terminal: Document console codes less cryptically
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>
This commit is contained in:
Bryce Harrington
parent
b4dae9beff
commit
f013ce96c5
@ -1333,12 +1333,12 @@ handle_escape(struct terminal *terminal)
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}
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switch (*p) {
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case '@': /* ICH */
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case '@': /* ICH - Insert <count> blank characters */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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terminal_shift_line(terminal, count);
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break;
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case 'A': /* CUU */
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case 'A': /* CUU - Move cursor up <count> rows */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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if (terminal->row - count >= terminal->margin_top)
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@ -1346,7 +1346,7 @@ handle_escape(struct terminal *terminal)
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else
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terminal->row = terminal->margin_top;
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break;
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case 'B': /* CUD */
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case 'B': /* CUD - Move cursor down <count> rows */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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if (terminal->row + count <= terminal->margin_bottom)
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@ -1354,7 +1354,7 @@ handle_escape(struct terminal *terminal)
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else
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terminal->row = terminal->margin_bottom;
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break;
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case 'C': /* CUF */
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case 'C': /* CUF - Move cursor right by <count> columns */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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if ((terminal->column + count) < terminal->width)
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@ -1362,7 +1362,7 @@ handle_escape(struct terminal *terminal)
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else
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terminal->column = terminal->width - 1;
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break;
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case 'D': /* CUB */
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case 'D': /* CUB - Move cursor left <count> columns */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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if ((terminal->column - count) >= 0)
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@ -1370,7 +1370,7 @@ handle_escape(struct terminal *terminal)
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else
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terminal->column = 0;
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break;
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case 'E': /* CNL */
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case 'E': /* CNL - Move cursor down <count> rows, to column 1 */
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count = set[0] ? args[0] : 1;
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if (terminal->row + count <= terminal->margin_bottom)
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terminal->row += count;
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@ -1378,7 +1378,7 @@ handle_escape(struct terminal *terminal)
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terminal->row = terminal->margin_bottom;
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terminal->column = 0;
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break;
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case 'F': /* CPL */
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case 'F': /* CPL - Move cursour up <count> rows, to column 1 */
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count = set[0] ? args[0] : 1;
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if (terminal->row - count >= terminal->margin_top)
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terminal->row -= count;
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@ -1386,14 +1386,14 @@ handle_escape(struct terminal *terminal)
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terminal->row = terminal->margin_top;
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terminal->column = 0;
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break;
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case 'G': /* CHA */
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case 'G': /* CHA - Move cursor to column <y> in current row */
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y = set[0] ? args[0] : 1;
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y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y;
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terminal->column = y - 1;
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break;
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case 'f': /* HVP */
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case 'H': /* CUP */
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case 'f': /* HVP - Move cursor to <x, y> */
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case 'H': /* CUP - Move cursor to <x, y> (origin at 1,1) */
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x = (set[1] ? args[1] : 1) - 1;
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x = x < 0 ? 0 :
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(x >= terminal->width ? terminal->width - 1 : x);
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@ -1420,7 +1420,7 @@ handle_escape(struct terminal *terminal)
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}
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terminal->column--;
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break;
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case 'J': /* ED */
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case 'J': /* ED - Erase display */
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row = terminal_get_row(terminal, terminal->row);
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attr_row = terminal_get_attr_row(terminal, terminal->row);
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if (!set[0] || args[0] == 0 || args[0] > 2) {
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@ -1449,7 +1449,7 @@ handle_escape(struct terminal *terminal)
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terminal->end - terminal->start);
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}
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break;
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case 'K': /* EL */
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case 'K': /* EL - Erase line */
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row = terminal_get_row(terminal, terminal->row);
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attr_row = terminal_get_attr_row(terminal, terminal->row);
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if (!set[0] || args[0] == 0 || args[0] > 2) {
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@ -1465,7 +1465,7 @@ handle_escape(struct terminal *terminal)
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attr_init(attr_row, terminal->curr_attr, terminal->width);
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}
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break;
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case 'L': /* IL */
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case 'L': /* IL - Insert <count> blank lines */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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if (terminal->row >= terminal->margin_top &&
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@ -1482,7 +1482,7 @@ handle_escape(struct terminal *terminal)
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terminal->curr_attr, terminal->width);
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}
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break;
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case 'M': /* DL */
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case 'M': /* DL - Delete <count> lines */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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if (terminal->row >= terminal->margin_top &&
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@ -1497,7 +1497,7 @@ handle_escape(struct terminal *terminal)
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0, terminal->data_pitch);
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}
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break;
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case 'P': /* DCH */
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case 'P': /* DCH - Delete <count> characters on current line */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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terminal_shift_line(terminal, 0 - count);
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@ -1508,7 +1508,7 @@ handle_escape(struct terminal *terminal)
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case 'T': /* SD */
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terminal_scroll(terminal, 0 - (set[0] ? args[0] : 1));
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break;
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case 'X': /* ECH */
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case 'X': /* ECH - Erase <count> characters on current line */
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count = set[0] ? args[0] : 1;
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if (count == 0) count = 1;
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if ((terminal->column + count) > terminal->width)
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@ -1527,7 +1527,7 @@ handle_escape(struct terminal *terminal)
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}
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terminal->column++;
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break;
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case '`': /* HPA */
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case '`': /* HPA - Move cursor to <y> column in current row */
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y = set[0] ? args[0] : 1;
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y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y;
