/// <summary>
///
/// </summary>
/// <param name="page"></param>
/// <returns></returns>
internal bool IsTemplate(AjaxPage page)
{
bool result = false;
if (Action != null)
{
// action is literal render/dispose
if (Action.Expression == "render" || Action.Expression == "dispose")
{
result = true;
}
else
{
// if not within a dataview or template, then any binding expressions
// for toggle action would not be dependent on template context data,
// so use the newly created page instance with a null context
var action = Action.Evaluate(page == null ? Page.Current as AjaxPage : page);
if (action.IsValid && (action.DisplayValue == "render" || action.DisplayValue == "dispose"))
{
result = true;
}
}
}
return(result);
}
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;
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];
RenderStartTag(page, writer, ifBinding, contentTemplateBinding);
foreach (var block in Blocks)
block.Render(page, templateNames.Concat(ownTemplateNames).ToArray(), writer);
RenderEndTag(writer);
}
protected bool TryContentTemplate(AjaxPage page, IEnumerable <string> templateNames, System.IO.TextWriter writer, out AttributeBinding contentTemplateBinding)
{
if (ContentTemplate == null)
{
contentTemplateBinding = null;
return(true);
}
contentTemplateBinding = ContentTemplate.Evaluate(page);
return(contentTemplateBinding.IsValid && contentTemplateBinding.Value is string);
}
internal override AttributeBinding Evaluate(AjaxPage page)
{
var path = Path;
string sourcePath;
if (Parameters.TryGetValue("source", out sourcePath) && sourcePath.Length > 0)
{
path = sourcePath + "." + path;
}
var result = page.EvaluatePath(path);
if (result.IsValid)
{
if (result.Value == null)
{
string nullValue;
if (Parameters.TryGetValue("nullValue", out nullValue))
{
result.Value = nullValue;
}
}
else
{
string format;
if (Parameters.TryGetValue("format", out format) && !string.IsNullOrEmpty(format) && result.Value is IFormattable)
{
result.Value = ((IFormattable)result.Value).ToString(format, null);
}
else
{
string transformText;
if (transform == null && Parameters.TryGetValue("transform", out transformText) && transformText.Length > 0)
{
transform = Transform.Compile(transformText);
}
if (result.IsValid && transform != null)
{
IEnumerable transformed;
result.IsValid = transform.TryExecute(page, (IEnumerable)result.Value, out transformed);
result.Value = result.IsValid ? transformed : null;
}
}
}
}
return(new AttributeBinding(Attribute, result));
}
internal override AttributeBinding Evaluate(AjaxPage page)
{
// Evaluate the binding path
var result = page.EvaluatePath(Path);
// Invalid result
if (result.Property == null)
{
result.IsValid = false;
}
// # syntax
else if (Extension == "#")
{
string format = null;
Parameters.TryGetValue("format", out format);
string value;
result.IsValid = Adapter.TryGetDisplayValue(result.Property, format, result.Value, out value);
result.Value = value;
}
// @ syntax
else if (Extension == "@")
{
if (string.IsNullOrEmpty(Path))
{
if (!(page.Context.DataItem is Adapter))
{
throw new ApplicationException("No path was specified for the \"@\" markup extension, and the source is not an adapter.");
}
result.Value = page.Context.DataItem;
}
else
{
ExoWeb.OnBeforeCreateAdapter(this, result.Source, result.Property);
result = new BindingResult()
{
Value = new Adapter(result, Parameters),
IsValid = result.IsValid,
Property = result.Property,
Source = result.Source
};
}
}
return(new AttributeBinding(Attribute, result));
}
internal override void Render(AjaxPage page, string[] templateNames, TextWriter writer)
{
try
{
