1 # this file is used by the client and server.
3 # work around lack of module system in the browser:
8 my_exports = window.terminal
12 constructor: (width, height) ->
19 @a = 0x000007 # cursor attributes
21 @saved_normal_screen = null
22 @cursor_visible = true
24 @scroll_bottom = height - 1
27 resize: (width, height) ->
28 # FIXME: write a version that retains some of the data
29 # FIXME: clamp variables (eg x, y, saved.*, scrolling region) if getting smaller
39 @attributes[y].push 0x07
41 # pass data from stdout
43 return unless data?.length > 0
44 if @partial.length > 0
45 data = @partial + data
47 parts = data.split(/\x1b\[/)
49 if -1 is @escape_sequence_length parts[parts.length - 1]
50 @partial = parts.pop()
52 for i in [0...parts.length]
56 @update_sequence_then_text parts[i]
60 # clear the line at the top of the scrolling region
62 @text[@scroll_top][i] = ' '
63 @attributes[@scroll_top][i] = 0x07
65 # move (newly cleared) top line to the bottom of the scrolling region
67 @text[0...@scroll_top]..., # up to but not including scroll top
68 @text[@scroll_top + 1 .. @scroll_bottom]..., # scroll region except top line of it
69 @text[@scroll_top], # top line of scroll region (already cleared)
70 @text[@scroll_bottom + 1 ... @height]... # rest of screen
73 @attributes[0...@scroll_top]..., # up to but not including scroll top
74 @attributes[@scroll_top + 1 .. @scroll_bottom]..., # scroll region except top line of it
75 @attributes[@scroll_top], # top line of scroll region (already cleared)
76 @attributes[@scroll_bottom + 1 ... @height]... # rest of screen
79 # slide cursor up with rest of text
83 if @y is @scroll_bottom
88 # str has no escape sequences
90 return unless str.length > 0
94 @update_text " ".substr(@x % 8)
99 when '\x08' # backspace
106 when '\x0a', '\x0b' # lf, vertical tab (same thing)
112 @attributes[@y][@x] = @a
116 set_attribute_bits: (mask, value) ->
117 @a = ((@a & ~mask) | value)
119 # we're supposed to ignore leeding zeros, and while we're at it, lets swap
120 # in the default for blank or missing values
121 fix_esc_arg: (value, deef_alt) ->
122 if value? and value != ''
123 while value[0] is '0' and value.length > 1
124 value = value.substr 1
129 # csi_@: rxvt does nothing I can detect
133 lines = parseInt @fix_esc_arg lines, '1'
141 lines = parseInt @fix_esc_arg lines, '1'
149 cols = parseInt @fix_esc_arg cols, '1'
157 cols = parseInt @fix_esc_arg cols, '1'
163 # set cursor position (one based)
164 csi_H: (row, column) ->
165 # handle blank/missing args and convert to 0 base
166 row = -1 + parseInt @fix_esc_arg row, '1'
167 column = -1 + parseInt @fix_esc_arg column, '1'
172 else if column >= @width
184 # clear to screen edge(es)
185 csi_J: (direction) ->
186 switch @fix_esc_arg direction, '0'
187 when '0' # erase down
188 # rest of current line
191 for row in [@y...@height]
192 for i in [0...@width]
194 @attributes[row][i] = @a
196 # beginning of current line
200 for i in [0...@width]
202 @attributes[row][i] = @a
203 when '2' # erase everything
204 for row in [0...@height]
205 for i in [0...@width]
207 @attributes[row][i] = @a
209 console.log "confusing arg for csi_J: #{direction}"
212 # clear (some or all of) current line
213 csi_K: (direction) ->
214 switch @fix_esc_arg direction, '0'
215 when '0' # erase to right
216 for i in [@x...@width]
218 @attributes[@y][i] = @a
219 when '1' # erase to left
220 # @x can equal @width (after printing to right-most column)
227 @attributes[@y][i] = @a
228 when '2' # erase whole line
229 for i in [0...@width]
231 @attributes[@y][i] = @a
233 console.log "confusing arg for csi_K: #{direction}"
236 # move lines downwards (arg is how far)
238 lines = parseInt @fix_esc_arg lines, '1'
240 # move (newly cleared) top line to the bottom of the scrolling region
242 @text[0...@y]..., # keep everything above cursor
243 @text[@scroll_bottom - lines + 1 .. @scroll_bottom]..., # we'll clear these shortly
244 @text[@y..@scroll_bottom - lines]..., # lines that are moving down
245 @text[@scroll_bottom + 1 ... @height]... # rest of screen
248 @attributes[0...@y]..., # keep everything above cursor
249 @attributes[@scroll_bottom - lines + 1 .. @scroll_bottom]..., # we'll clear these shortly
250 @attributes[@y..@scroll_bottom - lines]..., # lines that are moving down
251 @attributes[@scroll_bottom + 1 ... @height]... # rest of screen
254 # clear the lines we scrolled off (and put back in as "new")
255 for y in [@y...@y+lines]
256 for x in [0...@width]
258 @attributes[y][x] = 0x07
264 arg = @fix_esc_arg i, ''
267 @cursor_visible = true
269 if @saved_normal_screen?
270 console.log "ignoring request to switch to the alt screen because we're already on the alt screen"
272 @saved_normal_screen = [@x, @y, @text, @attributes]
275 for y in [0...@height]
278 for x in [0...@width]
280 @attributes[y].push 0x07
282 console.log "confusing arg for csiq_h: #{arg}"
289 arg = @fix_esc_arg i, ''
292 @cursor_visible = false
294 if not @saved_normal_screen?
