NextPreviousPagerField.cs :  » 2.6.4-mono-.net-core » System.Web » System » Web » UI » WebControls » C# / CSharp Open Source

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C# / CSharp Open Source » 2.6.4 mono .net core » System.Web 
System.Web » System » Web » UI » WebControls » NextPreviousPagerField.cs
//
// System.Web.UI.WebControls.NextPreviousPagerField
//
// Authors:
//   Marek Habersack (mhabersack@novell.com)
//
// (C) 2007-2008 Novell, Inc
//

//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
// 
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if NET_3_5
using System;
using System.ComponentModel;
using System.Security.Permissions;
using System.Web;
using System.Web.UI;

namespace System.Web.UI.WebControls{
  [AspNetHostingPermissionAttribute(SecurityAction.LinkDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  [AspNetHostingPermissionAttribute(SecurityAction.InheritanceDemand, Level = AspNetHostingPermissionLevel.Minimal)]
  public class NextPreviousPagerField : DataPagerField
  {
    int _startRowIndex;
    int _maximumRows;
    int _totalRowCount;
    int _fieldIndex;
    
    public NextPreviousPagerField ()
    {
    }

    protected override void CopyProperties (DataPagerField newField)
    {
      base.CopyProperties (newField);

      NextPreviousPagerField field = newField as NextPreviousPagerField;
      if (field == null)
        return;
      
      field.ButtonCssClass = ButtonCssClass;
      field.ButtonType = ButtonType;
      field.FirstPageImageUrl = FirstPageImageUrl;
      field.FirstPageText = FirstPageText;
      field.LastPageImageUrl = LastPageImageUrl;
      field.LastPageText = LastPageText;
      field.NextPageImageUrl = NextPageImageUrl;
      field.NextPageText = NextPageText;
      field.PreviousPageImageUrl = PreviousPageImageUrl;
      field.PreviousPageText = PreviousPageText;
      field.ShowFirstPageButton = ShowFirstPageButton;
      field.ShowLastPageButton = ShowLastPageButton;
      field.ShowNextPageButton = ShowNextPageButton;
      field.ShowPreviousPageButton = ShowPreviousPageButton;
    }

    // What's the fieldIndex used for?
    public override void CreateDataPagers (DataPagerFieldItem container, int startRowIndex, int maximumRows, int totalRowCount, int fieldIndex)
    {
      _startRowIndex = startRowIndex;
      _maximumRows = maximumRows;
      _totalRowCount = totalRowCount;
      _fieldIndex = fieldIndex;

      bool setPagePropertiesNeeded = false;
      bool queryMode = GetQueryModeStartRowIndex (_totalRowCount, _maximumRows, ref _startRowIndex, ref setPagePropertiesNeeded);
      bool enablePrevFirst = _startRowIndex >= _maximumRows;
      bool enableNextLast = (_startRowIndex + _maximumRows) < _totalRowCount;
      bool addNonBreakingSpace = RenderNonBreakingSpacesBetweenControls;

      if (ShowFirstPageButton)
        CreateButton (container, DataControlCommands.FirstPageCommandArgument, FirstPageText, FirstPageImageUrl, 0,
                queryMode, enablePrevFirst, addNonBreakingSpace);
      
      int newPageNum = -1;
      if (ShowPreviousPageButton) {
        if (queryMode)
          newPageNum = (_startRowIndex / _maximumRows) - 1;
        
        CreateButton (container, DataControlCommands.PreviousPageCommandArgument, PreviousPageText, PreviousPageImageUrl, newPageNum,
                queryMode, enablePrevFirst, addNonBreakingSpace);
      }
      
      if (ShowNextPageButton) {
        if (queryMode)
          newPageNum = (_startRowIndex + _maximumRows) / _maximumRows;
        
        CreateButton (container, DataControlCommands.NextPageCommandArgument, NextPageText, NextPageImageUrl, newPageNum,
                queryMode, enableNextLast, addNonBreakingSpace);
      }
      
      if (ShowLastPageButton) {
        if (queryMode) {
          newPageNum = _totalRowCount / _maximumRows;
          if ((_totalRowCount % _maximumRows) == 0)
            newPageNum--;
        }
        
