patch 8.0.0693: no terminal emulator support
Problem: No terminal emulator support. Cannot properly run commands in the
GUI. Cannot run a job interactively with an ssh connection.
Solution: Very early implementation of the :terminal command. Includes
libvterm converted to ANSI C. Many parts still missing.
diff --git a/src/libvterm/doc/URLs b/src/libvterm/doc/URLs
new file mode 100644
index 0000000..3a6512f
--- /dev/null
+++ b/src/libvterm/doc/URLs
@@ -0,0 +1,11 @@
+ECMA-48:
+ http://www.ecma-international.org/publications/standards/Ecma-048.htm
+
+Xterm Control Sequences:
+ http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+
+Digital VT100 User Guide:
+ http://vt100.net/docs/vt100-ug/
+
+Digital VT220 Programmer Reference Manual
+ http://vt100.net/docs/vt220-rm/
diff --git a/src/libvterm/doc/seqs.txt b/src/libvterm/doc/seqs.txt
new file mode 100644
index 0000000..e5372d0
--- /dev/null
+++ b/src/libvterm/doc/seqs.txt
@@ -0,0 +1,226 @@
+Sequences documented in parens are implicit ones from parser.c, which move
+between states.
+
+1 = VT100
+2 = VT220
+3 = VT320
+
+ C0 controls
+
+123 0x00 = NUL
+123 0x07 = BEL
+123 0x08 = BS
+123 0x09 = HT
+123 0x0A = LF
+123 0x0B = VT
+123 0x0C = FF
+123 0x0D = CR
+123 0x0E = LS1
+123 0x0F = LS0
+ (0x18 = CAN)
+ (0x1A = SUB)
+ (0x1B = ESC)
+
+123 0x7f = DEL (ignored)
+
+ C1 controls
+
+123 0x84 = IND
+123 0x85 = NEL
+123 0x88 = HTS
+123 0x8D = RI
+ 23 0x8e = SS2
+ 23 0x8f = SS3
+ (0x90 = DCS)
+ (0x9B = CSI)
+ (0x9C = ST)
+ (0x9D = OSC)
+
+ Escape sequences
+ - excluding sequences that are C1 aliases
+
+123 ESC () = SCS, select character set (G0, G1)
+ 23 ESC *+ = SCS, select character set (G2, G3)
+123 ESC 7 = DECSC - save cursor
+123 ESC 8 = DECRC - restore cursor
+123 ESC # 3 = DECDHL, double-height line (top half)
+123 ESC # 4 = DECDHL, double-height line (bottom half)
+123 ESC # 5 = DECSWL, single-width single-height line
+123 ESC # 6 = DECDWL, double-width single-height line
+123 ESC # 8 = DECALN
+123 ESC < = Ignored (used by VT100 to exit VT52 mode)
+123 ESC = = DECKPAM, keypad application mode
+123 ESC > = DECKPNM, keypad numeric mode
+ 23 ESC Sp F = S7C1T
+ 23 ESC Sp G = S8C1T
+ (ESC P = DCS)
+ (ESC [ = CSI)
+ (ESC \ = ST)
+ (ESC ] = OSC)
+123 ESC c = RIS, reset initial state
+ 3 ESC n = LS2
+ 3 ESC o = LS3
+ 3 ESC ~ = LS1R
+ 3 ESC } = LS2R
+ 3 ESC | = LS3R
+
+ DCSes
+
+ 3 DCS $ q ST = DECRQSS
+ 3 m = Request SGR
+ Sp q = Request DECSCUSR
+ 3 " q = Request DECSCA
+ 3 r = Request DECSTBM
+ s = Request DECSLRM
+
+ CSIs
+ 23 CSI @ = ICH
+123 CSI A = CUU
+123 CSI B = CUD
+123 CSI C = CUF
+123 CSI D = CUB
+ CSI E = CNL
+ CSI F = CPL
+ CSI G = CHA
+123 CSI H = CUP
+ CSI I = CHT
+123 CSI J = ED
+ 23 CSI ? J = DECSED, selective erase in display
+123 CSI K = EL
+ 23 CSI ? K = DECSEL, selective erase in line
+ 23 CSI L = IL
+ 23 CSI M = DL
+ 23 CSI P = DCH
+ CSI S = SU
+ CSI T = SD
+ 23 CSI X = ECH
+ CSI Z = CBT
+ CSI ` = HPA
+ CSI a = HPR
+123 CSI c = DA, device attributes
+123 0 = DA
+ 23 CSI > c = DECSDA
+ 23 0 = SDA
+ CSI d = VPA
+ CSI e = VPR
+123 CSI f = HVP
+123 CSI g = TBC
+123 CSI h = SM, Set mode
+123 CSI ? h = DECSM, DEC set mode
+ CSI j = HPB
+ CSI k = VPB
+123 CSI l = RM, Reset mode
+123 CSI ? l = DECRM, DEC reset mode
+123 CSI m = SGR, Set Graphic Rendition
+123 CSI n = DSR, Device Status Report
+ 23 5 = operating status
