tmux-highlight-text.patch enables tmux to highlight the text like iTerm2.

tmux-highlight-text-patch-LICENSE

This is free and unencumbered software released into the public domain.

Anyone is free to copy, modify, publish, use, compile, sell, or
distribute this software, either in source code form or as a compiled
binary, for any purpose, commercial or non-commercial, and by any
means.

In jurisdictions that recognize copyright laws, the author or authors
of this software dedicate any and all copyright interest in the
software to the public domain. We make this dedication for the benefit
of the public at large and to the detriment of our heirs and
successors. We intend this dedication to be an overt act of
relinquishment in perpetuity of all present and future rights to this
software under copyright law.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

For more information, please refer to <https://unlicense.org>

tmux-highlight-text-patch-README.md

tmux-highlight-text.patch

This patch enables tmux to highlight the text like iTerm2.
When some text in the terminal matches the regular expression set in tmux.conf, tmux highlights them.

usage

install

git clone https://github.com/tmux/tmux.git
cd tmux
git checkout -b v2.1 2.1
wget https://gist.githubusercontent.com/pxsta/5f86092eec0d611c2770/raw/tmux-highlight-text.patch
patch --dry-run -p0 < tmux-highlight-text.patch
patch -p0 < tmux-highlight-text.patch
sh autogen.sh
./configure && make
make install

config

Write like this at the '.tmux.conf'.

set-option -g trigger-highlight "Regular Expression" "Colour" IgnoreCase

• Regular Expression : When some text matches this regular expression, tmux highlights them.

• Colour : Put 'coulour[0-255]' like other *-fg options.

• IgnoreCase : If ignorecase put 1, otherwise put 0.

example

set-option -g trigger-highlight "error|fail|fatal" colour9 1
set-option -g trigger-highlight "note" colour96 1
set-option -g trigger-highlight "warning" colour93 1

tmux-highlight-text.gif

tmux-highlight-text.jpg

tmux-highlight-text.patch

diff --git Makefile.am Makefile.am
index 8b39ccf..711231f 100644
--- Makefile.am
+++ Makefile.am
@@ -139,6 +139,7 @@ dist_tmux_SOURCES = \
 	grid-cell.c \
 	grid-view.c \
 	grid.c \
+	highlight.c \
 	input-keys.c \
 	input.c \
 	job.c \
diff --git cmd-set-option.c cmd-set-option.c
index e0b07ed..8476fc3 100644
--- cmd-set-option.c
+++ cmd-set-option.c
@@ -63,10 +63,13 @@ struct options_entry *cmd_set_option_choice(struct cmd *, struct cmd_q *,
 struct options_entry *cmd_set_option_style(struct cmd *, struct cmd_q *,
 	    const struct options_table_entry *, struct options *,
 	    const char *);
+struct options_entry *cmd_set_highlight(struct cmd *, struct cmd_q *,
+	    const struct options_table_entry *, struct options *,
+	    const char *);
 
 const struct cmd_entry cmd_set_option_entry = {
 	"set-option", "set",
-	"agoqst:uw", 1, 2,
+	"agoqst:uw", 1, 4,
 	"[-agosquw] [-t target-session|target-window] option [value]",
 	0,
 	cmd_set_option_exec
@@ -342,6 +345,10 @@ cmd_set_option_set(struct cmd *self, struct cmd_q *cmdq,
 	case OPTIONS_TABLE_STYLE:
 		o = cmd_set_option_style(self, cmdq, oe, oo, value);
 		break;
+	case OPTIONS_TABLE_HIGHLIGHT:
+		o = cmd_set_highlight(self, cmdq, oe, oo, value);
+		break;
+
 	}
 	if (o == NULL)
 		return (-1);
@@ -404,6 +411,25 @@ cmd_set_option_key(unused struct cmd *self, struct cmd_q *cmdq,
 	return (options_set_number(oo, oe->name, key));
 }
 
