477 lines
13 KiB
C#
477 lines
13 KiB
C#
//
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// System.Web.UI.WebControls.CheckBox.cs
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//
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// Author:
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// Dick Porter <dick@ximian.com>
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//
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// Copyright (C) 2005-2010 Novell, Inc (http://www.novell.com)
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//
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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using System.Collections;
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using System.Collections.Specialized;
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using System.ComponentModel;
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using System.Globalization;
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using System.Security.Permissions;
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using System.Web.Util;
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namespace System.Web.UI.WebControls
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{
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// CAS
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[AspNetHostingPermissionAttribute (SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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[AspNetHostingPermissionAttribute (SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
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// attributes
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[Designer ("System.Web.UI.Design.WebControls.CheckBoxDesigner, " + Consts.AssemblySystem_Design, "System.ComponentModel.Design.IDesigner")]
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[DataBindingHandler ("System.Web.UI.Design.TextDataBindingHandler, " + Consts.AssemblySystem_Design)]
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[DefaultEvent ("CheckedChanged")]
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[DefaultProperty ("Text")]
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[ControlValueProperty ("Checked", null)]
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[SupportsEventValidation]
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public class CheckBox : WebControl, IPostBackDataHandler, ICheckBoxControl
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{
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string render_type;
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AttributeCollection common_attrs;
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AttributeCollection inputAttributes;
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StateBag inputAttributesState;
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AttributeCollection labelAttributes;
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StateBag labelAttributesState;
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public CheckBox () : base (HtmlTextWriterTag.Input)
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{
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render_type = "checkbox";
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}
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internal CheckBox (string render_type) : base (HtmlTextWriterTag.Input)
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{
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this.render_type = render_type;
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}
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[DefaultValue (false)]
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[Themeable (false)]
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[WebSysDescription ("")]
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[WebCategory ("Behavior")]
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public virtual bool AutoPostBack {
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get { return (ViewState.GetBool ("AutoPostBack", false)); }
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set { ViewState["AutoPostBack"] = value; }
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}
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[DefaultValue (false)]
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[Themeable (false)]
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[WebSysDescription ("")]
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[WebCategory ("Behavior")]
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public virtual bool CausesValidation {
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get { return ViewState.GetBool ("CausesValidation", false); }
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set { ViewState ["CausesValidation"] = value; }
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}
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[DefaultValue (false)]
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[Bindable (true, BindingDirection.TwoWay)]
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[Themeable (false)]
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[WebSysDescription ("")]
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[WebCategory ("Behavior")]
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public virtual bool Checked {
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get { return (ViewState.GetBool ("Checked", false)); }
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set { ViewState["Checked"] = value; }
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}
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[Browsable (false)]
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[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
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public AttributeCollection InputAttributes {
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get {
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if (inputAttributes == null) {
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if (inputAttributesState == null) {
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inputAttributesState = new StateBag (true);
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if (IsTrackingViewState)
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inputAttributesState.TrackViewState();
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}
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inputAttributes = new AttributeCollection (inputAttributesState);
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}
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return inputAttributes;
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}
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}
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[Browsable (false)]
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[DesignerSerializationVisibility (DesignerSerializationVisibility.Hidden)]
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public AttributeCollection LabelAttributes {
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get {
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if (labelAttributes == null) {
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if (labelAttributesState == null) {
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labelAttributesState = new StateBag (true);
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if (IsTrackingViewState)
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labelAttributesState.TrackViewState();
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}
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labelAttributes = new AttributeCollection (labelAttributesState);
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}
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return labelAttributes;
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}
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}
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[DefaultValue ("")]
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[Bindable (true)]
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[Localizable (true)]
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[WebSysDescription ("")]
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[WebCategory ("Appearance")]
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public virtual string Text {
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get { return (ViewState.GetString ("Text", String.Empty)); }
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set { ViewState["Text"] = value; }
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}
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[DefaultValue (TextAlign.Right)]
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[WebSysDescription ("")]
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[WebCategory ("Appearance")]
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public virtual TextAlign TextAlign {
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get { return (TextAlign) ViewState.GetInt ("TextAlign", (int)TextAlign.Right); }
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set {
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if (value != TextAlign.Left &&
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value != TextAlign.Right) {
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throw new ArgumentOutOfRangeException ("value");
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}
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ViewState["TextAlign"] = value;
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}
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}
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[Themeable (false)]
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[DefaultValue ("")]
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[WebSysDescription ("")]
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[WebCategoryAttribute ("Behavior")]
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public virtual string ValidationGroup {
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get { return ViewState.GetString ("ValidationGroup", String.Empty); }
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set { ViewState["ValidationGroup"] = value; }
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}
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static readonly object EventCheckedChanged = new object ();
