Displaying a read more link after excerpt, with Autonav
January 27th, 2013 by billHere is an example AutoNav filter that will display a “Read More” link, for posts in a list.
We invoke this as follows:
[autonav display="posts,list,title,nothumb,excerpt" count=5 postid="category:autonav-plugin" class="readmore"]
Live demo form the posts on this site:
- Displaying Posts with AutoNav
- Selecting attachments by tag
- AutoNav and Attachment Taxonomy Support
- Listing categories with AutoNav
Let's explore how we can use the AutoNav plugin for WordPress to display some posts from a category.
- More AutoNav filters
Put this code in your theme’s functions.php:
function autonav_excerpt_readmore($html, $class, $pic, $attr) {
if ($attr['display'] == 'posts' && $attr['class'] == 'readmore') {
if (strlen($pic['excerpt'])) {
$html .= '<a href="' . $pic['permalink'] . '">' . __('Read more') . '...</a>';
}
}
return $html;
}
add_filter('autonav_create_list_item', 'autonav_excerpt_readmore',
50, 4);
The filter is added with priority 50, so it will be inserted after the excerpt. The function only inserts the “Read More” link if the class="readmore" parameter is used in the AutoNav invocation, and only if posts are listed, and only if the post actually had an excerpt.
NOTE: The above was originally asked here.
Displaying Posts with AutoNav
January 27th, 2013 by billHere are a few examples of using AutoNav to display posts, as a live demo on this site.
The most recent 3 published posts
[autonav display="posts,list,title,nothumb" count=3 postid="status:publish"]
- Displaying a read more link after excerpt, with Autonav
- Selecting attachments by tag
- AutoNav and Attachment Taxonomy Support
The alphabetically-first three posts
[autonav display="posts,list,title,nothumb" orderby="title" count=3 order="ASC" postid="status:publish"]
Three random posts
[autonav display="posts,list,title,nothumb" orderby="rand" count=3 postid="status:publish"]
- Displaying a read more link after excerpt, with Autonav
- Selecting attachments by tag
- More AutoNav filters
(refresh this page to see different random posts).
Posts that must be in two categories
[autonav display="posts,list,title,nothumb" postid="category__and:autonav-plugin,plugin-compatible"]
Selecting attachments by tag
August 27th, 2012 by billWith AutoNav, you can now select attachments from any post or page using:
[autonav display="attached" postid="-1,tag:dessert" orderby="rand" count="6"]
which would display a gallery of six images, randomly chosen from all the attachments (regardless of their parent post or page) and tagged with the “dessert” tag with the Media Tags plugin.
Live demo from this site:
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Note that, because the Media Tags plugin is not installed, and because we have not set the correct taxonomies on the AutoNav settings on the WordPress administration screens on this site, that six random attachments from the entire site are displayed in the above example.
For correct operation, you must set the attachment taxonomy to “media-tags” for the Media Tags plugin; for the Attachment Taxonomy plugin, use “attachment_tag”. Other taxonomy names are permissible in hopes of being compatible with future WP versions.
AutoNav and Attachment Taxonomy Support
August 27th, 2012 by billThe AutoNav plugin now supports the tag and category taxonomies that the Attachment Taxonomy Support plugin creates. Once you go thru the AutoNav settings screens. you can for example use:
[autonav display="attached" postid="tag:chocolate"]
to display a gallery of all images, attached to the current post or page, and having the tag “chocolate” … or you can even do:
[autonav display="attached" postid="-1,category:dessert"]
which will display a gallery of images in the “chocolate” attachment category, attached to any post or page.
Grand Falls, Arizona
April 23rd, 2012 by billThe Grand Falls of the Little Colorado River, northern Arizona
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Standing on a corner in Winslow, Arizona
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Listing categories with AutoNav
November 12th, 2011 by billLet’s explore how we can use the AutoNav plugin for WordPress to display some posts from a category.
(Note: We assume here at least version 1.4.5 of AutoNav).
