@y = 0
@a = 0x000007 # cursor attributes
@partial = ''
+ @saved_normal_screen = null
@resize width, height
resize: (width, height) ->
when '\x0d' # cr
@x = 0
when '\x08' # backspace
- if @x > 0
+ if @x is 0
+ @x = @width - 1
+ if @y > 0
+ @y -= 1
+ else
@x -= 1
- @text[@y][@x] = ' '
- # should this set the attribute too?
when '\x0a', '\x0b' # lf, vertical tab (same thing)
@wrap_to_next_line()
else
+ if @x >= @width
+ @wrap_to_next_line()
@text[@y][@x] = c
@attributes[@y][@x] = @a
@x += 1
- if @x is @width
- @wrap_to_next_line()
return
set_attribute_bits: (mask, value) ->
csi_H: (row, column) ->
row = 0 + @fix_esc_arg row, 1
column = 0 + @fix_esc_arg column, 1
+
# convert to 0 base
column -= 1
- if 0 <= column < @width
- @x = column
- else
- console.log "tried to move cursor to invalid column: #{column}"
- row -= 1
- if 0 <= row < @height
- @y = row
- else
- console.log "tried to move cursor to invalid row: #{row}"
- # clear lines (implemented inclusive of the current line)
+ #clamp values
+ if column < 0
+ column = 0
+ else if column >= @width
+ column = @width - 1
+ if row < 0
+ row = 0
+ if row >= @height
+ row = @height - 1
+
+ #move the cursor
+ @x = column
+ @y = row
+
+ # clear to screen edge(es)
csi_J: (direction) ->
switch @fix_esc_arg direction, '0'
when '0' # erase down
+ # rest of current line
+ @csi_K direction
+ # rest of lines
for row in [@y...@height]
for i in [0...@width]
@text[row][i] = ' '
@attributes[row][i] = @a
when '1' # erase up
+ # beginning of current line
+ @csi_K direction
+ # all previous lines
for row in [0..@y]
for i in [0...@width]
@text[row][i] = ' '
@text[@y][i] = ' '
@attributes[@y][i] = @a
when '1' # erase to left
- for i in [0...@x]
+ for i in [0..@x]
@text[@y][i] = ' '
@attributes[@y][i] = @a
when '2' # erase whole line
@attributes[@y][i] = @a
else
console.log "confusing arg for csi_K: #{direction}"
+
+ # misc
+ csiq_h: ->
+ args = []
+ for i in arguments
+ switch @fix_esc_arg i, ''
+ when '1049'
+ if @saved_normal_screen?
+ console.log "ignoring request to switch to the alt screen because we're already on the alt screen"
+ return
+ @saved_normal_screen = [@x, @y, @text, @attributes]
+ @text = []
+ @attributes = []
+ for y in [0...@height]
+ @text[y] = []
+ @attributes[y] = []
+ for x in [0...@width]
+ @text[y].push ' '
+ @attributes[y].push 0
+ # unmisc
+ csiq_l: ->
+ args = []
+ for i in arguments
+ switch @fix_esc_arg i, ''
+ when '1049'
+ if not @saved_normal_screen?
+ console.log "ignoring request to switch to the normal screen because we're already on the normal screen"
+ return
+ @x = @saved_normal_screen[0]
+ @y = @saved_normal_screen[1]
+ @text = @saved_normal_screen[2]
+ @attributes = @saved_normal_screen[3]
+ @saved_normal_screen = null
# set color, bold, underline, etc
csi_m: ->
# str is the whole escape sequence (minus the esc[ prefix)
update_sequence: (str) ->
- command = @["csi_#{str.substr str.length - 1}"]
+ prefix = 'csi_'
+ if str[0] is '?'
+ prefix = 'csiq_'
+ str = str.substr 1
+ command = @[prefix + str.substr(str.length - 1)]
if not command?
console.log "Unrecognized sequence: ESC[#{str}"
return