X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=terminal.coffee;h=913d87485b3c3da388b29df276b5bff0a479f16c;hb=4260b6a221b4d36c1611171e658243b03d597dc9;hp=94be906e2901c860a112442393aba45cd5297f00;hpb=8a70bdfc0c282df5a3c3b4cc78cc9d2de54e07be;p=watch-my-terminal.git diff --git a/terminal.coffee b/terminal.coffee index 94be906..913d874 100644 --- a/terminal.coffee +++ b/terminal.coffee @@ -1,30 +1,38 @@ -async = require 'async' -fs = require 'fs' +# this file is used by the client and server. + +# work around lack of module system in the browser: +if exports? + my_exports = exports +else + window.terminal = {} + my_exports = window.terminal class Terminal # public: constructor: (width, height) -> @width = 1 @height = 1 - @text = [""] - @attributes = [0] + @text = [] + @attributes = [] @x = 0 @y = 0 + @a = 0x000007 # cursor attributes @partial = '' + @saved_normal_screen = null @resize width, height - @text_callbacks = [] - @sequence_callbacks = [] - - on: (evt, callback) -> - @["#{evt}_callbacks"].push callback resize: (width, height) -> # FIXME: write a version that retains some of the data + @width = width + @height = height @text = [] @attributes = [] - for i in [0...height] - @text[i] = "" - @attributes[i] = new Array(width) + for y in [0...height] + @text[y] = [] + @attributes[y] = [] + for x in [0...width] + @text[y].push ' ' + @attributes[y].push 0 # pass data from stdout update: (data) -> @@ -44,18 +52,315 @@ class Terminal @update_sequence_then_text parts[i] return + add_new_line: -> + # clear top line + for i in [0...@width] + @text[0][i] = ' ' + @attributes[0][i] = 0 + # move (newly cleared) top line to the bottom + tmp = @text.shift() + @text.push(tmp) + tmp = @attributes.shift() + @attributes.push(tmp) + # slide cursor up with rest of text + @y -= 1 + + wrap_to_next_line: -> + if @y is @height - 1 + @add_new_line() + @y += 1 + @x = 0 + # str has no escape sequences update_text: (str) -> return unless str.length > 0 - for c in @text_callbacks - c str - console.log "text: \"#{str}\"" # FIXME + for c in str + switch c + when '\t' # tab + @update_text " ".substr(@x % 8) + when '\x07' # bell + false + when '\x0d' # cr + @x = 0 + when '\x08' # backspace + if @x is 0 + @x = @width - 1 + if @y > 0 + @y -= 1 + else + @x -= 1 + 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 + return + + set_attribute_bits: (mask, value) -> + @a = (@a & ~mask) | value + + # we're supposed to ignore leeding zeros, and while we're at it, lets swap + # in the default for blank or missing values + fix_esc_arg: (value, deef_alt) -> + if value? and value != '' + while value[0] is '0' and value.length > 1 + value = value.substr 1 + return value + else + return deef_alt + + # set cursor position (one based) + csi_H: (row, column) -> + row = 0 + @fix_esc_arg row, 1 + column = 0 + @fix_esc_arg column, 1 + + # convert to 0 base + column -= 1 + + #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] = ' ' + @attributes[row][i] = @a + when '2' # erase everything + for row in [0...@height] + for i in [0...@width] + @text[row][i] = ' ' + @attributes[row][i] = @a + else + console.log "confusing arg for csi_J: #{direction}" + + # clear (some or all of) current line + csi_K: (direction) -> + switch @fix_esc_arg direction, '0' + when '0' # erase to right + for i in [@x...@width] + @text[@y][i] = ' ' + @attributes[@y][i] = @a + when '1' # erase to left + # @x can equal @width (after printing to right-most column) + if @x < @width + max = @x + else + max = @width - 1 + for i in [0..max] + @text[@y][i] = ' ' + @attributes[@y][i] = @a + when '2' # erase whole line + for i in [0...