187 lines
4.6 KiB
Bash
Executable File
187 lines
4.6 KiB
Bash
Executable File
#!/bin/bash
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FORE=$1
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BACK=$2
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FILL=$3
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if [ "$FORE" = "" ]; then
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FORE=DefaultFore
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fi
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if [ "$BACK" = "" ]; then
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BACK=DefaultBack
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fi
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# To detect color changes, we want a character that fills the whole cell
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# if possible. U+2588 is perfect, except that it becomes invisible in the
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# original xterm, when bolded. For that terminal, use something else, like
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# "#" or "@".
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if [ "$FILL" = "" ]; then
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FILL="█"
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fi
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# SGR (Select Graphic Rendition)
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s() {
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printf '\033[0m'
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while [ "$1" != "" ]; do
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printf '\033['"$1"'m'
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shift
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done
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}
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# Print
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p() {
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echo -n "$@"
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}
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# Print with newline
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pn() {
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echo "$@"
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}
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# For practical reasons, sandwich black and white in-between the other colors.
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FORE_COLORS="31 30 37 32 33 34 35 36"
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BACK_COLORS="41 40 47 42 43 44 45 46"
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### Test order of Invert(7) -- it does not matter what order it appears in.
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# The Red color setting here (31) is shadowed by the green setting (32). The
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# Reverse flag does not cause (32) to alter the background color immediately;
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# instead, the Reverse flag is applied once to determine the final effective
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# Fore/Back colors.
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s 7 31 32; p " -- Should be: $BACK-on-green -- "; s; pn
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s 31 7 32; p " -- Should be: $BACK-on-green -- "; s; pn
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s 31 32 7; p " -- Should be: $BACK-on-green -- "; s; pn
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# As above, but for the background color.
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s 7 41 42; p " -- Should be: green-on-$FORE -- "; s; pn
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s 41 7 42; p " -- Should be: green-on-$FORE -- "; s; pn
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s 41 42 7; p " -- Should be: green-on-$FORE -- "; s; pn
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# One last, related test
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s 7; p "Invert text"; s 7 1; p " with some words bold"; s; pn;
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s 0; p "Normal text"; s 0 1; p " with some words bold"; s; pn;
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pn
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### Test effect of Bold(1) on color, with and without Invert(7).
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# The Bold flag does not affect the background color when Reverse is missing.
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# There should always be 8 colored boxes.
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p " "
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for x in $BACK_COLORS; do
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s $x; p "-"; s $x 1; p "-"
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done
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s; pn " Bold should not affect background"
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# On some terminals, Bold affects color, and on some it doesn't. If there
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# are only 8 colored boxes, then the next two tests will also show 8 colored
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# boxes. If there are 16 boxes, then exactly one of the next two tests will
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# also have 16 boxes.
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p " "
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for x in $FORE_COLORS; do
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s $x; p "$FILL"; s $x 1; p "$FILL"
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done
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s; pn " Does bold affect foreground color?"
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# On some terminals, Bold+Invert highlights the final Background color.
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p " "
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for x in $FORE_COLORS; do
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s $x 7; p "-"; s $x 7 1; p "-"
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done
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s; pn " Test if Bold+Invert affects background color"
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# On some terminals, Bold+Invert highlights the final Foreground color.
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p " "
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for x in $BACK_COLORS; do
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s $x 7; p "$FILL"; s $x 7 1; p "$FILL"
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done
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s; pn " Test if Bold+Invert affects foreground color"
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pn
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### Test for support of ForeHi and BackHi properties.
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# ForeHi
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p " "
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for x in $FORE_COLORS; do
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hi=$(( $x + 60 ))
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s $x; p "$FILL"; s $hi; p "$FILL"
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done
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s; pn " Test for support of ForeHi colors"
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p " "
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for x in $FORE_COLORS; do
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hi=$(( $x + 60 ))
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s $x; p "$FILL"; s $x $hi; p "$FILL"
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done
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s; pn " Test for support of ForeHi colors (w/compat)"
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# BackHi
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p " "
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for x in $BACK_COLORS; do
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hi=$(( $x + 60 ))
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s $x; p "-"; s $hi; p "-"
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done
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s; pn " Test for support of BackHi colors"
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p " "
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for x in $BACK_COLORS; do
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hi=$(( $x + 60 ))
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s $x; p "-"; s $x $hi; p "-"
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done
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s; pn " Test for support of BackHi colors (w/compat)"
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pn
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### Identify the default fore and back colors.
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pn "Match default fore and back colors against 16-color palette"
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pn " ==fore== ==back=="
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for fore in $FORE_COLORS; do
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forehi=$(( $fore + 60 ))
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back=$(( $fore + 10 ))
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backhi=$(( $back + 60 ))
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p " "
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s $fore; p "$FILL"; s; p "$FILL"; s $fore; p "$FILL"; s; p " "
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s $forehi; p "$FILL"; s; p "$FILL"; s $forehi; p "$FILL"; s; p " "
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s $back; p "-"; s; p "-"; s $back; p "-"; s; p " "
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s $backhi; p "-"; s; p "-"; s $backhi; p "-"; s; p " "
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pn " $fore $forehi $back $backhi"
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done
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pn
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### Test coloring of rest-of-line.
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#
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# When a new line is scrolled in, every cell in the line receives the
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# current background color, which can be the default/transparent color.
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#
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p "Newline with red background: usually no red -->"; s 41; pn
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s; pn "This text is plain, but rest is red if scrolled -->"
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s; p " "; s 41; printf '\033[1K'; s; printf '\033[1C'; pn "<-- red Erase-in-Line to beginning"
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s; p "red Erase-in-Line to end -->"; s 41; printf '\033[0K'; s; pn
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pn
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### Moving the cursor around does not change colors of anything.
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pn "Test modifying uncolored lines with a colored SGR:"
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pn "aaaa"
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pn
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pn "____e"
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s 31 42; printf '\033[4C\033[3A'; pn "bb"
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pn "cccc"
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pn "dddd"
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s; pn
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