wrong caret position on moving left with inlined decoration

[Alexander Gusakov (agusakow)]

Does this issue occur when all extensions are disabled?: Yes

• Monaco Version: 0.31.0, Code OSS Dev: 1.63.0

• OS Version: 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/97.0.4692.20 Safari/537.36'

Steps to Reproduce:

1. Open https://microsoft.github.io/monaco-editor/playground.html
2. Paste code

var editor = monaco.editor.create(document.getElementById('container'), {
	value: "function hello() {\n\talert('Hello world!');\n}",
	language: 'javascript'
});

editor.getModel().deltaDecorations([], [{
        range: {
		startLineNumber: 1,
		endLineNumber: 1,
		startColumn: 1 << 30,
		endColumn: 1 << 30
	},
	options: {
		after: {
			content: "Inlined text",
			inlineClassNameAffectsLetterSpacing: true,
		},
		showIfCollapsed: true
	}
}]);

3. Paste cursor at the beginning of 2 line
4. Press left

Actual cursor position is :

function hello() {Inlined text|
	alert('Hello world!');
}

Expected:

function hello() {|Inlined text
	alert('Hello world!');
}

[Alexandru Dima (alexdima)]

This is the current behavior of inserted text, it creates two distinct view cursor stops (one before the inserted text and one after the inserted text). You can discover the two distinct view cursor stops by clicking with the mouse. Both view cursor stops map to the same model cursor position, therefore we have decided to skip one when moving left/right. When moving left, we stop at the second one and skip the first one. When moving right, we stop at the first one and skip the second one. IMHO we could add more API such that this can be made configurable by the creator of the inserted text.

cc Henning Dieterichs (@hediet)

[Alexander Gusakov (agusakow)]

Thank you for your explanations!
I'm trying to implement something like inline variable values at VsCode debugger with this injected text API.

This is behavior from VsCode Version: 1.62.3:

And this is from Code OSS Dev: 1.63.0:

Am I right that the latest version use injected text API and this is the intended behavior?

[Gokhan Kurt (gkurt)]

Did you find a solution to this? It seems wrong to me and should be fixed imho.

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