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vi: discover window size even on serial consoles. optional

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function                                             old     new   delta
edit_file                                            671     761     +90
wh_helper                                              -      57     +57
query_screen_dimensions                               54      63      +9
ar_main                                              533     542      +9
refresh                                              767     773      +6
vi_main                                              242     243      +1
text_yank                                             56      54      -2
get_terminal_width_height                            180     135     -45
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(add/remove: 1/0 grow/shrink: 5/2 up/down: 172/-47)           Total: 125 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko
2010-04-18 22:09:30 -07:00
parent def4783a8a
commit c175c46647
4 changed files with 64 additions and 25 deletions
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23
editors/vi.c
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@@ -138,6 +138,9 @@ struct globals {
int save_argc; // how many file names on cmd line
int cmdcnt; // repetition count
unsigned rows, columns; // the terminal screen is this size
#if ENABLE_FEATURE_VI_ASK_TERMINAL
int get_rowcol_error;
#endif
int crow, ccol; // cursor is on Crow x Ccol
int offset; // chars scrolled off the screen to the left
int have_status_msg; // is default edit status needed?
@@ -503,7 +506,11 @@ static int init_text_buffer(char *fn)
#if ENABLE_FEATURE_VI_WIN_RESIZE
static void query_screen_dimensions(void)
{
get_terminal_width_height(STDIN_FILENO, &columns, &rows);
# if ENABLE_FEATURE_VI_ASK_TERMINAL
if (!G.get_rowcol_error)
G.get_rowcol_error =
# endif
get_terminal_width_height(STDIN_FILENO, &columns, &rows);
if (rows > MAX_SCR_ROWS)
rows = MAX_SCR_ROWS;
if (columns > MAX_SCR_COLS)
@@ -530,6 +537,20 @@ static void edit_file(char *fn)
columns = 80;
size = 0;
query_screen_dimensions();
#if ENABLE_FEATURE_VI_ASK_TERMINAL
if (G.get_rowcol_error /* TODO? && no input on stdin */) {
uint64_t k;
write1("\033[999;999H" "\033[6n");
fflush_all();
k = read_key(STDIN_FILENO, readbuffer, /*timeout_ms:*/ 100);
if ((int32_t)k == KEYCODE_CURSOR_POS) {
uint32_t rc = (k >> 32);
columns = (rc & 0x7fff);
rows = ((rc >> 16) & 0x7fff);
}
query_screen_dimensions();
}
#endif
new_screen(rows, columns); // get memory for virtual screen
init_text_buffer(fn);