commit | 639988bdba6e05609beacc23fc66c18f12a01ac6 | [log] [tgz] |
---|---|---|
author | Frédéric Wang <fwang@igalia.com> | Sat Jul 24 02:42:56 2021 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Sat Jul 24 02:54:04 2021 |
tree | a097d48b101af3a25df0febf673e437fceccc151 | |
parent | dd546eec99ff458c6afb1ffae277a59f871944ba [diff] |
Implement vertical stretchy operators This is the first patch of a series of CL to implement MathML stretchy operators. It only implements basic support for stretching operators along the block axis (e.g. fences). This corresponds to the following text in the spec with a few adjustments: 1. "Otherwise, the stretch axis of the operator is block." from [1], but without symmetric/minsize/maxsize from steps 4 and 5. Additionally, due to current limitations in LayoutNG, one cannot implement "The inline size of the content is the width of the stretchy glyph" from step 6. Instead the approximate min/max size from step 2 is used during layout, which can lead to excessive gaps around vertical stretchy operators. 2. Inserting [2] in the algorithm of the mrow layout [3]. However, embellished operators [4] are not implemented yet. Instead, they are just treated to be equivalent to an <mo> element. Additionally, step 1. is skipped for now since it only makes sense when the element using the mrow layout is itself an embellished operator. [1] https://w3c.github.io/mathml-core/#layout-of-operators [2] https://w3c.github.io/mathml-core/#algorithm-for-stretching-operators-along-the-block-axis [3] https://w3c.github.io/mathml-core/#layout-of-mrow [4] https://w3c.github.io/mathml-core/#dfn-embellished-operator Bug: 6606, 1124301 Change-Id: If32c7c3e0177e78e273a2328c151c2b899e3acd1 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3013775 Commit-Queue: Frédéric Wang <fwang@igalia.com> Reviewed-by: Ian Kilpatrick <ikilpatrick@chromium.org> Cr-Commit-Position: refs/heads/master@{#904997}
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