style & feat: format codes & underline occurrence other than frame

The occurrences were framed, but it sometimes cost a long time which is
perceptible by the users. What's worse, it sometimes needs many undos,
which is described in Megaxela#20.

After this change, the occurrences are underlined other than framed,
and the words are find by whole-word rule. This is fast and doesn't
need any undos.

It may be possible to use frames which is more beatiful without being
slow or modifying the text, but I'm just lazy to implement it.

CMakeLists.txt

@@ -30,7 +30,6 @@ set(INCLUDE_FILES
     include/QLuaCompleter
     include/QLuaHighlighter
     include/QPythonHighlighter
-    include/QFramedTextAttribute
     include/internal/QHighlightRule.hpp
     include/internal/QHighlightBlockRule.hpp
     include/internal/QCodeEditor.hpp
@@ -47,7 +46,6 @@ set(INCLUDE_FILES
     include/internal/QLuaHighlighter.hpp
     include/internal/QPythonCompleter.hpp
     include/internal/QPythonHighlighter.hpp
-    include/internal/QFramedTextAttribute.hpp
 )
 
 set(SOURCE_FILES
@@ -65,7 +63,6 @@ set(SOURCE_FILES
     src/internal/QLuaHighlighter.cpp
     src/internal/QPythonCompleter.cpp
     src/internal/QPythonHighlighter.cpp
-    src/internal/QFramedTextAttribute.cpp
 )
 
 # Create code for QObjects

include/internal/QCodeEditor.hpp

@@ -16,16 +16,16 @@ class QCodeEditor : public QTextEdit
 {
     Q_OBJECT
 
-public:
+  public:
     /**
      * @brief Constructor.
      * @param widget Pointer to parent widget.
      */
-    explicit QCodeEditor(QWidget* widget=nullptr);
+    explicit QCodeEditor(QWidget *widget = nullptr);
 
     // Disable copying
-    QCodeEditor(const QCodeEditor&) = delete;
-    QCodeEditor& operator=(const QCodeEditor&) = delete;
+    QCodeEditor(const QCodeEditor &) = delete;
+    QCodeEditor &operator=(const QCodeEditor &) = delete;
 
     /**
      * @brief Method for getting first visible block
@@ -38,13 +38,13 @@ class QCodeEditor : public QTextEdit
      * @brief Method for setting highlighter.
      * @param highlighter Pointer to syntax highlighter.
      */
-    void setHighlighter(QStyleSyntaxHighlighter* highlighter);
+    void setHighlighter(QStyleSyntaxHighlighter *highlighter);
 
     /**
      * @brief Method for setting syntax sty.e.
      * @param style Pointer to syntax style.
      */
-    void setSyntaxStyle(QSyntaxStyle* style);
+    void setSyntaxStyle(QSyntaxStyle *style);
 
     /**
      * @brief Method setting auto parentheses enabled.
@@ -98,15 +98,15 @@ class QCodeEditor : public QTextEdit
      * @brief Method for setting completer.
      * @param completer Pointer to completer object.
      */
-    void setCompleter(QCompleter* completer);
+    void setCompleter(QCompleter *completer);
 
     /**
      * @brief Method for getting completer.
      * @return Pointer to completer.
      */
-    QCompleter* completer() const;
+    QCompleter *completer() const;
 
-public Q_SLOTS:
+  public Q_SLOTS:
 
     /**
      * @brief Slot, that performs insertion of
@@ -127,45 +127,40 @@ public Q_SLOTS:
      * part of line number area.
      * @param rect Area that has to be updated.
      */
-    void updateLineNumberArea(const QRect& rect);
+    void updateLineNumberArea(const QRect &rect);
 
     /**
      * @brief Slot, that will proceed extra selection
      * for current cursor position.
      */
-    void updateExtraSelection();
+    void updateExtraSelection1();
+    void updateExtraSelection2();
 
     /**
      * @brief Slot, that will update editor style.
      */
     void updateStyle();
 
-    /**
-     * @brief Slot, that will be called on selection
-     * change.
-     */
-    void onSelectionChanged();
-
-protected:
+  protected:
     /**
      * @brief Method, that's called on any text insertion of
      * mimedata into editor. If it's text - it inserts text
      * as plain text.
      */
-    void insertFromMimeData(const QMimeData* source) override;
+    void insertFromMimeData(const QMimeData *source) override;
 
     /**
      * @brief Method, that's called on editor painting. This
      * method if overloaded for line number area redraw.
      */
-    void paintEvent(QPaintEvent* e) override;
+    void paintEvent(QPaintEvent *e) override;
 
     /**
      * @brief Method, that's called on any widget resize.
      * This method if overloaded for line number area
      * resizing.
      */
-    void resizeEvent(QResizeEvent* e) override;
+    void resizeEvent(QResizeEvent *e) override;
 
     /**
      * @brief Method, that's called on any key press, posted
@@ -176,7 +171,7 @@ public Q_SLOTS:
      * 3. Low indentation
      * 4. Auto parenthesis
      */
-    void keyPressEvent(QKeyEvent* e) override;
+    void keyPressEvent(QKeyEvent *e) override;
 
     /**
      * @brief Method, that's called on focus into widget.
@@ -185,14 +180,7 @@ public Q_SLOTS:
      */
     void focusInEvent(QFocusEvent *e) override;
 
-private:
-
-    /**
-     * @brief Method for initializing document
-     * layout handlers.
-     */
-    void initDocumentLayoutHandlers();
-
+  private:
     /**
      * @brief Method for initializing default
      * monospace font.
@@ -205,12 +193,6 @@ public Q_SLOTS:
      */
     void performConnections();
 
-    /**
-     * @brief Method, that performs selection
-     * frame selection.
-     */
-    void handleSelectionQuery(QTextCursor cursor);
-
     /**
      * @brief Method for updating geometry of line number area.
      */
@@ -223,7 +205,7 @@ public Q_SLOTS:
      * @return Shall event be dropped.
      */
     bool proceedCompleterBegin(QKeyEvent *e);
-    void proceedCompleterEnd(QKeyEvent* e);
+    void proceedCompleterEnd(QKeyEvent *e);
 
     /**
      * @brief Method for getting character under
@@ -243,13 +225,15 @@ public Q_SLOTS:
      * @brief Method, that adds highlighting of
      * currently selected line to extra selection list.
      */
-    void highlightCurrentLine(QList<QTextEdit::ExtraSelection>& extraSelection);
+    void highlightCurrentLine();
 
     /**
      * @brief Method, that adds highlighting of
      * parenthesis if available.
      */
-    void highlightParenthesis(QList<QTextEdit::ExtraSelection>& extraSelection);
+    void highlightParenthesis();
+
+    void highlightOccurrences();
 
     /**
      * @brief Method for getting number of indentation
@@ -258,16 +242,15 @@ public Q_SLOTS:
      */
     int getIndentationSpaces();
 
-    QStyleSyntaxHighlighter* m_highlighter;
-    QSyntaxStyle* m_syntaxStyle;
-    QLineNumberArea* m_lineNumberArea;
-    QCompleter* m_completer;
-
-    QFramedTextAttribute* m_framedAttribute;
+    QStyleSyntaxHighlighter *m_highlighter;
+    QSyntaxStyle *m_syntaxStyle;
+    QLineNumberArea *m_lineNumberArea;
+    QCompleter *m_completer;
 
     bool m_autoIndentation;
     bool m_autoParentheses;
     bool m_replaceTab;
     QString m_tabReplace;
-};
 
+    QList<QTextEdit::ExtraSelection> extra1, extra2;
+};