using System;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.Windows.Forms;
using System.ComponentModel;
using FastReport.Utils;
using FastReport.Data;
using FastReport.Dialog;
using FastReport.Forms;
using FastReport.Code;
using FastReport.Design.ToolWindows;
using FastReport.Design.PageDesigners.Code;
using FastReport.FastQueryBuilder;

namespace FastReport.Design
{
    /// <summary>
    /// The base class for all designer commands.
    /// </summary>
    public class DesignerCommand
    {
        private object sender;

        internal Designer Designer { get; }

        internal Report ActiveReport
        {
            get { return Designer.ActiveReport; }
        }

        internal ReportTab ActiveReportTab
        {
            get { return Designer.ActiveReportTab; }
        }

        internal DesignerRestrictions Restrictions
        {
            get { return Designer.Restrictions; }
        }

        internal SelectedObjectCollection SelectedObjects
        {
            get { return Designer.SelectedObjects; }
        }

        internal SelectedReportComponents SelectedReportComponents
        {
            get { return Designer.SelectedReportComponents; }
        }

        internal void SetModified(string action)
        {
            Designer.SetModified(sender, action);
        }

        /// <summary>
        /// Gets a value indicating that the command is enabled.
        /// </summary>
        /// <remarks>
        /// If you use own controls that invoke designer commands, use this property to refresh
        /// the <b>Enabled</b> state of a control that is bound to this command.
        /// </remarks>
        public bool Enabled
        {
            get { return GetEnabled(); }
        }

        /// <summary>
        /// Defines a custom action for this command.
        /// </summary>
        /// <remarks>
        /// Using custom action, you can override the standard behavior of this designer's command.
        /// </remarks>
        /// <example>
        /// This example demonstrates how to override the "New..." command behavior.
        /// <code>
        /// // add an event handler that will be fired when the designer is run
        /// Config.DesignerSettings.DesignerLoaded += new EventHandler(DesignerSettings_DesignerLoaded);
        ///
        /// void DesignerSettings_DesignerLoaded(object sender, EventArgs e)
        /// {
        ///   // override "New..." command behavior
        ///   (sender as Designer).cmdNew.CustomAction += new EventHandler(cmdNew_CustomAction);
        /// }
        ///
        /// void cmdNew_CustomAction(object sender, EventArgs e)
        /// {
        ///   // show the "Label" wizard instead of standard "Add New Item" dialog
        ///   Designer designer = sender as Designer;
        ///   LabelWizard wizard = new LabelWizard();
        ///   wizard.Run(designer);
        /// }
        /// </code>
        /// </example>
        public event EventHandler CustomAction;

        /// <summary>
        /// Gets a value for the <b>Enabled</b> property.
        /// </summary>
        /// <returns><b>true</b> if command is enabled.</returns>
        protected virtual bool GetEnabled()
        {
            return true;
        }

        /// <summary>
        /// Invokes the command.
        /// </summary>
        public virtual void Invoke()
        {
        }

        /// <summary>
        /// Invokes the command with specified sender and event args.
        /// </summary>
        /// <param name="sender">Sender.</param>
        /// <param name="e">Event args.</param>
        /// <remarks>
        /// This method is compatible with standard <see cref="EventHandler"/> and can be passed
        /// to the event handler constructor directly.
        /// </remarks>
        public void Invoke(object sender, EventArgs e)
        {
            if (CustomAction != null)
                CustomAction(Designer, e);
            else
            {
                this.sender = sender;
                Invoke();
            }
        }

        internal DesignerCommand(Designer designer)
        {
            this.Designer = designer;
        }
    }

    /// <summary>
    /// Represents the "File|New" command.
    /// </summary>
    public class NewCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontCreateReport &&
              (Designer.MdiMode || ActiveReportTab != null);
        }

        /// <inheritdoc/>
        public override void Invoke()
        {

            Designer.ValidatorWindow.CancelUpdateErrors();

            using (AddNewItemForm form = new AddNewItemForm(Designer))
            {
                if (form.ShowDialog() == DialogResult.OK)
                    form.SelectedWizard.Run(Designer);
            }

