X-Git-Url: https://jasonwoof.com/gitweb/?a=blobdiff_plain;f=terminal.coffee;h=174c005bc4ffe1a705e0cf0d575c072af263c87a;hb=3b348fde092c1173a26e0b6e3f20f6975ce751a3;hp=12d8a74a3fdc8d7c8571b5fbd326eecac2663ceb;hpb=5a99a6ff19d3eed9231a9820bcd76bb824eb6d32;p=watch-my-terminal.git

diff --git a/terminal.coffee b/terminal.coffee
index 12d8a74..174c005 100644
--- a/terminal.coffee
+++ b/terminal.coffee
@@ -7,6 +7,11 @@ else
 	window.terminal = {}
 	my_exports = window.terminal
 
+if console?.log?
+	log = -> console.log arguments...
+else
+	log = -> null
+
 class Terminal
 	# public:
 	constructor: (width, height) ->
@@ -19,10 +24,14 @@ class Terminal
 		@a = 0x000007 # cursor attributes
 		@partial = ''
 		@saved_normal_screen = null
+		@cursor_visible = true
+		@scroll_top = 0
+		@scroll_bottom = height - 1
 		@resize width, height
 
 	resize: (width, height) ->
 		# FIXME: write a version that retains some of the data
+		# FIXME: clamp variables (eg x, y, saved.*, scrolling region) if getting smaller
 		@width = width
 		@height = height
 		@text = []
@@ -32,7 +41,7 @@ class Terminal
 			@attributes[y] = []
 			for x in [0...width]
 				@text[y].push ' '
-				@attributes[y].push 0
+				@attributes[y].push 0x07
 
 	# pass data from stdout
 	update: (data) ->
@@ -40,33 +49,38 @@ class Terminal
 		if @partial.length > 0
 			data = @partial + data
 			@partial = ''
-		parts = data.split(/\x1b\[/)
+		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]
+		for i in [0...parts.length]
+			if i is 0
+				@update_text parts[i]
+			else
+				@update_sequence_then_text parts[i]
 		return
 
 	add_new_line: ->
-		# clear top line
+		# clear the line at the top of the scrolling region
 		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)
+			@text[@scroll_top][i] = ' '
+			@attributes[@scroll_top][i] = 0x07
+
+		rearrange = (a) =>
+			return [
+				a[0...@scroll_top]..., # up to but not including scroll top
+				a[@scroll_top + 1 .. @scroll_bottom]..., # scroll region except top line of it
+				a[@scroll_top], # top line of scroll region (already cleared)
+				a[@scroll_bottom + 1 ... @height]... # rest of screen
+			]
+		@text = rearrange @text
+		@attributes = rearrange @attributes
+
 		# slide cursor up with rest of text
 		@y -= 1
 
 	wrap_to_next_line: ->
-		if @y is @height - 1
+		if @y is @scroll_bottom
 			@add_new_line()
 		@y += 1
 		@x = 0
@@ -120,6 +134,7 @@ class Terminal
 		@y -= lines
 		if @y < 0
 			@y = 0
+		return
 
 	# move cursor down
 	csi_B: (lines) ->
@@ -127,6 +142,7 @@ class Terminal
 		@y += lines
 		if @y >= @height
 			@y = @height - 1
+		return
 
 	# move cursor right
 	csi_C: (cols) ->
@@ -134,6 +150,7 @@ class Terminal
 		@x += cols
 		if @x >= @width
 			@x = @width - 1
+		return
 
 	# move cursor left
 	csi_D: (cols) ->
@@ -141,6 +158,7 @@ class Terminal
 		@x -= cols
 		if @x < 0
 			@x = 0
+		return
 
 	# set cursor position (one based)
 	csi_H: (row, column) ->
@@ -161,6 +179,7 @@ class Terminal
 		#move the cursor
 		@x = column
 		@y = row
+		return
 
 	# clear to screen edge(es)
 	csi_J: (direction) ->
@@ -187,7 +206,7 @@ class Terminal
 						@text[row][i] = ' '
 						@attributes[row][i] = @a
 			else
-				console.log "confusing arg for csi_J: #{direction}"
+				log "confusing arg for csi_J: #{direction}"
 		return
 
