Create font matchers and native equivalents. Add in a dummy font cache. Untangle some test font stuff.

src/servo/gfx/render_task.rs

@@ -15,6 +15,7 @@ use render_context::RenderContext;
 use render_layers::render_layers;
 use std::cell::Cell;
 use text::font_cache::FontCache;
+use text::font_matcher::FontMatcher;
 
 pub enum Msg {
     RenderMsg(RenderLayer),
@@ -35,7 +36,7 @@ pub fn RenderTask<C: Compositor Send>(compositor: C) -> RenderTask {
             port: po,
             compositor: move compositor,
             mut layer_buffer_set_port: Cell(move layer_buffer_set_port),
-            font_cache: FontCache(),
+            font_cache: @FontCache::new(@FontMatcher::new()),
         }.start();
     }
 }

src/servo/layout/layout_task.rs

@@ -26,6 +26,7 @@ use render_task::RenderTask;
 use resource::image_cache_task::{ImageCacheTask, ImageResponseMsg};
 use resource::local_image_cache::LocalImageCache;
 use servo_text::font_cache::FontCache;
+use servo_text::font_matcher::FontMatcher;
 use std::arc::ARC;
 use std::net::url::Url;
 use core::util::replace;
@@ -89,7 +90,7 @@ fn Layout(render_task: RenderTask,
         image_cache_task: image_cache_task.clone(),
         local_image_cache: @LocalImageCache(move image_cache_task),
         from_content: from_content,
-        font_cache: FontCache(),
+        font_cache: @FontCache::new(@FontMatcher::new()),
         layout_refs: DVec()
     }
 }

src/servo/servo.rc

@@ -103,13 +103,16 @@ pub mod platform {
 pub mod text {
     pub mod font;
     pub mod font_cache;
+    pub mod font_matcher;
     pub mod glyph;
-    pub mod native_font;
-    pub mod shaper;
     pub mod text_run;
     pub mod util;
 
     // platform and library-specific implementations.
+    pub mod native_font;
+    pub mod native_font_matcher;
+    pub mod shaper;
+
     pub mod harfbuzz {
         pub mod shaper;
     }
@@ -117,11 +120,13 @@ pub mod text {
     #[cfg(target_os = "macos")]
     pub mod quartz {
         pub mod native_font;
+        pub mod native_font_matcher;
     }
 
     #[cfg(target_os = "linux")]
     pub mod freetype {
         pub mod native_font;
+        pub mod native_font_matcher;
     }
 }
 

src/servo/text/font.rs

@@ -78,9 +78,6 @@ A font handle. Layout can use this to calculate glyph metrics
 and the renderer can use it to render text.
 */
 struct Font {
-    // TODO: is this actually needed? -bjb
-    // A back reference to keep the library alive
-    priv lib: @FontCache,
     priv fontbuf: @~[u8],
     priv native_font: NativeFont,
     priv mut azure_font: Option<AzScaledFontRef>,
@@ -96,11 +93,10 @@ struct Font {
 
 impl Font {
     // TODO: who should own fontbuf?
-    static fn new(lib: @FontCache, fontbuf: @~[u8], native_font: NativeFont, style: FontStyle) -> Font {
+    static fn new(fontbuf: @~[u8], native_font: NativeFont, style: FontStyle) -> Font {
         let metrics = native_font.get_metrics();
 
         Font {
-            lib: lib,
             fontbuf : fontbuf,
             native_font : move native_font,
             azure_font: None,
@@ -340,12 +336,6 @@ pub impl Font : FontMethods {
     }
 }
 
-const TEST_FONT: [u8 * 33004] = #include_bin("JosefinSans-SemiBold.ttf");
-
-fn test_font_bin() -> ~[u8] {
-    return vec::from_fn(33004, |i| TEST_FONT[i]);
-}
-
 fn should_destruct_on_fail_without_leaking() {
     #[test];
     #[should_fail];

src/servo/text/font_cache.rs

@@ -1,96 +1,34 @@
-use font::{Font,
+use font::{Font, FontStyle, FontWeight300};
-           FontStyle,
+use font_matcher::FontMatcher;
-           FontWeight300,
+// Dummy font cache.
-           test_font_bin};
-use native_font::NativeFont;
 
 struct FontCache {
-    native_lib: native::NativeFontCache,
+    matcher: @FontMatcher,
-    mut cached_font: Option<@Font>,
+    mut cached_font: Option<@Font>
-
-    drop {
-        native::destroy_native_lib(&self.native_lib);
-    }
 }
 
 impl FontCache {
-    fn get_font(@self) -> @Font {
+    static pub fn new(matcher: @FontMatcher) -> FontCache {
-        match self.cached_font {
+        FontCache { 
-            Some(font) => font,
+            matcher: matcher,
-            None => match create_font(self, &self.native_lib) {
-                Ok(font) => {
-                    self.cached_font = Some(font);
-                    font
-                }
-                Err(*) => /* FIXME */ fail
-            }
-        }
-    }
-
-    fn get_test_font(@self) -> @Font {
-        self.get_font()
-    }
-}
-
-fn FontCache() -> @FontCache {
-    @FontCache {
-        native_lib: native::create_native_lib(),
             cached_font: None
         }
     }
     
