Fix font size checks and fallbacks

README.md

@@ -18,7 +18,7 @@ It is i3bar text generator.
 
 ## How to build it
 
-This appliction was tested to compile with go v1.24.
+This application was tested to compile with go v1.24.
 
 All you need is go lang compiler and gnu make utility. Invoke
 

internal/lib/batteries.go

@@ -29,7 +29,7 @@ func (c *MyConfig) UpdateBatteryInfo() {
 		}
 
 		var (
-			batteries []*battery.Battery = []*battery.Battery{}
+			batteries = []*battery.Battery{}
 			Batts     string
 			ch        int
 			status    string
@@ -52,6 +52,7 @@ func (c *MyConfig) UpdateBatteryInfo() {
 
 					if err != nil {
 						log.Printf("Unable to read file %s: %s", file, err)
+
 						continue
 					}
 
@@ -65,6 +66,7 @@ func (c *MyConfig) UpdateBatteryInfo() {
 
 						if err != nil {
 							log.Printf("Unable to read file %s: %s", statusFile, err)
+
 							continue
 						}
 
@@ -91,6 +93,7 @@ func (c *MyConfig) UpdateBatteryInfo() {
 
 					if err != nil {
 						log.Printf("Unable to convert string from file %s to integer", file)
+
 						continue
 					}
 
@@ -100,9 +103,9 @@ func (c *MyConfig) UpdateBatteryInfo() {
 				}
 			}
 		} else {
-			batteries, _ = battery.GetAll()
 			// In theory, this module should give for each entry its separate err, but in practice it gives
 			// one single err for all entries, so we cannot detemine whist exatly entry errored.
+			batteries, _ = battery.GetAll()
 		}
 
 		var (

internal/lib/config.go

@@ -246,6 +246,10 @@ type MyConfig struct {
 
 	AppButtons struct {
 		Enabled    bool      `json:"enabled,omitempty"`
+		Color      string    `json:"color,omitempty"`
+		Background string    `json:"background,omitempty"`
+		Font       string    `json:"font,omitempty"`
+		FontSize   string    `json:"font_size,omitempty"`
 		Separator  Separator `json:"separator,omitempty"`
 	} `json:"app_buttons,omitempty"`
 
@@ -258,6 +262,8 @@ type MyConfig struct {
 		Class               string   `json:"class,omitempty"`
 		Color               string   `json:"color,omitempty"`
 		Background          string   `json:"background,omitempty"`
+		Font                string   `json:"font,omitempty"`
+		FontSize            string   `json:"font_size,omitempty"`
 		Border              string   `json:"border,omitempty"`
 		BorderActive        string   `json:"border_active,omitempty"`
 		Separator           bool     `json:"separator,omitempty"`
@@ -464,6 +470,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.LA.FontSize == "" {
 		sampleConfig.LA.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.LA.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.LA.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.LA.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.LA.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.LA.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	if sampleConfig.LA.Separator.Left.Color == "" {
@@ -518,22 +548,6 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 		sampleConfig.LA.Separator.Right.Background = sampleConfig.Separator.Right.Background
 	}
 
-	if sampleConfig.LA.Separator.Right.Font == "" {
-		sampleConfig.LA.Separator.Right.Font = sampleConfig.Separator.Right.Font
-	}
-
-	if sampleConfig.LA.Separator.Right.FontSize == "" {
-		sampleConfig.LA.Separator.Right.FontSize = sampleConfig.Separator.Right.FontSize
-	}
-
-	if sampleConfig.LA.Separator.Right.Color == "" {
-		sampleConfig.LA.Separator.Right.Color = sampleConfig.Separator.Right.Color
-	}
-
-	if sampleConfig.LA.Separator.Right.Background == "" {
-		sampleConfig.LA.Separator.Right.Background = sampleConfig.Separator.Right.Background
-	}
-
 	if sampleConfig.LA.Separator.Right.Symbol == "" {
 		sampleConfig.LA.Separator.Right.Symbol = sampleConfig.Separator.Right.Symbol
 	}
@@ -584,6 +598,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.Mem.FontSize == "" {
 		sampleConfig.Mem.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.Mem.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.Mem.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.Mem.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.Mem.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.Mem.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	if sampleConfig.Mem.Separator.Left.Color == "" {
@@ -688,6 +726,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.Clock.FontSize == "" {
 		sampleConfig.Clock.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.Clock.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.Clock.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.Clock.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.Clock.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.Clock.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	if sampleConfig.Clock.Separator.Left.Enabled {
@@ -816,6 +878,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.Battery.FontSize == "" {
 		sampleConfig.Battery.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.Battery.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.Battery.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.Battery.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.Battery.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.Battery.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	if sampleConfig.Battery.Symbol == "" {
@@ -828,6 +914,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.Battery.SymbolFontSize == "" {
 		sampleConfig.Battery.SymbolFontSize = sampleConfig.Battery.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.Battery.SymbolFontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.Battery.SymbolFontSize: %s, fallback to %s",
+				err,
+				sampleConfig.Battery.FontSize,
+			)
+
+			sampleConfig.Battery.SymbolFontSize = sampleConfig.Battery.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.Battery.SymbolFontSize, fallback to %s",
+				sampleConfig.Battery.FontSize,
+			)
+
+			sampleConfig.Battery.SymbolFontSize = sampleConfig.Battery.FontSize
+		}
 	}
 
