more support for command log and more code reuse for contexts

pkg/gui/basic_context.go

@@ -0,0 +1,77 @@
+package gui
+
+type BasicContext struct {
+	OnFocus         func() error
+	OnFocusLost     func() error
+	OnRender        func() error
+	Kind            ContextKind
+	Key             ContextKey
+	ViewName        string
+	WindowName      string
+	OnGetOptionsMap func() map[string]string
+
+	ParentContext Context
+	// we can't know on the calling end whether a Context is actually a nil value without reflection, so we're storing this flag here to tell us. There has got to be a better way around this
+	hasParent bool
+}
+
+func (c *BasicContext) GetOptionsMap() map[string]string {
+	if c.OnGetOptionsMap != nil {
+		return c.OnGetOptionsMap()
+	}
+	return nil
+}
+
+func (c *BasicContext) SetParentContext(context Context) {
+	c.ParentContext = context
+	c.hasParent = true
+}
+
+func (c *BasicContext) GetParentContext() (Context, bool) {
+	return c.ParentContext, c.hasParent
+}
+
+func (c *BasicContext) SetWindowName(windowName string) {
+	c.WindowName = windowName
+}
+
+func (c *BasicContext) GetWindowName() string {
+	windowName := c.WindowName
+
+	if windowName != "" {
+		return windowName
+	}
+
+	// TODO: actually set this for everything so we don't default to the view name
+	return c.ViewName
+}
+
+func (c *BasicContext) HandleRender() error {
+	if c.OnRender != nil {
+		return c.OnRender()
+	}
+	return nil
+}
+
+func (c *BasicContext) GetViewName() string {
+	return c.ViewName
+}
+
+func (c *BasicContext) HandleFocus() error {
+	return c.OnFocus()
+}
+
+func (c *BasicContext) HandleFocusLost() error {
+	if c.OnFocusLost != nil {
+		return c.OnFocusLost()
+	}
+	return nil
+}
+
+func (c *BasicContext) GetKind() ContextKind {
+	return c.Kind
+}
+
+func (c *BasicContext) GetKey() ContextKey {
+	return c.Key
+}