[Plugin: Top 10] Filter for image link

(@riccardof)

Hi,
I started using the plugin, but wasn’t happy with the fact that the post images were not the right size, so I added a filter in the plugin to get a place to customize the url.

This is the code, if you find it useful you can add it to the next version of the plugin!

function tptn_get_the_post_thumbnail($postid) {

	$result = get_post($postid);
	$tptn_settings = tptn_read_options();
	$output = '';

	if (function_exists('has_post_thumbnail') && has_post_thumbnail($result->ID)) {
	  $postimage = wp_get_attachment_image_src( get_post_thumbnail_id($result->ID), 'thumbnail');
	  $postimage = apply_filters( 'tp10_postimage', $postimage[0], $tptn_settings[thumb_width], $tptn_settings[thumb_height] );
	  $output .= '<img src="'.$postimage.'" alt="'.$title.'" title="'.$title.'" style="max-width:'.$tptn_settings[thumb_width].'px;max-height:'.$tptn_settings[thumb_height].'px;" border="0" class="tptn_thumb" />';

	//	$output .= get_the_post_thumbnail($result->ID, array($tptn_settings[thumb_width],$tptn_settings[thumb_height]), array('title' => $title,'alt' => $title, 'class' => 'tptn_thumb', 'border' => '0'));
	} else {
		$postimage = get_post_meta($result->ID, $tptn_settings[thumb_meta], true);	// Check
		if (!$postimage && $tptn_settings['scan_images']) {
			preg_match_all( '|<img.*?src=[\'"](.*?)[\'"].*?>|i', $result->post_content, $matches );
			// any image there?
			if (isset($matches) && $matches[1][0]) {
				$postimage = $matches[1][0]; // we need the first one only!
			}
		}
		if (!$postimage) $postimage = get_post_meta($result->ID, '_video_thumbnail', true); // If no other thumbnail set, try to get the custom video thumbnail set by the Video Thumbnails plugin
		if ($tptn_settings['thumb_default_show'] && !$postimage) $postimage = $tptn_settings[thumb_default]; // If no thumb found and settings permit, use default thumb
		if ($postimage) {
		  $postimage = apply_filters( 'tp10_postimage', $postimage, $tptn_settings[thumb_width], $tptn_settings[thumb_height] );
		  $output .= '<img src="'.$postimage.'" alt="'.$title.'" title="'.$title.'" style="max-width:'.$tptn_settings[thumb_width].'px;max-height:'.$tptn_settings[thumb_height].'px;" border="0" class="tptn_thumb" />';
		}
	}

	return $output;
}

It can be slightly optimized, but I didn’t do it to keep the modifications to the code minimal.

Hope it helps.
Riccardo
http://www.gurtip.it

http://wordpress.org/extend/plugins/top-10/

Viewing 8 replies - 1 through 8 (of 8 total)

Plugin Author Ajay
(@ajay)

13 years, 8 months ago

Riccardo, could you please explain what exactly does this achieve?
Thread Starter Riccardo
(@riccardof)

13 years, 8 months ago
In the settings for the plugin you can decide the size of the picture, but you then use the image from the post directly.
In my specific example, I use a library to resize the image on the fly so that it doesn’t have to happen in the browser. So, in my case, the filter looks like this:
```
function scale_tp10_thumbs($postimage, $width, $height) {
  $new_pi = get_bloginfo("template_directory")."/img.php?src=$postimage&w=$width&h=$height";
  return $new_pi;
}
add_filter('tp10_postimage', 'scale_tp10_thumbs', 10, 3);
```
I couldn’t figure out another way to deliver the image in the right size.

I guess another a bit more invasive way (for me, for you it might actually be a better solution) is to let the user decide which image size to use.

Riccardo
http://www.gurtip.it
Plugin Author Ajay
(@ajay)

13 years, 8 months ago

I think it is clearer now. If I understand it correctly, you’re giving the user the freedom to run a filter on the post image. In your case you have the img.php script which resizes the same?

Thread Starter Riccardo
(@riccardof)

13 years, 8 months ago

That’s right, to the filter I am passing the link to the image and the size it will be visualized on the browser.
I use the filter to pre-process the image to the expected size, so that the resource sent to the user is smaller and there is no client-side resizing of the image.

Riccardo
http://www.gurtip.it

Plugin Author Ajay
(@ajay)

13 years, 8 months ago

Riccardo, I might be able to implement this using the inbuilt timthumb which might give better results to all users.

Thanks for the code. I’ll run some tests to see if I get the desired result

Plugin Author Ajay
(@ajay)

13 years, 7 months ago

Riccardo, I’ve implemented the code in version 1.9.

Thread Starter Riccardo
(@riccardof)

13 years, 7 months ago

Cool, glad you found it useful.

Riccardo

Plugin Author Ajay
(@ajay)

13 years, 7 months ago

Indeed. I’ve used it to resize the thumbnails using timthumb.

You shouldn’t need to use your code above anymore to resize. If you need to you should use remove_filter('tp10_postimage', 'ald_scale_thumbs') before you apply your code with the add_filter

Viewing 8 replies - 1 through 8 (of 8 total)

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