ant-design-blazor/components/tabs/Tabs.razor.cs

590 lines
20 KiB
C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AntDesign.JsInterop;
using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;
namespace AntDesign
{
public partial class Tabs : AntDomComponentBase
{
private const string PrefixCls = "ant-tabs";
private bool IsHorizontal { get => TabPosition == AntDesign.TabPosition.Top || TabPosition == AntDesign.TabPosition.Bottom; }
//private ClassMapper _barClassMapper = new ClassMapper();
//private ClassMapper _prevClassMapper = new ClassMapper();
//private ClassMapper _nextClassMapper = new ClassMapper();
//private ClassMapper _navClassMapper = new ClassMapper();
private TabPane _activePane;
private TabPane _renderedActivePane;
private ElementReference _activeTabBar;
private ElementReference _scrollTabBar;
private ElementReference _tabBars;
private string _inkStyle;
private string _navStyle;
//private string _contentStyle;
//private bool? _prevIconEnabled;
//private bool? _nextIconEnabled;
private string _operationClass;
private string _tabsNavWarpPingClass;
private string _operationStyle;
private int _navIndex;
private int _scrollOffset;
private int _navTotal;
private int _navSection;
private bool _needRefresh;
internal List<TabPane> _panes = new List<TabPane>();
#region Parameters
[Parameter]
public RenderFragment ChildContent { get; set; }
private string _activeKey;
/// <summary>
/// Current <see cref="TabPane"/>'s <see cref="TabPane.Key"/>
/// </summary>
[Parameter]
public string ActiveKey
{
get
{
return _activeKey;
}
set
{
if (_activeKey != value)
{
if (_panes.Count == 0)
return;
TabPane tabPane = _panes.Find(p => p.Key == value);
if (tabPane == null)
return;
ActivatePane(tabPane);
}
}
}
[Parameter]
public EventCallback<string> ActiveKeyChanged { get; set; }
/// <summary>
/// Whether to change tabs with animation. Only works while <see cref="TabPosition"/> = <see cref="TabPosition.Top"/> or <see cref="TabPosition.Bottom"/>
/// </summary>
[Parameter]
public bool Animated { get; set; } = true;
/// <summary>
/// Replace the TabBar
/// </summary>
[Parameter]
public object RenderTabBar { get; set; }
/// <summary>
/// Initial active <see cref="TabPane"/>'s <see cref="TabPane.Key"/>, if <see cref="ActiveKey"/> is not set
/// </summary>
[Parameter]
public string DefaultActiveKey { get; set; }
/// <summary>
/// Hide plus icon or not. Only works while <see cref="Type"/> = <see cref="TabType.EditableCard"/>
/// </summary>
[Parameter]
public bool HideAdd { get; set; } = false;
/// <summary>
/// Preset tab bar size
/// </summary>
[Parameter]
public string Size { get; set; } = TabSize.Default;
/// <summary>
/// Extra content in tab bar
/// </summary>
[Parameter]
public RenderFragment TabBarExtraContent { get; set; }
/// <summary>
/// The gap between tabs
/// </summary>
[Parameter]
public int TabBarGutter { get; set; }
/// <summary>
/// Tab bar style object
/// </summary>
[Parameter]
public string TabBarStyle { get; set; }
/// <summary>
/// Position of tabs
/// </summary>
[Parameter]
public string TabPosition { get; set; } = AntDesign.TabPosition.Top;
/// <summary>
/// Basic style of tabs
/// </summary>
[Parameter]
public string Type { get; set; } = TabType.Line;
/// <summary>
/// Callback executed when active tab is changed
/// </summary>
[Parameter]
public EventCallback<string> OnChange { get; set; }
/// <summary>
/// Callback executed when tab is added or removed. Only works while <see cref="Type"/> = <see cref="TabType.EditableCard"/>
/// </summary>
[Parameter]
public Func<string, Task<bool>> OnEdit { get; set; } = key => Task.FromResult(true);
