-[[!tag type/chrome patch]]
-[[!template id=gitbranch branch=smcv/trail author="[[smcv]]"]]
-
-Available from [[smcv]]'s git repository, in the `trail` branch. This
-plugin aims to solve [[todo/wikitrails]] in a simpler way.
-
-Updated, June 2011:
-
-* removed `inline` integration for now
-
-* added `<link>` tags
-
-* switched from a custom data structure to using typed links
+[[!tag patch]]
+[[!template id=gitbranch branch=smcv/trail3 author="[[smcv]]"]]
+
+Available from [[smcv]]'s git repository, in the `trail3` branch. This
+plugin aims to solve [[todo/wikitrails]] in a simpler way; it can also be
+used for [[navigation through blog posts|todo/Pagination_next_prev_links]].
+
+If you don't want to use a branch of ikiwiki, manual installation requires
+these files (use the "raw" link in gitweb to download):
+
+* [trail.pm](http://git.pseudorandom.co.uk/smcv/ikiwiki.git/blob/trail3:/IkiWiki/Plugin/trail.pm)
+ in an `IkiWiki/Plugin` subdirectory of your configured `plugindir`
+* [page.tmpl](http://git.pseudorandom.co.uk/smcv/ikiwiki.git/blob/trail3:/templates/page.tmpl)
+ and
+ [trails.tmpl](http://git.pseudorandom.co.uk/smcv/ikiwiki.git/blob/trail3:/templates/trails.tmpl)
+ in your configured `templatedir`, or a `templates` subdirectory of your wiki repository
+* the trail-related bits from the end of the
+ [stylesheet](http://git.pseudorandom.co.uk/smcv/ikiwiki.git/blob/trail3:/doc/style.css)
+ (put them in your local.css)
+* the trail-related bits at the end of the
+ [actiontabs](http://git.pseudorandom.co.uk/smcv/ikiwiki.git/blob/trail3:/themes/actiontabs/style.css)
+ or [blueview/goldtype](http://git.pseudorandom.co.uk/smcv/ikiwiki.git/blob/trail3:/themes/blueview/style.css)
+ stylesheets, if you use one of those themes (again, put them in your local.css)
+
+The branch also includes [[todo/test_coverage]] machinery.
+
+Demo:
+
+* [in use on entries in my blog](http://smcv.pseudorandom.co.uk/)
+* [a demo trail based on links](http://demo.hosted.pseudorandom.co.uk/trail/)
+* [a demo hybrid trail/inline](http://demo.hosted.pseudorandom.co.uk/trail2/)
+
+The page `e` is in both demo trails, to demonstrate how a page in more than
+one trail looks.
+
+The `smcv/trail2` branch is an older version of `trail3` which used typed links
+as its data structure, resulting in timing-related limitations (it couldn't
+select pages for the trail by using pagespecs, because pagespecs can't be
+evaluated correctly until the scan stage has finished).
+
+Updated, November 2011:
+
+* reinstated `inline` integration ([[report]] integration would probably be
+ pretty easy too, if this gets merged)
+* switched from typed links back to a custom data structure to avoid
+ chicken/egg problems with ordering
+* create typed links too, as a side-effect, but not when using an inline
+* regression test with nearly full coverage
+* CSS for the default anti-theme and all built-in themes (it looks nicest
+ in the default anti-theme and in actiontabs - the demo uses actiontabs)
+
+Known bugs:
+
+* the blueview and goldtype CSS nearly work, but the alignment is a bit off
+* a `trailinline` with no `sort` option is sorted in arbitrary order
----
[[!template id=plugin name=trail author="[[Simon_McVittie|smcv]]"]]
+[[!tag type/chrome]]
-It's sometimes useful to have "trails" of pages in a wiki, as a guided
-tour, sequence of chapters etc. In this plugin, a trail is represented
-by a page, and the pages in the trail are indicated by specially marked
-links within that page.
+This plugin provides the [[ikiwiki/directive/trailoptions]],
+[[ikiwiki/directive/traillink]], [[ikiwiki/directive/trailitem]],
+[[ikiwiki/directive/trailitems]]
+and [[ikiwiki/directive/trailinline]] [[directives|ikiwiki/directive]].
+
+It's sometimes useful to have "trails" of pages in a wiki where each
+page links to the next and/or previous page. For instance, you could use
+this for a guided tour, sequence of chapters, or sequence of blog posts.
+
+In this plugin, a trail is represented by a page, and the pages in the
+trail are indicated by specially marked links within that page, or by
+including groups of pages with a [[ikiwiki/directive]].
If using the default `page.tmpl`, each page automatically displays the
trails that it's a member of (if any), with links to the trail and to
the next and previous members. HTML `<link>` tags with the `prev`,
`next` and `up` relations are also generated.
