diff options
Diffstat (limited to 'ncurses-5.9/form/frm_data.c')
| -rw-r--r-- | ncurses-5.9/form/frm_data.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/ncurses-5.9/form/frm_data.c b/ncurses-5.9/form/frm_data.c new file mode 100644 index 0000000..1778c02 --- /dev/null +++ b/ncurses-5.9/form/frm_data.c @@ -0,0 +1,193 @@ +/**************************************************************************** + * Copyright (c) 1998-2005,2010 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. * + ****************************************************************************/ + +/**************************************************************************** + * Author: Juergen Pfeifer, 1995,1997 * + ****************************************************************************/ + +#include "form.priv.h" + +MODULE_ID("$Id$") + +/*--------------------------------------------------------------------------- +| Facility : libnform +| Function : bool data_behind(const FORM *form) +| +| Description : Check for off-screen data behind. This is nearly trivial +| because the beginning of a field is fixed. +| +| Return Values : TRUE - there are off-screen data behind +| FALSE - there are no off-screen data behind ++--------------------------------------------------------------------------*/ +NCURSES_EXPORT(bool) +data_behind(const FORM *form) +{ + bool result = FALSE; + + T((T_CALLED("data_behind(%p)"), (const void *)form)); + + if (form && (form->status & _POSTED) && form->current) + { + FIELD *field; + + field = form->current; + if (!Single_Line_Field(field)) + { + result = (form->toprow == 0) ? FALSE : TRUE; + } + else + { + result = (form->begincol == 0) ? FALSE : TRUE; + } + } + returnBool(result); +} + +/*--------------------------------------------------------------------------- +| Facility : libnform +| Function : static char * Only_Padding( +| WINDOW *w, +| int len, +| int pad) +| +| Description : Test if 'length' cells starting at the current position +| contain a padding character. +| +| Return Values : true if only padding cells are found ++--------------------------------------------------------------------------*/ +NCURSES_INLINE static bool +Only_Padding(WINDOW *w, int len, int pad) +{ + bool result = TRUE; + int y, x, j; + FIELD_CELL cell; + + getyx(w, y, x); + for (j = 0; j < len; ++j) + { + if (wmove(w, y, x + j) != ERR) + { +#if USE_WIDEC_SUPPORT + if (win_wch(w, &cell) != ERR) + { + if ((chtype)CharOf(cell) != ChCharOf(pad) + || cell.chars[1] != 0) + { + result = FALSE; + break; + } + } +#else + cell = winch(w); + if (ChCharOf(cell) != ChCharOf(pad)) + { + result = FALSE; + break; + } +#endif + } + else + { + /* if an error, return true: no non-padding text found */ + break; + } + } + /* no need to reset the cursor position; caller does this */ + return result; +} + +/*--------------------------------------------------------------------------- +| Facility : libnform +| Function : bool data_ahead(const FORM *form) +| +| Description : Check for off-screen data ahead. This is more difficult +| because a dynamic field has a variable end. +| +| Return Values : TRUE - there are off-screen data ahead +| FALSE - there are no off-screen data ahead ++--------------------------------------------------------------------------*/ +NCURSES_EXPORT(bool) +data_ahead(const FORM *form) +{ + bool result = FALSE; + + T((T_CALLED("data_ahead(%p)"), (const void *)form)); + + if (form && (form->status & _POSTED) && form->current) + { + FIELD *field; + bool cursor_moved = FALSE; + int pos; + + field = form->current; + assert(form->w); + + if (Single_Line_Field(field)) + { + int check_len; + + pos = form->begincol + field->cols; + while (pos < field->dcols) + { + check_len = field->dcols - pos; + if (check_len >= field->cols) + check_len = field->cols; + cursor_moved = TRUE; + wmove(form->w, 0, pos); + if (Only_Padding(form->w, check_len, field->pad)) + pos += field->cols; + else + { + result = TRUE; + break; + } + } + } + else + { + pos = form->toprow + field->rows; + while (pos < field->drows) + { + cursor_moved = TRUE; + wmove(form->w, pos, 0); + pos++; + if (!Only_Padding(form->w, field->cols, field->pad)) + { + result = TRUE; + break; + } + } + } + + if (cursor_moved) + wmove(form->w, form->currow, form->curcol); + } + returnBool(result); +} + +/* frm_data.c ends here */ |