        CreateButton (container, DataControlCommands.LastPageCommandArgument, LastPageText, LastPageImageUrl, newPageNum,
                queryMode, enableNextLast, addNonBreakingSpace);
      }
      
      if (setPagePropertiesNeeded)
        DataPager.SetPageProperties (_startRowIndex, _maximumRows, true);
    }

    void CreateButton (DataPagerFieldItem container, string commandName, string text, string imageUrl, int pageNum,
           bool queryMode, bool enabled, bool addNonBreakingSpace)
    {
      WebControl ctl = null;
      
      if (queryMode) {
        pageNum++;
        HyperLink h = new HyperLink ();
        h.Text = text;
        h.ImageUrl = imageUrl;
        h.Enabled = enabled;
        h.NavigateUrl = GetQueryStringNavigateUrl (pageNum);
        h.CssClass = ButtonCssClass;
        ctl = h;
      } else {
        if (!enabled && RenderDisabledButtonsAsLabels) {
          Label l = new Label ();
          l.Text = text;
          ctl = l;
        } else {
          switch (ButtonType) {
            case ButtonType.Button:
              Button btn = new Button ();
              btn.CommandName = commandName;
              btn.Text = text;
              ctl = btn;
              break;

            case ButtonType.Link:
              LinkButton lbtn = new LinkButton ();
              lbtn.CommandName = commandName;
              lbtn.Text = text;
              ctl = lbtn;
              break;

            case ButtonType.Image:
              ImageButton ibtn = new ImageButton ();
              ibtn.CommandName = commandName;
              ibtn.ImageUrl = imageUrl;
              ibtn.AlternateText = text;
              ctl = ibtn;
              break;
          }

          if (ctl != null) {
            ctl.Enabled = enabled;
            ctl.CssClass = ButtonCssClass;
          }
        }
      }

      if (ctl != null) {
        container.Controls.Add (ctl);
        if (addNonBreakingSpace)
          container.Controls.Add (new LiteralControl ("&nbsp;"));
      }
    }
    
    protected override DataPagerField CreateField ()
    {
      return new NextPreviousPagerField ();
    }

    public override bool Equals (object o)
    {
      NextPreviousPagerField field = o as NextPreviousPagerField;
      if (field == null)
        return false;
      
      // Compare using the properties that are copied in CopyProperties
      if (field.ButtonCssClass != ButtonCssClass)
        return false;

      if (field.ButtonType != ButtonType)
        return false;

      if (field.FirstPageImageUrl != FirstPageImageUrl)
        return false;
      
      if (field.FirstPageText != FirstPageText)
        return false;
      
      if (field.LastPageImageUrl != LastPageImageUrl)
        return false;
      
      if (field.LastPageText != LastPageText)
        return false;
      
      if (field.NextPageImageUrl != NextPageImageUrl)
        return false;
      
      if (field.NextPageText != NextPageText)
        return false;
      
      if (field.PreviousPageImageUrl != PreviousPageImageUrl)
        return false;
      
      if (field.PreviousPageText != PreviousPageText)
        return false;
      
      if (field.ShowFirstPageButton != ShowFirstPageButton)
        return false;
      
      if (field.ShowLastPageButton != ShowLastPageButton)
        return false;
      
      if (field.ShowNextPageButton != ShowNextPageButton)
        return false;
      
      if (field.ShowPreviousPageButton != ShowPreviousPageButton)
        return false;

      return true;
    }

    public override int GetHashCode ()
    {
      int ret = 0;

      // Base the calculation on the properties that are copied in CopyProperties
      ret |= ButtonCssClass.GetHashCode ();
      ret |= ButtonType.GetHashCode ();
      ret |= FirstPageImageUrl.GetHashCode ();
      ret |= FirstPageText.GetHashCode ();
      ret |= LastPageImageUrl.GetHashCode ();
      ret |= LastPageText.GetHashCode ();
      ret |= NextPageImageUrl.GetHashCode ();
      ret |= NextPageText.GetHashCode ();
      ret |= PreviousPageImageUrl.GetHashCode ();
      ret |= PreviousPageText.GetHashCode ();
      ret |= ShowFirstPageButton.GetHashCode ();
      ret |= ShowLastPageButton.GetHashCode ();
      ret |= ShowNextPageButton.GetHashCode ();
      ret |= ShowPreviousPageButton.GetHashCode ();

      return ret;
    }

    public override void HandleEvent (CommandEventArgs e)
    {
      string commandName = e.CommandName;
      int newStartIndex = -1;
      int pageSize = DataPager.PageSize;
      
      if (String.Compare (commandName, DataControlCommands.FirstPageCommandArgument, StringComparison.OrdinalIgnoreCase) == 0)
        newStartIndex = 0;
      else if (String.Compare (commandName, DataControlCommands.LastPageCommandArgument, StringComparison.OrdinalIgnoreCase) == 0) {
        int lastPageMod = _totalRowCount % pageSize;
        if (lastPageMod == 0)
          newStartIndex = _totalRowCount - pageSize;
        else
          newStartIndex = _totalRowCount - lastPageMod;
      } else if (String.Compare (commandName, DataControlCommands.NextPageCommandArgument, StringComparison.OrdinalIgnoreCase) == 0) {
        newStartIndex = _startRowIndex + pageSize;
        if (_totalRowCount >= 0 && newStartIndex > _totalRowCount)
          newStartIndex = _totalRowCount - pageSize;
      } else if (String.Compare (commandName, DataControlCommands.PreviousPageCommandArgument, StringComparison.OrdinalIgnoreCase) == 0) {
        newStartIndex = _startRowIndex - pageSize;
        if (newStartIndex < 0)
          newStartIndex = 0;
      }

