Upgrade the package (#136)

* Start to add conditional attributes

* Revise the rendering of attributes

The renderer should also take an environment value as attribute value into account.

* Add support for concating environment values with string and vice versa

Sources/HTMLKit/Abstraction/Attributes/BasicAttributes.swift

@@ -223,6 +223,8 @@ public protocol AutoplayAttribute: Attribute {
     /// <tag autoplay />
     /// ```
     func autoplay() -> Self
+
+    func autoplay(_ condition: Bool) -> Self
 }
 
 extension AutoplayAttribute where Self: ContentNode {
@@ -273,6 +275,8 @@ public protocol CheckedAttribute: Attribute {
     /// <tag checked />
     /// ```
     func checked() -> Self
+
+    func checked(_ condition: Bool) -> Self
 }
 
 extension CheckedAttribute where Self: ContentNode {
@@ -625,6 +629,8 @@ public protocol DisabledAttribute: Attribute {
     /// <tag disabled />
     /// ```
     func disabled() -> Self
+
+    func disabled(_ condition: Bool) -> Self
 }
 
 extension DisabledAttribute where Self: ContentNode {
@@ -914,6 +920,8 @@ public protocol HiddenAttribute: Attribute {
     /// <tag hidden />
     /// ```
     func hidden() -> Self
+
+    func hidden(_ condition: Bool) -> Self
 }
 
 extension HiddenAttribute where Self: ContentNode {
@@ -1878,6 +1886,8 @@ public protocol ReadyOnlyAttribute: Attribute {
     /// <tag readonly />
     /// ```
     func readonly() -> Self
+
+    func readonly(_ condition: Bool) -> Self
 }
 
 extension ReadyOnlyAttribute where Self: ContentNode {
@@ -1953,6 +1963,8 @@ public protocol RequiredAttribute: Attribute {
     /// <tag required />
     /// ```
     func required() -> Self
+
+    func required(_ condition: Bool) -> Self
 }
 
 extension RequiredAttribute where Self: ContentNode {
@@ -2278,20 +2290,30 @@ public protocol SourceAttribute: Attribute {
     /// <tag src="" />
     /// ```
     func source(_ value: String) -> Self
+
+    func source(_ value: EnvironmentValue) -> Self
 }
 
 extension SourceAttribute where Self: ContentNode {
 
     internal func mutate(source value: String) -> Self {
         return self.mutate(key: "src", value: value)
     }
+
+    internal func mutate(source value: EnvironmentValue) -> Self {
+        return self.mutate(key: "src", value: value)
+    }
 }
 
 extension SourceAttribute where Self: EmptyNode {
 
     internal func mutate(source value: String) -> Self {
         return self.mutate(key: "src", value: value)
     }
+
+    internal func mutate(source value: EnvironmentValue) -> Self {
+        return self.mutate(key: "src", value: value)
+    }
 }
 
 /// The protocol provides the element with the start handler.

Sources/HTMLKit/Abstraction/Elements/BasicElements.swift

@@ -114,6 +114,15 @@ extension Html: GlobalAttributes, GlobalEventAttributes {
     public func hidden() -> Html {
         return mutate(hidden: "hidden")
     }
+
+    public func hidden(_ condition: Bool) -> Html {
+
+        if condition {
+            return mutate(hidden: "hidden")
+        }
+
+        return self
+    }
 
     public func inputMode(_ value: String) -> Html {
         return mutate(inputmode: value)