 	// sampleConfig.Battery.ChargeColor.Full will be empty string if not set
@@ -943,6 +1053,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.CPUTemp.FontSize == "" {
 		sampleConfig.CPUTemp.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.CPUTemp.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.CPUTemp.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.CPUTemp.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.CPUTemp.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.CPUTemp.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	if sampleConfig.CPUTemp.Separator.Left.Enabled {
@@ -1049,11 +1183,35 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 	}
 
 	if sampleConfig.Vpn.Font == "" {
-		sampleConfig.Vpn.FontSize = sampleConfig.Font
+		sampleConfig.Vpn.Font = sampleConfig.Font
 	}
 
 	if sampleConfig.Vpn.FontSize == "" {
 		sampleConfig.Vpn.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.Vpn.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.Vpn.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.Vpn.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.Vpn.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.Vpn.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	// Check status file at least once per 3 seconds
@@ -1198,6 +1356,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.SimpleVolumePa.FontSize == "" {
 		sampleConfig.SimpleVolumePa.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.SimpleVolumePa.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.SimpleVolumePa.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.SimpleVolumePa.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.SimpleVolumePa.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.SimpleVolumePa.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	if sampleConfig.SimpleVolumePa.Symbol == "" {
@@ -1210,6 +1392,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.SimpleVolumePa.SymbolFontSize == "" {
 		sampleConfig.SimpleVolumePa.SymbolFontSize = sampleConfig.SimpleVolumePa.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.SimpleVolumePa.SymbolFontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.SimpleVolumePa.SymbolFontSize: %s, fallback to %s",
+				err,
+				sampleConfig.SimpleVolumePa.FontSize,
+			)
+
+			sampleConfig.SimpleVolumePa.SymbolFontSize = sampleConfig.SimpleVolumePa.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.SimpleVolumePa.SymbolFontSize, fallback to %s",
+				sampleConfig.SimpleVolumePa.FontSize,
+			)
+
+			sampleConfig.SimpleVolumePa.SymbolFontSize = sampleConfig.SimpleVolumePa.FontSize
+		}
 	}
 
 	if sampleConfig.SimpleVolumePa.Step == 0 {
@@ -1370,6 +1576,29 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.NetIf.FontSize == "" {
 		sampleConfig.NetIf.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.NetIf.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.NetIf.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.NetIf.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf("Unable to set sampleConfig.NetIf.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.NetIf.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	if sampleConfig.NetIf.Separator.Left.Color == "" {
@@ -1463,6 +1692,7 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.CmdRun.Cmd == "" && sampleConfig.CmdRun.Enabled {
 		sampleConfig.CmdRun.Enabled = false
+
 		log.Print(
 			"Setting sampleConfig.CmdRun.Enabled to false because sampleConfig.CmdRun.Cmd is not set",
 		)
@@ -1484,6 +1714,30 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 	if sampleConfig.CmdRun.FontSize == "" {
 		sampleConfig.CmdRun.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.CmdRun.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.CmdRun.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.CmdRun.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.CmdRun.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.CmdRun.FontSize = sampleConfig.FontSize
+		}
 	}
 
 	if sampleConfig.CmdRun.Separator.Left.Color == "" {
@@ -1575,6 +1829,45 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 	}
 
 	// sampleConfig.AppButtons.Enabled will false if not set in config
+	if sampleConfig.AppButtons.Color == "" {
+		sampleConfig.AppButtons.Color = sampleConfig.Color
+	}
+
+	if sampleConfig.AppButtons.Background == "" {
+		sampleConfig.AppButtons.Background = sampleConfig.Background
+	}
+
+	if sampleConfig.AppButtons.Font == "" {
+		sampleConfig.AppButtons.Font = sampleConfig.Font
+	}
+
+	if sampleConfig.AppButtons.FontSize == "" {
+		sampleConfig.AppButtons.FontSize = sampleConfig.FontSize
+	} else {
+		matched, err := regexp.MatchString(
+			`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+			sampleConfig.AppButtons.FontSize,
+		)
+
+		if err != nil {
+			log.Printf(
+				"Unable to set sampleConfig.AppButtons.FontSize: %s, fallback to %s",
+				err,
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.AppButtons.FontSize = sampleConfig.FontSize
+		}
+
+		if !matched {
+			log.Printf(
+				"Unable to set sampleConfig.AppButtons.FontSize, fallback to %s",
+				sampleConfig.FontSize,
+			)
+
+			sampleConfig.AppButtons.FontSize = sampleConfig.FontSize
+		}
+	}
 
 	if sampleConfig.AppButtons.Separator.Left.Color == "" {
 		sampleConfig.AppButtons.Separator.Left.Color = sampleConfig.Separator.Left.Color
@@ -1675,23 +1968,57 @@ func ReadConf(defaultConfig []byte) (*MyConfig, error) {
 
 			// app.Args can be empty slice. In that case command will be run without aruments.
 			if app.Cmd == "" {
+				// If command omitted it will be just /usr/bin/true.
 				app.Cmd = "true"
 			}
 
 			if app.Color == "" {
-				app.Color = sampleConfig.Color
+				app.Color = sampleConfig.AppButtons.Color
 			}
 
 			if app.Background == "" {
-				app.Background = sampleConfig.Background
+				app.Background = sampleConfig.AppButtons.Background
+			}
+
+			if app.Font == "" {
+				app.Font = sampleConfig.AppButtons.Font
+			}
+
+			if app.FontSize == "" {
+				app.FontSize = sampleConfig.AppButtons.FontSize
+			} else {
+				matched, err := regexp.MatchString(
+					`^(xx-small|x-small|small|medium|large|x-large|xx-large|smaller|larger)$`,
+					app.FontSize,
+				)
+
+				if err != nil {
+					log.Printf(
+						"Unable to set %s.FontSize: %s, fallback to %s",
+						app.Name,
+						err,
+						sampleConfig.AppButtons.FontSize,
+					)
+
+					app.FontSize = sampleConfig.AppButtons.FontSize
+				}
+
+				if !matched {
+					log.Printf("Unable to set %s.FontSize, fallback to %s",
+						app.Name,
+						sampleConfig.AppButtons.FontSize,
+					)
+
+					app.FontSize = sampleConfig.AppButtons.FontSize
+				}
 			}
 
 			if app.Border == "" {
-				app.Border = sampleConfig.Color
+				app.Border = sampleConfig.AppButtons.Color
 			}
 
 			if app.BorderActive == "" {
-				app.BorderActive = sampleConfig.Color
+				app.BorderActive = sampleConfig.AppButtons.Color
 			}
 
 			// app.Separator can be omitted, in that case it is false

internal/lib/memory.go

@@ -51,7 +51,7 @@ func (c *MyConfig) UpdateMemStats() {
 			if c.Values.Memory.Usedpct != uint64(v.UsedPercent) || c.Values.Memory.Shared != v.Shared/1024/1024 || c.Values.Memory.Swap != v.SwapTotal-v.SwapFree {
 				c.Values.Memory.Usedpct = uint64(v.UsedPercent)
 				c.Values.Memory.Shared = v.Shared / 1024 / 1024
-				c.Values.Memory.Swap = sw.Used
+				c.Values.Memory.Swap = sw.Used / 1024 / 1024
 				c.Channels.UpdateReady <- true
 			}
 		} else {

internal/lib/runcommand.go

@@ -0,0 +1,41 @@
+package lib
+
+import (
+	"log"
+	"time"
+)
+
+// RunCommands gets list of commands runs them sequentally and conacatenates their output.
+func (c *MyConfig) RunCommand() {
+	var (
+		InitialDelay       = 100 * time.Millisecond
+		LoopIterationDelay = time.Duration(c.CmdRun.Delay) * time.Second
+		Delay              = InitialDelay
+		ticker             = time.NewTicker(Delay)
+	)
+
+	for range ticker.C {
+		if Delay == InitialDelay {
+			Delay = LoopIterationDelay
+			ticker.Reset(Delay)
+		}
+
+		var (
+			outputString string
+			command      = []string{c.CmdRun.Cmd}
+		)
+
+		if len(c.CmdRun.Args) > 0 {
+			command = append(command, c.CmdRun.Args...)
+		}
+
+		outputString += RunProcess(command)
+
+		log.Println(c.Values.RunCommandOutput)
+
+		if c.Values.RunCommandOutput != outputString {
+			c.Values.RunCommandOutput = outputString
+			c.Channels.UpdateReady <- true
+		}
+	}
+}

internal/lib/spawn.go

@@ -14,6 +14,7 @@ import (
 func (c *MyConfig) Spawner() {
 	for prg := range c.Channels.RunChan {
 		<-time.After(25 * time.Millisecond)
+
 		devnullR, _ := os.Open(os.DevNull)
 		devnullW, _ := os.OpenFile(os.DevNull, os.O_WRONLY|os.O_APPEND, 0644)
 
@@ -68,9 +69,9 @@ func RunProcess(command []string) string {
 
 	switch len(command) {
 	case 1:
-		cmd = exec.Command(command[0], "")
+		cmd = exec.Command(command[0], "") //nolint: gosec
 	default:
-		cmd = exec.Command(command[0], command[1:]...)
+		cmd = exec.Command(command[0], command[1:]...) //nolint: gosec
 	}
 
 	cmd.Dir = "/"
@@ -87,11 +88,11 @@ func RunProcess(command []string) string {
 		}
 
 		return ""
-	} else {
+	}
+
 	if stderr.String() != "" {
 		log.Printf("%s: %s", strings.Join(command, " "), stderr.String())
 	}
-	}
 
 	return strings.TrimRight(stdout.String(), "\n")
 }