+/* Set a highlight option. */
+struct options_entry *
+cmd_set_highlight(unused struct cmd *self, struct cmd_q *cmdq,
+    const struct options_table_entry *oe, struct options *oo,
+    const char *value)
+{
+	int fg, ignorecase;
+
+	if (self->args->argc < 4) {
+		cmdq_error(cmdq, "bad argument count : %d", self->args->argc);
+		return (NULL);
+	}
+
+	fg = colour_fromstring(self->args->argv[2]);
+	ignorecase = atoi(self->args->argv[3]);
+	add_highlight(value,fg, ignorecase);
+	return (options_set_number(oo,oe->name,fg));
+}
+
 /* Set a colour option. */
 struct options_entry *
 cmd_set_option_colour(unused struct cmd *self, struct cmd_q *cmdq,
diff --git highlight.c highlight.c
new file mode 100644
index 0000000..c297833
--- /dev/null
+++ highlight.c
@@ -0,0 +1,69 @@
+#include <stdlib.h>
+#include <string.h>
+#include <regex.h>
+
+#include "tmux.h"
+
+struct highlightlist  all_highlights = LIST_HEAD_INITIALIZER(all_highlights);
+
+int add_highlight(const char *regstr, int fg, int ignorecase){
+  struct highlight *tmp_highlight, *new_highlight;
+  int flags=REG_EXTENDED | REG_NEWLINE;
+
+  LIST_FOREACH(tmp_highlight, &all_highlights, lentry) {
+    if (strcmp(tmp_highlight->regstr, regstr) == 0 && tmp_highlight->ignorecase == ignorecase) {
+      free(tmp_highlight->regstr);
+      regfree(&tmp_highlight->reg);
+      tmp_highlight->regstr = xmalloc(sizeof(char)*strlen(regstr));
+      strcpy(tmp_highlight->regstr, regstr);
+      tmp_highlight->fg = fg;
+      tmp_highlight->ignorecase = ignorecase;
+      if(tmp_highlight->ignorecase){
+        flags |= REG_ICASE;
+      }
+      if (regcomp(&tmp_highlight->reg, tmp_highlight->regstr, flags) != 0) {
+        fprintf(stderr, "regex compile failed");
+        return 1;
+      }
+      return 0;
+    }
+  }
+  new_highlight = xmalloc(sizeof(struct highlight));
+  new_highlight->regstr = xmalloc(sizeof(char)*strlen(regstr));
+  strcpy(new_highlight->regstr, regstr);
+  new_highlight->fg = fg;
+  new_highlight->ignorecase = ignorecase;
+  if (new_highlight->ignorecase) {
+    flags |= REG_ICASE;
+  }
+  if (regcomp(&new_highlight->reg, new_highlight->regstr, flags) != 0) {
+    fprintf(stderr, "regex compile failed");
+    return 1;
+  }
+
+	LIST_INSERT_HEAD(&all_highlights, new_highlight, lentry);
+  return 0;
+}
+
+struct highlight_search_result find_highlight_target(const u_char *target){
+  struct highlight *tmp_highlight;
+  struct highlight_search_result res = {.find = 0, .start = 0, .end = 0};
+  regmatch_t patternMatch;
+
+  LIST_FOREACH(tmp_highlight, &all_highlights, lentry) { 
+    if (regexec(&tmp_highlight->reg, target, 1, &patternMatch, 0) == 0){
+     regoff_t tmp_startIndex = patternMatch.rm_so;
+     regoff_t tmp_endIndex = patternMatch.rm_eo;
+     if (tmp_startIndex == -1 || tmp_endIndex == -1) {
+         continue;
+     }
+     if (res.find == 0 || tmp_startIndex < res.start) {
+       res.start = tmp_startIndex;
+       res.end = tmp_endIndex;
+       res.fg = tmp_highlight->fg;
+     }
+     res.find = 1;
+    }
+  }
+  return res;
+}
diff --git input.c input.c
index ab56fc3..a45212c 100644
--- input.c
+++ input.c
@@ -47,6 +47,9 @@
  *   be passed to the underlying terminals.
  */
 