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@ -1541,33 +1541,33 @@ handle_escape(struct terminal *terminal)
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handle_char(terminal, terminal->last_char);
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terminal->last_char.byte[0] = 0;
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break;
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case 'c': /* Primary DA */
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case 'c': /* Primary DA - Answer "I am a VT102" */
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terminal_write(terminal, "\e[?6c", 5);
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break;
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case 'd': /* VPA */
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case 'd': /* VPA - Move cursor to <x> row, current column */
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x = set[0] ? args[0] : 1;
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x = x <= 0 ? 1 : x > terminal->height ? terminal->height : x;
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terminal->row = x - 1;
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break;
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case 'g': /* TBC */
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case 'g': /* TBC - Clear tab stop(s) */
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if (!set[0] || args[0] == 0) {
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terminal->tab_ruler[terminal->column] = 0;
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} else if (args[0] == 3) {
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memset(terminal->tab_ruler, 0, terminal->width);
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}
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break;
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case 'h': /* SM */
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case 'h': /* SM - Set mode */
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for (i = 0; i < 10 && set[i]; i++) {
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handle_term_parameter(terminal, args[i], 1);
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}
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break;
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case 'l': /* RM */
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case 'l': /* RM - Reset mode */
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for (i = 0; i < 10 && set[i]; i++) {
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handle_term_parameter(terminal, args[i], 0);
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}
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break;
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case 'm': /* SGR */
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case 'm': /* SGR - Set attributes */
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for (i = 0; i < 10; i++) {
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if (i <= 7 && set[i] && set[i + 1] &&
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set[i + 2] && args[i + 1] == 5)
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@ -1590,7 +1590,7 @@ handle_escape(struct terminal *terminal)
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}
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}
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break;
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case 'n': /* DSR */
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case 'n': /* DSR - Status report */
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i = set[0] ? args[0] : 0;
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if (i == 0 || i == 5) {
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terminal_write(terminal, "\e[0n", 4);
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@ -1602,7 +1602,7 @@ handle_escape(struct terminal *terminal)
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terminal_write(terminal, response, strlen(response));
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}
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break;
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case 'r':
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case 'r': /* DECSTBM - Set scrolling region */
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if (!set[0]) {
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terminal->margin_top = 0;
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terminal->margin_bottom = terminal->height-1;
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@ -1629,7 +1629,7 @@ handle_escape(struct terminal *terminal)
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terminal->column = 0;
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}
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break;
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case 's':
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case 's': /* Save cursor location */
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terminal->saved_row = terminal->row;
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terminal->saved_column = terminal->column;
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break;
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@ -1676,7 +1676,7 @@ handle_escape(struct terminal *terminal)
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fprintf(stderr, "Unimplemented windowOp %d\n", args[0]);
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break;
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}
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case 'u':
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case 'u': /* Restore cursor location */
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terminal->row = terminal->saved_row;
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terminal->column = terminal->saved_column;
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break;
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@ -1690,30 +1690,30 @@ static void
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handle_non_csi_escape(struct terminal *terminal, char code)
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{
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switch(code) {
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case 'M': /* RI */
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case 'M': /* RI - Reverse linefeed */
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terminal->row -= 1;
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if (terminal->row < terminal->margin_top) {
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terminal->row = terminal->margin_top;
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terminal_scroll(terminal, -1);
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}
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break;
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case 'E': /* NEL */
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case 'E': /* NEL - Newline */
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terminal->column = 0;
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// fallthrough
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case 'D': /* IND */
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case 'D': /* IND - Linefeed */
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terminal->row += 1;
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if (terminal->row > terminal->margin_bottom) {
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terminal->row = terminal->margin_bottom;
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terminal_scroll(terminal, +1);
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}
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break;
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case 'c': /* RIS */
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case 'c': /* RIS - Reset*/
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terminal_init(terminal);
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break;
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case 'H': /* HTS */
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case 'H': /* HTS - Set tab stop at current column */
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terminal->tab_ruler[terminal->column] = 1;
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break;
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case '7': /* DECSC */
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case '7': /* DECSC - Save current state */
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terminal->saved_row = terminal->row;
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terminal->saved_column = terminal->column;
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terminal->saved_attr = terminal->curr_attr;
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@ -1722,7 +1722,7 @@ handle_non_csi_escape(struct terminal *terminal, char code)
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terminal->saved_g0 = terminal->g0;
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terminal->saved_g1 = terminal->g1;
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break;
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case '8': /* DECRC */
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case '8': /* DECRC - Restore state most recently saved by ESC 7 */
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terminal->row = terminal->saved_row;
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terminal->column = terminal->saved_column;
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terminal->curr_attr = terminal->saved_attr;
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@ -1731,10 +1731,10 @@ handle_non_csi_escape(struct terminal *terminal, char code)
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terminal->g0 = terminal->saved_g0;
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terminal->g1 = terminal->saved_g1;
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break;
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case '=': /* DECPAM */
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case '=': /* DECPAM - Set application keypad mode */
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terminal->key_mode = KM_APPLICATION;
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break;
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case '>': /* DECPNM */
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case '>': /* DECPNM - Set numeric keypad mode */
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terminal->key_mode = KM_NORMAL;
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break;
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default:
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