run.sh: complain if not passed width/height

[watch-my-terminal.git] / server.coffee

diff --git a/server.coffee b/server.coffee
index b5a6ad5..f79fe33 100644 (file)
--- a/server.coffee
+++ b/server.coffee
@@ -1,3 +1,14 @@
+# SETTINGS
+term_columns = 97
+term_lines = 63
+http_port = 2218
+
+if process.argv.length > 2
+       term_columns = parseInt process.argv[2]
+if process.argv.length > 3
+       term_lines = parseInt process.argv[3]
+
+
 handler = (req, res) ->
        reply_err = (req, res, msg) ->
                res.writeHead(200, 'Content-Type': 'text/plain')
@@ -12,6 +23,9 @@ handler = (req, res) ->
                when '/terminal.js'
                        filename = __dirname + '/terminal.coffee'
                        type = 'text/javascript'
+               when '/htmlterm.js'
+                       filename = __dirname + '/htmlterm.coffee'
+                       type = 'text/javascript'
                when '/client.js'
                        filename = __dirname + '/client.coffee'
                        type = 'text/javascript'
@@ -35,9 +49,8 @@ io = require('socket.io').listen(app)
 fs = require('fs')
 terminal = require('./terminal.coffee')
 
-# SETTINGS
-app.listen(2218)
-term = terminal.new(104, 66)
+app.listen(http_port)
+term = terminal.new(term_columns, term_lines)
 
 sockets = []
 
@@ -49,7 +62,61 @@ io.sockets.on 'connection', (socket) ->
                                sockets.splice i, 1
                                return
 
-       socket.emit 'init', width: term.width, height: term.height, x: term.x, y: term.y, a: term.a, text: term.text, attributes: term.attributes, cursor_visible: term.cursor_visible, scroll_top: term.scroll_top, scroll_bottom: term.scroll_bottom
+
+       enc_color = (prefix, c) ->
+               if c < 8
+                       return "#{prefix}#{c}"
+               if c < 16
+                       return "#{prefix + 6}#{c - 8}"
+               return "#{prefix}8;5;#{c}"
+
+       attr_diff = (a, b) ->
+               xo = a ^ b
+               parts = []
+               if (xo & 0xff)
+                       parts.push enc_color 3, (b & 0xff)
+               if (xo & 0xff00)
+                       parts.push enc_color 4, ((b & 0xff00) >> 8)
+               for [bit, code] in [[0x010000, '1'], [0x200000, '3'], [0x020000, '4'], [0x040000, '5'], [0x080000, '7'], [0x100000, '8']]
+                       if (xo & bit)
+                               if (b & bit)
+                                       parts.push code
+                               else
+                                       parts.push '2' + code
+               if parts.length
+                       return "\x1b[#{parts.join ';'}m"
+               else
+                       return ''
+       encode_screen = (height, width, text, attributes) ->
+               state = ''
+               for y in [0...height]
+                       max = width - 1
+                       while max >= 0 and text[y][max] is ' ' and (attributes[y][max] & 0x08ff00) is 0
+                               max -= 1
+                       if max >= 0
+                               for x in [0..max]
+                                       if attributes[y][x] isnt a
+                                               state += attr_diff a, attributes[y][x]
+                                               a = attributes[y][x]
+                                       state += text[y][x]
+                       if y < height - 1
+                               state += '\n'
+               return state
+
+       a = 0x07
+       state = ''
+       if term.saved_normal_screen?
+               state += encode_screen term.height, term.width, term.saved_normal_screen.text, term.saved_normal_screen.attributes
+               state += "\x1b[#{term.saved_normal_screen.y + 1};#{term.saved_normal_screen.x + 1}H"
+               state += "\x1b[?1049h\x1b[H" # flip to alt screen and move cursor home
+       state += encode_screen term.height, term.width, term.text, term.attributes
+       state += attr_diff a, term.a
+       state += "\x1b[#{term.y + 1};#{term.x + 1}H"
+       unless term.cursor_visible
+               state += "\x1b[?25l"
+       unless term.scroll_top is 0 and term.scroll_bottom is term.height - 1
+               state += "\x1b[#{term.scroll_top};#{term.scroll_bottom}r"
+       socket.emit 'init', width: term.width, height: term.height, text: state
 
 process.stdin.resume()
 process.stdin.setEncoding 'utf8'