diff options
Diffstat (limited to 'Source/CursesDialog/form/frm_data.c')
| -rw-r--r-- | Source/CursesDialog/form/frm_data.c | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/Source/CursesDialog/form/frm_data.c b/Source/CursesDialog/form/frm_data.c new file mode 100644 index 0000000..a96b4f1 --- /dev/null +++ b/Source/CursesDialog/form/frm_data.c @@ -0,0 +1,181 @@ +/**************************************************************************** + * Copyright (c) 1998 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 <juergen.pfeifer@gmx.net> 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 +| becose the begin of a field is fixed. +| +| Return Values : TRUE - there are off-screen data behind +| FALSE - there are no off-screen data behind ++--------------------------------------------------------------------------*/ +bool data_behind(const FORM *form) +{ + bool result = FALSE; + + 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; + } + } + return(result); +} + +/*--------------------------------------------------------------------------- +| Facility : libnform +| Function : static char * After_Last_Non_Pad_Position( +| char *buffer, +| int len, +| int pad) +| +| Description : Find the last position in the buffer that doesn't +| contain a padding character. +| +| Return Values : The pointer to this position ++--------------------------------------------------------------------------*/ +INLINE +static char * After_Last_Non_Pad_Position(char *buffer, int len, int pad) +{ + char *end = buffer + len; + + assert(buffer && len>=0); + while ( (buffer < end) && (*(end-1)==pad) ) + end--; + + return end; +} + +#define SMALL_BUFFER_SIZE (80) + +/*--------------------------------------------------------------------------- +| 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 ++--------------------------------------------------------------------------*/ +bool data_ahead(const FORM *form) +{ + bool result = FALSE; + + if (form && (form->status & _POSTED) && form->current) + { + static char buffer[SMALL_BUFFER_SIZE + 1]; + FIELD *field; + bool large_buffer; + bool cursor_moved = FALSE; + char *bp; + char *found_content; + int pos; + + field = form->current; + assert(form->w); + + large_buffer = (field->cols > SMALL_BUFFER_SIZE); + if (large_buffer) + bp = (char *)malloc((size_t)(field->cols) + 1); + else + bp = buffer; + + assert(bp); + + 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); + winnstr(form->w,bp,check_len); + found_content = + After_Last_Non_Pad_Position(bp,check_len,field->pad); + if (found_content==bp) + 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++; + winnstr(form->w,bp,field->cols); + found_content = + After_Last_Non_Pad_Position(bp,field->cols,field->pad); + if (found_content!=bp) + { + result = TRUE; + break; + } + } + } + + if (large_buffer) + free(bp); + + if (cursor_moved) + wmove(form->w,form->currow,form->curcol); + } + return(result); +} + +/* frm_data.c ends here */ |