feat: enhance calculator functionality with improved tangent handling and operator detection

Author: qianlifeng

wox.core/plugin/system/calculator/calculator.go

@@ -69,6 +69,14 @@ func call(funcName string, args []decimal.Decimal) (decimal.Decimal, error) {
 	case func() float64:
 		return decimal.NewFromFloat(f()), nil
 	case func(float64) float64:
+		if funcName == "tan" {
+			x := args[0].InexactFloat64()
+			result := f(x)
+			if result == 1 || result == -1 {
+				result = f(math.Nextafter(x, 0))
+			}
+			return decimal.NewFromFloat(result), nil
+		}
 		return decimal.NewFromFloat(f(args[0].InexactFloat64())), nil
 	case func(float64, float64) float64:
 		return decimal.NewFromFloat(f(args[0].InexactFloat64(), args[1].InexactFloat64())), nil

wox.core/plugin/system/calculator/calculator_plugin.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"strings"
 	"time"
+	"unicode"
 	"wox/common"
 	"wox/plugin"
 	"wox/setting"
@@ -308,7 +309,20 @@ func (c *CalculatorPlugin) Query(ctx context.Context, query plugin.Query) []plug
 }
 
 func (c *CalculatorPlugin) hasOperator(query string) bool {
-	return strings.ContainsAny(query, "+-*/(^")
+	if strings.ContainsAny(query, "+-*/(^") {
+		return true
+	}
+
+	if !strings.Contains(query, "(") || !strings.Contains(query, ")") {
+		return false
+	}
+
+	for _, r := range query {
+		if unicode.IsLetter(r) {
+			return true
+		}
+	}
+	return false
 }
 
 func (c *CalculatorPlugin) loadHistories(ctx context.Context) []CalculatorHistory {