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[WebSysDescription ("")]
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[WebCategory ("Action")]
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public event EventHandler CheckedChanged {
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add { Events.AddHandler (EventCheckedChanged, value); }
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remove { Events.RemoveHandler (EventCheckedChanged, value); }
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}
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protected virtual void OnCheckedChanged (EventArgs e)
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{
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EventHandler handler = (EventHandler)Events[EventCheckedChanged];
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if (handler != null)
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handler (this, e);
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}
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internal virtual string NameAttribute {
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get { return (this.UniqueID); }
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}
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protected override void LoadViewState (object savedState)
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{
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if (savedState == null) {
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base.LoadViewState (null);
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return;
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}
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Triplet saved = (Triplet) savedState;
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base.LoadViewState (saved.First);
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if (saved.Second != null) {
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if (inputAttributesState == null) {
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inputAttributesState = new StateBag(true);
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inputAttributesState.TrackViewState ();
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}
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inputAttributesState.LoadViewState (saved.Second);
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}
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if (saved.Third != null) {
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if (labelAttributesState == null) {
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labelAttributesState = new StateBag(true);
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labelAttributesState.TrackViewState ();
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}
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labelAttributesState.LoadViewState (saved.Third);
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}
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}
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protected override object SaveViewState ()
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{
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object baseView = base.SaveViewState ();
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object inputAttrView = null;
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object labelAttrView = null;
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if (inputAttributesState != null)
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inputAttrView = inputAttributesState.SaveViewState ();
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if (labelAttributesState != null)
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labelAttrView = labelAttributesState.SaveViewState ();
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if (baseView == null && inputAttrView == null && labelAttrView == null)
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return null;
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return new Triplet (baseView, inputAttrView, labelAttrView);
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}
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protected override void TrackViewState ()
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{
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base.TrackViewState();
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if (inputAttributesState != null)
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inputAttributesState.TrackViewState ();
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if (labelAttributesState != null)
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labelAttributesState.TrackViewState ();
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}
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protected internal override void OnPreRender (EventArgs e)
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{
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base.OnPreRender (e);
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Page page = Page;
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if (page != null && IsEnabled) {
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page.RegisterRequiresPostBack (this);
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page.RegisterEnabledControl (this);
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}
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}
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static bool IsInputOrCommonAttr (string attname)
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{
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attname = attname.ToUpper (Helpers.InvariantCulture);
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switch (attname) {
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case "VALUE":
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case "CHECKED":
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case "SIZE":
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case "MAXLENGTH":
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case "SRC":
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case "ALT":
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case "USEMAP":
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case "DISABLED":
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case "READONLY":
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case "ACCEPT":
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case "ACCESSKEY":
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case "TABINDEX":
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case "ONFOCUS":
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case "ONBLUR":
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case "ONSELECT":
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case "ONCHANGE":
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case "ONCLICK":
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case "ONDBLCLICK":
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case "ONMOUSEDOWN":
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case "ONMOUSEUP":
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case "ONMOUSEOVER":
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case "ONMOUSEMOVE":
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case "ONMOUSEOUT":
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case "ONKEYPRESS":
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case "ONKEYDOWN":
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case "ONKEYUP":
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return true;
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default:
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return false;
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}
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}
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bool AddAttributesForSpan (HtmlTextWriter writer)
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{
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if (HasAttributes) {
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AttributeCollection attributes = Attributes;
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ICollection k = attributes.Keys;
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string [] keys = new string [k.Count];
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k.CopyTo (keys, 0);
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foreach (string key in keys) {
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if (!IsInputOrCommonAttr (key))
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continue;
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if (common_attrs == null)
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common_attrs = new AttributeCollection (new StateBag ());
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common_attrs [key] = Attributes [key];
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attributes.Remove (key);
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}
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if (attributes.Count > 0) {
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attributes.AddAttributes (writer);
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return true;
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}
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}
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return false;
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}
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protected internal override void Render (HtmlTextWriter writer)
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{
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Page page = Page;
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if (page != null) {
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page.VerifyRenderingInServerForm (this);
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page.ClientScript.RegisterForEventValidation (UniqueID);
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}
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bool need_span = ControlStyleCreated && !ControlStyle.IsEmpty;
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bool enabled = IsEnabled;
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if (!enabled) {
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if (!RenderingCompatibilityLessThan40)
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ControlStyle.PrependCssClass (DisabledCssClass);
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else
