/*

    ......... 2015 Ivan Mahonin

    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/>.

*/

using System;

using System.Collections.Generic;

using System.Data.Linq;

using System.Drawing;

namespace Diagram {

    public class TextUtils {

        static Bitmap tmpBitmap = new Bitmap(10, 10);

        static Graphics tmpGraphics = Graphics.FromImage(tmpBitmap);

        public static string wrap(string text, double width, Font font) {

            string wrapped = "";

            string line = "";

            int wordStart = 0;

            for(int i = 0; i <= text.Length; ++i) {

                char c = i < text.Length ? text[i] : ' ';

                if (char.IsWhiteSpace(c)) {

                    bool newLine = c == '\n';

                    string word = text.Substring(wordStart, i - wordStart);

                    if (word != "") {

                        if (line == "") {

                            line = word;

                            word = "";

                        } else

                        if (tmpGraphics.MeasureString(line, font).Width <= width) {

                            line += " " + word;

                            word = "";

                        } else {

                            newLine = true;

                        }

                    }

                    if (newLine) {

                        if (wrapped != "") wrapped += "\r\n";

                        wrapped += line;

                        line = word;

                    }

                    wordStart = i + 1;

                }

            }

            if (line != "") {

                if (wrapped != "") wrapped += "\r\n";

                wrapped += line;

            }

            return wrapped;

        }

        public static SizeF measure(string text, Font font) {

            return tmpGraphics.MeasureString(text, font);

        }

    }

}