-The `traillink` [[ikiwiki/directive]] is used to record which pages
-are in a trail, and simultaneously link to them. Alternatively, the
-[[ikiwiki/directive/trailitem]] directive can be used to make an
-invisible `traillink`.
-
-## Directives
-
-(These will go to the appropriate pages in [[ikiwiki/directive]] if this
-plugin is included in ikiwiki.)
+The [[ikiwiki/directive/trailoptions]] directive sets options for the
+entire trail.
-### trailitem
+Pages can be included in a trail in various ways:
-The `trailitem` directive is supplied by the [[!iki plugins/contrib/trail desc=trail]]
-plugin. It is used like this:
+* The [[ikiwiki/directive/trailinline]] directive sets up an [[inline]],
+ and at the same time adds the matching pages (from `pages` or `pagenames`)
+ to the trail. One use is to navigate through all posts in a blog:
- \[[!trailitem some_other_page]]
+ \[[!trailinline pages="page(./posts/*) and !*/Discussion" archive=yes
+ feedshow=10 quick=yes]]
-to add `some_other_page` to the trail represented by this page, without
-generating a visible hyperlink.
+ This directive only works if the [[!iki plugins/inline desc=inline]]
+ plugin is also enabled.
-### traillink
+* The [[ikiwiki/directive/trailitems]] directive has optional `pages` and
+ `pagenames` options which behave the same as in [[inline]], but don't
+ produce any output in the page, so you can have trails that don't list
+ all their pages.
-The `traillink` directive is supplied by the [[!iki plugins/contrib/trail desc=trail]]
-plugin. It generates a visible [[ikiwiki/WikiLink]], and also adds the linked page to
-the trail represented by the page containing the directive.
+* The [[ikiwiki/directive/traillink]] directive makes a visible link
+ and also adds the linked page to the trail. This will typically be
+ used in a bullet list, but could also be in paragraph text:
-In its simplest form, the first parameter is like the content of a WikiLink:
+ * [[!traillink Introduction]]
+ * [[!traillink "Chapter 1"]]
+ * [[!traillink Chapter_2]]
+ * [[!traillink Appendix_A]]
- \[[!traillink some_other_page]]
+ or
-The displayed text can also be overridden, either with a `|` symbol or with
-a `text` parameter:
+ To use this software you must \[[!traillink install]] it,
+ \[[!traillink configuration text="configure it"]],
+ and finally \[[!traillink running|run_it]].
- \[[!traillink Click_here_to_start_the_trail|some_other_page]]
- \[[!traillink some_other_page text="Click here to start the trail"]]
-
-### trailoptions
-
-The `trailoptions` directive is supplied by the [[!iki plugins/contrib/trail desc=trail]]
-plugin. It sets options for the trail represented by this page. Example usage:
-
- \[[!trailoptions sort="meta(title)" circular="no"]]
-
-The available options are:
-
-* `sort`: sets a [[ikiwiki/pagespec/sorting]] order; if not specified, the
- items of the trail are ordered according to the first link to each item
- found on the trail page
-
-* `circular`: if set to `yes` or `1`, the trail is made into a loop by
- making the last page's "next" link point to the first page, and the first
- page's "previous" link point to the last page
-
-----
+ This also counts as a [[ikiwiki/WikiLink]] for things like the `link()`
+ [[ikiwiki/PageSpec]] item.
-## Future directions
+* The [[ikiwiki/directive/trailitem]] directive adds a page to the trail
+ like `traillink`, but produces an invisible link, rather like `\[[!tag]]`:
-The current version of this plugin doesn't implement inline-based or
-otherwise [[ikiwiki/PageSpec]]-based trails. This is difficult because
-there's a circular dependency:
+ To use this software you must \[[!traillink install]] it,
+ \[[!trailitem installing_from_packages]]
+ \[[!trailitem installing_from_source]]
+ \[[!traillink configuration text="configure it"]],
+ and finally \[[!traillink running|run_it]].
+ \[[!trailitem troubleshooting]]
-* adding typed links should happen *before* scanning has finished, to
- guarantee that they're available before the first page is rendered
+ Like `\[[!tag]]`, this still counts as a [[ikiwiki/WikiLink]] even though
+ there's no visible link.
-* evaluating pagespecs should only happen *after* scanning has finished,
- to guarantee that everything you might want to base a pagespec on
- (`meta`, etc.) has been gathered by scanning
+You can mix several of these directives in one page. The resulting
+trail will contain all of the pages matched by any of the directives,
+in the same order that the directives appear (unless you use the `sort` or
+`reverse` options on `\[[!trailoptions]]`).