80 lines
1.3 KiB
Plaintext
80 lines
1.3 KiB
Plaintext
# INFORMATION ABOUT THE TERMINAL
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## Get the terminal size in lines and columns (*from a script*)
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This is handy when writing scripts in pure bash and `stty`/`tput` can’t be
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called.
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**Example Function:**
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```sh
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get_term_size() {
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# Usage: get_term_size
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# (:;:) is a micro sleep to ensure the variables are
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# exported immediately.
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shopt -s checkwinsize; (:;:)
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printf '%s\n' "$LINES $COLUMNS"
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}
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```
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**Example Usage:**
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```shell
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# Output: LINES COLUMNS
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$ get_term_size
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15 55
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```
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## Get the terminal size in pixels
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**CAVEAT**: This does not work in some terminal emulators.
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**Example Function:**
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```sh
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get_window_size() {
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# Usage: get_window_size
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printf '%b' "${TMUX:+\\ePtmux;\\e}\\e[14t${TMUX:+\\e\\\\}"
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IFS=';t' read -d t -t 0.05 -sra term_size
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printf '%s\n' "${term_size[1]}x${term_size[2]}"
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}
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```
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**Example Usage:**
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```shell
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# Output: WIDTHxHEIGHT
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$ get_window_size
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1200x800
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# Output (fail):
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$ get_window_size
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x
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```
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## Get the current cursor position
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This is useful when creating a TUI in pure bash.
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**Example Function:**
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```sh
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get_cursor_pos() {
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# Usage: get_cursor_pos
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IFS='[;' read -p $'\e[6n' -d R -rs _ y x _
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printf '%s\n' "$x $y"
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}
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```
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**Example Usage:**
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```shell
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# Output: X Y
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$ get_cursor_pos
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1 8
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```
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<!-- CHAPTER END -->
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