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/**************************************************************************** * Copyright (c) 2003-2008,2011 Free Software Foundation, Inc. * * * * Permission is hereby granted, free of charge, to any person obtaining a * * copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, distribute with modifications, sublicense, and/or sell * * copies of the Software, and to permit persons to whom the Software is * * furnished to do so, subject to the following conditions: * * * * The above copyright notice and this permission notice shall be included * * in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * * * Except as contained in this notice, the name(s) of the above copyright * * holders shall not be used in advertising or otherwise to promote the * * sale, use or other dealings in this Software without prior written * * authorization. * ***************************************************************************/ / * $Id: edit_field.c,v 1.17 2011/01/15 18:15:11 tom Exp $ * * A wrapper for form_driver() which keeps track of the user's editing changes * for each field, and makes the result available as a null-terminated string * in field_buffer(field,1). * * Thomas Dickey - 2003/4/26. / #include <test.priv.h> #if USE_LIBFORM #include <edit_field.h> static struct { int code; int result; const char help; } commands[] = { { CTRL('A'), REQ_NEXT_CHOICE, "" }, { CTRL('B'), REQ_PREV_WORD, "go to previous word" }, { CTRL('C'), REQ_CLR_EOL, "clear to end of line" }, { CTRL('D'), REQ_DOWN_FIELD, "move downward to field" }, { CTRL('E'), REQ_END_FIELD, "go to end of field" }, { CTRL('F'), REQ_NEXT_PAGE, "go to next page" }, { CTRL('G'), REQ_DEL_WORD, "delete current word" }, { CTRL('H'), REQ_DEL_PREV, "delete previous character" }, { CTRL('I'), REQ_INS_CHAR, "insert character" }, { CTRL('K'), REQ_CLR_EOF, "clear to end of field" }, { CTRL('L'), REQ_LEFT_FIELD, "go to field to left" }, { CTRL('M'), REQ_NEW_LINE, "insert/overlay new line" }, { CTRL('N'), REQ_NEXT_FIELD, "go to next field" }, { CTRL('O'), REQ_INS_LINE, "insert blank line at cursor" }, { CTRL('P'), REQ_PREV_FIELD, "go to previous field" }, { CTRL('Q'), MY_QUIT, "exit form" }, { CTRL('R'), REQ_RIGHT_FIELD, "go to field to right" }, { CTRL('S'), REQ_BEG_FIELD, "go to beginning of field" }, { CTRL('T'), MY_EDT_MODE, "toggle O_EDIT mode, clear field status", }, { CTRL('U'), REQ_UP_FIELD, "move upward to field" }, { CTRL('V'), REQ_DEL_CHAR, "delete character" }, { CTRL('W'), REQ_NEXT_WORD, "go to next word" }, { CTRL('X'), REQ_CLR_FIELD, "clear field" }, { CTRL('Y'), REQ_DEL_LINE, "delete line" }, { CTRL('Z'), REQ_PREV_CHOICE, "" }, { CTRL('['), MY_QUIT, "exit form" }, { CTRL(']'), MY_INS_MODE, "toggle REQ_INS_MODE/REQ_OVL_MODE", }, { KEY_F(1), MY_HELP, "show this screen", }, { KEY_BACKSPACE, REQ_DEL_PREV, "delete previous character" }, { KEY_DOWN, REQ_DOWN_CHAR, "move down 1 character" }, { KEY_END, REQ_LAST_FIELD, "go to last field" }, { KEY_HOME, REQ_FIRST_FIELD, "go to first field" }, { KEY_LEFT, REQ_LEFT_CHAR, "move