ExoWeb.OnBeginRender(page, this);
foreach (var block in Blocks)
{
block.Render(page, templateNames.Concat(ContentTemplateNames).ToArray(), writer);
}
}
finally
{
ExoWeb.OnEndRender(page, this);
}
}
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);
}
}
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 AttributeBinding Evaluate(AjaxPage page)
{
IEnumerable <KeyValuePair <string, object> > arguments = page.Context.Variables.Concat(new KeyValuePair <string, object>[] {
new KeyValuePair <string, object>("$dataItem", page.Context.DataItem),
new KeyValuePair <string, object>("$index", page.Context.Index),
new KeyValuePair <string, object>("$context", page.Context),
new KeyValuePair <string, object>("$id", (Func <string, string>)(id => page.Context.GetInstanceId(id))),
});
if (!isValid)
{
return(new AttributeBinding(Attribute, BindingResult.Invalid));
}
else
{
if (script == null)
{
lock (this)
{
if (script == null)
{
script = new JavaScript.ScriptFunction(Page.ScriptEngineFactory, arguments.Select(a => a.Key), Path);
}
}
}
try
{
return(new AttributeBinding(Attribute, new BindingResult()
{
Value = script.Evaluate(arguments.Select(a => a.Value), Page.ScriptMarshaller), IsValid = true
}));
}
catch
{
isValid = false;
return(new AttributeBinding(Attribute, BindingResult.Invalid));
}
}
}
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;
}
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];
RenderStartTag(page, writer, ifBinding, contentTemplateBinding);
foreach (var block in Blocks)
{
block.Render(page, templateNames.Concat(ownTemplateNames).ToArray(), writer);
}
RenderEndTag(writer);
}
protected void RenderStartTag(AjaxPage page, System.IO.TextWriter writer, params AttributeBinding[] bindings)
{
RenderStartTag(page, writer, null, bindings);
}
internal override AttributeBinding Evaluate(AjaxPage page)
{
return binding;
}
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;
}
/// <summary>
/// Renders the block to the specified writer in the context of the specified page.
/// </summary>
/// <param name="page"></param>
/// <param name="templateNames"></param>
/// <param name="writer"></param>
internal virtual void Render(AjaxPage page, string[] templateNames, TextWriter writer)
{
writer.Write(Markup);
}
internal override AttributeBinding Evaluate(AjaxPage page)
{
IEnumerable<KeyValuePair<string, object>> arguments = page.Context.Variables.Concat( new KeyValuePair<string, object>[] {
new KeyValuePair<string, object>("$dataItem", page.Context.DataItem),
new KeyValuePair<string, object>("$index", page.Context.Index),
new KeyValuePair<string, object>("$context", page.Context),
new KeyValuePair<string, object>("$id", (Func<string, string>)(id => page.Context.GetInstanceId(id))),
});
if (!isValid)
return new AttributeBinding(Attribute, BindingResult.Invalid);
else
{
if (script == null)
{
lock (this)
{
if (script == null)
script = new JavaScript.ScriptFunction(Page.ScriptEngineFactory, arguments.Select(a => a.Key), Path);
}
}
try
{
return new AttributeBinding(Attribute, new BindingResult() { Value = script.Evaluate(arguments.Select(a => a.Value), Page.ScriptMarshaller), IsValid = true });
}
catch
{
isValid = false;
return new AttributeBinding(Attribute, BindingResult.Invalid);
}
}
}
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);
}
}
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 abstract AttributeBinding Evaluate(AjaxPage page);
internal override void Render(AjaxPage page, string[] templateNames, System.IO.TextWriter writer)
{
RenderStartTag(page, writer);
}
/// <summary>
/// Render the data view to the output for the current page.
