diff options
Diffstat (limited to 'pager.c')
| -rw-r--r-- | pager.c | 59 |
1 files changed, 51 insertions, 8 deletions
@@ -11,8 +11,6 @@ * something different on Windows. */ -static int spawned_pager; - #ifndef WIN32 static void pager_preexec(void) { @@ -75,10 +73,16 @@ void setup_pager(void) { const char *pager = git_pager(isatty(1)); - if (!pager) + if (!pager || pager_in_use()) return; - spawned_pager = 1; /* means we are emitting to terminal */ + /* + * force computing the width of the terminal before we redirect + * the standard output to the pager. + */ + (void) term_columns(); + + setenv("GIT_PAGER_IN_USE", "true", 1); /* spawn the pager */ pager_argv[0] = pager; @@ -109,10 +113,49 @@ void setup_pager(void) int pager_in_use(void) { const char *env; - - if (spawned_pager) - return 1; - env = getenv("GIT_PAGER_IN_USE"); return env ? git_config_bool("GIT_PAGER_IN_USE", env) : 0; } + +/* + * Return cached value (if set) or $COLUMNS environment variable (if + * set and positive) or ioctl(1, TIOCGWINSZ).ws_col (if positive), + * and default to 80 if all else fails. + */ +int term_columns(void) +{ + static int term_columns_at_startup; + + char *col_string; + int n_cols; + + if (term_columns_at_startup) + return term_columns_at_startup; + + term_columns_at_startup = 80; + + col_string = getenv("COLUMNS"); + if (col_string && (n_cols = atoi(col_string)) > 0) + term_columns_at_startup = n_cols; +#ifdef TIOCGWINSZ + else { + struct winsize ws; + if (!ioctl(1, TIOCGWINSZ, &ws) && ws.ws_col) + term_columns_at_startup = ws.ws_col; + } +#endif + + return term_columns_at_startup; +} + +/* + * How many columns do we need to show this number in decimal? + */ +int decimal_width(int number) +{ + int i, width; + + for (width = 1, i = 10; i <= number; width++) + i *= 10; + return width; +} |