left 1 character" }, { KEY_LL, REQ_LAST_FIELD, "go to last field" }, { KEY_NEXT, REQ_NEXT_FIELD, "go to next field" }, { KEY_NPAGE, REQ_NEXT_PAGE, "go to next page" }, { KEY_PPAGE, REQ_PREV_PAGE, "go to previous page" }, { KEY_PREVIOUS, REQ_PREV_FIELD, "go to previous field" }, { KEY_RIGHT, REQ_RIGHT_CHAR, "move right 1 character" }, { KEY_UP, REQ_UP_CHAR, "move up 1 character" } }; static WINDOW old_window; static void begin_popup(void) { doupdate(); old_window = dupwin(curscr); } static void end_popup(void) { touchwin(old_window); wnoutrefresh(old_window); doupdate(); delwin(old_window); } / * Display a temporary window listing the keystroke-commands we recognize. / void help_edit_field(void) { int x0 = 4; int y0 = 2; int y1 = 0; int y2 = 0; int wide = COLS - ((x0 + 1) 2); int high = LINES - ((y0 + 1) * 2); WINDOW help = newwin(high, wide, y0, x0); WINDOW data = newpad(2 + SIZEOF(commands), wide - 4); unsigned n; int ch = ERR; begin_popup(); keypad(help, TRUE); keypad(data, TRUE); waddstr(data, "Defined form edit/traversal keys:\n"); for (n = 0; n < SIZEOF(commands); ++n) { const char name; #ifdef NCURSES_VERSION if ((name = form_request_name(commands[n].result)) == 0) #endif name = commands[n].help; wprintw(data, "%s -- %s\n", keyname(commands[n].code), name != 0 ? name : commands[n].help); } waddstr(data, "Arrow keys move within a field as you would expect."); y2 = getcury(data); do { switch (ch) { case KEY_HOME: y1 = 0; break; case KEY_END: y1 = y2; break; case KEY_PREVIOUS: case KEY_PPAGE: if (y1 > 0) { y1 -= high / 2; if (y1 < 0) y1 = 0; } else { beep(); } break; case KEY_NEXT: case KEY_NPAGE: if (y1 < y2) { y1 += high / 2; if (y1 >= y2) y1 = y2; } else { beep(); } break; case CTRL('P'): case KEY_UP: if (y1 > 0) --y1; else beep(); break; case CTRL('N'): case KEY_DOWN: if (y1 < y2) ++y1; else beep(); break; default: beep(); break; case ERR: break; } werase(help); box(help, 0, 0); wnoutrefresh(help); pnoutrefresh(data, y1, 0, y0 + 1, x0 + 1, high, wide); doupdate(); } while ((ch = wgetch(data)) != ERR && ch != QUIT && ch != ESCAPE); werase(help); wrefresh(help); delwin(help); delwin(data); end_popup(); } static int offset_in_field(FORM form) { FIELD field = current_field(form); int currow, curcol; form_getyx(form, currow, curcol); return curcol + currow field->dcols; } static void inactive_field(FIELD * f) { FieldAttrs ptr = (FieldAttrs ) field_userptr(f); set_field_back(f, ptr->background); } int edit_field(FORM * form, int result) { int ch = wgetch(form_win(form)); int status; FIELD before; unsigned n; char lengths[80]; int length; char buffer; int before_row; int before_col; int before_off = offset_in_field(form); form_getyx(form, before_row, before_col); before = current_field(form); set_field_back(before, A_NORMAL); if (ch <= KEY_MAX) { set_field_back(before, A_REVERSE); } else if (ch <= MAX_FORM_COMMAND) { inactive_field(before); } result = ch; for (n = 0; n < SIZEOF(commands); ++n) { if (commands[n].code == ch) { result = commands[n].result; break; } } status = form_driver(form, result); if (status == E_OK) { bool modified = TRUE; length = 0; if ((buffer = field_buffer(before, 1)) != 0) length = atoi(buffer); if (length < before_off) length = before_off; switch (result) { case REQ_CLR_EOF: length = before_off; break; case REQ_CLR_EOL: if (before_row + 1 == before->rows) length = before_off; break; case REQ_CLR_FIELD: length = 0; break; case REQ_DEL_CHAR: if (length > before_off) --length; break; case REQ_DEL_PREV: if (length > 0) { if (before_col > 0) { --length; } else if (before_row > 0) { length -= before->cols + before_col; } } break; case REQ_NEW_LINE: length += before->cols; break; #if 0 / FIXME: finish these / case REQ_DEL_LINE: / delete line / case REQ_DEL_WORD: / delete word at cursor / case REQ_INS_CHAR: / insert blank char at cursor / case REQ_INS_LINE: / insert blank line at cursor / case REQ_INS_MODE: / begin insert mode / case REQ_OVL_MODE: / begin overlay mode / #endif / ignore all of the motion commands / case REQ_SCR_BCHAR: / FALLTHRU / case REQ_SCR_BHPAGE: / FALLTHRU / case REQ_SCR_BLINE: / FALLTHRU / case REQ_SCR_BPAGE: / FALLTHRU / case REQ_SCR_FCHAR: / FALLTHRU / case REQ_SCR_FHPAGE: / FALLTHRU / case REQ_SCR_FLINE: / FALLTHRU / case REQ_SCR_FPAGE: / FALLTHRU / case REQ_SCR_HBHALF: / FALLTHRU / case REQ_SCR_HBLINE: / FALLTHRU / case REQ_SCR_HFHALF: / FALLTHRU / case REQ_SCR_HFLINE: / FALLTHRU / case REQ_BEG_FIELD: / FALLTHRU / case REQ_BEG_LINE: / FALLTHRU / case REQ_DOWN_CHAR: / FALLTHRU / case REQ_DOWN_FIELD: / FALLTHRU / case REQ_END_FIELD: / FALLTHRU / case REQ_END_LINE: / FALLTHRU / case REQ_FIRST_FIELD: / FALLTHRU / case REQ_FIRST_PAGE: / FALLTHRU / case REQ_LAST_FIELD: / FALLTHRU / case REQ_LAST_PAGE: / FALLTHRU / case REQ_LEFT_CHAR: / FALLTHRU / case REQ_LEFT_FIELD: / FALLTHRU / case REQ_NEXT_CHAR: / FALLTHRU / case REQ_NEXT_CHOICE: / FALLTHRU / case REQ_NEXT_FIELD: / FALLTHRU / case REQ_NEXT_LINE: / FALLTHRU / case REQ_NEXT_PAGE: / FALLTHRU / case REQ_NEXT_WORD: / FALLTHRU / case REQ_PREV_CHAR: / FALLTHRU / case REQ_PREV_CHOICE: / FALLTHRU / case REQ_PREV_FIELD: / FALLTHRU / case REQ_PREV_LINE: / FALLTHRU / case REQ_PREV_PAGE: / FALLTHRU / case REQ_PREV_WORD: / FALLTHRU / case REQ_RIGHT_CHAR: / FALLTHRU / case REQ_RIGHT_FIELD: / FALLTHRU / case REQ_SFIRST_FIELD: / FALLTHRU / case REQ_SLAST_FIELD: / FALLTHRU / case REQ_SNEXT_FIELD: / FALLTHRU / case REQ_SPREV_FIELD: / FALLTHRU / case REQ_UP_CHAR: / FALLTHRU / case REQ_UP_FIELD: / FALLTHRU / case REQ_VALIDATION: / FALLTHRU / modified = FALSE; break; default: modified = FALSE; if (ch >= MIN_FORM_COMMAND) { beep(); } else if (isprint(ch)) { modified = TRUE; } break; } / * If we do not force a re-validation, then field_buffer 0 will * be lagging by one character. / if (modified && form_driver(form, REQ_VALIDATION) == E_OK && result < MIN_FORM_COMMAND) ++length; sprintf(lengths, "%d", length); set_field_buffer(before, 1, lengths); } if (current_field(form) != before) inactive_field(before); return status; } #else extern void no_edit_field(void); void no_edit_field(void) { } #endif

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