/// </summary>
/// <param name="page"></param>
/// <param name="templateNames"></param>
/// <param name="writer"></param>
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 data source was not specified
if (Data == null)
{
Abort(page, templateNames, writer);
return;
}
// Get the data associated with the data view
var dataBinding = Data.Evaluate(page);
// Output the original template if no data was found
if (!dataBinding.IsValid)
{
Abort(page, templateNames, writer);
return;
}
// Render the inline template for top level dataviews
string templateId = null;
string controlId = null;
bool renderControlId = false;
if (page.Context.IsGlobal)
{
templateId = page.NextControlId;
controlId = Attributes.Where(a => a.Name == "id").Select(a => a.Value).FirstOrDefault();
if (controlId == null)
{
renderControlId = true;
controlId = page.NextControlId;
}
writer.Write("<");
writer.Write(Tag);
writer.Write(" class='sys-template' id='");
writer.Write(templateId);
writer.Write("'>");
writer.Write(Template);
writer.Write("</");
writer.Write(Tag);
writer.Write(">");
}
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];
RenderStartTag(page, writer, ifBinding, dataBinding, contentTemplateBinding,
// Include the nested template index as a special attribute
new AttributeBinding(new Attribute() { Name = "data-sys-tmplidx", Value = NestedTemplateIndex.ToString() }, null),
// If this is a top-level dataview then we will need to ensure an id so that linking can occur
renderControlId ? new AttributeBinding(new Attribute() { Name = "id", Value = controlId }, null) : null);
// Convert the data into a list
IEnumerable list;
if (dataBinding.Value == null)
list = new object[0];
else if (dataBinding.Value is IEnumerable && !(dataBinding.Value is string))
list = (IEnumerable) dataBinding.Value;
else
list = new[] {dataBinding.Value};
// Process the template for each list item
var index = 0;
foreach (var item in list)
{
// Begin a new template context
using (var context = page.BeginContext(item, index++, null))
{
RenderContextBeginMarker(context, Tag, writer);
foreach (var block in Blocks)
block.Render(page, templateNames.Concat(ownTemplateNames).ToArray(), writer);
RenderContextEndMarker(context, Tag, writer);
}
}
RenderEndTag(writer);
// Render script linking logic
if (page.Context.IsGlobal)
writer.Write("<script type=\"text/javascript\">$exoweb({{ domReady: function() {{ Sys.Application.linkElement(document.getElementById(\"{0}\"), document.getElementById(\"{1}\")); }} }});</script>", controlId, templateId);
}
/// <summary>
/// Renders the block to the specified writer in the context of the specified page.
/// </summary>
/// <param name="page"></param>
/// <param name="templateNames"></param>
/// <param name="writer"></param>
internal virtual void Render(AjaxPage page, string[] templateNames, TextWriter writer)
{
writer.Write(Markup);
}
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);
}
}
internal abstract AttributeBinding Evaluate(AjaxPage page);
internal override AttributeBinding Evaluate(AjaxPage page)
{
var path = Path;
string sourcePath;
if (Parameters.TryGetValue("source", out sourcePath) && sourcePath.Length > 0)
path = sourcePath + "." + path;
var result = page.EvaluatePath(path);
if (result.IsValid)
{
if (result.Value == null)
{
string nullValue;
if (Parameters.TryGetValue("nullValue", out nullValue))
result.Value = nullValue;
}
else
{
string format;
if (Parameters.TryGetValue("format", out format) && !string.IsNullOrEmpty(format) && result.Value is IFormattable)
result.Value = ((IFormattable)result.Value).ToString(format, null);
else
{
string transformText;
if (transform == null && Parameters.TryGetValue("transform", out transformText) && transformText.Length > 0)
transform = Transform.Compile(transformText);
if (result.IsValid && transform != null)
{
IEnumerable transformed;
result.IsValid = transform.TryExecute(page, (IEnumerable)result.Value, out transformed);
result.Value = result.IsValid ? transformed : null;
}
}
}
}
return new AttributeBinding(Attribute, result);
}
protected void RenderStartTag(AjaxPage page, System.IO.TextWriter writer, Func <IEnumerable <AttributeBinding>, IEnumerable <AttributeBinding> > attributeTransform, params AttributeBinding[] bindings)
{
RenderStartTag(page, writer, attributeTransform, false, bindings);
}
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(">");
}
}
internal override void Render(AjaxPage page, string[] templateNames, TextWriter writer)
{
try
{
ExoWeb.OnBeginRender(page, this);
foreach (var block in Blocks)
block.Render(page, templateNames.Concat(ContentTemplateNames).ToArray(), writer);
}
finally
{
ExoWeb.OnEndRender(page, this);
}
}
/// <summary>
/// Render the data view to the output for the current page.
