More consistent library code and functions 🎄

1 files changed, 70 insertions, 3 deletions

diff --git a/src/style.rs b/src/style.rs
index 616619e1..1dcae0da 100644
--- a/src/style.rs
+++ b/src/style.rs
@@ -4,6 +4,7 @@ use toddle::query::FontClass;
 use FontClass::*;
 
 use crate::size::{Size, Size2D, SizeBox};
+use crate::syntax::ParseResult;
 
 /// Defines properties of pages and text.
 #[derive(Debug, Default, Clone)]
@@ -20,8 +21,10 @@ pub struct TextStyle {
     /// The fallback classes from which the font needs to match the
     /// leftmost possible one.
     pub fallback: Vec<FontClass>,
-    /// The font size.
-    pub font_size: Size,
+    /// The base font size.
+    pub base_font_size: Size,
+    /// The font scale to apply on the base font size.
+    pub font_scale: f32,
     /// The word spacing (as a multiple of the font size).
     pub word_spacing: f32,
     /// The line spacing (as a multiple of the font size).
@@ -31,6 +34,11 @@ pub struct TextStyle {
 }
 
 impl TextStyle {
+    /// The scaled font size.
+    pub fn font_size(&self) -> Size {
+        self.base_font_size * self.font_scale
+    }
+
     /// Toggle a class.
     ///
     /// If the class was one of _italic_ or _bold_, then:
@@ -73,7 +81,8 @@ impl Default for TextStyle {
         TextStyle {
             classes: vec![Regular],
             fallback: vec![Serif],
-            font_size: Size::pt(11.0),
+            base_font_size: Size::pt(11.0),
+            font_scale: 1.0,
             word_spacing: 0.25,
             line_spacing: 1.2,
             paragraph_spacing: 1.5,
@@ -109,3 +118,61 @@ impl Default for PageStyle {
         }
     }
 }
+
+/// The size of a page with the given name.
+pub fn parse_paper_name(paper: &str) -> ParseResult<Size2D> {
+    Ok(match paper {
+        "A0" | "a0" => PAPER_A0,
+        "A1" | "a1" => PAPER_A1,
+        "A2" | "a2" => PAPER_A2,
+        "A3" | "a3" => PAPER_A3,
+        "A4" | "a4" => PAPER_A4,
+        "A5" | "a5" => PAPER_A5,
+        "A6" | "a6" => PAPER_A6,
+        "A7" | "a7" => PAPER_A7,
+        "A8" | "a8" => PAPER_A8,
+        "A9" | "a9" => PAPER_A9,
+        "A10" | "a10" => PAPER_A10,
+        "A11" | "a11" => PAPER_A11,
+        "Letter" | "letter" => PAPER_LETTER,
+        "Legal" | "legal" => PAPER_LEGAL,
+        "Tabloid" | "tabloid" => PAPER_TABLOID,
+        "Ledger" | "ledger" => PAPER_LEDGER,
+        "Junior-Legal" | "junior-legal" => PAPER_JUNIOR_LEGAL,
+        "Half-Letter" | "half-letter" => PAPER_HALF_LETTER,
+        "Government-Letter" | "government-letter" => PAPER_GOVERNMENT_LETTER,
+
+        _ => error!("unknown paper size: `{}`", paper),
+    })
+}
+
+macro_rules! paper {
+    ($var:ident: $width:expr, $height: expr) => {
+        /// The size of the paper that's in the name.
+        pub const $var: Size2D = Size2D {
+            x: Size { points: 2.83465 * $width },
+            y: Size { points: 2.83465 * $height },
+        };
+    };
+}
+
+// Common paper sizes in mm.
+paper!(PAPER_A0:  841.0, 1189.0);
+paper!(PAPER_A1:  594.0, 841.0);
+paper!(PAPER_A2:  420.0, 594.0);
+paper!(PAPER_A3:  297.0, 420.0);
+paper!(PAPER_A4:  210.0, 297.0);
+paper!(PAPER_A5:  148.0, 210.0);
+paper!(PAPER_A6:  105.0, 148.0);
+paper!(PAPER_A7:  74.0,  105.0);
+paper!(PAPER_A8:  52.0,  74.0);
+paper!(PAPER_A9:  37.0,  52.0);
+paper!(PAPER_A10: 26.0,  37.0);
+paper!(PAPER_A11: 18.0,  26.0);
+paper!(PAPER_LETTER:            216.0, 279.0);
+paper!(PAPER_LEGAL:             216.0, 356.0);
+paper!(PAPER_TABLOID:           279.0, 432.0);
+paper!(PAPER_LEDGER:            432.0, 279.0);
+paper!(PAPER_JUNIOR_LEGAL:      127.0, 203.0);
+paper!(PAPER_HALF_LETTER:       140.0, 216.0);
+paper!(PAPER_GOVERNMENT_LETTER: 203.0, 267.0);