Merge pull request #1578 from iced-rs/svg-styling

Svg styling

3 files changed, 63 insertions, 0 deletions

diff --git a/style/src/lib.rs b/style/src/lib.rs
index 3242602c..59eb1eb8 100644
--- a/style/src/lib.rs
+++ b/style/src/lib.rs
@@ -32,6 +32,7 @@ pub mod radio;
 pub mod rule;
 pub mod scrollable;
 pub mod slider;
+pub mod svg;
 pub mod text;
 pub mod text_input;
 pub mod theme;
diff --git a/style/src/svg.rs b/style/src/svg.rs
new file mode 100644
index 00000000..9378c1a7
--- /dev/null
+++ b/style/src/svg.rs
@@ -0,0 +1,23 @@
+//! Change the appearance of a svg.
+
+use iced_core::Color;
+
+/// The appearance of an SVG.
+#[derive(Debug, Default, Clone, Copy)]
+pub struct Appearance {
+    /// The [`Color`] filter of an SVG.
+    ///
+    /// Useful for coloring a symbolic icon.
+    ///
+    /// `None` keeps the original color.
+    pub color: Option<Color>,
+}
+
+/// The stylesheet of a svg.
+pub trait StyleSheet {
+    /// The supported style of the [`StyleSheet`].
+    type Style: Default;
+
+    /// Produces the [`Appearance`] of the svg.
+    fn appearance(&self, style: &Self::Style) -> Appearance;
+}
diff --git a/style/src/theme.rs b/style/src/theme.rs
index dde0df5d..271d9a29 100644
--- a/style/src/theme.rs
+++ b/style/src/theme.rs
@@ -16,6 +16,7 @@ use crate::radio;
 use crate::rule;
 use crate::scrollable;
 use crate::slider;
+use crate::svg;
 use crate::text;
 use crate::text_input;
 use crate::toggler;
@@ -823,6 +824,44 @@ impl rule::StyleSheet for fn(&Theme) -> rule::Appearance {
     }
 }
 
+/**
+ * Svg
+ */
+#[derive(Default)]
+pub enum Svg {
+    /// No filtering to the rendered SVG.
+    #[default]
+    Default,
+    /// A custom style.
+    Custom(Box<dyn svg::StyleSheet<Style = Theme>>),
+}
+
+impl Svg {
+    /// Creates a custom [`Svg`] style.
+    pub fn custom_fn(f: fn(&Theme) -> svg::Appearance) -> Self {
+        Self::Custom(Box::new(f))
+    }
+}
+
+impl svg::StyleSheet for Theme {
+    type Style = Svg;
+
+    fn appearance(&self, style: &Self::Style) -> svg::Appearance {
+        match style {
+            Svg::Default => Default::default(),
+            Svg::Custom(custom) => custom.appearance(self),
+        }
+    }
+}
+
+impl svg::StyleSheet for fn(&Theme) -> svg::Appearance {
+    type Style = Theme;
+
+    fn appearance(&self, style: &Self::Style) -> svg::Appearance {
+        (self)(style)
+    }
+}
+
 /// The style of a scrollable.
 #[derive(Default)]
 pub enum Scrollable {