/// <summary>
/// Callback executed when next button is clicked
/// </summary>
[Parameter]
public EventCallback OnNextClick { get; set; }
/// <summary>
/// Callback executed when prev button is clicked
/// </summary>
[Parameter]
public EventCallback OnPrevClick { get; set; }
/// <summary>
/// Callback executed when tab is clicked
/// </summary>
[Parameter]
public EventCallback<string> OnTabClick { get; set; }
/// <summary>
/// Whether to turn on keyboard navigation
/// </summary>
[Parameter]
public bool Keyboard { get; set; } = true;
[Parameter]
public Func<TabPane> CreateTabPane { get; set; }
[Parameter]
public bool Draggable { get; set; }
#endregion Parameters
public override Task SetParametersAsync(ParameterView parameters)
{
_needRefresh = true;
_renderedActivePane = null;
string type = parameters.GetValueOrDefault<string>(nameof(Type));
if (type == TabType.Card)
{
// according to ant design documents,
// Animated default to false when type="card"
Animated = false;
}
string position = parameters.GetValueOrDefault<string>(nameof(TabPosition));
if (!string.IsNullOrEmpty(position))
{
_navIndex = 0;
}
return base.SetParametersAsync(parameters);
}
protected override void OnParametersSet()
{
base.OnParametersSet();
//if (Type == TabType.EditableCard && !HideAdd)
//{
// TabBarExtraContent = (b) =>
// {
// b.OpenComponent<Icon>(0);
// b.AddAttribute(1, "Type", "plus");
// b.AddAttribute(2, "class", $"{PrefixCls}-new-tab");
// b.AddAttribute(3, "onclick", EventCallback.Factory.Create(this, AddTabPane));
// b.CloseComponent();
// };
//}
ClassMapper.Clear()
.Add(PrefixCls)
.Add($"{PrefixCls}-{TabPosition}")
.Add($"{PrefixCls}-{Type}")
.If($"{PrefixCls}-large", () => Size == TabSize.Large)
.If($"{PrefixCls}-small", () => Size == TabSize.Small)
.If($"{PrefixCls}-{TabType.Card}", () => Type == TabType.EditableCard)
.If($"{PrefixCls}-no-animation", () => !Animated);
//_barClassMapper.Clear()
// .Add($"{PrefixCls}-bar")
// .Add($"{PrefixCls}-{TabPosition}-bar")
// .Add($"{PrefixCls}-{Type}-bar")
// .If($"{PrefixCls}-{TabType.Card}-bar", () => Type == TabType.EditableCard)
// .If($"{PrefixCls}-large-bar", () => Size == TabSize.Large)
// .If($"{PrefixCls}-small-bar", () => Size == TabSize.Small);
//_prevClassMapper.Clear()
// .Add($"{PrefixCls}-tab-prev")
// .If($"{PrefixCls}-tab-btn-disabled", () => !_prevIconEnabled.HasValue || !_prevIconEnabled.Value)
// .If($"{PrefixCls}-tab-arrow-show", () => _prevIconEnabled.HasValue);
//_nextClassMapper.Clear()
// .Add($"{PrefixCls}-tab-next")
// .If($"{PrefixCls}-tab-btn-disabled", () => !_nextIconEnabled.HasValue || !_nextIconEnabled.Value)
// .If($"{PrefixCls}-tab-arrow-show", () => _nextIconEnabled.HasValue);
//_navClassMapper.Clear()
// .Add($"{PrefixCls}-nav-container")
// .If($"{PrefixCls}-nav-container-scrolling", () => _prevIconEnabled.HasValue || _nextIconEnabled.HasValue);
//_navStyle = "transform: translate3d(0px, 0px, 0px);";
_inkStyle = "left: 0px; width: 0px;";
//_contentStyle = "margin-" + (IsHorizontal ? "left" : "top") + ": 0;";
}
/// <summary>
/// Add <see cref="AntTabPane"/> to <see cref="AntTabs"/>
/// </summary>
/// <param name="tabPane">The AntTabPane to be added</param>
/// <exception cref="ArgumentNullException">Key is null</exception>
/// <exception cref="ArgumentException">An AntTabPane with the same key already exists</exception>
internal void AddTabPane(TabPane tabPane)
{
if (string.IsNullOrEmpty(tabPane.Key))
{
throw new ArgumentNullException(nameof(tabPane), "Key is null");
}
if (_panes.Select(p => p.Key).Contains(tabPane.Key))
{
