From 8655480203f15cb6bf328b6523457e9f8b6e9425 Mon Sep 17 00:00:00 2001
From: Jason Woofenden <jason@jasonwoof.com>
Date: Wed, 30 Jan 2013 00:02:43 -0500
Subject: [PATCH] initial parsing code (finds escape sequences)

---
 parse.coffee |   63 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 parse.coffee

diff --git a/parse.coffee b/parse.coffee
new file mode 100644
index 0000000..b3dfed6
--- /dev/null
+++ b/parse.coffee
@@ -0,0 +1,63 @@
+async = require 'async'
+fs = require 'fs'
+
+class Terminal
+	# public:
+	constructor: (width, height) ->
+		@width = 1
+		@height = 1
+		@text = [""]
+		@attributes = [0]
+		@x = 0
+		@y = 0
+		@partial = ''
+		@resize width, height
+
+	resize: (width, height) ->
+		# FIXME: write a version that retains some of the data
+		@text = []
+		@attributes = []
+		for i in [0...height]
+			@text[i] = ""
+			@attributes[i] = new Array(width)
+
+	# pass data from stdout
+	update: (data) ->
+		return unless data?.length > 0
+		if @partial.length > 0
+			data = @partial + data
+			@partial = ''
+		parts = data.split(/\x1b\[/)
+		if parts.length > 1
+			if -1 is @escape_sequence_length parts[parts.length - 1]
+				@partial = parts.pop()
+		if parts.length > 0
+			for i in [0...parts.length]
+				if i is 0
+					@update_text parts[i]
+				else
+					@update_sequence_then_text parts[i]
+		return
+
+	# str has no escape sequences
+	update_text: (str) ->
+		return unless str.length > 0
+		console.log "text: \"#{str}\"" # FIXME
+
+	# str is the whole escape sequence (minus the esc[ prefix)
+	update_sequence: (str) ->
+		console.log "sequence: \"#{str}\"" # FIXME
+
+	update_sequence_then_text: (str) ->
+		len = @escape_sequence_length str
+		if len is -1
+			console.log "couldn't find escape sequence here: #{str.substr 0, 25}"
+			@update_text "ESC[" + str
+		else
+			@update_sequence str.substr 0, len
+			@update_text str.substr len
+
+	escape_sequence_length: (str) ->
+		parts = str.match(/^[0-9;?]{0,25}./)
+		return -1 unless parts?
+		return parts[0].length
-- 
1.7.10.4