/// </summary>
/// <param name="page"></param>
/// <param name="templateNames"></param>
/// <param name="writer"></param>
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 data source was not specified
if (Data == null)
{
Abort(page, templateNames, writer);
return;
}
// Get the data associated with the data view
var dataBinding = Data.Evaluate(page);
// Output the original template if no data was found
if (!dataBinding.IsValid)
{
Abort(page, templateNames, writer);
return;
}
// Render the inline template for top level dataviews
string templateId = null;
string controlId = null;
bool renderControlId = false;
if (page.Context.IsGlobal)
{
templateId = page.NextControlId;
controlId = Attributes.Where(a => a.Name == "id").Select(a => a.Value).FirstOrDefault();
if (controlId == null)
{
renderControlId = true;
controlId = page.NextControlId;
}
writer.Write("<");
writer.Write(Tag);
writer.Write(" class='sys-template' id='");
writer.Write(templateId);
writer.Write("'>");
writer.Write(Template);
writer.Write("</");
writer.Write(Tag);
writer.Write(">");
}
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];
RenderStartTag(page, writer, ifBinding, dataBinding, contentTemplateBinding,
// Include the nested template index as a special attribute
new AttributeBinding(new Attribute()
{
Name = "data-sys-tmplidx", Value = NestedTemplateIndex.ToString()
}, null),
// If this is a top-level dataview then we will need to ensure an id so that linking can occur
renderControlId ? new AttributeBinding(new Attribute()
{
Name = "id", Value = controlId
}, null) : null);
// Convert the data into a list
IEnumerable list;
if (dataBinding.Value == null)
{
list = new object[0];
}
else if (dataBinding.Value is IEnumerable && !(dataBinding.Value is string))
{
list = (IEnumerable)dataBinding.Value;
}
else
{
list = new[] { dataBinding.Value }
};
// Process the template for each list item
var index = 0;
foreach (var item in list)
{
// Begin a new template context
using (var context = page.BeginContext(item, index++, null))
{
RenderContextBeginMarker(context, Tag, writer);
foreach (var block in Blocks)
{
block.Render(page, templateNames.Concat(ownTemplateNames).ToArray(), writer);
}
RenderContextEndMarker(context, Tag, writer);
}
}
RenderEndTag(writer);
// Render script linking logic
if (page.Context.IsGlobal)
{
writer.Write("<script type=\"text/javascript\">$exoweb({{ domReady: function() {{ Sys.Application.linkElement(document.getElementById(\"{0}\"), document.getElementById(\"{1}\")); }} }});</script>", controlId, templateId);
}
}
/// <summary>
///
/// </summary>
/// <param name="page"></param>
/// <returns></returns>
internal bool IsTemplate(AjaxPage page)
{
bool result = false;
if (Action != null)
{
// action is literal render/dispose
if (Action.Expression == "render" || Action.Expression == "dispose")
result = true;
else
{
// if not within a dataview or template, then any binding expressions
// for toggle action would not be dependent on template context data,
// so use the newly created page instance with a null context
var action = Action.Evaluate(page == null ? Page.Current as AjaxPage : page);
if (action.IsValid && (action.DisplayValue == "render" || action.DisplayValue == "dispose"))
result = true;
}
}
return result;
}
internal override void Render(AjaxPage page, string[] templateNames, System.IO.TextWriter writer)
{
RenderStartTag(page, 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 data source was not specified
if (Data == null)
{
Abort(page, templateNames, writer);
return;
}
// Get the data associated with the content control
var dataBinding = Data.Evaluate(page);
var templateBinding = Template != null ? Template.Evaluate(page) : null;
var dataTypeBinding = DataType != null ? DataType.Evaluate(page) : null;
// Output the original template if the data binding expression could not be evaluated
if ((!dataBinding.IsValid && (dataTypeBinding == null || !dataTypeBinding.IsValid)) || (templateBinding != null && !templateBinding.IsValid))
{
Abort(page, templateNames, writer);
return;
}
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];
// Just render an empty content element if the data is null
if (dataBinding.IsValid && dataBinding.Value == null)
{
