Ting-Yu Lin 977a6275d1 Bug 1582224 - Split SIDEWAYS bit in WritingMode. r=jfkthame,emilio ... Currently, there's no way to tell whether the SIDEWAYS bit is set from `writing-mode:sideways-*` or `writing-mode:vertical-*; text-orientation:sideways;`. To be able to tell them apart, split SIDEWAYS bits into VERTICAL_SIDEWAYS and TEXT_SIDEWAYS. This is needed by my proposed solution in bug 1102175. Also, provide convenience methods related to sideways writing-mode, and replace obscure checks in the codebase. Note that we don't have the use cases to distinguish vertical-rl from sideways-rl in layout, but for the completeness, IsSidewaysLR() is still defined. Differential Revision: https://phabricator.services.mozilla.com/D46321 --HG-- extra : moz-landing-system : lando		2019-09-19 02:37:14 +00:00
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style	Bug 1582224 - Split SIDEWAYS bit in WritingMode. r=jfkthame,emilio	2019-09-19 02:37:14 +00:00