ant-design-blazor/components/tree/TreeNodeSwitcher.razor

@namespace AntDesign
@inherits ComponentBase
@typeparam TItem

<span class="@ClassMapper.Class" @onclick="OnClick">
    @if (SelfNode.Loading)
    {
        <Icon Type="loading" Theme="outline" Class="ant-tree-switcher-loading-icon" />
    }
    else
    {
        <!-- node has its own switcher icon -->
        @if (SelfNode?.SwitcherIconTemplate != null || SelfNode?.SwitcherIcon != null)
        {
            if (SelfNode.SwitcherIconTemplate != null)
            {
                <span class="ant-tree-switcher-icon">
                    @SelfNode.SwitcherIconTemplate(SelfNode)
                </span>
            }
            else if (SelfNode.SwitcherIcon != null)
            {
                <Icon Type="@SelfNode.SwitcherIcon" Class="ant-tree-switcher-icon" />
            }
        }
        else
        {
            @if (TreeComponent.ShowLine)
            {
                <!-- When the node is not leaf, then show switcher icon -->
                if (!SelfNode.IsLeaf)
                {
                    @if (TreeComponent.SwitcherIconTemplate != null)
                    {
                        <span class="ant-tree-switcher-icon">
                            @TreeComponent.SwitcherIconTemplate(SelfNode)
                        </span>
                    }
                    else if (TreeComponent.SwitcherIcon != null)
                    {
                        <Icon Type="TreeComponent.SwitcherIcon" Class="ant-tree-switcher-icon" />
                    }
                    else
                    {
                        <Icon Type="@(IsSwitcherOpen ? "minus-square" : "plus-square")" Class="ant-tree-switcher-line-icon" />
                    }
                }
                else
                {
                    <!-- Show the leaf icon (file) or leaf line (└) -->
                    if (TreeComponent.ShowLeafIcon)
                    {
                        <Icon Type="file" Theme="outline" Class="ant-tree-switcher-line-icon" />
                    }
                    else
                    {
                        <span class="ant-tree-switcher-leaf-line"></span>
                    }
                }
            }
            else if (!SelfNode.IsLeaf)
            {
                <!-- node is not leaf and not show line, then show the default arrow icon -->
                <Icon Type="caret-down" Theme="outline" Class="ant-tree-switcher-icon" />
            }
        }
    }
</span>