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terminal: Document console codes less cryptically

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C.f. http://man7.org/linux/man-pages/man4/console_codes.4.html

Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
Reviewed-by: Derek Foreman <derekf@osg.samsung.com>
dev
Bryce Harrington 9 years ago
parent b4dae9beff
commit f013ce96c5
1 changed files with 36 additions and 36 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 72
      clients/terminal.c

72
clients/terminal.c
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@ -1333,12 +1333,12 @@ handle_escape(struct terminal *terminal)
} }
switch (*p) { switch (*p) {
case '@': /* ICH */ case '@': /* ICH - Insert <count> blank characters */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
terminal_shift_line(terminal, count); terminal_shift_line(terminal, count);
break; break;
case 'A': /* CUU */ case 'A': /* CUU - Move cursor up <count> rows */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
if (terminal->row - count >= terminal->margin_top) if (terminal->row - count >= terminal->margin_top)
@ -1346,7 +1346,7 @@ handle_escape(struct terminal *terminal)
else else
terminal->row = terminal->margin_top; terminal->row = terminal->margin_top;
break; break;
case 'B': /* CUD */ case 'B': /* CUD - Move cursor down <count> rows */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
if (terminal->row + count <= terminal->margin_bottom) if (terminal->row + count <= terminal->margin_bottom)
@ -1354,7 +1354,7 @@ handle_escape(struct terminal *terminal)
else else
terminal->row = terminal->margin_bottom; terminal->row = terminal->margin_bottom;
break; break;
case 'C': /* CUF */ case 'C': /* CUF - Move cursor right by <count> columns */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
if ((terminal->column + count) < terminal->width) if ((terminal->column + count) < terminal->width)
@ -1362,7 +1362,7 @@ handle_escape(struct terminal *terminal)
else else
terminal->column = terminal->width - 1; terminal->column = terminal->width - 1;
break; break;
case 'D': /* CUB */ case 'D': /* CUB - Move cursor left <count> columns */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
if ((terminal->column - count) >= 0) if ((terminal->column - count) >= 0)
@ -1370,7 +1370,7 @@ handle_escape(struct terminal *terminal)
else else
terminal->column = 0; terminal->column = 0;
break; break;
case 'E': /* CNL */ case 'E': /* CNL - Move cursor down <count> rows, to column 1 */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (terminal->row + count <= terminal->margin_bottom) if (terminal->row + count <= terminal->margin_bottom)
terminal->row += count; terminal->row += count;
@ -1378,7 +1378,7 @@ handle_escape(struct terminal *terminal)
terminal->row = terminal->margin_bottom; terminal->row = terminal->margin_bottom;
terminal->column = 0; terminal->column = 0;
break; break;
case 'F': /* CPL */ case 'F': /* CPL - Move cursour up <count> rows, to column 1 */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (terminal->row - count >= terminal->margin_top) if (terminal->row - count >= terminal->margin_top)
terminal->row -= count; terminal->row -= count;
@ -1386,14 +1386,14 @@ handle_escape(struct terminal *terminal)
terminal->row = terminal->margin_top; terminal->row = terminal->margin_top;
terminal->column = 0; terminal->column = 0;
break; break;
case 'G': /* CHA */ case 'G': /* CHA - Move cursor to column <y> in current row */
y = set[0] ? args[0] : 1; y = set[0] ? args[0] : 1;
y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y; y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y;
terminal->column = y - 1; terminal->column = y - 1;
break; break;
case 'f': /* HVP */ case 'f': /* HVP - Move cursor to <x, y> */
case 'H': /* CUP */ case 'H': /* CUP - Move cursor to <x, y> (origin at 1,1) */
x = (set[1] ? args[1] : 1) - 1; x = (set[1] ? args[1] : 1) - 1;
x = x < 0 ? 0 : x = x < 0 ? 0 :
(x >= terminal->width ? terminal->width - 1 : x); (x >= terminal->width ? terminal->width - 1 : x);
@ -1420,7 +1420,7 @@ handle_escape(struct terminal *terminal)
} }
terminal->column--; terminal->column--;
break; break;
case 'J': /* ED */ case 'J': /* ED - Erase display */
row = terminal_get_row(terminal, terminal->row); row = terminal_get_row(terminal, terminal->row);
attr_row = terminal_get_attr_row(terminal, terminal->row); attr_row = terminal_get_attr_row(terminal, terminal->row);
