Feature/#478 keyboard events (#618)

* Added support of pressin special keys

* Linting

pkg/stdlib/html/press_selector.go

@@ -0,0 +1,52 @@
+package html
+
+import (
+	"context"
+	"github.com/MontFerret/ferret/pkg/runtime/values/types"
+
+	"github.com/MontFerret/ferret/pkg/drivers"
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+)
+
+// PRESS_SELECTOR presses a keyboard key.
+// @param {HTMLPage | HTMLDocument | HTMLElement} node - Target html node.
+// @param {String} selector - CSS selector.
+// @param {String | String[]} key - Target keyboard key(s).
+// @param {Int} [presses=1] - Count of presses.
+func PressSelector(ctx context.Context, args ...core.Value) (core.Value, error) {
+	err := core.ValidateArgs(args, 3, 4)
+
+	if err != nil {
+		return values.False, err
+	}
+
+	el, err := drivers.ToElement(args[0])
+
+	if err != nil {
+		return values.False, err
+	}
+
+	selector := values.ToString(args[1])
+
+	count := values.NewInt(1)
+
+	if len(args) == 4 {
+		countArg := values.ToInt(args[3])
+
+		if countArg > 0 {
+			count = countArg
+		}
+	}
+
+	keysArg := args[2]
+
+	switch keys := keysArg.(type) {
+	case values.String:
+		return values.None, el.PressBySelector(ctx, selector, []values.String{keys}, count)
+	case *values.Array:
+		return values.None, el.PressBySelector(ctx, selector, values.ToStrings2(keys), count)
+	default:
+		return values.None, core.TypeError(keysArg.Type(), types.String, types.Array)
+	}
+}