mirror of
https://github.com/sourcegit-scm/sourcegit.git
synced 2024-11-04 12:43:25 -08:00
638 lines
25 KiB
C#
638 lines
25 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Globalization;
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using System.Text;
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using System.Threading.Tasks;
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using System.Windows;
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using System.Windows.Controls;
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using System.Windows.Data;
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using System.Windows.Input;
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using System.Windows.Media;
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using System.Windows.Shapes;
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namespace SourceGit.Views.Widgets {
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/// <summary>
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/// 变更对比视图
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/// </summary>
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public partial class DiffViewer : UserControl {
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private static readonly Brush BG_EMPTY = new SolidColorBrush(Color.FromArgb(40, 0, 0, 0));
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private static readonly Brush BG_ADDED = new SolidColorBrush(Color.FromArgb(60, 0, 255, 0));
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private static readonly Brush BG_DELETED = new SolidColorBrush(Color.FromArgb(60, 255, 0, 0));
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private static readonly Brush BG_NORMAL = Brushes.Transparent;
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public class Option {
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public string[] RevisionRange = new string[] { };
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public string Path = "";
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public string OrgPath = null;
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public string ExtraArgs = "";
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}
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public class Block {
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public string Content { get; set; }
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public Models.TextChanges.LineMode Mode { get; set; }
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public Brush BG { get; set; }
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public Brush FG { get; set; }
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public FontStyle Style { get; set; }
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public string OldLine { get; set; }
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public string NewLine { get; set; }
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public bool IsContent {
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get {
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return Mode == Models.TextChanges.LineMode.Added
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|| Mode == Models.TextChanges.LineMode.Deleted
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|| Mode == Models.TextChanges.LineMode.Normal;
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}
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}
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public bool IsDifference {
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get {
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return Mode == Models.TextChanges.LineMode.Added
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|| Mode == Models.TextChanges.LineMode.Deleted
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|| Mode == Models.TextChanges.LineMode.None;
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}
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}
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}
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private ulong seq = 0;
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private string repo = null;
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private Option opt = null;
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private List<Models.TextChanges.Line> cachedTextChanges = null;
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private List<DataGrid> editors = new List<DataGrid>();
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private List<Rectangle> splitters = new List<Rectangle>();
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public DiffViewer() {
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InitializeComponent();
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Reset();
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}
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public void Reload() {
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if (repo == null || opt == null) {
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Reset();
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} else {
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Diff(repo, opt);
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}
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}
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public void Reset() {
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seq++;
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mask.Visibility = Visibility.Visible;
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toolbar.Visibility = Visibility.Collapsed;
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noChange.Visibility = Visibility.Collapsed;
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sizeChange.Visibility = Visibility.Collapsed;
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ClearCache();
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foreach (var e in editors) e.ItemsSource = null;
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foreach (var s in splitters) s.Visibility = Visibility.Hidden;
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}
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public void Diff(string repo, Option opt) {
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seq++;
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mask.Visibility = Visibility.Collapsed;
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noChange.Visibility = Visibility.Collapsed;
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sizeChange.Visibility = Visibility.Collapsed;
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toolbar.Visibility = Visibility.Visible;
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loading.Visibility = Visibility.Visible;
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loading.IsAnimating = true;
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SetTitle(opt.Path, opt.OrgPath);
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ClearCache();
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this.repo = repo;
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this.opt = opt;
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var dummy = seq;
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Task.Run(() => {
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var args = $"{opt.ExtraArgs} ";
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if (opt.RevisionRange.Length > 0) args += $"{opt.RevisionRange[0]} ";
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if (opt.RevisionRange.Length > 1) args += $"{opt.RevisionRange[1]} ";
