From aeaa7d150cacb5f858f1b516ca3e2234c68b8e55 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Tue, 23 Aug 2022 15:04:30 -0700
Subject: helper: file_exists

---
 file.lua | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/file.lua b/file.lua
index 9440ae8..6b36b0f 100644
--- a/file.lua
+++ b/file.lua
@@ -1,4 +1,14 @@
 -- primitives for saving to file and loading from file
+function file_exists(filename)
+  local infile = App.open_for_reading(filename)
+  if infile then
+    infile:close()
+    return true
+  else
+    return false
+  end
+end
+
 function load_from_disk(State)
   local infile = App.open_for_reading(State.filename)
   State.lines = load_from_file(infile)
-- 
cgit 1.4.1-2-gfad0


From 43dfa184d6e63e17efcd0c20a1090632eba88141 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Tue, 23 Aug 2022 15:06:18 -0700
Subject: helper: trimming whitespace from strings

---
 text.lua | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/text.lua b/text.lua
index 6f76442..61ead17 100644
--- a/text.lua
+++ b/text.lua
@@ -990,3 +990,15 @@ function Text.clear_screen_line_cache(State, line_index)
   State.line_cache[line_index].fragments = nil
   State.line_cache[line_index].screen_line_starting_pos = nil
 end
+
+function trim(s)
+  return s:gsub('^%s+', ''):gsub('%s+$', '')
+end
+
+function ltrim(s)
+  return s:gsub('^%s+', '')
+end
+
+function rtrim(s)
+  return s:gsub('%s+$', '')
+end
-- 
cgit 1.4.1-2-gfad0


From 89222f86a0dc3dd774ce46afaa1ba791ed65dba9 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Tue, 23 Aug 2022 15:09:14 -0700
Subject: set color for each fragment

In general it seems like good practice to minimize assumptions about
the current color.
---
 text.lua | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/text.lua b/text.lua
index 61ead17..2e3aa32 100644
--- a/text.lua
+++ b/text.lua
@@ -9,7 +9,6 @@ require 'text_tests'
 -- draw a line starting from startpos to screen at y between State.left and State.right
 -- return the final y, and position of start of final screen line drawn
 function Text.draw(State, line_index, y, startpos)
-  App.color(Text_color)
   local line = State.lines[line_index]
   local line_cache = State.line_cache[line_index]
   line_cache.starty = y
@@ -20,6 +19,7 @@ function Text.draw(State, line_index, y, startpos)
   local screen_line_starting_pos = startpos
   Text.compute_fragments(State, line_index)
   for _, f in ipairs(line_cache.fragments) do
+    App.color(Text_color)
     local frag, frag_text = f.data, f.text
     local frag_len = utf8.len(frag)
 --?     print('text.draw:', frag, 'at', line_index,pos, 'after', x,y)
-- 
cgit 1.4.1-2-gfad0