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diff --git a/engines/glk/window_text_grid.h b/engines/glk/window_text_grid.h
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+++ b/engines/glk/window_text_grid.h
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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ */
+
+#ifndef GLK_WINDOW_TEXT_GRID_H
+#define GLK_WINDOW_TEXT_GRID_H
+
+#include "glk/windows.h"
+
+namespace Gargoyle {
+
+/**
+ * Text Grid window
+ */
+class TextGridWindow : public Window {
+	/**
+	 * Structure for a row within the grid window
+	 */
+	struct TextGridRow {
+		Common::Array<uint32> _chars;
+		Common::Array<Attributes> _attrs;
+		bool dirty;
+
+		/**
+		 * Constructor
+		 */
+		TextGridRow() : dirty(false) {}
+
+		/**
+		 * Resize the row
+		 */
+		void resize(size_t newSize);
+	};
+	typedef Common::Array<TextGridRow> TextGridRows;
+private:
+	/**
+	 * Mark a given text row as modified
+	 */
+	void touch(int line);
+
+	/**
+	 * Return or enter, during line input. Ends line input.
+	 */
+	void acceptLine(glui32 keycode);
+public:
+	int _width, _height;
+	TextGridRows _lines;
+
+	int _curX, _curY;    ///< the window cursor position
+
+	///< for line input
+	void *_inBuf;        ///< unsigned char* for latin1, glui32* for unicode
+	int _inOrgX, _inOrgY;
+	int _inMax;
+	int _inCurs, _inLen;
+	Attributes _origAttr;
+	gidispatch_rock_t _inArrayRock;
+	glui32 *_lineTerminators;
+
+	WindowStyle _styles[style_NUMSTYLES]; ///< style hints and settings
+public:
+	/**
+	 * Constructor
+	 */
+	TextGridWindow(Windows *windows, uint32 rock);
+
+	/**
+	 * Destructor
+	 */
+	virtual ~TextGridWindow();
+
+	/**
+	 * Rearranges the window
+	 */
+	virtual void rearrange(const Rect &box) override;
+
+	/**
+	 * Get window split size within parent pair window
+	 */
+	virtual glui32 getSplit(glui32 size, bool vertical) const override;
+
+	/**
+	 * Write a unicode character
+	 */
+	virtual void putCharUni(uint32 ch) override;
+
+	/**
+	 * Unput a unicode character
+	 */
+	virtual bool unputCharUni(uint32 ch) override;
+
+	/**
+	 * Move the cursor
+	 */
+	virtual void moveCursor(const Point &newPos) override;
+
+	/**
+	 * Clear the window
+	 */
+	virtual void clear() override;
+
+	/**
+	 * Click the window
+	 */
+	virtual void click(const Point &newPos) override;
+
+	/**
+	 * Cancel a hyperlink event
+	 */
+	virtual void cancelHyperlinkEvent() override {
+		_hyperRequest = false;
+	}
+
+	/**
+	 * Redraw the window
+	 */
+	virtual void redraw() override;
+
+	virtual void acceptReadLine(glui32 arg) override;
+
+	virtual void acceptReadChar(glui32 arg) override;
+
+	virtual void getSize(glui32 *width, glui32 *height) const override;
+
+	virtual void requestCharEvent() override {
+		_charRequest = true;
+	}
+
+	/**
+	 * Prepare for inputing a line
+	 */
+	virtual void requestLineEvent(char *buf, glui32 maxlen, glui32 initlen) override;
+
+	/**
+	 * Prepare for inputing a line
+	 */
+	virtual void requestLineEventUni(glui32 *buf, glui32 maxlen, glui32 initlen) override;
+
+	/**
+	 * Cancel an input line event
+	 */
+	virtual void cancelLineEvent(Event *ev) override;
+
+	/**
+	 * Cancel a mouse event
+	 */
+	virtual void cancelMouseEvent() override {
+		_mouseRequest = false;
+	}
+
+	virtual void requestCharEventUni() override {
+		_charRequestUni = true;
+	}
+
+	virtual void requestMouseEvent() override {
+		_mouseRequest = true;
+	}
+
+	virtual void requestHyperlinkEvent() override {
+		_hyperRequest = true;
+	}
+
+	virtual void cancelCharEvent() override {
+		_charRequest = _charRequestUni = false;
+	}
+
+	/**
+	 * Returns a pointer to the styles for the window
+	 */
+	virtual const WindowStyle *getStyles() const override {
+		return _styles;
+	}
+};
+
+} // End of namespace Gargoyle
+
+#endif