mirror of
https://github.com/QL-Win/QuickLook.git
synced 2025-09-11 17:59:17 +00:00
Code Cleanup
This commit is contained in:
ema
@@ -1,20 +1,22 @@
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// Copyright © 2018 Paddy Xu
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//
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//
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// This file is part of QuickLook program.
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//
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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using PdfiumViewer;
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using QuickLook.Common.ExtensionMethods;
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using System;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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@@ -24,250 +26,247 @@ using System.Linq;
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using System.Runtime.CompilerServices;
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using System.Windows;
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using System.Windows.Controls;
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using PdfiumViewer;
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using QuickLook.Common.ExtensionMethods;
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namespace QuickLook.Plugin.PDFViewer
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namespace QuickLook.Plugin.PDFViewer;
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/// <summary>
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/// Interaction logic for PdfViewer.xaml
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/// </summary>
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public partial class PdfViewerControl : UserControl, INotifyPropertyChanged, IDisposable
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{
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/// <summary>
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/// Interaction logic for PdfViewer.xaml
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/// </summary>
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public partial class PdfViewerControl : UserControl, INotifyPropertyChanged, IDisposable
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private int _changePageDeltaSum;
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private bool _initPage = true;
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private double _maxZoomFactor = double.NaN;
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private double _minZoomFactor = double.NaN;
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private bool _pdfLoaded;
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private double _viewRenderFactor = double.NaN;
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public PdfViewerControl()
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{
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private int _changePageDeltaSum;
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private bool _initPage = true;
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private double _maxZoomFactor = double.NaN;
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private double _minZoomFactor = double.NaN;
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InitializeComponent();
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private bool _pdfLoaded;
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private double _viewRenderFactor = double.NaN;
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// remove theme used in designer
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Resources.MergedDictionaries.RemoveAt(0);
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public PdfViewerControl()
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listThumbnails.SelectionChanged += UpdatePageViewWhenSelectionChanged;
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pagePanel.ZoomChanged += ReRenderCurrentPageDelayed;
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pagePanel.ImageScrolled += NavigatePage;
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}
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public ObservableCollection<int> PageThumbnails { get; set; } = new ObservableCollection<int>();
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public int TotalPages => PdfDocumentWrapper.PdfDocument.PageCount;
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public int CurrentPage
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{
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get => listThumbnails.SelectedIndex;
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set
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{
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InitializeComponent();
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// remove theme used in designer
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Resources.MergedDictionaries.RemoveAt(0);
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listThumbnails.SelectionChanged += UpdatePageViewWhenSelectionChanged;
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pagePanel.ZoomChanged += ReRenderCurrentPageDelayed;
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pagePanel.ImageScrolled += NavigatePage;
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}
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public ObservableCollection<int> PageThumbnails { get; set; } = new ObservableCollection<int>();
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public int TotalPages => PdfDocumentWrapper.PdfDocument.PageCount;
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public int CurrentPage
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{
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get => listThumbnails.SelectedIndex;
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set
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{
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listThumbnails.SelectedIndex = value;
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listThumbnails.ScrollIntoView(listThumbnails.SelectedItem);
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CurrentPageChanged?.Invoke(this, new EventArgs());
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OnPropertyChanged();
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}
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}
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public PdfDocumentWrapper PdfDocumentWrapper { get; private set; }
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public void Dispose()
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{
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GC.SuppressFinalize(this);
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if (pagePanel != null)
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{
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pagePanel.ZoomChanged -= ReRenderCurrentPageDelayed;
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pagePanel.ImageScrolled -= NavigatePage;
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}
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_pdfLoaded = false;
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PdfDocumentWrapper?.Dispose();
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PdfDocumentWrapper = null;
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}
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public event PropertyChangedEventHandler PropertyChanged;
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private void ReRenderCurrentPageDelayed(object sender, EventArgs e)
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{
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ReRenderCurrentPage();
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}
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public event EventHandler CurrentPageChanged;
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private void NavigatePage(object sender, int delta)
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{
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if (!_pdfLoaded)
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return;
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var pos = pagePanel.GetScrollPosition();
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var size = pagePanel.GetScrollSize();
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const double tolerance = 0.0001d;
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if (Math.Abs(pos.Y) < tolerance && delta > 0)
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{
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_changePageDeltaSum += delta;
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if (Math.Abs(_changePageDeltaSum) < 20)
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return;
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PrevPage();
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_changePageDeltaSum = 0;
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}
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else if (Math.Abs(pos.Y - size.Height) < tolerance && delta < -0)
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{
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_changePageDeltaSum += delta;
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if (Math.Abs(_changePageDeltaSum) < 20)
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return;
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NextPage();
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_changePageDeltaSum = 0;
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}
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}
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private void NextPage()
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{
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if (CurrentPage < TotalPages - 1)
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{
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CurrentPage++;
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pagePanel.ScrollToTop();
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}
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}
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private void PrevPage()
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{
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if (CurrentPage > 0)
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{
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CurrentPage--;
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pagePanel.ScrollToBottom();
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}
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}
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private void ReRenderCurrentPage()
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{
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if (!_pdfLoaded)
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return;
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if (CurrentPage < 0 || CurrentPage >= TotalPages)
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return;
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Debug.WriteLine($"Re-rendering page {CurrentPage}");
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var pos = pagePanel.GetScrollPosition();
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double factor;
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// First time showing. Set thresholds here.
