基于CefSharp开发浏览器（九）浏览器历史记录弹窗面板

一、前言

前两篇文章写的是关于浏览器收藏夹的内容，因为收藏夹的内容不会太多，故采用json格式的文本文件作为收藏夹的存储方式。

关于浏览器历史记录，我个人每天大概会打开百来次网页甚至更多，时间越长历史记录会越多多。此时使用json存储一旦数据量加大，势必会影响效率。

故需要选择一个新的存储方式。展开思考：Edge是用什么存储的呢？

二、探究Edge历史记录存储方式

经过几番查找终于找到Edge数据存储位置：C:Users用户AppDataLocalMicrosoftEdgeUser DataDefault

浏览一下看看是否有所需的文件，咦？发现了Bookmarks,这应该是存储收藏夹数据的吧，尝试打开看看

使用Notepad++打开看看，咦，这不巧了吗？竟然也是json存储。和之前收藏夹的存储想法不谋而合。

Edge历史记录该不会也是json存储吧? 令人担忧

继续浏览该目录，这应该就是保存历史记录的

 打开看看：

 心里松了一口气，还好不是Json。

那究竟是怎样存储的呢？可以看到该文件的第一行 “SQLite format”，它可能是一个SQLite数据库文件。

使用SQLiteSpy打开看看,A我去了，果然是SQLite数据库文件。

个人猜测 Downloads存储的是下载历史，keyword_search_terms是搜索历史

visit存储访问历史，也就是我们所需要的历史记录。打开visit，

虽然没直接存储url，但有url的id,打开urls表

揍是它，到此可以得出：Edge的历史记录存储在SQLite 格式的文件中。那好，我们也使用SQLite作为历史记录的存储方式。

三、数据存储设计

上面已分析出Edge的历史记录存储方式，这里照葫芦画瓢也采用SQLite存储数据。

ORM框架选型，.Net 的ORM框架有很多。如SqlSugar、Dos.ORM、Entity Framework 、NHibernate等等。

近两年 SqlSugar总体评价较好，这里采用SqlSugar，官方文档：http://donet5.com/Home/Doc

NuGet Package Manager中添加 SqlSugarCore引用：

新建HistoryModel 用户存储历史记录，目前只建一张表。后期有需要在按需扩展。

[SugarTable("history", "f10")]
public class HistoryModel
{
    [SugarColumn(ColumnName = "id", IsPrimaryKey = true, IsIdentity = true)]
    public int Id { get; set; }
    public string Title { get; set; }
    public string Url { get; set; }
    public DateTime VisitTime { get; set; }
    public int FormVisit { get; set; }
}

新建 DbContext用于配置 SqlSugarClient

public class DbContext
{
    private SqlSugarClient _db;
    public SqlSugarClient Db
    {
        get => _db;
        private set => _db = value;
    }
    public DbContext()
    {
        string connStr = $"DataSource={Environment.CurrentDirectory}\History.db";
        ConnectionConfig config = new ConnectionConfig
        {
            ConnectionString = connStr,
            DbType = DbType.Sqlite,
            InitKeyType = InitKeyType.Attribute,
            IsAutoCloseConnection = true,
        };
        _db = new SqlSugarClient(config);
    }
}

新建 DbSeed用于数据库初始化

public static class DbSeed
{
    private static readonly DbContext _context;
    static DbSeed()
    {
        _context = new DbContext();
    }
    public static void InitData()
    {
        //创建数据库
        _context.Db.DbMaintenance.CreateDatabase();

        //创建表，反射获取指定数据表
        var modelTypes = from table in Assembly.GetExecutingAssembly().GetTypes()
            where table.IsClass && table.Namespace == "Cys_Model.Tables"
            select table;

        foreach (var t in modelTypes.ToList())
        {
            if (_context.Db.DbMaintenance.IsAnyTable(t.Name)) continue;
            _context.Db.CodeFirst.InitTables(t);
        }
    }
}

