From 2452633e322969424872a8f8ebef4b47007f0966 Mon Sep 17 00:00:00 2001
From: prod2 <prod2@norlang.art>
Date: Thu, 29 Dec 2022 19:01:34 +0100
Subject: [PATCH] multiple lines scrolling together horizontally

---
 renderer.nim | 30 +++++++++++++-----------------
 1 file changed, 13 insertions(+), 17 deletions(-)

diff --git a/renderer.nim b/renderer.nim
index 73db68c..4ae3f59 100644
--- a/renderer.nim
+++ b/renderer.nim
@@ -37,6 +37,15 @@ proc render*(textBuffer: TextBuffer, termBuffer: Buffer, prompt: string, scroll:
     termBuffer.redraw()
     return # nothing will fit anyways
 
+  const scrollOffset = 2
+  # right scroll
+  if x - scroll.x >= maxTextLen - scrollOffset:
+    scroll.x = x - maxTextLen + scrollOffset
+  # left scroll
+  if x - scroll.x < 0:
+    scroll.x = x
+  # left scroll on backspace - TODO IMPLEMENT
+
   for i in 0..lines.high():
     let line = lines[i]
     if i == 0:
@@ -44,23 +53,10 @@ proc render*(textBuffer: TextBuffer, termBuffer: Buffer, prompt: string, scroll:
     else:
       termBuffer.write(" ".repeat(promptLen))
 
-    let lineLen = line.len()
-    if lineLen < maxTextLen - 1:
-      scroll.x = 0
-      termBuffer.write(line)
-    else:
-      const scrollOffset = 2
-      # horizontal scroll
-      # right scroll
-      if x - scroll.x >= maxTextLen - scrollOffset:
-        scroll.x = x - maxTextLen + scrollOffset
-      # left scroll
-      if x - scroll.x < 0:
-        scroll.x = x
-      # left scroll
-      # keep what's in range
-      let fromPos = scroll.x
-      let toPos = min(scroll.x+maxTextLen-2, line.high())
+    # keep what's in range
+    let fromPos = scroll.x
+    let toPos = min(scroll.x+maxTextLen-2, line.high())
+    if fromPos <= line.high():
       termBuffer.write(line[fromPos..toPos])
     termBuffer.newLine()
   termBuffer.setCursorPos(x + promptLen - scroll.x, y - scroll.y)