add message support to the game client

2 files changed, 72 insertions, 11 deletions

diff --git a/go/client/game.go b/go/client/game.go
index f726c95d..dd8a9b39 100644
--- a/go/client/game.go
+++ b/go/client/game.go
@@ -18,8 +18,13 @@ const (
 	DEFAULT_BUTTON_HEIGHT = 40
 	PASS_BUTTON_WIDTH     = 100
 
-	RESOLVE_BUTTON_X   = 500
-	STACK_BUFFER_WIDTH = 300
+	RESOLVE_BUTTON_X = 500
+
+	STACK_BUFFER_WIDTH  = 300
+	STACK_BUFFER_HEIGHT = 400
+
+	MESSAGE_BUFFER_HEIGHT = 200
+	MESSAGE_BUFFER_MARGIN = 10
 
 	HOVER_THRESHOLD = 60
 
@@ -52,6 +57,7 @@ type Game struct {
 	storeButton       *ui.SimpleButton
 	stackBuffer       *ui.Buffer
 	prompt            *ui.Prompt
+	messageBuffer     *ui.Buffer
 	triggers          []*game.TriggeredAction
 	ui.Collection
 
@@ -90,7 +96,9 @@ func newGame(app *app, gameState game.State) *Game {
 		DEFAULT_BUTTON_HEIGHT,
 		"Pass",
 		func(*ui.SimpleButton) {
-			if g.prompt != nil {
+			if g.visible(g.messageBuffer) {
+				g.hide(g.messageBuffer)
+			} else if g.prompt != nil {
 				g.progressPrompt()
 			} else if g.hasPriority {
 				g.passPriority()
@@ -106,8 +114,16 @@ func newGame(app *app, gameState game.State) *Game {
 			g.reset()
 		})
 
-	g.stackBuffer = ui.NewBuffer(g.Width-STACK_BUFFER_WIDTH, g.passButton.Y-400,
-		STACK_BUFFER_WIDTH, 400)
+	g.stackBuffer = ui.NewBuffer(
+		g.Width-STACK_BUFFER_WIDTH, g.passButton.Y-400,
+		STACK_BUFFER_WIDTH, STACK_BUFFER_HEIGHT)
+
+	g.messageBuffer = ui.NewBuffer(
+		MESSAGE_BUFFER_MARGIN,
+		g.Height-DEFAULT_BUTTON_HEIGHT-MESSAGE_BUFFER_HEIGHT-MESSAGE_BUFFER_MARGIN,
+		g.Width-2*MESSAGE_BUFFER_MARGIN,
+		MESSAGE_BUFFER_HEIGHT,
+	)
 	return g
 }
 
@@ -168,7 +184,7 @@ func (g *Game) initPlayerUi(player *game.Player) *Game {
 		DEFAULT_BUTTON_HEIGHT,
 		"DiscardPile",
 		func(*ui.SimpleButton) {
-			if idx := g.FindWidget(g.discardPileView); idx == -1 {
+			if !g.visible(g.discardPileView) {
 				g.discardPileView.ForceRedraw()
 				g.AddWidget(g.discardPileView)
 			} else {
@@ -235,6 +251,20 @@ func (g *Game) hideStore() {
 	g.RemoveWidget(g.storeView)
 }
 
+func (g *Game) showMessage(message string) {
+	g.messageBuffer.ClearLines()
+	g.messageBuffer.Bg(color.RGBA{0x80, 0x80, 0x80, 0x80})
+	g.messageBuffer.AddText(message)
+	g.show(g.messageBuffer)
+}
+
+func (g *Game) showError(message string) {
+	g.messageBuffer.ClearLines()
+	g.messageBuffer.Bg(color.RGBA{0xe0, 0x10, 0x10, 0x80})
+	g.messageBuffer.AddText(message)
+	g.show(g.messageBuffer)
+}
+
 func (g *Game) addPermActionChoice(perm game.Permanent, x, y int) {
 	if len(perm.Pile()) == 0 {
 		g.addActionChoice(perm, x, y)
@@ -418,6 +448,10 @@ func (g *Game) declareAction(a game.Action) {
 	g.stateBar.ForceRedraw()
 }
 
