display browser name in tooltip

reads /proc/<pid>/cmdline directly instead of using a library.

README.md

@@ -15,7 +15,7 @@ MPRIS2 is widely supported, so this component should work with:
 * Most other music/media players
 
 ## Install
-`go get github.com/hrfee/waybar-mpris`
+`go get github.com/hrfee/waybar-mpris` will install the program, as well as the go dbus bindings and pflags for command-line arguments.
 
 or just grab the `waybar-mpris` binary from here and place it in your PATH.
 

main.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"github.com/godbus/dbus/v5"
 	flag "github.com/spf13/pflag"
+	"io/ioutil"
 	"log"
 	"net"
 	"os"
@@ -17,6 +18,12 @@ var knownPlayers = map[string]string{
 	"noson":                      "Noson",
 }
 
+var knownBrowsers = map[string]string{
+	"mozilla":  "Firefox",
+	"chrome":   "Chrome",
+	"chromium": "Chromium",
+}
+
 type Player struct {
 	player                               dbus.BusObject
 	fullName, name, title, artist, album string
@@ -50,6 +57,20 @@ func NewPlayer(conn *dbus.Conn, name string) (p *Player) {
 	for key, val := range knownPlayers {
 		if strings.Contains(name, key) {
 			playerName = val
+			if val == "Browser" {
+				var pid uint32
+				conn.BusObject().Call("org.freedesktop.DBus.GetConnectionUnixProcessID", 0, name).Store(&pid)
+				file, err := ioutil.ReadFile(fmt.Sprintf("/proc/%d/cmdline", pid))
+				if err == nil {
+					cmd := string(file)
+					for k, v := range knownBrowsers {
+						if strings.Contains(cmd, k) {
+							playerName = v
+							break
+						}
+					}
+				}
+			}
 			break
 		}
 	}