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verrou.go
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verrou.go
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// Copyright (C) 2017 Nicolas Lamirault <nicolas.lamirault@gmail.com>
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"flag"
"fmt"
"image"
"os"
"os/exec"
"github.com/disintegration/imaging"
"github.com/vova616/screenshot"
)
const (
// BANNER is what is printed for help/info output.
BANNER = "Verrou"
// VERSION is the binary version.
VERSION = "0.1.0"
blurSigma = 5.0
background = "/tmp/verrou.png"
)
var (
// Flags
dryrun bool
vrs bool
)
func init() {
// parse flags
flag.BoolVar(&vrs, "version", false, "print version and exit")
flag.BoolVar(&dryrun, "dry-run", false, "Create background image and not lock screen")
flag.Usage = func() {
fmt.Fprint(os.Stderr, fmt.Sprintf("%s - v%s\n", BANNER, VERSION))
flag.PrintDefaults()
}
flag.Parse()
if vrs {
fmt.Printf("v%s\n", VERSION)
os.Exit(0)
}
}
func lockScreen(path string) {
if err := exec.Command("i3lock", "-n", "-i"+path).Run(); err != nil {
panic(err)
}
}
func makeScreenshot() (*image.RGBA, error) {
return screenshot.CaptureScreen()
}
func main() {
screenshot, err := makeScreenshot()
if err != nil {
panic(err)
}
blurredImage := imaging.Blur(screenshot, blurSigma)
err = imaging.Save(blurredImage, background)
if err != nil {
panic(err)
}
if !dryrun {
lockScreen(background)
}
}