            Designer.ValidatorWindow.ShowLoadingProgress();
            Designer.ValidatorWindow.UpdateErrors(!PageDesigners.Page.ReportWorkspace.EnableBacklightIntersectingObjects);
        }

        internal NewCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "New Page" toolbar command.
    /// </summary>
    public class NewPageCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontCreatePage && ActiveReport != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            ActiveReportTab.NewReportPage();
        }

        internal NewPageCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "New Dialog" toolbar command.
    /// </summary>
    public class NewDialogCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontCreatePage && ActiveReport != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            ActiveReportTab.NewDialog();
        }

        internal NewDialogCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Open..." command. Also can be used for loading a file
    /// from the recent files list.
    /// </summary>
    public class OpenCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontLoadReport &&
              (Designer.MdiMode || ActiveReportTab != null);
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            LoadFile("");
        }

        /// <summary>
        /// Loads a specified report file.
        /// </summary>
        /// <param name="fileName">File to load.</param>
        public void LoadFile(string fileName)
        {
            Designer.ValidatorWindow.CancelUpdateErrors();
            ReportTab reportTab = null;
            if (Designer.MdiMode)
            {
                // check if file is already opened
                if (!String.IsNullOrEmpty(fileName))
                {
                    foreach (DocumentWindow c in Designer.Documents)
                    {
                        if (c is ReportTab && String.Compare((c as ReportTab).Report.FileName, fileName, true) == 0)
                        {
                            c.Activate();
                            return;
                        }
                    }
                }

                Report report = new Report();
                report.Designer = Designer;
                reportTab = Designer.CreateReportTab(report);
            }
            else
                reportTab = ActiveReportTab;

            if (reportTab.LoadFile(fileName))
            {
                if (Designer.MdiMode)
                    Designer.AddReportTab(reportTab);
            }
            else if (Designer.MdiMode)
                reportTab.Dispose();

            Designer.ValidatorWindow.CancelUpdateErrors();
            Designer.ValidatorWindow.ShowLoadingProgress();
            Designer.ValidatorWindow.UpdateErrors(!PageDesigners.Page.ReportWorkspace.EnableBacklightIntersectingObjects);

            Config.ReportSettings.OnFinishLoadingProgress();
        }

        internal OpenCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Save" command.
    /// </summary>
    public class SaveCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontSaveReport &&
              ActiveReportTab != null &&
              ActiveReportTab.Modified;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            ActiveReportTab.SaveFile(false);
        }

        internal SaveCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Save As..." command.
    /// </summary>
    public class SaveAsCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontSaveReport && ActiveReportTab != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            ActiveReportTab.SaveFile(true);
        }

        internal SaveAsCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Save With Random Data..." command.
    /// </summary>
    public class SaveWithRandomDataCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontSaveReport && ActiveReportTab != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            ActiveReportTab.SaveWithRandomData();
        }

        internal SaveWithRandomDataCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Save All" command.
    /// </summary>
    public class SaveAllCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            bool enabled = Designer.MdiMode && Designer.Documents.Count > 0;
            if (Designer.Documents.Count == 1 && Designer.Documents[0] is StartPageTab)
                enabled = false;
            return !Restrictions.DontSaveReport && enabled;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            foreach (DocumentWindow c in Designer.Documents)
            {
                if (c is ReportTab)
                    (c as ReportTab).SaveFile(false);
            }
        }

        internal SaveAllCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Close" command.
    /// </summary>
    public class CloseCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return Designer.MdiMode && Designer.Documents.Count > 0;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            if (Designer.ActiveReportTab != null)
                Designer.CloseDocument(ActiveReportTab);
            else if (Designer.StartPage != null)
                Designer.CloseDocument(Designer.StartPage);
        }

        internal CloseCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Window|Close All" command.
    /// </summary>
    public class CloseAllCommand : CloseCommand
    {
        /// <inheritdoc/>
        public override void Invoke()
        {
            int i = 0;
            while (i < Designer.Documents.Count)
            {
                DocumentWindow c = Designer.Documents[i];
                if (c is StartPageTab || !Designer.CloseDocument(c))
                    i++;
            }
        }

        internal CloseAllCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Preview..." command.
    /// </summary>
    public class PreviewCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontPreviewReport && ActiveReport != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            Designer.ValidatorWindow.CancelUpdateErrors();

            ActiveReportTab.Preview();

            Designer.ValidatorWindow.ShowLoadingProgress();
            Designer.ValidatorWindow.UpdateErrors(!PageDesigners.Page.ReportWorkspace.EnableBacklightIntersectingObjects);
        }

        internal PreviewCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Page Setup..." command.
    /// </summary>
    public class PageSettingsCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontChangePageOptions &&
              ActiveReport != null &&
              ActiveReportTab.ActivePage is ReportPage;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            IHasEditor page = ActiveReportTab.ActivePage as IHasEditor;
            if (page.InvokeEditor())
            {
                SetModified("EditPage");
            }
        }

        internal PageSettingsCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Report|Options..." command.
    /// </summary>
    public class ReportSettingsCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontChangeReportOptions && ActiveReport != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            using (ReportOptionsForm form = new ReportOptionsForm(ActiveReport))
            {
                ActiveReport.ScriptText = ActiveReportTab.Script;
                if (form.ShowDialog() == DialogResult.OK)
                {
                    ActiveReportTab.Script = ActiveReport.ScriptText;
                    (ActiveReportTab.Plugins.Find("Code") as CodePageDesigner).UpdateLanguage();
                    SetModified("EditReport");
                }
            }
        }

        internal ReportSettingsCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Printer Setup..." command.
    /// </summary>
    public class PrinterSettingsCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontChangeReportOptions && ActiveReport != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            using (PrinterSetupForm editor = new PrinterSetupForm())
            {
                editor.Report = ActiveReport;
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    SetModified("EditPrinter");
                }
            }
        }

        internal PrinterSettingsCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Undo" command.
    /// </summary>
    public class UndoCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return ActiveReport != null && ActiveReportTab.CanUndo;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            Undo(1);
        }

        /// <summary>
        /// Undo several actions.
        /// </summary>
        /// <param name="actionsCount">Number of actions to undo.</param>
        public void Undo(int actionsCount)
        {
            Designer.ValidatorWindow.CancelUpdateErrors();
            ActiveReportTab.Undo(actionsCount);
            Designer.ValidatorWindow.UpdateErrors(false);
        }

        internal UndoCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Redo" command.
    /// </summary>
    public class RedoCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return ActiveReport != null && ActiveReportTab.CanRedo;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            Redo(1);
        }

        /// <summary>
        /// Redo several actions.
        /// </summary>
        /// <param name="actionsCount">Number of actions to redo.</param>
        public void Redo(int actionsCount)
        {
            Designer.ValidatorWindow.CancelUpdateErrors();
            ActiveReportTab.Redo(actionsCount);
            Designer.ValidatorWindow.UpdateErrors(false);
        }

        internal RedoCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Cut" command.
    /// </summary>
    public class CutCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            if (ActiveReportTab != null && ActiveReportTab.ActivePage == null)
                return true;
            bool enable = ActiveReportTab != null &&
              ActiveReportTab.ActivePage != null &&
              SelectedObjects.Count > 0;
            if (enable)
            {
                enable = false;
                // if at least one object can be copied, allow the operation
                foreach (Base c in SelectedObjects)
                {
                    if (c.HasFlag(Flags.CanCopy))
                    {
                        enable = true;
                        break;
                    }
                }
            }
            return enable;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            Designer.ValidatorWindow.CancelUpdateErrors();
            if (ActiveReportTab != null && ActiveReportTab.ActivePage == null)
            {
                if (ActiveReportTab.IsFRXPageActie)
                    Designer.FRXEditor.Cut();
                else
                    Designer.Editor.Cut();
            }
            else if (Enabled)
                Designer.Clipboard.Cut();
        }

        internal CutCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Copy" command.
    /// </summary>
    public class CopyCommand : CutCommand
    {
        /// <inheritdoc/>
        public override void Invoke()
        {
            if (ActiveReportTab != null && ActiveReportTab.ActivePage == null)
            {
                if (ActiveReportTab.IsFRXPageActie)
                    Designer.FRXEditor.Copy();
                else
                    Designer.Editor.Copy();
            }
            else if (Enabled)
                Designer.Clipboard.Copy();
        }

        internal CopyCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Copy Page" command.
    /// </summary>
    public class CopyPageCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontCopyPage && ActiveReport != null && ActiveReportTab.ActivePage != null &&
                ActiveReport.Pages.Count > 0 && (ActiveReportTab.ActivePage is ReportPage || ActiveReportTab.ActivePage is DialogPage) &&
                !ActiveReportTab.ActivePage.IsAncestor;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            if (Enabled)
            {
                ActiveReportTab.CopyPage();
            }
        }

        internal CopyPageCommand(Designer designer) : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Paste" command.
    /// </summary>
    public class PasteCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            if (ActiveReportTab != null && ActiveReportTab.ActivePage == null)
                return true;
            return ActiveReportTab != null && ActiveReportTab.ActivePage != null && Designer.Clipboard.CanPaste;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            Designer.ValidatorWindow.CancelUpdateErrors();
            if (ActiveReportTab != null && ActiveReportTab.ActivePage == null)
            {
                if (ActiveReportTab.IsFRXPageActie)
                    Designer.FRXEditor.Paste();
                else
                    Designer.Editor.Paste();
            }
            else
                Designer.Clipboard.Paste();
        }

        internal PasteCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Format Painter" toolbar command.
    /// </summary>
    public class FormatPainterCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return ActiveReportTab != null &&
              ActiveReportTab.ActivePage != null &&
              SelectedReportComponents.Count > 0;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            Designer.FormatPainter = !Designer.FormatPainter;
        }

        internal FormatPainterCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Delete" command.
    /// </summary>
    public class DeleteCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            bool enable = SelectedObjects.Count > 0;
            if (enable && SelectedObjects.Count == 1 &&
              (!SelectedObjects[0].HasFlag(Flags.CanDelete) ||
                SelectedObjects[0].HasRestriction(FastReport.Restrictions.DontDelete)))
                enable = false;
            return enable;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            if (SelectedObjects.IsPageSelected || SelectedObjects.IsReportSelected)
                return;

            Designer.ValidatorWindow.CancelUpdateErrors();

            foreach (Base c in SelectedObjects)
            {
                if (!c.HasFlag(Flags.CanDelete) || c.HasRestriction(FastReport.Restrictions.DontDelete))
                    continue;
                else
                {
                    if (c.IsAncestor)
                    {
                        FRMessageBox.Error(String.Format(Res.Get("Messages,DeleteAncestor"), c.Name));
                        return;
                    }
                    foreach (Base b in c.AllObjects)
                    {
                        if (b is SubreportObject) b.Delete();
                    }
                    c.Delete();
                }
            }
            SetModified("Delete");
            Designer.SelectionChanged(null);
        }

        internal DeleteCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Delete Page" command.
    /// </summary>
    public class DeletePageCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontDeletePage && ActiveReport != null &&
              ActiveReportTab.ActivePage != null &&
              ActiveReport.Pages.Count > 1 &&
              !ActiveReportTab.ActivePage.IsAncestor;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            if (Enabled)
            {
                ActiveReportTab.DeletePage();
            }
        }

        internal DeletePageCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Select All" command.
    /// </summary>
    public class SelectAllCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return ActiveReportTab != null && ActiveReportTab.ActivePage != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            if (ActiveReportTab != null)
                ActiveReportTab.ActivePageDesigner.SelectAll();
        }

        internal SelectAllCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Group" command.
    /// </summary>
    public class GroupCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return SelectedObjects.Count > 1;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            Dictionary<int, int> groups = new Dictionary<int, int>();

            // collect used group indices
            ObjectCollection allObjects = ActiveReport.AllObjects;
            foreach (Base c in Designer.Objects)
            {
                if (c is ComponentBase)
                {
                    int index = (c as ComponentBase).GroupIndex;
                    if (!groups.ContainsKey(index))
                        groups.Add(index, 0);
                }
            }

            // find index that not in use
            int groupIndex;
            for (groupIndex = 1; ; groupIndex++)
            {
                if (!groups.ContainsKey(groupIndex))
                    break;
            }

            foreach (Base c in SelectedObjects)
            {
                ComponentBase obj = c as ComponentBase;
                if (obj != null && obj.HasFlag(Flags.CanGroup))
                    obj.GroupIndex = groupIndex;
            }
        }

        internal GroupCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Ungroup" command.
    /// </summary>
    public class UngroupCommand : GroupCommand
    {
        /// <inheritdoc/>
        public override void Invoke()
        {
            foreach (Base c in SelectedObjects)
            {
                if (c is ComponentBase)
                    (c as ComponentBase).GroupIndex = 0;
            }
        }

        internal UngroupCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit" command.
    /// </summary>
    public class EditCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return SelectedObjects.Count == 1 && SelectedObjects[0] is IHasEditor;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            if (!SelectedObjects[0].HasRestriction(FastReport.Restrictions.DontEdit) &&
              (SelectedObjects[0] as IHasEditor).InvokeEditor())
                SetModified("EditObject");
        }

        internal EditCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Edit|Find..." command.
    /// </summary>
    public class FindCommand : DesignerCommand
    {
        internal bool isReplace;

        private void searchForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            (sender as Form).Dispose();
        }

