begin Titan protocol implementation

src/app/browser/window/tab/item/page/input/response/control.rs

@@ -16,14 +16,16 @@ pub struct Control {
 }
 
 impl Control {
-    // Construct
-    pub fn new(action_send: SimpleAction) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_send: SimpleAction) -> Self {
         // Init components
         let counter = Rc::new(Counter::new());
-        let send = Rc::new(Send::new(action_send));
+        let send = Rc::new(Send::build(action_send));
 
         // Init widget
-        let widget = Rc::new(Widget::new(&counter.widget.label, &send.widget.button));
+        let widget = Rc::new(Widget::build(&counter.widget.label, &send.widget.button));
 
         // Return activated struct
         Self {
@@ -34,10 +36,10 @@ impl Control {
     }
 
     // Actions
-    pub fn update(&self, chars_left: Option<i32>) {
+    pub fn update(&self, bytes_left: Option<usize>) {
         // Update children components
-        self.counter.update(chars_left);
-        self.send.update(match chars_left {
+        self.counter.update(bytes_left);
+        self.send.update(match bytes_left {
             Some(left) => left > 0,
             None => false,
         });

src/app/browser/window/tab/item/page/input/response/control/counter.rs

@@ -23,7 +23,7 @@ impl Counter {
     }
 
     // Actions
-    pub fn update(&self, chars_left: Option<i32>) {
-        self.widget.update(chars_left);
+    pub fn update(&self, bytes_left: Option<usize>) {
+        self.widget.update(bytes_left);
     }
 }

src/app/browser/window/tab/item/page/input/response/control/counter/widget.rs

@@ -19,8 +19,8 @@ impl Widget {
     }
 
     // Actions
-    pub fn update(&self, chars_left: Option<i32>) {
-        match chars_left {
+    pub fn update(&self, bytes_left: Option<usize>) {
+        match bytes_left {
             Some(value) => {
                 // Update color on chars left reached
                 self.label

src/app/browser/window/tab/item/page/input/response/control/send.rs

@@ -9,10 +9,12 @@ pub struct Send {
 }
 
 impl Send {
-    // Construct
-    pub fn new(action_send: SimpleAction) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_send: SimpleAction) -> Self {
         // Init widget
-        let widget = Rc::new(Widget::new(action_send));
+        let widget = Rc::new(Widget::build(action_send));
 
         // Result
         Self { widget }

src/app/browser/window/tab/item/page/input/response/control/send/widget.rs

@@ -9,12 +9,15 @@ pub struct Widget {
 }
 
 impl Widget {
-    // Construct
-    pub fn new(action_send: SimpleAction) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_send: SimpleAction) -> Self {
         // Init main widget
         let button = Button::builder()
             .css_classes(["accent"]) // | `suggested-action`
             .label("Send")
+            .sensitive(false)
             .build();
 
         // Init events

src/app/browser/window/tab/item/page/input/response/control/widget.rs

@@ -7,8 +7,10 @@ pub struct Widget {
 }
 
 impl Widget {
-    // Construct
-    pub fn new(limit: &Label, send: &Button) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(limit: &Label, send: &Button) -> Self {
         // Init main widget
         let g_box = Box::builder()
             .halign(Align::End)

src/app/browser/window/tab/item/page/input/response/form.rs

@@ -10,10 +10,12 @@ pub struct Form {
 }
 
 impl Form {
-    // Construct
-    pub fn new(action_update: SimpleAction) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_update: SimpleAction) -> Self {
         Self {
-            widget: Rc::new(Widget::new(action_update)),
+            widget: Rc::new(Widget::build(action_update)),
         }
     }
 }

src/app/browser/window/tab/item/page/input/response/form/widget.rs

@@ -14,8 +14,10 @@ pub struct Widget {
 }
 
 impl Widget {
-    // Construct
-    pub fn new(action_update: SimpleAction) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(action_update: SimpleAction) -> Self {
         // Init [SourceView](https://gitlab.gnome.org/GNOME/gtksourceview) type buffer
         let buffer = Buffer::builder().build();
 
@@ -44,6 +46,10 @@ impl Widget {
             action_update.activate(None);
         });
 
+        text_view.connect_realize(move |this| {
+            this.grab_focus();
+        });
+
         // Return activated `Self`
         Self { text_view }
     }

src/app/browser/window/tab/item/page/input/response/title.rs

@@ -9,10 +9,12 @@ pub struct Title {
 }
 
 impl Title {
-    // Construct
-    pub fn new(title: Option<&str>) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(title: Option<&str>) -> Self {
         Self {
-            widget: Rc::new(Widget::new(title)),
+            widget: Rc::new(Widget::build(title)),
         }
     }
 }

src/app/browser/window/tab/item/page/input/response/title/widget.rs

@@ -5,8 +5,10 @@ pub struct Widget {
 }
 
 impl Widget {
-    // Construct
-    pub fn new(title: Option<&str>) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(title: Option<&str>) -> Self {
         let label = Label::builder()
             .css_classes(["heading"])
             .halign(Align::Start)

src/app/browser/window/tab/item/page/input/response/widget.rs

@@ -8,8 +8,10 @@ pub struct Widget {
 }
 
 impl Widget {
-    // Construct
-    pub fn new(title: &Label, response: &TextView, control: &Box) -> Self {
+    // Constructors
+
+    /// Build new `Self`
+    pub fn build(title: &Label, response: &TextView, control: &Box) -> Self {
         let g_box = Box::builder()
             .margin_bottom(MARGIN)
             .margin_end(MARGIN)