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Don't rely on font hint for format detection. Handle parsing comma

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separated format hints. Fix oversight in mac code dealing with
creating web fonts from memory.
This commit is contained in:
Glenn Watson 2014-07-14 15:57:46 +10:00
parent 40559d148a
commit c76cd128a7
7 changed files with 154 additions and 114 deletions
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45
src/components/gfx/font_cache_task.rs
View file

@ -42,6 +42,16 @@ impl FontFamily {
}
}
// If a request is made for a font family that exists,
// pick the first valid font in the family if we failed
// to find an exact match for the descriptor.
for template in self.templates.mut_iter() {
let maybe_template = template.get();
if maybe_template.is_some() {
return maybe_template;
}
}
None
}
@ -60,7 +70,7 @@ impl FontFamily {
/// Commands that the FontContext sends to the font cache task.
pub enum Command {
GetFontTemplate(String, FontTemplateDescriptor, Sender<Reply>),
AddWebFont(Url, String, Sender<()>),
AddWebFont(Vec<Url>, String, Sender<()>),
Exit(Sender<()>),
}
@ -88,7 +98,6 @@ impl FontCache {
match msg {
GetFontTemplate(family, descriptor, result) => {
let maybe_font_template = self.get_font_template(&family, &descriptor);
let font_template = match maybe_font_template {
Some(font_template) => font_template,
None => self.get_last_resort_template(&descriptor),
@ -96,19 +105,21 @@ impl FontCache {
result.send(GetFontTemplateReply(font_template));
}
AddWebFont(url, family_name, 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(urls, family_name, result) => {
for url in urls.iter() {
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);
}
let family = self.web_families.get_mut(&family_name);
family.add_template(format!("{}", url).as_slice(), Some(bytes));
},
Err(msg) => {
fail!(msg);
}
let family = self.web_families.get_mut(&family_name);
family.add_template(format!("{}", url).as_slice(), Some(bytes));
},
Err(msg) => {
fail!(msg);
}
}
result.send(());
@ -166,7 +177,7 @@ impl FontCache {
}
}
fn find_font_in_web_family<'a>(&'a mut self, family_name: &String, desc: &FontTemplateDescriptor)
fn find_font_in_web_family<'a>(&'a mut self, family_name: &String, desc: &FontTemplateDescriptor)
-> Option<Arc<FontTemplateData>> {
if self.web_families.contains_key(family_name) {
let family = self.web_families.get_mut(family_name);
@ -253,9 +264,9 @@ impl FontCacheTask {
}
}
pub fn add_web_font(&mut self, url: Url, family: &str) {
pub fn add_web_font(&mut self, urls: Vec<Url>, family: &str) {
let (response_chan, response_port) = channel();
self.chan.send(AddWebFont(url, family.to_string(), response_chan));
self.chan.send(AddWebFont(urls, family.to_string(), response_chan));
response_port.recv();
}

2
src/components/gfx/font_context.rs
View file

@ -34,7 +34,7 @@ fn create_scaled_font(backend: BackendType, template: &Arc<FontTemplateData>, pt
#[cfg(target_os="macos")]
fn create_scaled_font(backend: BackendType, template: &Arc<FontTemplateData>, pt_size: f64) -> ScaledFont {
let cgfont = template.ctfont.copy_to_CGFont();
let cgfont = template.ctfont.get_ref().copy_to_CGFont();
ScaledFont::new(backend, &cgfont, pt_size as AzFloat)
}

