servo: Merge #3675 - Add support for local font faces. Improves fonts on rust lang and guide (from glennw:local-fonts); r=pcwalton

Source-Repo: https://github.com/servo/servo
Source-Revision: 48ce107d7275c08273cea6dca3523d0eee23eea7

servo/components/gfx/font_cache_task.rs

@@ -13,7 +13,7 @@ use sync::Arc;
 use font_template::{FontTemplate, FontTemplateDescriptor};
 use platform::font_template::FontTemplateData;
 use servo_net::resource_task::{ResourceTask, load_whole_resource};
-use url::Url;
+use style::{Source, LocalSource, UrlSource_};
 
 /// A list of font templates that make up a given font family.
 struct FontFamily {
@@ -72,7 +72,7 @@ impl FontFamily {
 pub enum Command {
     GetFontTemplate(String, FontTemplateDescriptor, Sender<Reply>),
     GetLastResortFontTemplate(FontTemplateDescriptor, Sender<Reply>),
-    AddWebFont(String, Url, Sender<()>),
+    AddWebFont(String, Source, Sender<()>),
     Exit(Sender<()>),
 }
 
@@ -116,19 +116,31 @@ impl FontCache {
                     let font_template = self.get_last_resort_font_template(&descriptor);
                     result.send(GetFontTemplateReply(Some(font_template)));
                 }
-                AddWebFont(family_name, url, result) => {
-                    let maybe_resource = load_whole_resource(&self.resource_task, url.clone());
-                    match maybe_resource {
-                        Ok((_, bytes)) => {
-                            if !self.web_families.contains_key(&family_name) {
-                                let family = FontFamily::new();
-                                self.web_families.insert(family_name.clone(), family);
+                AddWebFont(family_name, src, result) => {
+                    if !self.web_families.contains_key(&family_name) {
+                        let family = FontFamily::new();
+                        self.web_families.insert(family_name.clone(), family);
+                    }
+
+                    match src {
+                        UrlSource_(ref url_source) => {
+                            let url = &url_source.url;
+                            let maybe_resource = load_whole_resource(&self.resource_task, url.clone());
+                            match maybe_resource {
+                                Ok((_, bytes)) => {
+                                    let family = self.web_families.get_mut(&family_name);
+                                    family.add_template(url.to_string().as_slice(), Some(bytes));
+                                },
+                                Err(_) => {
+                                    debug!("Failed to load web font: family={} url={}", family_name, url);
+                                }
                             }
+                        }
+                        LocalSource(ref local_family_name) => {
                             let family = self.web_families.get_mut(&family_name);
-                            family.add_template(format!("{}", url).as_slice(), Some(bytes));
-                        },
-                        Err(_) => {
-                            debug!("Failed to load web font: family={} url={}", family_name, url);
+                            get_variations_for_family(local_family_name.as_slice(), |path| {
+                                family.add_template(path.as_slice(), None);
+                            });
                         }
                     }
                     result.send(());
@@ -290,9 +302,9 @@ impl FontCacheTask {
         }
     }
 
-    pub fn add_web_font(&self, family: String, url: Url) {
+    pub fn add_web_font(&self, family: String, src: Source) {
         let (response_chan, response_port) = channel();
-        self.chan.send(AddWebFont(family, url, response_chan));
+        self.chan.send(AddWebFont(family, src, response_chan));
         response_port.recv();
     }
 

servo/components/layout/layout_task.rs

@@ -469,8 +469,8 @@ impl LayoutTask {
     fn handle_add_stylesheet<'a>(&'a self, sheet: Stylesheet, possibly_locked_rw_data: &mut Option<MutexGuard<'a, LayoutTaskData>>) {
         // Find all font-face rules and notify the font cache of them.
         // GWTODO: Need to handle unloading web fonts (when we handle unloading stylesheets!)
-        iter_font_face_rules(&sheet, |family, url| {
-            self.font_cache_task.add_web_font(family.to_string(), url.clone());
+        iter_font_face_rules(&sheet, |family, src| {
+            self.font_cache_task.add_web_font(family.to_string(), (*src).clone());
         });
         let mut rw_data = self.lock_rw_data(possibly_locked_rw_data);
         rw_data.stylist.add_stylesheet(sheet, AuthorOrigin);

servo/components/style/font_face.rs

@@ -14,10 +14,7 @@ use media_queries::{Device, Screen};
 use url::{Url, UrlParser};
 
 
-static SUPPORTED_FORMATS: &'static [&'static str] = &["truetype", "opentype"];
-
-
-pub fn iter_font_face_rules_inner(rules: &[CSSRule], callback: |family: &str, source: &Url|) {
+pub fn iter_font_face_rules_inner(rules: &[CSSRule], callback: |family: &str, source: &Source|) {
     let device = &Device { media_type: Screen };  // TODO, use Print when printing
     for rule in rules.iter() {
         match *rule {
@@ -27,22 +24,20 @@ pub fn iter_font_face_rules_inner(rules: &[CSSRule], callback: |family: &str, so
             },
             CSSFontFaceRule(ref rule) => {
                 for source in rule.sources.iter() {
-                    if source.format_hints.is_empty() || source.format_hints.iter().any(
-                            |f| SUPPORTED_FORMATS.iter().any(
-                                |s| f.as_slice().eq_ignore_ascii_case(*s))) {
-                        callback(rule.family.as_slice(), &source.url)
-                    }
+                    callback(rule.family.as_slice(), source)
                 }
             },
         }
     }
 }
 
-enum Source {
+#[deriving(Clone)]
+pub enum Source {
     UrlSource_(UrlSource),
     LocalSource(String),
 }
 
+#[deriving(Clone)]
 pub struct UrlSource {
     pub url: Url,
     pub format_hints: Vec<String>,
@@ -50,7 +45,7 @@ pub struct UrlSource {
 
 pub struct FontFaceRule {
     pub family: String,
-    pub sources: Vec<UrlSource>,  // local() is not supported yet
+    pub sources: Vec<Source>,
 }
 
 pub fn parse_font_face_rule(rule: AtRule, parent_rules: &mut Vec<CSSRule>, base_url: &Url) {
@@ -93,7 +88,7 @@ pub fn parse_font_face_rule(rule: AtRule, parent_rules: &mut Vec<CSSRule>, base_
                     },
                     "src" => {
                         match parse_slice_comma_separated(
-                                value.as_slice(), |iter| parse_one_url_src(iter, base_url)) {
+                                value.as_slice(), |iter| parse_one_src(iter, base_url)) {
                             Ok(sources) => maybe_sources = Some(sources),
                             Err(()) => log_css_error(location, "Invalid src in @font-face"),
                         };
@@ -117,15 +112,6 @@ pub fn parse_font_face_rule(rule: AtRule, parent_rules: &mut Vec<CSSRule>, base_
 }
 
 
-/// local() is not supported yet
-fn parse_one_url_src(iter: ParserIter, base_url: &Url) -> Result<UrlSource, ()> {
-    match parse_one_src(iter, base_url) {
-        Ok(UrlSource_(source)) => Ok(source),
-        _ => Err(())
-    }
-}
-
-
 fn parse_one_src(iter: ParserIter, base_url: &Url) -> Result<Source, ()> {
     let url = match iter.next() {
         // Parsing url()

servo/components/style/lib.rs

@@ -48,6 +48,7 @@ pub use selectors::{PseudoElement, Before, After, SelectorList, parse_selector_l
 pub use selectors::{AttrSelector, NamespaceConstraint, SpecificNamespace, AnyNamespace};
 pub use selectors::{SimpleSelector,LocalNameSelector};
 pub use cssparser::{Color, RGBA};
+pub use font_face::{Source, LocalSource, UrlSource_};
 
 mod stylesheets;
 mod errors;

servo/components/style/stylesheets.rs

@@ -16,7 +16,7 @@ use errors::{ErrorLoggerIterator, log_css_error};
 use namespaces::{NamespaceMap, parse_namespace_rule};
 use media_queries::{MediaRule, parse_media_rule};
 use media_queries;
-use font_face::{FontFaceRule, parse_font_face_rule, iter_font_face_rules_inner};
+use font_face::{FontFaceRule, Source, parse_font_face_rule, iter_font_face_rules_inner};
 
 
 pub struct Stylesheet {
@@ -173,6 +173,6 @@ pub fn iter_stylesheet_style_rules(stylesheet: &Stylesheet, device: &media_queri
 
 
 #[inline]
-pub fn iter_font_face_rules(stylesheet: &Stylesheet, callback: |family: &str, sources: &Url|) {
+pub fn iter_font_face_rules(stylesheet: &Stylesheet, callback: |family: &str, source: &Source|) {
     iter_font_face_rules_inner(stylesheet.rules.as_slice(), callback)
 }