+func (g *Game) visible(w ui.Widget) bool {
+	return g.FindWidget(w) != -1
+}
+
 // show ensures a widget is visible by adding it to the collection or moving it to the last position.
 func (g *Game) show(w ui.Widget) {
 	idx := g.FindWidget(w)
@@ -429,7 +463,7 @@ func (g *Game) show(w ui.Widget) {
 }
 
 func (g *Game) hide(w ui.Widget) {
-	g.RemoveWidget(g.passButton)
+	g.RemoveWidget(w)
 }
 
 func (g *Game) updateButtons() {
@@ -503,7 +537,7 @@ func (g *Game) handlePlayerNotifications() {
 			}
 			a := n.Context.(game.Action)
 			g.stackBuffer.AddLine(a.String())
-			if !g.gameState.Stack().IsEmpty() && g.FindWidget(g.stackBuffer) == -1 {
+			if !g.gameState.Stack().IsEmpty() && !g.visible(g.stackBuffer) {
 				g.AddWidget(g.stackBuffer)
 			}
 
diff --git a/go/ui/buffer.go b/go/ui/buffer.go
index 8294c905..7a69766d 100644
--- a/go/ui/buffer.go
+++ b/go/ui/buffer.go
@@ -22,17 +22,28 @@ type Buffer struct {
 	font        *text.GoTextFace
 	lineSpacing float64
 	xMargin     float64
+	bg color.Color
+	fg color.Color
 }
 
 func NewBuffer(x, y int, width, height int) *Buffer {
-	b := &Buffer{NewWidgetBase(x, y, width, height), []string{}, 0, font.Font18, 1.5, 10.}
+	b := &Buffer{
+		NewWidgetBase(x, y, width, height),
+		[]string{},
+		0,
+		font.Font18,
+		1.5,
+		10.,
+		BUFFER_BACKGROUND,
+		BUFFER_FOREGROUND,
+	}
 	b.renderImpl = func() *ebiten.Image { return b.render() }
 	return b
 }
 
 func (b *Buffer) render() *ebiten.Image {
 	img := ebiten.NewImage(b.Width, b.Height)
-	img.Fill(BUFFER_BACKGROUND)
+	img.Fill(b.bg)
 	var y float64 = -b.font.Size
 	for _, line := range b.lines[b.pos:] {
 		_, h := text.Measure(line, b.font, b.font.Size*b.lineSpacing)
@@ -41,7 +52,7 @@ func (b *Buffer) render() *ebiten.Image {
 			break
 		}
 		op := &text.DrawOptions{}
-		op.ColorScale.ScaleWithColor(BUFFER_FOREGROUND)
+		op.ColorScale.ScaleWithColor(b.fg)
 		op.GeoM.Translate(b.xMargin, float64(y))
 		op.LineSpacing = b.font.Size * b.lineSpacing
 		text.Draw(img, line, b.font, op)
@@ -58,6 +69,12 @@ func (b *Buffer) AddLine(line string) {
 	b.AddLines([]string{line})
 }
 
+func (b *Buffer) AddText(text string) {
+	// TODO: auto break text
+	lines := []string{text}
+	b.AddLines(lines)
+}
+
 func (b *Buffer) ClearLines() {
 	b.lines = []string{}
 	b.ForceRedraw()
@@ -102,3 +119,13 @@ func (b *Buffer) Scroll(x, y int) {
 	}
 	b.ForceRedraw()
 }
+
+func (b *Buffer) Bg(bg color.Color) *Buffer {
+	b.bg = bg
+	return b
+}
+
+func (b *Buffer) Fg(fg color.Color) *Buffer {
+	b.fg = fg
+	return b
+}