LogView fixes and optimizations

qad/application/logview.h

@@ -28,6 +28,7 @@
 #include "qad_export.h"
 
 class QTextEdit;
+class QTextBlock;
 class QAction;
 
 namespace Ui {
@@ -58,10 +59,13 @@ public:
 						  bool bold = false);
 
 	void registerCategory(const QString & label,
-						  QRegularExpression regexp = QRegularExpression(),
+						  QRegularExpression regexp,
 						  const QImage & icon = QImage(),
 						  QColor color = QColor(),
 						  bool bold = false);
+	void removeCategory(QString keyword);
+	void removeCategory(QRegularExpression regexp);
+	void clearCategories();
 
 	void addText(const QString & text, bool insert_newline = true);
 	
@@ -81,6 +85,7 @@ private:
 	void changeEvent(QEvent * e);
 	void newLine();
 	QSize iconImageSize();
+	void filterBlock(QTextBlock block, const QString & fs, const QRegularExpression & regexp);
 	
 	Ui::LogView * ui;
 	QList<Category> categories;
@@ -93,6 +98,7 @@ public slots:
 	void clear();
 	
 private slots:
+	void scrollToBottom();
 	void filter();
 	
 signals: