feat(签章标识): 规范签章标识与导入合并

ofdgo_sign_write_stamp.go

@@ -18,7 +18,7 @@ import (
 	"fmt"
 	"math"
 	"strconv"
-	"strings"
+	"unicode/utf8"
 )
 
 // SignaturePageStamps 生成所选页面相同毫米坐标的印章位置并检查页内范围
@@ -142,13 +142,29 @@ func signatureWriteStamps(r *Reader, stamps []SignatureStamp, seal bool) ([]Sign
 	return result, nil
 }
 
-// signatureWriteIDValid 检查可互通的签章标识字符
+// signatureWriteIDValid 按XML 1.0的NCName规则校验签章标识
 // 入参: id 标识
 // 返回: bool 是否有效
 func signatureWriteIDValid(id string) bool {
-	return id != "" && len(id) <= 128 && strings.IndexFunc(id, func(c rune) bool {
-		return !(c >= 'a' && c <= 'z' || c >= 'A' && c <= 'Z' || c >= '0' && c <= '9' || c == '_' || c == '-' || c == '.')
-	}) == -1
+	if id == "" || !utf8.ValidString(id) {
+		return false
+	}
+	for i, c := range id {
+		if c == '_' || c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z' ||
+			c >= 0xC0 && c <= 0xD6 || c >= 0xD8 && c <= 0xF6 ||
+			c >= 0xF8 && c <= 0x2FF || c >= 0x370 && c <= 0x37D ||
+			c >= 0x37F && c <= 0x1FFF || c >= 0x200C && c <= 0x200D ||
+			c >= 0x2070 && c <= 0x218F || c >= 0x2C00 && c <= 0x2FEF ||
+			c >= 0x3001 && c <= 0xD7FF || c >= 0xF900 && c <= 0xFDCF ||
+			c >= 0xFDF0 && c <= 0xFFFD || c >= 0x10000 && c <= 0xEFFFF {
+			continue
+		}
+		if i == 0 || !(c == '-' || c == '.' || c >= '0' && c <= '9' ||
+			c == 0xB7 || c >= 0x300 && c <= 0x36F || c >= 0x203F && c <= 0x2040) {
+			return false
+		}
+	}
+	return true
 }
 
 // signatureWriteBoxValid 判断印章区域是否有限且尺寸为正