Extensions: onDidChangeActiveTextEditor raised with undefined event argument - Githubissues

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Extensions: onDidChangeActiveTextEditor raised with undefined event argument #27100

Closed pprice closed 7 years ago

pprice commented 7 years ago

VSCode Version: master as of 94c647f246c3e0a98f2234a1c2614415a6420736
OS Version: OSX 10.11.6

Steps to Reproduce:

Create an extension that listens to vscode.window.onDidChangeActiveTextEditor
Open a large file (e.g. http://seanlahman.com/files/database/baseballdatabank-2017.1.zip Fielding.csv)
Toggle between two files (one being the large file)

Expected: onDidChangeActiveTextEditor should be raised the active vscode.TextEditor instance.

Actual: onDidChangeActiveTextEditor is raised with undefined

Notes: Some other observations:

onDidOpenTextDocument is raised
vscode.window.visibleTextEditorsis expected to have a length of 1 (one open visible document) but has a length of 0

jrieken commented 7 years ago

For performance reasons we don't synchronise file that are over 5MB in size. Therefore no editor and document is created in the extension host. We do this to keep the extension host responsive.