throw new ArgumentException("An AntTabPane with the same key already exists");
}
_panes.Add(tabPane);
if (!string.IsNullOrEmpty(DefaultActiveKey))
{
if (tabPane.Key == DefaultActiveKey)
{
ActivatePane(tabPane);
}
}
else
{
if (_panes.Count == 1)
{
ActivatePane(tabPane);
}
}
}
private async Task AddTabPane(MouseEventArgs args)
{
if (CreateTabPane != null)
{
TabPane pane = CreateTabPane();
if (await OnEdit.Invoke(pane.Key))
{
Dictionary<string, object> properties = new Dictionary<string, object>
{
//[nameof(TabPane.Parent)] = this,
[nameof(TabPane.ForceRender)] = pane.ForceRender,
[nameof(TabPane.Key)] = pane.Key,
[nameof(TabPane.Tab)] = pane.Tab,
[nameof(TabPane.ChildContent)] = pane.ChildContent,
[nameof(TabPane.Disabled)] = pane.Disabled
};
await pane.SetParametersAsync(ParameterView.FromDictionary(properties));
pane.Parent = this;
ActivatePane(pane);
}
}
}
public async Task RemoveTabPane(TabPane pane)
{
if (await OnEdit.Invoke(pane.Key))
{
_needRefresh = true;
_panes.Remove(pane);
if (pane != null && pane.IsActive && _panes.Count > 0)
{
ActivatePane(_panes[0]);
}
}
}
private void HandleTabClick(TabPane tabPane, MouseEventArgs args)
{
if (OnTabClick.HasDelegate)
{
OnTabClick.InvokeAsync(tabPane.Key);
}
ActivatePane(tabPane);
}
private void ActivatePane(TabPane tabPane)
{
if (!tabPane.Disabled && _panes.Contains(tabPane))
{
if (_activePane != null)
{
_activePane.IsActive = false;
}
tabPane.IsActive = true;
_activePane = tabPane;
if (_activeKey != _activePane.Key)
{
if (!string.IsNullOrEmpty(_activeKey))
{
if (ActiveKeyChanged.HasDelegate)
{
ActiveKeyChanged.InvokeAsync(_activePane.Key);
}
if (OnChange.HasDelegate)
{
OnChange.InvokeAsync(_activePane.Key);
}
}
_activeKey = _activePane.Key;
}
StateHasChanged();
}
}
protected override async Task OnAfterRenderAsync(bool firstRender)
{
await base.OnAfterRenderAsync(firstRender);
if (_activePane == null)
{
throw new ArgumentNullException($"One of {nameof(ActiveKey)} and {nameof(DefaultActiveKey)} should be set");
}
await TryRenderInk();
await TryRenderNavOperation();
_needRefresh = false;
}
private async Task TryRenderNavOperation()
{
int navWidth = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _tabBars)).clientWidth;
int navTotalWidth = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _scrollTabBar)).clientWidth;
if (navTotalWidth < navWidth)
{
_operationClass = "ant-tabs-nav-operations ant-tabs-nav-operations-hidden";
_operationStyle = "visibility: hidden; order: 1;";
_tabsNavWarpPingClass = string.Empty;
}
else
{
_operationClass = "ant-tabs-nav-operations";
_tabsNavWarpPingClass = "ant-tabs-nav-wrap-ping-right";
_operationStyle = string.Empty;
}
StateHasChanged();
}
private async Task TryRenderInk()
{
if (_renderedActivePane != _activePane)
{
// TODO: slide to activated tab
// animate Active Ink
// ink bar
Element element = await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _activeTabBar);
Element navSection = await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _tabBars);
Element navScroll = await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _scrollTabBar);
if (IsHorizontal)
{
//_inkStyle = "left: 0px; width: 0px;";
_inkStyle = $"left: {element.offsetLeft}px; width: {element.clientWidth}px";
if (element.offsetLeft > _scrollOffset + navSection.clientWidth
|| element.offsetLeft < _scrollOffset)
{
// need to scroll tab bars
_scrollOffset = element.offsetLeft;
_navStyle = $"transform: translate(-{_scrollOffset}px, 0px);";
}
}
else
{
_inkStyle = $"top: {element.offsetTop}px; height: {element.clientHeight}px;";
if (element.offsetTop > _scrollOffset + navSection.clientHeight
|| element.offsetTop < _scrollOffset)
