From 65f4173c27f4619b5d6811894a59ccb5b11cb38f Mon Sep 17 00:00:00 2001
From: Alex Spataru <alex_spataru@outlook.com>
Date: Thu, 12 Oct 2023 22:42:07 -0500
Subject: [PATCH] Update code from changes in private projects

---
 src/QrCodeGenerator.cpp | 128 +++++++++++++++++++++++++++-------------
 src/QrCodeGenerator.h   |  87 +++++++++++++++------------
 2 files changed, 136 insertions(+), 79 deletions(-)

diff --git a/src/QrCodeGenerator.cpp b/src/QrCodeGenerator.cpp
index 4b4e124..8bf4ca3 100644
--- a/src/QrCodeGenerator.cpp
+++ b/src/QrCodeGenerator.cpp
@@ -20,60 +20,104 @@
  * THE SOFTWARE.
  */
 
-#include "QrCodeGenerator.h"
-
 #include <sstream>
 #include <string>
-
 #include <QPainter>
+#include <QTextStream>
 #include <QSvgRenderer>
 
-QrCodeGenerator::QrCodeGenerator(QObject *parent) : QObject(parent) {}
+#include "QrCodeGenerator.h"
 
-QImage QrCodeGenerator::generateQr(const QString &data, const quint16 size,
-                                   const quint16 borderSize,
-                                   qrcodegen::QrCode::Ecc errorCorrection) {
-  QByteArray byteArray = data.toUtf8();
-  const qrcodegen::QrCode qrCode = qrcodegen::QrCode::encodeText(byteArray.constData(),
-                                                                 errorCorrection);
-  return qrCodeToImage(qrCode, borderSize, size);
+/**
+ * @brief Default constructor for the QrCodeGenerator class.
+ * @param parent QObject parent
+ */
+QrCodeGenerator::QrCodeGenerator(QObject *parent)
+    : QObject(parent)
+{
+    // No implementation needed for default constructor.
 }
 
-QString QrCodeGenerator::toSvgString(const qrcodegen::QrCode &qr, quint16 border) const {
-  if (border > INT_MAX / 2 || border * 2 > INT_MAX - qr.getSize())
-    throw std::overflow_error("Border too large");
+/**
+ * @brief Generates a QR code image from a given text string.
+ * @param data The data to encode in the QR code.
+ * @param size The image size for the generated QR code.
+ * @param borderSize The size of the border around the QR code.
+ * @param errorCorrection The level of error correction to apply.
+ * @return QImage representing the generated QR code.
+ */
+QImage QrCodeGenerator::generateQr(const QString &data, quint16 size, quint16 borderSize,
+                                   qrcodegen::QrCode::Ecc errorCorrection)
+{
+    auto b = data.toUtf8();
+    const auto qrCode = qrcodegen::QrCode::encodeText(b.constData(), errorCorrection);
+    return qrCodeToImage(qrCode, borderSize, size);
+}
 
-  std::ostringstream sb;
-  sb << "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n";
-  sb << "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" "
-        "\"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n";
-  sb << "<svg xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" viewBox=\"0 0 ";
-  sb << (qr.getSize() + border * 2) << " " << (qr.getSize() + border * 2)
-     << "\" stroke=\"none\">\n";
-  sb << "\t<rect width=\"100%\" height=\"100%\" fill=\"#FFFFFF\"/>\n";
-  sb << "\t<path d=\"";
-  for (int y = 0; y < qr.getSize(); y++) {
-    for (int x = 0; x < qr.getSize(); x++) {
-      if (qr.getModule(x, y)) {
-        if (x != 0 || y != 0)
-          sb << " ";
-        sb << "M" << (x + border) << "," << (y + border) << "h1v1h-1z";
-      }
+/**
+ * @brief Generates an SVG string representing a QR code.
+ * @param data The data to encode in the QR code.
+ * @param borderSize The size of the border around the QR code.
+ * @param errorCorrection The level of error correction to apply.
+ * @return QString containing the SVG representation of the QR code.
+ */
+QString QrCodeGenerator::generateSvgQr(const QString &data, quint16 borderSize,
+                                       qrcodegen::QrCode::Ecc errorCorrection)
+{
+    auto b = data.toUtf8();
+    const auto qrCode = qrcodegen::QrCode::encodeText(b.constData(), errorCorrection);
+    return toSvgString(qrCode, borderSize);
+}
+
+/**
+ * @brief Converts a QR code to its SVG representation as a string.
+ * @param qr The QR code to convert.
+ * @param border The border size to use.
+ * @return QString containing the SVG representation of the QR code.
+ */
+QString QrCodeGenerator::toSvgString(const qrcodegen::QrCode &qr, quint16 border) const
+{
+    QString str;
+    QTextStream sb(&str);
+
+    sb << R"(<?xml version="1.0" encoding="UTF-8"?>)"
+       << R"(<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">)"
+       << R"(<svg xmlns="http://www.w3.org/2000/svg" version="1.1" viewBox="0 0 )"
+       << (qr.getSize() + border * 2) << " " << (qr.getSize() + border * 2)
+       << R"(" stroke="none"><rect width="100%" height="100%" fill="#FFFFFF"/><path d=")";
+
+    for (int y = 0; y < qr.getSize(); y++)
+    {
+        for (int x = 0; x < qr.getSize(); x++)
+        {
+            if (qr.getModule(x, y))
+            {
+                sb << (x == 0 && y == 0 ? "" : " ") << "M" << (x + border) << "," << (y + border)
+                   << "h1v1h-1z";
+            }
+        }
     }
-  }
-  sb << "\" fill=\"#000000\"/>\n";
-  sb << "</svg>\n";
 
-  return QString::fromStdString(sb.str());
+    sb << R"(" fill="#000000"/></svg>)";
+    return str;
 }
 
