public void Truthiness() { Assert.IsFalse(JavaScriptHelpers.IsTruthy(null), "Null is not truthy."); Assert.IsTrue(JavaScriptHelpers.IsTruthy(this), "Non-null object is truthy."); Assert.IsTrue(JavaScriptHelpers.IsTruthy(true), "Boolean value of true is truthy."); Assert.IsFalse(JavaScriptHelpers.IsTruthy(false), "Boolean value of false is not truthy."); Assert.IsTrue(JavaScriptHelpers.IsTruthy((sbyte)42), "Non-zero sbyte value is truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((sbyte)-42), "Non-zero sbyte value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((sbyte)0), "Zero sbyte value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((byte)42), "Non-zero byte value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((byte)0), "Zero byte value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((char)0), "Char value is truthy."); Assert.IsTrue(JavaScriptHelpers.IsTruthy((short)42), "Non-zero short value is truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((short)-42), "Non-zero short value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((short)0), "Zero short value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((ushort)42), "Non-zero ushort value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((ushort)0), "Zero ushort value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((int)42), "Non-zero int value is truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((int)-42), "Non-zero int value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((int)0), "Zero int value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((uint)42), "Non-zero uint value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((uint)0), "Zero uint value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((long)42), "Non-zero long value is truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((long)-42), "Non-zero long value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((long)0), "Zero long value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((ulong)42), "Non-zero ulong value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((ulong)0), "Zero ulong value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((float)42), "Non-zero float value is truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((float)-42), "Non-zero float value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((float)0), "Zero float value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((double)42), "Non-zero double value is truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((double)-42), "Non-zero double value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((double)0), "Zero double value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((decimal)42), "Non-zero decimal value is truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((decimal) - 42), "Non-zero decimal value is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy((decimal)0), "Zero decimal value is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy("42"), "Non-zero length string is truthy"); Assert.IsFalse(JavaScriptHelpers.IsTruthy(""), "Zero length string is not truthy"); Assert.IsTrue(JavaScriptHelpers.IsTruthy((bool?)true), "Nullable values' truthiness is based on the actual value if they do not have a value assigned."); Assert.IsFalse(JavaScriptHelpers.IsTruthy((bool?)false), "Nullable values' truthiness is based on the actual value if they do not have a value assigned."); Assert.IsFalse(JavaScriptHelpers.IsTruthy((char?)null), "Nullable values are not truthy if they do not have a value assigned."); }
public void Abort(System.IO.TextWriter writer, bool isHtmlBool) { // Bound attribute if (binding != null) { RenderAttribute(writer, attribute.Name, attribute.Binding.Expression); } // Simple attribute else if (!isHtmlBool) { RenderAttribute(writer, attribute.Name, attribute.Value); } else if (JavaScriptHelpers.IsTruthy(attribute.Value)) { RenderAttribute(writer, attribute.Name, attribute.Name); } }
protected bool TryRenderIf(AjaxPage page, IEnumerable <string> templateNames, System.IO.TextWriter writer, out AttributeBinding ifBinding, out bool canRender) { if (If == null) { ifBinding = null; canRender = true; return(true); } ifBinding = If.Evaluate(page); if (!ifBinding.IsValid) { canRender = false; return(false); } canRender = JavaScriptHelpers.IsTruthy(ifBinding.Value); return(true); }
