From 9ef27203f009004f67c56ebe9bd84183758ed3be Mon Sep 17 00:00:00 2001
From: Zachary Yedidia <zyedidia@gmail.com>
Date: Thu, 16 Feb 2017 16:52:17 -0500
Subject: [PATCH] Add support for line numbers and cursor locations in the new
 view

---
 cmd/micro/view2.go | 83 ++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 80 insertions(+), 3 deletions(-)

diff --git a/cmd/micro/view2.go b/cmd/micro/view2.go
index db8c6b54..142088f0 100644
--- a/cmd/micro/view2.go
+++ b/cmd/micro/view2.go
@@ -19,6 +19,24 @@ func (v *View) DisplayView() {
 		v.lineNumOffset = 0
 	}
 
+	// We need to add to the line offset if there are gutter messages
+	var hasGutterMessages bool
+	for _, v := range v.messages {
+		if len(v) > 0 {
+			hasGutterMessages = true
+		}
+	}
+	if hasGutterMessages {
+		v.lineNumOffset += 2
+	}
+
+	if v.x != 0 {
+		// One space for the extra split divider
+		v.lineNumOffset++
+	}
+
+	xOffset := v.x + v.lineNumOffset
+
 	height := v.Height
 	width := v.Width
 	left := v.leftCol
@@ -26,10 +44,69 @@ func (v *View) DisplayView() {
 
 	v.cellview.Draw(v.Buf, top, height, left, width)
 
-	for _, line := range v.cellview.lines {
-		for _, char := range line {
+	screenX := v.x
+	for lineN, line := range v.cellview.lines {
+		screenX = v.x
+		curLineN := v.Topline + lineN
+
+		if v.x != 0 {
+			// Draw the split divider
+			screen.SetContent(screenX, lineN, '|', nil, defStyle.Reverse(true))
+			screenX++
+		}
+		lineNumStyle := defStyle
+		if v.Buf.Settings["ruler"] == true {
+			// Write the line number
+			if style, ok := colorscheme["line-number"]; ok {
+				lineNumStyle = style
+			}
+			if style, ok := colorscheme["current-line-number"]; ok {
+				if curLineN == v.Cursor.Y && tabs[curTab].CurView == v.Num && !v.Cursor.HasSelection() {
+					lineNumStyle = style
+				}
+			}
+
+			lineNum := strconv.Itoa(curLineN + 1)
+
+			// Write the spaces before the line number if necessary
+			for i := 0; i < maxLineNumLength-len(lineNum); i++ {
+				screen.SetContent(screenX, lineN, ' ', nil, lineNumStyle)
+				screenX++
+			}
+			// Write the actual line number
+			for _, ch := range lineNum {
+				screen.SetContent(screenX, lineN, ch, nil, lineNumStyle)
+				screenX++
+			}
+
+			// Write the extra space
+			screen.SetContent(screenX, lineN, ' ', nil, lineNumStyle)
+			screenX++
+		}
+
+		var lastChar *Char
+		for i, char := range line {
 			if char != nil {
-				screen.SetContent(char.visualLoc.X, char.visualLoc.Y, char.char, nil, char.style)
+				if tabs[curTab].CurView == v.Num && !v.Cursor.HasSelection() &&
+					v.Cursor.Y == char.realLoc.Y && v.Cursor.X == char.realLoc.X {
+					screen.ShowCursor(xOffset+char.visualLoc.X, char.visualLoc.Y)
+				}
+				screen.SetContent(xOffset+char.visualLoc.X, char.visualLoc.Y, char.char, nil, char.style)
+				if i == len(line)-1 {
+					lastChar = char
+				}
+			}
+		}
+
+		if lastChar != nil {
+			if tabs[curTab].CurView == v.Num && !v.Cursor.HasSelection() &&
+				v.Cursor.Y == lastChar.realLoc.Y && v.Cursor.X == lastChar.realLoc.X+1 {
+				screen.ShowCursor(xOffset+lastChar.visualLoc.X+1, lastChar.visualLoc.Y)
+			}
+		} else if len(line) == 0 {
+			if tabs[curTab].CurView == v.Num && !v.Cursor.HasSelection() &&
+				v.Cursor.Y == curLineN {
+				screen.ShowCursor(xOffset, lineN)
 			}
 		}
 	}