/// <summary>
/// Creates a new <see cref="ModelExplorer"/>.
/// </summary>
/// <param name="metadataProvider">The <see cref="IModelMetadataProvider"/>.</param>
/// <param name="container">The container <see cref="ModelExplorer"/>.</param>
/// <param name="metadata">The <see cref="ModelMetadata"/>.</param>
/// <param name="modelAccessor">A model accessor function..</param>
public ModelExplorer(
IModelMetadataProvider metadataProvider,
ModelExplorer container,
ModelMetadata metadata,
Func<object, object> modelAccessor)
{
if (metadataProvider == null)
{
throw new ArgumentNullException(nameof(metadataProvider));
}
if (container == null)
{
throw new ArgumentNullException(nameof(container));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
_metadataProvider = metadataProvider;
Container = container;
Metadata = metadata;
_modelAccessor = modelAccessor;
}
/// <summary>
/// Invokes the view component.
/// </summary>
/// <param name="tableElementId">The ID of the table DOM element.</param>
/// <param name="modelExplorer">The model explorer for the collection containing the table contents.</param>
/// <param name="properties">The name of the properties of the model object to show in the table.</param>
/// <param name="hiddenValues">Hidden values that should be included with the properties.</param>
/// <param name="orderByProp">The property to order the rows by.</param>
/// <param name="textAreas">Whether to render the properties in multi-line text areas.</param>
/// <param name="startMinRows">The minimum number of rows in the table to start with.</param>
/// <param name="defaultValues">The default values for each column, if any.</param>
/// <param name="dropDownLists">The drop down lists to use, if any.</param>
/// <param name="subPanelConfig">The configuration object for the subpanel (if any).</param>
public IViewComponentResult Invoke(
string tableElementId,
ModelExplorer modelExplorer,
string[] properties,
IDictionary<string, string> hiddenValues,
string orderByProp,
int startMinRows,
bool textAreas,
IDictionary<string, object> defaultValues,
IList<DropDownList> dropDownLists,
SubPanelConfig subPanelConfig)
{
var props = properties.Where(prop => prop != null).ToArray();
var collection = GetOrderedCollection(modelExplorer, orderByProp);
var elementMetadata = modelExplorer.Metadata.ElementMetadata;
string collectionName = modelExplorer.Metadata.PropertyName;
JArray columns = GetColumnInfo
(
props,
hiddenValues,
textAreas,
defaultValues,
dropDownLists,
elementMetadata
);
var initDataProperties = subPanelConfig == null
? props
: props.Union(new[] { subPanelConfig.ContentsPropertyName });
JArray initData = GetInitialData
(
hiddenValues,
collection,
dropDownLists,
elementMetadata,
initDataProperties
);
return View
(
new DynamicTableConfig
(
tableElementId,
collectionName,
columns,
initData,
startMinRows,
textAreas,
dropDownLists,
subPanelConfig
)
);
}
/// <summary>
/// Initializes a new instance of the <see cref="ModelExpression"/> class.
/// </summary>
/// <param name="name">
/// String representation of the <see cref="System.Linq.Expressions.Expression"/> of interest.
/// </param>
/// <param name="modelExplorer">
/// Includes the model and metadata about the <see cref="System.Linq.Expressions.Expression"/> of interest.
/// </param>
public ModelExpression(string name, ModelExplorer modelExplorer)
{
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
if (modelExplorer == null)
{
throw new ArgumentNullException(nameof(modelExplorer));
}
Name = name;
ModelExplorer = modelExplorer;
}
public JsTreeTagHelperTests()
{
JsTree tree = new JsTree();
tree.SelectedIds.Add(4567);
tree.SelectedIds.Add(12345);
tree.Nodes.Add(new JsTreeNode("Test"));
tree.Nodes[0].Nodes.Add(new JsTreeNode(12345, "Test1"));
tree.Nodes[0].Nodes.Add(new JsTreeNode(23456, "Test2"));
EmptyModelMetadataProvider provider = new EmptyModelMetadataProvider();
ModelExplorer explorer = new ModelExplorer(provider, provider.GetMetadataForProperty(typeof(JsTreeView), "JsTree"), tree);
helper = new JsTreeTagHelper();
helper.For = new ModelExpression("JsTree", explorer);
output = new TagHelperOutput("div", new TagHelperAttributeList(), (useCachedResult, encoder) => null);
}
/// <summary>
/// Returns a collection, ordered by the property with the given name.
