Fix routing to account for rawToContentPos#16497
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May 8, 2024
| @@ -1345,18 +1345,27 @@ def update(self): | |||
| self._brailleInputIndStart = None | |||
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| def getTextInfoForBraillePos(self, braillePos): | |||
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could you add type information here given the rewrite of this function?
seanbudd
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May 8, 2024
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I have noticed this behavior change: When selecting text with shift+down arrow in wordpad atleast in windows 10, review position moves to next line after last selected line (to first unselected line). This does not happen in notepad or in word 2019. Could this change have been introduced with this pr? |
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No. I think it's more likely a cause of the behavioral changes you introduced with the several prs of redundant handleUpdate calls. |
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They were reverted. It seems to be #16455. |
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Unfortunately in browse mode routing buttons seem to work inaccurately at least with firefox in windows 10:
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I'm going the revert route for now |
LeonarddeR
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May 13, 2024
This reverts commit 892f1e2.
seanbudd
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May 14, 2024
Reverts #16477 , #16497 Issues fixed None Issues reopened Reopens #10960 Reason for revert Feature turns out to be unstable. Can this PR be reimplemented? If so, what is required for the next attempt Use a feature flag Ensure issues reported in Fix routing to account for rawToContentPos #16497 (comment) and Fix routing to account for rawToContentPos #16497 (comment) are covered by the fix
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seanbudd
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Jul 30, 2024
Fixes #10960 Replaces #16477, #16497 Summary of the issue: There are cases where moving one character on a textInfo instance actually moves more than one unicode point offset. This is described by @mltony in the doc string for textInfos.TextInfo.moveToCodepointOffset. This causes of by one errors when cursor routing, since we're asking the textInfo to move by 1 characters, that might be presented by two or even more characters within the liblouis mapping. Description of user facing changes Cursor routing should be more reliable. Description of development approach @mltony's creation of moveToCodepointOffset allows us to move x code points from the start of the reading unit. As we're using 32 bit encoding for liblouis, every character as presented by liblouis is equal to one code point. Therefore we can safely assume that this method to move is much more reliable than the previous method.
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Link to issue number:
Fixup of #16477
Summary of the issue:
When writing #16477, I hadn't realized that
TextInfoRegioncompensated for characters that aren't part of the text info. This mapping is stored in the_rawToContentPosattribute. This compensation is necessary for character movement based routing, but not for code point offset based routing. The following would happen without this pr.1. HellomoveToCodepointOffset, moving to offset 0 means moving to1not toh. Basically, the cursor would end up at the first cell, not at the fourth.Description of user facing changes
Routing works again in Word list items.
Description of development approach
moveToCodepointOffset, move to the raw position, not to the actual content position.moveToCodepointOffsetexpects raw positions, not content positions.moveToCodepointOffsetwhen the content position is 0, since we can simply collapse the textInfo at the start of the reading unit and return that. Note thatmoveToCodepointOffsetwould fail for everything up to offset 3 anyway, since it wouldn't be able to move.Testing strategy:
Tested the steps to reproduce as mentioned above.
Known issues with pull request:
None known
Code Review Checklist: