servo: Put 'use harfbuzz' in text::shaper, not at the crate level

Source-Repo: https://github.com/servo/servo
Source-Revision: 61a615fb4d371e83ae007f03de4824eda837ffea

servo/src/servo/servo.rc

@@ -10,7 +10,6 @@ use std;
 use sdl;
 use azure;
 use js;
-use harfbuzz;
 use stb_image;
 
 mod dom {

servo/src/servo/text/glyph.rs

@@ -1,19 +1,12 @@
-import gfx::geom::{au, point, px_to_au};
+import gfx::geom::{au, point};
 
 #[doc="The position of a glyph on the screen."]
 class glyph_pos {
     let advance: point<au>;
     let offset: point<au>;
-
-    new(hb_pos: harfbuzz::hb_glyph_position_t) {
-        self.advance = {
-            x: px_to_au(hb_pos.x_advance as int),
-            y: px_to_au(hb_pos.y_advance as int)
-        };
-        self.offset = {
-            x: px_to_au(hb_pos.x_offset as int),
-            y: px_to_au(hb_pos.y_offset as int)
-        };
+    new(advance: point<au>, offset: point<au>) {
+        self.advance = advance;
+        self.offset = offset;
     }
 }
 

servo/src/servo/text/shaper.rs

@@ -1,14 +1,19 @@
+use harfbuzz;
+
+export shape_text;
+
 import libc::types::common::c99::int32_t;
 import libc::{c_uint, c_int, c_void};
 import font::font;
 import glyph::{glyph, glyph_pos};
 import ptr::{null, addr_of, offset};
+import gfx::geom::{point, px_to_au};
 
 import unsafe::reinterpret_cast;
 import harfbuzz::{HB_MEMORY_MODE_READONLY,
                   HB_DIRECTION_LTR};
 import harfbuzz::{hb_blob_t, hb_face_t, hb_font_t, hb_buffer_t,
-                  hb_codepoint_t, hb_bool_t};
+                  hb_codepoint_t, hb_bool_t, hb_glyph_position_t};
 import harfbuzz::bindgen::{hb_blob_create, hb_blob_destroy,
                            hb_face_create, hb_face_destroy,
                            hb_font_create, hb_font_destroy,
@@ -42,7 +47,8 @@ fn shape_text(_font: &font, text: str) -> [glyph] {
             var: 0i32
         };
 
-        vec::push(glyphs, glyph(ch as uint, glyph_pos(hb_pos)));
+        let pos = hb_glyph_pos_to_servo_glyph_pos(hb_pos);
+        vec::push(glyphs, glyph(ch as uint, pos));
         cur_x += 10u;
     };
 
@@ -122,6 +128,13 @@ crust fn glyph_func(_font: *hb_font_t,
     ret true as hb_bool_t;
 }
 
+fn hb_glyph_pos_to_servo_glyph_pos(hb_pos: hb_glyph_position_t) -> glyph_pos {
+    glyph_pos(point(px_to_au(hb_pos.x_advance as int),
+                    px_to_au(hb_pos.y_advance as int)),
+              point(px_to_au(hb_pos.x_offset as int),
+                    px_to_au(hb_pos.y_offset as int)))
+}
+
 #[test]
 fn test_shape_basic() {
     let font = font::create();