From 6184d7b6d69d6336c851a7ad1d9bd52b41ef8edb Mon Sep 17 00:00:00 2001
From: "Stanislav N. aka pztrn" <pztrn@pztrn.name>
Date: Sun, 17 May 2020 21:57:45 +0500
Subject: [PATCH] Added basic navbar.

---
 elements/nav.go             |  4 +-
 examples/helloworld/main.go |  7 +++
 widgets/navbar.go           | 88 +++++++++++++++++++++++++++++++++++++
 3 files changed, 97 insertions(+), 2 deletions(-)
 create mode 100644 widgets/navbar.go

diff --git a/elements/nav.go b/elements/nav.go
index b3f8580..52de82e 100644
--- a/elements/nav.go
+++ b/elements/nav.go
@@ -58,8 +58,6 @@ func NewNav(navOptions *NavOptions) *Nav {
 
 // Build builds element and calls Build() for all child elements.
 func (n *Nav) Build() *js.Object {
-	n.Object = js.Global.Get(common.HTMLElementDocument).Call(common.JSCallCreateElement, common.HTMLElementNav)
-
 	if n.options == nil {
 		n.AddClassesFromString(navDefaultClass)
 		n.BuildChilds(n.Object)
@@ -95,4 +93,6 @@ func (n *Nav) initialize(navOptions *NavOptions) {
 	n.options = navOptions
 
 	n.InitializeGeneric()
+
+	n.Object = js.Global.Get(common.HTMLElementDocument).Call(common.JSCallCreateElement, common.HTMLElementNav)
 }
diff --git a/examples/helloworld/main.go b/examples/helloworld/main.go
index 71899ad..f82742f 100644
--- a/examples/helloworld/main.go
+++ b/examples/helloworld/main.go
@@ -28,6 +28,7 @@ import (
 	"go.dev.pztrn.name/bulpherjs"
 	"go.dev.pztrn.name/bulpherjs/common"
 	"go.dev.pztrn.name/bulpherjs/elements"
+	"go.dev.pztrn.name/bulpherjs/widgets"
 )
 
 func main() {
@@ -44,6 +45,12 @@ func main() {
 }
 
 func start(a *bulpherjs.Application) {
+	nb := widgets.NewNavBar(&widgets.NavBarOptions{
+		IsDark: true,
+		Title:  "Example application",
+	})
+	a.HTML.Body.AddChild(nb)
+
 	mainSection := elements.NewSection(nil)
 
 	mainDiv := elements.NewDiv(&elements.DivOptions{
diff --git a/widgets/navbar.go b/widgets/navbar.go
new file mode 100644
index 0000000..9e0f278
--- /dev/null
+++ b/widgets/navbar.go
@@ -0,0 +1,88 @@
+// BulpherJS - bulma for GopherJS.
+// Copyright (c) 2020 by Stanislav Nikitin <pztrn@pztrn.name>
+//
+// Permission is hereby granted, free of charge, to any person obtaining
+// a copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to
+// permit persons to whom the Software is furnished to do so, subject to
+// the following conditions:
+//
+// The above copyright notice and this permission notice shall be
+// included in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+package widgets
+
+import (
+	"github.com/gopherjs/gopherjs/js"
+
+	"go.dev.pztrn.name/bulpherjs/elements"
+)
+
+// NavBarOptions is a "nav" HTML body element configuration structure.
+type NavBarOptions struct {
+	IsDark bool
+	Title  string
+}
+
+// NavBar is a controlling structure for "nav" HTML body element.
+type NavBar struct {
+	options *NavBarOptions
+
+	navbar *elements.Nav
+}
+
+// NewNavBar creates new "nav" HTML element controlling structure.
+func NewNavBar(opts *NavBarOptions) *NavBar {
+	n := &NavBar{}
+	n.initialize(opts)
+
+	return n
+}
+
+// Build builds element and calls Build() for all child elements.
+func (n *NavBar) Build() *js.Object {
+	return n.navbar.Build()
+}
+
+// Initializes controlling structure.
+func (n *NavBar) initialize(opts *NavBarOptions) {
+	n.options = opts
+
+	navopts := &elements.NavOptions{
+		Class: "navbar",
+		Data:  map[string]string{},
+		Role:  "navigation",
+	}
+
+	n.navbar = elements.NewNav(navopts)
+
+	if n.options.IsDark {
+		n.navbar.AddClassesFromString("is-dark")
+	}
+
+	if n.options.Title != "" {
+		brandDiv := elements.NewDiv(&elements.DivOptions{
+			Class: "navbar-brand",
+		})
+
+		n.navbar.AddChild(brandDiv)
+
+		navMainLink := elements.NewA(&elements.AOptions{
+			Class: "navbar-item",
+			Href:  "//",
+			Text:  n.options.Title,
+		})
+
+		brandDiv.AddChild(navMainLink)
+	}
+}