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UIA end of text is defined as last visible line #8956

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opened 2026-01-31 01:42:21 +00:00 by claunia · 7 comments
claunia commented 2026-01-31 01:42:21 +00:00
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Originally created by @carlos-zamora on GitHub (Jun 10, 2020).

Environment

Windows build number: [run `[Environment]::OSVersion` for powershell, or `ver` for cmd]
Windows Terminal version (if applicable): master 9ce884c4

Any other software?

Steps to reproduce

This is in ConHost and Terminal.

  1. generate output (run dir then dir /?)
  2. using NVDA get the current line
  3. scroll up a few lines
  4. use NVDA to read the previous line
  5. repeat step 4 until you're on the last visible line
  6. use NVDA to read the next line

Expected behavior

Reads the next line.

Actual behavior

Refuses to read the next line because you are "at the bottom".

Originally created by @carlos-zamora on GitHub (Jun 10, 2020). # Environment ```none Windows build number: [run `[Environment]::OSVersion` for powershell, or `ver` for cmd] Windows Terminal version (if applicable): master 9ce884c4 Any other software? ``` # Steps to reproduce This is in ConHost and Terminal. 1. generate output (run `dir` then `dir /?`) 2. using NVDA get the current line 3. scroll up a few lines 4. use NVDA to read the previous line 5. repeat step 4 until you're on the last visible line 6. use NVDA to read the next line # Expected behavior Reads the next line. # Actual behavior Refuses to read the next line because you are "at the bottom".
claunia commented 2026-01-31 01:42:22 +00:00
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@DHowett commented on GitHub (Jun 11, 2020):

Moved from terminal 2.0 to 21H1 because it's a conhost bug.

@DHowett commented on GitHub (Jun 11, 2020): Moved from terminal 2.0 to 21H1 because it's a conhost bug.
claunia commented 2026-01-31 01:42:22 +00:00
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@carlos-zamora commented on GitHub (Jun 11, 2020):

Just tested this in Terminal. It repro's there too.

@carlos-zamora commented on GitHub (Jun 11, 2020): Just tested this in Terminal. It repro's there too.
claunia commented 2026-01-31 01:42:22 +00:00
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@codeofdusk commented on GitHub (Aug 15, 2020):

NVDA bounds UIA to the visible text. Otherwise we'd get thousands upon thousands of blank lines at the end of output.

@codeofdusk commented on GitHub (Aug 15, 2020): NVDA [bounds UIA to the visible text](https://github.com/nvaccess/nvda/blob/master/source/NVDAObjects/UIA/winConsoleUIA.py#L42). Otherwise we'd get thousands upon thousands of blank lines at the end of output.
claunia commented 2026-01-31 01:42:23 +00:00
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@DHowett commented on GitHub (Aug 15, 2020):

That’s helpful to know. Since the traditional console can have text that’s below the viewport (whereas terminal cannot), how does the user discover that there is additional content? Is it an uncommon-enough use case that it doesn’t matter much?

@DHowett commented on GitHub (Aug 15, 2020): That’s helpful to know. Since the traditional console can have text that’s below the viewport (whereas terminal cannot), how does the user discover that there is additional content? Is it an uncommon-enough use case that it doesn’t matter much?
claunia commented 2026-01-31 01:42:23 +00:00
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@codeofdusk commented on GitHub (Aug 15, 2020):

I've never run into this.

Would it be possible to remove the literally thousands of empty lines from UIA? It slows down our diffing algorithm and sometimes I can get lost in all the blanks! If so I could take out the visible range bounding...

@codeofdusk commented on GitHub (Aug 15, 2020): I've never run into this. Would it be possible to remove the literally thousands of empty lines from UIA? It slows down [our diffing algorithm](https://github.com/nvaccess/nvda/blob/master/source/NVDAObjects/behaviors.py#L324) and sometimes I can get lost in all the blanks! If so I could take out the visible range bounding...
claunia commented 2026-01-31 01:42:23 +00:00
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@codeofdusk commented on GitHub (Aug 15, 2020):

Maybe this is part of what's causing #5481? (in any case, if we don't have to bound to the visible ranges any more that issue would be mitigated).

@codeofdusk commented on GitHub (Aug 15, 2020): Maybe this is part of what's causing #5481? (in any case, if we don't have to bound to the visible ranges any more that issue would be mitigated).
claunia commented 2026-01-31 01:42:24 +00:00
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@carlos-zamora commented on GitHub (Sep 30, 2020):

I'm actually going to close this. This is specific to NVDA. Narrator, Inspect.exe, and Accessibility Insights don't do this. This is just NVDA bounding UIA to the visible text to improve performance.

@carlos-zamora commented on GitHub (Sep 30, 2020): I'm actually going to close this. This is specific to NVDA. Narrator, Inspect.exe, and Accessibility Insights don't do this. This is just NVDA bounding UIA to the visible text to improve performance.
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Reference: starred/terminal#8956
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