diff --git a/7.4.770 b/7.4.770
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+To: vim_dev@googlegroups.com
+Subject: Patch 7.4.770
+Fcc: outbox
+From: Bram Moolenaar <Bram@moolenaar.net>
+Mime-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+------------
+
+Patch 7.4.770 (after 7.4.766)
+Problem: Background color response with transparency is not ignored.
+Solution: Change the way escape sequences are recognized. (partly by
+ Hirohito Higashi)
+Files: src/ascii.h, src/term.c
+
+
+*** ../vim-7.4.769/src/ascii.h 2011-12-17 21:38:36.000000000 +0100
+--- src/ascii.h 2015-07-10 12:02:02.379313390 +0200
+***************
+*** 34,43 ****
+ #define ESC_STR_nc "\033"
+ #define DEL 0x7f
+ #define DEL_STR (char_u *)"\177"
+- #define CSI 0x9b /* Control Sequence Introducer */
+- #define CSI_STR "\233"
+- #define DCS 0x90 /* Device Control String */
+- #define STERM 0x9c /* String Terminator */
+
+ #define POUND 0xA3
+
+--- 34,39 ----
+***************
+*** 117,127 ****
+ #define ESC_STR_nc "\x27"
+ #define DEL 0x07
+ #define DEL_STR (char_u *)"\007"
+- /* TODO: EBCDIC Code page dependent (here 1047) */
+- #define CSI 0x9b /* Control Sequence Introducer */
+- #define CSI_STR "\233"
+- #define DCS 0x90 /* Device Control String */
+- #define STERM 0x9c /* String Terminator */
+
+ #define POUND 0xB1
+
+--- 113,118 ----
+***************
+*** 173,178 ****
+--- 164,176 ----
+
+ #endif /* defined EBCDIC */
+
++ /* TODO: EBCDIC Code page dependent (here 1047) */
++ #define CSI 0x9b /* Control Sequence Introducer */
++ #define CSI_STR "\233"
++ #define DCS 0x90 /* Device Control String */
++ #define OSC 0x9d /* Operating System Command */
++ #define STERM 0x9c /* String Terminator */
++
+ /*
+ * Character that separates dir names in a path.
+ * For MS-DOS, WIN32 and OS/2 we use a backslash. A slash mostly works
+*** ../vim-7.4.769/src/term.c 2015-07-03 13:05:45.833974396 +0200
+--- src/term.c 2015-07-10 13:53:28.744975532 +0200
+***************
+*** 2364,2370 ****
+ if (p[1] == '[')
+ return CSI;
+ if (p[1] == ']')
+! return 0x9d;
+ if (p[1] == 'O')
+ return 0x8f;
+ }
+--- 2364,2370 ----
+ if (p[1] == '[')
+ return CSI;
+ if (p[1] == ']')
+! return OSC;
+ if (p[1] == 'O')
+ return 0x8f;
+ }
+***************
+*** 4261,4278 ****
+ * - Cursor position report: <Esc>[{row};{col}R
+ * The final byte must be 'R'. It is used for checking the
+ * ambiguous-width character state.
+- *
+- * - Background color response:
+- * <Esc>]11;rgb:{rrrr}/{gggg}/{bbbb}\007
+- * Or
+- * <Esc>]11;rgb:{rrrr}/{gggg}/{bbbb}ST
+- * The final byte must be '\007' or ST(0x9c or ESC\).
+ */
+! char_u *argp = tp[0] == CSI ? tp + 1 : tp + 2;
+
+! if ((*T_CRV != NUL || *T_U7 != NUL || *T_RBG != NUL)
+! && ((tp[0] == ESC && tp[1] == '[' && len >= 3)
+! || (tp[0] == ESC && tp[1] == ']' && len >= 24)
+ || (tp[0] == CSI && len >= 2))
+ && (VIM_ISDIGIT(*argp) || *argp == '>' || *argp == '?'))
+ {
+--- 4261,4271 ----
+ * - Cursor position report: <Esc>[{row};{col}R
+ * The final byte must be 'R'. It is used for checking the
+ * ambiguous-width character state.
+ */
+! char_u *argp = tp[0] == ESC ? tp + 2 : tp + 1;
+
+! if ((*T_CRV != NUL || *T_U7 != NUL)
+! && ((tp[0] == ESC && len >= 3 && tp[1] == '[')
+ || (tp[0] == CSI && len >= 2))
+ && (VIM_ISDIGIT(*argp) || *argp == '>' || *argp == '?'))