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if (double.IsNaN(_minZoomFactor) || double.IsNaN(_maxZoomFactor))
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{
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factor = Math.Min(pagePanel.ActualHeight / PdfDocumentWrapper.PdfDocument.PageSizes[CurrentPage].Height,
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pagePanel.ActualWidth / PdfDocumentWrapper.PdfDocument.PageSizes[CurrentPage].Width);
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_viewRenderFactor = factor;
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_minZoomFactor = 0.1 * factor;
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_maxZoomFactor = 5 * factor;
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}
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else if (pagePanel.ZoomToFit)
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{
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factor = Math.Min(pagePanel.ActualHeight / PdfDocumentWrapper.PdfDocument.PageSizes[CurrentPage].Height,
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pagePanel.ActualWidth / PdfDocumentWrapper.PdfDocument.PageSizes[CurrentPage].Width);
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}
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else
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{
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factor = pagePanel.ZoomFactor * _viewRenderFactor;
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factor = Math.Max(factor, _minZoomFactor);
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factor = Math.Min(factor, _maxZoomFactor);
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pagePanel.MinZoomFactor = _minZoomFactor / factor;
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pagePanel.MaxZoomFactor = _maxZoomFactor / factor;
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}
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var image = PdfDocumentWrapper.Render(CurrentPage, factor);
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pagePanel.Source = image;
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pagePanel.ResetZoom();
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_viewRenderFactor = factor;
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pagePanel.SetScrollPosition(pos);
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Dispatcher.Delay(500, t => GC.Collect());
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}
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private void UpdatePageViewWhenSelectionChanged(object sender, SelectionChangedEventArgs e)
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{
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if (!_pdfLoaded)
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return;
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if (CurrentPage == -1)
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return;
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listThumbnails.SelectedIndex = value;
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listThumbnails.ScrollIntoView(listThumbnails.SelectedItem);
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CurrentPageChanged?.Invoke(this, new EventArgs());
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ReRenderCurrentPage();
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if (_initPage)
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{
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_initPage = false;
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pagePanel.DoZoomToFit();
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}
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}
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public static Size GetDesiredControlSizeByFirstPage(string path)
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{
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Size size;
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using (var s = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
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{
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using (var tempHandle = PdfDocument.Load(s))
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{
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size = new Size(0, 0);
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tempHandle.PageSizes.Take(5).ForEach(p =>
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{
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size.Width = Math.Max(size.Width, p.Width);
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size.Height = Math.Max(size.Height, p.Height);
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});
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if (tempHandle.PageCount > 1)
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size.Width += /*listThumbnails.ActualWidth*/ 150;
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}
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}
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return new Size(size.Width * 3, size.Height * 3);
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}
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public void LoadPdf(string path)
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{
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var stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
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PdfDocumentWrapper = new PdfDocumentWrapper(stream);
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_pdfLoaded = true;
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if (PdfDocumentWrapper.PdfDocument.PageCount < 2)
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listThumbnails.Visibility = Visibility.Collapsed;
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BeginLoadThumbnails();
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}
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public void LoadPdf(MemoryStream stream)
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{
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stream.Position = 0;
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PdfDocumentWrapper = new PdfDocumentWrapper(stream);
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_pdfLoaded = true;
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if (PdfDocumentWrapper.PdfDocument.PageCount < 2)
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listThumbnails.Visibility = Visibility.Collapsed;
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BeginLoadThumbnails();
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}
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private void BeginLoadThumbnails()
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{
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Enumerable.Range(0, PdfDocumentWrapper.PdfDocument.PageCount).ForEach(PageThumbnails.Add);
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}
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protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
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{
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
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OnPropertyChanged();
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}
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}
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}
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public PdfDocumentWrapper PdfDocumentWrapper { get; private set; }
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public void Dispose()
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{
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GC.SuppressFinalize(this);
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if (pagePanel != null)
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{
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pagePanel.ZoomChanged -= ReRenderCurrentPageDelayed;
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pagePanel.ImageScrolled -= NavigatePage;
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}
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_pdfLoaded = false;
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PdfDocumentWrapper?.Dispose();
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PdfDocumentWrapper = null;
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}
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public event PropertyChangedEventHandler PropertyChanged;
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private void ReRenderCurrentPageDelayed(object sender, EventArgs e)
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{
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ReRenderCurrentPage();
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}
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public event EventHandler CurrentPageChanged;
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private void NavigatePage(object sender, int delta)
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{
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if (!_pdfLoaded)
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return;
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var pos = pagePanel.GetScrollPosition();
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var size = pagePanel.GetScrollSize();
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const double tolerance = 0.0001d;
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if (Math.Abs(pos.Y) < tolerance && delta > 0)
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{
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_changePageDeltaSum += delta;
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if (Math.Abs(_changePageDeltaSum) < 20)
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return;
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PrevPage();
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_changePageDeltaSum = 0;
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}
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else if (Math.Abs(pos.Y - size.Height) < tolerance && delta < -0)
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{
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_changePageDeltaSum += delta;
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if (Math.Abs(_changePageDeltaSum) < 20)
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return;
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NextPage();
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_changePageDeltaSum = 0;
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}
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}
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private void NextPage()
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{
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if (CurrentPage < TotalPages - 1)
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{
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CurrentPage++;
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pagePanel.ScrollToTop();
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}
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}
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private void PrevPage()
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{
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if (CurrentPage > 0)
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{
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CurrentPage--;
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pagePanel.ScrollToBottom();
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}
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}
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private void ReRenderCurrentPage()
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{
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if (!_pdfLoaded)
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return;
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if (CurrentPage < 0 || CurrentPage >= TotalPages)
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return;
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Debug.WriteLine($"Re-rendering page {CurrentPage}");
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var pos = pagePanel.GetScrollPosition();
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double factor;
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// First time showing. Set thresholds here.
