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Platform/Features/Vertical text: Difference between revisions
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|Feature overview=Add support for vertical text layout. | |Feature overview=Add support for vertical text layout. | ||
Many scripts can be laid out vertically or horizontally (e.g. Japanese) and some can only be laid out vertically (e.g. classical Mongolian). For those that can be laid out either vertically or horizontally, vertical layout is sometimes | Many scripts can be laid out vertically or horizontally (e.g. Japanese) and some can only be laid out vertically (e.g. classical Mongolian). For those that can be laid out either vertically or horizontally, vertical layout is sometimes preferable (e.g. Japanese novels are typically laid out vertically). | ||
|Feature users and use cases=Users: publishers of vertically typeset content (e-publishing organisations, independent web authors, especially in East Asia) | |Feature users and use cases=Users: publishers of vertically typeset content (e-publishing organisations, independent web authors, especially in East Asia) | ||
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* Web-based e-readers for Japanese novels (especially on mobile devices) | * Web-based e-readers for Japanese novels (especially on mobile devices) | ||
* Web pages that use classical Mongolian script | * Web pages that use classical Mongolian script | ||
|Feature requirements=* Support vertical text for whole documents (i.e. initial containing block uses a vertical writing mode) and document fragments (i.e. orthogonal flows) | |Feature requirements=* Support vertical text for whole documents (i.e. initial containing block uses a vertical writing mode) and document fragments (i.e. orthogonal flows) | ||
* Support both top-to-bottom, right-to-left (e.g. CJK) and top-to-bottom, left-to-right (e.g. Mongolian) writing modes. | * Support both top-to-bottom, right-to-left (e.g. CJK) and top-to-bottom, left-to-right (e.g. Mongolian) writing modes. | ||
* As far as possible (particularly given that the spec is in flux), conform to the relevant parts of [http://dev.w3.org/csswg/css3-writing-modes/ CSS3 Writing Modes specification]—most likely the <code>writing-mode</code> and <code>text-orientation</code> properties. | * As far as possible (particularly given that the spec is in flux), conform to the relevant parts of [http://dev.w3.org/csswg/css3-writing-modes/ CSS3 Writing Modes specification]—most likely the <code>writing-mode</code> and <code>text-orientation</code> properties. | ||
|Feature non-goals=* Support ''all'' of the [http://dev.w3.org/csswg/css3-writing-modes/ CSS Writing Modes specification] | |Feature non-goals=* Support ''all'' of the [http://dev.w3.org/csswg/css3-writing-modes/ CSS Writing Modes specification] | ||
** | ** For example, properties such as <code>unicode-bidi</code>, <code>text-combine-horizontal</code>, and <code>text-combine-mode</code> are probably outside the scope of this feature | ||
* Support | * Support [https://bugzilla.mozilla.org/show_bug.cgi?id=33339 HTML ruby] | ||
* Support | * Support vertical text in SVG | ||
|Feature implementation plan=Some ''very rough'' ideas of ''some'' of the work items (this is likely to be '''very''' wrong): | |Feature implementation plan=Some ''very rough'' ideas of ''some'' of the work items (this is likely to be '''very''' wrong): | ||
* Parsing of <code>writing-mode</code> and <code>text-orientation</code> | * Parsing of <code>writing-mode</code> and <code>text-orientation</code> | ||
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* Vertical form controls?? | * Vertical form controls?? | ||
* Tables | * Tables | ||
* ( | * (Probably lots of other HTML elements that require special handling? e.g. list markers. Presumably images don't rotate (i.e. width/height are physical) but form controls do?) | ||
* Pagination? | * Pagination? | ||
* Glyph orientation | * Glyph orientation | ||