if (!set[0] || args[0] == 0 || args[0] > 2) { if (!set[0] || args[0] == 0 || args[0] > 2) {
@ -1449,7 +1449,7 @@ handle_escape(struct terminal *terminal)
terminal->end - terminal->start); terminal->end - terminal->start);
} }
break; break;
case 'K': /* EL */ case 'K': /* EL - Erase line */
row = terminal_get_row(terminal, terminal->row); row = terminal_get_row(terminal, terminal->row);
attr_row = terminal_get_attr_row(terminal, terminal->row); attr_row = terminal_get_attr_row(terminal, terminal->row);
if (!set[0] || args[0] == 0 || args[0] > 2) { if (!set[0] || args[0] == 0 || args[0] > 2) {
@ -1465,7 +1465,7 @@ handle_escape(struct terminal *terminal)
attr_init(attr_row, terminal->curr_attr, terminal->width); attr_init(attr_row, terminal->curr_attr, terminal->width);
} }
break; break;
case 'L': /* IL */ case 'L': /* IL - Insert <count> blank lines */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
if (terminal->row >= terminal->margin_top && if (terminal->row >= terminal->margin_top &&
@ -1482,7 +1482,7 @@ handle_escape(struct terminal *terminal)
terminal->curr_attr, terminal->width); terminal->curr_attr, terminal->width);
} }
break; break;
case 'M': /* DL */ case 'M': /* DL - Delete <count> lines */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
if (terminal->row >= terminal->margin_top && if (terminal->row >= terminal->margin_top &&
@ -1497,7 +1497,7 @@ handle_escape(struct terminal *terminal)
0, terminal->data_pitch); 0, terminal->data_pitch);
} }
break; break;
case 'P': /* DCH */ case 'P': /* DCH - Delete <count> characters on current line */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
terminal_shift_line(terminal, 0 - count); terminal_shift_line(terminal, 0 - count);
@ -1508,7 +1508,7 @@ handle_escape(struct terminal *terminal)
case 'T': /* SD */ case 'T': /* SD */
terminal_scroll(terminal, 0 - (set[0] ? args[0] : 1)); terminal_scroll(terminal, 0 - (set[0] ? args[0] : 1));
break; break;
case 'X': /* ECH */ case 'X': /* ECH - Erase <count> characters on current line */
count = set[0] ? args[0] : 1; count = set[0] ? args[0] : 1;
if (count == 0) count = 1; if (count == 0) count = 1;
if ((terminal->column + count) > terminal->width) if ((terminal->column + count) > terminal->width)
@ -1527,7 +1527,7 @@ handle_escape(struct terminal *terminal)
} }
terminal->column++; terminal->column++;
break; break;
case '`': /* HPA */ case '`': /* HPA - Move cursor to <y> column in current row */
y = set[0] ? args[0] : 1; y = set[0] ? args[0] : 1;
y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y; y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y;
@ -1541,33 +1541,33 @@ handle_escape(struct terminal *terminal)
handle_char(terminal, terminal->last_char); handle_char(terminal, terminal->last_char);
terminal->last_char.byte[0] = 0; terminal->last_char.byte[0] = 0;
break; break;
case 'c': /* Primary DA */ case 'c': /* Primary DA - Answer "I am a VT102" */
terminal_write(terminal, "\e[?6c", 5); terminal_write(terminal, "\e[?6c", 5);
break; break;
case 'd': /* VPA */ case 'd': /* VPA - Move cursor to <x> row, current column */
x = set[0] ? args[0] : 1; x = set[0] ? args[0] : 1;
x = x <= 0 ? 1 : x > terminal->height ? terminal->height : x; x = x <= 0 ? 1 : x > terminal->height ? terminal->height : x;
terminal->row = x - 1; terminal->row = x - 1;
break; break;
case 'g': /* TBC */ case 'g': /* TBC - Clear tab stop(s) */
if (!set[0] || args[0] == 0) { if (!set[0] || args[0] == 0) {
terminal->tab_ruler[terminal->column] = 0; terminal->tab_ruler[terminal->column] = 0;
} else if (args[0] == 3) { } else if (args[0] == 3) {
memset(terminal->tab_ruler, 0, terminal->width); memset(terminal->tab_ruler, 0, terminal->width);
} }
break; break;
case 'h': /* SM */ case 'h': /* SM - Set mode */
for (i = 0; i < 10 && set[i]; i++) { for (i = 0; i < 10 && set[i]; i++) {
handle_term_parameter(terminal, args[i], 1); handle_term_parameter(terminal, args[i], 1);
} }
break; break;
case 'l': /* RM */ case 'l': /* RM - Reset mode */
for (i = 0; i < 10 && set[i]; i++) { for (i = 0; i < 10 && set[i]; i++) {
handle_term_parameter(terminal, args[i], 0); handle_term_parameter(terminal, args[i], 0);
} }
break; break;
case 'm': /* SGR */ case 'm': /* SGR - Set attributes */
for (i = 0; i < 10; i++) { for (i = 0; i < 10; i++) {
if (i <= 7 && set[i] && set[i + 1] && if (i <= 7 && set[i] && set[i + 1] &&
