Recieving of formatted messages (by font-face)

Now addons can format messages with new slots accepted by
IM_MESSAGE_RECEIVED: "face_start," "face_length," and "face".

The first two deal with the position of the face-change by character
offset in the string, and the last being the face flag affected.

application/ChatProtocolMessages.h

@@ -75,8 +75,12 @@ enum im_what_code {
 		printed in chat.
 		If chat_id is ommitted, the message is sent to the protocol's system
 		buffer, rather than a specific conversation.
+		face_start and face_length specify the location of formatted text in
+		the body, and "face" is the desired font face. Unsupported in bulk,
+		i.e., IM_LOGS_RECEIVED.
 		Requires:	String "body"
-		Allows:		String "chat_id", String "user_id", String "user_name" */
+		Allows:		String "chat_id", String "user_id", String "user_name",
+					int32s "face_start", int32s "face_length", uint16s "face" */
 	IM_MESSAGE_RECEIVED					= 22,
 
 	/*!	Logs received					→App

application/views/ConversationView.cpp

@@ -418,6 +418,12 @@ ConversationView::_AppendMessage(BMessage* msg)
 	}
 
 	// … else we're jamming a message into this view no matter what it takes!
+	if (msg->HasInt32("face_start") == true) {
+		_AppendFormattedMessage(msg);
+		return;
+	}
+
+	// For unformatted (normal or bulk) messages
 	BStringList user_ids, user_names, bodies;
 	if (msg->FindStrings("body", &bodies) != B_OK)
 		return;
@@ -464,6 +470,115 @@ ConversationView::_AppendMessage(BMessage* msg)
 }
 
 
+void
+ConversationView::_AppendFormattedMessage(BMessage* msg)
+{
+	int64 timeInt;
+	BString user_id;
+	BString user_name;
+	BString body;
+	rgb_color userColor = ui_color(B_PANEL_TEXT_COLOR);
+
+	if (msg->FindString("body", &body) != B_OK)
+		return;
+
+	if (msg->FindInt64("when", &timeInt) != B_OK)
+		timeInt = (int64)time(NULL);
+
+	if (msg->FindString("user_id", &user_id) == B_OK)
+		if (fConversation != NULL) {
+			User* user = fConversation->UserById(user_id);
+			if (user != NULL) {
+				user_name = user->GetName();
+				userColor = user->fItemColor;
+			}
+			else
+				user_name = user_id;
+		}
+	else if (msg->FindString("user_name", &user_name) != B_OK) {
+		fReceiveView->AppendGeneric(body);
+		return;
+	}
+
+	fReceiveView->AppendTimestamp(timeInt);
+	fReceiveView->AppendUserstamp(user_name, userColor);
+
+	// And here we append the body…
+	uint16 face = 0;
+	UInt16IntMap face_indices;
+	rgb_color color = ui_color(B_PANEL_TEXT_COLOR);
+
+	BFont font;
+	for (int i = 0; i < body.CountChars(); i++) {
+		_EnableStartingFaces(msg, i, &face, &face_indices);
+
+		if (face == B_REGULAR_FACE) {
+			font = BFont();
+			face = 0;
+		}
+		else if (face > 0) {
+			font.SetFace(face);
+		}
+
+		int32 bytes;
+		const char* curChar = body.CharAt(i, &bytes);
+		char append[bytes];
+
+		for (int i = 0; i < bytes; i++)
+			append[i] = curChar[i];
+		append[bytes] = '\0';
+		fReceiveView->Append(append, color, &font);
+
+		_DisableEndingFaces(msg, &face, &face_indices);
+	}
+	fReceiveView->Append("\n");
+}
+
+
+void
+ConversationView::_EnableStartingFaces(BMessage* msg, int32 index, uint16* face,
+	UInt16IntMap* indices)
+{
+	int32 face_start;
+	int32 face_length;
+	uint16 newFace;
+
+	int32 i = 0;
+	while (msg->FindInt32("face_start", i, &face_start) == B_OK) {
+		if (face_start == index) {
+			if (msg->FindInt32("face_length", i, &face_length) != B_OK)
+				continue;
+			if (msg->FindUInt16("face", i, &newFace) != B_OK)
+				continue;
+
+			*face |= newFace;
+			indices->AddItem(newFace, face_length);
+		}
+		i++;
+	}
+}
+
+
+void
+ConversationView::_DisableEndingFaces(BMessage* msg, uint16* face,
+	UInt16IntMap* indices)
+{
+	for (int32 i = 0; i < indices->CountItems(); i++) {
+		uint16 key = indices->KeyAt(i);
+		int32 value = indices->ValueAt(i) - 1;
+
+		indices->RemoveItemAt(i);
+		if (value <= 0) {
+			*face = *face & ~key;
+			if (indices->CountItems() == 0)
+				*face = B_REGULAR_FACE;
+		}
+		else
+			indices->AddItem(key, value);
+	}
+}
+
+
 void
 ConversationView::_UserMessage(const char* format, const char* bodyFormat,
 	BMessage* msg)