RenderStartTag(page, writer, ifBinding, dataBinding, contentTemplateBinding);
RenderEndTag(writer);
return;
}
// Get the binding data
object data;
bool isAdapter;
ModelType referenceType;
Type valueType;
bool isList;
// Valid binding
if (dataBinding.IsValid)
{
data = dataBinding.Value;
isAdapter = data is Adapter;
object realData = isAdapter ? ((Adapter)data).RawValue : data;
ModelProperty property = dataBinding.Property;
referenceType = realData is ModelInstance ? ((ModelInstance)realData).Type :
property is ModelReferenceProperty ? ((ModelReferenceProperty)property).PropertyType : null;
valueType = realData != null && !(realData is ModelInstance || realData is IEnumerable<ModelInstance>) ? realData.GetType() :
property is ModelValueProperty ? ((ModelValueProperty)property).PropertyType : null;
isList = (property != null && property.IsList) || (realData is IEnumerable && !(realData is string));
}
// Datatype hint only
else
{
var dataType = (string)dataTypeBinding.Value;
isAdapter = Data is Binding.AdapterExtension || dataType == "ExoWeb.View.Adapter";
isList = dataType.EndsWith("[]");
if (isList)
dataType = dataType.Substring(0, dataType.Length - 2);
valueType = dataType == "String" ? typeof(string) : dataType == "Number" ? typeof(decimal) : dataType == "Date" ? typeof(DateTime) : dataType == "Boolean" ? typeof(bool) : null;
referenceType = valueType == null ? ModelContext.Current.GetModelType(dataType) : null;
data = null;
}
// Evaluate content:template binding to get this content control's declare template(s)
var templates = templateBinding != null && templateBinding.DisplayValue != null ? templateBinding.DisplayValue.Split(' ') : new string[0];
// Join in the ContentTemplateNames value (sys:content-template) and the context's template names
templates = templateNames.Concat(templates).Concat(ownTemplateNames).Distinct().ToArray();
// Find the correct template
var template = FindTemplate(page, isAdapter, referenceType, valueType, isList, templates);
// Output the original template if a matching template could not be found
if (template == null)
{
writer.Write("<!-- A template could not be found matching the specified criteria (TagName={0}, Adapter={1}, Type={2}{3}, IsList={4}, Names='{5}') -->", Tag, isAdapter, referenceType, valueType, isList, string.Join(", ", templates));
Abort(page, templateNames, writer);
return;
}
// Render the template inside a new template context
using (var context = page.BeginContext(data, null))
{
// Render the original content start tag
RenderStartTag(page, writer, attributes => template.Class.Length > 0 ? MergeClassName(attributes, template) : attributes, ifBinding, dataBinding, contentTemplateBinding, templateBinding, new AttributeBinding(new Attribute() { Name = "data-sys-tcindex", Value = context.Id }, null));
// Render the content template
template.Render(page, templates.Where(t => !template.Name.Contains(t)).Concat(template.ContentTemplateNames).ToArray(), writer);
// Render the original content end tag
RenderEndTag(writer);
}
}
protected void RenderStartTag(AjaxPage page, System.IO.TextWriter writer, Func<IEnumerable<AttributeBinding>, IEnumerable<AttributeBinding>> attributeTransform, params AttributeBinding[] bindings)
{
RenderStartTag(page, writer, attributeTransform, false, bindings);
}
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);
}
}
Template FindTemplate(AjaxPage page, bool isAdapter, ModelType entityType, Type valueType, bool isList, string[] names)
{
// Find the appropriate template
var results = page.Templates.OfType<Template>().Reverse().Where(
t =>
{
// First ensure the template tags match
if (t.Tag != Tag)
return false;
// Then see if the template is for adapter bindings
if (isAdapter != t.IsAdapter)
return false;
// Then verify the datatypes
if (!String.IsNullOrEmpty(t.DataType))
{
// Reference
if (entityType != null)
{
// Verify the type matches if it is not the base type
var type = entityType;
while (type != null && type.Name != t.DataType)
type = type.BaseType;
if (type == null)
return false;
}
// Value
else
{
string type = JsonConverter.GetJsonValueType(valueType);
// Use "Array" as the type name for template matching for value types that are IEnumerable and not string.
