X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/219e7e29a49a55a02e5ec6213a41aa82afdad5a0..ea753782b222bf4ba2fb4683b6363afdd9055b64:/doc/todo/pedigree_plugin.mdwn diff --git a/doc/todo/pedigree_plugin.mdwn b/doc/todo/pedigree_plugin.mdwn index 2ff9487f1..1977c3d4d 100644 --- a/doc/todo/pedigree_plugin.mdwn +++ b/doc/todo/pedigree_plugin.mdwn @@ -21,10 +21,174 @@ examples) are in the 'pedigree' Git branch in this repo: Seems there is also a [gitweb](http://repo.or.cz/w/ikiwiki/intrigeri.git). +> Ok, I'll take a look. BTW, could you allow user joey on repo.or.cz +> push access to the main ikiwiki repo you set up there? --[[Joey]] + +>> I did not. The main ikiwiki repo on repo.or.cz seems to have been +>> been setup by johannes.schindelin@gmx.de ; mine is what they call +>> a "fork" (but it's not, obviously). -- intrigeri + Any opinions on the idea/design/implementation? -What needs to be changed so that it's possible to include it in -mainline ikiwiki? +> Seems that there should be a more generic way to do `PEDIGREE_BUT_ROOT` +> and `PEDIGREE_BUT_TWO_OLDEST` (also `is_second_ancestor`, +> `is_grand_mother` etc). One way would be to include in `PEDIGREE` +> a set of values like `depth_1`, `depth_2`, etc. The one corresponding +> to the `absdepth` would be true. This would allow a template like this: + + + + + + + /* only showing pages 2 levels deep */ + + + + +> The only missing information would be `reldepth`, but in the above +> example the author of that template knows that it's `absdepth - 1` +> (Things would be a lot nicer if `HTML::Template` had equality tests!) +> +> Since this would make it more generic and also fix your one documented +> bug, I can see no reason not to do it. ;-) --[[Joey]] + +>> Thanks for your comments. I'll answer soon. (Grrr, I really +>> need to find a way to edit this wiki offline, every minute +>> online costs bucks to me, my old modem gently weeps, +>> and I hate webbrowsers.) -- intrigeri + +>>> Well, I maybe didn't get your idea properly; I may be missing +>>> something obvious, but: + +>>> * I don't understand how this would replace `is_grand_mother`. As a template +>>> writer, I don't know, given an absolute array index (and this is the only +>>> piece of data your solution gives me), if it will be e.g. the before-last +>>> (how do I say this in correct English?) element of an array whose +>>> (variable) size is unknown to me. +>>> * Knowing that `reldepth`'s value is, in a given loop, always equal to +>>> `absdepth - 1` is of little use to me (as a template writer): how do I use +>>> this piece of information programmatically in my templates, if I want all +>>> links with `reldepth==2` to be given the same style? I guess some bits of +>>> Javascript might do the trick, but if it's getting so complicated, I'll +>>> just style my parentlinks another way. + +>>>> Perhaps I misunderstood what `is_grand_mother` is supposed to do. The +>>>> docs were not very clear to me. If it's supposed to be 2 down from +>>>> the page, (and not from the root), this could be achieved by reversing +>>>> the `depth_n` variables. So the page gets `depth_1` set, its parent gets +>>>> `depth_2` set, etc. If you want to be able to include/exclude +>>>> from both ends, you could also have a `height_n` that is 1 for the +>>>> root, and counts upwards. --[[Joey]] + +>>> In my understanding, your suggestion gives us little more than can already +>>> be achieved anyway with `HTML::Template`'s `loop_context_vars` (i.e. +>>> `__first__`, `__last__` and `__counter__`). The only added bonus is doing +>>> custom stuff for an arbitrary element in the loop, chosen by its absolute +>>> depth. Please correct me if needed. + +>>> (Intermezzo: in the meantime, to suit my personal real-world needs, I added +>>> a `DISTANCE` loop-variable. Quoting the documentation, it's "thedistance, +>>> expressed in path elements, from the current page to the current path +>>> element; e.g. this is 1 for the current page's mother, 2 for its +>>> grand-mother, etc.".) + +>>> Anyway, your comments have made me think of other ways to simplify a bit +>>> this plugin, which admittedly provides too much overlapping functionality. +>>> Bellow is my reasoning. + +>>> In one of my own real world examples, my two main use cases are : + +>>> * the "full-blown example" provided in the documentation (i.e. +>>> displaying every parent but mother and grand'ma as a group, and giving +>>> every of