49
src/components/gfx/font_template.rs
View file

@ -44,6 +44,7 @@ pub struct FontTemplate {
descriptor: Option<FontTemplateDescriptor>,
weak_ref: Option<Weak<FontTemplateData>>,
strong_ref: Option<Arc<FontTemplateData>>, // GWTODO: Add code path to unset the strong_ref for web fonts!
is_valid: bool,
}
/// Holds all of the template information for a font that
@ -71,6 +72,7 @@ impl FontTemplate {
descriptor: None,
weak_ref: maybe_weak_ref,
strong_ref: maybe_strong_ref,
is_valid: true,
}
}
@ -95,23 +97,32 @@ impl FontTemplate {
}
},
None => {
let data = self.get_data();
let handle: Result<FontHandle, ()> = FontHandleMethods::new_from_template(fctx, data.clone(), None);
match handle {
Ok(handle) => {
let actual_desc = FontTemplateDescriptor::new(handle.boldness(),
handle.is_italic());
let desc_match = actual_desc == *requested_desc;
match self.is_valid {
true => {
let data = self.get_data();
let handle: Result<FontHandle, ()> = FontHandleMethods::new_from_template(fctx, data.clone(), None);
match handle {
Ok(handle) => {
let actual_desc = FontTemplateDescriptor::new(handle.boldness(),
handle.is_italic());
let desc_match = actual_desc == *requested_desc;
self.descriptor = Some(actual_desc);
if desc_match {
Some(data)
} else {
None
self.descriptor = Some(actual_desc);
self.is_valid = true;
if desc_match {
Some(data)
} else {
None
}
}
Err(()) => {
self.is_valid = false;
debug!("Unable to create a font from template {}", self.identifier);
None
}
}
}
Err(()) => {
debug!("Unable to create a font from template {}", self.identifier);
},
false => {
None
}
}
@ -119,6 +130,14 @@ impl FontTemplate {
}
}
/// Get the data for creating a font.
pub fn get(&mut self) -> Option<Arc<FontTemplateData>> {
match self.is_valid {
true => Some(self.get_data()),
false => None
}
}
/// Get the font template data. If any strong references still
/// exist, it will return a clone, otherwise it will load the
/// font data and store a weak reference to it internally.

18
src/components/gfx/platform/macos/font.rs
View file

@ -65,13 +65,17 @@ impl FontHandleMethods for FontHandle {
Some(s) => s,
None => 0.0
};
let ct_result = core_text::font::new_from_name(template.identifier.as_slice(), size);
ct_result.and_then(|ctfont| {
Ok(FontHandle {
font_data: template.clone(),
ctfont: ctfont,
})
})
match template.ctfont {
Some(ref ctfont) => {
Ok(FontHandle {
font_data: template.clone(),
ctfont: ctfont.clone_with_font_size(size),
})
}
None => {
Err(())
}
}
}
fn get_template(&self) -> Arc<FontTemplateData> {

11
src/components/gfx/platform/macos/font_template.rs
View file

@ -12,7 +12,7 @@ use core_text;
/// CTFont object is cached here for use by the
/// render functions that create CGFont references.
pub struct FontTemplateData {
pub ctfont: CTFont,
pub ctfont: Option<CTFont>,
pub identifier: String,
}
@ -21,11 +21,14 @@ impl FontTemplateData {
let ctfont = match font_data {
Some(bytes) => {
let fontprov = CGDataProvider::from_buffer(bytes.as_slice());
let cgfont = CGFont::from_data_provider(fontprov);
core_text::font::new_from_CGFont(&cgfont, 0.0)
let cgfont_result = CGFont::from_data_provider(fontprov);
match cgfont_result {
Ok(cgfont) => Some(core_text::font::new_from_CGFont(&cgfont, 0.0)),
Err(_) => None
}
},
None => {
core_text::font::new_from_name(identifier.as_slice(), 0.0).unwrap()
Some(core_text::font::new_from_name(identifier.as_slice(), 0.0).unwrap())
}
};

11
src/components/layout/layout_task.rs
View file

@ -61,7 +61,6 @@ use std::ptr;
use std::task::TaskBuilder;
use style::{AuthorOrigin, Stylesheet, Stylist};
use style::CSSFontFaceRule;
use style::TtfFormat;
use sync::{Arc, Mutex};
use url::Url;
@ -455,20 +454,16 @@ impl LayoutTask {
// Find all font-face rules and notify the font cache of them.
// GWTODO: Need to handle unloading web fonts (when we handle unloading stylesheets!)
// GWTODO: Need to handle font-face nested within media rules.
// GWTODO: Don't rely on format hint here. Should determine file format from data.
for rule in sheet.rules.iter() {
match rule {
&CSSFontFaceRule(ref font_face_rule) => {
let mut font_urls = vec!();
for source_line in font_face_rule.source_lines.iter() {
for source in source_line.sources.iter() {
match source.format_hint {
TtfFormat => {
self.font_cache_task.add_web_font(source.url.clone(), font_face_rule.family.as_slice());
},
_ => {}
}
font_urls.push(source.url.clone());
}
}
self.font_cache_task.add_web_font(font_urls, font_face_rule.family.as_slice());
},
_ => {}
}

