From bfba9c743e0345822cac4f43da178a7e7f170a39 Mon Sep 17 00:00:00 2001
From: Nils Hjelte <nils@vixel.no>
Date: Wed, 31 May 2023 14:45:48 +0200
Subject: [PATCH] Add scale factor setting

Implementation copied from https://github.com/grafana/grafana-kiosk/pull/77
---
 README.md                     | 5 +++++
 pkg/cmd/grafana-kiosk/main.go | 5 +++++
 pkg/kiosk/config.go           | 1 +
 pkg/kiosk/utils.go            | 4 ++++
 4 files changed, 15 insertions(+)

diff --git a/README.md b/README.md
index 9b47bbb..4cbd0a1 100644
--- a/README.md
+++ b/README.md
@@ -110,6 +110,8 @@ NOTE: Flags with parameters should use an "equals"
       Top Left Position of Kiosk (default "0,0")
   -window-size string
       Size of Kiosk in pixels (e.g. "1920,1080")
+  -scale-factor string
+      Scale factor of Kiosk. This is sort of like zoom. (default: "1")
 ```
 
 ### Using a configuration file
@@ -123,6 +125,7 @@ general:
   autofit: true
   lxde: true
   lxde-home: /home/pi
+  scale-factor: 1.0
 
 target:
   login-method: anon
@@ -153,6 +156,8 @@ They can also be used instead of a configuration file.
       Top Left Position of Kiosk (default "0,0")
   KIOSK_WINDOW_SIZE string
       Size of Kiosk in pixels (e.g. "1920,1080")
+  KIOSK_SCALE_FACTOR string
+      Scale factor, like zoom
   KIOSK_IGNORE_CERTIFICATE_ERRORS bool
       Ignore SSL/TLS certificate errors (default "false")
   KIOSK_IS_PLAYLIST bool
diff --git a/pkg/cmd/grafana-kiosk/main.go b/pkg/cmd/grafana-kiosk/main.go
index e5678a5..6501a6c 100644
--- a/pkg/cmd/grafana-kiosk/main.go
+++ b/pkg/cmd/grafana-kiosk/main.go
@@ -40,6 +40,7 @@ type Args struct {
 	PasswordField           string
 	WindowPosition          string
 	WindowSize              string
+	ScaleFactor             string
 }
 
 // ProcessArgs processes and handles CLI arguments.
@@ -56,6 +57,7 @@ func ProcessArgs(cfg interface{}) Args {
 	flagSettings.StringVar(&processedArgs.URL, "URL", "https://play.grafana.org", "URL to Grafana server")
 	flagSettings.StringVar(&processedArgs.WindowPosition, "window-position", "0,0", "Top Left Position of Kiosk")
 	flagSettings.StringVar(&processedArgs.WindowSize, "window-size", "", "Size of Kiosk in pixels (width,height)")
+	flagSettings.StringVar(&processedArgs.ScaleFactor, "scale-factor", "1.0", "Scale factor, sort of zoom")
 	flagSettings.BoolVar(&processedArgs.IsPlayList, "playlists", false, "URL is a playlist")
 	flagSettings.BoolVar(&processedArgs.AutoFit, "autofit", true, "Fit panels to screen")
 	flagSettings.BoolVar(&processedArgs.LXDEEnabled, "lxde", false, "Initialize LXDE for kiosk mode")
@@ -122,6 +124,8 @@ func summary(cfg *kiosk.Config) {
 	log.Println("Mode:", cfg.General.Mode)
 	log.Println("WindowPosition:", cfg.General.WindowPosition)
 	log.Println("WindowSize:", cfg.General.WindowSize)
+	log.Println("ScaleFactor:", cfg.General.ScaleFactor)
+
 	// target
 	log.Println("URL:", cfg.Target.URL)
 	log.Println("LoginMethod:", cfg.Target.LoginMethod)
@@ -182,6 +186,7 @@ func main() {
 		cfg.General.Mode = args.Mode
 		cfg.General.WindowPosition = args.WindowPosition
 		cfg.General.WindowSize = args.WindowSize
+		cfg.General.ScaleFactor = args.ScaleFactor
 		//
 		cfg.GOAUTH.AutoLogin = args.OauthAutoLogin
 		cfg.GOAUTH.UsernameField = args.UsernameField
diff --git a/pkg/kiosk/config.go b/pkg/kiosk/config.go
index 42c6513..3a4b6c8 100644
--- a/pkg/kiosk/config.go
+++ b/pkg/kiosk/config.go
@@ -12,6 +12,7 @@ type Config struct {
 		Mode           string `yaml:"kiosk-mode" env:"KIOSK_MODE" env-default:"full" env-description:"[full|tv|disabled]"`
 		WindowPosition string `yaml:"window-position" env:"KIOSK_WINDOW_POSITION" env-default:"0,0" env-description:"Top Left Position of Kiosk"`
 		WindowSize     string `yaml:"window-size" env:"KIOSK_WINDOW_SIZE" env-default:"" env-description:"Size of Kiosk in pixels (width,height)"`
+		ScaleFactor    string `yaml:"scale-factor" env:"KIOSK_SCALE_FACTOR" env-default:"1.0" env-description:"Scale factor, like zoom"`
 	} `yaml:"general"`
 	Target struct {
 		IgnoreCertificateErrors bool   `yaml:"ignore-certificate-errors" env:"KIOSK_IGNORE_CERTIFICATE_ERRORS" env-description:"ignore SSL/TLS certificate errors" env-default:"false"`
diff --git a/pkg/kiosk/utils.go b/pkg/kiosk/utils.go
index 934cd8a..1977cb5 100644
--- a/pkg/kiosk/utils.go
+++ b/pkg/kiosk/utils.go
@@ -73,5 +73,9 @@ func generateExecutorOptions(dir string, cfg *Config) []chromedp.ExecAllocatorOp
 		execAllocatorOption = append(execAllocatorOption, chromedp.Flag("window-size", cfg.General.WindowSize))
 	}
 
+	if cfg.General.ScaleFactor != "" {
+		execAllocatorOption = append(execAllocatorOption, chromedp.Flag("force-device-scale-factor", cfg.General.ScaleFactor))
+	}
+
 	return execAllocatorOption
 }