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e025088065
Add documentation for CodeMirror extensions GitOrigin-RevId: e5f07084173f201919272f9d46dcdaef4b817874
35 lines
953 B
TypeScript
35 lines
953 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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/**
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* Custom keymap for Windows and Linux for scrolling the viewport up/down one line with Ctrl+ArrowUp/Down.
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*/
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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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