// JsonConverter is primarily used for serialization of instance data and so the type returned will be
// the declared type of the property. Currently value type arrays are not fully supported but can be
// represented as "Object" for minimal functionality. For template matching we really want "Array" instead,
// since even in the case of custom serialization the value would be deserialized as an Array client-side
// and so if used in template matching the type name would be "Array".
if ((type == null || type == "Object") && typeof(IEnumerable).IsAssignableFrom(valueType))
type = "Array";
if (type == null || type != t.DataType)
return false;
}
}
// Check whether the template is specific to references
if (t.IsReference != null && t.IsReference != (entityType != null))
return false;
// Check whether the template is specific to lists
if (t.IsList != null && t.IsList != isList)
return false;
// Finally, verify that the template names match sufficiently
foreach (var name in t.Name)
{
if (!names.Contains(name))
return false;
}
return true;
});
return results.FirstOrDefault();
}
protected bool TryContentTemplate(AjaxPage page, IEnumerable<string> templateNames, System.IO.TextWriter writer, out AttributeBinding contentTemplateBinding)
{
if (ContentTemplate == null)
{
contentTemplateBinding = null;
return true;
}
contentTemplateBinding = ContentTemplate.Evaluate(page);
return contentTemplateBinding.IsValid && contentTemplateBinding.Value is string;
}
internal override AttributeBinding Evaluate(AjaxPage page)
{
return(binding);
}
Template FindTemplate(AjaxPage page, bool isAdapter, ModelType entityType, Type valueType, bool isList, string[] names)
{
// Find the appropriate template
return(page.Templates.OfType <Template>().Reverse().FirstOrDefault(
t =>
{
// First ensure the template tags match
if (t.Tag != Tag)
{
return false;
}
// Then see if the template is for adapter bindings
if (isAdapter != t.IsAdapter)
{
return false;
}
// Then verify the datatypes
if (!String.IsNullOrEmpty(t.DataType))
{
// Reference
if (entityType != null)
{
// Verify the type matches if it is not the base type
var type = entityType;
while (type != null && type.Name != t.DataType)
{
type = type.BaseType;
}
if (type == null)
{
return false;
}
}
// Value
else
{
string type = JsonConverter.GetJsonValueType(valueType);
// Use "Array" as the type name for template matching for value types that are IEnumerable and not string.
// JsonConverter is primarily used for serialization of instance data and so the type returned will be
// the declared type of the property. Currently value type arrays are not fully supported but can be
// represented as "Object" for minimal functionality. For template matching we really want "Array" instead,
// since even in the case of custom serialization the value would be deserialized as an Array client-side
// and so if used in template matching the type name would be "Array".
if ((type == null || type == "Object") && typeof(IEnumerable).IsAssignableFrom(valueType))
{
type = "Array";
}
if (type == null || type != t.DataType)
{
return false;
}
}
}
// Check whether the template is specific to references
if (t.IsReference != null && t.IsReference != (entityType != null))
{
return false;
}
// Check whether the template is specific to lists
if (t.IsList != null && t.IsList != isList)
{
return false;
}
// Finally, verify that the template names match sufficiently
foreach (var name in t.Name)
{
if (!names.Contains(name))
{
return false;
}
}
return true;
}));
}
internal override AttributeBinding Evaluate(AjaxPage page)
{
// Evaluate the binding path
var result = page.EvaluatePath(Path);
// Invalid result
if (result.Property == null)
result.IsValid = false;
// # syntax
else if (Extension == "#")
{
string format = null;
Parameters.TryGetValue("format", out format);
string value;
result.IsValid = Adapter.TryGetDisplayValue(result.Property, format, result.Value, out value);
result.Value = value;
}
// @ syntax
else if (Extension == "@")
{
if (string.IsNullOrEmpty(Path))
{
if (!(page.Context.DataItem is Adapter))
throw new ApplicationException("No path was specified for the \"@\" markup extension, and the source is not an adapter.");
result.Value = page.Context.DataItem;
}
else
{
var args = ExoWeb.OnBeforeCreateAdapter(this, result.Source, result.Property);