+/**
+ * @brief Converts a QR code to a QImage.
+ * @param qrCode The QR code to convert.
+ * @param border The border size to use.
+ * @param size The image size to generate.
+ * @return QImage representing the QR code.
+ */
 QImage QrCodeGenerator::qrCodeToImage(const qrcodegen::QrCode &qrCode, quint16 border,
-                                      const quint16 size) const {
-  auto svg = toSvgString(qrCode, border);
-  QSvgRenderer render(svg.toUtf8());
-  QImage image(size, size, QImage::Format_Mono);
-  image.fill(Qt::white);
-  QPainter painter(&image);
-  render.render(&painter);
-  return image;
+                                      quint16 size) const
+{
+    QString svg = toSvgString(qrCode, border);
+    QSvgRenderer render(svg.toUtf8());
+    QImage image(size, size, QImage::Format_Mono);
+    image.fill(Qt::white);
+    QPainter painter(&image);
+    painter.setRenderHint(QPainter::Antialiasing);
+    render.render(&painter);
+    return image;
 }
diff --git a/src/QrCodeGenerator.h b/src/QrCodeGenerator.h
index ac57900..694d60b 100644
--- a/src/QrCodeGenerator.h
+++ b/src/QrCodeGenerator.h
@@ -30,47 +30,60 @@
 
 /**
  * @class QrCodeGenerator
- * @brief The QrCodeGenerator class is a simple C++ class that uses the qrcodegen library to
- *        generate QR codes from QStrings in Qt applications.
+ * @brief The QrCodeGenerator class is a simple C++ class that uses the qrcodegen library
+ * to generate QR codes from QStrings in Qt applications.
  */
-class QrCodeGenerator : public QObject {
+class QrCodeGenerator : public QObject
+{
 public:
-  /**
-   * @brief Constructs a QrCodeGenerator object.
-   * @param parent The parent QObject.
-   */
-  explicit QrCodeGenerator(QObject *parent = nullptr);
+    /**
+     * @brief Constructs a QrCodeGenerator object.
+     * @param parent The parent QObject.
+     */
+    explicit QrCodeGenerator(QObject *parent = nullptr);
 
-  /**
-   * @brief Generates a QR code from the given data and error correction level.
-   * @param data The QString containing the data to encode in the QR code.
-   * @param size The desired width/height of the generated image (default: 500).
-   * @param borderSize The desired border width of the generated image (default: 1).
-   * @param errorCorrection The desired error correction level (default:
-   * qrcodegen::QrCode::Ecc::MEDIUM).
-   *
-   * @return QImage containing the generated QR code.
-   */
-  QImage generateQr(const QString &data, const quint16 size = 500, const quint16 borderSize = 1,
-                    qrcodegen::QrCode::Ecc errorCorrection = qrcodegen::QrCode::Ecc::MEDIUM);
+    /**
+     * @brief Generates a QR code from the given data and error correction level.
+     * @param data The QString containing the data to encode in the QR code.
+     * @param size The desired width/height of the generated image (default: 500).
+     * @param borderSize The desired border width of the generated image (default: 1).
+     * @param errorCorrection The desired error correction level (default:
+     * qrcodegen::QrCode::Ecc::MEDIUM).
+     *
+     * @return QImage containing the generated QR code.
+     */
+    QImage generateQr(const QString &data, const quint16 size = 1000, const quint16 borderSize = 1,
+                      qrcodegen::QrCode::Ecc errorCorrection = qrcodegen::QrCode::Ecc::MEDIUM);
+
+    /**
+     * @brief Generates a QR code from the given data and error correction level.
+     * @param data The QString containing the data to encode in the QR code.
+     * @param borderSize The desired border width of the generated image (default: 1).
+     * @param errorCorrection The desired error correction level (default:
+     * qrcodegen::QrCode::Ecc::MEDIUM).
+     *
+     * @return QString string containing the generated QR code in SVG format.
+     */
+    QString generateSvgQr(const QString &data, const quint16 borderSize = 1,
+                          qrcodegen::QrCode::Ecc errorCorrection = qrcodegen::QrCode::Ecc::MEDIUM);
 
 private:
-  /**
-   * @brief Converts a qrcodegen::QrCode object to a SVG image.
-   * @param qrCode The qrcodegen::QrCode object to convert.
-   * @param borderSize The desired border width of the generated image (default: 1).
-   *
-   * @return QImage containing the QR code.
-   */
-  QString toSvgString(const qrcodegen::QrCode &qr, quint16 border) const;
+    /**
+     * @brief Converts a qrcodegen::QrCode object to a SVG image.
+     * @param qrCode The qrcodegen::QrCode object to convert.
+     * @param border The desired border width of the generated image (default: 1).
+     *
+     * @return SVG containing the QR code.
+     */
+    QString toSvgString(const qrcodegen::QrCode &qr, quint16 border) const;
 
-  /**
-   * @brief Converts a qrcodegen::QrCode object to a QImage.
-   * @param qrCode The qrcodegen::QrCode object to convert.
-   * @param size The desired width/height of the generated image.
-   * @param borderSize The desired border width of the generated image.
-   *
-   * @return QImage containing the QR code.
-   */
-  QImage qrCodeToImage(const qrcodegen::QrCode &qrCode, quint16 border, const quint16 size) const;
+    /**
+     * @brief Converts a qrcodegen::QrCode object to a QImage.
+     * @param qrCode The qrcodegen::QrCode object to convert.
+     * @param size The desired width/height of the generated image.
+     * @param borderSize The desired border width of the generated image.
+     *
+     * @return QImage containing the QR code.
+     */
+    QImage qrCodeToImage(const qrcodegen::QrCode &qrCode, quint16 border, const quint16 size) const;
 };