TableStyle.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / xsp / System / Web / UI / WebControls / TableStyle.cs / 1 / TableStyle.cs
                        

                        
                            //------------------------------------------------------------------------------ 
// 
//     Copyright (c) Microsoft Corporation.  All rights reserved.
// 
//----------------------------------------------------------------------------- 

namespace System.Web.UI.WebControls { 
 
    using System;
    using System.Collections; 
    using System.ComponentModel;
    using System.Globalization;
    using System.Reflection;
    using System.Web; 
    using System.Web.UI;
    using System.Security.Permissions; 
 

    ///  
    ///    Specifies the style of the table.
    /// 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)]
    [AspNetHostingPermission(SecurityAction.InheritanceDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public class TableStyle : Style {
 
        // The following are marked internal so that WebPartMenuStyle (or other derived types) can access IsSet on them 
        internal const int PROP_BACKIMAGEURL = 0x00010000;
        internal const int PROP_CELLPADDING = 0x00020000; 
        internal const int PROP_CELLSPACING = 0x00040000;
        internal const int PROP_GRIDLINES = 0x00080000;
        internal const int PROP_HORZALIGN = 0x00100000;
 

        ///  
        /// Initializes a new instance of the  class. 
        /// 
        public TableStyle() : base() { 
        }


        ///  
        ///    
        ///       Initializes a new instance of the  class with the 
        ///       specified state bag information. 
        ///    
        ///  
        public TableStyle(StateBag bag) : base(bag) {
        }

 
        /// 
        ///    Gets or sets the URL of the background image for the 
        ///       table. The image will be tiled if it is smaller than the table. 
        /// 
        [ 
        WebCategory("Appearance"),
        DefaultValue(""),
        UrlProperty(),
        WebSysDescription(SR.TableStyle_BackImageUrl), 
        NotifyParentProperty(true)
        ] 
        public virtual string BackImageUrl { 
            get {
                if (IsSet(PROP_BACKIMAGEURL)) { 
                    return(string)(ViewState["BackImageUrl"]);
                }
                return String.Empty;
            } 
            set {
                if (value == null) { 
                    throw new ArgumentNullException("value"); 
                }
                ViewState["BackImageUrl"] = value; 
                SetBit(PROP_BACKIMAGEURL);
            }
        }
 
        /// 
        ///    Gets or sets the distance between the border and the 
        ///       contents of the table cell. 
        /// 
        [ 
        WebCategory("Appearance"),
        DefaultValue(-1),
        WebSysDescription(SR.TableStyle_CellPadding),
        NotifyParentProperty(true) 
        ]
        public virtual int CellPadding { 
            get { 
                if (IsSet(PROP_CELLPADDING)) {
                    return(int)(ViewState["CellPadding"]); 
                }
                return -1;
            }
            set { 
                if (value < -1) {
                    throw new ArgumentOutOfRangeException("value", SR.GetString(SR.TableStyle_InvalidCellPadding)); 
                } 
                ViewState["CellPadding"] = value;
                SetBit(PROP_CELLPADDING); 
            }
        }

 
        /// 
        ///    Gets or sets the distance between table cells. 
        ///  
        [
        WebCategory("Appearance"), 
        DefaultValue(-1),
        WebSysDescription(SR.TableStyle_CellSpacing),
        NotifyParentProperty(true)
        ] 
        public virtual int CellSpacing {
            get { 
                if (IsSet(PROP_CELLSPACING)) { 
                    return(int)(ViewState["CellSpacing"]);
                } 
                return -1;
            }
            set {
                if (value < -1) { 
                    throw new ArgumentOutOfRangeException("value", SR.GetString(SR.TableStyle_InvalidCellSpacing));
                } 
                ViewState["CellSpacing"] = value; 
                SetBit(PROP_CELLSPACING);
            } 
        }


        ///  
        ///    Gets or sets the gridlines property of the table.
        ///  
        [ 
        WebCategory("Appearance"),
        DefaultValue(GridLines.None), 
        WebSysDescription(SR.TableStyle_GridLines),
        NotifyParentProperty(true)
        ]
        public virtual GridLines GridLines { 
            get {
                if (IsSet(PROP_GRIDLINES)) { 
                    return(GridLines)(ViewState["GridLines"]); 
                }
                return GridLines.None; 
            }
            set {
                if (value < GridLines.None || value > GridLines.Both) {
                    throw new ArgumentOutOfRangeException("value"); 
                }
                ViewState["GridLines"] = value; 
                SetBit(PROP_GRIDLINES); 
            }
        } 


        /// 
        ///    Gets or sets the horizontal alignment of the table within the page. 
        /// 
        [ 
        WebCategory("Layout"), 
        DefaultValue(HorizontalAlign.NotSet),
        WebSysDescription(SR.TableStyle_HorizontalAlign), 
        NotifyParentProperty(true)
        ]
        public virtual HorizontalAlign HorizontalAlign {
            get { 
                if (IsSet(PROP_HORZALIGN)) {
                    return(HorizontalAlign)(ViewState["HorizontalAlign"]); 
                } 
                return HorizontalAlign.NotSet;
            } 
            set {
                if (value < HorizontalAlign.NotSet || value > HorizontalAlign.Justify) {
                    throw new ArgumentOutOfRangeException("value");
                } 
                ViewState["HorizontalAlign"] = value;
                SetBit(PROP_HORZALIGN); 
            } 
        }
 

