<refactor, feat>(ui): Text editor improvements.

1. Add binary display mode
2. Add information bar
3. Added character code recognition function.
4. Identify text encoding and line breaks
5. Count the number of characters
6. Code reconstruction

1 files changed, 114 insertions, 0 deletions

diff --git a/src/ui/widgets/PlainTextEditorPage.h b/src/ui/widgets/PlainTextEditorPage.h
new file mode 100644
index 00000000..24823c06
--- /dev/null
+++ b/src/ui/widgets/PlainTextEditorPage.h
@@ -0,0 +1,114 @@
+/**
+ * This file is part of GpgFrontend.
+ *
+ * GpgFrontend is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Foobar is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Foobar.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * The initial version of the source code is inherited from gpg4usb-team.
+ * Their source code version also complies with GNU General Public License.
+ *
+ * The source code version of this software was modified and released
+ * by Saturneric<[email protected]> starting on May 12, 2021.
+ *
+ */
+
+#ifndef __EDITORPAGE_H__
+#define __EDITORPAGE_H__
+
+#include "gpg/GpgConstants.h"
+#include "ui/GpgFrontendUI.h"
+
+class Ui_PlainTextEditor;
+
+namespace GpgFrontend::UI {
+
+/**
+ * @brief Class for handling a single tab of the tabwidget
+ *
+ */
+class PlainTextEditorPage : public QWidget {
+  Q_OBJECT
+ public:
+  /**
+   * @details Add layout and add plaintextedit
+   *
+   * @param filePath Path of the file handled in this tab
+   * @param parent Pointer to the parent widget
+   */
+  explicit PlainTextEditorPage(QString filePath = "",
+                               QWidget* parent = nullptr);
+
+  /**
+   * @details Get the filepath of the currently activated tab.
+   */
+  [[nodiscard]] const QString& getFilePath() const;
+
+  /**
+   * @details Set filepath of currently activated tab.
+   *
+   * @param filePath The path to be set
+   */
+  void setFilePath(const QString& filePath);
+
+  /**
+   * @details Return pointer tp the textedit of the currently activated tab.
+   */
+  QPlainTextEdit* getTextPage();
+
+  /**
+   * @details Show additional widget at buttom of currently active tab
+   *
+   * @param widget The widget to be added
+   * @param className The name to handle the added widget
+   */
+  void showNotificationWidget(QWidget* widget, const char* className);
+
+  /**
+   * @details Hide all widgets with the given className
+   *
+   * @param className The classname of the widgets to hide
+   */
+  void closeNoteByClass(const char* className);
+
+  void ReadFile();
+
+  [[nodiscard]] bool ReadDone() const { return this->read_done_; }
+
+  void PrepareToDestroy();
+
+ private:
+  std::shared_ptr<Ui_PlainTextEditor> ui;
+  QString full_file_path_; /** The path to the file handled in the tab */
+  bool signMarked{}; /** true, if the signed header is marked, false if not */
+  bool read_done_ = false;
+  QThread* read_thread_ = nullptr;
+  bool binary_mode_ = false;
+  size_t read_bytes_ = 0;
+
+  void detect_encoding(const std::string& data);
+
+  void detect_cr_lf(const QString& data);
+
+ private slots:
+
+  /**
+   * @details Format the gpg header in another font-style
+   */
+  void slotFormatGpgHeader();
+
+  void slotInsertText(const std::string& data);
+};
+
+}  // namespace GpgFrontend::UI
+
+#endif  // __EDITORPAGE_H__