xC/xP: support hiding unimportant messages at all

xP/public/xP.js

@@ -171,6 +171,7 @@ rpc.addEventListener('BufferUpdate', event => {
 		buffers.set(e.bufferName, (b = {lines: []}))
 		resetBufferStats(b)
 	}
+	b.hideUnimportant = e.hideUnimportant
 })
 
 rpc.addEventListener('BufferStats', event => {
@@ -465,6 +466,11 @@ let Buffer = {
 		let markBefore = b.lines.length
 			- b.newMessages - b.newUnimportantMessages
 		b.lines.forEach((line, i) => {
+			if (i == markBefore)
+				lines.push(m('.unread'))
+			if (line.isUnimportant && b.hideUnimportant)
+				return
+
 			let date = new Date(line.when)
 			let dateMark = date.toLocaleDateString()
 			if (dateMark !== lastDateMark) {
@@ -472,14 +478,10 @@ let Buffer = {
 				lastDateMark = dateMark
 			}
 
-			if (i == markBefore)
-				lines.push(m('.unread'))
-
 			let attrs = {}
 			if (line.leaked)
 				attrs.class = 'leaked'
 
-			// TODO: Make use of isUnimportant.
 			lines.push(m('.time', {...attrs}, date.toLocaleTimeString()))
 			lines.push(m(Content, {...attrs}, line))
 		})
@@ -604,6 +606,7 @@ let Main = {
 		return m('.xP', {}, [
 			m('.title', {}, [`xP (${state})`, m(Toolbar)]),
 			m('.middle', {}, [m(BufferList), m(BufferContainer)]),
+			// TODO: Indicate hideUnimportant.
 			m('.status', {}, bufferCurrent),
 			m(Input),
 		])