#region License

// Copyright 2005-2019 Paul Kohler (https://github.com/paulkohler/minisqlquery). All rights reserved.
// This source code is made available under the terms of the GNU Lesser General Public License v3.0
// https://github.com/paulkohler/minisqlquery/blob/master/LICENSE
#endregion

using System.Windows.Forms;
using MiniSqlQuery.Core;
using MiniSqlQuery.Core.Commands;

namespace MiniSqlQuery.PlugIns.SearchTools.Commands
{
    /// <summary>The find next string command.</summary>
    public class FindNextStringCommand : CommandBase
    {
        /// <summary>Initializes a new instance of the <see cref="FindNextStringCommand"/> class.</summary>
        public FindNextStringCommand() : base("查找下一个")
        {
            SmallImage = ImageResource.find;
            ShortcutKeys = Keys.F3;
        }

        /// <summary>Two execution methods - through the "Find Text" window or by hitting F3.
        /// If simply hitting F3, we are executing the current search from current cursor position for this window.
        /// Different windows can also have different search text.</summary>
        public override void Execute()
        {
            IFindReplaceProvider editorFindProvider = HostWindow.ActiveChildForm as IFindReplaceProvider;

            if (editorFindProvider != null)
            {
                FindTextRequest findTextRequest = null;
                int key = editorFindProvider.GetHashCode();

                // is there a request in the table for this window?
                if (SearchToolsCommon.FindReplaceTextRequests.ContainsKey(key))
                {
                    findTextRequest = SearchToolsCommon.FindReplaceTextRequests[key];
                }
                else
                {
                    if (SearchToolsCommon.FindReplaceTextRequests.Count > 0)
                    {
                        // if there is an entry in the list of searches create an instance
                        findTextRequest = new FindTextRequest(editorFindProvider);
                        findTextRequest.Position = editorFindProvider.CursorOffset;
                    }
                    else
                    {
                        // none in table, default to curently selected text if its the editor
                        IEditor editor = ActiveFormAsEditor;
                        if (editor != null && editor.SelectedText.Length > 0)
                        {
                            findTextRequest = new FindTextRequest(editorFindProvider, editor.SelectedText);
                            findTextRequest.Position = editorFindProvider.CursorOffset;
                        }
                    }
                }

                if (findTextRequest != null)
                {
                    // wrap around to start if at last pos
                    if (findTextRequest.Position != 0)
                    {
                        findTextRequest.Position = editorFindProvider.CursorOffset;
                    }

                    findTextRequest = editorFindProvider.TextFindService.FindNext(findTextRequest);
                    SearchToolsCommon.FindReplaceTextRequests[key] = findTextRequest;
                }
            }
        }
    }
}