From: Jason Woofenden <jason@jasonwoof.com>
Date: Thu, 31 Jan 2013 20:37:23 +0000 (-0500)
Subject: add cursor incrementals movement: csi_[ABCD]
X-Git-Tag: v1.0~19
X-Git-Url: https://jasonwoof.com/gitweb/?p=watch-my-terminal.git;a=commitdiff_plain;h=5a99a6ff19d3eed9231a9820bcd76bb824eb6d32

add cursor incrementals movement: csi_[ABCD]
---

diff --git a/terminal.coffee b/terminal.coffee
index d6838da..12d8a74 100644
--- a/terminal.coffee
+++ b/terminal.coffee
@@ -112,11 +112,41 @@ class Terminal
 		else
 			return deef_alt
 
+	# csi_@: rxvt does nothing I can detect
+
+	# move cursor up
+	csi_A: (lines) ->
+		lines = parseInt @fix_esc_arg lines, '1'
+		@y -= lines
+		if @y < 0
+			@y = 0
+
+	# move cursor down
+	csi_B: (lines) ->
+		lines = parseInt @fix_esc_arg lines, '1'
+		@y += lines
+		if @y >= @height
+			@y = @height - 1
+
+	# move cursor right
+	csi_C: (cols) ->
+		cols = parseInt @fix_esc_arg cols, '1'
+		@x += cols
+		if @x >= @width
+			@x = @width - 1
+
+	# move cursor left
+	csi_D: (cols) ->
+		cols = parseInt @fix_esc_arg cols, '1'
+		@x -= cols
+		if @x < 0
+			@x = 0
+
 	# set cursor position (one based)
 	csi_H: (row, column) ->
 		# handle blank/missing args and convert to 0 base
-		row = @fix_esc_arg(row, 1) - 1
-		column = @fix_esc_arg(column, 1) - 1
+		row = -1 + parseInt @fix_esc_arg row, '1'
+		column = -1 + parseInt @fix_esc_arg column, '1'
 
 		#clamp values
 		if column < 0
@@ -188,7 +218,8 @@ class Terminal
 	csiq_h: ->
 		args = []
 		for i in arguments
-			switch @fix_esc_arg i, ''
+			arg = @fix_esc_arg i, ''
+			switch arg
 				when '1049'
 					if @saved_normal_screen?
 						console.log "ignoring request to switch to the alt screen because we're already on the alt screen"
@@ -202,11 +233,14 @@ class Terminal
 						for x in [0...@width]
 							@text[y].push ' '
 							@attributes[y].push 0
+				else
+					console.log "confusing arg for csiq_h: #{arg}"
 	# unmisc
 	csiq_l: ->
 		args = []
 		for i in arguments
-			switch @fix_esc_arg i, ''
+			arg = @fix_esc_arg i, ''
+			switch arg
 				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"
@@ -216,6 +250,8 @@ class Terminal
 					@text = @saved_normal_screen[2]
 					@attributes = @saved_normal_screen[3]
 					@saved_normal_screen = null
+				else
+					console.log "confusing arg for csiq_l: #{arg}"
 
 	# set color, bold, underline, etc
 	csi_m: ->
@@ -241,7 +277,7 @@ class Terminal
 					@set_attribute_bits 0x040000, 0x040000
 				when '7' # inverse
 					@set_attribute_bits 0x080000, 0x080000
-				when '8' # invisible
+				when '8' # invisible. urivt ignores this
 					@set_attribute_bits 0x100000, 0x100000
 
 				# disable style attributes