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33 lines
875 B
TypeScript
33 lines
875 B
TypeScript
import { Command, EditorView } from '@codemirror/view'
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function scrollByLine(view: EditorView, lineCount: number) {
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view.scrollDOM.scrollTop += view.defaultLineHeight * lineCount
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}
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const scrollUpOneLine: Command = (view: EditorView) => {
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scrollByLine(view, -1)
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// Always consume the keypress to prevent the cursor going up a line when the
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// editor is scrolled to the top
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return true
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}
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const scrollDownOneLine: Command = (view: EditorView) => {
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scrollByLine(view, 1)
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// Always consume the keypress to prevent the cursor going down a line when
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// the editor is scrolled to the bottom
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return true
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}
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// Applied to Windows and Linux only
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export const scrollOneLineKeymap = [
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{
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linux: 'Ctrl-ArrowUp',
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win: 'Ctrl-ArrowUp',
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run: scrollUpOneLine,
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},
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{
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linux: 'Ctrl-ArrowDown',
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win: 'Ctrl-ArrowDown',
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run: scrollDownOneLine,
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},
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]
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