@width] + @text[@y][i] = ' ' + @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: -> + args = [] + for i in arguments + args.push @fix_esc_arg i, 0 + + while args.length > 0 + switch args.shift() + + # remove all style/color + when '0' + @set_attribute_bits 0xffffff, 0x000007 + + # style attributes + when '1' # bold + @set_attribute_bits 0x10000, 0x10000 + when '4' # underline + @set_attribute_bits 0x20000, 0x20000 + when '5' # blink + @set_attribute_bits 0x40000, 0x40000 + when '8' # invisible + @set_attribute_bits 0x80000, 0x80000 + + # disable style attributes + when '22' # not bold... according to a page + @set_attribute_bits 0x10000, 0 + when '21' # ... though this would make more sense for "not bold" + @set_attribute_bits 0x10000, 0 + when '24' # not underline + @set_attribute_bits 0x20000, 0 + when '25' # not blink + @set_attribute_bits 0x40000, 0 + when '28' # not invisible + @set_attribute_bits 0x80000, 0 + + when '100' # reset colors but not other attributes + @set_attribute_bits 0xffff, 0x0007 + + # 8 fg colors + when '30' # fg black + @set_attribute_bits 0xff, 0x00 + when '31' # fg red + @set_attribute_bits 0xff, 0x01 + when '32' # fg green + @set_attribute_bits 0xff, 0x02 + when '33' # fg yellow + @set_attribute_bits 0xff, 0x03 + when '34' # fg blue + @set_attribute_bits 0xff, 0x04 + when '35' # fg magenta + @set_attribute_bits 0xff, 0x05 + when '36' # fg cyan + @set_attribute_bits 0xff, 0x06 + when '37', '39' # fg white (39 is default) + @set_attribute_bits 0xff, 0x07 + + when '38' + if args.length >= 2 and args[0] is '5' + args.shift() + @set_attribute_bits 0xff, (0xff & args.shift()) + else + @set_attribute_bits 0x20000, 0x20000 + + # 8 bg colors + when '40' # bg black + @set_attribute_bits 0xff00, 0x0000 + when '41' # bg red + @set_attribute_bits 0xff00, 0x0100 + when '42' # bg green + @set_attribute_bits 0xff00, 0x0200 + when '43' # bg yellow + @set_attribute_bits 0xff00, 0x0300 + when '44' # bg blue + @set_attribute_bits 0xff00, 0x0400 + when '45' # bg magenta + @set_attribute_bits 0xff00, 0x0500 + when '46' # bg cyan + @set_attribute_bits 0xff00, 0x0600 + when '47' # bg white + @set_attribute_bits 0xff00, 0x0700 + when '49' # bg default + @set_attribute_bits 0xff00, 0x0000 + + when '48' + if args.length >= 2 and args[0] is '5' + args.shift() + @set_attribute_bits 0xff00, ((0xff & args.shift()) << 8) + else + @set_attribute_bits 0x20000, 0x20000 + + # bright fg colors + when '90' # fg bright black + @set_attribute_bits 0xff, 0x08 + when '91' # fg bright red + @set_attribute_bits 0xff, 0x09 + when '92' # fg bright green + @set_attribute_bits 0xff, 0x0a + when '93' # fg bright yellow + @set_attribute_bits 0xff, 0x0b + when '94' # fg bright blue + @set_attribute_bits 0xff, 0x0c + when '95' # fg bright magenta + @set_attribute_bits 0xff, 0x0d + when '96' # fg bright cyan + @set_attribute_bits 0xff, 0x0e + when '97' # fg bright white + @set_attribute_bits 0xff, 0x0f + + # bright bg colors + when '100' # bg bright black + @set_attribute_bits 0xff, 0x08 + when '101' # bg bright red + @set_attribute_bits 0xff, 0x09 + when '102' # bg bright green + @set_attribute_bits 0xff, 0x0a + when '103' # bg bright yellow + @set_attribute_bits 0xff, 0x0b + when '104' # bg bright blue + @set_attribute_bits 0xff, 0x0c + when '105' # bg bright magenta + @set_attribute_bits 0xff, 0x0d + when '106' # bg bright cyan + @set_attribute_bits 0xff, 0x0e + when '107' # bg bright white + @set_attribute_bits 0xff, 0x0f + + + else + # if we don't recognize the style, go back to default + @set_attribute_bits 0xffffff, 0 + return # str is the whole escape sequence (minus the esc[ prefix) update_sequence: (str) -> - for c in @sequence_callbacks - c str - console.log "sequence: \"#{str}\"" # FIXME + 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 + args = str.substr(0, str.length - 1).split ';' + command.call this, args... update_sequence_then_text: (str) -> len = @escape_sequence_length str @@ -71,5 +376,5 @@ class Terminal return -1 unless parts? return parts[0].length -exports.new = (width, height) -> +my_exports.new = (width, height) -> return new Terminal width, height