From 5b91fe424ee7358367f998af8c1903362f9e2abd Mon Sep 17 00:00:00 2001
From: tomsmeding <tom.smeding@gmail.com>
Date: Mon, 9 Jan 2017 13:52:11 +0100
Subject: Bugfixing

---
 buffer.cpp | 35 ++++++++++++++++++++++++++---------
 1 file changed, 26 insertions(+), 9 deletions(-)

(limited to 'buffer.cpp')

diff --git a/buffer.cpp b/buffer.cpp
index e32492b..2123de1 100644
--- a/buffer.cpp
+++ b/buffer.cpp
@@ -2,6 +2,7 @@
 #include <fstream>
 #include <cassert>
 #include <cmath>
+#include <cinttypes>
 #include <termio.h>
 
 #include "buffer.h"
@@ -46,12 +47,11 @@ static string showChar(char c){
 	        "0123456789abcdef"[(unsigned char)c%16]};
 }
 
-/*static i64 charWidth(char c){
-	return showChar(c).size();
-}*/
-
 vector<Buffer::ScreenLine> Buffer::layoutLine(const string &line,i64 linenum,i64 width){
 	assert(width>=4);
+	if(line.size()==0){
+		return {{linenum,0,0,{}}};
+	}
 	vector<ScreenLine> layout;
 	vector<Cell> cur;
 	i64 x=0;
@@ -67,7 +67,7 @@ vector<Buffer::ScreenLine> Buffer::layoutLine(const string &line,i64 linenum,i64
 			fromx=i;
 			x=0;
 		}
-		Cell cell={'\0',repr.size()!=1};
+		Cell cell={'\0',repr.size()!=1,i};
 		for(char rc : repr){
 			cell.c=rc;
 			cur.push_back(cell);
@@ -95,7 +95,7 @@ void Buffer::performInitialLayout(i64 width,i64 height){
 	//Layout the line the cursor is on.
 	screen=layoutLine(tb[cursor.line],cursor.line,width);
 	i64 cursorScreenY=0;
-	while(cursorScreenY+1<(i64)screen.size()&&screen[cursorScreenY+1].fromx>cursor.x){
+	while(cursorScreenY+1<(i64)screen.size()&&screen[cursorScreenY+1].fromx<=cursor.x){
 		cursorScreenY++;
 	}
 
@@ -125,9 +125,10 @@ void Buffer::performInitialLayout(i64 width,i64 height){
 	while(bottomLine<tb.numLines()&&(i64)screen.size()<height){
 		vector<ScreenLine> layout=layoutLine(tb[bottomLine],bottomLine,width);
 		screen.insert(screen.end(),layout.begin(),layout.end());
+		// cerr<<"Added bottomLine="<<bottomLine<<" (tb.numLines()="<<tb.numLines()<<")"<<endl;
 		bottomLine++;
 	}
-	if((i64)screen.size()<height){
+	if((i64)screen.size()>height){
 		//Oops, we overran a bit. Prune the end so that we fill the screen exactly.
 		screen.resize(height);
 	} else if((i64)screen.size()<height){
@@ -170,7 +171,7 @@ void Buffer::renewLayout(i64 topLine,i64 topPart,i64 width,i64 height){
 	i64 bottomLine=topLine+1;
 	while(bottomLine<tb.numLines()&&(i64)screen.size()<height){
 		vector<ScreenLine> layout=layoutLine(tb[bottomLine],bottomLine,width);
-		screen.insert(screen.begin(),layout.begin(),layout.end());
+		screen.insert(screen.end(),layout.begin(),layout.end());
 		bottomLine++;
 	}
 
@@ -198,8 +199,14 @@ void Buffer::show(i64 atx,i64 aty,i64 width,i64 height){
 		lastWidth=newWidth;
 		lastHeight=height;
 	}
+
+	setstyle(&textStyle);
+	fillrect(atx,aty,width,height,' ');
+
 	pushcursor();
 	i64 y;
+	i64 curScreenX=-1,curScreenY=-1;
+	// cerr<<"Buffer::show: screen.size()="<<screen.size()<<endl;
 	for(y=0;y<(i64)screen.size();y++){
 		moveto(atx,aty+y);
 		setstyle(&gutterStyle);
@@ -207,15 +214,25 @@ void Buffer::show(i64 atx,i64 aty,i64 width,i64 height){
 		for(i64 i=0;i<nspaces;i++){
 			tputc(' ');
 		}
-		tprintf("%lld ",screen[y].line+1);
+		tprintf("%" PRIi64 " ",screen[y].line+1);
 
+		i64 screenX=atx+gutterWidth;
 		setstyle(&textStyle);
 		for(const Cell &cell : screen[y].cells){
 			if(cell.special)setstyle(&specialStyle);
 			else setstyle(&textStyle);
 			tputc(cell.c);
+			if(curScreenX==-1&&cell.linex==cursor.x&&screen[y].line==cursor.line){
+				curScreenX=screenX;
+				curScreenY=aty+y;
+			}
+			screenX++;
 		}
 	}
 	setstyle(&textStyle);
 	if(y<height)fillrect(atx,aty+y,width,height-y,' ');
+	popcursor();
+	if(curScreenX!=-1){
+		moveto(curScreenX,curScreenY);
+	}
 }
-- 
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