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fonts: treat "charcell" spacing as monospace

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Some versions of fontconfig classify some fonts as having charcell
spacing.  We need to consider those as monospace as well.

refs: https://github.com/wez/wezterm/issues/1820
This commit is contained in:
Wez Furlong 2022-04-06 08:11:34 -07:00
parent a0ce1f9526
commit 1b0f5cf256
3 changed files with 10 additions and 6 deletions
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1
docs/changelog.md
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@ -48,6 +48,7 @@ As features stabilize some brief notes about them will accumulate here.
* Workaround for fonts with broken horizontal advance metrics [#1787](https://github.com/wez/wezterm/issues/1787)
* Improved mouse based selection. Thanks to [@davidrios](https://github.com/davidrios)! [#1805](https://github.com/wez/wezterm/issues/1805) [#1199](https://github.com/wez/wezterm/issues/1199) [#1386](https://github.com/wez/wezterm/issues/1386) [#354](https://github.com/wez/wezterm/issues/354)
* X11 `KP_End` wasn't recognized [#1804](https://github.com/wez/wezterm/issues/1804)
* fontconfig matches now also treat `"charcell"` spacing as monospace. [#1820](https://github.com/wez/wezterm/issues/1820)
### 20220319-142410-0fcdea07

1
wezterm-font/src/fcwrap.rs
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@ -8,6 +8,7 @@ use std::ffi::{CStr, CString};
use std::os::raw::{c_char, c_int};
use std::{fmt, mem, ptr};
pub const FC_CHARCELL: i32 = 110;
pub const FC_MONO: i32 = 100;
pub const FC_DUAL: i32 = 90;

14
wezterm-font/src/locator/font_config.rs
View File

@ -3,13 +3,13 @@ use crate::locator::{FontDataHandle, FontDataSource, FontLocator, FontOrigin};
use crate::parser::ParsedFont;
use anyhow::Context;
use config::{FontAttributes, FontStyle, FontWeight};
use fcwrap::{CharSet, FontSet, Pattern as FontPattern, FC_DUAL, FC_MONO};
use fcwrap::{CharSet, FontSet, Pattern as FontPattern, FC_CHARCELL, FC_DUAL, FC_MONO};
use std::collections::HashSet;
use std::convert::TryInto;
/// Allow for both monospace and dual spacing; both of these are
/// Allow for monospace, dual and charcell spacing; these are
/// fixed width styles so are desirable for a terminal use case.
const SPACING: [i32; 2] = [FC_MONO, FC_DUAL];
const SPACING: [i32; 3] = [FC_MONO, FC_DUAL, FC_CHARCELL];
/// A FontLocator implemented using the system font loading
/// functions provided by font-config
@ -29,7 +29,7 @@ impl FontLocator for FontConfigFontLocator {
matches
.iter()
.filter_map(|p| match p.get_integer("spacing") {
Ok(n) if n == FC_MONO || n == FC_DUAL => Some(p),
Ok(n) if n == FC_MONO || n == FC_DUAL || n == FC_CHARCELL => Some(p),
// (probably!) no spacing defined. Assume monospace.
Err(_) => Some(p),
_ => None,
@ -44,7 +44,8 @@ impl FontLocator for FontConfigFontLocator {
pattern.family(&attr.family)?;
let matches = monospaced(pattern.list()?);
log::trace!(
"listing by family took {:?} to compute and is {:?}",
"listing {:?} by family took {:?} to compute and is {:?}",
attr.family,
start.elapsed(),
matches
);
@ -58,7 +59,8 @@ impl FontLocator for FontConfigFontLocator {
pattern.add_string("postscriptname", &attr.family)?;
let matches = monospaced(pattern.list()?);
log::trace!(
"listing by postscriptname took {:?} to compute and is {:?}",
"listing {:?} by postscriptname took {:?} to compute and is {:?}",
attr.family,
start.elapsed(),
matches
);