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somewhat DRYer code for font loading

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This commit is contained in:
Martin Algesten 2017-05-13 11:46:31 +02:00 • committed by Joe Wilm
parent 0321f3dcfb
commit cc3419df2b
1 changed files with 29 additions and 39 deletions
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68
src/renderer/mod.rs
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@ -28,7 +28,7 @@ use gl;
use index::{Line, Column, RangeInclusive};
use notify::{Watcher as WatcherApi, RecommendedWatcher as Watcher, op};
use config::{Config, Delta};
use config::{self, Config, Delta};
use term::{self, cell, RenderableCell};
use window::{Size, Pixels};
@ -176,54 +176,44 @@ impl GlyphCache {
let size = font.size();
let glyph_offset = *font.glyph_offset();
// Load regular font
let regular_desc = if let Some(ref style) = font.normal.style {
FontDesc::new(&font.normal.family[..], font::Style::Specific(style.to_owned()))
} else {
let style = font::Style::Description {
slant: font::Slant::Normal,
weight: font::Weight::Normal
fn make_desc(
desc: &config::FontDescription,
slant: font::Slant,
weight: font::Weight,
) -> FontDesc
{
let style = if let Some(ref spec) = desc.style {
font::Style::Specific(spec.to_owned())
} else {
font::Style::Description {slant, weight}
};
FontDesc::new(&font.normal.family[..], style)
};
FontDesc::new(&desc.family[..], style)
}
// Load regular font
let regular_desc = make_desc(&font.normal, font::Slant::Normal, font::Weight::Normal);
let regular = rasterizer
.load_font(&regular_desc, size)?;
// Load bold font
let bold_desc = if let Some(ref style) = font.bold.style {
FontDesc::new(&font.bold.family[..], font::Style::Specific(style.to_owned()))
} else {
let style = font::Style::Description {
slant: font::Slant::Normal,
weight: font::Weight::Bold
};
FontDesc::new(&font.bold.family[..], style)
// helper to load a description if it is not the regular_desc
let load_or_regular = |desc:FontDesc, rasterizer: &mut Rasterizer| {
if desc == regular_desc {
regular
} else {
rasterizer.load_font(&desc, size).unwrap_or_else(|_| regular)
}
};
let bold = if bold_desc == regular_desc {
regular
} else {
rasterizer.load_font(&bold_desc, size).unwrap_or_else(|_| regular)
};
// Load bold font
let bold_desc = make_desc(&font.bold, font::Slant::Normal, font::Weight::Bold);
let bold = load_or_regular(bold_desc, &mut rasterizer);
// Load italic font
let italic_desc = if let Some(ref style) = font.italic.style {
FontDesc::new(&font.italic.family[..], font::Style::Specific(style.to_owned()))
} else {
let style = font::Style::Description {
slant: font::Slant::Italic,
weight: font::Weight::Normal
};
FontDesc::new(&font.italic.family[..], style)
};
let italic_desc = make_desc(&font.italic, font::Slant::Italic, font::Weight::Normal);
let italic = if italic_desc == regular_desc {
regular
} else {
rasterizer.load_font(&italic_desc, size)
.unwrap_or_else(|_| regular)
};
let italic = load_or_regular(italic_desc, &mut rasterizer);
// Need to load at least one glyph for the face before calling metrics.
// The glyph requested here ('m' at the time of writing) has no special