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if (double.IsNaN(_minZoomFactor) || double.IsNaN(_maxZoomFactor))
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{
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factor = Math.Min(pagePanel.ActualHeight / PdfDocumentWrapper.PdfDocument.PageSizes[CurrentPage].Height,
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pagePanel.ActualWidth / PdfDocumentWrapper.PdfDocument.PageSizes[CurrentPage].Width);
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_viewRenderFactor = factor;
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_minZoomFactor = 0.1 * factor;
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_maxZoomFactor = 5 * factor;
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}
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else if (pagePanel.ZoomToFit)
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{
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factor = Math.Min(pagePanel.ActualHeight / PdfDocumentWrapper.PdfDocument.PageSizes[CurrentPage].Height,
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pagePanel.ActualWidth / PdfDocumentWrapper.PdfDocument.PageSizes[CurrentPage].Width);
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}
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else
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{
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factor = pagePanel.ZoomFactor * _viewRenderFactor;
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factor = Math.Max(factor, _minZoomFactor);
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factor = Math.Min(factor, _maxZoomFactor);
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pagePanel.MinZoomFactor = _minZoomFactor / factor;
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pagePanel.MaxZoomFactor = _maxZoomFactor / factor;
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}
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var image = PdfDocumentWrapper.Render(CurrentPage, factor);
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pagePanel.Source = image;
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pagePanel.ResetZoom();
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_viewRenderFactor = factor;
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pagePanel.SetScrollPosition(pos);
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Dispatcher.Delay(500, t => GC.Collect());
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}
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private void UpdatePageViewWhenSelectionChanged(object sender, SelectionChangedEventArgs e)
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{
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if (!_pdfLoaded)
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return;
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if (CurrentPage == -1)
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return;
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CurrentPageChanged?.Invoke(this, new EventArgs());
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ReRenderCurrentPage();
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if (_initPage)
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{
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_initPage = false;
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pagePanel.DoZoomToFit();
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}
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}
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public static Size GetDesiredControlSizeByFirstPage(string path)
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{
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Size size;
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using (var s = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
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{
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using (var tempHandle = PdfDocument.Load(s))
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{
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size = new Size(0, 0);
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tempHandle.PageSizes.Take(5).ForEach(p =>
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{
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size.Width = Math.Max(size.Width, p.Width);
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size.Height = Math.Max(size.Height, p.Height);
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});
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if (tempHandle.PageCount > 1)
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size.Width += /*listThumbnails.ActualWidth*/ 150;
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}
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}
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return new Size(size.Width * 3, size.Height * 3);
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}
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public void LoadPdf(string path)
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{
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var stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
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PdfDocumentWrapper = new PdfDocumentWrapper(stream);
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_pdfLoaded = true;
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if (PdfDocumentWrapper.PdfDocument.PageCount < 2)
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listThumbnails.Visibility = Visibility.Collapsed;
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BeginLoadThumbnails();
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}
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public void LoadPdf(MemoryStream stream)
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{
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stream.Position = 0;
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PdfDocumentWrapper = new PdfDocumentWrapper(stream);
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_pdfLoaded = true;
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if (PdfDocumentWrapper.PdfDocument.PageCount < 2)
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listThumbnails.Visibility = Visibility.Collapsed;
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BeginLoadThumbnails();
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}
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private void BeginLoadThumbnails()
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{
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Enumerable.Range(0, PdfDocumentWrapper.PdfDocument.PageCount).ForEach(PageThumbnails.Add);
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}
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protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
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{
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
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}
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}
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Reference in New Issue
Block a user