internal IHtmlContent?GenerateHint(TagHelperContext tagHelperContext, FormGroupContext formGroupContext)
{
var content = formGroupContext.Hint?.Content;
var attributes = formGroupContext.Hint?.Attributes;
if (content == null && AspFor != null)
{
var description = ModelHelper.GetDescription(AspFor.ModelExplorer);
if (description != null)
{
content = new HtmlString(description);
}
}
if (content != null)
{
var resolvedIdPrefix = ResolveIdPrefix();
var hintId = resolvedIdPrefix + "-hint";
DescribedBy = AppendToDescribedBy(DescribedBy, hintId);
return(Generator.GenerateHint(hintId, content, attributes));
}
else
{
return(null);
}
}
private protected override IHtmlContent GenerateFormGroupContent(
TagHelperContext tagHelperContext,
FormGroupContext formGroupContext,
TagHelperOutput tagHelperOutput,
IHtmlContent childContent,
out bool haveError)
{
var radiosContext = tagHelperContext.GetContextItem <RadiosContext>();
var contentBuilder = new HtmlContentBuilder();
var hint = GenerateHint(tagHelperContext, formGroupContext);
if (hint != null)
{
contentBuilder.AppendHtml(hint);
}
var errorMessage = GenerateErrorMessage(tagHelperContext, formGroupContext);
if (errorMessage != null)
{
contentBuilder.AppendHtml(errorMessage);
}
haveError = errorMessage != null;
var haveFieldset = radiosContext.Fieldset != null;
var radiosTagBuilder = GenerateRadios();
contentBuilder.AppendHtml(radiosTagBuilder);
if (haveFieldset)
{
return(Generator.GenerateFieldset(
DescribedBy,
role: null,
radiosContext.Fieldset !.Legend?.IsPageHeading,
radiosContext.Fieldset.Legend?.Content,
radiosContext.Fieldset.Legend?.Attributes,
content: contentBuilder,
radiosContext.Fieldset.Attributes));
}
return(contentBuilder);
TagBuilder GenerateRadios()
{
var resolvedIdPrefix = ResolveIdPrefix();
TryResolveName(out var resolvedName);
return(Generator.GenerateRadios(
resolvedIdPrefix,
resolvedName,
items: radiosContext.Items,
attributes: RadiosAttributes.ToAttributeDictionary()));
}
}
private protected override IHtmlContent GenerateFormGroupContent(
TagHelperContext tagHelperContext,
FormGroupContext formGroupContext,
TagHelperOutput tagHelperOutput,
IHtmlContent childContent,
out bool haveError)
{
var contentBuilder = new HtmlContentBuilder();
var label = GenerateLabel(formGroupContext);
contentBuilder.AppendHtml(label);
var hint = GenerateHint(tagHelperContext, formGroupContext);
if (hint != null)
{
contentBuilder.AppendHtml(hint);
}
var errorMessage = GenerateErrorMessage(tagHelperContext, formGroupContext);
if (errorMessage != null)
{
contentBuilder.AppendHtml(errorMessage);
}
haveError = errorMessage != null;
var inputTagBuilder = GenerateFileUpload(haveError);
contentBuilder.AppendHtml(inputTagBuilder);
return(contentBuilder);
TagBuilder GenerateFileUpload(bool haveError)
{
var resolvedId = ResolveIdPrefix();
var resolvedName = ResolveName();
return(Generator.GenerateFileUpload(
haveError,
resolvedId,
resolvedName,
DescribedBy,
InputAttributes.ToAttributeDictionary()));
}
}
internal IHtmlContent GenerateLabel(FormGroupContext formGroupContext)
{
// We need some content for the label; if AspFor is null then label content must have been specified
if (AspFor == null && formGroupContext.Label?.Content == null)
{
throw new InvalidOperationException(
$"Label content must be specified when the '{AspForAttributeName}' attribute is not specified.");
}
var resolvedIdPrefix = ResolveIdPrefix();
var isPageHeading = formGroupContext.Label?.IsPageHeading ?? ComponentGenerator.LabelDefaultIsPageHeading;
var content = formGroupContext.Label?.Content;
var attributes = formGroupContext.Label?.Attributes;
var resolvedContent = content ??
