After some more thoughts, I thought this conversation clarified my feeling of wrongness, so I added a section to explain that.
https://drafts.csswg.org/css-rhythm/#eastasia Hope this makes better understanding for this CJK feature. On Mon, Apr 3, 2017 at 2:39 AM, Koji Ishii <ko...@chromium.org> wrote: > Hi Jet, thank you for cc'ing me. > > I'm having difficulty to convince authors to use features when it's behind > the flag, so it's a bit circling. But we found some sites are, logically > speaking, implementable only with line-height-step, and their biggest wish > is interoperability, because supporting down-level browsers is troublesome. > That being another reason to make convincing sites difficult, with or > without flag. > > One such example is <http://sato-yuki.net/>. The site owner had to > develop SASS plugin because Compass <http://compass-style.org/ > reference/compass/typography/vertical_rhythm/> doesn't provide vertical > rhythm for vertical flow, but we confirmed that this site is fully > implementable by line-height-step. I've got several other cases from Japan > digital-publishing industry but they're not available on public internet > unfortunately, so they don't suffice your request. They're not really using > the behind-the-flag feature, but could they be examples? > > cc'ed a few more people, who presented the needs of vertical rhythm in > Sapporo industry meetup a few years ago, and as far as I understand, they > will be presenting vertical rhythm again in Tokyo meetup. I hope they can > present more cases. > > Just in case my words in the past were misleading, I do agree with > usefulness of line grid and box height stepping. They complement > line-height-step, covers cases where line-height-step doesn't, or make it > more robust. I do agree, depends on use cases, especially in Latin, they're > more useful than line-height-step. > > If Gecko is going to work on all 3 features -- line grid, box step, and > line step -- this is super great. We wish to revisit them in future too. > But other features having useful cases doesn't look like a reason not to > work on line height step to me, when line-height-step complements line grid > and box stepping (and vice-versa of course,) and CJK has been strongly > demanding vertical rhythm for more than a decade even the simplest one. > We're going to try to make CJK happy first, then try to spread to other > authors, but other engines can take different orders, or make all of them > happy at once. It's just great. > > > On Sun, Apr 2, 2017 at 12:42 AM, Jet Villegas <jville...@mozilla.com> > wrote: > >> During recent discussions with Koji Iishi, we said we would consider >> this feature for implementation if we could find examples of content >> authored for this feature that satisfy use cases from web and/or print >> designers. I'd still love to see those examples ( authored by someone >> outside the working group) before we commit to an implementation. In >> other words, we said we'd do it if it was relatively straightforward >> to implement *and* web authors outside the CSSWG has used the >> experimental Chromium feature and is happy with the rendering. >> >> Koji: have you found such examples? >> >> Thanks, >> >> --Jet >> >> >> On Thu, Mar 30, 2017 at 9:11 PM, Tommy Kuo <to...@mozilla.com> wrote: >> > **Summary** >> > >> > I am intent to implement the property `line-height-step`. And it would >> be disabled behind the pref `layout.css.line-height-step.enabled` by >> default. It is a property to make authors create the content with vertical >> rhythm easier. >> > >> > **Link to standard** >> > >> > CSS Rhythmic Sizing >> > <https://drafts.csswg.org/css-rhythm/> >> > >> > >> > **Bug Link** >> > >> > Bug 1343819 - Implement CSS property `line-height-step` >> > <https://bugzilla.mozilla.org/show_bug.cgi?id=1343819> >> > >> > **Tests** >> > >> > There are already some test cases on web-platform-tests. >> > <https://github.com/w3c/web-platform-tests/tree/master/css/css-rhythm-1 >> > >> > >> > **Status on Other Browsers** >> > >> > *Blink* >> > >> > Blink is implemented in Issue 2704343003. >> > <https://codereview.chromium.org/2704343003> >> > >> > Currently, this property only available in Chromium Developer Build 59. >> To try this feature, you need to enable "Experimental Web Platform >> features" in chrome://flags. >> > >> > *WebKit & Edge* >> > >> > Not support. >> > >> > **More About It** >> > >> > Vertical rhythm is a principle of typography. It is about spacing text. >> More generally, it is about vertical stacked elements. We can create a more >> comfortable layout with vertical rhythm. >> > >> > We can imagine that we're put all elements on a sheet of lined paper. >> The sizes of elements are according to the size between the lines. >> > >> > For example, we set the font-size as 12px. And the line-height is 1.5x >> of font-size, so it is 18px. We assume we want to put all elements on a >> lined paper and the line size is 18px. For the normal text, we just put >> them align the lines. If there is a title with 24px, to follow the vertical >> rhythm, the size of the title should be multiple of the line size. We add >> 6px to both over-side and under-side of the title, and the size of the >> title would be 36px (2 * 18). >> > >> > >> > - Tommy >> > >> > _______________________________________________ >> > dev-platform mailing list >> > dev-platform@lists.mozilla.org >> > https://lists.mozilla.org/listinfo/dev-platform >> > > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