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args += "-- ";
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if (!string.IsNullOrEmpty(opt.OrgPath)) args += $"\"{opt.OrgPath}\" ";
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args += $"\"{opt.Path}\"";
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var isLFSObject = new Commands.IsLFSFiltered(repo, opt.Path).Result();
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if (isLFSObject) {
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var lc = new Commands.QueryLFSObjectChange(repo, args).Result();
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if (lc.IsValid) {
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SetLFSChange(lc, dummy);
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} else {
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SetSame(dummy);
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}
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return;
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}
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var rs = new Commands.Diff(repo, args).Result();
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if (rs.IsBinary) {
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var fsc = new Commands.QueryFileSizeChange(repo, opt.RevisionRange, opt.Path, opt.OrgPath).Result();
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SetSizeChange(fsc, dummy);
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} else if (rs.Lines.Count > 0) {
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cachedTextChanges = rs.Lines;
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SetTextChange(dummy);
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} else {
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SetSame(dummy);
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}
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});
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}
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#region LAYOUT_DATA
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private void SetTitle(string file, string orgFile) {
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txtFileName.Text = file;
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if (!string.IsNullOrEmpty(orgFile) && orgFile != "/dev/null") {
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orgFileNamePanel.Visibility = Visibility.Visible;
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txtOrgFileName.Text = orgFile;
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} else {
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orgFileNamePanel.Visibility = Visibility.Collapsed;
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}
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}
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private void SetTextChange(ulong dummy) {
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if (cachedTextChanges == null) return;
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if (Models.Preference.Instance.Window.UseCombinedDiff) {
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MakeCombinedViewer(dummy);
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} else {
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MakeSideBySideViewer(dummy);
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}
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}
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private void SetSizeChange(Models.FileSizeChange fsc, ulong dummy) {
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Dispatcher.Invoke(() => {
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if (dummy != seq) return;
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loading.Visibility = Visibility.Collapsed;
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mask.Visibility = Visibility.Collapsed;
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toolbarOptions.Visibility = Visibility.Collapsed;
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sizeChange.Visibility = Visibility.Visible;
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txtSizeChangeTitle.Text = App.Text("Diff.Binary");
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iconSizeChange.Data = FindResource("Icon.Binary") as Geometry;
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txtOldSize.Text = App.Text("Bytes", fsc.OldSize);
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txtNewSize.Text = App.Text("Bytes", fsc.NewSize);
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});
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}
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private void SetLFSChange(Models.LFSChange lc, ulong dummy) {
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Dispatcher.Invoke(() => {
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if (dummy != seq) return;
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var oldSize = lc.Old == null ? 0 : lc.Old.Size;
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var newSize = lc.New == null ? 0 : lc.New.Size;
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loading.Visibility = Visibility.Collapsed;
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mask.Visibility = Visibility.Collapsed;
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toolbarOptions.Visibility = Visibility.Collapsed;
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sizeChange.Visibility = Visibility.Visible;
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txtSizeChangeTitle.Text = App.Text("Diff.LFS");
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iconSizeChange.Data = FindResource("Icon.LFS") as Geometry;
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txtNewSize.Text = App.Text("Bytes", newSize);
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txtOldSize.Text = App.Text("Bytes", oldSize);
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});
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}
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private void SetSame(ulong dummy) {
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Dispatcher.Invoke(() => {
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if (dummy != seq) return;
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loading.Visibility = Visibility.Collapsed;
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mask.Visibility = Visibility.Collapsed;
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toolbarOptions.Visibility = Visibility.Collapsed;
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noChange.Visibility = Visibility.Visible;
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});
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}
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private void MakeCombinedViewer(ulong dummy) {
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var fgCommon = FindResource("Brush.FG1") as Brush;
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var fgIndicator = FindResource("Brush.FG2") as Brush;
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var lastOldLine = "";
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var lastNewLine = "";
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var blocks = new List<Block>();
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foreach (var line in cachedTextChanges) {
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var block = new Block();
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block.Content = line.Content;
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block.Mode = line.Mode;