        /// 
        /// 
        ///     Adds information about the background 
        ///       image, callspacing, cellpadding, gridlines, and alignment to the list of attributes
        ///       to render. 
        ///  
        public override void AddAttributesToRender(HtmlTextWriter writer, WebControl owner) {
            base.AddAttributesToRender(writer, owner); 

            int n = CellSpacing;
            if (n >= 0) {
                writer.AddAttribute(HtmlTextWriterAttribute.Cellspacing, n.ToString(NumberFormatInfo.InvariantInfo)); 
                if (n == 0) {
                    writer.AddStyleAttribute(HtmlTextWriterStyle.BorderCollapse, "collapse"); 
                } 
            }
 
            n = CellPadding;
            if (n >= 0) {
                writer.AddAttribute(HtmlTextWriterAttribute.Cellpadding, n.ToString(NumberFormatInfo.InvariantInfo));
            } 

            HorizontalAlign align = HorizontalAlign; 
            if (align != HorizontalAlign.NotSet) { 
                string alignValue = "Justify";
 
                switch (align) {
                    case HorizontalAlign.Left:
                        alignValue = "Left";
                        break; 
                    case HorizontalAlign.Center:
                        alignValue = "Center"; 
                        break; 
                    case HorizontalAlign.Right:
                        alignValue = "Right"; 
                        break;
                    case HorizontalAlign.Justify:
                        alignValue = "Justify";
                        break; 
                }
                writer.AddAttribute(HtmlTextWriterAttribute.Align, alignValue); 
            } 

            GridLines gridLines = GridLines; 
            if (gridLines != GridLines.None) {
                string rules = String.Empty;
                switch (GridLines) {
                    case GridLines.Both: 
                        rules = "all";
                        break; 
                    case GridLines.Horizontal: 
                        rules = "rows";
                        break; 
                    case GridLines.Vertical:
                        rules = "cols";
                        break;
                } 
                writer.AddAttribute(HtmlTextWriterAttribute.Rules, rules);
            } 
        } 

 
        /// 
        /// 
        ///    Copies non-blank elements from the specified style, overwriting existing
        ///       style elements if necessary. 
        /// 
        public override void CopyFrom(Style s) { 
            if (s != null && !s.IsEmpty) { 
                base.CopyFrom(s);
 
                TableStyle ts = s as TableStyle;
                if (ts != null) {

                    // Only copy the BackImageUrl if it isn't in the source Style's registered CSS class 
                    if (s.RegisteredCssClass.Length != 0) {
                        if (ts.IsSet(PROP_BACKIMAGEURL)) { 
                            ViewState.Remove("BackImageUrl"); 
                            ClearBit(PROP_BACKIMAGEURL);
                        } 
                    }
                    else {
                        if (ts.IsSet(PROP_BACKIMAGEURL))
                            this.BackImageUrl = ts.BackImageUrl; 
                    }
 
                    if (ts.IsSet(PROP_CELLPADDING)) 
                        this.CellPadding = ts.CellPadding;
                    if (ts.IsSet(PROP_CELLSPACING)) 
                        this.CellSpacing = ts.CellSpacing;
                    if (ts.IsSet(PROP_GRIDLINES))
                        this.GridLines = ts.GridLines;
                    if (ts.IsSet(PROP_HORZALIGN)) 
                        this.HorizontalAlign = ts.HorizontalAlign;
                } 
            } 
        }
 

        /// 
        protected override void FillStyleAttributes(CssStyleCollection attributes, IUrlResolutionService urlResolver) {
            base.FillStyleAttributes(attributes, urlResolver); 

            string s = BackImageUrl; 
            if (s.Length != 0) { 
                if (urlResolver != null) {
                    s = urlResolver.ResolveClientUrl(s); 
                }
                attributes.Add(HtmlTextWriterStyle.BackgroundImage, s);
            }
        } 

 
        ///  
        /// 
        ///    Copies non-blank elements from the specified style, but will not overwrite 
        ///       any existing style elements.
        /// 
        public override void MergeWith(Style s) {
            if (s != null && !s.IsEmpty) { 
                if (IsEmpty) {
                    // merge into an empty style is equivalent to a copy, 
                    // which is more efficient 
                    CopyFrom(s);
                    return; 
                }

                base.MergeWith(s);
 
                TableStyle ts = s as TableStyle;
                if (ts != null) { 
 
                    // Since we're already copying the registered CSS class in base.MergeWith, we don't
                    // need to any attributes that would be included in that class. 
                    if (s.RegisteredCssClass.Length == 0) {
                        if (ts.IsSet(PROP_BACKIMAGEURL) && !this.IsSet(PROP_BACKIMAGEURL))
                            this.BackImageUrl = ts.BackImageUrl;
                    } 

                    if (ts.IsSet(PROP_CELLPADDING) && !this.IsSet(PROP_CELLPADDING)) 
                        this.CellPadding = ts.CellPadding; 
                    if (ts.IsSet(PROP_CELLSPACING) && !this.IsSet(PROP_CELLSPACING))
                        this.CellSpacing = ts.CellSpacing; 
                    if (ts.IsSet(PROP_GRIDLINES) && !this.IsSet(PROP_GRIDLINES))
                        this.GridLines = ts.GridLines;
                    if (ts.IsSet(PROP_HORZALIGN) && !this.IsSet(PROP_HORZALIGN))
                        this.HorizontalAlign = ts.HorizontalAlign; 
                }
            } 
        } 

 
        /// 
        /// 
        ///    Clears out any defined style elements from the state bag.
        ///  
        public override void Reset() {
            if (IsSet(PROP_BACKIMAGEURL)) 
                ViewState.Remove("BackImageUrl"); 
            if (IsSet(PROP_CELLPADDING))
                ViewState.Remove("CellPadding"); 
            if (IsSet(PROP_CELLSPACING))
                ViewState.Remove("CellSpacing");
            if (IsSet(PROP_GRIDLINES))
                ViewState.Remove("GridLines"); 
            if (IsSet(PROP_HORZALIGN))
                ViewState.Remove("HorizontalAlign"); 
 
            base.Reset();
        } 
    }
}

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