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go.*,text: implement shaper-driven line truncation

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This commit pushes limiting the maximum number of lines of text into
the shaper implementation. This is more efficient than doing it in
widgets, and also opens the door for future use of the shaper to
insert ellipsis and other truncating characters as appropriate.

I realized that we lost the implementation of limiting the number of
lines of text in my text stack overhaul, so this fixes a regression
from that work.

Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>
This commit is contained in:
Chris Waldon
2022-12-14 11:11:25 -05:00
committed by Elias Naur
parent 719278bb36
commit 2db1a7bfb9
6 changed files with 51 additions and 11 deletions
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text/gotext_test.go
+2 -2
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@@ -193,8 +193,8 @@ func makeTestText(shaper *shaperImpl, primaryDir system.TextDirection, fontSize,
rtlSource = string(complexRunes[:runeLimit])
}
}
simpleText := shaper.shapeAndWrapText(shaper.orderer.sortedFacesForStyle(Font{}), fixed.I(fontSize), lineWidth, locale, []rune(simpleSource))
complexText := shaper.shapeAndWrapText(shaper.orderer.sortedFacesForStyle(Font{}), fixed.I(fontSize), lineWidth, locale, []rune(complexSource))
simpleText := shaper.shapeAndWrapText(shaper.orderer.sortedFacesForStyle(Font{}), Parameters{PxPerEm: fixed.I(fontSize)}, lineWidth, locale, []rune(simpleSource))
complexText := shaper.shapeAndWrapText(shaper.orderer.sortedFacesForStyle(Font{}), Parameters{PxPerEm: fixed.I(fontSize)}, lineWidth, locale, []rune(complexSource))
shaper = testShaper(rtlFace, ltrFace)
return simpleText, complexText
}