-fn create_font(lib: @FontCache, native_lib: &native::NativeFontCache) -> Result<@Font, ()> {
+    pub fn get_test_font(@self) -> @Font {
-    let font_bin = @test_font_bin();
         let dummy_style = FontStyle {
             pt_size: 40f,
             weight: FontWeight300,
             italic: false,
             oblique: false
         };
-    let native_font = NativeFont::new(native_lib, font_bin, dummy_style.pt_size);
-    let native_font = if native_font.is_ok() {
-        result::unwrap(move native_font)
-    } else {
-        return Err(native_font.get_err());
-    };
 
-    return Ok(@Font::new(lib, font_bin, move native_font, move dummy_style));
+        return match self.cached_font {
-}
+            Some(font) => font,
-
+            None => match self.matcher.get_font(&dummy_style) {
-#[cfg(target_os = "linux")]
+                Ok(font) => { self.cached_font = Some(font); font }
-pub mod native {
+                Err(*) => /* FIXME */ fail
-    extern mod freetype;
-
-    use ptr::{null, addr_of};
-    use freetype::{FT_Library, FT_Error};
-    use freetype::bindgen::{FT_Init_FreeType, FT_Done_FreeType};
-
-    pub type NativeFontCache = FT_Library;
-
-    pub fn create_native_lib() -> NativeFontCache {
-        let lib: FT_Library = null();
-        let res = FT_Init_FreeType(addr_of(&lib));
-        // FIXME: error handling
-        assert res == 0 as FT_Error;
-        return lib;
-    }
-
-    pub fn destroy_native_lib(native_lib: &NativeFontCache) {
-        assert native_lib.is_not_null();
-        FT_Done_FreeType(*native_lib);
             }
         }
-
-#[cfg(target_os = "macos")]
-pub mod native {
-    pub type NativeFontCache = ();
-
-    pub fn create_native_lib() -> NativeFontCache { () }
-    pub fn destroy_native_lib(_native_lib: &NativeFontCache) { }
     }
-
-#[test]
-pub fn should_get_fonts() {
-    let lib = FontCache();
-    lib.get_font();
 }

src/servo/text/font_matcher.rs

@@ -0,0 +1,43 @@
+use font::{Font, FontStyle};
+use native_font::NativeFont;
+use native_font_matcher::NativeFontMatcher;
+
+// TODO(Issue #164): delete, and get default font from NativeFontMatcher
+const TEST_FONT: [u8 * 33004] = #include_bin("JosefinSans-SemiBold.ttf");
+
+fn test_font_bin() -> ~[u8] {
+    return vec::from_fn(33004, |i| TEST_FONT[i]);
+}
+
+struct FontMatcher {
+    native_matcher: NativeFontMatcher,
+    // TODO(Issue #165): move into FontCache
+    mut cached_font: Option<@Font>,
+}
+
+impl FontMatcher {
+    static pub fn new() -> FontMatcher {
+        FontMatcher {
+            native_matcher: NativeFontMatcher::new(),
+            cached_font: None
+        }
+    }
+
+    // TODO: maybe FontStyle should be canonicalized when used in FontCache?
+    // TODO(Issue #166): move this to FontCache or something? At the least, use it there.
+    priv fn create_font(style: &FontStyle) -> Result<@Font, ()> {
+        let font_bin = @test_font_bin();
+        let native_font = NativeFont::new(&self.native_matcher, font_bin, style.pt_size);
+        let native_font = if native_font.is_ok() {
+            result::unwrap(move native_font)
+        } else {
+            return Err(native_font.get_err());
+        };
+
+        return Ok(@Font::new(font_bin, move native_font, copy *style));
+    }
+
+    pub fn get_font(@self, style: &FontStyle) -> Result<@Font, ()> {
+        self.create_font(style)
+    }
+}

src/servo/text/freetype/native_font.rs

@@ -1,6 +1,7 @@
 extern mod freetype;
 
 use font::{FontMetrics, FractionalPixel};
+use native_font_matcher::FreeTypeNativeFontMatcher;
 
 use gfx::geometry;
 use gfx::geometry::Au;
@@ -44,11 +45,13 @@ pub struct FreeTypeNativeFont {
 }
 
 pub impl FreeTypeNativeFont {
-    static pub fn new(lib: &FT_Library, buf: @~[u8], pt_size: float) -> Result<FreeTypeNativeFont, ()> {
+    static pub fn new(matcher: &FreeTypeNativeFontMatcher,
+                      buf: @~[u8], pt_size: float) -> Result<FreeTypeNativeFont, ()> {
+        let lib = matcher.ft_lib;
         assert lib.is_not_null();
         let face: FT_Face = null();
         return vec_as_buf(*buf, |cbuf, _len| {
-            if FT_New_Memory_Face(*lib, cbuf, (*buf).len() as FT_Long,
+            if FT_New_Memory_Face(lib, cbuf, (*buf).len() as FT_Long,
                                   0 as FT_Long, addr_of(&face)).succeeded() {
                 let res = FT_Set_Char_Size(face, // the face
                                            float_to_fixed_ft(pt_size) as FT_F26Dot6, // char width