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block.BG = GetLineBackground(line);
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block.FG = block.IsContent ? fgCommon : fgIndicator;
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block.Style = block.IsContent ? FontStyles.Normal : FontStyles.Italic;
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block.OldLine = line.OldLine;
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block.NewLine = line.NewLine;
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if (line.OldLine.Length > 0) lastOldLine = line.OldLine;
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if (line.NewLine.Length > 0) lastNewLine = line.NewLine;
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blocks.Add(block);
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}
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Dispatcher.Invoke(() => {
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if (dummy != seq) return;
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loading.Visibility = Visibility.Collapsed;
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mask.Visibility = Visibility.Collapsed;
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toolbarOptions.Visibility = Visibility.Visible;
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var createEditor = editors.Count == 0;
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var lineNumberWidth = CalcLineNumberColWidth(lastOldLine, lastNewLine);
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var minWidth = textDiff.ActualWidth - lineNumberWidth * 2;
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if (textDiff.ActualHeight < cachedTextChanges.Count * 16) minWidth -= 8;
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DataGrid editor;
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if (createEditor) {
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editor = CreateTextEditor(new string[] { "OldLine", "NewLine" });
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editor.SetValue(Grid.ColumnProperty, 0);
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editor.SetValue(Grid.ColumnSpanProperty, 2);
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editors.Add(editor);
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textDiff.Children.Add(editor);
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AddSplitter(0, Math.Floor(lineNumberWidth));
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AddSplitter(0, Math.Floor(lineNumberWidth) * 2);
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} else {
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editor = editors[0];
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splitters[0].Margin = new Thickness(Math.Floor(lineNumberWidth), 0, 0, 0);
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splitters[1].Margin = new Thickness(Math.Floor(lineNumberWidth) * 2, 0, 0, 0);
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}
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foreach (var s in splitters) s.Visibility = Visibility.Visible;
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editor.Columns[0].Width = new DataGridLength(lineNumberWidth, DataGridLengthUnitType.Pixel);
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editor.Columns[1].Width = new DataGridLength(lineNumberWidth, DataGridLengthUnitType.Pixel);
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editor.Columns[2].MinWidth = minWidth;
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editor.SetBinding(DataGrid.ItemsSourceProperty, new Binding() { Source = blocks, IsAsync = true });
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});
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}
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private void MakeSideBySideViewer(ulong dummy) {
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var fgCommon = FindResource("Brush.FG1") as Brush;
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var fgIndicator = FindResource("Brush.FG2") as Brush;
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var lastOldLine = "";
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var lastNewLine = "";
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var oldSideBlocks = new List<Block>();
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var newSideBlocks = new List<Block>();
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foreach (var line in cachedTextChanges) {
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var block = new Block();
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block.Content = line.Content;
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block.Mode = line.Mode;
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block.BG = GetLineBackground(line);
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block.FG = block.IsContent ? fgCommon : fgIndicator;
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block.Style = block.IsContent ? FontStyles.Normal : FontStyles.Italic;
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block.OldLine = line.OldLine;
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block.NewLine = line.NewLine;
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if (line.OldLine.Length > 0) lastOldLine = line.OldLine;
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if (line.NewLine.Length > 0) lastNewLine = line.NewLine;
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switch (line.Mode) {
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case Models.TextChanges.LineMode.Added:
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newSideBlocks.Add(block);
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break;
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case Models.TextChanges.LineMode.Deleted:
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oldSideBlocks.Add(block);
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break;
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default:
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FillEmptyLines(oldSideBlocks, newSideBlocks);
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oldSideBlocks.Add(block);
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newSideBlocks.Add(block);
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break;
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}
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}
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FillEmptyLines(oldSideBlocks, newSideBlocks);
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Dispatcher.Invoke(() => {
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if (dummy != seq) return;
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loading.Visibility = Visibility.Collapsed;
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mask.Visibility = Visibility.Collapsed;
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toolbarOptions.Visibility = Visibility.Visible;
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var createEditor = editors.Count == 0;
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var lineNumberWidth = CalcLineNumberColWidth(lastOldLine, lastNewLine);
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var minWidth = textDiff.ActualWidth / 2 - lineNumberWidth;
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if (textDiff.ActualHeight < newSideBlocks.Count * 16) minWidth -= 8;
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DataGrid oldEditor, newEditor;
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if (createEditor) {
