Merge lines.love

Manual_tests.md

@@ -5,6 +5,10 @@ record those here.
 
 Initializing settings:
   - delete app settings, start; window opens running the text editor
+  - run with a filename on commandline, scroll around, quit; restart without a filename; window opens running the text editor in same position+dimensions
+  - run with a filename on commandline, scroll around, quit; restart with same filename; window opens running the text editor in same position+dimensions
+  - run with a filename on commandline, scroll around, quit; restart with new filename; window opens new filename with cursor up top
+  - run editor, scroll around, move cursor to end of some line, quit; restart with new filename; window opens running the text editor in same position+dimensions
   - quit while running the text editor, restart; window opens running the text editor in same position+dimensions
   - quit while editing source (color; no drawings; no selection), restart; window opens editing source in same position+dimensions
   - start out running the text editor, move window, press ctrl+e twice; window is running text editor in same position+dimensions

edit.lua

@@ -111,7 +111,7 @@ function edit.check_locs(State)
   -- if State is inconsistent (i.e. file changed by some other program),
   --   throw away all cursor state entirely
   if edit.invalid1(State, State.screen_top1)
-      or edit.invalid1(State, State.cursor1)
+      or edit.invalid_cursor1(State)
       or not edit.cursor_on_text(State)
       or not Text.le1(State.screen_top1, State.cursor1) then
     State.screen_top1 = {line=1, pos=1}
@@ -126,6 +126,16 @@ function edit.invalid1(State, loc1)
   return loc1.pos > #State.lines[loc1.line].data
 end
 
+-- cursor loc in particular differs from other locs in one way:
+-- pos might occur just after end of line
+function edit.invalid_cursor1(State)
+  local cursor1 = State.cursor1
+  if cursor1.line > #State.lines then return true end
+  local l = State.lines[cursor1.line]
+  if l.mode ~= 'text' then return false end  -- pos is irrelevant to validity for a drawing line
+  return cursor1.pos > #State.lines[cursor1.line].data + 1
+end
+
 function edit.cursor_on_text(State)
   return State.cursor1.line <= #State.lines
       and State.lines[State.cursor1.line].mode == 'text'

run.lua

@@ -134,6 +134,13 @@ function run.settings()
   }
 end
 
+function absolutize(path)
+  if is_relative_path(path) then
+    return love.filesystem.getWorkingDirectory()..'/'..path  -- '/' should work even on Windows
+  end
+  return path
+end
+
 function run.mouse_press(x,y, mouse_button)
   Cursor_time = 0  -- ensure cursor is visible immediately after it moves
   return edit.mouse_press(Editor_state, x,y, mouse_button)