Extracted EpcQrCodeStringFormatter

EpcQrCode/src/commonMain/kotlin/net/codinux/banking/epcqrcode/EpcQrCode.kt

@@ -21,6 +21,13 @@ open class EpcQrCode(
   open val bytes: ByteArray
     get() = bitmap.extractBytes()
 
+  open val height: Int
+    get() = bitmap.height
+
+  open val width: Int
+    get() = bitmap.width
+
+
 
   constructor(bitmap: Bitmap32) : this(bitmap, DefaultHeightAndWidth) // convenience constructor for languages that don't support default parameters
 
@@ -35,74 +42,19 @@ open class EpcQrCode(
 
 
   open fun qrCodeAsString(): String {
-    val string = StringBuilder(bitmap.height * bitmap.width)
-
-    for (y in 1 until bitmap.height) {
-      for (x in 1 until bitmap.width) {
-        if (isBitSet(x, y)) {
-          string.append("██")
-        } else {
-          string.append("  ")
-        }
-      }
-
-      string.appendLine()
-    }
-
-    return string.toString()
+    return EpcQrCodeStringFormatter().asString(this)
   }
 
   open fun qrCodeAsSmallString(): String {
-    val string = StringBuilder(bitmap.height * bitmap.width)
-
-    for (y in 1 until bitmap.height - 1 step 2) {
-      for (x in 1 until bitmap.width) {
-        val currentRowBit = bitmap.getInt(x, y)
-        val nextRowBit = bitmap.getInt(x, y + 1)
-
-        if (currentRowBit == nextRowBit) {
-          if (isBitSet(currentRowBit)) {
-            string.append("█")
-          } else {
-            string.append(" ")
-          }
-        } else {
-          if (isBitSet(currentRowBit)) {
-            string.append("▀")
-          } else {
-            string.append("▄")
-          }
-        }
-      }
-
-      string.appendLine()
-    }
-
-    if (bitmap.height % 2 == 0) { // if last row is odd
-      val y = bitmap.height - 1
-      for (x in 1 until bitmap.width) {
-        if (isBitSet(x, y)) {
-          string.append("▀")
-        } else {
-          string.append(" ")
-        }
-      }
-
-      string.appendLine()
-    }
-
-    return string.toString()
+    return EpcQrCodeStringFormatter().asSmallString(this)
   }
 
-  protected open fun isBitSet(x: Int, y: Int): Boolean {
-    val qrCodeBit = bitmap.getInt(x, y)
 
-    return isBitSet(qrCodeBit)
-  }
-
-  protected open fun isBitSet(qrCodeBitColorCode: Int): Boolean {
-    // black = -1, white = -16777216
-    return qrCodeBitColorCode < -1
+  /**
+   * black = -1, white = -16777216
+   */
+  open fun getColorCodeAt(x: Int, y: Int): Int {
+    return bitmap.getInt(x, y)
   }
 
 }

EpcQrCode/src/commonMain/kotlin/net/codinux/banking/epcqrcode/EpcQrCodeStringFormatter.kt

@@ -0,0 +1,80 @@
+package net.codinux.banking.epcqrcode
+
+open class EpcQrCodeStringFormatter {
+
+  open fun asString(epcQrCode: EpcQrCode): String {
+    val height = epcQrCode.height
+    val width = epcQrCode.width
+    val string = StringBuilder(height * width)
+
+    for (y in 1 until height) {
+      for (x in 1 until width) {
+        if (isBitSet(epcQrCode, x, y)) {
+          string.append("██")
+        } else {
+          string.append("  ")
+        }
+      }
+
+      string.appendLine()
+    }
+
+    return string.toString()
+  }
+
+  open fun asSmallString(epcQrCode: EpcQrCode): String {
+    val height = epcQrCode.height
+    val width = epcQrCode.width
+    val string = StringBuilder(height * width)
+
+    for (y in 1 until height - 1 step 2) {
+      for (x in 1 until width) {
+        val currentRowBit = epcQrCode.getColorCodeAt(x, y)
+        val nextRowBit = epcQrCode.getColorCodeAt(x, y + 1)
+
+        if (currentRowBit == nextRowBit) {
+          if (isBitSet(currentRowBit)) {
+            string.append("█")
+          } else {
+            string.append(" ")
+          }
+        } else {
+          if (isBitSet(currentRowBit)) {
+            string.append("▀")
+          } else {
+            string.append("▄")
+          }
+        }
+      }
+
+      string.appendLine()
+    }
+
+    if (height % 2 == 0) { // if last row is odd
+      val y = height - 1
+      for (x in 1 until width) {
+        if (isBitSet(epcQrCode, x, y)) {
+          string.append("▀")
+        } else {
+          string.append(" ")
+        }
+      }
+
+      string.appendLine()
+    }
+
+    return string.toString()
+  }
+
+  protected open fun isBitSet(epcQrCode: EpcQrCode, x: Int, y: Int): Boolean {
+    val qrCodeBit = epcQrCode.getColorCodeAt(x, y)
+
+    return isBitSet(qrCodeBit)
+  }
+
+  protected open fun isBitSet(qrCodeBitColorCode: Int): Boolean {
+    // black = -1, white = -16777216
+    return qrCodeBitColorCode < -1
+  }
+
+}