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b22a4501cc
1. introduce variable 2. part of #389 3. refactoring program suffix in program plugin 4. 全局变量一时爽,代码重构火葬场
330 lines
9.9 KiB
C#
330 lines
9.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.Collections.Specialized;
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using System.ComponentModel;
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using System.Linq;
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using System.Windows;
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using Wox.Core.UserSettings;
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using Wox.Plugin;
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using Wox.Storage;
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namespace Wox.ViewModel
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{
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public class ResultsViewModel : BaseViewModel
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{
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#region Private Fields
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private ResultViewModel _selectedResult;
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public ResultCollection Results { get; } = new ResultCollection();
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private Thickness _margin;
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private readonly object _resultsUpdateLock = new object();
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private UserSettingStorage _settings;
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private TopMostRecordStorage _topMostRecord;
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public ResultsViewModel(UserSettingStorage settings, TopMostRecordStorage topMostRecord)
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{
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_settings = settings;
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_topMostRecord = topMostRecord;
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}
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#endregion
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#region ViewModel Properties
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public int MaxHeight => _settings.MaxResultsToShow * 50;
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public ResultViewModel SelectedResult
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{
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get
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{
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return _selectedResult;
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}
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set
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{
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if (value != null)
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{
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if (_selectedResult != null)
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{
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_selectedResult.IsSelected = false;
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}
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_selectedResult = value;
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if (_selectedResult != null)
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{
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_selectedResult.IsSelected = true;
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}
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}
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OnPropertyChanged();
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}
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}
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public Thickness Margin
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{
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get
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{
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return _margin;
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}
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set
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{
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_margin = value;
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OnPropertyChanged();
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}
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}
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#endregion
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#region Private Methods
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private bool IsTopMostResult(Result result)
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{
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return _topMostRecord.IsTopMost(result);
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}
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private int InsertIndexOf(int newScore, IList<ResultViewModel> list)
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{
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int index = 0;
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for (; index < list.Count; index++)
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{
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var result = list[index];
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if (newScore > result.RawResult.Score)
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{
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break;
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}
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}
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return index;
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}
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#endregion
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#region Public Methods
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public void SelectResult(int index)
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{
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if (index <= Results.Count - 1)
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{
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SelectedResult = Results[index];
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}
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}
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public void SelectResult(ResultViewModel result)
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{
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int i = Results.IndexOf(result);
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SelectResult(i);
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}
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public void SelectNextResult()
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{
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if (SelectedResult != null)
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{
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var index = Results.IndexOf(SelectedResult);
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if (index == Results.Count - 1)
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{
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index = -1;
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}
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SelectedResult = Results.ElementAt(index + 1);
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}
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}
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public void SelectPrevResult()
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{
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if (SelectedResult != null)
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{
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var index = Results.IndexOf(SelectedResult);
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if (index == 0)
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{
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index = Results.Count;
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}
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SelectedResult = Results.ElementAt(index - 1);
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}
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}
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public void SelectNextPage()
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{
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var index = 0;
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if (SelectedResult != null)
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{
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index = Results.IndexOf(SelectedResult);
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}
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index += 5;
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if (index > Results.Count - 1)
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{
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index = Results.Count - 1;
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}
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SelectedResult = Results.ElementAt(index);
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}
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public void SelectPrevPage()
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{
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var index = 0;
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if (SelectedResult != null)
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{
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index = Results.IndexOf(SelectedResult);
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}
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index -= 5;
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if (index < 0)
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{
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index = 0;
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}
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SelectedResult = Results.ElementAt(index);
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}