+ 23 6 = CPR = cursor position
+ 23 CSI ? n = DECDSR; behaves as DSR but uses CSI ? instead of CSI to respond
+ 23 CSI ! p = DECSTR, soft terminal reset
+ 3 CSI ? $ p = DECRQM, request mode
+ CSI Sp q = DECSCUSR (odd numbers blink, even numbers solid)
+ 1 or 2 = block
+ 3 or 4 = underline
+ 5 or 6 = I-beam to left
+ 23 CSI " q = DECSCA, select character attributes
+123 CSI r = DECSTBM
+ CSI s = DECSLRM
+ CSI ' } = DECIC
+ CSI ' ~ = DECDC
+
+ OSCs
+
+ OSC 0; = Set icon name and title
+ OSC 1; = Set icon name
+ OSC 2; = Set title
+
+ Standard modes
+
+ 23 SM 4 = IRM
+123 SM 20 = NLM, linefeed/newline
+
+ DEC modes
+
+123 DECSM 1 = DECCKM, cursor keys
+123 DECSM 5 = DECSCNM, screen
+123 DECSM 6 = DECOM, origin
+123 DECSM 7 = DECAWM, autowrap
+ DECSM 12 = Cursor blink
+ 23 DECSM 25 = DECTCEM, text cursor enable
+ DECSM 69 = DECVSSM, vertical screen split
+ DECSM 1000 = Mouse click/release tracking
+ DECSM 1002 = Mouse click/release/drag tracking
+ DECSM 1003 = Mouse all movements tracking
+ DECSM 1005 = Mouse protocol extended (UTF-8) - not recommended
+ DECSM 1006 = Mouse protocol SGR
+ DECSM 1015 = Mouse protocol rxvt
+ DECSM 1047 = Altscreen
+ DECSM 1048 = Save cursor
+ DECSM 1049 = 1047 + 1048
+ DECSM 2004 = Bracketed paste
+
+ Graphic Renditions
+
+123 SGR 0 = Reset
+123 SGR 1 = Bold on
+ SGR 3 = Italic on
+123 SGR 4 = Underline single
+123 SGR 5 = Blink on
+123 SGR 7 = Reverse on
+ SGR 9 = Strikethrough on
+ SGR 10-19 = Select font
+ SGR 21 = Underline double
+ 23 SGR 22 = Bold off
+ SGR 23 = Italic off
+ 23 SGR 24 = Underline off
+ 23 SGR 25 = Blink off
+ 23 SGR 27 = Reverse off
+ SGR 29 = Strikethrough off
+ SGR 30-37 = Foreground ANSI
+ SGR 38 = Foreground alternative palette
+ SGR 39 = Foreground default
+ SGR 40-47 = Background ANSI
+ SGR 48 = Background alternative palette
+ SGR 49 = Background default
+ SGR 90-97 = Foreground ANSI high-intensity
+ SGR 100-107 = Background ANSI high-intensity
+
+The state storage used by ESC 7 and DECSM 1048/1049 is shared.
+
+ Unimplemented sequences:
+
+The following sequences are not recognised by libvterm.
+
+123 0x05 = ENQ
+ 3 0x11 = DC1 (XON)
+ 3 0x13 = DC3 (XOFF)
+12 ESC Z = DECID, identify terminal
+ DCS $ q = [DECRQSS]
+ 3 " p = Request DECSCL
+ 3 $ } = Request DECSASD
+ 3 $ ~ = Request DECSSDT
+ 23 DCS { = DECDLD, down-line-loadable character set
+ 23 DCS | = DECUDK, user-defined key
+ 23 CSI i = DEC printer control
+ 23 CSI " p = DECSCL, set compatibility level
+1 CSI q = DECLL, load LEDs
+ 3 CSI $ u = DECRQTSR, request terminal state report
+ 3 1 = terminal state report
+ 3 CSI & u = DECRQUPSS, request user-preferred supplemental set
+ 3 CSI $ w = DECRQPSR, request presentation state report
+ 3 1 = cursor information report
+ 3 2 = tab stop report
+1 CSI x = DECREQTPARM, request terminal parameters
+123 CSI y = DECTST, invoke confidence test
+ 3 CSI $ } = DECSASD, select active status display
+ 3 CSI $ ~ = DECSSDT, select status line type
+ 23 SM 2 = KAM, keyboard action
+123 SM 12 = SRM, send/receive
+123 DECSM 2 = DECANM, ANSI/VT52
+123 DECSM 3 = DECCOLM, 132 column
+123 DECSM 4 = DECSCLM, scrolling
+123 DECSM 8 = DECARM, auto-repeat
+12 DECSM 9 = DECINLM, interlace
+ 23 DECSM 18 = DECPFF, print form feed
+ 23 DECSM 19 = DECPEX, print extent
+ 23 DECSM 42 = DECNRCM, national/multinational character