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https://gitee.com/ant-design-blazor/ant-design-blazor.git
synced 2024-12-15 01:11:52 +08:00
565 lines
19 KiB
C#
565 lines
19 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Threading.Tasks;
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using AntDesign.Core.Extensions;
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using Microsoft.AspNetCore.Components;
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using Microsoft.AspNetCore.Components.Web;
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using Microsoft.JSInterop;
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namespace AntDesign
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{
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public partial class RangePicker<TValue> : DatePickerBase<TValue>
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{
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private TValue _value;
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/// <summary>
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/// Gets or sets the value of the input. This should be used with two-way binding.
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/// </summary>
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/// <example>
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/// @bind-Value="model.PropertyName"
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/// </example>
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[Parameter]
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public sealed override TValue Value
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{
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get { return _value; }
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set
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{
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TValue orderedValue = SortValue(value);
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var hasChanged = !EqualityComparer<TValue>.Default.Equals(orderedValue, Value);
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if (hasChanged)
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{
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_value = orderedValue;
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OnValueChange(orderedValue);
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}
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}
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}
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private DateTime[] _pickerValuesAfterInit = new DateTime[2];
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[Parameter]
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public EventCallback<DateRangeChangedEventArgs> OnChange { get; set; }
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public RangePicker()
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{
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IsRange = true;
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DisabledDate = (date) =>
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{
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var array = Value as Array;
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if (_pickerStatus[0]._hadSelectValue && _inputEnd.IsOnFocused)
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{
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DateTime? value = null;
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GetIfNotNull(Value, 0, notNullValue =>
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{
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value = notNullValue;
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});
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if (value != null)
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{
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return DateHelper.FormatDateByPicker(date.Date, Picker) < DateHelper.FormatDateByPicker(((DateTime)value).Date, Picker);
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}
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}
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if (_pickerStatus[1]._hadSelectValue && _inputStart.IsOnFocused)
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{
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DateTime? value = null;
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GetIfNotNull(Value, 1, notNullValue =>
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{
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value = notNullValue;
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});
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if (value != null)
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{
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return DateHelper.FormatDateByPicker(date.Date, Picker) > DateHelper.FormatDateByPicker(((DateTime)value).Date, Picker);
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}
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}
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return false;
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};
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}
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private async Task OnInputClick(int index)
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{
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_duringFocus = false;
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if (_duringManualInput)
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{
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return;
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}
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_openingOverlay = !_dropDown.IsOverlayShow();
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//Reset Picker to default in case the picker value was changed
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//but no value was selected (for example when a user clicks next
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//month but does not select any value)
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if (UseDefaultPickerValue[index] && DefaultPickerValue != null)
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{
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PickerValues[index] = _pickerValuesAfterInit[index];
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}
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await _dropDown.Show();
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// clear status
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_pickerStatus[0]._currentShowHadSelectValue = false;
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_pickerStatus[1]._currentShowHadSelectValue = false;
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if (index == 0)
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{
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// change start picker value
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if (!_inputStart.IsOnFocused && _pickerStatus[index]._hadSelectValue && !UseDefaultPickerValue[index])
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{
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GetIfNotNull(Value, index, notNullValue =>
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{
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ChangePickerValue(notNullValue, index);
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});
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}
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ChangeFocusTarget(true, false);
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}
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else
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{
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// change end picker value
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if (!_inputEnd.IsOnFocused && _pickerStatus[index]._hadSelectValue && !UseDefaultPickerValue[index])
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{
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GetIfNotNull(Value, index, notNullValue =>
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{
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ChangePickerValue(notNullValue, index);
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});
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}
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ChangeFocusTarget(false, true);
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}
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}
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private DateTime? _cacheDuringInput;
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private DateTime _pickerValueCache;
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protected void OnInput(ChangeEventArgs args, int index = 0)
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{
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if (args == null)
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{
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return;
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}
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var array = Value as Array;
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if (!_duringManualInput)
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{
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_duringManualInput = true;
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_cacheDuringInput = array.GetValue(index) as DateTime?;
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_pickerValueCache = PickerValues[index];
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}
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if (FormatAnalyzer.TryPickerStringConvert(args.Value.ToString(), out DateTime changeValue, false))
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{
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array.SetValue(changeValue, index);
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ChangePickerValue(changeValue, index);
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if (_isNotifyFieldChanged && (Form?.ValidateOnChange == true))
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{
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EditContext?.NotifyFieldChanged(FieldIdentifier);
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}
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StateHasChanged();
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}
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}
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/// <summary>
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/// Method is called via EventCallBack if the keyboard key is no longer pressed inside the Input element.