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oldEditor = CreateTextEditor(new string[] { "OldLine" });
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oldEditor.SetValue(Grid.ColumnProperty, 0);
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oldEditor.AddHandler(ScrollViewer.ScrollChangedEvent, new ScrollChangedEventHandler(OnTextDiffSyncScroll));
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newEditor = CreateTextEditor(new string[] { "NewLine" });
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newEditor.SetValue(Grid.ColumnProperty, 1);
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newEditor.AddHandler(ScrollViewer.ScrollChangedEvent, new ScrollChangedEventHandler(OnTextDiffSyncScroll));
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editors.Add(oldEditor);
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editors.Add(newEditor);
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textDiff.Children.Add(oldEditor);
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textDiff.Children.Add(newEditor);
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AddSplitter(0, Math.Floor(lineNumberWidth));
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AddSplitter(1, 0);
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AddSplitter(1, Math.Floor(lineNumberWidth));
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} else {
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oldEditor = editors[0];
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newEditor = editors[1];
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splitters[0].Margin = new Thickness(Math.Floor(lineNumberWidth), 0, 0, 0);
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splitters[2].Margin = new Thickness(Math.Floor(lineNumberWidth), 0, 0, 0);
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}
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foreach (var s in splitters) s.Visibility = Visibility.Visible;
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oldEditor.Columns[0].Width = new DataGridLength(lineNumberWidth, DataGridLengthUnitType.Pixel);
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oldEditor.Columns[1].MinWidth = minWidth;
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oldEditor.SetBinding(DataGrid.ItemsSourceProperty, new Binding() { Source = oldSideBlocks, IsAsync = true });
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newEditor.Columns[0].Width = new DataGridLength(lineNumberWidth, DataGridLengthUnitType.Pixel);
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newEditor.Columns[1].MinWidth = minWidth;
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newEditor.SetBinding(DataGrid.ItemsSourceProperty, new Binding() { Source = newSideBlocks, IsAsync = true });
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});
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}
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private Brush GetLineBackground(Models.TextChanges.Line line) {
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switch (line.Mode) {
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case Models.TextChanges.LineMode.Added:
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return BG_ADDED;
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case Models.TextChanges.LineMode.Deleted:
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return BG_DELETED;
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default:
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return BG_NORMAL;
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}
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}
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private void FillEmptyLines(List<Block> old, List<Block> cur) {
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if (old.Count < cur.Count) {
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int diff = cur.Count - old.Count;
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for (int i = 0; i < diff; i++) {
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var empty = new Block();
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empty.Content = "";
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empty.Mode = Models.TextChanges.LineMode.None;
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empty.BG = BG_EMPTY;
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empty.FG = Brushes.Transparent;
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empty.Style = FontStyles.Normal;
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empty.OldLine = "";
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empty.NewLine = "";
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old.Add(empty);
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}
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} else if (old.Count > cur.Count) {
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int diff = old.Count - cur.Count;
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for (int i = 0; i < diff; i++) {
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var empty = new Block();
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empty.Content = "";
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empty.Mode = Models.TextChanges.LineMode.None;
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empty.BG = BG_EMPTY;
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empty.FG = Brushes.Transparent;
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empty.Style = FontStyles.Normal;
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empty.OldLine = "";
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empty.NewLine = "";
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cur.Add(empty);
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}
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}
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}
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private void AddSplitter(int column, double offset) {
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var split = new Rectangle();
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split.Width = 1;
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split.Fill = FindResource("Brush.Border2") as Brush;
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split.HorizontalAlignment = HorizontalAlignment.Left;
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split.Margin = new Thickness(offset, 0, 0, 0);
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split.SetValue(Grid.ColumnProperty, column);
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textDiff.Children.Add(split);
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splitters.Add(split);
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}
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private DataGrid CreateTextEditor(string[] lineNumbers) {
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var grid = new DataGrid();
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grid.EnableRowVirtualization = true;
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grid.EnableColumnVirtualization = true;
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grid.RowHeight = 16.0;
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grid.FrozenColumnCount = lineNumbers.Length;
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grid.ContextMenuOpening += OnTextDiffContextMenuOpening;
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grid.RowStyle = FindResource("Style.DataGridRow.DiffViewer") as Style;
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grid.CommandBindings.Add(new CommandBinding(ApplicationCommands.Copy, (o, e) => {
