aboutsummaryrefslogtreecommitdiff
path: root/src
diff options
context:
space:
mode:
Diffstat (limited to 'src')
-rw-r--r--src/field.nim47
1 files changed, 26 insertions, 21 deletions
diff --git a/src/field.nim b/src/field.nim
index 82a8575..384cb47 100644
--- a/src/field.nim
+++ b/src/field.nim
@@ -1,5 +1,5 @@
type
- Line = ref object
+ Line = object
x: int
columns: seq[int]
@@ -11,7 +11,7 @@ type
func Blank*(f: var Field, x, y: int) =
if y < f.y or y >= f.y+f.ly: # outside the field
return
- var l = f.lines[y-f.y]
+ var l = addr f.lines[y-f.y]
if x < l.x or x >= l.x+l.columns.len: # outside the field
return
if x > l.x and x < l.x+l.columns.len-1: # just set the value
@@ -20,14 +20,14 @@ func Blank*(f: var Field, x, y: int) =
if l.columns.len == 1: # this was the last character on the line
if y == f.y: # we need to trim the leading lines
var i = 1
- while f.lines[i] == nil or f.lines[i].columns.len == 0:
+ while f.lines[i].columns.len == 0:
inc i
f.y += i
f.lines = f.lines[i..<f.ly]
f.ly -= i
elif y == f.y+f.ly-1: # we need to trim the trailing lines
var i = f.ly-2
- while f.lines[i] == nil or f.lines[i].columns.len == 0:
+ while f.lines[i].columns.len == 0:
dec i
f.ly = i+1
f.lines = f.lines[0..<f.ly]
@@ -48,7 +48,7 @@ func Blank*(f: var Field, x, y: int) =
f.x = f.lines[0].x
var x2 = f.lines[0].columns.len + f.lines[0].x
for i in 1..<f.ly:
- if f.lines[i] == nil or f.lines[i].columns.len == 0:
+ if f.lines[i].columns.len == 0:
continue
if f.x > f.lines[i].x:
f.x = f.lines[i].x
@@ -71,8 +71,10 @@ proc Load*(filename: string): ref Field =
if not open(file, filename):
return nil
defer: file.close()
- var f = new(Field)
- var l = new(Line)
+ var f: ref Field
+ new(f)
+ var l : ptr Line
+ var leadingSpaces = 0
var trailingSpaces = 0
var data: array[4096, char]
var lastReadIsCR = false
@@ -80,13 +82,12 @@ proc Load*(filename: string): ref Field =
let n = file.readChars(data, 0, 4096)
if n <= 0:
if f.ly == 0:
- if l.columns.len == 0: # we got en empty file!
+ if l == nil: # we got en empty file!
return nil
f.x = l.x
- if l.columns.len > 0:
+ if l != nil:
if f.lx < l.columns.len+l.x-f.x:
f.lx = l.columns.len+l.x-f.x
- f.lines.add(l)
inc f.ly
break
var i = 0
@@ -100,17 +101,18 @@ proc Load*(filename: string): ref Field =
continue
if data[i] == '\n' or data[i] == '\r':
if f.ly == 0:
- if l.columns.len == 0:
+ if l == nil:
return nil
f.x = l.x
- if l.columns.len > 0:
+ if l != nil:
if f.x > l.x:
f.x = l.x
if f.lx < l.columns.len+l.x-f.x:
f.lx = l.columns.len+l.x-f.x
+ else:
+ f.lines.add(Line())
inc f.ly
- f.lines.add(l)
- l = new(Line)
+ l = nil
trailingSpaces = 0
if data[i] == '\r':
if i+1 < n and data[i+1] == '\n':
@@ -119,11 +121,16 @@ proc Load*(filename: string): ref Field =
lastReadIsCR = true
else:
if data[i] == ' ':
- if l.columns.len == 0: # trim leading spaces
- inc l.x
+ if l == nil: # trim leading spaces
+ inc leadingSpaces
else:
inc trailingSpaces
else:
+ if l == nil:
+ f.lines.add(Line())
+ l = addr f.lines[^1]
+ l.x = leadingSpaces
+ leadingSpaces = 0
if trailingSpaces > 0:
let oldL = l.columns.len
l.columns.setlen(oldL+trailingSpaces+1)
@@ -134,6 +141,7 @@ proc Load*(filename: string): ref Field =
else:
l.columns.add(int(data[i]))
inc i
+ f.lines = f.lines[0..<f.ly]
return f
func Set*(f: var Field, x, y, v: int) =
@@ -141,13 +149,10 @@ func Set*(f: var Field, x, y, v: int) =
f.Blank(x, y)
elif y >= f.y:
if y < f.y+f.ly: # the line exists
- var l = f.lines[y-f.y]
- if l == nil or l.columns.len == 0: # An empty line is a special case
- if l == nil:
- new(l)
+ var l = addr f.lines[y-f.y]
+ if l.columns.len == 0: # An empty line is a special case
l.x = x
l.columns = @[v]
- f.lines[y-f.y] = l
if f.x > x:
f.lx = f.lx+f.x-x
f.x = x