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/// </summary>
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/// <param name="e">Contains the key (combination) which was pressed inside the Input element</param>
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/// <param name="index">Refers to picker index - 0 for starting date, 1 for ending date</param>
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protected async Task OnKeyDown(KeyboardEventArgs e, int index)
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{
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if (e == null) throw new ArgumentNullException(nameof(e));
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var key = e.Key.ToUpperInvariant();
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if (key == "ENTER" || key == "TAB" || key == "ESCAPE")
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{
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_duringManualInput = false;
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var input = (index == 0 ? _inputStart : _inputEnd);
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if (string.IsNullOrWhiteSpace(input.Value))
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ClearValue(index, false);
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else if (!await TryApplyInputValue(index, input.Value))
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return;
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if (key == "ESCAPE" && _dropDown.IsOverlayShow())
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{
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Close();
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await Js.FocusAsync(input.Ref);
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return;
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}
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if (index == 1)
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{
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if (key != "TAB")
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{
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//needed only in wasm, details: https://github.com/dotnet/aspnetcore/issues/30070
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await Task.Yield();
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await Js.InvokeVoidAsync(JSInteropConstants.InvokeTabKey);
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Close();
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}
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else if (!e.ShiftKey)
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{
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Close();
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AutoFocus = false;
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}
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}
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if (index == 0)
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{
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if (key == "TAB" && e.ShiftKey)
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{
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Close();
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AutoFocus = false;
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}
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else if (key != "TAB")
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{
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await Blur(0);
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await Focus(1);
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}
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}
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return;
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}
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if (key == "ARROWDOWN" && !_dropDown.IsOverlayShow())
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{
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await _dropDown.Show();
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return;
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}
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if (key == "ARROWUP" && _dropDown.IsOverlayShow())
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{
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Close();
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await Task.Yield();
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AutoFocus = true;
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return;
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}
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}
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private async Task<bool> TryApplyInputValue(int index, string inputValue)
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{
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if (FormatAnalyzer.TryPickerStringConvert(inputValue, out DateTime changeValue, false))
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{
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var array = Value as Array;
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array.SetValue(changeValue, index);
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var validationSuccess = await ValidateRange(index, changeValue, array);
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if (OnChange.HasDelegate)
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{
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await OnChange.InvokeAsync(new DateRangeChangedEventArgs
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{
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Dates = new DateTime?[] { array.GetValue(0) as DateTime?, array.GetValue(1) as DateTime? },
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DateStrings = new string[] { GetInputValue(0), GetInputValue(1) }
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});
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}
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return validationSuccess;
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}
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return false;
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}
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private async Task<bool> ValidateRange(int index, DateTime newDate, Array array)
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{
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if (index == 0 && array.GetValue(1) is not null && ((DateTime)array.GetValue(1)).CompareTo(newDate) < 0)
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{
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ClearValue(1, false);
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await Blur(0);
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await Focus(1);
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return false;
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}
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else if (index == 1)
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{
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if (array.GetValue(0) is not null && newDate.CompareTo((DateTime)array.GetValue(0)) < 0)
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{
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ClearValue(0, false);
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await Blur(1);
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await Focus(0);
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return false;
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}
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else if (array.GetValue(0) is null)
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{
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await Blur(1);
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await Focus(0);
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return false;
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}
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}
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return true;
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}
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private async Task OnFocus(int index)
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{
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_duringFocus = true;
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if (index == 0)
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{
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if (!_inputStart.IsOnFocused)
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{
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await Blur(1);
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await Focus(0);
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}
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}
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else
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{
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if (!_inputEnd.IsOnFocused)
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{
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await Blur(0);
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await Focus(1);
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}
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}
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AutoFocus = true;
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}
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protected override async Task OnBlur(int index)
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{
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//Await for Focus event - if it is going to happen, it will be
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//right after OnBlur. Best way to achieve that is to wait.