src/servo/text/freetype/native_font_matcher.rs

@@ -0,0 +1,33 @@
+extern mod freetype;
+
+use freetype::{
+    FT_Error,
+    FT_Library,
+};
+use freetype::bindgen::{
+    FT_Init_FreeType, 
+    FT_Done_FreeType
+};
+
+
+pub struct FreeTypeNativeFontMatcher {
+    ft_lib: FT_Library,
+
+    drop {
+        assert self.ft_lib.is_not_null();
+        FT_Done_FreeType(self.ft_lib);
+    }
+}
+
+pub impl FreeTypeNativeFontMatcher {
+    static pub fn new() -> FreeTypeNativeFontMatcher {
+        let lib: FT_Library = ptr::null();
+        let res = FT_Init_FreeType(ptr::addr_of(&lib));
+        // FIXME: error handling
+        assert res == 0 as FT_Error;
+
+        FreeTypeNativeFontMatcher { 
+            ft_lib: lib,
+        }
+    }
+}

src/servo/text/native_font.rs

@@ -5,7 +5,7 @@ needed by the text shaper as well as access to the underlying
 font resources needed by the graphics layer to draw glyphs.
 */
 
-use font_cache::native::NativeFontCache;
+use native_font_matcher::NativeFontMatcher;
 
 #[cfg(target_os = "macos")]
 pub type NativeFont/& = quartz::native_font::QuartzNativeFont;
@@ -22,14 +22,14 @@ pub type NativeFont/& = freetype::native_font::FreeTypeNativeFont;
 // to conditionally define the entire impl.
 #[cfg(target_os = "macos")]
 impl NativeFont {
-    static pub fn new(native_lib: &NativeFontCache, buf: @~[u8], pt_size: float) -> Result<NativeFont, ()> {
+    static pub fn new(native_lib: &NativeFontMatcher, buf: @~[u8], pt_size: float) -> Result<NativeFont, ()> {
         quartz::native_font::QuartzNativeFont::new(native_lib, buf, pt_size)
     }
 }
 
 #[cfg(target_os = "linux")]
 impl NativeFont {
-    static pub fn new(native_lib: &NativeFontCache, buf: @~[u8], pt_size: float) -> Result<NativeFont, ()> {
+    static pub fn new(native_lib: &NativeFontMatcher, buf: @~[u8], pt_size: float) -> Result<NativeFont, ()> {
         freetype::native_font::FreeTypeNativeFont::new(native_lib, buf, pt_size)
     }
 }

src/servo/text/native_font_matcher.rs

@@ -0,0 +1,25 @@
+// TODO(Issue #163): this is a workaround for static methods and
+// typedefs not working well together. It should be removed.
+
+// TODO(Rust #1723): #cfg doesn't work for impl methods, so we have
+// to conditionally define the entire impl.
+
+#[cfg(target_os = "macos")]
+type NativeFontMatcher/& = quartz::native_font_matcher::QuartzNativeFontMatcher;
+
+#[cfg(target_os = "linux")]
+type NativeFontMatcher/& = freetype::native_font_matcher::FreeTypeNativeFontMatcher;
+
+#[cfg(target_os = "macos")]
+pub impl NativeFontMatcher {
+    static pub fn new() -> NativeFontMatcher {
+        quartz::native_font_matcher::QuartzNativeFontMatcher::new()
+    }
+}
+
+#[cfg(target_os = "linux")]
+pub impl NativeFontMatcher {
+    static pub fn new() -> NativeFontMatcher {
+        freetype::native_font_matcher::FreeTypeNativeFontMatcher::new()
+    }
+}

src/servo/text/quartz/native_font.rs

@@ -3,7 +3,7 @@ extern mod core_graphics;
 extern mod core_text;
 
 use font::{FontMetrics, FractionalPixel};
-use font_cache::native::NativeFontCache;
+use native_font_matcher::QuartzNativeFontMatcher;
 
 use au = gfx::geometry;
 use cast::transmute;
@@ -68,7 +68,7 @@ pub struct QuartzNativeFont {
 }
 
 pub impl QuartzNativeFont {
-    static pub fn new(_lib: &NativeFontCache, buf: @~[u8], pt_size: float) -> Result<QuartzNativeFont, ()> {
+    static pub fn new(_lib: &QuartzNativeFontMatcher, buf: @~[u8], pt_size: float) -> Result<QuartzNativeFont, ()> {
         let fontprov = vec::as_imm_buf(*buf, |cbuf, len| {
             CGDataProviderCreateWithData(
                 null(),

src/servo/text/quartz/native_font_matcher.rs

@@ -0,0 +1,13 @@
+
+pub struct QuartzNativeFontMatcher {
+    dummy: int,
+
+    drop { }
+}
+
+pub impl QuartzNativeFontMatcher {
+    // this is a placeholder until NSFontManager or whatever is bound in here.
+    static pub fn new() -> QuartzNativeFontMatcher {
+        QuartzNativeFontMatcher { dummy: 42 }
+    }
+}