Add a text shaper. No impl yet

src/servo/servo.rc

@@ -62,6 +62,7 @@ mod text {
     mod glyph;
     mod text_run;
     mod font;
+    mod shaper;
 }
 
 mod util {

src/servo/text/shaper.rs

@@ -0,0 +1,28 @@
+import libc::types::common::c99::int32_t;
+import font::font;
+import glyph::{glyph, glyph_pos};
+
+#[doc = "
+Calculate the layout metrics associated with a some given text
+when rendered in a specific font.
+"]
+fn shape_text(_font: &font, text: str) -> [glyph] {
+    let mut glyphs = [];
+    let mut cur_x = 0u;
+    for text.each_char {
+        |ch|
+        // TODO: Use HarfBuzz!
+        let hb_pos = {
+            x_advance: 10 as int32_t,
+            y_advance: 0 as int32_t,
+            x_offset: cur_x as int32_t,
+            y_offset: 0 as int32_t,
+            var: 0
+        };
+
+        vec::push(glyphs, glyph(ch as uint, glyph_pos(hb_pos)));
+        cur_x += 10u;
+    };
+
+    ret glyphs;
+}

src/servo/text/text_run.rs

@@ -1,6 +1,6 @@
 import libc::{c_void};
-import libc::types::common::c99::int32_t;
+import text::glyph::glyph;
-import text::glyph::{glyph, glyph_pos};
+import shaper::shape_text;
 
 #[doc="A single, unbroken line of text."]
 class text_run {
@@ -17,24 +17,8 @@ class text_run {
         line break positions.
     "]
     fn shape() {
-        let mut glyphs = [];
+        let font = font::create();
-        let mut cur_x = 0u;
+        self.glyphs = some(shape_text(&font, self.text));
-        for self.text.each_char {
-            |ch|
-            // TODO: Use HarfBuzz!
-            let hb_pos = {
-                x_advance: 10 as int32_t,
-                y_advance: 0 as int32_t,
-                x_offset: cur_x as int32_t,
-                y_offset: 0 as int32_t,
-                var: 0
-            };
-
-            vec::push(glyphs, glyph(ch as uint, glyph_pos(hb_pos)));
-            cur_x += 10u;
-        };
-
-        self.glyphs = some(/* move */ glyphs);
     }
 }