clipboard preview leading tab trimming while preserving indentation + proper width calculations

Helpers/ClipHistory.qml

@@ -20,10 +20,8 @@ Singleton {
 			}))
 	property string previewImageFile: "/tmp/qs-cliphist-preview.img"
 	property string previewImageSource: ""
-	property bool previewIsCode: looksLikeCode(previewText)
 	property bool previewIsImage: false
-	readonly property string previewMarkup: previewIsCode ? generateHighlightedMarkup(previewText) : previewText
-	property string previewText: ""
+	property list<var> previewText: []
 	property int previewToken: 0
 	property real scoreThreshold: 0.2
 
@@ -59,119 +57,37 @@ Singleton {
 		});
 	}
 
-	function generateHighlightedMarkup(text): string {
-		const raw = String(text ?? "");
-		const lines = raw.split("\n").map(line => highlightCodeLine(line));
-		return `<div style="font-family:monospace; white-space:pre-wrap;">${lines.join("<br>")}</div>`;
-	}
-
-	function highlightCodeLine(rawLine): string {
-		const line = String(rawLine ?? "");
-
-		const kwColor = DynamicColors.palette.m3primary;
-		const strColor = DynamicColors.palette.m3tertiary;
-		const comColor = Qt.alpha(DynamicColors.palette.m3onSurface, 0.55);
-
-		const keywordRe = /\b(function|class|import|const|let|var|if|else|for|while|return|switch|case|break|continue|try|catch|throw|async|await|new|null|true|false|public|private|protected|static|extends|struct|enum)\b/g;
-
-		let out = "";
-		let i = 0;
-
-		while (i < line.length) {
-			const ch = line[i];
-
-			// Line comment
-			if (line.slice(i, i + 2) === "//") {
-				out += `<span style="color:${comColor};">${escapeHtml(line.slice(i))}</span>`;
-				break;
-			}
-
-			// Shell/Python-style comment
-			if (ch === "#" && i === 0) {
-				out += `<span style="color:${comColor};">${escapeHtml(line.slice(i))}</span>`;
-				break;
-			}
-
-			// Quoted string
-			if (ch === "'" || ch === '"' || ch === "`") {
-				const quote = ch;
-				let j = i + 1;
-				while (j < line.length) {
-					if (line[j] === "\\") {
-						j += 2;
-						continue;
-					}
-					if (line[j] === quote) {
-						j += 1;
-						break;
-					}
-					j += 1;
-				}
-
-				out += `<span style="color:${strColor};">${escapeHtml(line.slice(i, j))}</span>`;
-				i = j;
-				continue;
-			}
-
-			// Plain code text until next special token
-			let j = i;
-			while (j < line.length) {
-				const two = line.slice(j, j + 2);
-				const c = line[j];
-
-				if (two === "//")
-					break;
-				if (c === "'" || c === '"' || c === "`")
-					break;
-				if (c === "#" && j === 0)
-					break;
-
-				j += 1;
-			}
-
-			let segment = escapeHtml(line.slice(i, j));
-			segment = segment.replace(keywordRe, `<span style="color:${kwColor}; font-weight:600;">$1</span>`);
-			out += segment;
-			i = j;
-		}
-
-		return out === "" ? "&nbsp;" : out;
-	}
-
-	function looksLikeCode(text): bool {
-		const t = String(text ?? "").trim();
-
-		if (t === "")
-			return false;
-
-		const lines = t.split("\n");
-
-		if (lines.length < 2)
-			return false;
-
-		let score = 0;
-
-		for (const line of lines) {
-			if (/^\s{4,}|\t/.test(line))
-				score += 2;
-
-			if (/[{}()[\];]/.test(line))
-				score += 1;
-
-			if (/\b(function|class|import|const|let|var|if|else|for|while|return|switch|case|try|catch|async|await)\b/.test(line))
-				score += 2;
-
-			if (/=>|:=/.test(line))
-				score += 1;
-		}
-
-		return score >= 4;
-	}
-
 	function paste(entry): void {
 		Quickshell.execDetached(["bash", "-c", `printf '${shellSingleQuoteEscape(entry)}' | ${root.cliphistBinary} decode | wl-copy && wl-paste`]);
 	}
 
+	function processPreviewLines(text: string): var {
+		if (text === "")
+			return [];
+		const lines = text.split("\n");
+		let minIndent = Infinity;
+		for (let i = 0; i < lines.length; i++) {
+			const m = lines[i].match(/^(\s*)/);
+			const indent = m ? m[1].length : 0;
+			if (lines[i].trim().length > 0 && indent < minIndent)
+				minIndent = indent;
+		}
+		if (minIndent === Infinity)
+			minIndent = 0;
+		const result = [];
+		for (let i = 0; i < lines.length; i++) {
+			const line = lines[i];
+			const indentMatch = line.match(/^(\s*)/);
+			const indentLen = indentMatch ? indentMatch[1].length : 0;
+			const stripped = line.slice(Math.min(minIndent, indentLen));
+			result.push({
+				line: i + 1,
+				text: stripped
+			});
+		}
+		return result;
+	}
+
 	function refresh(): void {
 		readProc.buffer = [];
 		readProc.running = true;
@@ -182,7 +98,7 @@ Singleton {
 		const token = previewToken;
 
 		if (!currentEntry) {
-			previewText = "";
+			previewText = [];
 			previewImageSource = "";
 			previewIsImage = false;
 			return;
@@ -269,7 +185,7 @@ Singleton {
 			onStreamFinished: {
 				if (previewTextProc.token !== root.previewToken)
 					return;
-				root.previewText = this.text;
+				root.previewText = root.processPreviewLines(this.text);
 			}
 		}
 	}