四、历史记录界面设计

首先看看Edge历史记录弹窗面板，如图所示：

 可分为上下两部分

上半部分分为搜索，子菜单，固定到右侧（本章暂不处理）

下半部分为数据列表（本章完成这一部分）

 Edge的历史记录弹窗面板的外部展示方式与收藏夹菜单类似也是弹窗，可以采用Popup实现。新建HistoryUc用户控件，代码如下：

<UserControl x:Class="MWebBrowser.View.HistoryUc"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:history="clr-namespace:MWebBrowser.View.History"
             mc:Ignorable="d" d:DesignHeight="30" d:DesignWidth="40">
    <Grid>
        <Grid.Resources>
            <DataTemplate x:Key="ListBoxTemplate">
                <history:HistoryItemUc/>
            </DataTemplate>
        </Grid.Resources>
        <ToggleButton x:Name="HistoryButton" Style="{DynamicResource ToggleButton.FontButton}" Checked="HistoryButton_OnChecked"
                      Unchecked="HistoryButton_OnUnchecked" Content="&#xe786;" FontSize="32" Background="Transparent" IsChecked="{Binding ElementName=FavoritesPop,Path=IsOpen}"/>
        <Popup x:Name="FavoritesPop" PopupAnimation="Fade" Placement="Bottom"  PlacementTarget="{Binding ElementName=FavoritesButton}"
               StaysOpen="False" AllowsTransparency="True" HorizontalOffset="-330">
            <Border x:Name="PopBorder" Background="{DynamicResource WebBrowserBrushes.WebMenuBackground}" CornerRadius="5">
                <Border.Effect>
                    <DropShadowEffect Color="{DynamicResource Color.MenuItemDropShadowBrush}" Opacity="0.3" ShadowDepth="3"/>
                </Border.Effect>
                <Grid Width="360" Height="660">
                    <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                        <RowDefinition Height="1"/>
                        <RowDefinition Height="*"/>
                    </Grid.RowDefinitions>
                    <Grid Grid.Row="0" Height="40">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>
                        <TextBlock Grid.Column="0" Text="历史记录" VerticalAlignment="Center" FontSize="18" Margin="10,0,0,0" Foreground="{DynamicResource WebBrowserBrushes.DefaultForeground}"/>
                    </Grid>
                    <Rectangle Grid.Row="1" Height="1" Fill="{DynamicResource WebBrowserBrushes.WebMenuDivideLine}"/>
                    <ListBox Grid.Row="2" x:Name="HistoryListBox" ItemsSource="{Binding HistoryList}" Background="Transparent" ItemTemplate="{StaticResource ListBoxTemplate}" Style="{DynamicResource CustomListBox.HistoryListBox}"/>
                </Grid>
            </Border>
        </Popup>
    </Grid>
</UserControl>
View Code

HistoryButton 控制Popup开闭。Popup中 添加 ListBox用于展示数据列

HistoryUc.xaml.cs代码：

using Cys_Controls.Code;
using MWebBrowser.ViewModel;
using System.Windows.Controls;

namespace MWebBrowser.View
{
    /// <summary>
    /// Interaction logic for HistoryUc.xaml
    /// </summary>
    public partial class HistoryUc : UserControl
    {
        private readonly HistoryViewModel _viewModel;
        private double _offset;
        public HistoryUc()
        {
            InitializeComponent();
            _viewModel = new HistoryViewModel();
            this.DataContext = _viewModel;
            HistoryListBox.DataContext = _viewModel;
        }
        private void ScrollChanged(object sender, ScrollChangedEventArgs e)
        {
            if (!(sender is ScrollViewer scrollViewer)) return;
            if (_offset > scrollViewer.VerticalOffset) return;
            _offset = scrollViewer.VerticalOffset;
            if ((int)scrollViewer.VerticalOffset >= (scrollViewer.ScrollableHeight - 3))
            {
                _viewModel.GetHistoryList();
            }
        }
        private void HistoryButton_OnChecked(object sender, System.Windows.RoutedEventArgs e)
        {
            _viewModel.ReSet();
            _viewModel.GetHistoryList();
            ScrollViewer sv = ControlHelper.FindVisualChild<ScrollViewer>(HistoryListBox);
            if (sv != null)
            {
                sv.ScrollChanged -= ScrollChanged;
                sv.ScrollChanged += ScrollChanged;
            }
        }

        private void HistoryButton_OnUnchecked(object sender, System.Windows.RoutedEventArgs e)
        {

