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Adapt help to terminal size

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If the error stream is a terminal, and we can retrieve the terminal
size, wrap the help content according to the terminal width.
This commit is contained in:
Romain Vimont 2021-11-11 15:22:39 +01:00
parent 38332f683c
commit 7a733328bc
1 changed files with 18 additions and 1 deletions
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19
app/src/cli.c
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@ -11,6 +11,7 @@
#include "util/log.h" #include "util/log.h"
#include "util/strbuf.h" #include "util/strbuf.h"
#include "util/str_util.h" #include "util/str_util.h"
#include "util/term.h"
#define STR_IMPL_(x) #x #define STR_IMPL_(x) #x
#define STR(x) STR_IMPL_(x) #define STR(x) STR_IMPL_(x)
@ -740,7 +741,23 @@ print_shortcut(const struct sc_shortcut *shortcut, unsigned cols) {
void void
scrcpy_print_usage(const char *arg0) { scrcpy_print_usage(const char *arg0) {
const unsigned cols = 80; // For now, use a hardcoded value #define SC_TERM_COLS_DEFAULT 80
unsigned cols;
if (!isatty(STDERR_FILENO)) {
// Not a tty
cols = SC_TERM_COLS_DEFAULT;
} else {
bool ok = sc_term_get_size(NULL, &cols);
if (!ok) {
// Could not get the terminal size
cols = SC_TERM_COLS_DEFAULT;
}
if (cols < 20) {
// Do not accept a too small value
cols = 20;
}
}
fprintf(stderr, "Usage: %s [options]\n\n" fprintf(stderr, "Usage: %s [options]\n\n"
"Options:\n", arg0); "Options:\n", arg0);