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use std::default::Default;
use std::error;
use std::fmt;
use std::io::{Error, ErrorKind, Result};
use std::process::{Command, Output};
use std::str::FromStr;
#[derive(Debug, Eq, PartialEq, Copy, Clone, Hash)]
pub enum Browser {
Default,
Firefox,
InternetExplorer,
Chrome,
Opera,
Safari,
}
#[derive(Debug, Eq, PartialEq, Copy, Clone, Hash)]
pub struct ParseBrowserError;
impl fmt::Display for ParseBrowserError {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("Invalid browser given")
}
}
impl error::Error for ParseBrowserError {
fn description(&self) -> &str {
"invalid browser"
}
}
impl Default for Browser {
fn default() -> Self {
Browser::Default
}
}
impl fmt::Display for Browser {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Browser::Default => f.write_str("Default"),
Browser::Firefox => f.write_str("Firefox"),
Browser::InternetExplorer => f.write_str("Internet Explorer"),
Browser::Chrome => f.write_str("Chrome"),
Browser::Opera => f.write_str("Opera"),
Browser::Safari => f.write_str("Safari"),
}
}
}
impl FromStr for Browser {
type Err = ParseBrowserError;
fn from_str(s: &str) -> ::std::result::Result<Self, Self::Err> {
match s {
"firefox" => Ok(Browser::Firefox),
"default" => Ok(Browser::Default),
"ie" | "internet explorer" | "internetexplorer" => Ok(Browser::InternetExplorer),
"chrome" => Ok(Browser::Chrome),
"opera" => Ok(Browser::Opera),
"safari" => Ok(Browser::Safari),
_ => Err(ParseBrowserError),
}
}
}
pub fn open(url: &str) -> Result<Output> {
open_browser(Browser::Default, url)
}
pub fn open_browser(browser: Browser, url: &str) -> Result<Output> {
open_browser_internal(browser, url)
}
#[cfg(target_os = "windows")]
#[inline]
fn open_browser_internal(browser: Browser, url: &str) -> Result<Output> {
match browser {
Browser::Default => Command::new("cmd").arg("/C").arg("start").arg(url).output(),
_ => Err(Error::new(
ErrorKind::NotFound,
"Only the default browser is supported on this platform right now",
)),
}
}
#[cfg(target_os = "macos")]
#[inline]
fn open_browser_internal(browser: Browser, url: &str) -> Result<Output> {
let mut cmd = Command::new("open");
match browser {
Browser::Default => cmd.arg(url).output(),
_ => {
let app: Option<&str> = match browser {
Browser::Firefox => Some("Firefox"),
Browser::Chrome => Some("Google Chrome"),
Browser::Opera => Some("Opera"),
Browser::Safari => Some("Safari"),
_ => None,
};
match app {
Some(name) => cmd.arg("-a").arg(name).arg(url).output(),
None => Err(Error::new(
ErrorKind::NotFound,
format!("Unsupported browser {:?}", browser),
)),
}
}
}
}
#[cfg(target_os = "linux")]
#[inline]
fn open_browser_internal(browser: Browser, url: &str) -> Result<Output> {
match browser {
Browser::Default => open_on_linux_using_browser_env(url)
.or_else(|_| -> Result<Output> { Command::new("xdg-open").arg(url).output() })
.or_else(|_| -> Result<Output> { Command::new("gvfs-open").arg(url).output() })
.or_else(|_| -> Result<Output> { Command::new("gnome-open").arg(url).output() }),
_ => Err(Error::new(
ErrorKind::NotFound,
"Only the default browser is supported on this platform right now",
)),
}
}
#[cfg(target_os = "linux")]
fn open_on_linux_using_browser_env(url: &str) -> Result<Output> {
let browsers = ::std::env::var("BROWSER")
.map_err(|_| -> Error { Error::new(ErrorKind::NotFound, format!("BROWSER env not set")) })?;
for browser in browsers.split(':') {
if !browser.is_empty() {
let cmdline = browser
.replace("%s", url)
.replace("%c", ":")
.replace("%%", "%");
let cmdarr: Vec<&str> = cmdline.split_whitespace().collect();
let mut cmd = Command::new(&cmdarr[0]);
if cmdarr.len() > 1 {
cmd.args(&cmdarr[1..cmdarr.len()]);
}
if !browser.contains("%s") {
cmd.arg(url);
}
if let Ok(output) = cmd.output() {
return Ok(output);
}
}
}
return Err(Error::new(
ErrorKind::NotFound,
"No valid command in $BROWSER",
));
}
#[cfg(not(any(target_os = "windows", target_os = "macos", target_os = "linux")))]
compile_error!("Only Windows, Mac OS and Linux are currently supported");
#[test]
fn test_open_default() {
assert!(open("http://github.com").is_ok());
}
#[test]
#[cfg(target_os = "macos")]
fn test_open_browser() {
assert!(open_browser(Browser::Firefox, "http://github.com").is_ok());
}