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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;
using System.Text.RegularExpressions;
using System.Reflection;

namespace System.Drawing.Html
{
    /// <summary>
    /// Represents a block of CSS property values
    /// </summary>
    /// <remarks>
    /// To learn more about CSS blocks visit CSS spec:
    /// http://www.w3.org/TR/CSS21/syndata.html#block
    /// </remarks>
    public class CssBlock
    {
        #region Fields
        private string _block;
        private Dictionary<PropertyInfo, string> _propertyValues;
        private Dictionary<string,string> _properties;

        #endregion

        #region Ctor

        /// <summary>
        /// Initializes internal's
        /// </summary>
        private CssBlock()
        {
            _propertyValues = new Dictionary<PropertyInfo, string>();
            _properties = new Dictionary<string, string>();
        }

        /// <summary>
        /// Creates a new block from the block's source
        /// </summary>
        /// <param name="blockSource"></param>
        public CssBlock(string blockSource)
            : this()
        {
            _block = blockSource;

            //Extract property assignments
            MatchCollection matches = Parser.Match(Parser.CssProperties, blockSource);

            //Scan matches
            foreach (Match match in matches)
            {
                //Split match by colon
                string[] chunks = match.Value.Split(':');

                if (chunks.Length != 2) continue;

                //Extract property name and value
                string propName = chunks[0].Trim();
                string propValue = chunks[1].Trim();
                
                //Remove semicolon
                if (propValue.EndsWith(";")) propValue = propValue.Substring(0, propValue.Length - 1).Trim();

                //Add property to list
                Properties.Add(propName, propValue);

                //Register only if property checks with reflection
                if (CssBox._properties.ContainsKey(propName))
                    PropertyValues.Add(CssBox._properties[propName], propValue);
            }
        }

        #endregion

        #region Props

        /// <summary>
        /// Gets the properties and its values
        /// </summary>
        public Dictionary<string,string> Properties
        {
            get { return _properties; }
        }

        /// <summary>
        /// Gets the dictionary with property-ready values
        /// </summary>
        public Dictionary<PropertyInfo, string> PropertyValues
        {
            get { return _propertyValues; }
        }


        /// <summary>
        /// Gets the block's source
        /// </summary>
        public string BlockSource
        {
            get { return _block; }
        }


        #endregion

        #region Method

        /// <summary>
        /// Updates the PropertyValues dictionary
        /// </summary>
        internal void UpdatePropertyValues()
        {
            PropertyValues.Clear();

            foreach (string prop in Properties.Keys)
            {
                if (CssBox._properties.ContainsKey(prop))
                    PropertyValues.Add(CssBox._properties[prop], Properties[prop]);
            }
        }

        /// <summary>
        /// Asigns the style on this block o the specified box
        /// </summary>
        /// <param name="b"></param>
        public void AssignTo(CssBox b)
        {
            foreach (PropertyInfo prop in PropertyValues.Keys)
            {
                string value = PropertyValues[prop];

                if (value == CssConstants.Inherit && b.ParentBox != null)
                {
                    value = Convert.ToString(prop.GetValue(b.ParentBox, null));
                }

                prop.SetValue(b, value, null);
            }
        }

        #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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