X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/a86fade7a9684d9614e13fbedf739fc0add17141..9685693284103c8d98b5399eeefc1dde75081610:/doc/bugs/html5_support.mdwn?ds=sidebyside diff --git a/doc/bugs/html5_support.mdwn b/doc/bugs/html5_support.mdwn index bdeeba768..ba67d532b 100644 --- a/doc/bugs/html5_support.mdwn +++ b/doc/bugs/html5_support.mdwn @@ -1,47 +1,117 @@ -Some elements of [HTML5](http://www.whatwg.org/specs/web-apps/current-work/multipage/) can be safely supported by ikiwiki. There are [several differences between HTML4 and HTML5](http://www.w3.org/TR/html5-diff/). Unsupported new elements _should degrade gracefully_. - -> In the `origin/html` branch, there is an old work in progress to make -> ikiwiki use html 4 instead of xhtml. If that could be brought forward and -> finished then the plan has been to switch ikiwiki over to doing html 4. -> I don't think it makes sense to try to make it support both xhtml and -> html, it would complicate the code for no benefit. -> -> I think that is the best route toward supporting html 5 as well. Get -> ikiwiki doing html 4 first and the changes needed to get to 5 from there -> should be small. Probably just changing some doctypes and a few other -> small changes which could be kept in a branch, or even shipped in ikiwiki -> mainline as an alternate set of templates. Some of the changes, like -> supporting new html 5 tags in the htmlscrubber, can be done in mainline. -> (Like was already done for the html 5 video and audio tags.) +Some elements of +[HTML5](http://www.whatwg.org/specs/web-apps/current-work/multipage/) can be +safely supported by ikiwiki. There are [several differences between HTML4 and +HTML5](http://www.w3.org/TR/html5-diff/). + +[[!template id=gitbranch branch=hendry/html5 author="[[Kai_Hendry|hendry]]"]] + +* [HTML5 branch](http://git.webconverger.org/?p=ikiwiki;h=refs/heads/html5) +* [ikiwiki instance with HTML5 templates](http://natalian.org) +* [HTML5 outliner tool](http://gsnedders.html5.org/outliner/) -- to check you have the structure of your markup correct + +> Kai, thanks enormously for working on this. I switched a page to +> the html5 doctype today, and was rather pleasently suprised that it +> validated, except for the new Cache-Control meta tag. Now I see you're +> well ahead of me. --[[Joey]] +> +> So, how should ikiwiki support html5? There are basically 3 approaches: +> +> 1. Allow users to add html5 tags to their existing xhtml pages. +> What has been done so far, can be extended. Basically works +> in browsers, if you don't care about standards. A good prerequisite +> for anything else, anyway. +> 2. Have both a html5 and a xhtml mode, allow user to select. +> 3. Switch to html5 in eg, ikiwiki 4; users have to deal with +> any custom markup on their pages/templates that breaks then. +> +> The second option seems fairly tractable from what I see here and in +> your branch. You made only relatively minor changes to 10 templates. +> It would probably not be too dreadful to put them in ifdefs. I've made a +> small start at doing that. +> +> I've made ikiwiki use the time element and all the new semantic elements +> in html5 mode. +> +> Other ideas: +> +> * Use details tag instead of the javascript in the toggle plugin. +> (Need to wait on browser support probably.) +> * Use figure and figcaption for captions in img. However, I have not +> managed to style it to look as good as the current table+caption +> approach. +> +> --[[Joey]] + +# htmlscrubber.pm needs to not scrub new HTML5 elements + +* [new elements](http://www.w3.org/TR/html5-diff/#new-elements) + +> Many added now. > -> This approach seems much more maintainable going foward than rolling a -> html 5 branch immediatly and trying to keep that continually up-to-date -> with mainline ikiwiki that is still using xhtml. --[[Joey]] +> Things I left out, too hard to understand today: +> Attributes contenteditable, +> data-\*, draggable, role, aria-\*. +> Tags command, keygen, output. +> +> Clearly unsafe: embed. +> +> Apparently cannot be used w/o javascript: menu. +> +> I have not added the new `ping` attribute, because parsing a +> space-separeated list of urls to avoid javascript injection is annoying, +> and