/* 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef GRAPHICS_MACGUI_MACWINDOWBORDER_H
#define GRAPHICS_MACGUI_MACWINDOWBORDER_H

#include "common/str.h"
#include "common/list.h"

#include "graphics/managed_surface.h"
#include "graphics/transparent_surface.h"
#include "graphics/primitives.h"

#include "image/bmp.h"

namespace Graphics {

class MacWindow;
class MacWindowManager;
class NinePatchBitmap;

enum {
	kWindowBorderActive    = 1 << 0,
	kWindowBorderTitle     = 1 << 1,
	kWindowBorderScrollbar = 1 << 2,

	kWindowBorderMaxFlag   = 1 << 3
};

struct BorderOffsets {
	int left;
	int right;
	int top;
	int bottom;
	int titleTop;
	int titleBottom;
	bool dark;
	int titlePos;
	int upperScrollHeight;
	int lowerScrollHeight;
};

/**
 * A representation of a custom border, which allows for arbitrary border offsets
 * and nine-patch resizable displays for both active and inactive states.
 * However, the border offsets are the same for both active and inactive states.
 */
class MacWindowBorder {
public:
	MacWindowBorder();
	~MacWindowBorder();

	/**
	 * Accessor to check whether or not a border is loaded.
	 * @param check whether the border type we want has been initialized.
	 * @return True if the checked state has a border loaded, false otherwise.
	 */
	bool hasBorder(uint32 flags);

	/**
	 * Add the given surface as the display of the border in the state that is instructed by flag.
	 * Will fail if there is already an border.
	 * @param The surface that will be displayed.
	 * @param The border type indicated by flag
	 * @param The title position of bmp image
	 */
	void addBorder(TransparentSurface *source, uint32 flags, int titlePos = 0);

	/**
	 * Accessor function for the custom offsets.
	 * @return True if custom offsets have been indicated (setOffsets has been called previously).
	 */
	bool hasOffsets() const;

	/**
	 * Mutator method to indicate the custom border offsets.
	 * These should be set to the desired thickness of each side of the border.
	 * e.g. For a border that is 10 pixels wide and 5 pixels tall, the call should be:
	 * setOffsets(10, 10, 5, 5)
	 * Note that this function does not check whether those borders form
	 * a valid rect when combined with the window dimensions.
	 * @param left Thickness (in pixels) of the left side of the border.
	 * @param right Thickness (in pixels) of the right side of the border.
	 * @param top Thickness (in pixels) of the top side of the border.
	 * @param bottom Thickness (in pixels) of the bottom side of the border.
	 */
	void setOffsets(int left, int right, int top, int bottom);
	void setOffsets(Common::Rect &rect);
	void setOffsets(const BorderOffsets &offsets);

	/**
	 * Accessor method to retrieve a given border.
	 * Note that it does not check for validity, and thus if setOffsets
	 * was not called before it might return garbage.
	 * @param offset The identifier of the offset wanted.
	 * @return The desired offset in pixels.
	 */
	BorderOffsets &getOffset();
	const BorderOffsets &getOffset() const;

	/**
	 * Blit the desired border (active or inactive) into a destination surface.
	 * It automatically resizes the border to fit the given surface.
	 * @param destination The surface we want to blit into.
	 * @param border type that you want to draw
	 * @param wm The window manager.
	 */
	void blitBorderInto(ManagedSurface &destination, uint32 flags, MacWindowManager *wm);

	void setTitle(const Common::String& title, int width, MacWindowManager *wm);

	void setScroll(int scrollPos, int scrollSize) { _scrollPos = scrollPos, _scrollSize = scrollSize; }

	void drawTitle(ManagedSurface *g, MacWindowManager *wm, int titleOffset);

	void drawScrollBar(ManagedSurface *g, MacWindowManager *wm);

	// we should call this method as soon as the macwindowborder is constructed
	void setWindow(MacWindow *window) { _window = window; }

	void setBorderType(int type);

	void disableBorder();

	void loadBorder(Common::SeekableReadStream &file, uint32 flags, int lo = -1, int ro = -1, int to = -1, int bo = -1);
	void loadBorder(Common::SeekableReadStream &file, uint32 flags, BorderOffsets offsets);
	void loadInternalBorder(uint32 flags);

	void setBorder(Graphics::TransparentSurface *surface, uint32 flags, int lo = -1, int ro = -1, int to = -1, int bo = -1);
	void setBorder(Graphics::TransparentSurface *surface, uint32 flags, BorderOffsets offsets);
private:
	int _scrollPos, _scrollSize;
	Common::String _title;

	Common::Array<NinePatchBitmap *> _border;

	MacWindow *_window;

	BorderOffsets _borderOffsets;

	bool _useInternalBorder;

	int _borderType;
};

} // End of namespace Graphics
#endif