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//Task.Yield() does not work here.
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await Task.Delay(1);
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if (_duringFocus)
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{
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_duringFocus = false;
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_shouldRender = false;
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return;
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}
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if (_openingOverlay)
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{
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return;
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}
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if (_duringManualInput)
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{
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var array = Value as Array;
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if (!array.GetValue(index).Equals(_cacheDuringInput))
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{
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//reset picker to Value
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if (IsNullable)
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array.SetValue(_cacheDuringInput, index);
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else
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array.SetValue(_cacheDuringInput.GetValueOrDefault(), index);
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_pickerStatus[index]._hadSelectValue = !(Value is null && (DefaultValue is not null || DefaultPickerValue is not null));
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ChangePickerValue(_pickerValueCache, index);
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}
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_duringManualInput = false;
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}
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AutoFocus = false;
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return;
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}
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protected override void OnInitialized()
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{
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base.OnInitialized();
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RangePickerDefaults.ProcessDefaults(Value, DefaultValue, DefaultPickerValue, PickerValues, UseDefaultPickerValue);
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_pickerValuesAfterInit[0] = PickerValues[0];
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_pickerValuesAfterInit[1] = PickerValues[1];
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if (_value == null)
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{
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_value = CreateInstance();
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ValueChanged.InvokeAsync(_value);
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}
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}
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/// <summary>
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/// Handle change of values.
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/// When values are changed, PickerValues should point to those new values
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/// or current date if no values were passed.
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/// </summary>
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/// <param name="value"></param>
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protected override void OnValueChange(TValue value)
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{
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base.OnValueChange(value);
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//reset all only if not changed using picker
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if (_inputStart?.IsOnFocused != true && _inputEnd?.IsOnFocused != true) // is null or false
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{
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UseDefaultPickerValue[0] = false;
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UseDefaultPickerValue[1] = false;
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_pickerStatus[0]._hadSelectValue = true;
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_pickerStatus[1]._hadSelectValue = true;
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}
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}
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/// <summary>
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/// Get value by picker index
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/// </summary>
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/// <param name="index"></param>
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/// <returns></returns>
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public override DateTime? GetIndexValue(int index)
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{
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if (Value != null)
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{
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var array = Value as Array;
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var indexValue = array.GetValue(index);
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if (indexValue == null)
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{
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return null;
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}
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return Convert.ToDateTime(indexValue, CultureInfo);
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}
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else if (!IsTypedValueNull(DefaultValue, index, out var defaultValue))
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{
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return defaultValue;
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}
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return null;
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}
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private static bool IsTypedValueNull(TValue value, int index, out DateTime? outValue)
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{
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outValue = (DateTime?)(value as Array)?.GetValue(index);
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return outValue == null;
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}
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public override void ChangeValue(DateTime value, int index = 0)
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{
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bool isValueInstantiated = Value == null;
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if (isValueInstantiated)
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{
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Value = CreateInstance();
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}
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UseDefaultPickerValue[index] = false;
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var array = Value as Array;
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array.SetValue(value, index);
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//if Value was just now instantiated then set the other index to existing DefaultValue
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if (isValueInstantiated && IsRange && DefaultValue != null)
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{
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var arrayDefault = DefaultValue as Array;
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int oppositeIndex = index == 1 ? 0 : 1;
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array.SetValue(arrayDefault.GetValue(oppositeIndex), oppositeIndex);
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}
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_pickerStatus[index]._hadSelectValue = true;
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_pickerStatus[index]._currentShowHadSelectValue = true;
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if (!IsShowTime && Picker != DatePickerType.Time)
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{
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if (_pickerStatus[0]._currentShowHadSelectValue && _pickerStatus[1]._currentShowHadSelectValue)