/// </summary>
private IEnumerable<object> GetOrderedCollection(ModelExplorer modelExplorer, string orderByProp)
{
var orderProp = modelExplorer.Metadata.ElementMetadata.Properties[orderByProp];
var collection = (modelExplorer.Model as IEnumerable)?.Cast<object>();
if (collection == null)
return null;
if (orderProp.ModelType == typeof(string))
return collection.OrderBy(obj => (string) orderProp.PropertyGetter(obj));
else if (orderProp.ModelType == typeof(int))
return collection.OrderBy(obj => (int) orderProp.PropertyGetter(obj));
else
throw new InvalidOperationException("Unsupported order property type.");
}
private string GetInputType(ModelExplorer modelExplorer, out string inputTypeHint)
{
foreach (var hint in GetInputTypeHints(modelExplorer))
{
string inputType;
if (_defaultInputTypes.TryGetValue(hint, out inputType))
{
inputTypeHint = hint;
return inputType;
}
}
inputTypeHint = InputType.Text.ToString().ToLowerInvariant();
return inputTypeHint;
}
// Get a fall-back format based on the metadata.
private string GetFormat(ModelExplorer modelExplorer, string inputTypeHint, string inputType)
{
string format;
string rfc3339Format;
if (string.Equals("decimal", inputTypeHint, StringComparison.OrdinalIgnoreCase) &&
string.Equals("text", inputType, StringComparison.Ordinal) &&
string.IsNullOrEmpty(modelExplorer.Metadata.EditFormatString))
{
// Decimal data is edited using an <input type="text"/> element, with a reasonable format.
// EditFormatString has precedence over this fall-back format.
format = "{0:0.00}";
}
else if (_rfc3339Formats.TryGetValue(inputType, out rfc3339Format) &&
ViewContext.Html5DateRenderingMode == Html5DateRenderingMode.Rfc3339 &&
!modelExplorer.Metadata.HasNonDefaultEditFormat &&
(typeof(DateTime) == modelExplorer.Metadata.UnderlyingOrModelType || typeof(DateTimeOffset) == modelExplorer.Metadata.UnderlyingOrModelType))
{
// Rfc3339 mode _may_ override EditFormatString in a limited number of cases e.g. EditFormatString
// must be a default format (i.e. came from a built-in [DataType] attribute).
format = rfc3339Format;
}
else
{
// Otherwise use EditFormatString, if any.
format = modelExplorer.Metadata.EditFormatString;
}
return format;
}
private TagBuilder GenerateTextBox(ModelExplorer modelExplorer, string inputTypeHint, string inputType)
{
var format = Format;
if (string.IsNullOrEmpty(format))
{
format = GetFormat(modelExplorer, inputTypeHint, inputType);
}
var htmlAttributes = new Dictionary<string, object>
{
{ "type", inputType }
};
if (string.Equals(inputType, "file") && string.Equals(inputTypeHint, TemplateRenderer.IEnumerableOfIFormFileName))
{
htmlAttributes["multiple"] = "multiple";
}
return Generator.GenerateTextBox(
ViewContext,
modelExplorer,
For.Name,
value: modelExplorer.Model,
format: format,
htmlAttributes: htmlAttributes);
}
private TagBuilder GenerateRadio(ModelExplorer modelExplorer)
{
// Note empty string is allowed.
