Make many functions const

The point is to set up repeated components or boilerplate before their
use sites.

The majority of these make sense as `const`. However, some functions
such as those regarding state may not make sense as `const`.

web/src/widget/button.rs

@@ -113,8 +113,8 @@ impl State {
     /// Creates a new [`State`].
     ///
     /// [`State`]: struct.State.html
-    pub fn new() -> State {
-        State::default()
+    pub const fn new() -> State {
+        State
     }
 }
 

web/src/widget/column.rs

@@ -24,7 +24,7 @@ impl<'a, Message> Column<'a, Message> {
     /// Creates an empty [`Column`].
     ///
     /// [`Column`]: struct.Column.html
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Column {
             spacing: 0,
             padding: 0,
@@ -42,7 +42,7 @@ impl<'a, Message> Column<'a, Message> {
     /// Custom margins per element do not exist in Iced. You should use this
     /// method instead! While less flexible, it helps you keep spacing between
     /// elements consistent.
-    pub fn spacing(mut self, units: u16) -> Self {
+    pub const fn spacing(mut self, units: u16) -> Self {
         self.spacing = units;
         self
     }
@@ -50,7 +50,7 @@ impl<'a, Message> Column<'a, Message> {
     /// Sets the padding of the [`Column`].
     ///
     /// [`Column`]: struct.Column.html
-    pub fn padding(mut self, units: u16) -> Self {
+    pub const fn padding(mut self, units: u16) -> Self {
         self.padding = units;
         self
     }
@@ -58,7 +58,7 @@ impl<'a, Message> Column<'a, Message> {
     /// Sets the width of the [`Column`].
     ///
     /// [`Column`]: struct.Column.html
-    pub fn width(mut self, width: Length) -> Self {
+    pub const fn width(mut self, width: Length) -> Self {
         self.width = width;
         self
     }
@@ -66,7 +66,7 @@ impl<'a, Message> Column<'a, Message> {
     /// Sets the height of the [`Column`].
     ///
     /// [`Column`]: struct.Column.html
-    pub fn height(mut self, height: Length) -> Self {
+    pub const fn height(mut self, height: Length) -> Self {
         self.height = height;
         self
     }
@@ -74,7 +74,7 @@ impl<'a, Message> Column<'a, Message> {
     /// Sets the maximum width of the [`Column`].
     ///
     /// [`Column`]: struct.Column.html
-    pub fn max_width(mut self, max_width: u32) -> Self {
+    pub const fn max_width(mut self, max_width: u32) -> Self {
         self.max_width = max_width;
         self
     }
@@ -82,7 +82,7 @@ impl<'a, Message> Column<'a, Message> {
     /// Sets the maximum height of the [`Column`] in pixels.
     ///
     /// [`Column`]: struct.Column.html
-    pub fn max_height(mut self, max_height: u32) -> Self {
+    pub const fn max_height(mut self, max_height: u32) -> Self {
         self.max_height = max_height;
         self
     }
@@ -90,7 +90,7 @@ impl<'a, Message> Column<'a, Message> {
     /// Sets the horizontal alignment of the contents of the [`Column`] .
     ///
     /// [`Column`]: struct.Column.html
-    pub fn align_items(mut self, align: Align) -> Self {
+    pub const fn align_items(mut self, align: Align) -> Self {
         self.align_items = align;
         self
     }

web/src/widget/row.rs

@@ -24,7 +24,7 @@ impl<'a, Message> Row<'a, Message> {
     /// Creates an empty [`Row`].
     ///
     /// [`Row`]: struct.Row.html
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Row {
             spacing: 0,
             padding: 0,
@@ -42,7 +42,7 @@ impl<'a, Message> Row<'a, Message> {
     /// Custom margins per element do not exist in Iced. You should use this
     /// method instead! While less flexible, it helps you keep spacing between
     /// elements consistent.
-    pub fn spacing(mut self, units: u16) -> Self {
+    pub const fn spacing(mut self, units: u16) -> Self {
         self.spacing = units;
         self
     }
@@ -50,7 +50,7 @@ impl<'a, Message> Row<'a, Message> {
     /// Sets the padding of the [`Row`].
     ///
     /// [`Row`]: struct.Row.html
-    pub fn padding(mut self, units: u16) -> Self {
+    pub const fn padding(mut self, units: u16) -> Self {
         self.padding = units;
         self
     }
@@ -58,7 +58,7 @@ impl<'a, Message> Row<'a, Message> {
     /// Sets the width of the [`Row`].
     ///
     /// [`Row`]: struct.Row.html
-    pub fn width(mut self, width: Length) -> Self {
+    pub const fn width(mut self, width: Length) -> Self {
         self.width = width;
         self
     }
@@ -66,7 +66,7 @@ impl<'a, Message> Row<'a, Message> {
     /// Sets the height of the [`Row`].
     ///
     /// [`Row`]: struct.Row.html
-    pub fn height(mut self, height: Length) -> Self {
+    pub const fn height(mut self, height: Length) -> Self {
         self.height = height;
         self
     }
@@ -74,7 +74,7 @@ impl<'a, Message> Row<'a, Message> {
     /// Sets the maximum width of the [`Row`].
     ///
     /// [`Row`]: struct.Row.html
-    pub fn max_width(mut self, max_width: u32) -> Self {
+    pub const fn max_width(mut self, max_width: u32) -> Self {
         self.max_width = max_width;
         self
     }
@@ -82,7 +82,7 @@ impl<'a, Message> Row<'a, Message> {
     /// Sets the maximum height of the [`Row`].
     ///
     /// [`Row`]: struct.Row.html
-    pub fn max_height(mut self, max_height: u32) -> Self {
+    pub const fn max_height(mut self, max_height: u32) -> Self {
         self.max_height = max_height;
         self
     }
@@ -90,7 +90,7 @@ impl<'a, Message> Row<'a, Message> {
     /// Sets the vertical alignment of the contents of the [`Row`] .
     ///
     /// [`Row`]: struct.Row.html
-    pub fn align_items(mut self, align: Align) -> Self {
+    pub const fn align_items(mut self, align: Align) -> Self {
         self.align_items = align;
         self
     }

web/src/widget/scrollable.rs

@@ -151,7 +151,7 @@ impl State {
     /// Creates a new [`State`] with the scrollbar located at the top.
     ///
     /// [`State`]: struct.State.html
-    pub fn new() -> Self {
-        State::default()
+    pub const fn new() -> Self {
+        State
     }
 }

web/src/widget/slider.rs

@@ -147,7 +147,7 @@ impl State {
     /// Creates a new [`State`].
     ///
     /// [`State`]: struct.State.html
-    pub fn new() -> Self {
+    pub const fn new() -> Self {
         Self
     }
 }

web/src/widget/text_input.rs

@@ -191,7 +191,7 @@ impl State {
     /// Creates a new [`State`], representing an unfocused [`TextInput`].
     ///
     /// [`State`]: struct.State.html
-    pub fn new() -> Self {
-        Self::default()
+    pub const fn new() -> Self {
+        Self
     }
 }