starred/terminal
1
0
Fork 0
mirror of https://github.com/microsoft/terminal.git synced 2026-02-03 21:25:34 +00:00
Code Issues 19.0k Packages Projects Releases 20 Wiki Activity

[PR #5081] Fix the Alternate Scroll Mode when DECCKM enabled #26097

New Issue
Open
opened 2026-01-31 09:13:54 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 09:13:54 +00:00
Owner
Copy Link

Original Pull Request: https://github.com/microsoft/terminal/pull/5081

State: closed
Merged: Yes

Summary of the Pull Request

If the Alternate Scroll Mode is enabled, the terminal generates up/down keystrokes when the mouse wheel is scrolled. However, the expected escape sequences for those keys are dependent on the state of the Cursor Keys Mode ( DECCKM), but we haven't taken that into account. This PR updates the alternate scroll implementation to make sure the appropriate sequences are sent for both DECCKM modes.

References

#3321

PR Checklist

  • Closes #xxx
  • CLA signed. If not, go over here and sign the CLA
  • Tests added/passed
  • Requires documentation to be updated
  • I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

Detailed Description of the Pull Request / Additional comments

I've simply added a condition in the TerminalInput::_SendAlternateScroll method to send a different pair of sequences dependent on the state of _cursorApplicationMode flag.

Validation Steps Performed

Manually tested in VIM (although that required me enabling the Alternate Scroll Mode myself first). Also added a new unit test in MouseInputTest to confirm the correct sequences were generated for both DECCKM modes.

**Original Pull Request:** https://github.com/microsoft/terminal/pull/5081 **State:** closed **Merged:** Yes --- ## Summary of the Pull Request If the _Alternate Scroll Mode_ is enabled, the terminal generates up/down keystrokes when the mouse wheel is scrolled. However, the expected escape sequences for those keys are dependent on the state of the _Cursor Keys Mode_ ( `DECCKM`), but we haven't taken that into account. This PR updates the alternate scroll implementation to make sure the appropriate sequences are sent for both `DECCKM` modes. ## References #3321 ## PR Checklist * [ ] Closes #xxx * [x] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA * [x] Tests added/passed * [ ] Requires documentation to be updated * [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx ## Detailed Description of the Pull Request / Additional comments I've simply added a condition in the `TerminalInput::_SendAlternateScroll` method to send a different pair of sequences dependent on the state of `_cursorApplicationMode` flag. ## Validation Steps Performed Manually tested in VIM (although that required me enabling the _Alternate Scroll Mode_ myself first). Also added a new unit test in `MouseInputTest` to confirm the correct sequences were generated for both `DECCKM` modes.
claunia added the pull-request label 2026-01-31 09:13:54 +00:00
Sign in to join this conversation.
No Branch/Tag Specified
Branches Tags
Labels
Clear labels
⛺ Reserved
A11yCO
A11yMAS
A11ySev1
A11ySev2
A11ySev3
A11yTTValidated
A11yUsable
A11yVoiceAccess
A11yWCAG
Area-Accessibility
Area-AtlasEngine
Area-AzureShell
Area-Build
Area-Build
Area-Chat
Area-CmdPal
Area-CodeHealth
Area-Commandline
Area-CookedRead
Area-DefApp
Area-Extensibility
Area-Fonts
Area-GroupPolicy
Area-i18n
Area-Input
Area-Interaction
Area-Interop
Area-Localization
Area-Output
Area-Performance
Area-Portable
Area-Quality
Area-Remoting
Area-Rendering
Area-Schema
Area-Server
Area-Settings
Area-SettingsUI
Area-ShellExtension
Area-ShellExtension
Area-ShellExtension
Area-Suggestions
Area-Suggestions
Area-TerminalConnection
Area-TerminalControl
Area-Theming
Area-UserInterface
Area-VT
Area-Windowing
Area-WPFControl
AutoMerge
Blocking-Ingestion
Culprit-Centennial
Culprit-WinUI
Disability-All
Disability-Blind
Disability-LowVision
Disability-Mobility
External-Blocked-WinUI3
Fixed
Gathering-Data
good first issue
HCL-E+D
HCL-WindowsTerminal
Help Wanted
Impact-Compatibility
Impact-Compliance
Impact-Correctness
Impact-Visual
In-PR
InclusionBacklog
InclusionBacklog-Windows TerminalWin32
InclusionCommitted-202206
Issue-Bug
Issue-Docs
Issue-Feature
Issue-Feature
Issue-Question
Issue-Samples
Issue-Scenario
Issue-Task
Needs-Attention
Needs-Author-Feedback
Needs-Bisect
Needs-Discussion
Needs-Repro
Needs-Tag-Fix
Needs-Tag-Fix
Needs-Triage
No-Recent-Activity
Priority-0
Priority-1
Priority-2
Priority-3
Product-Cmd.exe
Product-Colortool
Product-Colortool
Product-Colortool
Product-Conhost
Product-Conpty
Product-Meta
Product-Powershell
Product-Terminal
Product-WSL
pull-request
Mirrored from GitHub Pull Request
 Resolution-Answered
Resolution-By-Design
Resolution-Duplicate
Resolution-External
Resolution-Fix-Available
Resolution-Fix-Committed
Resolution-No-Repro
Resolution-Won't-Fix
Severity-Blocking
Severity-Crash
Severity-DataLoss
spam
this-will-be-a-breaking-change
Tracking-External
WindowsTerminal_Win32
Work-Item
zAskModeBug
zInbox-Bug
No Label pull-request
Milestone
No items
No Milestone
Projects
Clear projects
No project
Assignees
Clear assignees
claunia
No Assignees
1 Participants
Notifications
Due Date
No due date set.
Dependencies

No dependencies set.

Reference: starred/terminal#26097
Delete Branch "%!s()"

Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?