1 files changed, 165 insertions, 0 deletions
diff --git a/src/texteditor.h b/src/texteditor.h
new file mode 100644
index 00000000..dc53f1c4
--- /dev/null
+++ b/src/texteditor.h
@@ -0,0 +1,165 @@
+#ifndef MO_TEXTEDITOR_H
+#define MO_TEXTEDITOR_H
+
+#include <QPlainTextEdit>
+
+class TextEditor;
+
+class TextEditorToolbar : public QFrame
+{
+  Q_OBJECT;
+
+public:
+  TextEditorToolbar(TextEditor& editor);
+
+private:
+  TextEditor& m_editor;
+  QAction* m_save;
+  QAction* m_wordWrap;
+  QAction* m_explore;
+  QLineEdit* m_path;
+
+  void onTextModified(bool b);
+  void onWordWrap(bool b);
+  void onLoaded(const QString& s);
+};
+
+
+// mostly from https://doc.qt.io/qt-5/qtwidgets-widgets-codeeditor-example.html
+//
+class TextEditorLineNumbers : public QFrame
+{
+  Q_OBJECT;
+  Q_PROPERTY(QColor textColor READ textColor WRITE setTextColor);
+  Q_PROPERTY(QColor backgroundColor READ backgroundColor WRITE setBackgroundColor);
+
+public:
+  TextEditorLineNumbers(TextEditor& editor);
+
+  QSize sizeHint() const override;
+  int areaWidth() const;
+
+  QColor textColor() const;
+  void setTextColor(const QColor& c);
+
+  QColor backgroundColor() const;
+  void setBackgroundColor(const QColor& c);
+
+protected:
+  void paintEvent(QPaintEvent *event) override;
+
+private:
+  TextEditor& m_editor;
+  QColor m_background, m_text;
+
+  void updateAreaWidth();
+  void updateArea(const QRect &rect, int dy);
+};
+
+
+class TextEditorHighlighter : public QSyntaxHighlighter
+{
+  Q_OBJECT;
+
+public:
+  TextEditorHighlighter(QTextDocument* doc);
+
+  QColor backgroundColor() const;
+  void setBackgroundColor(const QColor& c);
+
+  QColor textColor() const;
+  void setTextColor(const QColor& c);
+
+protected:
+  void highlightBlock(const QString& text) override;
+
+private:
+  QColor m_background, m_text;
+
+  void changed();
+};
+
+
+class TextEditor : public QPlainTextEdit
+{
+  Q_OBJECT;
+  Q_PROPERTY(QColor textColor READ textColor WRITE setTextColor);
+  Q_PROPERTY(QColor backgroundColor READ backgroundColor WRITE setBackgroundColor);
+  Q_PROPERTY(QColor highlightBackgroundColor READ highlightBackgroundColor WRITE setHighlightBackgroundColor);
+
+  friend class TextEditorLineNumbers;
+
+public:
+  TextEditor(QWidget* parent=nullptr);
+
+  void setupToolbar();
+
+  void clear();
+  bool load(const QString& filename);
+  bool save();
+
+  const QString& filename() const;
+
+  void wordWrap(bool b);
+  void toggleWordWrap();
+  bool wordWrap() const;
+
+  bool dirty() const;
+
+  QColor backgroundColor() const;
+  void setBackgroundColor(const QColor& c);
+
+  QColor textColor() const;
+  void setTextColor(const QColor& c);
+
+  QColor highlightBackgroundColor() const;
+  void setHighlightBackgroundColor(const QColor& c);
+
+  void explore();
+
+signals:
+  void loaded(QString filename);
+  void modified(bool b);
+  void wordWrapChanged(bool b);
+
+protected:
+  void resizeEvent(QResizeEvent* e) override;
+
+private:
+  TextEditorToolbar* m_toolbar;
+  TextEditorLineNumbers* m_lineNumbers;
+  TextEditorHighlighter* m_highlighter;
+  QColor m_highlightBackground;
+  QString m_filename;
+  QString m_encoding;
+  bool m_dirty;
+  bool m_loading;
+
+  void setDefaultStyle();
+  void onModified(bool b);
+  void dirty(bool b);
+
+  QWidget* wrapEditWidget();
+
+  void highlightCurrentLine();
+  void paintLineNumbers(QPaintEvent* e, const QColor& textColor);
+};
+
+
+class HTMLEditor : public QTextEdit
+{
+  Q_OBJECT;
+
+public:
+  using QTextEdit::QTextEdit;
+
+signals:
+  void editingFinished();
+
+protected:
+  void focusOutEvent(QFocusEvent* e);
+
+private:
+};
+
+#endif // MO_TEXTEDITOR_H