+ {
+***************
+*** 4410,4453 ****
+ key_name[1] = (int)KE_IGNORE;
+ slen = i + 1;
+ }
+! else if (*T_RBG != NUL
+! && len >= 24 - (tp[0] == CSI)
+! && len >= 24 - (tp[0] == CSI) + (argp[21] == ESC)
+! && argp[0] == '1' && argp[1] == '1'
+! && argp[2] == ';' && argp[3] == 'r' && argp[4] == 'g'
+! && argp[5] == 'b' && argp[6] == ':'
+! && argp[11] == '/' && argp[16] == '/'
+! && (argp[21] == '\007' || argp[21] == STERM
+! || (argp[21] == ESC && argp[22] == '\\')))
+! {
+! LOG_TR("Received RBG");
+! rbg_status = RBG_GOT;
+! if (!option_was_set((char_u *)"bg"))
+ {
+! set_option_value((char_u *)"bg", 0L, (char_u *)(
+! (3 * '6' < argp[7] + argp[12] + argp[17])
+! ? "light" : "dark"), 0);
+! reset_option_was_set((char_u *)"bg");
+! redraw_asap(CLEAR);
+ }
+! key_name[0] = (int)KS_EXTRA;
+! key_name[1] = (int)KE_IGNORE;
+! slen = 24 - (tp[0] == CSI) + (argp[21] == ESC);
+ }
+ }
+
+! /* Check for '<Esc>P1+r<hex bytes><Esc>\'. A "0" instead of the
+! * "1" means an invalid request. */
+ else if (check_for_codes
+! && ((tp[0] == ESC && tp[1] == 'P' && len >= 2)
+ || tp[0] == DCS))
+ {
+! j = 1 + (tp[0] != DCS);
+! for (i = j; i < len; ++i)
+! if ((tp[i] == ESC && tp[i + 1] == '\\' && i + 1 < len)
+ || tp[i] == STERM)
+ {
+! if (i - j >= 3 && tp[j + 1] == '+' && tp[j + 2] == 'r')
+ got_code_from_term(tp + j, i);
+ key_name[0] = (int)KS_EXTRA;
+ key_name[1] = (int)KE_IGNORE;
+--- 4403,4482 ----
+ key_name[1] = (int)KE_IGNORE;
+ slen = i + 1;
+ }
+! }
+!
+! /* Check for background color response from the terminal:
+! *
+! * {lead}11;rgb:{rrrr}/{gggg}/{bbbb}{tail}
+! *
+! * {lead} can be <Esc>] or OSC
+! * {tail} can be '\007', <Esc>\ or STERM.
+! *
+! * Consume any code that starts with "{lead}11;", it's also
+! * possible that "rgba" is following.
+! */
+! else if (*T_RBG != NUL
+! && ((tp[0] == ESC && len >= 2 && tp[1] == ']')
+! || tp[0] == OSC))
+! {
+! j = 1 + (tp[0] == ESC);
+! if (len >= j + 3 && (argp[0] != '1'
+! || argp[1] != '1' || argp[2] != ';'))
+! i = 0; /* no match */
+! else
+! for (i = j; i < len; ++i)
+! if (tp[i] == '\007' || (tp[0] == OSC ? tp[i] == STERM
+! : (tp[i] == ESC && i + 1 < len && tp[i + 1] == '\\')))
+ {
+! if (i - j >= 21 && STRNCMP(tp + j + 3, "rgb:", 4) == 0
+! && tp[j + 11] == '/' && tp[j + 16] == '/'
+! && !option_was_set((char_u *)"bg"))
+! {/* TODO: don't set option when already the right value */
+! LOG_TR("Received RBG");
+! rbg_status = RBG_GOT;
+! set_option_value((char_u *)"bg", 0L, (char_u *)(
+! (3 * '6' < tp[j+7] + tp[j+12] + tp[j+17])
+! ? "light" : "dark"), 0);
+! reset_option_was_set((char_u *)"bg");
+! redraw_asap(CLEAR);
+! }
+!
+! /* got finished code: consume it */
+! key_name[0] = (int)KS_EXTRA;
+! key_name[1] = (int)KE_IGNORE;
+! slen = i + 1 + (tp[i] == ESC);
+! break;
+ }
+! if (i == len)
+! {
+! LOG_TR("not enough characters for RB");
+! return -1;
+ }
+ }
+
+! /* Check for key code response from xterm:
+! *
+! * {lead}{flag}+r<hex bytes><{tail}
+! *
+! * {lead} can be <Esc>P or DCS
+! * {flag} can be '0' or '1'
+! * {tail} can be Esc>\ or STERM
+! *
+! * Consume any code that starts with "{lead}.+r".
+! */
+ else if (check_for_codes
+! && ((tp[0] == ESC && len >= 2 && tp[1] == 'P')
+ || tp[0] == DCS))
+ {
+! j = 1 + (tp[0] == ESC);
+! if (len >= j + 3 && (argp[1] != '+' || argp[2] != 'r'))
+! i = 0; /* no match */
+! else
+! for (i = j; i < len; ++i)
+! if ((tp[i] == ESC && i + 1 < len && tp[i + 1] == '\\')
+ || tp[i] == STERM)
+ {
+! if (i - j >= 3)
+ got_code_from_term(tp + j, i);
+ key_name[0] = (int)KS_EXTRA;
+ key_name[1] = (int)KE_IGNORE;
+***************
+*** 4457,4464 ****
+
+ if (i == len)
+ {
+ LOG_TR("not enough characters for XT");
+! return -1; /* not enough characters */
+ }
+ }
+ }
+--- 4486,4495 ----
+
+ if (i == len)
+ {
++ /* These codes arrive many together, each code can be
++ * truncated at any point. */
+ LOG_TR("not enough characters for XT");
+! return -1;
+ }
+ }
+ }
+*** ../vim-7.4.769/src/version.c 2015-07-04 15:05:08.606736259 +0200
+--- src/version.c 2015-07-10 12:04:22.282011343 +0200
+***************
+*** 743,744 ****
+--- 743,746 ----
+ { /* Add new patch number below this line */
++ /**/
++ 770,
+ /**/
+
+--
+Some of the well known MS-Windows errors:
+ ETIME Wrong time, wait a little while
+ ECRASH Try again...
+ EDETECT Unable to detect errors
+ EOVER You lost! Play another game?
+ ENOCLUE Eh, what did you want?
+
+ /// Bram Moolenaar -- Bram@Moolenaar.net -- http://www.Moolenaar.net \\\
+/// sponsor Vim, vote for features -- http://www.Vim.org/sponsor/ \\\
+\\\ an exciting new programming language -- http://www.Zimbu.org ///
+ \\\ help me help AIDS victims -- http://ICCF-Holland.org ///