+/* To restore the original fg after the highlighting */
+int original_fg = -1;
+
 /* Input parser cell. */
 struct input_cell {
 	struct grid_cell	cell;
@@ -840,6 +843,9 @@ input_parse(struct window_pane *wp)
 	struct evbuffer			*evb = wp->event->input;
 	u_char				*buf;
 	size_t				 len, off;
+	struct highlight_search_result search_res = {.find = 0};
+	size_t startIndex = 0;
+	size_t endIndex = 0;
 
 	if (EVBUFFER_LENGTH(evb) == 0)
 		return;
@@ -869,6 +875,26 @@ input_parse(struct window_pane *wp)
 	while (off < len) {
 		ictx->ch = buf[off++];
 
+		if (off > endIndex) {
+			if (original_fg >= 0) {
+				ictx->cell.cell.fg = original_fg;
+				original_fg = -1;
+			}
+
+			search_res = find_highlight_target((u_char*)((unsigned long)buf+endIndex));
+			if (search_res.find) {
+				startIndex = endIndex + search_res.start;
+				endIndex = endIndex + search_res.end;
+			}
+		}
+
+		if (search_res.find && startIndex < off && off <= endIndex) {
+			if (original_fg == -1) {
+				original_fg = ictx->cell.cell.fg;
+			}
+			ictx->cell.cell.fg = search_res.fg;
+		}
+
 		/* Find the transition. */
 		itr = ictx->state->transitions;
 		while (itr->first != -1 && itr->last != -1) {
diff --git options-table.c options-table.c
index e901e24..cbb826f 100644
--- options-table.c
+++ options-table.c
@@ -782,6 +782,10 @@ const struct options_table_entry window_options_table[] = {
 	  .type = OPTIONS_TABLE_FLAG,
 	  .default_num = 0
 	},
+	{ .name = "trigger-highlight",
+	  .type = OPTIONS_TABLE_HIGHLIGHT,
+	  .default_num = -1
+	},
 
 	{ .name = NULL }
 };
diff --git tmux.h tmux.h
index 4d19a5a..a466240 100644
--- tmux.h
+++ tmux.h
@@ -29,6 +29,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <termios.h>
+#include <regex.h>
 
 #ifdef HAVE_UTEMPTER
 #include <utempter.h>
@@ -710,6 +711,22 @@ struct job {
 };
 LIST_HEAD(joblist, job);
 
+struct highlight{
+	char *regstr;
+	regex_t reg;
+	int fg;
+	int ignorecase;
+	LIST_ENTRY(highlight)	 lentry;
+};
+
+struct highlight_search_result{
+	int find;
+	off_t start;
+	off_t end;
+	int fg;
+};
+LIST_HEAD(highlightlist, highlight);
+
 /* Screen selection. */
 struct screen_sel {
 	int		 flag;
@@ -1376,7 +1393,8 @@ enum options_table_type {
 	OPTIONS_TABLE_ATTRIBUTES,
 	OPTIONS_TABLE_FLAG,
 	OPTIONS_TABLE_CHOICE,
-	OPTIONS_TABLE_STYLE
+	OPTIONS_TABLE_STYLE,
+	OPTIONS_TABLE_HIGHLIGHT
 };
 
 struct options_table_entry {
@@ -1532,6 +1550,11 @@ struct job *job_run(const char *, struct session *, int,
 void	job_free(struct job *);
 void	job_died(struct job *, int);
 
+/* highlight.c */
+extern struct highlightlist all_highlights;
+int add_highlight(const char *, int, int);
+struct highlight_search_result find_highlight_target(const u_char *);
+
 /* environ.c */
 int	environ_cmp(struct environ_entry *, struct environ_entry *);
 RB_PROTOTYPE(environ, environ_entry, entry, environ_cmp);