mirror of
https://github.com/soywod/himalaya.git
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ad7cd28a3c
* init cargo workspaces * nix: fix assets path * doc: update rtp vim plugin * vim: add error message if loading vim plugin from vim/
79 lines
2.6 KiB
Rust
79 lines
2.6 KiB
Rust
use anyhow::{Context, Error, Result};
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use atty::Stream;
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use serde::Serialize;
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use std::{convert::TryFrom, fmt::Debug};
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use termcolor::{ColorChoice, StandardStream};
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use crate::output::{OutputFmt, OutputJson, Print, PrintTable, PrintTableOpts, WriteColor};
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pub trait PrinterService {
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fn print<T: Debug + Print + Serialize>(&mut self, data: T) -> Result<()>;
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fn print_table<T: Debug + PrintTable + Serialize>(
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&mut self,
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data: T,
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opts: PrintTableOpts,
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) -> Result<()>;
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fn is_json(&self) -> bool;
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}
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pub struct StdoutPrinter {
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pub writter: Box<dyn WriteColor>,
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pub fmt: OutputFmt,
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}
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impl PrinterService for StdoutPrinter {
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fn print<T: Debug + Print + Serialize>(&mut self, data: T) -> Result<()> {
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match self.fmt {
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OutputFmt::Plain => data.print(self.writter.as_mut()),
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OutputFmt::Json => serde_json::to_writer(self.writter.as_mut(), &OutputJson::new(data))
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.context("cannot write JSON to writter"),
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}
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}
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fn print_table<T: Debug + PrintTable + Serialize>(
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&mut self,
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data: T,
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opts: PrintTableOpts,
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) -> Result<()> {
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match self.fmt {
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OutputFmt::Plain => data.print_table(self.writter.as_mut(), opts),
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OutputFmt::Json => serde_json::to_writer(self.writter.as_mut(), &OutputJson::new(data))
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.context("cannot write JSON to writter"),
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}
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}
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fn is_json(&self) -> bool {
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self.fmt == OutputFmt::Json
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}
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}
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impl From<OutputFmt> for StdoutPrinter {
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fn from(fmt: OutputFmt) -> Self {
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let writter = StandardStream::stdout(if atty::isnt(Stream::Stdin) {
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// Colors should be deactivated if the terminal is not a tty.
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ColorChoice::Never
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} else {
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// Otherwise let's `termcolor` decide by inspecting the environment. From the [doc]:
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// - If `NO_COLOR` is set to any value, then colors will be suppressed.
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// - If `TERM` is set to dumb, then colors will be suppressed.
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// - In non-Windows environments, if `TERM` is not set, then colors will be suppressed.
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//
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// [doc]: https://github.com/BurntSushi/termcolor#automatic-color-selection
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ColorChoice::Auto
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});
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let writter = Box::new(writter);
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Self { writter, fmt }
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}
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}
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impl TryFrom<Option<&str>> for StdoutPrinter {
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type Error = Error;
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fn try_from(fmt: Option<&str>) -> Result<Self> {
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Ok(Self {
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fmt: OutputFmt::try_from(fmt)?,
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..Self::from(OutputFmt::Plain)
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})
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}
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}
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