diff options
Diffstat (limited to 'pager.c')
-rw-r--r-- | pager.c | 99 |
1 files changed, 75 insertions, 24 deletions
@@ -11,23 +11,8 @@ * something different on Windows. */ -#ifndef WIN32 -static void pager_preexec(void) -{ - /* - * Work around bug in "less" by not starting it until we - * have real input - */ - fd_set in; - - FD_ZERO(&in); - FD_SET(0, &in); - select(1, &in, NULL, &in, NULL); -} -#endif - static const char *pager_argv[] = { NULL, NULL }; -static struct child_process pager_process; +static struct child_process pager_process = CHILD_PROCESS_INIT; static void wait_for_pager(void) { @@ -63,7 +48,7 @@ const char *git_pager(int stdout_is_tty) pager = getenv("PAGER"); if (!pager) pager = DEFAULT_PAGER; - else if (!*pager || !strcmp(pager, "cat")) + if (!*pager || !strcmp(pager, "cat")) pager = NULL; return pager; @@ -76,6 +61,12 @@ void setup_pager(void) if (!pager) return; + /* + * 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 */ @@ -83,13 +74,10 @@ void setup_pager(void) pager_process.use_shell = 1; pager_process.argv = pager_argv; pager_process.in = -1; - if (!getenv("LESS")) { - static const char *env[] = { "LESS=FRSX", NULL }; - pager_process.env = env; - } -#ifndef WIN32 - pager_process.preexec_cb = pager_preexec; -#endif + if (!getenv("LESS")) + argv_array_push(&pager_process.env_array, "LESS=FRX"); + if (!getenv("LV")) + argv_array_push(&pager_process.env_array, "LV=-c"); if (start_command(&pager_process)) return; @@ -110,3 +98,66 @@ int pager_in_use(void) 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(uintmax_t number) +{ + int width; + + for (width = 1; number >= 10; width++) + number /= 10; + return width; +} + +/* returns 0 for "no pager", 1 for "use pager", and -1 for "not specified" */ +int check_pager_config(const char *cmd) +{ + int want = -1; + struct strbuf key = STRBUF_INIT; + const char *value = NULL; + strbuf_addf(&key, "pager.%s", cmd); + if (!git_config_get_value(key.buf, &value)) { + int b = git_config_maybe_bool(key.buf, value); + if (b >= 0) + want = b; + else { + want = 1; + pager_program = xstrdup(value); + } + } + strbuf_release(&key); + return want; +} |