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[PR #8577] Fix color selection operations in conhost #27239

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opened 2026-01-31 09:20:49 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:20:49 +00:00
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Original Pull Request: https://github.com/microsoft/terminal/pull/8577

State: closed
Merged: Yes

In conhost there is a keyboard shortcut that applies colors to the
selected range of text, and another shortcut that searches for the
selected text, and applies colors to any matching content. The former
operation doesn't work correctly when the selection is wrapped, and both
have problems when the selected text spans DBCS characters. This PR
attempts to fix those issues.

The problem with the color section was that it applied the color to a
simple rect spanning the start and end points of the selection. I've now
updated it to use the Selection::GetSelectionRects method, which
correctly handles a wrapped range of lines, and makes sure that double
width characters are fully covered.

The problem with the "find-and-color" operation was in the way it
obtained the search text from the selected screen cells. Since it
retrieved one cell at a time, and a DBCS character can span two cells,
that resulted in some characters being repeated in the search text. I've
now corrected that code to take the width of the characters into
account.

Validation Steps Performed

I've manually verified that the test cases described in #8572 and #8574
are now working correctly.

Closes #8572
Closes #8574

**Original Pull Request:** https://github.com/microsoft/terminal/pull/8577 **State:** closed **Merged:** Yes --- In conhost there is a keyboard shortcut that applies colors to the selected range of text, and another shortcut that searches for the selected text, and applies colors to any matching content. The former operation doesn't work correctly when the selection is wrapped, and both have problems when the selected text spans DBCS characters. This PR attempts to fix those issues. The problem with the color section was that it applied the color to a simple rect spanning the start and end points of the selection. I've now updated it to use the `Selection::GetSelectionRects` method, which correctly handles a wrapped range of lines, and makes sure that double width characters are fully covered. The problem with the "find-and-color" operation was in the way it obtained the search text from the selected screen cells. Since it retrieved one cell at a time, and a DBCS character can span two cells, that resulted in some characters being repeated in the search text. I've now corrected that code to take the width of the characters into account. ## Validation Steps Performed I've manually verified that the test cases described in #8572 and #8574 are now working correctly. Closes #8572 Closes #8574
claunia added the pull-request label 2026-01-31 09:20:49 +00:00
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Reference: starred/terminal#27239
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