if (Value == null)
{
throw new InvalidOperationException(Resources.FormatInputTagHelper_ValueRequired(
"<input>",
nameof(Value).ToLowerInvariant(),
"type",
"radio"));
}
return Generator.GenerateRadioButton(
ViewContext,
modelExplorer,
For.Name,
Value,
isChecked: null,
htmlAttributes: null);
}
private void GenerateCheckBox(ModelExplorer modelExplorer, TagHelperOutput output)
{
if (typeof(bool) != modelExplorer.ModelType)
{
throw new InvalidOperationException(Resources.FormatInputTagHelper_InvalidExpressionResult(
"<input>",
ForAttributeName,
modelExplorer.ModelType.FullName,
typeof(bool).FullName,
"type",
"checkbox"));
}
// Prepare to move attributes from current element to <input type="checkbox"/> generated just below.
var htmlAttributes = new Dictionary<string, object>(StringComparer.OrdinalIgnoreCase);
// Perf: Avoid allocating enumerator
// Construct attributes correctly (first attribute wins).
for (var i = 0; i < output.Attributes.Count; i++)
{
var attribute = output.Attributes[i];
if (!htmlAttributes.ContainsKey(attribute.Name))
{
htmlAttributes.Add(attribute.Name, attribute.Value);
}
}
var checkBoxTag = Generator.GenerateCheckBox(
ViewContext,
modelExplorer,
For.Name,
isChecked: null,
htmlAttributes: htmlAttributes);
if (checkBoxTag != null)
{
// Do not generate current element's attributes or tags. Instead put both <input type="checkbox"/> and
// <input type="hidden"/> into the output's Content.
output.Attributes.Clear();
output.TagName = null;
var renderingMode =
output.TagMode == TagMode.SelfClosing ? TagRenderMode.SelfClosing : TagRenderMode.StartTag;
checkBoxTag.TagRenderMode = renderingMode;
output.Content.AppendHtml(checkBoxTag);
var hiddenForCheckboxTag = Generator.GenerateHiddenForCheckbox(ViewContext, modelExplorer, For.Name);
if (hiddenForCheckboxTag != null)
{
hiddenForCheckboxTag.TagRenderMode = renderingMode;
if (ViewContext.FormContext.CanRenderAtEndOfForm)
{
ViewContext.FormContext.EndOfFormContent.Add(hiddenForCheckboxTag);
}
else
{
output.Content.AppendHtml(hiddenForCheckboxTag);
}
}
}
}
// A variant of TemplateRenderer.GetViewNames(). Main change relates to bool? handling.
private static IEnumerable<string> GetInputTypeHints(ModelExplorer modelExplorer)
{
if (!string.IsNullOrEmpty(modelExplorer.Metadata.TemplateHint))
{
yield return modelExplorer.Metadata.TemplateHint;
}
if (!string.IsNullOrEmpty(modelExplorer.Metadata.DataTypeName))
{
yield return modelExplorer.Metadata.DataTypeName;
}
// In most cases, we don't want to search for Nullable<T>. We want to search for T, which should handle
// both T and Nullable<T>. However we special-case bool? to avoid turning an <input/> into a <select/>.
var fieldType = modelExplorer.ModelType;
if (typeof(bool?) != fieldType)
{
fieldType = modelExplorer.Metadata.UnderlyingOrModelType;
}
foreach (string typeName in TemplateRenderer.GetTypeNames(modelExplorer.Metadata, fieldType))
{
yield return typeName;
}
}
public bool Visited(ModelExplorer modelExplorer)
{
return _visitedObjects.Contains(modelExplorer.Model ?? modelExplorer.Metadata.ModelType);
}
/// <summary>
/// Creates a new <see cref="ModelExplorer"/>.
/// </summary>
/// <param name="metadataProvider">The <see cref="IModelMetadataProvider"/>.</param>
/// <param name="container">The container <see cref="ModelExplorer"/>.</param>
/// <param name="metadata">The <see cref="ModelMetadata"/>.</param>
/// <param name="model">The model object. May be <c>null</c>.</param>
public ModelExplorer(
IModelMetadataProvider metadataProvider,
ModelExplorer container,
ModelMetadata metadata,
object model)
{
if (metadataProvider == null)
{
throw new ArgumentNullException(nameof(metadataProvider));
}
if (metadata == null)
{
throw new ArgumentNullException(nameof(metadata));
}
_metadataProvider = metadataProvider;
Container = container;
Metadata = metadata;
_model = model;
}
