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diff --git a/src/TextViewLog.hpp b/src/TextViewLog.hpp
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+/* This file is part of Patchage.
+ * Copyright 2007-2020 David Robillard <d@drobilla.net>
+ *
+ * Patchage 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.
+ *
+ * Patchage 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 details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Patchage.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PATCHAGE_TEXTVIEWLOG_HPP
+#define PATCHAGE_TEXTVIEWLOG_HPP
+
+#include "ILog.hpp"
+#include "Widget.hpp"
+
+#include <glibmm/refptr.h>
+#include <gtkmm/texttag.h>
+#include <gtkmm/textview.h>
+
+/// Log that writes colored messages to a Gtk TextView
+class TextViewLog : public ILog
+{
+public:
+	explicit TextViewLog(Widget<Gtk::TextView>& text_view);
+
+	TextViewLog(const TextViewLog&) = delete;
+	TextViewLog& operator=(const TextViewLog&) = delete;
+
+	TextViewLog(TextViewLog&&) = delete;
+	TextViewLog& operator=(TextViewLog&&) = delete;
+
+	~TextViewLog() override = default;
+
+	void info_msg(const std::string& msg) override;
+	void error_msg(const std::string& msg) override;
+	void warning_msg(const std::string& msg) override;
+
+	int min_height() const;
+
+	const Widget<Gtk::TextView>& text_view() const { return _text_view; }
+	Widget<Gtk::TextView>&       text_view() { return _text_view; }
+
+private:
+	Glib::RefPtr<Gtk::TextTag> _error_tag;
+	Glib::RefPtr<Gtk::TextTag> _warning_tag;
+	Widget<Gtk::TextView>&     _text_view;
+};
+
+#endif // PATCHAGE_TEXTVIEWLOG_HPP