From 5b4b055c6cbb9532f42901310db5ba26a93a1b3b Mon Sep 17 00:00:00 2001
From: sammyette <torchedsammy@gmail.com>
Date: Tue, 11 Jul 2023 20:24:38 -0400
Subject: [PATCH] fix(greenhouse): set scroll boundary properly, fix text
 cutoff

this means you can no longer scroll away the text until it isnt seen
this commit also fixes text cutoff when using lunacolors
(like in the doc command)
---
 nature/greenhouse/init.lua | 22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/nature/greenhouse/init.lua b/nature/greenhouse/init.lua
index 7e0b2c1..5206089 100644
--- a/nature/greenhouse/init.lua
+++ b/nature/greenhouse/init.lua
@@ -44,6 +44,21 @@ function Greenhouse:updateCurrentPage(text)
 	page:setText(text)
 end
 
+local function sub(str, limit)
+	local overhead = 0
+	local function addOverhead(s)
+		overhead = overhead + string.len(s)
+	end
+
+	local s = str:gsub('\x1b%[%d+;%d+;%d+;%d+;%d+%w', addOverhead)
+     :gsub('\x1b%[%d+;%d+;%d+;%d+%w', addOverhead)
+     :gsub('\x1b%[%d+;%d+;%d+%w',addOverhead)
+     :gsub('\x1b%[%d+;%d+%w', addOverhead)
+     :gsub('\x1b%[%d+%w', addOverhead)
+
+	return s:sub(0, limit + overhead)
+end
+
 function Greenhouse:draw()
 	local workingPage = self.pages[self.curPage]
 	local offset = self.offset
@@ -56,10 +71,9 @@ function Greenhouse:draw()
 	self.sink:write(ansikit.getCSI(self.start .. ';1', 'H'))
 	self.sink:write(ansikit.getCSI(2, 'J'))
 
-	-- the -2 negate is for the command and status line
-	for i = offset, offset + (self.region.height - self.start) do
+	for i = offset, offset + (self.region.height - 1) do
 		if i > #lines then break end
-		self.sink:writeln('\r' .. lines[i]:gsub('\t', '        '):sub(0, self.region.width - 2))
+		self.sink:writeln('\r' .. sub(lines[i]:gsub('\t', '        '), self.region.width - 2))
 	end
 	self.sink:write '\r'
 	self:render()
@@ -82,7 +96,7 @@ function Greenhouse:scroll(direction)
 
 	local oldOffset = self.offset
 	if direction == 'down' then
-		self.offset = math.min(self.offset + 1, #lines)
+		self.offset = math.min(self.offset + 1, math.max(1, #lines - self.region.height + 1))
 	elseif direction == 'up' then
 		self.offset = math.max(self.offset - 1, 1)
 	end