        }
    }
}
View Code

这里需要注意由于历史记录比较多，故需要采用分页处理，当前采用的是滚动条即将触底时获取数据，每次获取20条。 

需要自定义ListBoxItem的外观，创建HistoryItemUc

<UserControl x:Class="MWebBrowser.View.History.HistoryItemUc"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             mc:Ignorable="d" 
             d:DesignHeight="40" d:DesignWidth="400">
    <Grid Height="40">
        <!--<TextBlock Text="{Binding PublishTimeStr}" FontWeight="Bold" FontSize="16" Foreground="#FFFFFF" Visibility="{Binding GroupVisible}"/>-->
        <Grid>
            <Grid Margin="5,0">
                <Border Margin="0,0,20,0" MaxWidth="350" CornerRadius="5" Background="{Binding BackColorBrush}"  MouseEnter="History_OnMouseEnter" MouseLeave="History_OnMouseLeave" MouseLeftButtonDown="History_OnMouseLeftButtonDown" Cursor="Hand">
                    <Grid Margin="10,0">
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto"/>
                            <ColumnDefinition Width="*"/>
                            <ColumnDefinition Width="Auto"/>
                        </Grid.ColumnDefinitions>
                        <Image Width="16" Height="16" Grid.Column="0" Source="{Binding Favicon}"/>
                        <TextBlock Margin="10,0,0,0" Grid.Column="1" FontSize="14" TextTrimming="CharacterEllipsis" Foreground="#FFFFFF" Text="{Binding Title}"  HorizontalAlignment="Left" VerticalAlignment="Center"/>
                        <TextBlock TextTrimming="CharacterEllipsis" Margin="10,0,0,0" Visibility="{Binding DateVisible}" Grid.Column="2" Text="{Binding VisitTimeStr}" VerticalAlignment="Center" Foreground="{DynamicResource WebBrowserBrushes.HistoryDateForeground}"/>
                        <Button Visibility="{Binding CloseVisible}" Grid.Column="2" Margin="10,0,0,0" Style="{DynamicResource Button.DownloadCloseButton}" Click="Delete_OnClick" VerticalAlignment="Center"/>
                    </Grid>
                </Border>
            </Grid>
        </Grid>
    </Grid>
</UserControl>
View Code

HistoryItemUc.xaml.cs代码如下：

using Cys_Controls.Code;
using MWebBrowser.ViewModel;
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Input;
using System.Windows.Media;

namespace MWebBrowser.View.History
{
    /// <summary>
    /// Interaction logic for HistoryItemUc.xaml
    /// </summary>
    public partial class HistoryItemUc : UserControl
    {
        public HistoryItemUc()
        {
            InitializeComponent();
        }

        private void History_OnMouseEnter(object sender, MouseEventArgs e)
        {
            if (!(this.DataContext is HistoryItemViewModel viewModel)) return;

            viewModel.BackColorBrush = Application.Current.MainWindow?.FindResource("WebBrowserBrushes.HistoryBackgroundOver") as SolidColorBrush;
            viewModel.DateVisible = Visibility.Collapsed;
            viewModel.CloseVisible = Visibility.Visible;
        }

        private void History_OnMouseLeave(object sender, MouseEventArgs e)
        {
            if (!(this.DataContext is HistoryItemViewModel viewModel)) return;

            viewModel.BackColorBrush = Application.Current.MainWindow?.FindResource("WebBrowserBrushes.HistoryBackground") as SolidColorBrush;
            viewModel.DateVisible = Visibility.Visible;
            viewModel.CloseVisible = Visibility.Collapsed;
        }

        private void History_OnMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
        {
            if (!(this.DataContext is HistoryItemViewModel viewModel)) return;
            try
            { 
               var uc = ControlHelper.FindVisualChild<WebTabControlUc>(Application.Current.MainWindow);
               uc.TabItemAdd(viewModel.Url);
            }
            catch (Exception ex)
            {
            
            }
        }

        private void Delete_OnClick(object sender, RoutedEventArgs e)
        {
            if (!(this.DataContext is HistoryItemViewModel viewModel)) return;
            var uc = ControlHelper.FindVisualChild<WebTabControlUc>(Application.Current.MainWindow);
            var historyUc = ControlHelper.FindVisualChild<HistoryUc>(uc);
            if (historyUc?.DataContext is HistoryViewModel hvm)
            {
                hvm.DeleteHistoryItem(viewModel);
            }
        }
    }
}
View Code

五、运行效果

 

五、源码地址

gitee地址：https://gitee.com/sirius_machao/mweb-browser

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原文地址：https://www.cnblogs.com/mchao/p/14478602.html