internal override void Render(AjaxPage page, string[] templateNames, System.IO.TextWriter writer) { bool canRender; AttributeBinding ifBinding; if (!TryRenderIf(page, templateNames, writer, out ifBinding, out canRender)) { Abort(page, templateNames, writer); return; } if (!canRender) { return; } // Output the original template if toggle on was not specified if (On == null) { Abort(page, templateNames, writer); return; } // Get the data associated with the data view var onBinding = On.Evaluate(page); // Output the original template if no data for on was found if (!onBinding.IsValid) { Abort(page, templateNames, writer); return; } var onValue = onBinding.Value; var classValue = ""; var classBinding = (AttributeBinding)null; if (ClassName != null) { classBinding = ClassName.Evaluate(page); // Output the original template if no data for class was found if (!classBinding.IsValid) { Abort(page, templateNames, writer); return; } classValue = (string)classBinding.Value; } ToggleAction?actionValue; var actionBinding = (AttributeBinding)null; // Get the value of the toggle action (i.e.: show, hide, etc.) if (Action != null) { actionBinding = Action.Evaluate(page); // Output the original template if no data for action was found if (!actionBinding.IsValid) { Abort(page, templateNames, writer); return; } actionValue = (ToggleAction)Enum.Parse(typeof(ToggleAction), (string)actionBinding.Value, true); } else if (!string.IsNullOrEmpty(classValue)) { actionValue = ToggleAction.AddClass; } else { actionValue = ToggleAction.Show; } var groupNameBinding = (AttributeBinding)null; if (GroupName != null) { groupNameBinding = GroupName.Evaluate(page); // Output the original template if no data for group name was found if (!groupNameBinding.IsValid) { Abort(page, templateNames, writer); return; } } var strictModeValue = false; var strictModeBinding = (AttributeBinding)null; if (StrictMode != null) { strictModeBinding = StrictMode.Evaluate(page); // Output the original template if no data for strict mode was found if (!strictModeBinding.IsValid) { Abort(page, templateNames, writer); return; } if (strictModeBinding.Value is bool) { strictModeValue = (bool)strictModeBinding.Value; } else { strictModeValue = bool.Parse((string)strictModeBinding.Value); } } bool?equals; var whenBinding = (AttributeBinding)null; // Evaluate whether the on and when conditions are equal or // satisified, which determines whether the toggle is on or off if (When == null) { if (strictModeValue) { // In strict mode the on value must be a boolean true if (!(onValue is bool)) { throw new ApplicationException(string.Format("With strict mode enabled, toggle:on should be a value of type Boolean, actual type \"{0}\".", onValue == null ? "null" : onValue.GetType().Name)); } equals = (bool)onValue; } else if (onValue is System.Collections.IEnumerable) { equals = false; // Satisfied if there are any items foreach (object o in (System.Collections.IEnumerable)onValue) { equals = true; break; } } else { // Otherwise, check to see that the on value is "truthy" equals = JavaScriptHelpers.IsTruthy(onValue); } } else { whenBinding = When.Evaluate(page); var whenValue = whenBinding.Value; if (whenValue == null) { equals = (onValue == null); } else if (whenValue is FunctionInstance) { object result; try { result = Page.ScriptMarshaller.Unwrap(((FunctionInstance)whenValue).Call(null, Page.ScriptMarshaller.Wrap(onValue))); } catch { Abort(page, templateNames, writer); return; } if (strictModeValue) { if (!(result is bool)) { throw new ApplicationException(string.Format("With strict mode enabled, toggle:when function should return a value of type Boolean, found type \"{0}\".", result == null ? "null" : result.GetType().Name)); } equals = (bool)result; } else { equals = JavaScriptHelpers.IsTruthy(result); } } else { equals = whenValue.Equals(onValue); } } // If no class value is defined then abort if ((actionValue == ToggleAction.AddClass || actionValue == ToggleAction.RemoveClass) && string.IsNullOrEmpty(classValue)) { Abort(page, templateNames, writer); return; } bool render = actionValue == ToggleAction.Render || actionValue == ToggleAction.Dispose; AttributeBinding contentTemplateBinding; if (!TryContentTemplate(page, templateNames, writer, out contentTemplateBinding)) { Abort(page, templateNames, writer); return; } var ownTemplateNames = contentTemplateBinding != null ? ((string)contentTemplateBinding.Value).Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries) : new string[0]; using (var context = render ? page.BeginContext(page.Context.DataItem, null) : null) { RenderStartTag(page, writer, attrs => MergeAttribute(MergeAttribute(MergeAttribute(attrs, "class", value => { if (actionValue == ToggleAction.AddClass || actionValue == ToggleAction.RemoveClass) { if ((actionValue == ToggleAction.AddClass && equals.Value) || (actionValue == ToggleAction.RemoveClass && !equals.Value)) { value = AttributeHelper.EnsureClassName(value, classValue); } else { value = AttributeHelper.RemoveClassName(value, classValue); } } // Add/remove the "toggle-on" and "toggle-off" classes based on state value = AttributeHelper.EnsureClassName(value, equals.Value ? "toggle-on" : "toggle-off"); value = AttributeHelper.RemoveClassName(value, equals.Value ? "toggle-off" : "toggle-on"); return(value); }).ToArray(), "style", value => { if (actionValue == ToggleAction.Show || actionValue == ToggleAction.Hide || actionValue == ToggleAction.Render || actionValue == ToggleAction.Dispose) { if (((actionValue == ToggleAction.Show || actionValue == ToggleAction.Render) && equals.Value) || ((actionValue == ToggleAction.Hide || actionValue == ToggleAction.Dispose) && !equals.Value)) { if (AttributeHelper.GetCssStyle(value, "display") == "none") { value = AttributeHelper.RemoveCssStyle(value, "display"); } } else { value = AttributeHelper.EnsureCssStyle(value, "display", "none"); } } return(value); }).ToArray(), "disabled", value => { if (actionValue == ToggleAction.Enable || actionValue == ToggleAction.Disable) { if ((actionValue == ToggleAction.Enable && equals.Value) || (actionValue == ToggleAction.Disable && !equals.Value)) { value = null; } else { value = "disabled"; } } return(value); }), ifBinding, onBinding, classBinding, actionBinding, groupNameBinding, strictModeBinding, whenBinding, contentTemplateBinding, // If this is render/dispose, include the nested template index as a special attribute render ? new AttributeBinding(new Attribute() { Name = "data-sys-tmplidx", Value = NestedTemplateIndex.ToString() }, null) : null, render ? new AttributeBinding(new Attribute() { Name = "data-sys-tcindex", Value = context.Id }, null) : null); // Only render the inner blocks if the template would be rendered client-side if (!render || (actionValue == ToggleAction.Render && equals.Value) || (actionValue == ToggleAction.Dispose && !equals.Value)) { foreach (var block in Blocks) { block.Render(page, templateNames.Concat(ownTemplateNames).ToArray(), writer); } } RenderEndTag(writer); } }
protected void RenderStartTag(AjaxPage page, System.IO.TextWriter writer, Func <IEnumerable <AttributeBinding>, IEnumerable <AttributeBinding> > attributeTransform, bool abort, params AttributeBinding[] bindings) { // Immediately abort if no tag name if (Tag == null) { return; } // Open Tag writer.Write("<" + Tag); // Attributes string innerContent = null; var attributes = (Attributes ?? new List <Attribute>()) .Select(attribute => attribute.Binding == null ? new AttributeBinding(attribute, null) : attribute.Binding.Evaluate(page)); // Adding binding attributes if necessary if (bindings != null && bindings.Length > 0) { attributes = attributes.Concat(bindings.Where(b => b != null)); } // Transform the attributes if necessary if (attributeTransform != null) { attributes = attributeTransform(attributes); } string classNames = null; bool foundId = false; bool isTextArea = Tag.Equals("textarea", StringComparison.InvariantCultureIgnoreCase); var attrs = attributes.ToArray(); // Write the attributes to the output stream foreach (var attribute in attrs) { // Ensure that multiple id attributes are not specified if (!page.Context.IsGlobal && (attribute.Name == "id" || attribute.Name == "sys:id")) { if (foundId) { throw new ApplicationException("Found multiple id attributes: " + Markup); } foundId = true; } // Determine if the attribute represents bound element content if (attribute.IsBound) { if (attribute.Name == "sys:innerhtml" || (isTextArea && attribute.Name == "sys:value")) { innerContent = (attribute.DisplayValue ?? ""); } else if (attribute.Name == "sys:innertext") { innerContent = HttpUtility.HtmlEncode(attribute.DisplayValue ?? ""); } } bool isHtmlBoolean; var attributeName = attribute.Name.StartsWith("sys:") ? attribute.Name.Substring(4) : attribute.Name; if (Tag.Equals("input", StringComparison.InvariantCultureIgnoreCase)) { var attr = attrs.SingleOrDefault(a => a.Name.Equals("type", StringComparison.InvariantCultureIgnoreCase) && a.IsValid && a.Value != null); if (attr == null) { isHtmlBoolean = HtmlHelpers.IsBooleanAttribute(attributeName, Tag, null, true); } else { isHtmlBoolean = HtmlHelpers.IsBooleanAttribute(attributeName, Tag, attr.Value.ToString()); } } else { isHtmlBoolean = HtmlHelpers.IsBooleanAttribute(attributeName, Tag); } if (abort) { attribute.Abort(writer, isHtmlBoolean); } else { if (attribute.Name == "class") { if (classNames == null) { classNames = (string)attribute.Value; } else { classNames += " " + (string)attribute.Value; } } else { if (attribute.Name.StartsWith("sys:class-")) { // If binding evaluates as truthy, then render the store the class name if (JavaScriptHelpers.IsTruthy(attribute.Value)) { string sysClassValue = attribute.Name.Substring(10); if (classNames == null) { classNames = sysClassValue; } else { classNames += (classNames.Length > 0 ? " " : "") + sysClassValue; } } } attribute.Render(page, writer, isHtmlBoolean, !page.Context.IsGlobal, isTextArea); } } } // Write direct class and sys:class- attribute values together. Note: by checking // for null we may be avoiding writing a class attribute altogether whereas the // client framework would have produced an empty class attribute. if (classNames != null) { writer.Write(" class=\""); HttpUtility.HtmlAttributeEncode(classNames, writer); writer.Write("\""); } // Close Tag if (IsEmpty) { if (!string.IsNullOrEmpty(innerContent)) { writer.Write(">" + innerContent + "</" + Tag + ">"); } else if (HtmlHelpers.IsSelfClosing(Tag)) { writer.Write(" />"); } else { writer.Write("></" + Tag + ">"); } } else if (!string.IsNullOrEmpty(innerContent)) { writer.Write(">" + innerContent); } else { writer.Write(">"); } }
public void Render(AjaxPage page, System.IO.TextWriter writer, bool isHtmlBool, bool generateIds, bool isTextArea) { // Bound attribute if (binding != null) { // Valid binding if (binding.IsValid) { // Render the binding value for sys attributes if (attribute.Name.StartsWith("sys:")) { var attributeName = attribute.Name.Substring(4); // Render two-way binding expressions if (attribute.Binding.IsTwoWay) { RenderAttribute(writer, "data-sys-" + attributeName, attribute.Binding.Expression); } if (binding.Value != null) { if (attributeName != "if" && attributeName != "innerhtml" && attributeName != "innertext" && !(isTextArea && attributeName == "value") && !attribute.Name.StartsWith("sys:class-")) { if (isHtmlBool) { if (JavaScriptHelpers.IsTruthy(binding.Value)) { RenderAttribute(writer, attributeName, attributeName); } } else { RenderAttribute(writer, attributeName, binding.Value.ToString()); } } } } else { RenderAttribute(writer, "data-" + attribute.Name.Replace(':', '-'), attribute.Binding.Expression); } } // Invalid binding else { RenderAttribute(writer, attribute.Name, attribute.Binding.Expression); } } else if (generateIds && (attribute.Name == "id" || attribute.Name == "sys:id")) { RenderAttribute(writer, "id", page.Context.GetInstanceId(attribute.Value)); } // Simple attribute else if (attribute.Name.Contains(":") && attribute.Name != "sys:id") { RenderAttribute(writer, "data-" + attribute.Name.Replace(':', '-'), attribute.Value); } else if (isHtmlBool) { if (JavaScriptHelpers.IsTruthy(attribute.Value)) { RenderAttribute(writer, attribute.Name, attribute.Name); } } else { RenderAttribute(writer, attribute.Name, attribute.Value); } }