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writer.AddAttribute (HtmlTextWriterAttribute.Disabled, "disabled", false);
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need_span = true;
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}
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if (need_span) {
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AddDisplayStyleAttribute (writer);
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ControlStyle.AddAttributesToRender (writer, this);
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}
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string tt = ToolTip;
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if (tt != null && tt.Length > 0){
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writer.AddAttribute ("title", tt);
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need_span = true;
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}
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if (HasAttributes && AddAttributesForSpan (writer))
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need_span = true;
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if (need_span)
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writer.RenderBeginTag (HtmlTextWriterTag.Span);
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TextAlign align = TextAlign;
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if (align == TextAlign.Right) {
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RenderInput (writer, enabled);
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RenderLabel (writer);
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} else {
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RenderLabel (writer);
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RenderInput (writer, enabled);
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}
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if (need_span)
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writer.RenderEndTag ();
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}
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void RenderInput (HtmlTextWriter w, bool enabled)
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{
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if (ClientID != null && ClientID.Length > 0)
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w.AddAttribute (HtmlTextWriterAttribute.Id, ClientID);
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w.AddAttribute (HtmlTextWriterAttribute.Type, render_type);
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string nameAttr = NameAttribute;
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if (nameAttr != null && nameAttr.Length > 0)
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w.AddAttribute (HtmlTextWriterAttribute.Name, nameAttr);
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InternalAddAttributesToRender (w, enabled);
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AddAttributesToRender (w);
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if (Checked)
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w.AddAttribute (HtmlTextWriterAttribute.Checked, "checked", false);
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if (AutoPostBack) {
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Page page = Page;
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string onclick = page != null ? page.ClientScript.GetPostBackEventReference (GetPostBackOptions (), true) : String.Empty;
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onclick = String.Concat ("setTimeout('", onclick.Replace ("\\", "\\\\").Replace ("'", "\\'"), "', 0)");
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if (common_attrs != null && common_attrs ["onclick"] != null) {
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onclick = ClientScriptManager.EnsureEndsWithSemicolon (common_attrs ["onclick"]) + onclick;
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common_attrs.Remove ("onclick");
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}
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w.AddAttribute (HtmlTextWriterAttribute.Onclick, onclick);
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}
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if (AccessKey.Length > 0)
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w.AddAttribute (HtmlTextWriterAttribute.Accesskey, AccessKey);
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if (TabIndex != 0)
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w.AddAttribute (HtmlTextWriterAttribute.Tabindex,
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TabIndex.ToString (NumberFormatInfo.InvariantInfo));
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if (common_attrs != null)
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common_attrs.AddAttributes (w);
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if (inputAttributes != null)
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inputAttributes.AddAttributes (w);
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w.RenderBeginTag (HtmlTextWriterTag.Input);
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w.RenderEndTag ();
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}
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void RenderLabel (HtmlTextWriter w)
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{
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string text = Text;
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if (text.Length > 0) {
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if (labelAttributes != null)
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labelAttributes.AddAttributes (w);
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w.AddAttribute (HtmlTextWriterAttribute.For, ClientID);
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w.RenderBeginTag (HtmlTextWriterTag.Label);
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w.Write (text);
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w.RenderEndTag ();
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}
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}
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protected virtual bool LoadPostData (string postDataKey, NameValueCollection postCollection)
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{
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if (!IsEnabled)
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return false;
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string postedValue = postCollection[postDataKey];
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bool postedBool = ((postedValue != null) &&
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(postedValue.Length > 0));
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if (Checked != postedBool) {
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Checked = postedBool;
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return (true);
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}
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return (false);
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}
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protected virtual void RaisePostDataChangedEvent ()
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{
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ValidateEvent (UniqueID, String.Empty);
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if (CausesValidation) {
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Page page = Page;
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if (page != null)
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page.Validate (ValidationGroup);
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}
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OnCheckedChanged (EventArgs.Empty);
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}
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bool IPostBackDataHandler.LoadPostData (string postDataKey, NameValueCollection postCollection)
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{
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return LoadPostData (postDataKey, postCollection);
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}
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void IPostBackDataHandler.RaisePostDataChangedEvent ()
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{
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RaisePostDataChangedEvent ();
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}
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PostBackOptions GetPostBackOptions ()
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{
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PostBackOptions options = new PostBackOptions (this);
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options.ActionUrl = null;
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options.ValidationGroup = null;
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options.Argument = String.Empty;
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options.RequiresJavaScriptProtocol = false;
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options.ClientSubmit = true;
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Page page = Page;
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options.PerformValidation = CausesValidation && page != null && page.AreValidatorsUplevel (ValidationGroup);
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if (options.PerformValidation)
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options.ValidationGroup = ValidationGroup;
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return options;
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}
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protected override void AddAttributesToRender (HtmlTextWriter writer)
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{
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}
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internal virtual void InternalAddAttributesToRender (HtmlTextWriter w, bool enabled)
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{
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if (!enabled)
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w.AddAttribute (HtmlTextWriterAttribute.Disabled, "disabled", false);
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}
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}
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}
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