{
// need to scroll tab bars
_scrollOffset = element.offsetTop;
_navStyle = $"transform: translate(0px, -{_scrollOffset}px);";
}
}
StateHasChanged();
_renderedActivePane = _activePane;
}
}
//private async void OnPrevClicked()
//{
// _needRefresh = true;
// if (OnPrevClick.HasDelegate)
// {
// await OnPrevClick.InvokeAsync(null);
// }
// // get the old offset to the left, and _navIndex != 0 because prev will be disabled
// int left = _navIndex * _navSection;
// if (IsHorizontal)
// {
// _navSection = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _scrollTabBar)).clientWidth;
// _navTotal = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _tabBars)).clientWidth;
// }
// else
// {
// _navSection = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _scrollTabBar)).clientHeight;
// _navTotal = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _tabBars)).clientHeight;
// }
// // calculate the current _navIndex after users resize the browser, and _navIndex > 0 guaranteed since left > 0
// _navIndex = (int)Math.Ceiling(1.0 * left / _navSection);
// int offset = --_navIndex * _navSection;
// if (IsHorizontal)
// {
// _navStyle = $"transform: translate3d(-{offset}px, 0px, 0px);";
// }
// else
// {
// _navStyle = $"transform: translate3d(0px, -{offset}px, 0px);";
// }
// RefreshNavIcon();
// _needRefresh = false;
//}
//private async void OnNextClicked()
//{
// // BUG: when vertical
// _needRefresh = true;
// if (OnNextClick.HasDelegate)
// {
// await OnNextClick.InvokeAsync(null);
// }
// // get the old offset to the left
// int left = _navIndex * _navSection;
// if (IsHorizontal)
// {
// _navSection = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _scrollTabBar)).clientWidth;
// _navTotal = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _tabBars)).clientWidth;
// }
// else
// {
// _navSection = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _scrollTabBar)).clientHeight;
// _navTotal = (await JsInvokeAsync<Element>(JSInteropConstants.getDomInfo, _tabBars)).clientHeight;
// }
// // calculate the current _navIndex after users resize the browser
// _navIndex = left / _navSection;
// int offset = Math.Min(++_navIndex * _navSection, _navTotal / _navSection * _navSection);
// if (IsHorizontal)
// {
// _navStyle = $"transform: translate3d(-{offset}px, 0px, 0px);";
// }
// else
// {
// _navStyle = $"transform: translate3d(0px, -{offset}px, 0px);";
// }
// RefreshNavIcon();
// _needRefresh = false;
//}
//private void RefreshNavIcon()
//{
// if (_navTotal > _navSection)
// {
// if (_navIndex == 0)
// {
// // reach the first section
// _prevIconEnabled = false;
// }
// else
// {
// _prevIconEnabled = true;
// }
// if ((_navIndex + 1) * _navSection > _navTotal)
// {
// // reach the last section
// _nextIconEnabled = false;
// }
// else
// {
// _nextIconEnabled = true;
// }
// }
// else
// {
// // hide icon
// _prevIconEnabled = null;
// _nextIconEnabled = null;
// }
// StateHasChanged();
//}
protected override bool ShouldRender()
{
return _needRefresh || _renderedActivePane != _activePane;
}
#region DRAG & DROP
private TabPane _draggingPane;
private void HandleDragStart(DragEventArgs args, TabPane pane)
{
if (Draggable)
{
args.DataTransfer.DropEffect = "move";
args.DataTransfer.EffectAllowed = "move";
_draggingPane = pane;
}
}
private void HandleDrop(TabPane pane)
{
if (Draggable && _draggingPane != null)
{
int newIndex = _panes.IndexOf(pane);
_panes.Remove(_draggingPane);
_panes.Insert(newIndex, _draggingPane);
_draggingPane = null;
_needRefresh = true;
_renderedActivePane = null;
StateHasChanged();
}
}
#endregion DRAG & DROP
}
}