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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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33
layout/reftests/css-ruby/utils.js Normal file
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function getBlockAxisName(elem) {
var wm = getComputedStyle(elem).writingMode;
return (!wm || wm == 'horizontal-tb') ? 'height' : 'width';
}
function getBSize(elem) {
return elem.getBoundingClientRect()[getBlockAxisName(elem)] + 'px';
}
function setBSize(elem, bsize) {
elem.style[getBlockAxisName(elem)] = bsize;
elem.style.lineHeight = bsize;
}
// Ruby annotations are placed based on block-axis size of inline boxes
// instead of line box. Block-axis size of an inline box is the max
// height of the font, while that of line box is line height. Hence we
// sometimes need to explicitly set the block-axis size of an inline
// box to a block to simulate the exact behavior, which is what the
// following two functions do.
function makeBSizeMatchInlineBox(block, inline) {
setBSize(block, getBSize(inline));
}
function makeBSizeOfParentMatch(elems) {
// The size change is divided into two phases to avoid
// triggering reflow for every element.
for (var elem of elems)
elem.dataset.bsize = getBSize(elem);
for (var elem of elems)
setBSize(elem.parentNode, elem.dataset.bsize);
}