Renderer scaffolding

2 files changed, 92 insertions, 0 deletions

diff --git a/ui/render.go b/ui/render.go
new file mode 100644
index 00000000..bca0cf60
--- /dev/null
+++ b/ui/render.go
@@ -0,0 +1,45 @@
+package ui
+
+import (
+	tb "github.com/nsf/termbox-go"
+
+	"git.sr.ht/~sircmpwn/aerc2/config"
+)
+
+func Initialize(conf *config.AercConfig) (*UIState, error) {
+	state := UIState{
+		InvalidPanes: InvalidateAll,
+		Tabs:         make([]AercTab, len(conf.Accounts)),
+	}
+	// TODO: Initialize each tab to a mailbox tab
+	if err := tb.Init(); err != nil {
+		return nil, err
+	}
+	tb.SetInputMode(tb.InputEsc | tb.InputMouse)
+	tb.SetOutputMode(tb.Output256)
+	return &state, nil
+}
+
+func (state *UIState) Close() {
+	tb.Close()
+}
+
+func (state *UIState) Invalidate(what uint) {
+	state.InvalidPanes |= what
+}
+
+func (state *UIState) Tick() bool {
+	switch e := tb.PollEvent(); e.Type {
+	case tb.EventKey:
+		if e.Key == tb.KeyEsc {
+			state.Exit = true
+		}
+	case tb.EventResize:
+		state.Invalidate(InvalidateAll)
+	}
+	if state.InvalidPanes != 0 {
+		// TODO: re-render
+		state.InvalidPanes = 0
+	}
+	return true
+}
diff --git a/ui/types.go b/ui/types.go
new file mode 100644
index 00000000..a7918b5b
--- /dev/null
+++ b/ui/types.go
@@ -0,0 +1,47 @@
+package ui
+
+const (
+	Valid          = 0
+	InvalidateTabs = 1 << iota
+	InvalidateSidebar
+	InvalidateStatusBar
+)
+
+const (
+	InvalidateAll = InvalidateTabs | InvalidateSidebar | InvalidateStatusBar
+)
+
+type Geometry struct {
+	row    int
+	col    int
+	width  int
+	height int
+}
+
+type AercTab interface {
+	Name() string
+	Invalid() bool
+	Render(at Geometry)
+}
+
+type UIState struct {
+	Exit         bool
+	InvalidPanes uint
+
+	Panes struct {
+		TabList   Geometry
+		TabView   Geometry
+		Sidebar   Geometry
+		StatusBar Geometry
+	}
+
+	Tabs        []AercTab
+	SelectedTab int
+
+	Prompt struct {
+		Prompt *string
+		Text   *string
+		Index  int
+		Scroll int
+	}
+}