new HtmlString(ModelHelper.GetDisplayName(ViewContext, AspFor !.ModelExplorer, AspFor.Name));
return(Generator.GenerateLabel(resolvedIdPrefix, isPageHeading, resolvedContent, attributes));
}
private protected abstract IHtmlContent GenerateFormGroupContent(
TagHelperContext tagHelperContext,
FormGroupContext formGroupContext,
TagHelperOutput tagHelperOutput,
IHtmlContent childContent,
out bool haveError);
internal IHtmlContent?GenerateErrorMessage(TagHelperContext tagHelperContext, FormGroupContext formGroupContext)
{
var visuallyHiddenText = formGroupContext.ErrorMessage?.VisuallyHiddenText ??
ComponentGenerator.ErrorMessageDefaultVisuallyHiddenText;
var content = formGroupContext.ErrorMessage?.Content;
var attributes = formGroupContext.ErrorMessage?.Attributes;
if (content == null && AspFor != null && IgnoreModelStateErrors != true)
{
var validationMessage = ModelHelper.GetValidationMessage(
ViewContext,
AspFor !.ModelExplorer,
AspFor.Name);
if (validationMessage != null)
{
content = new HtmlString(validationMessage);
}
}
if (content != null)
{
AddErrorToFormErrorContext();
var resolvedIdPrefix = ResolveIdPrefix();
var errorId = resolvedIdPrefix + "-error";
DescribedBy = AppendToDescribedBy(DescribedBy, errorId);
attributes ??= new AttributeDictionary();
attributes["id"] = errorId;
return(Generator.GenerateErrorMessage(visuallyHiddenText, content, attributes));
}
else
{
return(null);
}
void AddErrorToFormErrorContext()
{
if (tagHelperContext.Items.TryGetValue(typeof(FormErrorContext), out var formErrorContextObj) &&
formErrorContextObj is FormErrorContext formErrorContext)
{
var errorFieldId = GetErrorFieldId(tagHelperContext);
var href = "#" + errorFieldId;
formErrorContext.AddError(content, href);
}
}
}
private protected override IHtmlContent GenerateFormGroupContent(
TagHelperContext tagHelperContext,
FormGroupContext formGroupContext,
TagHelperOutput tagHelperOutput,
IHtmlContent childContent,
out bool haveError)
{
var contentBuilder = new HtmlContentBuilder();
var label = GenerateLabel(formGroupContext);
contentBuilder.AppendHtml(label);
var hint = GenerateHint(tagHelperContext, formGroupContext);
if (hint != null)
{
contentBuilder.AppendHtml(hint);
}
var errorMessage = GenerateErrorMessage(tagHelperContext, formGroupContext);
if (errorMessage != null)
{
contentBuilder.AppendHtml(errorMessage);
}
haveError = errorMessage != null;
var textAreaTagBuilder = GenerateTextArea(haveError);
contentBuilder.AppendHtml(textAreaTagBuilder);
return(contentBuilder);
TagBuilder GenerateTextArea(bool haveError)
{
var textAreaContext = tagHelperContext.GetContextItem <TextAreaContext>();
var resolvedId = ResolveIdPrefix();
var resolvedName = ResolveName();
var resolvedContent = textAreaContext.Value ??
new HtmlString(AspFor != null ? ModelHelper.GetModelValue(ViewContext, AspFor.ModelExplorer, AspFor.Name) : string.Empty);
var resolvedTextAreaAttributes = TextAreaAttributes.ToAttributeDictionary();
resolvedTextAreaAttributes.MergeCssClass("govuk-js-textarea");
return(Generator.GenerateTextArea(
haveError,
resolvedId,
resolvedName,
Rows,
DescribedBy,
Autocomplete,
Spellcheck,
Disabled,
resolvedContent,
resolvedTextAreaAttributes));
}
}
