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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| import type { Line } from '@codemirror/state'; | ||
| import type { DecorationSet, ViewUpdate } from '@codemirror/view'; | ||
| import { Decoration, EditorView, ViewPlugin, WidgetType } from '@codemirror/view'; | ||
|
|
||
| class NewlineWidget extends WidgetType { | ||
| line: Line; | ||
| markerSymbol: string; | ||
|
|
||
| constructor({ line, markerSymbol = '↵' }: { line: Line; markerSymbol?: string }) { | ||
| super(); | ||
| this.line = line; | ||
| this.markerSymbol = markerSymbol; | ||
| } | ||
|
|
||
| toDOM() { | ||
| const span = document.createElement('span'); | ||
|
|
||
| span.textContent = this.markerSymbol; | ||
|
|
||
| span.className = 'cm-newline'; | ||
|
|
||
| if (this.line.length === 0) { | ||
| span.className += ' cm-newline-empty'; | ||
| } | ||
|
|
||
| return span; | ||
| } | ||
| } | ||
|
|
||
| const baseTheme = EditorView.baseTheme({ | ||
| '.cm-newline': { | ||
| color: 'currentColor', | ||
| pointerEvents: 'none', | ||
| opacity: '0.5', | ||
| '&:not(.cm-newline-empty)': { | ||
| paddingLeft: '3px', | ||
| }, | ||
| }, | ||
| }); | ||
|
|
||
| function highlightNewlines() { | ||
| return [ | ||
| ViewPlugin.fromClass( | ||
| class { | ||
| decorations: DecorationSet; | ||
| constructor(view: EditorView) { | ||
| this.decorations = this.getDecorations(view); | ||
| } | ||
|
|
||
| getDecorations(view: EditorView) { | ||
| const widgets = []; | ||
|
|
||
| for (const { from, to } of view.visibleRanges) { | ||
| for (let pos = from; pos <= to; ) { | ||
| const line = view.state.doc.lineAt(pos); | ||
|
|
||
| if (line.length === 0) { | ||
| widgets.push(Decoration.widget({ widget: new NewlineWidget({ line }), side: 1 }).range(pos)); | ||
| } else { | ||
| widgets.push(Decoration.widget({ widget: new NewlineWidget({ line }), side: 1 }).range(line.to)); | ||
| } | ||
|
|
||
| pos = line.to + 1; | ||
| } | ||
| } | ||
|
|
||
| return Decoration.set(widgets, true); | ||
| } | ||
|
|
||
| update(update: ViewUpdate) { | ||
| if (update.docChanged || update.viewportChanged) { | ||
| this.decorations = this.getDecorations(update.view); | ||
| } | ||
| } | ||
| }, | ||
| { | ||
| decorations: (v) => v.decorations, | ||
| }, | ||
| ), | ||
| baseTheme, | ||
| ]; | ||
| } | ||
|
|
||
| export { highlightNewlines }; |
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