the attribute seems generally dubious. +> --[[Joey]] + +# HTML5 Validation and t/html.t + +[validator.nu](http://validator.nu/) is the authorative HTML5 validator, +however it is almost impossible to sanely introduce as a build dependency +because of its insane Java requirements. :( I test locally via +[cURL](http://wiki.whatwg.org/wiki/IDE), though Debian packages cannot be built +with a network dependency. + +In the future, hopefully ikiwiki can test for valid HTML5 using [Relax NG +schema](http://syntax.whattf.org/) using a Debian package tool +[rnv](http://packages.qa.debian.org/r/rnv.html). + +> Validation in the test suite is nice, but I am willing to lose those +> tests for a while. --[[Joey]] + +# HTML5 migration issues + +# [article](http://www.whatwg.org/specs/web-apps/current-work/multipage/semantics.html#the-article-element) element + +This element is poorly supported by browsers. As a workaround, `style.css` needs: + + article { + display: block; + } + +Internet Explorer will display it as a block, though you can't seem to be able to further control the style. + +> done (needed for header too) --[[Joey]] + +## Time element -However as an [early adopter](http://en.wikipedia.org/wiki/Early_adopter) I would like to start using HTML5 as much as possible. The more pragmatic solution would be to use elements supported by the browsers of your readership I guess. I'm following other early adopters like [Anne](http://annevankesteren.nl/) for clues on how to proceed. +The [time element](http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-time-element) ideally needs the datatime= attribute set by a template variable with what [HTML5 defines as a valid datetime string](http://www.whatwg.org/specs/web-apps/current-work/multipage/infrastructure.html#valid-global-date-and-time-string). -* [Initial patch](http://git.webconverger.org/?p=ikiwiki;a=commit;h=2e2bb3f74f5000b1269142d6f9bdf1bcb4075ca4) +As a workaround: -> I can't figure out how to pull from this repository. ->> Sorry! I have fixed the cloneurl file to read `git clone git://webconverger.org/git/ikiwiki` + au:~% grep timeformat natalian.setup + timeformat => '%Y-%m-%d', -I'm unsure how to turn off the test validation by the very old [wdg-html-validator](http://packages.qa.debian.org/w/wdg-html-validator.html). So I have been unable to test my initial patches as I can't build ikiwiki. I would like to know how to edit the rules/Makefile to temporarily disable this. +> Also, the [[plugins/relativedate]] plugin needs to be updated to +> support relatatizing the contents of time elements. --[[Joey]] -> Don't run ¨make test" ... --[[Joey]] ->> I don't quite grok debhelper7 [rules](http://git.ikiwiki.info/?p=ikiwiki;a=blob;f=debian/rules). +> Done and done; in html5 mode it uses the time tag, and even +> adds pubdate when displaying ctimes. --[[Joey]] ->>> Well, ok :-) `rm t/html.t` or, add an empty `override_dh_auto_test` rule. ->>> --[[Joey]] +## tidy plugin -[validator.nu](http://validator.nu/) incidentally is **the** HTML5 validator, however it is almost impossible to sanely introduce as a build dependency because of its insane Java requirements. :( I test locally via [cURL](http://wiki.whatwg.org/wiki/IDE), though Debian packages cannot be built with a network dependency. +Will reformat html5 to html4. -# Notes +---- -* the [time element](http://www.whatwg.org/specs/web-apps/current-work/multipage/text-level-semantics.html#the-time-element) ideally needs the datatime= attribute set with iso8601 time -* I suspect the migration to the new semantic elements of HTML5 like article, header & footer to take some time, due to browser support. Though they sure make the template code look much nicer. -* `
` and too many `
`s usually indicates poor semantics. - > YMMV, but I tend to find that kind of concern counterproductive. - > --[[Joey]] -* Many of the header ``s should be proper [header elements](http://www.whatwg.org/specs/web-apps/current-work/multipage/semantics.html#the-h1,-h2,-h3,-h4,-h5,-and-h6-elements) - > See [[todo/Option_to_make_title_an_h1__63__]] for why not. --[[Joey]] +Ok, I consider this [[done]], at least as a first pass. Html5 mode +is experimental, but complete enough. --[[Joey]]