WIP: baseline on fix/retry-failure-root-causes

agent/jrxml_windower.py

@@ -181,6 +181,28 @@ def split_band_into_windows(band: BandInfo, max_chars: int = 4000) -> list[str]:
 
 # ── 重组 ──────────────────────────────────────────────────────────
 
+def _recalc_band_height(band_xml: str, margin: int = 20) -> str:
+    """根据波段内所有子元素的 y + height 重新计算波段 height。"""
+    max_bottom = 0
+    for m in re.finditer(r'<reportElement\b([^>]*)/>', band_xml):
+        attrs = m.group(1)
+        ym = re.search(r'\sy\s*=\s*"(\d+)"', attrs)
+        hm = re.search(r'\sheight\s*=\s*"(\d+)"', attrs)
+        if ym and hm:
+            bottom = int(ym.group(1)) + int(hm.group(1))
+            if bottom > max_bottom:
+                max_bottom = bottom
+    if max_bottom == 0:
+        return band_xml
+    new_height = max_bottom + margin
+    return re.sub(
+        r'(<band\b[^>]*\sheight\s*=\s*)"(\d+)"',
+        rf'\g<1>"{new_height}"',
+        band_xml,
+        count=1,
+    )
+
+
 def reassemble_band_windows(modified_windows: list[str]) -> str:
     """将多个窗口的修改结果重新合并为一个 band XML。
 
@@ -188,12 +210,12 @@ def reassemble_band_windows(modified_windows: list[str]) -> str:
     中间拼接所有窗口内部的元素内容。
     """
     if len(modified_windows) == 1:
-        return modified_windows[0]
+        return _recalc_band_height(modified_windows[0])
 
     first = modified_windows[0]
     band_open_end = first.find(">")
     if band_open_end == -1:
-        return "\n".join(modified_windows)
+        return _recalc_band_height("\n".join(modified_windows))
     band_open = first[:band_open_end + 1]
 
     last = modified_windows[-1]
@@ -205,7 +227,7 @@ def reassemble_band_windows(modified_windows: list[str]) -> str:
         if inner:
             inner_parts.append(inner)
 
-    return band_open + "\n" + "\n".join(inner_parts) + "\n" + band_close
+    return _recalc_band_height(band_open + "\n" + "\n".join(inner_parts) + "\n" + band_close)
 
 
 def reassemble_jrxml(parts: JRXMLParts, modified_bands: dict[str, str]) -> str: