Restrucure project in a way where it is more modular

pkg/gui/panels/commit_message_panel.go

@@ -0,0 +1,45 @@
+package main
+
+import "github.com/jesseduffield/gocui"
+
+func handleCommitConfirm(g *gocui.Gui, v *gocui.View) error {
+	message := trimmedContent(v)
+	if message == "" {
+		return createErrorPanel(g, "You cannot commit without a commit message")
+	}
+	if output, err := gitCommit(g, message); err != nil {
+		if err == errNoUsername {
+			return createErrorPanel(g, err.Error())
+		}
+		return createErrorPanel(g, output)
+	}
+	refreshFiles(g)
+	v.Clear()
+	v.SetCursor(0, 0)
+	g.SetViewOnBottom("commitMessage")
+	switchFocus(g, v, getFilesView(g))
+	return refreshCommits(g)
+}
+
+func handleCommitClose(g *gocui.Gui, v *gocui.View) error {
+	g.SetViewOnBottom("commitMessage")
+	return switchFocus(g, v, getFilesView(g))
+}
+
+func handleNewlineCommitMessage(g *gocui.Gui, v *gocui.View) error {
+	// resising ahead of time so that the top line doesn't get hidden to make
+	// room for the cursor on the second line
+	x0, y0, x1, y1 := getConfirmationPanelDimensions(g, v.Buffer())
+	if _, err := g.SetView("commitMessage", x0, y0, x1, y1+1, 0); err != nil {
+		if err != gocui.ErrUnknownView {
+			return err
+		}
+	}
+
+	v.EditNewLine()
+	return nil
+}
+
+func handleCommitFocused(g *gocui.Gui, v *gocui.View) error {
+	return renderString(g, "options", "esc: close, enter: confirm")
+}