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var items = (o as DataGrid).SelectedItems;
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if (items.Count == 0) return;
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var builder = new StringBuilder();
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foreach (var item in items) {
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var block = item as Block;
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if (block == null) continue;
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if (!block.IsContent) continue;
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builder.Append(block.Content);
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builder.AppendLine();
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}
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Clipboard.SetText(builder.ToString());
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}));
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foreach (var number in lineNumbers) {
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var colLineNumber = new DataGridTextColumn();
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colLineNumber.IsReadOnly = true;
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colLineNumber.Binding = new Binding(number);
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colLineNumber.ElementStyle = FindResource("Style.TextBlock.LineNumber") as Style;
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grid.Columns.Add(colLineNumber);
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}
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var borderContent = new FrameworkElementFactory(typeof(Border));
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borderContent.SetBinding(Border.BackgroundProperty, new Binding("BG"));
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var textContent = new FrameworkElementFactory(typeof(TextBlock));
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textContent.SetBinding(TextBlock.TextProperty, new Binding("Content"));
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textContent.SetBinding(TextBlock.ForegroundProperty, new Binding("FG"));
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textContent.SetBinding(TextBlock.FontStyleProperty, new Binding("Style"));
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textContent.SetValue(TextBlock.BackgroundProperty, Brushes.Transparent);
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textContent.SetValue(TextBlock.FontSizeProperty, 12.0);
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textContent.SetValue(TextBlock.MarginProperty, new Thickness(0));
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textContent.SetValue(TextBlock.PaddingProperty, new Thickness(4, 0, 0, 0));
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var visualTree = new FrameworkElementFactory(typeof(Grid));
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visualTree.AppendChild(borderContent);
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visualTree.AppendChild(textContent);
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var colContent = new DataGridTemplateColumn();
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colContent.CellTemplate = new DataTemplate();
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colContent.CellTemplate.VisualTree = visualTree;
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colContent.Width = DataGridLength.SizeToCells;
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grid.Columns.Add(colContent);
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return grid;
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}
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private double CalcLineNumberColWidth(string oldLine, string newLine) {
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var number = oldLine;
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if (newLine.Length > oldLine.Length) number = newLine;
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var formatted = new FormattedText(
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number,
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CultureInfo.CurrentCulture,
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FlowDirection.LeftToRight,
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new Typeface(FontFamily, FontStyles.Normal, FontWeights.Normal, FontStretches.Normal),
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12.0,
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Brushes.Black,
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VisualTreeHelper.GetDpi(this).PixelsPerDip);
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return formatted.Width + 16;
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}
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private void ClearCache() {
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repo = null;
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opt = null;
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cachedTextChanges = null;
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}
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private T GetVisualChild<T>(DependencyObject parent) where T : Visual {
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T child = null;
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int count = VisualTreeHelper.GetChildrenCount(parent);
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for (int i = 0; i < count; i++) {
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Visual v = (Visual)VisualTreeHelper.GetChild(parent, i);
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child = v as T;
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if (child == null) {
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child = GetVisualChild<T>(v);
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}
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if (child != null) {
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break;
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}
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}
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return child;
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}
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#endregion
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#region EVENTS
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private void OnDiffViewModeChanged(object sender, RoutedEventArgs e) {
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if (editors.Count > 0) {
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editors.Clear();
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splitters.Clear();
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textDiff.Children.Clear();
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SetTextChange(seq);
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}
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}
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private void OnTextDiffSizeChanged(object sender, SizeChangedEventArgs e) {
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if (editors.Count == 0) return;
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var total = textDiff.ActualWidth / editors.Count;
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for (int i = 0; i < editors.Count; i++) {
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var editor = editors[i];
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var minWidth = total - editor.NonFrozenColumnsViewportHorizontalOffset;