295 console.log "ignoring request to switch to the normal screen because we're already on the normal screen"
297 @x = @saved_normal_screen[0]
298 @y = @saved_normal_screen[1]
299 @text = @saved_normal_screen[2]
300 @attributes = @saved_normal_screen[3]
301 @saved_normal_screen = null
303 console.log "confusing arg for csiq_l: #{arg}"
306 # set color, bold, underline, etc
310 args.push @fix_esc_arg i, '0'
312 while args.length > 0
315 # remove all style/color
321 @set_attribute_bits 0x010000, 0x010000
322 when '3' # italic (rare)
323 @set_attribute_bits 0x200000, 0x200000
325 @set_attribute_bits 0x020000, 0x020000
327 @set_attribute_bits 0x040000, 0x040000
329 @set_attribute_bits 0x080000, 0x080000
330 when '8' # invisible. urivt ignores this
331 @set_attribute_bits 0x100000, 0x100000
333 # disable style attributes
334 when '21' # not bold (rare)
335 @set_attribute_bits 0x010000, 0
337 @set_attribute_bits 0x010000, 0
338 when '23' # not italic (rare)
339 @set_attribute_bits 0x200000, 0
340 when '24' # not underline
341 @set_attribute_bits 0x020000, 0
342 when '25' # not blink
343 @set_attribute_bits 0x040000, 0
344 when '27' # not inverse
345 @set_attribute_bits 0x080000, 0
346 when '28' # not invisible
347 @set_attribute_bits 0x100000, 0
349 when '100' # reset colors but not other attributes
350 @set_attribute_bits 0xffff, 0x0007
354 @set_attribute_bits 0xff, 0x00
356 @set_attribute_bits 0xff, 0x01
358 @set_attribute_bits 0xff, 0x02
359 when '33' # fg yellow
360 @set_attribute_bits 0xff, 0x03
362 @set_attribute_bits 0xff, 0x04
363 when '35' # fg magenta
364 @set_attribute_bits 0xff, 0x05
366 @set_attribute_bits 0xff, 0x06
367 when '37', '39' # fg white (39 is default)
368 @set_attribute_bits 0xff, 0x07
371 if args.length >= 2 and args[0] is '5'
373 @set_attribute_bits 0xff, (0xff & args.shift())
375 @set_attribute_bits 0x20000, 0x20000
379 @set_attribute_bits 0xff00, 0x0000
381 @set_attribute_bits 0xff00, 0x0100
383 @set_attribute_bits 0xff00, 0x0200
384 when '43' # bg yellow
385 @set_attribute_bits 0xff00, 0x0300
387 @set_attribute_bits 0xff00, 0x0400
388 when '45' # bg magenta
389 @set_attribute_bits 0xff00, 0x0500
391 @set_attribute_bits 0xff00, 0x0600
393 @set_attribute_bits 0xff00, 0x0700
394 when '49' # bg default
395 @set_attribute_bits 0xff00, 0x0000
398 if args.length >= 2 and args[0] is '5'
400 @set_attribute_bits 0xff00, ((0xff & args.shift()) << 8)
402 @set_attribute_bits 0x20000, 0x20000
405 when '90' # fg bright black
406 @set_attribute_bits 0xff, 0x08
407 when '91' # fg bright red
408 @set_attribute_bits 0xff, 0x09
409 when '92' # fg bright green
410 @set_attribute_bits 0xff, 0x0a
411 when '93' # fg bright yellow
412 @set_attribute_bits 0xff, 0x0b
413 when '94' # fg bright blue
414 @set_attribute_bits 0xff, 0x0c
415 when '95' # fg bright magenta
416 @set_attribute_bits 0xff, 0x0d
417 when '96' # fg bright cyan
418 @set_attribute_bits 0xff, 0x0e
419 when '97' # fg bright white
420 @set_attribute_bits 0xff, 0x0f
423 when '100' # bg bright black
424 @set_attribute_bits 0xff, 0x08
425 when '101' # bg bright red
426 @set_attribute_bits 0xff, 0x09
427 when '102' # bg bright green
428 @set_attribute_bits 0xff, 0x0a
429 when '103' # bg bright yellow
430 @set_attribute_bits 0xff, 0x0b
431 when '104' # bg bright blue
432 @set_attribute_bits 0xff, 0x0c
433 when '105' # bg bright magenta
434 @set_attribute_bits 0xff, 0x0d
435 when '106' # bg bright cyan
436 @set_attribute_bits 0xff, 0x0e
437 when '107' # bg bright white
438 @set_attribute_bits 0xff, 0x0f
441 # if we don't recognize the style, go back to default
442 console.log "unrecognized csi_m arg: \"#{arg}\""
446 # set scrolling region
447 csi_r: (top, bottom) ->
448 top = -1 + parseInt @fix_esc_arg top, '1'
449 bottom = -1 + parseInt @fix_esc_arg bottom, '10000'
455 @scroll_bottom = bottom
458 # str is the whole escape sequence (minus the esc[ prefix)
459 update_sequence: (str) ->
464 command = @[prefix + str.substr(str.length - 1)]
466 console.log "Unrecognized sequence: ESC[#{str}"
468 args = str.substr(0, str.length - 1).split ';'
469 command.call this, args...
471 update_sequence_then_text: (str) ->
472 len = @escape_sequence_length str
474 console.log "couldn't find escape sequence here: #{str.substr 0, 25}"
475 @update_text "ESC[" + str
477 @update_sequence str.substr 0, len
478 @update_text str.substr len
480 escape_sequence_length: (str) ->
481 parts = str.match(/^[0-9;?]{0,25}./)
482 return -1 unless parts?
483 return parts[0].length
485 my_exports.new = (width, height) ->
486 return new Terminal width, height