internal override void Abort(AjaxPage page, string[] templateNames, System.IO.TextWriter writer)
{
// Write out a render/dispose toggle since it will be interpreted as a template
// and conditionally render. Otherwise, the content within the toggle is not affected
// by the toggle from a rendering perspective.
if (IsTemplate(page))
{
base.Abort(page, templateNames, writer);
}
else
{
AttributeBinding contentTemplateBinding;
if (!TryContentTemplate(page, templateNames, writer, out contentTemplateBinding))
{
base.Abort(page, templateNames, writer);
return;
}
var ownTemplateNames = contentTemplateBinding != null ?
((string)contentTemplateBinding.Value).Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries) :
new string[0];
RenderStartTag(page, writer,
// replace data-sys-attach attribute with sys:attach and add data-continue attribute to notify client that children were allowed to render
attributes => MergeAttribute(AbortSysAttachDataAttribute(attributes), "data-continue", value => "data-continue"),
// abort rendering
true,
// pass in all binding attributes
If == null ? null : If.Evaluate(page),
On == null ? null : On.Evaluate(page),
ClassName == null ? null : ClassName.Evaluate(page),
Action == null ? null : Action.Evaluate(page),
GroupName == null ? null : GroupName.Evaluate(page),
StrictMode == null ? null : StrictMode.Evaluate(page),
When == null ? null : When.Evaluate(page),
contentTemplateBinding);
// continue rendering child blocks in the same data context
foreach (var block in Blocks)
{
block.Render(page, templateNames.Concat(ownTemplateNames).ToArray(), writer);
}
RenderEndTag(writer);
}
}
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);
}
}