This will display a list of all the posts in the dessert category, five at a time, with page navigation if there are more than 5. The count=-1 means display all the posts (without that, only the most recent 5 would be displayed)
Now let’s add a custom function which will display the post date, and the modification date if different:
Put this in your theme’s functions.php:
function autonav_list_date($html, $class, $pic, $attr) {
$postdate = substr($pic['page']->post_date,0,10);
$postmodified = substr($pic['page']->post_modified,0,10);
$html .= "<br>Posted $postdate" ;
$html .= ($postdate == $postmodified)?'':" (last modified $postmodified)";
return $html;
}
add_filter('autonav_create_list_item', 'autonav_list_date', 50, 4);
Now let’s change that so only invocations with a specific class will activate that function in AutoNav lists:
function autonav_list_date($html, $class, $pic, $attr) {
if ($attr['class'] == 'withdate') {
$postdate = substr($pic['page']->post_date,0,10);
$postmodified = substr($pic['page']->post_modified,0,10);
$html .= "<br>Posted $postdate" ;
$html .= ($postdate == $postmodified)?'':" (last modified $postmodified)";
}
return $html;
}
This now needs to be invoked with:
[autonav display="posts,list" postid="category:dessert" paged=5 count=-1 class="withdate"]
More AutoNav filters
October 30th, 2011 by billMissing Image text replacement
With AutoNav 1.4.5 and above: Replace the “Missing Image” text (when a page or post does not have any attached or featured image) with the title of the target page/post:
function my_missing_image($html, $pic) {
return $pic['title'];
}
add_filter('autonav_missing_image', 'my_missing_image', 10, 2);
AutoNav 1.4.5 update beta2
October 27th, 2011 by billNow in the works is an update to AutoNav — 1.4.5 is our current internal version. This update will feature:
- Supports the Media Tags plugin with the new id=”tag:tagvalue” selector for display=”attached”
- id= is now an alias for postid=
- Replaces glob() with opendir() and readdir(). Caches directory information for faster operation with multiple AutoNav invocations on a page/post.
- A patch to properly name thumbnails of PNGs and GIFs as .jpg
- Ignores spaces in the display modifiers. New display modifier parsing permits mixed modifiers: e.g., postid="category:recipes,tag:dessert"
- Missing-image and other errors displayed inside an autonav-error span element, so their display can be disabled. Also a new filter autonav-missing-image to edit or replace that text.
- Support custom post type and taxonomy names with dashes
- New filters permit additional thumbnail processing:
- autonav_thumb ( $pic_info, $attr, $post )
Given the shortcode parameters in $attr and a page or postid in $post, if $pic_info is empty, then possibly create a $pic_info record with thumbnail image information. By default the chain of searches is featured image, specified image (in the subpage-thumb custom field), and the first attached image. An additional auxiliary plugin is planned to support NextGEN Gallery thumbnails. - autonav_get_thumbnails ($pics_info, $attr, $pic_size_info)
Takes a list of pages/posts/images in $pics_info, and the shortcode parameters in $attr, along with the list of found images-and-associated-thumbnails in $pic_size_info; for each entry in $pics_info, either chooses an image from $pic_size_info or else creates a resized image. Returns an updated $pics_info.
- autonav_thumb ( $pic_info, $attr, $post )
- New filters permit pre-and post-processing during image resizing:
- autonav_image_create ($image_resource, $pic_full_path, $attr, $ext)
If $image_resource is NULL, and given the original file in $pic_full_path having the extension type $ext (e.g., “jpg”), then using the shortcode parameters in $attr, attempt to create and return a PHP image resource from the file. - autonav_resize_image ($from_image, $attr, $prefix)
Accepts a PHP image resource in $from_image, and based on the shortcode parameters in $attr and the thumbnail prefix size (e.g., ‘medium’), returns either the original $from_image or a resized or filtered PHP image resource. NOTE: The filter must compute the size of its input image with the imagesx() and imagesy() functions.
- autonav_image_create ($image_resource, $pic_full_path, $attr, $ext)
- New filters for extensions like NextGEN Gallery thumbnail support, and for taxonomy-images plugin. These are then implemented in auxiliary plugins, or theme files.
If you are interested in beta-testing, please download here and email Bill with your comments or issues.