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{
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Close();
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}
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// if the other DatePickerInput is disabled, then close picker panel
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else if (IsDisabled(Math.Abs(index - 1)))
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{
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Close();
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}
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}
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if (OnChange.HasDelegate)
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{
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OnChange.InvokeAsync(new DateRangeChangedEventArgs
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{
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Dates = new DateTime?[] { array.GetValue(0) as DateTime?, array.GetValue(1) as DateTime? },
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DateStrings = new string[] { GetInputValue(0), GetInputValue(1) }
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});
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}
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if (_isNotifyFieldChanged && (Form?.ValidateOnChange == true))
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{
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EditContext?.NotifyFieldChanged(FieldIdentifier);
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}
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}
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public override void ClearValue(int index = -1, bool closeDropdown = true)
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{
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_isSetPicker = false;
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var array = CurrentValue as Array;
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int[] indexToClear = index == -1 ? new[] { 0, 1 } : new[] { index };
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string[] pickerHolders = new string[2];
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(pickerHolders[0], pickerHolders[1]) = DatePickerPlaceholder.GetRangePlaceHolderByType(_pickerStatus[0]._initPicker, Locale);
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foreach (var i in indexToClear)
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{
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if (!IsNullable && DefaultValue != null)
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{
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var defaults = DefaultValue as Array;
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array.SetValue(defaults.GetValue(i), i);
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}
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else
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{
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array.SetValue(default, i);
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}
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_placeholders[i] = pickerHolders[i];
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_pickerStatus[i]._hadSelectValue = false;
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}
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if (closeDropdown)
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Close();
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if (OnClearClick.HasDelegate)
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OnClearClick.InvokeAsync(null);
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}
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private void GetIfNotNull(TValue value, int index, Action<DateTime> notNullAction)
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{
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var array = value as Array;
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var indexValue = array.GetValue(index);
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if (!IsNullable)
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{
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DateTime dateTime = Convert.ToDateTime(indexValue, CultureInfo);
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if (dateTime != DateTime.MinValue)
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{
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notNullAction?.Invoke(dateTime);
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}
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}
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if (IsNullable && indexValue != null)
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{
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notNullAction?.Invoke(Convert.ToDateTime(indexValue, CultureInfo));
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}
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}
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private TValue CreateInstance()
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{
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if (DefaultValue is not null)
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return (TValue)(DefaultValue as Array).Clone();
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if (IsNullable)
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{
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return (TValue)Array.CreateInstance(typeof(DateTime?), 2).Clone();
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}
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else
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{
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return (TValue)Array.CreateInstance(typeof(DateTime), 2).Clone();
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}
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}
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protected override bool TryParseValueFromString(string value, out TValue result, out string validationErrorMessage)
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{
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result = default;
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validationErrorMessage = $"{FieldIdentifier.FieldName} field isn't valid.";
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if (string.IsNullOrEmpty(value))
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{
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return false;
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}
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string[] values = value.Split(",");
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if (values.Length != 2)
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{
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return false;
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}
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var success0 = BindConverter.TryConvertTo<DateTime>(values[0], CultureInfo, out var dateTime0);
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var success1 = BindConverter.TryConvertTo<DateTime>(values[1], CultureInfo, out var dateTime1);
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if (success0 && success1)
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{
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result = CreateInstance();
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var array = result as Array;
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array.SetValue(dateTime0, 0);
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array.SetValue(dateTime1, 1);
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validationErrorMessage = null;
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return true;
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}
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return false;
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}
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private void OverlayVisibleChange(bool visible)
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{
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OnOpenChange.InvokeAsync(visible);
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_openingOverlay = false;
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}
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}
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}
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