      if (newStartIndex >= 0)
        DataPager.SetPageProperties (newStartIndex, pageSize, true);
    }

    public string ButtonCssClass {
      get {
        string s = ViewState ["ButtonCssClass"] as string;
        if (s != null)
          return s;

        return String.Empty;
      }
      
      set { ViewState ["ButtonCssClass"] = value; }
    }

    public ButtonType ButtonType {
      get {
        object o = ViewState ["ButtonType"];
        if (o != null)
          return (ButtonType) o;

        return ButtonType.Link;
      }
      
      set { ViewState ["ButtonType"] = value; }
    }

    public string FirstPageImageUrl {
      get {
        string s = ViewState ["FirstPageImageUrl"] as string;
        if (s != null)
          return s;

        return String.Empty;
      }
      
      set { ViewState ["FirstPageImageUrl"] = value; }
    }

    public string FirstPageText {
      get {
        string s = ViewState ["FirstPageText"] as string;
        if (s != null)
          return s;

        return "First";
      }
      
      set { ViewState ["FirstPageText"] = value; }
    }

    public string LastPageImageUrl {
      get {
        string s = ViewState ["LastPageImageUrl"] as string;
        if (s != null)
          return s;

        return String.Empty;
      }
      
      set { ViewState ["LastPageImageUrl"] = value; }
    }

    public string LastPageText {
      get {
        string s = ViewState ["LastPageText"] as string;
        if (s != null)
          return s;

        return "Last";
      }
      
      set { ViewState ["LastPageText"] = value; }
    }

    public string NextPageImageUrl {
      get {
        string s = ViewState ["NextPageImageUrl"] as string;
        if (s != null)
          return s;

        return String.Empty;
      }
      
      set { ViewState ["NextPageImageUrl"] = value; }
    }

    public string NextPageText {
      get {
        string s = ViewState ["NextPageText"] as string;
        if (s != null)
          return s;

        return "Next";
      }
      
      set { ViewState ["NextPageText"] = value; }
    }

    public string PreviousPageImageUrl {
      get {
        string s = ViewState ["PreviousPageImageUrl"] as string;
        if (s != null)
          return s;

        return String.Empty;
      }
      
      set { ViewState ["PreviousPageImageUrl"] = value; }
    }

    public string PreviousPageText {
      get {
        string s = ViewState ["PreviousPageText"] as string;
        if (s != null)
          return s;

        return "Previous";
      }
      
      set { ViewState ["PreviousPageText"] = value; }
    }

    public bool RenderDisabledButtonsAsLabels {
      get {
        object o = ViewState ["RenderDisabledButtonsAsLabels"];
        if (o != null)
          return (bool) o;

        return false;
      }
      
      set { ViewState ["RenderDisabledButtonsAsLabels"] = value; }
    }

    public bool RenderNonBreakingSpacesBetweenControls {
      get {
        object o = ViewState ["RenderNonBreakingSpacesBetweenControls"];
        if (o != null)
          return (bool) o;

        return true;
      }
      
      set { ViewState ["RenderNonBreakingSpacesBetweenControls"] = value; }
    }

    public bool ShowFirstPageButton {
      get {
        object o = ViewState ["ShowFirstPageButton"];
        if (o != null)
          return (bool) o;

        return false;
      }
      
      set { ViewState ["ShowFirstPageButton"] = value; }
    }

    public bool ShowLastPageButton {
      get {
        object o = ViewState ["ShowLastPageButton"];
        if (o != null)
          return (bool) o;

        return false;
      }
      
      set { ViewState ["ShowLastPageButton"] = value; }
    }

    public bool ShowNextPageButton {
      get {
        object o = ViewState ["ShowNextPageButton"];
        if (o != null)
          return (bool) o;

        return true;
      }
      
      set { ViewState ["ShowNextPageButton"] = value; }
    }

    public bool ShowPreviousPageButton {
      get {
        object o = ViewState ["ShowPreviousPageButton"];
        if (o != null)
          return (bool) o;

        return true;
      }
      
      set { ViewState ["ShowPreviousPageButton"] = value; }
    }
  }
}
#endif
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