set[i + 2] && args[i + 1] == 5) set[i + 2] && args[i + 1] == 5)
@ -1590,7 +1590,7 @@ handle_escape(struct terminal *terminal)
} }
} }
break; break;
case 'n': /* DSR */ case 'n': /* DSR - Status report */
i = set[0] ? args[0] : 0; i = set[0] ? args[0] : 0;
if (i == 0 || i == 5) { if (i == 0 || i == 5) {
terminal_write(terminal, "\e[0n", 4); terminal_write(terminal, "\e[0n", 4);
@ -1602,7 +1602,7 @@ handle_escape(struct terminal *terminal)
terminal_write(terminal, response, strlen(response)); terminal_write(terminal, response, strlen(response));
} }
break; break;
case 'r': case 'r': /* DECSTBM - Set scrolling region */
if (!set[0]) { if (!set[0]) {
terminal->margin_top = 0; terminal->margin_top = 0;
terminal->margin_bottom = terminal->height-1; terminal->margin_bottom = terminal->height-1;
@ -1629,7 +1629,7 @@ handle_escape(struct terminal *terminal)
terminal->column = 0; terminal->column = 0;
} }
break; break;
case 's': case 's': /* Save cursor location */
terminal->saved_row = terminal->row; terminal->saved_row = terminal->row;
terminal->saved_column = terminal->column; terminal->saved_column = terminal->column;
break; break;
@ -1676,7 +1676,7 @@ handle_escape(struct terminal *terminal)
fprintf(stderr, "Unimplemented windowOp %d\n", args[0]); fprintf(stderr, "Unimplemented windowOp %d\n", args[0]);
break; break;
} }
case 'u': case 'u': /* Restore cursor location */
terminal->row = terminal->saved_row; terminal->row = terminal->saved_row;
terminal->column = terminal->saved_column; terminal->column = terminal->saved_column;
break; break;
@ -1690,30 +1690,30 @@ static void
handle_non_csi_escape(struct terminal *terminal, char code) handle_non_csi_escape(struct terminal *terminal, char code)
{ {
switch(code) { switch(code) {
case 'M': /* RI */ case 'M': /* RI - Reverse linefeed */
terminal->row -= 1; terminal->row -= 1;
if (terminal->row < terminal->margin_top) { if (terminal->row < terminal->margin_top) {
terminal->row = terminal->margin_top; terminal->row = terminal->margin_top;
terminal_scroll(terminal, -1); terminal_scroll(terminal, -1);
} }
break; break;
case 'E': /* NEL */ case 'E': /* NEL - Newline */
terminal->column = 0; terminal->column = 0;
// fallthrough // fallthrough
case 'D': /* IND */ case 'D': /* IND - Linefeed */
terminal->row += 1; terminal->row += 1;
if (terminal->row > terminal->margin_bottom) { if (terminal->row > terminal->margin_bottom) {
terminal->row = terminal->margin_bottom; terminal->row = terminal->margin_bottom;
terminal_scroll(terminal, +1); terminal_scroll(terminal, +1);
} }
break; break;
case 'c': /* RIS */ case 'c': /* RIS - Reset*/
terminal_init(terminal); terminal_init(terminal);
break; break;
case 'H': /* HTS */ case 'H': /* HTS - Set tab stop at current column */
terminal->tab_ruler[terminal->column] = 1; terminal->tab_ruler[terminal->column] = 1;
break; break;
case '7': /* DECSC */ case '7': /* DECSC - Save current state */
terminal->saved_row = terminal->row; terminal->saved_row = terminal->row;
terminal->saved_column = terminal->column; terminal->saved_column = terminal->column;
terminal->saved_attr = terminal->curr_attr; terminal->saved_attr = terminal->curr_attr;
@ -1722,7 +1722,7 @@ handle_non_csi_escape(struct terminal *terminal, char code)
terminal->saved_g0 = terminal->g0; terminal->saved_g0 = terminal->g0;
terminal->saved_g1 = terminal->g1; terminal->saved_g1 = terminal->g1;
break; break;
case '8': /* DECRC */ case '8': /* DECRC - Restore state most recently saved by ESC 7 */
terminal->row = terminal->saved_row; terminal->row = terminal->saved_row;
terminal->column = terminal->saved_column; terminal->column = terminal->saved_column;
terminal->curr_attr = terminal->saved_attr; terminal->curr_attr = terminal->saved_attr;
@ -1731,10 +1731,10 @@ handle_non_csi_escape(struct terminal *terminal, char code)
terminal->g0 = terminal->saved_g0; terminal->g0 = terminal->saved_g0;
terminal->g1 = terminal->saved_g1; terminal->g1 = terminal->saved_g1;
break; break;
case '=': /* DECPAM */ case '=': /* DECPAM - Set application keypad mode */
terminal->key_mode = KM_APPLICATION; terminal->key_mode = KM_APPLICATION;
break; break;
case '>': /* DECPNM */ case '>': /* DECPNM - Set numeric keypad mode */
terminal->key_mode = KM_NORMAL; terminal->key_mode = KM_NORMAL;
break; break;
default: default:

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