Begin tab implementation

cmd/micro/action/tab.go

@@ -8,30 +8,102 @@ import (
 	"github.com/zyedidia/tcell"
 )
 
-var MainTab *TabPane
+type TabList struct {
+	*display.TabWindow
+	List   []*TabPane
+	Active int
+}
 
+func NewTabList(bufs []*buffer.Buffer) *TabList {
+	w, h := screen.Screen.Size()
+	tl := new(TabList)
+	tl.List = make([]*TabPane, len(bufs))
+	if len(bufs) > 1 {
+		for i, b := range bufs {
+			tl.List[i] = NewTabPane(0, 1, w, h-2, b)
+		}
+	} else {
+		tl.List[0] = NewTabPane(0, 0, w, h-1, bufs[0])
+	}
+	tl.TabWindow = display.NewTabWindow(w, 0)
+	tl.Names = make([]string, len(bufs))
+	tl.UpdateNames()
+
+	return tl
+}
+
+func (t *TabList) UpdateNames() {
+	t.Names = t.Names[:0]
+	for _, p := range t.List {
+		t.Names = append(t.Names, p.Panes[p.active].Buf.GetName())
+	}
+}
+
+func (t *TabList) HandleEvent(event tcell.Event) {
+	switch e := event.(type) {
+	case *tcell.EventResize:
+		w, h := screen.Screen.Size()
+		InfoBar.Resize(w, h-1)
+		if len(t.List) > 1 {
+			for _, p := range t.List {
+				p.Node.Resize(w, h-2)
+				p.Resize()
+			}
+		} else {
+			t.List[0].Node.Resize(w, h-2)
+			t.List[0].Resize()
+		}
+	case *tcell.EventMouse:
+		switch e.Buttons() {
+		case tcell.Button1:
+		}
+
+	}
+	t.List[t.Active].HandleEvent(event)
+}
+
+func (t *TabList) Display() {
+	if len(t.List) > 1 {
+		t.TabWindow.Display()
+	}
+}
+
+var Tabs *TabList
+
+func InitTabs(bufs []*buffer.Buffer) {
+	Tabs = NewTabList(bufs)
+}
+
+func MainTab() *TabPane {
+	return Tabs.List[Tabs.Active]
+}
+
+// A TabPane represents a single tab
+// It consists of a list of edit panes (the open buffers),
+// a split tree (stored as just the root node), and a uiwindow
+// to display the UI elements like the borders between splits
 type TabPane struct {
 	*views.Node
-	display.Window
+	*display.UIWindow
 	Panes  []*EditPane
 	active int
 
 	resizing *views.Node // node currently being resized
 }
 
+// HandleEvent takes a tcell event and usually dispatches it to the current
+// active pane. However if the event is a resize or a mouse event where the user
+// is interacting with the UI (resizing splits) then the event is consumed here
+// If the event is a mouse event in a pane, that pane will become active and get
+// the event
 func (t *TabPane) HandleEvent(event tcell.Event) {
 	switch e := event.(type) {
-	case *tcell.EventResize:
-		w, h := screen.Screen.Size()
-		InfoBar.Resize(w, h-1)
-		t.Node.Resize(w, h-1)
-		t.Resize()
 	case *tcell.EventMouse:
 		switch e.Buttons() {
 		case tcell.Button1:
 			mx, my := e.Position()
 
-			resizeID := t.GetMouseLoc(buffer.Loc{mx, my}).X
+			resizeID := t.GetMouseSplitID(buffer.Loc{mx, my})
 			if t.resizing != nil {
 				var size int
 				if t.resizing.Kind == views.STVert {
@@ -44,7 +116,7 @@ func (t *TabPane) HandleEvent(event tcell.Event) {
 				return
 			}
 
-			if resizeID != -1 {
+			if resizeID != 0 {
 				t.resizing = t.GetNode(uint64(resizeID))
 				return
 			}
@@ -67,6 +139,7 @@ func (t *TabPane) HandleEvent(event tcell.Event) {
 	t.Panes[t.active].HandleEvent(event)
 }
 
+// SetActive changes the currently active pane to the specified index
 func (t *TabPane) SetActive(i int) {
 	t.active = i
 	for j, p := range t.Panes {
@@ -78,6 +151,7 @@ func (t *TabPane) SetActive(i int) {
 	}
 }
 
+// GetPane returns the pane with the given split index
 func (t *TabPane) GetPane(splitid uint64) int {
 	for i, p := range t.Panes {
 		if p.splitID == splitid {
@@ -87,12 +161,14 @@ func (t *TabPane) GetPane(splitid uint64) int {
 	return 0
 }
 
+// Remove pane removes the pane with the given index
 func (t *TabPane) RemovePane(i int) {
 	copy(t.Panes[i:], t.Panes[i+1:])
 	t.Panes[len(t.Panes)-1] = nil // or the zero value of T
 	t.Panes = t.Panes[:len(t.Panes)-1]
 }
 
+// Resize resizes all panes according to their corresponding split nodes
 func (t *TabPane) Resize() {
 	for i, p := range t.Panes {
 		n := t.GetNode(p.splitID)
@@ -107,6 +183,7 @@ func (t *TabPane) Resize() {
 	}
 }
 
+// CurPane returns the currently active pane
 func (t *TabPane) CurPane() *EditPane {
 	return t.Panes[t.active]
 }