Merge lines.love

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)

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)
@@ -917,3 +917,15 @@ 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