improve parsing 2

2026-09-02 12:35:41 +02:00
parent e98fb0e7f4
commit 98574af903
9 changed files with 1721 additions and 0 deletions
@@ -0,0 +1,57 @@
+/// Normalized rectangle (0–1) on the receipt photo for review highlights.
+library;
+
+class ReceiptBounds {
+  const ReceiptBounds({
+    required this.left,
+    required this.top,
+    required this.right,
+    required this.bottom,
+  });
+
+  final double left;
+  final double top;
+  final double right;
+  final double bottom;
+
+  bool get isEmpty => right <= left || bottom <= top;
+
+  ReceiptBounds union(ReceiptBounds other) {
+    if (isEmpty) return other;
+    if (other.isEmpty) return this;
+    return ReceiptBounds(
+      left: left < other.left ? left : other.left,
+      top: top < other.top ? top : other.top,
+      right: right > other.right ? right : other.right,
+      bottom: bottom > other.bottom ? bottom : other.bottom,
+    );
+  }
+
+  static ReceiptBounds? merge(Iterable<ReceiptBounds> bounds) {
+    ReceiptBounds? merged;
+    for (final box in bounds) {
+      if (box.isEmpty) continue;
+      merged = merged == null ? box : merged.union(box);
+    }
+    return merged;
+  }
+
+  static ReceiptBounds fromPixelRect({
+    required double left,
+    required double top,
+    required double right,
+    required double bottom,
+    required double imageWidth,
+    required double imageHeight,
+  }) {
+    if (imageWidth <= 0 || imageHeight <= 0) {
+      return const ReceiptBounds(left: 0, top: 0, right: 0, bottom: 0);
+    }
+    return ReceiptBounds(
+      left: left / imageWidth,
+      top: top / imageHeight,
+      right: right / imageWidth,
+      bottom: bottom / imageHeight,
+    );
+  }
+}