 	# clear (some or all of) current line
@@ -211,20 +230,63 @@ class Terminal
 					@text[@y][i] = ' '
 					@attributes[@y][i] = @a
 			else
-				console.log "confusing arg for csi_K: #{direction}"
+				log "confusing arg for csi_K: #{direction}"
 		return
-	
+
+	# move lines downwards (arg is how far)
+	csi_L: (lines) ->
+		lines = parseInt @fix_esc_arg lines, '1'
+
+		rearrange = (a) =>
+			return [
+				a[0...@y]..., # keep everything above cursor
+				a[@scroll_bottom - lines + 1 .. @scroll_bottom]..., # we'll clear these shortly
+				a[@y..@scroll_bottom - lines]..., # lines that are moving down
+				a[@scroll_bottom + 1 ... @height]... # rest of screen
+			]
+		@text = rearrange @text
+		@attributes = rearrange @attributes
+
+		# clear the lines we scrolled off (and put back in as "new")
+		for y in [@y...@y+lines]
+			for x in [0...@width]
+				@text[y][x] = ' '
+				@attributes[y][x] = 0x07
+
+	# move lines upwards (arg is how far)
+	# this obliterates the line under the cursor and arg-1 following it
+	csi_M: (lines) ->
+		lines = parseInt @fix_esc_arg lines, '1'
+
+		rearrange = (a) =>
+			return [
+				a[0 ... @y]..., # keep everything above cursor
+				a[@y + lines .. @scroll_bottom]..., # lines we're moving up
+				a[@y ... @y + lines]..., # recycle these
+				a[@scroll_bottom + 1 ... @height]... # keep the rest
+			]
+		@text = rearrange @text
+		@attributes = rearrange @attributes
+
+		# clear the lines we're recycling
+		for y in [@scroll_bottom - lines + 1 .. @scroll_bottom]
+			for x in [0...@width]
+				@text[y][x] = ' '
+				@attributes[y][x] = 0x07
+
 	# misc
 	csiq_h: ->
 		args = []
 		for i in arguments
 			arg = @fix_esc_arg i, ''
 			switch arg
+				when '25'
+					@cursor_visible = true
 				when '1049'
 					if @saved_normal_screen?
-						console.log "ignoring request to switch to the alt screen because we're already on the alt screen"
+						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]
+					@saved_normal_screen = x: @x, y: @y, text: @text, attributes: @attributes
 					@text = []
 					@attributes = []
 					for y in [0...@height]
@@ -232,26 +294,31 @@ class Terminal
 						@attributes[y] = []
 						for x in [0...@width]
 							@text[y].push ' '
-							@attributes[y].push 0
+							@attributes[y].push 0x07
 				else
-					console.log "confusing arg for csiq_h: #{arg}"
+					log "confusing arg for csiq_h: #{arg}"
+		return
+
 	# unmisc
 	csiq_l: ->
 		args = []
 		for i in arguments
 			arg = @fix_esc_arg i, ''
 			switch arg
+				when '25'
+					@cursor_visible = false
 				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"
+						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]
+					@x = @saved_normal_screen.x
+					@y = @saved_normal_screen.y
+					@text = @saved_normal_screen.text
+					@attributes = @saved_normal_screen.attributes
 					@saved_normal_screen = null
 				else
-					console.log "confusing arg for csiq_l: #{arg}"
+					log "confusing arg for csiq_l: #{arg}"
+		return
 
 	# set color, bold, underline, etc
 	csi_m: ->
@@ -389,36 +456,66 @@ class Terminal
 
 				else
 					# if we don't recognize the style, go back to default
-					console.log "unrecognized csi_m arg: \"#{arg}\""
+					log "unrecognized csi_m arg: \"#{arg}\""
 					@a = 0
 		return
 
+	# set scroll region
+	csi_r: (top, bottom) ->
+		top = -1 + parseInt @fix_esc_arg top, '1'
+		bottom = -1 + parseInt @fix_esc_arg bottom, '10000'
+		if top < 0
+			top = 0
+		if bottom >= @height
+			bottom = @height - 1
+		@scroll_top = top
+		@scroll_bottom = bottom
+		return
+
+	# move cursor up one line, if it's at the top, scroll everything down
+	esc_M: ->
+		if @y > 0
+			@csi_A '1'
+		else
+			@csi_L '1'
+
 	# str is the whole escape sequence (minus the esc[ prefix)
 	update_sequence: (str) ->
-		prefix = 'csi_'
-		if str[0] is '?'
-			prefix = 'csiq_'
-			str = str.substr 1
+		if str[0] is '['
+			prefix = 'csi_'
+			if str[1] is '?'
+				prefix = 'csiq_'
+				str = str.substr 1
+			args = str.substr(1, str.length - 2).split ';'
+		else
+			prefix = 'esc_'
+			args = [str.substr(0, str.length - 1)]
 		command = @[prefix + str.substr(str.length - 1)]
 		if not command?
-			console.log "Unrecognized sequence: ESC[#{str}"
+			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
 		if len is -1
-			console.log "couldn't find escape sequence here: #{str.substr 0, 25}"
-			@update_text "ESC[" + str
+			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
+		if str[0] is '['
+			parts = str.match(/^\[[0-9;?]{0,25}./)
+			return -1 unless parts?
+			return parts[0].length
+		else
+			log "non[: ESC#{str.substr 0, 10}"
+			if str.length >= 1
+				return 1
+			else
+				return -1
 
 my_exports.new = (width, height) ->
 	return new Terminal width, height