Diacritics problem

grails-app/controllers/org/codehaus/groovy/grails/plugins/qrcode/QrcodeController.groovy

@@ -24,7 +24,7 @@ class QrcodeController {
     def referer = request.getHeader("REFERER")
     String size = getSize(params)
     String backupText = "This qrcode was rendered by http://grails.org/plugin/qrcode"
-    qrcodeRenderer.renderPng(response,params.url?:params.text?:referer?:backupText, size?.toInteger())
+    qrcodeRenderer.renderPng(response,params.url?:params.text?:referer?:backupText, size?.toInteger(), params.e, params.c)
   }
 
   /**
@@ -33,10 +33,10 @@ class QrcodeController {
   def url = {
     String uri = params.u?:params.id?:request.getHeader("REFERER")
     String size = getSize(params)
-    qrcodeRenderer.renderPng(response, uri, size.toInteger().intValue())
+    qrcodeRenderer.renderPng(response, uri, size.toInteger().intValue(), params.e, params.c)
   }
 
-  private String getSize(Map params) {
+  private static String getSize(Map params) {
     String size = params.s?:params.size?:params.w?:params.width
     if (!size || size.matches(/\D/)) { size = "300"}
     return size
@@ -49,7 +49,7 @@ class QrcodeController {
   def text = {
     String content = params.t?:params.id
     String size = getSize(params)
-    qrcodeRenderer.renderPng(response, content, size.toInteger().intValue())
+    qrcodeRenderer.renderPng(response, content, size.toInteger().intValue(), params.e, params.c)
   }
 
 

grails-app/taglib/org/codehaus/groovy/grails/plugins/qrcode/QrcodeTagLib.groovy

@@ -24,7 +24,9 @@ class QrcodeTagLib {
   def url = { attrs ->
     def size = attrs.height?:attrs.width
     String target = request.getRequestURL()
-    String src = createLink(controller:'qrcode',action:'url',params:[u:target,s:size])
+    String encoding = attrs.encoding ?: 'UTF-8'
+    String correction = attrs.correction ?: 'L'
+    String src = createLink(controller:'qrcode',action:'url',params:[u:target,s:size,e:encoding,c:correction]).replaceAll('&', '&')
     def mkp = new groovy.xml.MarkupBuilder(out)
     mkp {
       img(alt:url,src:src)
@@ -38,7 +40,9 @@ class QrcodeTagLib {
   def image = { attrs ->
     def size = attrs.height?:attrs.width
     String text = attrs.text
-    String src = createLink(controller:'qrcode',action:'text',params:[t:text,s:size])
+    String encoding = attrs.encoding ?: 'UTF-8'
+    String correction = attrs.correction ?: 'L'
+    String src = createLink(controller:'qrcode',action:'text',params:[t:text,s:size,e:encoding,c:correction]).replaceAll('&', '&')
     def mkp = new groovy.xml.MarkupBuilder(out)
     mkp {
       img(alt:url,src:src)
@@ -52,7 +56,9 @@ class QrcodeTagLib {
     def label = attrs.label?:"qrlink"
     def size = attrs.height?:attrs.width
     String target = request.getRequestURL()
-    String src = createLink(controller:'qrcode',action:'url',params:[u:target,s:size])
+    String encoding = attrs.encoding ?: 'UTF-8'
+    String correction = attrs.correction ?: 'L'
+    String src = createLink(controller:'qrcode',action:'url',params:[u:target,s:size,e:encoding,c:correction]).replaceAll('&', '&')
     out << '''<style>
 #qrcodebox span {
 	display: none;

src/groovy/org/codehaus/groovy/grails/plugins/qrcode/QRCodeRenderer.groovy

@@ -17,7 +17,8 @@ package org.codehaus.groovy.grails.plugins.qrcode
 
 import com.google.zxing.qrcode.QRCodeWriter
 import com.google.zxing.BarcodeFormat
-import com.google.zxing.common.ByteMatrix
+import com.google.zxing.common.BitMatrix
+import com.google.zxing.EncodeHintType
 
 import ar.com.hjg.pngj.ImageInfo
 import ar.com.hjg.pngj.PngWriter
@@ -48,7 +49,7 @@ class QRCodeRenderer {
    * NOTE: this does not mean the <b>image</b> is that size.
    * You will have to scale the image up or down to fit.
    */
-  int calculateMatrixSize(String data) {
+  static int calculateMatrixSize(String data) {
     def length = data.length()
     def sqr = Math.sqrt(length)
     int size = Math.round(sqr + 0.5)
@@ -59,11 +60,31 @@ class QRCodeRenderer {
    * Renders the data supplied in a QRCode of the pixel size (width == height)
    * on the output stream you specify as a PNG.
    */
-  void renderPng(String data, int requestedSize, OutputStream outputStream) {
+  void renderPng(String data, int requestedSize, OutputStream outputStream, String characterSet, String errorCorrection) {
+    Hashtable<EncodeHintType, Object> hints = new Hashtable<EncodeHintType, Object>(2)
+    hints.put(EncodeHintType.CHARACTER_SET, characterSet ?: 'UTF-8')
+    hints.put(EncodeHintType.ERROR_CORRECTION, getErrorCorrectionLevel(errorCorrection))
+
     int size = calculateMatrixSize(data)
-    ByteMatrix matrix = qrcodeWriter.encode(data, format, size, size)
+    BitMatrix matrix = qrcodeWriter.encode(data, format, size, size, hints)
     renderMatrix(matrix, requestedSize, outputStream)
   }
+
+  /**
+   * Get ErrorCorrectionLevel from error correction level string.
+   */
+  private static ErrorCorrectionLevel getErrorCorrectionLevel(String errorCorrection) {
+      switch (errorCorrection.toUpperCase()) {
+          case 'M':
+              return ErrorCorrectionLevel.M
+          case 'H':
+              return ErrorCorrectionLevel.H
+          case 'Q':
+              return ErrorCorrectionLevel.Q
+          default:
+              return ErrorCorrectionLevel.L
+      }
+  }
 
   /**
    * Renders a String inside a QRCode in a RenderedImage object of the width and
@@ -72,7 +93,7 @@ class QRCodeRenderer {
    * renderer will ignore your scale requests and simply report the smallest image
    * it possibly can.
    */
-  void renderMatrix(ByteMatrix matrix, int size, OutputStream outputStream) {
+  void renderMatrix(BitMatrix matrix, int size, OutputStream outputStream) {
     assert size > 0
     int cols = matrix.width
     double scale = size / cols;
@@ -100,7 +121,7 @@ class QRCodeRenderer {
       for (int jj = 0; jj < size; jj++) {
         int x = jj / scale // truncate
         double color = 1.0
-        if (matrix.get(x, y) == 0) {
+        if (matrix.get(x, y)) {
           color = 0.0
         }
         line.setValD(jj * channels, color)
@@ -126,10 +147,10 @@ class QRCodeRenderer {
   /**
    * A simple helper that reports the proper content type to use for a PNG.
    */
-  String getPngContentType() { "image/png" }
+  static String getPngContentType() { "image/png" }
 
-  void renderPng(response, String data, int size) {
+  void renderPng(response, String data, int size, String characterSet, String errorCorrection) {
     response.contentType = "image/png"
-    renderPng(data, size, response.outputStream)
+    renderPng(data, size, response.outputStream, characterSet, errorCorrection)
   }
-}
+}