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
24 resize: (width, height) ->
25 # FIXME: write a version that retains some of the data
37 # pass data from stdout
39 return unless data?.length > 0
40 if @partial.length > 0
41 data = @partial + data
43 parts = data.split(/\x1b\[/)
45 if -1 is @escape_sequence_length parts[parts.length - 1]
46 @partial = parts.pop()
48 for i in [0...parts.length]
52 @update_sequence_then_text parts[i]
60 # move (newly cleared) top line to the bottom
63 tmp = @attributes.shift()
65 # slide cursor up with rest of text
74 # str has no escape sequences
76 return unless str.length > 0
80 @update_text " ".substr(@x % 8)
85 when '\x08' # backspace
89 # should this set the attribute too?
90 when '\x0a', '\x0b' # lf, vertical tab (same thing)
94 @attributes[@y][@x] = @a
100 set_attribute_bits: (mask, value) ->
101 @a = (@a & ~mask) | value
103 # we're supposed to ignore leeding zeros, and while we're at it, lets swap
104 # in the default for blank or missing values
105 fix_esc_arg: (value, deef_alt) ->
106 if value? and value != ''
107 while value[0] is '0' and value.length > 1
108 value = value.substr 1
113 # set cursor position (one based)
114 csi_H: (row, column) ->
115 row = 0 + @fix_esc_arg row, 1
116 column = 0 + @fix_esc_arg column, 1
124 else if column >= @width
135 # clear to screen edge(es)
136 csi_J: (direction) ->
137 switch @fix_esc_arg direction, '0'
138 when '0' # erase down
139 # rest of current line
142 for row in [@y...@height]
143 for i in [0...@width]
145 @attributes[row][i] = @a
147 # beginning of current line
151 for i in [0...@width]
153 @attributes[row][i] = @a
154 when '2' # erase everything
155 for row in [0...@height]
156 for i in [0...@width]
158 @attributes[row][i] = @a
160 console.log "confusing arg for csi_J: #{direction}"
162 # clear (some or all of) current line
163 csi_K: (direction) ->
164 switch @fix_esc_arg direction, '0'
165 when '0' # erase to right
166 for i in [@x...@width]
168 @attributes[@y][i] = @a
169 when '1' # erase to left
172 @attributes[@y][i] = @a
173 when '2' # erase whole line
174 for i in [0...@width]
176 @attributes[@y][i] = @a
178 console.log "confusing arg for csi_K: #{direction}"
184 switch @fix_esc_arg i, ''
186 if @saved_normal_screen?
187 console.log "ignoring request to switch to the alt screen because we're already on the alt screen"
189 @saved_normal_screen = [@x, @y, @text, @attributes]
192 for y in [0...@height]
195 for x in [0...@width]
197 @attributes[y].push 0
202 switch @fix_esc_arg i, ''
204 if not @saved_normal_screen?
