基于CefSharp开发浏览器（七）浏览器收藏夹菜单

一、Edge收藏夹菜单分析

如下图所示为Edge收藏夹菜单，点击收藏夹菜单按钮（红框部分）弹出收藏夹菜单窗体，窗体中包含工具栏（绿框部分）和树型菜单（黄框部分）

工具栏按钮功能分别为添加当前网页到根节点、创建新文件夹到根节点、搜索收藏夹内容、单中单（收藏夹菜单中的其他功能）、收藏夹菜单固定到右侧

在树节点上右键，有如下右键菜单功能

要完成此功能，需先仿其形，再谋其神。

二、仿其形

这里所谓的仿其形，即模仿它的样式（Style）

1、创建收藏夹菜单UserControl

创建FavoritesMenuUc，Grid内容如下：ToggleButton控制菜单显隐，Popup展示弹出菜单，

StackPanel 中添加五个按钮用于实现工具栏中的功能，MTreeView用于实现树型菜单

关于MTreeView的实现请参照 Cys_Control（六） MTreeView

<Grid>
    <ToggleButton x:Name="FavoritesButton" Style="{DynamicResource ToggleButton.FontButton}" Checked="FavoritesButton_OnChecked"
                      Unchecked="FavoritesButton_OnUnchecked" Content="" FontSize="26" 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 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="收藏夹栏" VerticalAlignment="Center" FontSize="18" Margin="10,0,0,0" Foreground="{DynamicResource WebBrowserBrushes.DefaultForeground}"/>
                    <StackPanel Grid.Column="2" Orientation="Horizontal" Margin="0,0,10,0">
                        <Button Style="{DynamicResource Button.FontButton}" Content=""/>
                        <Button Style="{DynamicResource Button.FontButton}" Content=""/>
                        <Button Style="{DynamicResource Button.FontButton}" Content=""/>
                        <Button Style="{DynamicResource Button.FontButton}" Content="..." Padding="0,0,0,12"/>
                        <Button Style="{DynamicResource Button.FontButton}" Content=""/>
                    </StackPanel>
                </Grid>
                <Rectangle Grid.Row="1" Height="1" Fill="{DynamicResource WebBrowserBrushes.WebMenuDivideLine}"/>
                <controls:MTreeView Grid.Row="2" x:Name="FavoritesTree"/>
            </Grid>
        </Border>
    </Popup>
</Grid>

新建类TreeNode用于显示TreeView显示

public class TreeNode
{
    public int NodeId { get; set; }
    public int ParentId { get; set; }
    public string NodeName { get; set; }
    public string Url { get; set; } = "http://www.baidu.com";
    public List<TreeNode> ChildNodes { get; set; } = new List<TreeNode>();
    public int Type { get; set; } //0-文件，1-文件夹
}

FavoritesMenuUc.xaml.cs文件中增加测试数据

private void GetFavoritesInfo()
{
    nodes = new List<TreeNode>()
            {
                new TreeNode(){ParentId=-1, NodeId=0, NodeName = "收藏夹",Type = 1},
                new TreeNode(){ParentId=0, NodeId=1, NodeName = "文本",Type = 1},
                new TreeNode(){ParentId=0, NodeId=2, NodeName = "音频",Type = 1},
                new TreeNode(){ParentId=0, NodeId=3, NodeName = "视频",Type = 1},

                new TreeNode(){ParentId=1, NodeId=11, NodeName = "文本1",Type = 0},
                new TreeNode(){ParentId=1, NodeId=12, NodeName = "文本2",Type = 0},
                new TreeNode(){ParentId=1, NodeId=13, NodeName = "文本3",Type = 0},
            };
    List<TreeNode> root = GetNodes(-1, nodes);
    AddTreeViewItems(null, root[0], true);
}

private List<TreeNode> GetNodes(int parentId, List<TreeNode> nodes)
{
    List<TreeNode> mainNodes = nodes.Where(x => x.ParentId == parentId).OrderByDescending(x => x.Type).ToList();
    List<TreeNode> otherNodes = nodes.Where(x => x.ParentId != parentId).OrderByDescending(x => x.Type).ToList();
    foreach (TreeNode node in mainNodes)
        node.ChildNodes = GetNodes(node.NodeId, otherNodes);
    return mainNodes;
}