        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return ActiveReportTab != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            SearchReplaceForm form = new SearchReplaceForm(Designer, isReplace);
            form.Replace = isReplace;
            form.FormClosed += new FormClosedEventHandler(searchForm_FormClosed);
            form.Show();
        }

        internal FindCommand(Designer designer)
          : base(designer)
        {
            isReplace = false;
        }
    }

    /// <summary>
    /// Represents the "Edit|Replace..." command.
    /// </summary>
    public class ReplaceCommand : FindCommand
    {
        internal ReplaceCommand(Designer designer)
          : base(designer)
        {
            isReplace = true;
        }
    }

    /// <summary>
    /// Represents the "Bring To Front" context menu command.
    /// </summary>
    public class BringToFrontCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            bool enable = SelectedObjects.Count > 0;
            if (enable && SelectedObjects.Count == 1 && !SelectedObjects[0].HasFlag(Flags.CanChangeOrder))
                enable = false;
            return enable;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            foreach (Base c in SelectedObjects)
            {
                c.ZOrder = 1000;
            }
            SetModified("Change");
        }

        internal BringToFrontCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Send To Back" context menu command.
    /// </summary>
    public class SendToBackCommand : BringToFrontCommand
    {
        /// <inheritdoc/>
        public override void Invoke()
        {
            foreach (Base c in SelectedObjects)
            {
                c.ZOrder = 0;
            }
            SetModified("Change");
        }

        internal SendToBackCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Insert" command.
    /// </summary>
    /// <remarks>
    /// This command has no default action associated with it. Check the <b>Enabled</b> property
    /// to see if the insert operation is enabled.
    /// </remarks>
    public class InsertCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontInsertObject &&
              ActiveReportTab != null &&
              ActiveReportTab.ActivePage != null;
        }

        internal InsertCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Insert Band" command.
    /// </summary>
    /// <remarks>
    /// This command has no default action associated with it. Check the <b>Enabled</b> property
    /// to see if the insert operation is enabled.
    /// </remarks>
    public class InsertBandCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontInsertObject && !Restrictions.DontInsertBand && ActiveReportTab != null &&
              ActiveReportTab.ActivePage != null && ActiveReportTab.ActivePage is ReportPage;
        }

        internal InsertBandCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Data|Add Data Source..." command.
    /// </summary>
    public class AddDataCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontCreateData && ActiveReport != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            using (DataWizardForm form = new DataWizardForm(ActiveReport))
            {
                /*if (Designer.SelectedObjects.Count == 1 && Designer.SelectedObjects[0] is DataConnectionBase)
                {
                  form.Connection = Designer.SelectedObjects[0] as DataConnectionBase;
                  form.EditMode = true;
                  form.VisiblePanelIndex = 1;
                }*/
                if (form.ShowDialog() == DialogResult.OK)
                    SetModified("EditData");
            }
        }

        internal AddDataCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Data|Sort Data Sources" command.
    /// </summary>
    public class SortDataSourcesCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontSortDataSources && ActiveReport != null && ActiveReport.Dictionary.DataSources.Count > 1;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            ActiveReport.Dictionary.DataSources.Sort();
            SetModified("EditData");
        }

        internal SortDataSourcesCommand(Designer designer) : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Data|Choose Report Data..." command.
    /// </summary>
    public class ChooseDataCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontEditData && ActiveReport != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            using (ReportDataForm form = new ReportDataForm(ActiveReport))
            {
                if (form.ShowDialog() == DialogResult.OK)
                    SetModified("SelectData");
            }
        }

        internal ChooseDataCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Recent Files" command.
    /// </summary>
    /// <remarks>
    /// This command has no default action associated with it. Check the <b>Enabled</b> property
    /// to see if the recent files list is enabled.
    /// </remarks>
    public class RecentFilesCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontShowRecentFiles &&
              (Designer.MdiMode || ActiveReportTab != null);
        }