result = new BindingResult()
{
Value = new Adapter(result, args != null ? args.ModifiedParameters ?? Parameters : Parameters),
IsValid = result.IsValid,
Property = result.Property,
Source = result.Source
};
}
}
return new AttributeBinding(Attribute, result);
}
protected void RenderStartTag(AjaxPage page, System.IO.TextWriter writer, params AttributeBinding[] bindings)
{
RenderStartTag(page, writer, null, bindings);
}
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 data source was not specified
if (Data == null)
{
Abort(page, templateNames, writer);
return;
}
// Get the data associated with the content control
var dataBinding = Data.Evaluate(page);
var templateBinding = Template != null?Template.Evaluate(page) : null;
var dataTypeBinding = DataType != null?DataType.Evaluate(page) : null;
// Output the original template if the data binding expression could not be evaluated
if ((!dataBinding.IsValid && (dataTypeBinding == null || !dataTypeBinding.IsValid)) || (templateBinding != null && !templateBinding.IsValid))
{
Abort(page, templateNames, writer);
return;
}
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];
// Just render an empty content element if the data is null
if (dataBinding.IsValid && dataBinding.Value == null)
{
RenderStartTag(page, writer, ifBinding, dataBinding, contentTemplateBinding);
RenderEndTag(writer);
return;
}
// Get the binding data
object data;
bool isAdapter;
ModelType referenceType;
Type valueType;
bool isList;
// Valid binding
if (dataBinding.IsValid)
{
data = dataBinding.Value;
isAdapter = data is Adapter;
object realData = isAdapter ? ((Adapter)data).RawValue : data;
ModelProperty property = dataBinding.Property;
referenceType = realData is ModelInstance ? ((ModelInstance)realData).Type :
property is ModelReferenceProperty ? ((ModelReferenceProperty)property).PropertyType : null;
valueType = realData != null && !(realData is ModelInstance || realData is IEnumerable <ModelInstance>) ? realData.GetType() :
property is ModelValueProperty ? ((ModelValueProperty)property).PropertyType : null;
isList = (property != null && property.IsList) || (realData is IEnumerable && !(realData is string));
}
// Datatype hint only
else
{
var dataType = (string)dataTypeBinding.Value;
isAdapter = Data is Binding.AdapterExtension || dataType == "ExoWeb.View.Adapter";
isList = dataType.EndsWith("[]");
if (isList)
{
dataType = dataType.Substring(0, dataType.Length - 2);
}
valueType = dataType == "String" ? typeof(string) : dataType == "Number" ? typeof(decimal) : dataType == "Date" ? typeof(DateTime) : dataType == "Boolean" ? typeof(bool) : null;
referenceType = valueType == null?ModelContext.Current.GetModelType(dataType) : null;
data = null;
}
// Evaluate content:template binding to get this content control's declare template(s)
var templates = templateBinding != null && templateBinding.DisplayValue != null?templateBinding.DisplayValue.Split(' ') : new string[0];
// Join in the ContentTemplateNames value (sys:content-template) and the context's template names
templates = templateNames.Concat(templates).Concat(ownTemplateNames).Distinct().ToArray();
// Find the correct template
var template = FindTemplate(page, isAdapter, referenceType, valueType, isList, templates);
// Output the original template if a matching template could not be found
if (template == null)
{
writer.Write("<!-- A template could not be found matching the specified criteria (TagName={0}, Adapter={1}, Type={2}{3}, IsList={4}, Names='{5}') -->", Tag, isAdapter, referenceType, valueType, isList, string.Join(", ", templates));
Abort(page, templateNames, writer);
return;
}
// Render the template inside a new template context
using (var context = page.BeginContext(data, null))
{
// Render the original content start tag
RenderStartTag(page, writer, attributes => template.Class.Length > 0 ? MergeClassName(attributes, template) : attributes, ifBinding, dataBinding, contentTemplateBinding, templateBinding, new AttributeBinding(new Attribute()
{
Name = "data-sys-tcindex", Value = context.Id
}, null));
// Render the content template
template.Render(page, templates.Where(t => !template.Name.Contains(t)).Concat(template.ContentTemplateNames).ToArray(), writer);
// Render the original content end tag
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);
}