private void AddTreeViewItems(MTreeViewItem parent, TreeNode treeNode, bool isRoot)
{
    var treeViewItem = new MTreeViewItem();
    if (treeNode.ChildNodes.Count <= 0)
    {
        if (treeNode.Type == 0)
        {
            treeViewItem.Header = treeNode.Url;
            treeViewItem.Icon = "\ueb1e";
            treeViewItem.IsExpandedIcon = "\ueb1e";
            treeViewItem.IconForeground = new SolidColorBrush(Color.FromRgb(255, 255, 255));
        }
        else
        {
            treeViewItem.Header = treeNode.NodeName;
        }
    }
    else
    {
        treeViewItem.Header = treeNode.NodeName;
        foreach (var child in treeNode.ChildNodes)
        {
            AddTreeViewItems(treeViewItem, child, false);
        }
    }
    if (!isRoot)
        parent.Items.Add(treeViewItem);
    else
    {
        FavoritesTree.Items.Add(treeViewItem);
    }
}

运行效果如下：

2、为MTreeView添加右键菜单

右键子菜单可使用MMneuItem，xaml样式如下

<controls:MTreeView Grid.Row="2" x:Name="FavoritesTree" ContextMenuOpening="FavoritesTree_OnContextMenuOpening">
    <controls:MTreeView.ContextMenu>
        <ContextMenu x:Name="FavoritesContextMenu" Style="{DynamicResource WebCustomMenus.DefaultContextMenu}">
            <controls:MMenuItem Tag="0" Header="全部打开（16个）" Icon=""/>
            <controls:MMenuItem Tag="1" Header="在新建窗口中全部打开（16个）" Icon=""/>
            <controls:MMenuItem Tag="2" Header="在新 InPrivate窗口全部打开（16个）" Icon=""/>
            <controls:MMenuItem Tag="4" Header="按名称排序" Icon=""/>
            <controls:MMenuItem Tag="5" Header="重命名" Icon=""/>
            <controls:MMenuItem Tag="5" Header="删除" Icon="" IconFontSize="26"/>
            <controls:MMenuItem Tag="5" Header="将当前标签页添加到文件夹" Icon=""/>
            <controls:MMenuItem Tag="5" Header="将所有标签页添加到文件夹"/>
            <controls:MMenuItem Tag="5" Header="添加文件夹" Icon=""/>
        </ContextMenu>
    </controls:MTreeView.ContextMenu>
</controls:MTreeView>

当右键未选中时增加屏蔽右键菜单

private void FavoritesTree_OnContextMenuOpening(object sender, ContextMenuEventArgs e)
{
    _currentRightItem = ControlHelper.FindVisualParent<MTreeViewItem>(e.OriginalSource as DependencyObject);
    if (null == _currentRightItem)
    {
        e.Handled = true;
    }
}

运行效果如下：

三、谋其神

这里的谋其神，就是使其可以完成正常的业务处理。

前面仿造了Edge浏览器的大致样式，接下来要对及增加数据存储、命令处理等

1、增加Favorites数据存储

这里使用同数据下载同样的处理逻辑，将收藏夹保存为Json文件

新建FavoritesDataRepository,类中添加 SaveFavoritesSetting、GetFavoritesSetting用于保存与读取数据。

public class FavoritesDataRepository
{
    public void SaveFavoritesSetting()
    {
        try
        {
            var setting = GlobalInfo.FavoritesSetting;
            if (setting == null) return;
            var fileName = FileDataPath.GetFilePath(DataFileType.Favorites);
            CommonOperator.SaveDataJson(setting, fileName);
        }
        catch (Exception ex)
        {

        }
    }

    public FavoritesSetting GetFavoritesSetting()
    {
        var fileName = FileDataPath.GetFilePath(DataFileType.Favorites);
        var setting = CommonOperator.GetDataJson<FavoritesSetting>(fileName);
        setting ??= new FavoritesSetting();
        setting.FavoritesInfos ??= new List<TreeNode>();
        if (setting.FavoritesInfos.Count <= 0)
        {
            setting.FavoritesInfos.Add(new TreeNode()
            {
                ParentId = -1,
                NodeId = 0,
                NodeName = "收藏夹",
                Type = 1,
            });
        }
        return setting;
    }
}

2、增加菜单事件

由于事件较多，目前仅处理添加文件夹、添加收藏、删除功能

添加folder,这里的if用来判断是收藏夹工具栏的按钮还是右键菜单C

private void AddFolder_OnClick(object sender, RoutedEventArgs e)
{
    if (sender is Button)
    {
        var newTreeNode = GetNewTreeNodeInfo(true, 1, "新建文件夹", null);
        if (null == FavoritesTree || FavoritesTree.Items.Count <= 0) return;
        var treeNodeUc = FavoritesTree.Items[0];
        if (!(treeNodeUc is MTreeViewItem item)) return;
        item.Items.Add(newTreeNode.Item2);
        GlobalInfo.FavoritesSetting.FavoritesInfos.Add(newTreeNode.Item1);
    }
    else if (sender is MMenuItem)
    {
        var newTreeNode = GetNewTreeNodeInfo(false, 1, "新建文件夹", null);
        if (_currentRightItem != null && _currentRightItem.Type == 1)
        {
            _currentRightItem.Items.Add(newTreeNode.Item2);
            GlobalInfo.FavoritesSetting.FavoritesInfos.Add(newTreeNode.Item1);
        }
    }
}

添加收藏，添加收藏增加了GetWebUrlEvent事件用于获取当前tab页的url;

private void AddFavorites_OnClick(object sender, RoutedEventArgs e)
{
    var model = GetWebUrlEvent?.Invoke();
    if (null == model) return;

    if (sender is Button)
    {
        if (!(FavoritesTree.Items[0] is MTreeViewItem item)) return;
        var newTreeNode = GetNewTreeNodeInfo(true, 0, model.Title, model.CurrentUrl);
        GlobalInfo.FavoritesSetting.FavoritesInfos.Add(newTreeNode.Item1);
        item.Items.Add(newTreeNode.Item2);
    }
    else if (sender is MMenuItem)
    {
        if (_currentRightItem != null && _currentRightItem.Type == 1)
        {
            var newTreeNode = GetNewTreeNodeInfo(false, 0, model.Title, model.CurrentUrl);
            _currentRightItem.Items.Add(newTreeNode.Item2);
            GlobalInfo.FavoritesSetting.FavoritesInfos.Add(newTreeNode.Item1);
        }
    }
}

删除当前节点

private void Delete_OnClick(object sender, RoutedEventArgs e)
{
    if (_currentRightItem?.Parent == null) return;

    foreach (var item in _currentRightItem.Items)
    {
        _currentRightItem.Items.Remove(item);
        if (!GlobalInfo.FavoritesSetting.FavoritesInfos.Exists(x => x.NodeId == _currentRightItem.NodeId))
            continue;
        var currentNode = (GlobalInfo.FavoritesSetting.FavoritesInfos.FirstOrDefault(x => x.NodeId == _currentRightItem.NodeId));
        GlobalInfo.FavoritesSetting.FavoritesInfos.Remove(currentNode);
    }

    if (_currentRightItem.Parent is MTreeViewItem items)
    {
        if (GlobalInfo.FavoritesSetting.FavoritesInfos.Exists(x => x.NodeId == _currentRightItem.NodeId))
        {
            var currentNode = (GlobalInfo.FavoritesSetting.FavoritesInfos.FirstOrDefault(x => x.NodeId == _currentRightItem.NodeId));
            GlobalInfo.FavoritesSetting.FavoritesInfos.Remove(currentNode);
        }
        items.Items.Remove(_currentRightItem);
    }
}

关于创建TreeNode代码细节请参考文章末尾源码

增加OpenNewTabEvent事件用于点击收藏内容时打开网页

四、运行效果

五、源码地址

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

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本文链接：https://www.cnblogs.com/mchao/p/14237923.html