application/views/ConversationView.h

@@ -26,6 +26,8 @@ class UserListView;
 
 const uint32 kClearText = 'CVct';
 
+typedef KeyMap<uint16, int32> UInt16IntMap;
+
 
 class ConversationView : public BGroupView, public Observer, public Notifier {
 public:
@@ -55,6 +57,13 @@ private:
 
 			bool		_AppendOrEnqueueMessage(BMessage* msg);
 			void		_AppendMessage(BMessage* msg);
+			void		_AppendFormattedMessage(BMessage* msg);
+
+			// Helper functions for _AppendFormattedMessage()
+			void		_EnableStartingFaces(BMessage* msg, int32 index,
+							uint16* face, UInt16IntMap* indices);
+			void		_DisableEndingFaces(BMessage* msg, uint16* face,
+							UInt16IntMap* indices);
 
 			void		_UserMessage(const char* format, const char* bodyFormat,
 									 BMessage* msg);

application/views/RenderView.cpp

@@ -24,9 +24,7 @@ RenderView::AppendMessage(const char* nick, const char* message,
 	if (BString(message).IsEmpty() == true)	return;
 
 	AppendTimestamp(time);
-	Append("<", nameColor);
-	Append(nick);
-	Append("> ", nameColor);
+	AppendUserstamp(nick, nameColor);
 	Append(message);
 
 	if (BString(message).EndsWith("\n") == false)	Append("\n");
@@ -43,6 +41,15 @@ RenderView::AppendGeneric(const char* message)
 }
 
 
+void
+RenderView::AppendUserstamp(const char* nick, rgb_color nameColor)
+{
+	Append("<", nameColor, B_BOLD_FACE);
+	Append(nick, nameColor, B_BOLD_FACE);
+	Append("> ", nameColor, B_BOLD_FACE);
+}
+
+
 void
 RenderView::AppendTimestamp(time_t time)
 {
@@ -55,17 +62,18 @@ RenderView::AppendTimestamp(time_t time)
 		BString stamp("――― %date% ―――\n");
 		stamp.ReplaceAll("%date%", datestamp);
 
-		Append(stamp.String(), ui_color(B_PANEL_TEXT_COLOR), B_ITALIC_FACE);
+		Append(stamp.String(), ui_color(B_PANEL_TEXT_COLOR),
+			B_ITALIC_FACE | B_BOLD_FACE);
 
 		fLastDay = tm->tm_yday;
 		fLastYear = tm->tm_year;
 	}
 
 	if (time == 0) {
-		Append("[xx:xx] ", ui_color(B_LINK_HOVER_COLOR));
+		Append("[xx:xx] ", ui_color(B_LINK_HOVER_COLOR), B_BOLD_FACE);
 		return;
 	}
 	char timestamp[9] = { '\0' };
 	strftime(timestamp, 8, "[%H:%M] ", tm);
-	Append(timestamp, ui_color(B_LINK_HOVER_COLOR));
+	Append(timestamp, ui_color(B_LINK_HOVER_COLOR), B_BOLD_FACE);
 }

application/views/RenderView.h

@@ -15,6 +15,7 @@ public:
 		void	AppendMessage(const char* nick, const char* message,
 							  rgb_color nameColor, time_t time = 0);
 		void	AppendGeneric(const char* message);
+		void	AppendUserstamp(const char* nick, rgb_color nameColor);
 		void	AppendTimestamp(time_t time = 0);
 
 private: