Tassilo Horn
2 years ago
parent
784df6582e
commit
053becd176
15 changed files with 136 additions and 53 deletions
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// Copyright (C) 2022 Tassilo Horn <tsdh@gnu.org>
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//
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by the Free
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// Software Foundation, either version 3 of the License, or (at your option)
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// any later version.
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//
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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// more details.
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//
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// You should have received a copy of the GNU General Public License along with
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// this program. If not, see <https://www.gnu.org/licenses/>.
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//! Provides runtime formatting of strings since our format strings are read
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//! from the swayr config, not specified as literals, e.g., `{name:{:.30}}` in
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//! `format.window_format`.
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use rt_format::{ |
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Format, FormatArgument, NoNamedArguments, ParsedFormat, Specifier, |
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}; |
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use std::fmt; |
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enum FmtArg<'a> { |
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Str(&'a str), |
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} |
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impl<'a> FormatArgument for FmtArg<'a> { |
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fn supports_format(&self, spec: &Specifier) -> bool { |
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spec.format == Format::Display |
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} |
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fn fmt_display(&self, f: &mut fmt::Formatter) -> fmt::Result { |
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match self { |
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Self::Str(val) => fmt::Display::fmt(&val, f), |
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} |
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} |
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fn fmt_debug(&self, _f: &mut fmt::Formatter) -> fmt::Result { |
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Err(fmt::Error) |
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} |
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fn fmt_octal(&self, _f: &mut fmt::Formatter) -> fmt::Result { |
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Err(fmt::Error) |
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} |
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fn fmt_lower_hex(&self, _f: &mut fmt::Formatter) -> fmt::Result { |
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Err(fmt::Error) |
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} |
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fn fmt_upper_hex(&self, _f: &mut fmt::Formatter) -> fmt::Result { |
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Err(fmt::Error) |
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} |
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fn fmt_binary(&self, _f: &mut fmt::Formatter) -> fmt::Result { |
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Err(fmt::Error) |
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} |
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fn fmt_lower_exp(&self, _f: &mut fmt::Formatter) -> fmt::Result { |
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Err(fmt::Error) |
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} |
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fn fmt_upper_exp(&self, _f: &mut fmt::Formatter) -> fmt::Result { |
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Err(fmt::Error) |
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} |
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} |
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impl<'a> std::convert::TryInto<usize> for &FmtArg<'a> { |
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type Error = (); |
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fn try_into(self) -> Result<usize, Self::Error> { |
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Err(()) |
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} |
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} |
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pub fn format(fmt: &str, arg: &str) -> String { |
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let args = &[FmtArg::Str(arg)]; |
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if let Ok(pf) = ParsedFormat::parse(fmt, args, &NoNamedArguments) { |
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format!("{}", pf) |
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} else { |
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format!("Invalid format string: {}", fmt) |
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} |
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} |
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