132
src/components/style/font_face.rs
View file

@ -22,7 +22,7 @@ pub enum FontFaceFormat {
pub struct FontFaceSource {
pub url: Url,
pub format_hint: FontFaceFormat,
pub format_hints: Vec<FontFaceFormat>,
}
pub struct FontFaceSourceLine {
@ -35,7 +35,6 @@ pub struct FontFaceRule {
}
pub fn parse_font_face_rule(rule: AtRule, parent_rules: &mut Vec<CSSRule>, base_url: &Url) {
let mut maybe_family = None;
let mut source_lines = vec!();
@ -79,84 +78,95 @@ pub fn parse_font_face_rule(rule: AtRule, parent_rules: &mut Vec<CSSRule>, base_
'outer: loop {
// url() or local() should be next
let url = match iter.next() {
let maybe_url = match iter.next() {
Some(&URL(ref string_value)) => {
parse_url(string_value.as_slice(), Some(base_url.clone()))
Some(parse_url(string_value.as_slice(), Some(base_url.clone())))
},
Some(&Function(ref string_value, ref _values)) => {
match string_value.as_slice() {
"local" => {
log_css_error(location, "local font face is not supported yet - skipping");
None
},
_ => {
log_css_error(location, format!("Unexpected token {}", string_value).as_slice());
syntax_error = true;
break;
}
}
},
_ => {
log_css_error(location, "Unsupported declaration (local font face is not supported yet)");
log_css_error(location, "Unsupported declaration type");
syntax_error = true;
break;
}
};
// optional format, or comma to start loop again
let mut next_token = iter.next();
match next_token {
Some(&Function(ref string_value, ref values)) => {
match string_value.as_slice() {
"format" => {
let maybe_format_hint_string = one_component_value(
values.as_slice()).and_then(|c| {
match c {
&String(ref s) => Some(s.as_slice().to_ascii_lower()),
_ => None,
}
});
match maybe_format_hint_string {
Some(ref format_hint_string) => {
let format_hints: Vec<&str> = format_hint_string.as_slice().split(',').collect();
for format_hint in format_hints.iter() {
let format_hint = format_hint.trim();
let hint = match format_hint.as_slice() {
"embedded-opentype" => EotFormat,
"woff" => WoffFormat,
"truetype" | "opentype" => TtfFormat,
"svg" => SvgFormat,
_ => UnknownFormat,
};
match maybe_url {
Some(url) => {
let mut source = FontFaceSource {
url: url,
format_hints: vec!(),
};
if hint == UnknownFormat {
log_css_error(location,
format!("Unknown font format {}", format_hint).as_slice());
syntax_error = true;
break 'outer;
// optional format, or comma to start loop again
match next_token {
Some(&Function(ref string_value, ref values)) => {
match string_value.as_slice() {
"format" => {
let mut format_iter = values.as_slice().skip_whitespace();
loop {
let fmt_token = format_iter.next();
match fmt_token {
Some(&String(ref format_hint)) => {
let hint = match format_hint.as_slice() {
"embedded-opentype" => EotFormat,
"woff" => WoffFormat,
"truetype" | "opentype" => TtfFormat,
"svg" => SvgFormat,
_ => UnknownFormat,
};
source.format_hints.push(hint);
},
_ => {
log_css_error(location, "Unexpected token");
syntax_error = true;
break 'outer;
}
}
let source = FontFaceSource {
url: url.clone(),
format_hint: hint,
};
sources.push(source);
let comma_token = format_iter.next();
match comma_token {
Some(&Comma) => {},
None => {
break;
}
_ => {
log_css_error(location, "Unexpected token");
syntax_error = true;
break 'outer;
}
}
}
},
None => {
log_css_error(location,
_ => {
log_css_error(location,
format!("Unsupported token {}", string_value).as_slice());
syntax_error = true;
break;
break;
}
}
next_token = iter.next();
},
_ => {
log_css_error(location,
format!("Unsupported token {}", string_value).as_slice());
syntax_error = true;
break;
}
_ => {}
}
next_token = iter.next();
},
_ => {
let source = FontFaceSource {
url: url,
format_hint: UnknownFormat,
};
sources.push(source);
}
},
None => {},
}
// after url or optional format, comes comma or end
@ -171,9 +181,7 @@ pub fn parse_font_face_rule(rule: AtRule, parent_rules: &mut Vec<CSSRule>, base_
}
}
if !syntax_error {
assert!(sources.len() > 0);
if !syntax_error && sources.len() > 0 {
let source_line = FontFaceSourceLine {
sources: sources
};
@ -195,4 +203,4 @@ pub fn parse_font_face_rule(rule: AtRule, parent_rules: &mut Vec<CSSRule>, base_
};
parent_rules.push(CSSFontFaceRule(font_face_rule));
}
}
}