preact

frontend/node_modules/simple-code-frame/dist/esm/index.js

@@ -0,0 +1,80 @@
+import * as kl from 'kolorist';
+/**
+ * Convert tabs indentation to two spaces.
+ */
+function tabs2Spaces(str) {
+    return str.replace(/^\t+/, tabs => '  '.repeat(tabs.length));
+}
+/**
+ * Generate an excerpt of the location in the source around the
+ * specified position.
+ */
+export function createCodeFrame(text, lineNum, columnNum, { before = 2, after = 3, colors = true, maxWidth = 0, lineMarkerChar = '▶', seperatorChar = '│', columnMarkerChar = '▲' } = {}) {
+    const lines = text.split('\n');
+    const start = Math.max(0, lineNum - before);
+    const end = Math.min(lines.length, lineNum + after + 1);
+    // Maximum space needed for line numbering in the current range.
+    // Necessary when the amount of digits of the line numbering grows:
+    //  999 | asdf
+    // 1000 | asdjadfjsa
+    const maxLineNum = String(end).length;
+    const padding = ' '.repeat(maxLineNum);
+    // Normalize all indentation (=tabs) to use 2 spaces. We need to
+    // apply the difference to the marker position to move it back in
+    // place.
+    const spaceLines = [];
+    let maxLineLen = 0;
+    for (let i = start; i < end; i++) {
+        const line = tabs2Spaces(lines[i]);
+        spaceLines.push(line);
+        if (line.length > maxLineLen)
+            maxLineLen = line.length;
+    }
+    const activeLine = spaceLines[lineNum - start];
+    // Move marker into correct place by taking the amount of
+    // normalized tabs into account
+    const count = Math.max(0, activeLine.length - lines[lineNum].length + columnNum);
+    const maxLensWidth = maxWidth - '> '.length - padding.length - ' | '.length;
+    let left = 0;
+    let right = maxLensWidth;
+    if (maxWidth > 0) {
+        const half = Math.floor(maxLensWidth / 2);
+        let winLeft = count - half;
+        if (winLeft > 0) {
+            let winRight = count + half - 1;
+            left = winLeft;
+            right = winRight;
+            if (winRight > maxLensWidth) {
+                const offset = Math.min(0, winRight - maxLensWidth);
+                left -= offset;
+                right -= offset;
+            }
+        }
+    }
+    const sep = kl.dim(seperatorChar);
+    let out = '';
+    for (let i = 0; i < spaceLines.length; i++) {
+        const line = spaceLines[i];
+        const currentLine = kl.dim((padding + (i + start + 1)).slice(-maxLineNum));
+        let formatted = line;
+        if (maxWidth > 0) {
+            formatted = formatted.slice(left, Math.min(right, line.length));
+            if (left > 0) {
+                formatted = '…' + formatted;
+            }
+            if (line.length > right) {
+                formatted += '…';
+            }
+        }
+        // Line where the error occured
+        if (i === lineNum - start) {
+            out += kl.red(lineMarkerChar) + ` ${currentLine} ${sep} ${formatted}\n`;
+            out += `  ${padding} ${sep} ${' '.repeat(count - left)}${kl.bold(kl.red(columnMarkerChar))}\n`;
+        }
+        else {
+            out += `  ${currentLine} ${sep} ${formatted}\n`;
+        }
+    }
+    return colors ? out : kl.stripColors(out);
+}
+//# sourceMappingURL=index.js.map