[vte] sgr-test.sh: New script for testing SGR escape sequences

[Egmont Koblinger <egmontkob src gnome org>]

commit 9be01fdf027c1f3e5ed665e6da024cf5ca424f0b
Author: Egmont Koblinger <egmont gmail com>
Date:   Mon Dec 11 22:02:44 2017 +0100

    sgr-test.sh: New script for testing SGR escape sequences
    
    https://bugzilla.gnome.org/show_bug.cgi?id=721761

 perf/Makefile.am |    1 +
 perf/sgr-test.sh |  138 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 139 insertions(+), 0 deletions(-)
---
diff --git a/perf/Makefile.am b/perf/Makefile.am
index a5d6843..e308dea 100644
--- a/perf/Makefile.am
+++ b/perf/Makefile.am
@@ -5,6 +5,7 @@ EXTRA_DIST = \
        inc.sh \
        random.sh \
        scroll.vim \
+       sgr-test.sh \
        utf8.sh \
        vim.sh \
        $(NULL)
diff --git a/perf/sgr-test.sh b/perf/sgr-test.sh
new file mode 100755
index 0000000..82dc0dd
--- /dev/null
+++ b/perf/sgr-test.sh
@@ -0,0 +1,138 @@
+#!/usr/bin/env bash
+
+# Tester for various SGR attributes.
+# Copyright (C) 2017  Egmont Koblinger
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along
+# with this program; if not, write to the Free Software Foundation, Inc.,
+# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+words=(           Efg          Ijk                  Pqr                    Xyz)
+words_comment=(normal "green text" "magenta background" "bright red underline")
+words_start=(      ""           32                   45                 58:5:9)
+words_end=(        ""           39                   49                     59)
+
+attr_name=(bold dim italic underline underline "double underline" "double underline" "curly underline" blink 
reverse hidden strikethrough overline)
+attr_start=(  1   2      3         4       4:1                 21                4:2               4:3     5 
      7      8             9       53)
+attr_end=(   22  22     23        24       4:0                 24                4:0               4:0    25 
     27     28            29       55)
+
+col_name=("normal")
+col_start=("")
+col_end=("")
+
+row_name=("normal")
+row_start=("")
+row_end=("")
+
+# Construct the cell's contents
+cell=""
+cell_width=0
+for (( i = 0; i < ${#words[@]}; i++ )); do
+  if [ $i != 0 ]; then
+    cell="$cell "
+    cell_width=$((cell_width+1))
+  fi
+  if [ -n "${words_start[i]}" ]; then
+    cell="$cell"$'\e['"${words_start[i]}m"
+  fi
+  cell="$cell${words[i]}"
+  cell_width=$((cell_width+${#words[i]}))
+  if [ -n "${words_end[i]}" ]; then
+    cell="$cell"$'\e['"${words_end[i]}m"
+  fi
+done
+
+# Fill up the row_* arrays based on attr_*.
+col1_width=6
+for (( i = 0; i < ${#attr_name[@]}; i++ )); do
+  rn="${attr_name[i]} (${attr_start[i]}/${attr_end[i]})"
+  if [ ${#rn} -gt $col1_width ]; then
+    col1_width=${#rn}
+  fi
+  row_name+=("$rn")
+  row_start+=($'\e['"${attr_start[i]}m")
+  row_end+=($'\e['"${attr_end[i]}m")
+done
+
+# Fill up the col_* arrays based on the cmdline parameters
+for arg; do
+  name=""
+  start=""
+  end=""
+  IFS="+" read -r -a codes <<< "$arg"
+  for code in "${codes[@]}"; do
+    for (( i = 0; i < ${#attr_name[@]}; i++ )); do
+      if [ "$code" = "${attr_name[i]}" -o "$code" = "${attr_start[i]}" ]; then
+        if [ -n "$name" ]; then
+          name="$name + "
+        fi
+        name="$name${attr_name[i]} (${attr_start[i]}/${attr_end[i]})"
+        start="$start"$'\e['"${attr_start[i]}m"
+        end=$'\e['"${attr_end[i]}m$end"
+        break
+      fi
+    done
+  done
+  if [ -n "$name" ]; then
+    col_name+=("$name")
+    col_start+=("$start")
+    col_end+=("$end")
+  fi
+done
+
+
+echo "Hint:"
+echo "  Specify command line arguments (attribute names or starting numbers)"
+echo "  to create columns for them. Use the + sign to enable more attributes at once."
+echo "  E.g.: ${0##*/} 1 7+8, or ${0##*/} bold reverse+hidden."
+echo
+
+echo "Sample text is:"
+for (( i = 0; i < ${#words[@]}; i++ )); do
+  echo -n "  ${words[i]}: ${words_comment[i]}"
+  if [ -n "${words_start[i]}" -o -n "${words_end[i]}" ]; then
+    echo -n " (${words_start[i]}/${words_end[i]})"
+  fi
+  echo
+done
+echo
+
+# Print the top header, using multiple lines if necessary
+again=1
+while [ $again = 1 ]; do
+  again=0
+  printf "%${col1_width}s"
+  for (( col = 0; col < ${#col_end[@]}; col++ )); do
+    echo -n "  "
+    printf "%-${cell_width}.${cell_width}s" "${col_name[col]}"
+    col_name[col]="${col_name[col]:cell_width}"
+    if [ -n "${col_name[col]}" ]; then
+      again=1
+    fi
+  done
+  echo
+done
+
+# Print the body of the table
+for (( row = 0; row < ${#row_end[@]}; row++ )); do
+  printf "%-${col1_width}.${col1_width}s" "${row_name[row]}"
+  for (( col = 0; col < ${#col_end[@]}; col++ )); do
+    echo -n "  "
+    echo -n "${row_start[row]}"
+    echo -n "${col_start[col]}"
+    echo -n "$cell"
+    echo -n "${col_end[col]}"
+    echo -n "${row_end[row]}"
+  done
+  echo
+done