these two last ones their dedicated div); +>>> * skipping the two oldest parents, and inside what's left, displaying the +>>> three youngest parents (i.e. mother, grand'ma and grand'grand'ma), each +>>> one with a dedicated style; + +>>> Both of these can be achieved by combining `PEDIGREE`, `DISTANCE`, and some +>>> CSS tricks to hide some parts of the list. `IS_MOTHER` and +>>> `IS_GRAND_MOTHER`, as well as `PEDIGREE_BUT_TWO_OLDEST`, would be convenient +>>> shortcuts, but I do not formally need them. + +>>> So... it seems things can be simplified greatly: + +>>> * I initially added `RELDEPTH` for completeness, but I'm not sure anyone +>>> would use it. Let's give it up. +>>> * Once `RELDEPTH` is lost (modulo Git tendencies to preserve history), the +>>> known bug is gone as well, and `PEDIGREE_BUT_ROOT` and +>>> `PEDIGREE_BUT_TWO_OLDEST` are now only convenient shortcuts functions; +>>> they could as well disappear, if you prefer to. + +>>> It appears then that I'd be personally happy with the single `PEDIGREE` loop +>>> (renamed to `PARENTLINKS`), providing only `PAGE`, `URL`, `ABSDEPTH` (maybe +>>> renamed to `DEPTH`), and `DISTANCE`. This would make my templates a bit more +>>> complicated to write and read, but would also keep the plugin's code to the +>>> bare minimum. Let's say it is my up-to-date proposal. (Well, if the various +>>> shortcuts don't really annoy you, I'd be glad to keep them ;) + +>>>> This sounds fairly similar to what I just described above. (I called +>>>> DISTANCE "height".) I don't know about the CSS tricks; seems like if +>>>> `DEPTH_n` and `DISTANCE_n` are provided, you can test for them inside +>>>> the loop using HTML::Template's lame testing, and isolate any page or +>>>> range of pages. --[[Joey]] + +>>>>> Ok, I definitely like this idea, as an effective and generic +>>>>> page-range selection tool; this seems the way to go to me. + +>>>>> But if you discard the `DEPTH` and `HEIGHT` +>>>>> counters, we lack a way to **style**, for example, every parent link +>>>>> depending on its depth or height; one can do this for arbitrary +>>>>> parents (chosen by their height or depth), but *not* for *any* parent, +>>>>> since there is no way to express, with HTML::Template, something like +>>>>> "display the name of the only `DEPTH_n` variable that is currently +>>>>> true". So I am in favor of keeping the `DEPTH` and `HEIGHT` counters, +>>>>> to allow constructs like: + + + " class="parentdistance"> + + / + + +>>>>> This seems to me a nice functionality bonus, and should not +>>>>> imply too bloated code. I'm thus going to rewrite the plugin +>>>>> with only `PEDIGREE`, `DEPTH`, `HEIGHT`, `DEPTH_n` and +>>>>> `HEIGHT_n`. -- intrigeri + +>>>>>> Done, and pushed in my pedigree branch. Update: I've also done and +>>>>>> pushed two commits that rename the plugin and replace +>>>>>> the core parentlinks with this one. --[[intrigeri]] (I'll try never to rebase this branch, but writing this plugin has been a pretext for me to start learning Git, so...) + +To finish with, it seems no plugin bundled with ikiwiki uses the current +parentlinks implementation, so one could event think of moving it from the +core to this plugin (which should then be enabled by default, since the +default templates do use parentlinks ;). + +> I think that moving parentlinks out to a plugin is a good idea. +> However, if it's done, I think the plugin should be named parentlinks, +> and should continue to use the same template variables as are used now, +> to avoid needing to change custom templates. Pedigree is a quite nice +> name, but renaming it to parentlinks seems to be the way to go to me. +> --[[Joey]] + +>> Agreed. -- intrigeri + +>> Just commited a testsuite for this plugin, BTW. It's nearly twice +>> big as the plugin itself, I'm wondering... -- intrigeri + +Merged, nice work. (Overkill having a test suite. ;-) --[[Joey]] + +> Thanks. If the testsuite reveals itself to be harder to maintain than +> the plugin, my ego won't be offended to see it removed. It's been +> nice to find a way, step by step, to work with you on this small +> plugin thing. I'm starting to feel a bit at home in ikiwiki +> sourcetree, which is great since I may have to start working on some +> more ambitious ikiwiki stuff, such as the ~multilingual wiki +> (master language + translations) support. Expect news from me on +> this front in the next weeks. --[[intrigeri]] + +[[!tag patch done]]