205 console.log "ignoring request to switch to the normal screen because we're already on the normal screen"
207 @x = @saved_normal_screen[0]
208 @y = @saved_normal_screen[1]
209 @text = @saved_normal_screen[2]
210 @attributes = @saved_normal_screen[3]
211 @saved_normal_screen = null
213 # set color, bold, underline, etc
217 args.push @fix_esc_arg i, 0
219 while args.length > 0
222 # remove all style/color
224 @set_attribute_bits 0xffffff, 0x000007
228 @set_attribute_bits 0x10000, 0x10000
230 @set_attribute_bits 0x20000, 0x20000
232 @set_attribute_bits 0x40000, 0x40000
234 @set_attribute_bits 0x80000, 0x80000
236 # disable style attributes
237 when '22' # not bold... according to a page
238 @set_attribute_bits 0x10000, 0
239 when '21' # ... though this would make more sense for "not bold"
240 @set_attribute_bits 0x10000, 0
241 when '24' # not underline
242 @set_attribute_bits 0x20000, 0
243 when '25' # not blink
244 @set_attribute_bits 0x40000, 0
245 when '28' # not invisible
246 @set_attribute_bits 0x80000, 0
248 when '100' # reset colors but not other attributes
249 @set_attribute_bits 0xffff, 0x0007
253 @set_attribute_bits 0xff, 0x00
255 @set_attribute_bits 0xff, 0x01
257 @set_attribute_bits 0xff, 0x02
258 when '33' # fg yellow
259 @set_attribute_bits 0xff, 0x03
261 @set_attribute_bits 0xff, 0x04
262 when '35' # fg magenta
263 @set_attribute_bits 0xff, 0x05
265 @set_attribute_bits 0xff, 0x06
266 when '37', '39' # fg white (39 is default)
267 @set_attribute_bits 0xff, 0x07
270 if args.length >= 2 and args[0] is '5'
272 @set_attribute_bits 0xff, (0xff & args.shift())
274 @set_attribute_bits 0x20000, 0x20000
278 @set_attribute_bits 0xff00, 0x0000
280 @set_attribute_bits 0xff00, 0x0100
282 @set_attribute_bits 0xff00, 0x0200
283 when '43' # bg yellow
284 @set_attribute_bits 0xff00, 0x0300
286 @set_attribute_bits 0xff00, 0x0400
287 when '45' # bg magenta
288 @set_attribute_bits 0xff00, 0x0500
290 @set_attribute_bits 0xff00, 0x0600
292 @set_attribute_bits 0xff00, 0x0700
293 when '49' # bg default
294 @set_attribute_bits 0xff00, 0x0000
297 if args.length >= 2 and args[0] is '5'
299 @set_attribute_bits 0xff00, ((0xff & args.shift()) << 8)
301 @set_attribute_bits 0x20000, 0x20000
304 when '90' # fg bright black
305 @set_attribute_bits 0xff, 0x08
306 when '91' # fg bright red
307 @set_attribute_bits 0xff, 0x09
308 when '92' # fg bright green
309 @set_attribute_bits 0xff, 0x0a
310 when '93' # fg bright yellow
311 @set_attribute_bits 0xff, 0x0b
312 when '94' # fg bright blue
313 @set_attribute_bits 0xff, 0x0c
314 when '95' # fg bright magenta
315 @set_attribute_bits 0xff, 0x0d
316 when '96' # fg bright cyan
317 @set_attribute_bits 0xff, 0x0e
318 when '97' # fg bright white
319 @set_attribute_bits 0xff, 0x0f
322 when '100' # bg bright black
323 @set_attribute_bits 0xff, 0x08
324 when '101' # bg bright red
325 @set_attribute_bits 0xff, 0x09
326 when '102' # bg bright green
327 @set_attribute_bits 0xff, 0x0a
328 when '103' # bg bright yellow
329 @set_attribute_bits 0xff, 0x0b
330 when '104' # bg bright blue
331 @set_attribute_bits 0xff, 0x0c
332 when '105' # bg bright magenta
333 @set_attribute_bits 0xff, 0x0d
334 when '106' # bg bright cyan
335 @set_attribute_bits 0xff, 0x0e
336 when '107' # bg bright white
337 @set_attribute_bits 0xff, 0x0f
341 # if we don't recognize the style, go back to default
342 @set_attribute_bits 0xffffff, 0
345 # str is the whole escape sequence (minus the esc[ prefix)
346 update_sequence: (str) ->
351 command = @[prefix + str.substr(str.length - 1)]
353 console.log "Unrecognized sequence: ESC[#{str}"
355 args = str.substr(0, str.length - 1).split ';'
356 command.call this, args...
358 update_sequence_then_text: (str) ->
359 len = @escape_sequence_length str
361 console.log "couldn't find escape sequence here: #{str.substr 0, 25}"
362 @update_text "ESC[" + str
364 @update_sequence str.substr 0, len
365 @update_text str.substr len
367 escape_sequence_length: (str) ->
368 parts = str.match(/^[0-9;?]{0,25}./)
369 return -1 unless parts?
370 return parts[0].length
372 my_exports.new = (width, height) ->
373 return new Terminal width, height