION="This will be the suffix applied to the resized image."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_YES="Yes"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_NO="No"

‎language/en-GB/en-GB.plg_content_automaticintroimage.sys.ini

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; Mattia Verga
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; Copyright (C) 2016. All rights reserved.
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; License GNU General Public License version 2 or later.
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; Note : All ini files need to be saved as UTF-8
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PLG_CONTENT_AUTOMATICINTROIMAGE="Content - Automatic Intro Image"
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PLG_CONTENT_AUTOMATICINTROIMAGE_XML_DESCRIPTION="This plugin automatically create a resized version of the full size article image and set it as the intro image.<BR/>Simply enable the plugin, set parameters and let blank the intro image field when saving the article."

‎language/it-IT/it-IT.plg_content_automaticintroimage.ini

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; Mattia Verga
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; Copyright (C) 2016. All rights reserved.
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; License GNU General Public License version 2 or later.
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; Note : All ini files need to be saved as UTF-8
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PLG_CONTENT_AUTOMATICINTROIMAGE="Content - Automatic Intro Image"
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PLG_CONTENT_AUTOMATICINTROIMAGE_XML_DESCRIPTION="Questo plugin crea automaticamente un'immagine ridimensionata a partire dall'immagine articolo esteso impostata per l'articolo.<BR/>Basta abilitare il plugin, selezionare l impostazioni e lasciare non compilata il campo 'Immagine introduttiva' durante il salvataggio dell'articolo."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_WIDTH_LABEL="Larghezza immagine"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_WIDTH_DESCRIPTION="Imposta la larghezza dell'immagine ridimensionata. Se è abilitata l'opzione 'Mantieni proporzioni', questo valore sarà la massima larghezza che l'immagine ridimensionata potrà assumere."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_HEIGHT_LABEL="Altezza immagine"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_HEIGHT_DESCRIPTION="Imposta l'altezza dell'immagine ridimensionata. Se è abilitata l'opzione 'Mantieni proporzioni', questo valore sarà la massima altezza che l'immagine ridimensionata potrà assumere."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_RATIO_LABEL="Mantieni proporzioni"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_RATIO_DESCRIPTION="Se abilitata, l'immagine verrà ridimensionata mantenendo le proporzioni dell'immagine originale."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_TEXT_LABEL="Copia testo"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_TEXT_DESCRIPTION="Se abilitata, verranno copiati nell'immagine introduttiva il testo alternativo e la didascalia impostati per l'immagine articolo esteso."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_SUFFIX_LABEL="Suffisso dell'immagine ridimensionata"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_SUFFIX_DESCRIPTION="Questo sarà il suffisso applicato all'immagine ridimensionata."
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_YES="Sì"
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PLG_CONTENT_AUTOMATICINTROIMAGE_PARAM_NO="No"

‎language/it-IT/it-IT.plg_content_automaticintroimage.sys.ini

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; Mattia Verga
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; Copyright (C) 2016. All rights reserved.
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; License GNU General Public License version 2 or later.
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; Note : All ini files need to be saved as UTF-8
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PLG_CONTENT_AUTOMATICINTROIMAGE="Content - Automatic Intro Image"
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PLG_CONTENT_AUTOMATICINTROIMAGE_XML_DESCRIPTION="Questo plugin crea automaticamente un'immagine ridimensionata a partire dall'immagine articolo esteso impostata per l'articolo.<BR/>Basta abilitare il plugin, selezionare l impostazioni e lasciare non compilata il campo 'Immagine introduttiva' durante il salvataggio dell'articolo."

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