MenuItemStyle.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 / MenuItemStyle.cs / 2 / MenuItemStyle.cs
                        

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

namespace System.Web.UI.WebControls { 
    using System.ComponentModel; 
    using System.Drawing;
    using System.Globalization; 
    using System.Text;
    using System.Web.UI;
    using System.Security.Permissions;
 

    ///  
    ///    Specifies the style of a MenuItem. 
    /// 
    [AspNetHostingPermission(SecurityAction.LinkDemand, Level=AspNetHostingPermissionLevel.Minimal)] 
    public sealed class MenuItemStyle : Style {
        private const int PROP_VPADDING = 0x00010000;
        private const int PROP_HPADDING = 0x00020000;
        private const int PROP_ITEMSPACING = 0x00040000; 

        private HyperLinkStyle _hyperLinkStyle; 
 
        public MenuItemStyle() : base() {
        } 

        public MenuItemStyle(StateBag bag) : base(bag) {
        }
 
        /// 
        /// Gets and sets the horizontal padding around the node text 
        ///  
        [
        DefaultValue(typeof(Unit), ""), 
        WebCategory("Layout"),
        NotifyParentProperty(true),
        WebSysDescription(SR.MenuItemStyle_HorizontalPadding)
        ] 
        public Unit HorizontalPadding {
            get { 
                if (IsSet(PROP_HPADDING)) { 
                    return (Unit)(ViewState["HorizontalPadding"]);
                } 
                return Unit.Empty;
            }
            set {
                if ((value.Type == UnitType.Percentage) || (value.Value < 0)) { 
                    throw new ArgumentOutOfRangeException("value");
                } 
                ViewState["HorizontalPadding"] = value; 
                SetBit(PROP_HPADDING);
            } 
        }

        internal HyperLinkStyle HyperLinkStyle {
            get { 
                if (_hyperLinkStyle == null) {
                    _hyperLinkStyle = new HyperLinkStyle(this); 
                } 

                return _hyperLinkStyle; 
            }
        }

 
        /// 
        /// Gets and sets the vertical spacing between nodes 
        ///  
        [
        DefaultValue(typeof(Unit), ""), 
        WebCategory("Layout"),
        NotifyParentProperty(true),
        WebSysDescription(SR.MenuItemStyle_ItemSpacing)
        ] 
        public Unit ItemSpacing {
            get { 
                if (IsSet(PROP_ITEMSPACING)) { 
                    return (Unit)(ViewState["ItemSpacing"]);
                } 
                return Unit.Empty;
            }
            set {
                if ((value.Type == UnitType.Percentage) || (value.Value < 0)) { 
                    throw new ArgumentOutOfRangeException("value");
                } 
                ViewState["ItemSpacing"] = value; 
                SetBit(PROP_ITEMSPACING);
            } 
        }


        ///  
        /// Gets and sets the vertical padding around the node text
        ///  
        [ 
        DefaultValue(typeof(Unit), ""),
        WebCategory("Layout"), 
        NotifyParentProperty(true),
        WebSysDescription(SR.MenuItemStyle_VerticalPadding)
        ]
        public Unit VerticalPadding { 
            get {
                if (IsSet(PROP_VPADDING)) { 
                    return (Unit)(ViewState["VerticalPadding"]); 
                }
                return Unit.Empty; 
            }
            set {
                if ((value.Type == UnitType.Percentage) || (value.Value < 0)) {
                    throw new ArgumentOutOfRangeException("value"); 
                }
                ViewState["VerticalPadding"] = value; 
                SetBit(PROP_VPADDING); 
            }
        } 


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

                MenuItemStyle mis = s as MenuItemStyle;
                if (mis != null && !mis.IsEmpty) {
                    // Only copy the Css attributes if they aren't included in the source Style's registered CSS class 
                    if (s.RegisteredCssClass.Length != 0) {
                        if (mis.IsSet(PROP_VPADDING)) { 
                            ViewState.Remove("VerticalPadding"); 
                            ClearBit(PROP_VPADDING);
                        } 

                        if (mis.IsSet(PROP_HPADDING)) {
                            ViewState.Remove("HorizontalPadding");
                            ClearBit(PROP_HPADDING); 
                        }
                    } 
                    else { 
                        if (mis.IsSet(PROP_VPADDING)) {
                            this.VerticalPadding = mis.VerticalPadding; 
                        }

                        if (mis.IsSet(PROP_HPADDING)) {
                            this.HorizontalPadding = mis.HorizontalPadding; 
                        }
                    } 
 
