Carlos Florêncio
62 lines
1.8 KiB
TypeScript
62 lines
1.8 KiB
TypeScript
import { useState, useEffect, useMemo } from "react";
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import type { editor as monacoEditor } from "monaco-editor";
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interface UseDiffEditorHeightOptions {
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modifiedEditor: monacoEditor.ICodeEditor | null;
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originalEditor: monacoEditor.ICodeEditor | null;
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compact: boolean;
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lineHeight: number;
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originalContent: string;
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modifiedContent: string;
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}
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const MIN_HEIGHT = 80;
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const MAX_HEIGHT_NORMAL = 600;
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const MAX_HEIGHT_COMPACT = 300;
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function clampHeight(h: number, compact: boolean): number {
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const max = compact ? MAX_HEIGHT_COMPACT : MAX_HEIGHT_NORMAL;
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return Math.min(Math.max(h, MIN_HEIGHT), max);
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}
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export function useDiffEditorHeight({
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modifiedEditor,
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originalEditor,
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compact,
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lineHeight,
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originalContent,
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modifiedContent,
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}: UseDiffEditorHeightOptions): number {
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// Estimate before editors mount
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const estimatedHeight = useMemo(() => {
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const lines = Math.max(originalContent.split("\n").length, modifiedContent.split("\n").length);
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return clampHeight(lines * lineHeight + 10, compact);
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}, [originalContent, modifiedContent, lineHeight, compact]);
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const [editorHeight, setEditorHeight] = useState<number | null>(null);
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// Subscribe to content size changes on both editors
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useEffect(() => {
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if (!modifiedEditor || !originalEditor) return;
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const update = () => {
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const modH = modifiedEditor.getContentHeight();
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const origH = originalEditor.getContentHeight();
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setEditorHeight(clampHeight(Math.max(modH, origH), compact));
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};
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update();
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const d1 = modifiedEditor.onDidContentSizeChange(update);
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const d2 = originalEditor.onDidContentSizeChange(update);
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return () => {
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d1.dispose();
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d2.dispose();
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setEditorHeight(null);
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};
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}, [modifiedEditor, originalEditor, compact]);
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return editorHeight ?? estimatedHeight;
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}
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