        internal void Update(string newFile)
        {
            if (!String.IsNullOrEmpty(newFile))
            {
                if (Designer.RecentFiles.IndexOf(newFile) != -1)
                    Designer.RecentFiles.RemoveAt(Designer.RecentFiles.IndexOf(newFile));
                Designer.RecentFiles.Add(newFile);
                while (Designer.RecentFiles.Count > 8)
                    Designer.RecentFiles.RemoveAt(0);
            }
        }

        internal RecentFilesCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "File|Select Language..." command.
    /// </summary>
    public class SelectLanguageCommand : DesignerCommand
    {
        /// <inheritdoc/>
        public override void Invoke()
        {
            using (SelectLanguageForm form = new SelectLanguageForm())
            {
                if (form.ShowDialog() == DialogResult.OK)
                {
                    Designer.Localize();
                }
            }
        }

        internal SelectLanguageCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "View|Options..." command.
    /// </summary>
    public class OptionsCommand : DesignerCommand
    {
        /// <inheritdoc/>
        public override void Invoke()
        {
            using (DesignerOptionsForm options = new DesignerOptionsForm(Designer))
            {
                if (options.ShowDialog() == DialogResult.OK)
                {
                    Designer.UpdatePlugins(null);
                }
            }
        }

        internal OptionsCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "View|Start Page" command.
    /// </summary>
    public class ViewStartPageCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return Designer.MdiMode;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            foreach (DocumentWindow c in Designer.Documents)
            {
                if (c is StartPageTab)
                {
                    c.Activate();
                    return;
                }
            }
            Designer.AddStartPageTab();
        }

        internal ViewStartPageCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Select polygon move" command.
    /// </summary>
    public class PolygonSelectModeCommand : DesignerCommand
    {
        private PolyLineObject.PolygonSelectionMode mode;

        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return (Designer.SelectedObjects.Count == 1) && (Designer.SelectedObjects[0] is PolyLineObject);
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            if ((Designer.SelectedObjects.Count == 1) && (Designer.SelectedObjects[0] is PolyLineObject))
            {
                PolyLineObject plobj = (Designer.SelectedObjects[0] as PolyLineObject);
                plobj.SelectionMode = mode;
                Designer.Refresh();
            }
        }

        internal PolygonSelectModeCommand(Designer designer, PolyLineObject.PolygonSelectionMode mode)
          : base(designer)
        {
            this.mode = mode;
        }
    }

    /// <summary>
    /// Represents the "Report|Styles..." command.
    /// </summary>
    public class ReportStylesCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return !Restrictions.DontChangeReportOptions && ActiveReport != null;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            if (ActiveReport == null)
                return;
            using (StyleEditorForm form = new StyleEditorForm(ActiveReport))
            {
                if (form.ShowDialog() == DialogResult.OK)
                    SetModified("ChangeReport");
            }
        }

        internal ReportStylesCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Help|Account" command.
    /// </summary>
    public class AccountCommand : DesignerCommand
    {

        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return Auth.AuthService.Instance.IsEnable;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            using (Auth.AuthForm authForm = new Auth.AuthForm())
            {
                authForm.ShowDialog();
            }
        }

        internal AccountCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Help|Help Contents..." command.
    /// </summary>
    public class HelpContentsCommand : DesignerCommand
    {
        private string GetHelpUrl()
        {
            string url = "https://www.fast-report.com/public_download/docs/FRNet/online/en/index.html";
            return url;
        }

        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return true;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            ProcessHelper.StartProcess(GetHelpUrl());
        }

        internal HelpContentsCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Help|About..." command.
    /// </summary>
    public class AboutCommand : DesignerCommand
    {
        /// <inheritdoc/>
        public override void Invoke()
        {
            using (AboutForm form = new AboutForm())
            {
                form.ShowDialog();
            }
        }

        internal AboutCommand(Designer designer)
          : base(designer)
        {
        }
    }

    /// <summary>
    /// Represents the "Show welcome window..." command.
    /// </summary>
    public class WelcomeCommand : DesignerCommand
    {
        /// <inheritdoc/>
        protected override bool GetEnabled()
        {
            return Config.WelcomeEnabled;
        }

        /// <inheritdoc/>
        public override void Invoke()
        {
            using (WelcomeForm form = new WelcomeForm(Designer))
            {
                form.ShowDialog();
            }
        }

        internal WelcomeCommand(Designer designer)
          : base(designer)
        {
        }
    }
}