Introduce flex layouting 🎈

1 files changed, 60 insertions, 0 deletions

diff --git a/src/style.rs b/src/style.rs
new file mode 100644
index 00000000..c4e92ec9
--- /dev/null
+++ b/src/style.rs
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+//! Styles for layouting.
+
+use crate::font::FontFamily;
+use crate::size::{Size, Size2D, SizeBox};
+
+
+/// Default styles for text.
+#[derive(Debug, Clone)]
+pub struct TextStyle {
+    /// A fallback list of font families to use.
+    pub font_families: Vec<FontFamily>,
+    /// The font size.
+    pub font_size: f32,
+    /// The line spacing (as a multiple of the font size).
+    pub line_spacing: f32,
+    /// The paragraphs spacing (as a multiple of the line spacing).
+    pub paragraph_spacing: f32,
+}
+
+impl Default for TextStyle {
+    fn default() -> TextStyle {
+        use FontFamily::*;
+        TextStyle {
+            // Default font family, font size and line spacing.
+            font_families: vec![SansSerif, Serif, Monospace],
+            font_size: 11.0,
+            line_spacing: 1.25,
+            paragraph_spacing: 1.5,
+        }
+    }
+}
+
+/// Default styles for pages.
+#[derive(Debug, Clone)]
+pub struct PageStyle {
+    /// Width and height of the page.
+    pub dimensions: Size2D,
+    /// The amount of white space on each side.
+    pub margins: SizeBox,
+}
+
+impl Default for PageStyle {
+    fn default() -> PageStyle {
+        PageStyle {
+            // A4 paper.
+            dimensions: Size2D {
+                x: Size::from_mm(210.0),
+                y: Size::from_mm(297.0),
+            },
+
+            // All the same margins.
+            margins: SizeBox {
+                left: Size::from_cm(3.0),
+                top: Size::from_cm(3.0),
+                right: Size::from_cm(3.0),
+                bottom: Size::from_cm(3.0),
+            },
+        }
+    }
+}