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public void Clear()
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{
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Results.Clear();
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}
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public void RemoveResultsExcept(PluginMetadata metadata)
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{
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lock (_resultsUpdateLock)
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{
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Results.RemoveAll(r => r.RawResult.PluginID != metadata.ID);
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}
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}
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public void RemoveResultsFor(PluginMetadata metadata)
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{
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lock (_resultsUpdateLock)
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{
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Results.RemoveAll(r => r.RawResult.PluginID == metadata.ID);
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}
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}
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public void AddResults(List<Result> newRawResults, string resultId)
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{
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lock (_resultsUpdateLock)
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{
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var newResults = newRawResults.Select(r => new ResultViewModel(r)).ToList();
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// todo use async to do new result calculation
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var resultsCopy = Results.ToList();
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var oldResults = resultsCopy.Where(r => r.RawResult.PluginID == resultId).ToList();
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// intersection of A (old results) and B (new newResults)
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var intersection = oldResults.Intersect(newResults).ToList();
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// remove result of relative complement of B in A
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foreach (var result in oldResults.Except(intersection))
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{
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resultsCopy.Remove(result);
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}
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// update scores
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foreach (var result in newResults)
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{
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if (IsTopMostResult(result.RawResult))
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{
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result.RawResult.Score = int.MaxValue;
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}
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}
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// update index for result in intersection of A and B
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foreach (var commonResult in intersection)
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{
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int oldIndex = resultsCopy.IndexOf(commonResult);
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int oldScore = resultsCopy[oldIndex].RawResult.Score;
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int newScore = newResults[newResults.IndexOf(commonResult)].RawResult.Score;
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if (newScore != oldScore)
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{
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var oldResult = resultsCopy[oldIndex];
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oldResult.RawResult.Score = newScore;
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resultsCopy.RemoveAt(oldIndex);
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int newIndex = InsertIndexOf(newScore, resultsCopy);
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resultsCopy.Insert(newIndex, oldResult);
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}
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}
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// insert result in relative complement of A in B
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foreach (var result in newResults.Except(intersection))
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{
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int newIndex = InsertIndexOf(result.RawResult.Score, resultsCopy);
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resultsCopy.Insert(newIndex, result);
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}
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// update UI in one run, so it can avoid UI flickering
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Results.Update(resultsCopy);
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if (Results.Count > 0)
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{
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Margin = new Thickness { Top = 8 };
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SelectedResult = Results[0];
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}
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else
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{
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Margin = new Thickness { Top = 0 };
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}
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}
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}
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#endregion
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public class ResultCollection : ObservableCollection<ResultViewModel>
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{
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public void RemoveAll(Predicate<ResultViewModel> predicate)
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{
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CheckReentrancy();
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List<ResultViewModel> itemsToRemove = Items.Where(x => predicate(x)).ToList();
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if (itemsToRemove.Count > 0)
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{
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itemsToRemove.ForEach(item => { Items.Remove(item); });
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OnPropertyChanged(new PropertyChangedEventArgs("Count"));
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OnPropertyChanged(new PropertyChangedEventArgs("Item[]"));
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// fuck ms
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// http://blogs.msdn.com/b/nathannesbit/archive/2009/04/20/addrange-and-observablecollection.aspx
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// http://geekswithblogs.net/NewThingsILearned/archive/2008/01/16/listcollectionviewcollectionview-doesnt-support-notifycollectionchanged-with-multiple-items.aspx
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// PS: don't use Reset for other data updates, it will cause UI flickering
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OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
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}
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}
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public void Update(List<ResultViewModel> newItems)
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{
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int newCount = newItems.Count;
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int oldCount = Items.Count;
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int location = newCount > oldCount ? oldCount : newCount;
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for (int i = 0; i < location; i++)
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{
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ResultViewModel oldResult = Items[i];
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ResultViewModel newResult = newItems[i];
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if (!oldResult.Equals(newResult))
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{
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this[i] = newResult;
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}
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else if (oldResult.RawResult.Score != newResult.RawResult.Score)
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{
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this[i].RawResult.Score = newResult.RawResult.Score;
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}
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}
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if (newCount > oldCount)
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{
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for (int i = oldCount; i < newCount; i++)
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{
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Add(newItems[i]);
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}
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}
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else
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{
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int removeIndex = newCount;
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for (int i = newCount; i < oldCount; i++)
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{
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RemoveAt(removeIndex);
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}
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}
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}
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}
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}
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}
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