/***************************************************************************
 *   Copyright (C) 2004 by Christoph Freundl                               *
 *   Christoph.Freundl@informatik.uni-erlangen.de                          *
 *                                                                         *
 *   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.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

#include "textarea.h"
#include "fontfactory.h"

namespace SDLwidgets {

TextArea::TextArea( int width, int height ) {
	_width = width;
	_min_width = width;
	_height = height;
	_min_height = height;

	// default color for a text label is white
	_color.r = 255;
	_color.g = 255;
	_color.b = 255;
	
	_font = FontFactory::getInstance()->createFont( "tahoma.ttf", 12 );
}

TextArea::~TextArea() {
}

void TextArea::setFont( std::string fontName, int fontSize ) {
	_font = FontFactory::getInstance()->createFont( fontName, fontSize );
/*	renderText();*/
}

void TextArea::draw( SDL_Surface* surface ) {
	SDL_Rect srcRect, destRect;
	Sint16 offset_x, offset_y;
	getOffset( offset_x, offset_y );

	int maxHeight = TTF_FontHeight( _font );
	if ( _line.size() * ( maxHeight + 1 ) > _height ) {
		destRect.x = offset_x;
		destRect.y = offset_y + _height - maxHeight;
		srcRect.x = 0;
		srcRect.y = 0;
		srcRect.w = _width;
		srcRect.h = maxHeight;
		for ( std::vector<std::string>::reverse_iterator it = _line.rbegin();
				it != _line.rend() && destRect.y >= offset_y; it++, destRect.y -= maxHeight + 1 ) {
			SDL_Surface* textSurface =
				TTF_RenderUTF8_Blended( _font, it->c_str(), _color );
			SDL_BlitSurface( textSurface, &srcRect, surface, &destRect );
			SDL_FreeSurface( textSurface );
		}
	}
	else {
		destRect.x = offset_x;
		destRect.y = offset_y;
		srcRect.x = 0;
		srcRect.y = 0;
		srcRect.w = _width;
		srcRect.h = maxHeight;
		for ( std::vector<std::string>::iterator it = _line.begin();
				it != _line.end() && destRect.y >= offset_y; it++, destRect.y += maxHeight + 1 ) {
			SDL_Surface* textSurface =
				TTF_RenderUTF8_Blended( _font, it->c_str(), _color );
			SDL_BlitSurface( textSurface, &srcRect, surface, &destRect );
			SDL_FreeSurface( textSurface );
		}
	}
}

void TextArea::appendText( std::string text ) {
	// wrap text in separate lines
	std::string line;
	int lineWidth = 0, lineHeight = 0;
	
	while ( text.length() > 0 ) {
		unsigned int pos = text.find( ' ', 1 );
		if ( pos < text.length() ) {
			std::string word = text.substr( 0, pos );
			text.erase( 0, pos );
			int width, height;
			TTF_SizeUTF8( _font, word.c_str(), &width, &height );
			if ( lineWidth + width > _width ) {
				appendLine( line );
				line = word;
				while ( line[0] == ' ' )
					line.erase( 0, 1 );
				TTF_SizeUTF8( _font, line.c_str(), &lineWidth, &lineHeight );
			}
			else {
				line += word;
				lineWidth += width;
			}
		}
		else {
			int width, height;
			TTF_SizeUTF8( _font, text.c_str(), &width, &height );
			if ( lineWidth + width > _width ) {
				appendLine( line );
				while ( text[0] == ' ' )
					text.erase( 0, 1 );
				appendLine( text );
				text.erase();
			}
			else {
				line += text;
				appendLine( line );
				text.erase();
			}
		}
	}
}

}