Standard Regular Expression Searcher Addin For VS.NET 2003

using System;
using System.Collections.Specialized;
using System.Collections;
using EnvDTE;

using SearcherAddIn.Common;
using SearcherAddIn.Helper;

namespace SearcherAddIn
{
	/// <summary>
	/// OpenFilesSearcher ��ժҪ˵����
	/// </summary>
	public class OpenFilesSearcher : Searcher {
		private WindowSearcher _windowSearcher = null;
		private StringCollection _unhandledOpenFileList = new StringCollection();
		private string _activeOpenFullFilename = string.Empty;

		public OpenFilesSearcher(_DTE dte) : base(dte) {
		}

		private void findNextInOpenFiles(){
			if(_unhandledOpenFileList.Count > 0){
				checkWindowSearcher();
				if(_activeOpenFullFilename != _unhandledOpenFileList[0]){
					_dte.ItemOperations.OpenFile(_unhandledOpenFileList[0], Constants.vsViewKindTextView);
					_activeOpenFullFilename = _unhandledOpenFileList[0];
					_windowSearcher.MoveToStartInTextWindow();
				}
					
				if(!_windowSearcher.FindNextInSearchInFiles()){
					_unhandledOpenFileList.RemoveAt(0);
					findNextInOpenFiles();
				}
			}
			else{
				UIHelper.ShowInfo(Info.UI_PROMPT_FIND_TO_END);
			}
		}

		public void FindNext() {
			getSearchScopePath();
			if(_unhandledOpenFileList.Count > 0){
				findNextInOpenFiles();
			}
		}

		private void checkWindowSearcher(){
			if(_windowSearcher == null){
				initWindowSearcher();
				return;
			}

			if(!(_windowSearcher.Pattern == base.Pattern && _windowSearcher.RegexOptions == base.RegexOptions))
				initWindowSearcher();
		}

		private void initWindowSearcher(){
			_windowSearcher = new WindowSearcher(_dte);
			_windowSearcher.Pattern = base.Pattern;
			_windowSearcher.RegexOptions = base.RegexOptions;
		}

		private void replaceAllInOpenFiles(string replacePattern){
			if(_unhandledOpenFileList.Count > 0){
				int replaceCount = 0;
				checkWindowSearcher();
				foreach(string fullFilename in _unhandledOpenFileList){
					_dte.ItemOperations.OpenFile(fullFilename, Constants.vsViewKindTextView);
					replaceCount += _windowSearcher.ReplaceAll(replacePattern, true);
				}
				UIHelper.ShowInfo(replaceCount + " replaces happenned");
			}
		}

		private void replaceNextInOpenFiles(string replacePattern){
			if(_unhandledOpenFileList.Count > 0){
				checkWindowSearcher();

				if(_activeOpenFullFilename != _unhandledOpenFileList[0]){
					_dte.ItemOperations.OpenFile(_unhandledOpenFileList[0], Constants.vsViewKindTextView);
					_activeOpenFullFilename = _unhandledOpenFileList[0];
					_windowSearcher.MoveToStartInTextWindow();
				}
					
				if(!_windowSearcher.ReplaceNextInSearchInFiles(replacePattern)){
					_unhandledOpenFileList.RemoveAt(0);
					replaceNextInOpenFiles(replacePattern);
				}
			}
			else{
				UIHelper.ShowInfo(Info.UI_PROMPT_FIND_TO_END);
			}
		}

		public void ReplaceNext(string replacePattern){
			getSearchScopePath();
			if(_unhandledOpenFileList.Count > 0){
				replaceNextInOpenFiles(replacePattern);
				return;
			}
		}

		protected override void getSearchScopePath(){
			if(_unhandledOpenFileList.Count == 0){
				foreach(Document document in _dte.Documents){
					_unhandledOpenFileList.Add(document.FullName);
				}
			}
		}
		public void ReplaceAll(string replacePattern){
			getSearchScopePath();
			if(_unhandledOpenFileList.Count > 0){
				replaceAllInOpenFiles(replacePattern);
			}
		}
	}
}