feat(query-editor): enhance current statement framing

apps/desktop/src/lib/sql/currentStatementFrame.ts

@@ -0,0 +1,23 @@
+import type { SqlTextRange } from "@/lib/sql/sqlStatementRanges";
+
+export function currentStatementFrameRangeTo(nextChar: string, range: SqlTextRange): number {
+  return nextChar === ";" ? range.to + 1 : range.to;
+}
+
+export function visualSqlColumns(text: string): number {
+  let columns = 0;
+  for (const ch of text) {
+    if (ch === "\t") {
+      columns += 4;
+    } else if (isWideSqlChar(ch)) {
+      columns += 2;
+    } else {
+      columns += 1;
+    }
+  }
+  return columns;
+}
+
+export function isWideSqlChar(ch: string): boolean {
+  return /[\u1100-\u115f\u2329\u232a\u2e80-\u303e\u3040-\ua4cf\uac00-\ud7a3\uf900-\ufaff\ufe10-\ufe19\ufe30-\ufe6f\uff00-\uff60\uffe0-\uffe6]/u.test(ch);
+}