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38 lines
970 B
C++
38 lines
970 B
C++
#pragma once
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///@file
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#include "types.hh"
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namespace nix {
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/**
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* Determine whether ANSI escape sequences are appropriate for the
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* present output.
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*/
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bool isTTY();
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/**
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* Truncate a string to 'width' printable characters. If 'filterAll'
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* is true, all ANSI escape sequences are filtered out. Otherwise,
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* some escape sequences (such as colour setting) are copied but not
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* included in the character count. Also, tabs are expanded to
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* spaces.
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*/
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std::string filterANSIEscapes(std::string_view s,
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bool filterAll = false,
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unsigned int width = std::numeric_limits<unsigned int>::max());
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/**
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* Recalculate the window size, updating a global variable. Used in the
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* `SIGWINCH` signal handler.
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*/
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void updateWindowSize();
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/**
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* @return the number of rows and columns of the terminal.
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*
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* The value is cached so this is quick. The cached result is computed
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* by `updateWindowSize()`.
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*/
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std::pair<unsigned short, unsigned short> getWindowSize();
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}
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