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A Professional HTML Renderer You Will Use

, 29 Jan 2009 BSD
100% managed code that draws HTML on any device
HtmlDemo.002.zip
System.Drawing.Html.dll
Html Demo.exe
HtmlDemo.zip
System.Drawing.Html.dll
Html Demo.exe
System.Drawing.Html.002.zip
System.Drawing.Html
Html Demo
bin
Debug
Html Demo.exe
Html Demo.vshost.exe
HtmlDemo.zip
System.Drawing.Html.dll
Html Demo.csproj.user
Properties
Settings.settings
Resources
comment16.gif
delete16.gif
delete32.gif
exclamation32.png
favorites32.png
font32.png
formula32.png
image32.png
method16.gif
paly32.png
property16.gif
property32.png
refreshdocument32.png
web_pallete.gif
Window.gif
Samples
System.Drawing.Html.suo
System.Drawing.Html
bin
Debug
System.Drawing.Html.dll
System.Drawing.Html.vshost.exe
Properties
Settings.settings
System.Drawing.Html.zip
Html Demo.exe
Html Demo.vshost.exe
System.Drawing.Html.dll
Html Demo.csproj.user
Settings.settings
comment16.gif
delete16.gif
delete32.gif
exclamation32.png
favorites32.png
font32.png
formula32.png
image32.png
method16.gif
paly32.png
property16.gif
property32.png
refreshdocument32.png
web_pallete.gif
Window.gif
System.Drawing.Html.suo
System.Drawing.Html.dll
System.Drawing.Html.vshost.exe
Settings.settings
using System;
using System.Collections.Generic;
using System.Text;

namespace System.Drawing.Html
{
    /// <summary>
    /// Splits text on words for a box
    /// </summary>
    internal class CssBoxWordSplitter
    {
        #region Static

        /// <summary>
        /// Returns a bool indicating if the specified box white-space processing model specifies
        /// that sequences of white spaces should be collapsed on a single whitespace
        /// </summary>
        /// <param name="b"></param>
        /// <returns></returns>
        public static bool CollapsesWhiteSpaces(CssBox b)
        {
            return b.WhiteSpace == CssConstants.Normal ||
                b.WhiteSpace == CssConstants.Nowrap ||
                b.WhiteSpace == CssConstants.PreLine;
        }

        /// <summary>
        /// Returns a bool indicating if line breaks at the source should be eliminated
        /// </summary>
        /// <param name="b"></param>
        /// <returns></returns>
        public static bool EliminatesLineBreaks(CssBox b)
        {
            return b.WhiteSpace == CssConstants.Normal || b.WhiteSpace == CssConstants.Nowrap;
        }

        #endregion

        #region Fields
        private CssBox _box;
        private string _text;
        private List<CssBoxWord> _words;
        private CssBoxWord _curword;

        #endregion

        #region Ctor

        private CssBoxWordSplitter()
        {
            _words = new List<CssBoxWord>();
            _curword = null;
        }

        public CssBoxWordSplitter(CssBox box, string text)
            : this()
        {
            _box = box;
            _text = text.Replace("\r", string.Empty); ;
        }

        #endregion

        #region Props


        public List<CssBoxWord> Words
        {
            get { return _words; }
        }


        public string Text
        {
            get { return _text; }
        }


        public CssBox Box
        {
            get { return _box; }
        }


        #endregion

        #region Public Metods

        /// <summary>
        /// Splits the text on words using rules of the specified box
        /// </summary>
        /// <param name="text"></param>
        /// <returns></returns>
        public void SplitWords()
        {

            if (string.IsNullOrEmpty(Text)) return;

            _curword = new CssBoxWord(Box);

            bool onspace = IsSpace(Text[0]);

            for (int i = 0; i < Text.Length; i++)
            {
                if (IsSpace(Text[i]))
                {
                    if (!onspace) CutWord();

                    if (IsLineBreak(Text[i]))
                    {
                        _curword.AppendChar('\n');
                        CutWord();
                    }
                    else if (IsTab(Text[i]))
                    {
                        _curword.AppendChar('\t');
                        CutWord();
                    }
                    else
                    {
                        _curword.AppendChar(' ');
                    }

                    onspace = true;
                }
                else
                {
                    if (onspace) CutWord();
                    _curword.AppendChar(Text[i]);

                    onspace = false;
                }
            }

            CutWord();
        }

        private void CutWord()
        {
            if(_curword.Text.Length > 0)
                Words.Add(_curword);
            _curword = new CssBoxWord(Box);
        }

        private bool IsSpace(char c)
        {
            return c == ' ' || c == '\t' || c == '\n';
        }

        private bool IsLineBreak(char c)
        {
            return c == '\n' || c == '\a';
        }

        private bool IsTab(char c)
        {
            return c == '\t';
        }

        #endregion
    }

}

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License

This article, along with any associated source code and files, is licensed under The BSD License

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About the Author

Jose Menendez Póo
Team Leader
Mexico Mexico
I'm in game programming now: https://itunes.apple.com/us/app/ugly-aliens-training-center/id859271884?ls=1&mt=8
 
Jose Manuel Menéndez Poó
 
- I've been programming Windows and Web apps since 1997.
- My greatest concern nowadays is user interface usability.
 
Questions and stuff by twitter: @menendezpoo
 
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