                    // Item spacing is not rendered in the registered css, so we always copy it
                    if (mis.IsSet(PROP_ITEMSPACING)) { 
                        this.ItemSpacing = mis.ItemSpacing;
                    }
                }
            } 
        }
 
 
        protected override void FillStyleAttributes(CssStyleCollection attributes, IUrlResolutionService urlResolver) {
            // The main style will be rendered on the container element, that does not contain the text. 
            // The Hyperlink style will render the text styles
            // Copying the code from the base class, except for the part that deals with Font and ForeColor.
            StateBag viewState = ViewState;
            Color c; 

            // BackColor 
            if (IsSet(PROP_BACKCOLOR)) { 
                c = (Color)viewState["BackColor"];
                if (!c.IsEmpty) { 
                    attributes.Add(HtmlTextWriterStyle.BackgroundColor, ColorTranslator.ToHtml(c));
                }
            }
 
            // BorderColor
            if (IsSet(PROP_BORDERCOLOR)) { 
                c = (Color)viewState["BorderColor"]; 
                if (!c.IsEmpty) {
                    attributes.Add(HtmlTextWriterStyle.BorderColor, ColorTranslator.ToHtml(c)); 
                }
            }

            BorderStyle bs = this.BorderStyle; 
            Unit bu = this.BorderWidth;
            if (!bu.IsEmpty) { 
                attributes.Add(HtmlTextWriterStyle.BorderWidth, bu.ToString(CultureInfo.InvariantCulture)); 
                if (bs == BorderStyle.NotSet) {
                    if (bu.Value != 0.0) { 
                        attributes.Add(HtmlTextWriterStyle.BorderStyle, "solid");
                    }
                }
                else { 
                    attributes.Add(HtmlTextWriterStyle.BorderStyle, borderStyles[(int)bs]);
                } 
            } 
            else {
                if (bs != BorderStyle.NotSet) { 
                    attributes.Add(HtmlTextWriterStyle.BorderStyle, borderStyles[(int)bs]);
                }
            }
 
            Unit u;
 
            // Height 
            if (IsSet(PROP_HEIGHT)) {
                u = (Unit)viewState["Height"]; 
                if (!u.IsEmpty) {
                    attributes.Add(HtmlTextWriterStyle.Height, u.ToString(CultureInfo.InvariantCulture));
                }
            } 

            // Width 
            if (IsSet(PROP_WIDTH)) { 
                u = (Unit)viewState["Width"];
                if (!u.IsEmpty) { 
                    attributes.Add(HtmlTextWriterStyle.Width, u.ToString(CultureInfo.InvariantCulture));
                }
            }
 
            if (!HorizontalPadding.IsEmpty || !VerticalPadding.IsEmpty) {
                // DevDiv Bugs 84107: Must pass InvariantCulture to Unit.ToString since Unit is not IFormattable. 
                Unit verticalPadding = VerticalPadding.IsEmpty ? Unit.Pixel(0) : VerticalPadding; 
                Unit horizontalPadding = HorizontalPadding.IsEmpty ? Unit.Pixel(0) : HorizontalPadding;
                attributes.Add(HtmlTextWriterStyle.Padding, string.Format(CultureInfo.InvariantCulture, 
                    "{0} {1} {0} {1}",
                    verticalPadding.ToString(CultureInfo.InvariantCulture),
                    horizontalPadding.ToString(CultureInfo.InvariantCulture)));
            } 
        }
 
        public override void MergeWith(Style s) { 
            if (s != null) {
                if (IsEmpty) { 
                    // Merging with an empty style is equivalent to copying,
                    // which is more efficient.
                    CopyFrom(s);
                    return; 
                }
 
                base.MergeWith(s); 

                MenuItemStyle mis = s as MenuItemStyle; 
                if (mis != null && !mis.IsEmpty) {
                    // 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 (mis.IsSet(PROP_VPADDING) && !this.IsSet(PROP_VPADDING)) {
                            this.VerticalPadding = mis.VerticalPadding; 
                        } 

                        if (mis.IsSet(PROP_HPADDING) && !this.IsSet(PROP_HPADDING)) { 
                            this.HorizontalPadding = mis.HorizontalPadding;
                        }
                    }
 
                    if (mis.IsSet(PROP_ITEMSPACING) && !this.IsSet(PROP_ITEMSPACING)) {
                        this.ItemSpacing = mis.ItemSpacing; 
                    } 
                }
            } 
        }


        ///  
        ///    Clears out any defined style elements from the state bag.
        ///  
        public override void Reset() { 
            if (IsSet(PROP_VPADDING))
                ViewState.Remove("VerticalPadding"); 
            if (IsSet(PROP_HPADDING))
                ViewState.Remove("HorizontalPadding");
            if (IsSet(PROP_ITEMSPACING))
                ViewState.Remove("ItemSpacing"); 
            ResetCachedStyles();
 
            base.Reset(); 
        }
 
        internal void ResetCachedStyles() {
            _hyperLinkStyle = null;
        }
    } 
}

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