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if (editor.Items.Count * 16 > textDiff.ActualHeight) minWidth -= 8;
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var lastColumn = editor.Columns.Count - 1;
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editor.Columns[lastColumn].MinWidth = minWidth;
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editor.Columns[lastColumn].Width = DataGridLength.SizeToCells;
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editor.UpdateLayout();
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}
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}
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private void OnTextDiffContextMenuOpening(object sender, ContextMenuEventArgs e) {
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var grid = sender as DataGrid;
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if (grid == null) return;
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var menu = new ContextMenu();
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var copyIcon = new Path();
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copyIcon.Data = FindResource("Icon.Copy") as Geometry;
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copyIcon.Width = 10;
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var copy = new MenuItem();
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copy.Header = App.Text("Diff.Copy");
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copy.Icon = copyIcon;
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copy.Click += (o, ev) => {
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var items = grid.SelectedItems;
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if (items.Count == 0) return;
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var builder = new StringBuilder();
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foreach (var item in items) {
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var block = item as Block;
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if (block == null) continue;
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if (!block.IsContent) continue;
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builder.Append(block.Content);
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builder.AppendLine();
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}
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Clipboard.SetText(builder.ToString());
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};
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menu.Items.Add(copy);
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menu.IsOpen = true;
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e.Handled = true;
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}
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private void OnTextDiffSyncScroll(object sender, ScrollChangedEventArgs e) {
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foreach (var editor in editors) {
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var scroller = GetVisualChild<ScrollViewer>(editor);
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if (scroller == null) continue;
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if (e.VerticalChange != 0 && scroller.VerticalOffset != e.VerticalOffset) {
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scroller.ScrollToVerticalOffset(e.VerticalOffset);
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}
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if (e.HorizontalChange != 0 && scroller.HorizontalOffset != e.HorizontalOffset) {
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scroller.ScrollToHorizontalOffset(e.HorizontalOffset);
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}
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}
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}
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private void OnTextDiffBringIntoView(object sender, RequestBringIntoViewEventArgs e) {
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e.Handled = true;
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}
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private void GotoPrevChange(object sender, RoutedEventArgs e) {
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if (editors.Count == 0) return;
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var grid = editors[0];
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var scroller = GetVisualChild<ScrollViewer>(grid);
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if (scroller == null) return;
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var firstVisible = (int)scroller.VerticalOffset;
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var firstModeEnded = false;
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var first = grid.Items[firstVisible] as Block;
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for (int i = firstVisible - 1; i >= 0; i--) {
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var next = grid.Items[i] as Block;
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if (next.IsDifference) {
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if (firstModeEnded || next.Mode != first.Mode) {
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scroller.ScrollToVerticalOffset(i);
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break;
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}
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} else {
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firstModeEnded = true;
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}
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}
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}
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private void GotoNextChange(object sender, RoutedEventArgs e) {
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if (editors.Count == 0) return;
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var grid = editors[0];
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var scroller = GetVisualChild<ScrollViewer>(grid);
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if (scroller == null) return;
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var firstVisible = (int)scroller.VerticalOffset;
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var firstModeEnded = false;
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var first = grid.Items[firstVisible] as Block;
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for (int i = firstVisible + 1; i < grid.Items.Count; i++) {
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var next = grid.Items[i] as Block;
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if (next.IsDifference) {
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if (firstModeEnded || next.Mode != first.Mode) {
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scroller.ScrollToVerticalOffset(i);
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break;
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}
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} else {
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firstModeEnded = true;
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}
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}
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}
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#endregion
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}
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}
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