From 032a83d70bec5b87605e04c755c678ec01a0de11 Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Fri, 21 Feb 2020 00:29:29 +0200
Subject: Add initial message selecting stuff

---
 ui/message-view.go  | 29 ++++++++++++++++++++---------
 ui/messages/base.go | 13 +++++++++++++
 2 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/ui/message-view.go b/ui/message-view.go
index 20ee149..e079407 100644
--- a/ui/message-view.go
+++ b/ui/message-view.go
@@ -64,6 +64,7 @@ type MessageView struct {
 	messages      []*messages.UIMessage
 	msgBufferLock sync.RWMutex
 	msgBuffer     []*messages.UIMessage
+	selected      *messages.UIMessage
 
 	initialHistoryLoaded bool
 }
@@ -286,12 +287,12 @@ func (view *MessageView) replaceBuffer(original *messages.UIMessage, new *messag
 	if new.Height() != end-start {
 		height := new.Height()
 
-		newBuffer := make([]*messages.UIMessage, height + len(view.msgBuffer) - end)
+		newBuffer := make([]*messages.UIMessage, height+len(view.msgBuffer)-end)
 		for i := 0; i < height; i++ {
 			newBuffer[i] = new
 		}
 		for i := height; i < len(newBuffer); i++ {
-			newBuffer[i] = view.msgBuffer[end + (i - height)]
+			newBuffer[i] = view.msgBuffer[end+(i-height)]
 		}
 		view.msgBuffer = append(view.msgBuffer[0:start], newBuffer...)
 	} else {
@@ -333,14 +334,24 @@ func (view *MessageView) recalculateBuffers() {
 	view.prevPrefs = prefs
 }
 
-func (view *MessageView) handleMessageClick(message *messages.UIMessage) bool {
-	switch msg := message.Renderer.(type) {
-	case *messages.ImageMessage:
+func (view *MessageView) SetSelected(message *messages.UIMessage) {
+	if view.selected != nil {
+		view.selected.IsSelected = false
+	}
+	view.selected = message
+	if view.selected != nil {
+		view.selected.IsSelected = true
+	}
+}
+
+func (view *MessageView) handleMessageClick(message *messages.UIMessage, mod tcell.ModMask) bool {
+	if msg, ok := message.Renderer.(*messages.ImageMessage); ok && mod > 0 {
 		open.Open(msg.Path())
-	default:
-		debug.Print("Message clicked:", message)
+		// No need to re-render
+		return false
 	}
-	return false
+	view.SetSelected(message)
+	return true
 }
 
 func (view *MessageView) handleUsernameClick(message *messages.UIMessage, prevMessage *messages.UIMessage) bool {
@@ -410,7 +421,7 @@ func (view *MessageView) OnMouseEvent(event mauview.MouseEvent) bool {
 		messageX := usernameX + view.widestSender() + SenderMessageGap
 
 		if x >= messageX {
-			return view.handleMessageClick(message)
+			return view.handleMessageClick(message, event.Modifiers())
 		} else if x >= usernameX {
 			return view.handleUsernameClick(message, prevMessage)
 		}
diff --git a/ui/messages/base.go b/ui/messages/base.go
index 0c9025e..4d82b00 100644
--- a/ui/messages/base.go
+++ b/ui/messages/base.go
@@ -77,6 +77,7 @@ type UIMessage struct {
 	State              event.OutgoingState
 	IsHighlight        bool
 	IsService          bool
+	IsSelected         bool
 	Edited             bool
 	Event              *event.Event
 	ReplyTo            *UIMessage
@@ -316,6 +317,18 @@ func (msg *UIMessage) Draw(screen mauview.Screen) {
 	screen = msg.DrawReply(screen)
 	msg.Renderer.Draw(screen)
 	msg.DrawReactions(screen)
+	if msg.IsSelected {
+		w, h := screen.Size()
+		for x := 0; x < w; x++ {
+			for y := 0; y < h; y++ {
+				mainc, combc, style, _ := screen.GetContent(x, y)
+				_, bg, _ := style.Decompose()
+				if bg == tcell.ColorDefault {
+					screen.SetContent(x, y, mainc, combc, style.Background(tcell.ColorLightSkyBlue))
+				}
+			}
+		}
+	}
 }
 
 func (msg *UIMessage) Clone() *UIMessage {
-- 
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