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block.c
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1996-09-26
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/******************************************************************************
MODUL
block.c
DESCRIPTION
In this module are all functions that work with blocks.
NOTES
- A block has these attributes:
1- the editor it is in
2- the type (BT_NONE, BT_LINE, BT_NORMAL or BT_VERTICAL)
if it is BT_NONE, there is no block.
3- a start-position (line/column). If the type is not BT_NONE,
this field is guranteed to contain a valid position.
4- an end-position. If the line is -1, the end-position is not
yet defined.
******************************************************************************/
/**************************************
Includes
**************************************/
#include <defs.h>
#include "clipboard.h"
#define MYDEBUG 1
#include "debug.h"
/**************************************
Globale Variable
**************************************/
Prototype UWORD is_inblock (Line, Column);
Prototype void displayblock (BOOL);
Prototype void redraw_block (BOOL, Line, Column, Line, Column);
Prototype void do_blocktype (void);
Prototype void do_block (void);
Prototype BOOL block_ok (void);
Prototype void do_copy (void);
Prototype char * block_to_string (void);
Prototype void do_bdelete (void);
Prototype void do_bcopy (void);
Prototype void do_bmove (void);
Prototype void do_bsource (void);
/**************************************
Interne Defines & Strukturen
**************************************/
#define SWAP(a,b) (void)((a)^=(b),(b)^=(a),(a)^=(b))
#define MIN(a,b) ((a) <= (b) ? (a) : (b))
#define MAX(a,b) ((a) >= (b) ? (a) : (b))
#define BF_LINESWAP 1L
#define BF_COLUMNSWAP 2L
/**************************************
Interne Variable
**************************************/
static UWORD block_type = BT_LINE; /* default-type of block */
/**************************************
Interne Prototypes
**************************************/
/*****************************************************************************
NAME
is_inblock
PARAMETER
Line line; The line we want to check
Column column; the column we are in. If column == -1,
we just check the line.
RETURN
UWORD blockpos; Flags:
BP_OUTSIDE we are not inside any block.
BP_START we are in the line where the block starts.
BP_END we are in the line where the block ends.
BP_INSIDE we are really inside the block.
DESCRIPTION
This function checks whether a position is inside a block.
If it isn't, we get BP_OUTSIDE (= 0). In the other case, we
have several flags. If line is the start-line of the block,
BP_START is set. The same goes for the end-line.
Normal and vertical blocks also check for the column.
If we don't care for this, we may simply specify -1L for the
column. Else, we give the column we want to check and get an
additional BP_INSIDE if we are really inside the block.
EXAMPLE
BP_OUTSIDE there is no block in that line
BP_START the line is the start-line of the block. Also the
block has more than one line since BP_END is not
set. The block is not a line-block (BP_INSIDE is
always true for line-blocks !).
BP_START|BP_END The block has only one line and we are in it. This is
also no line-block.
BP_START|BP_INSIDE We are inside the block and on it's start-line.
BP_INSIDE this position is inside the block, but not in the
start- nor in the end-line.
******************************************************************************/
UWORD is_inblock (Line line, Column col)
{
UWORD blockpos = BP_OUTSIDE;
/* Look if there is a block, the actual editor is the one that
has it, we are not in a commandline and the line is inside it.
NOTE: if there is no end-line yet, the last condition can never
be TRUE ! */
if ( ActualBlock.type != BT_NONE &&
Ep == ActualBlock.ep &&
!globalflags.Comlinemode &&
line >= ActualBlock.start_line &&
line <= ActualBlock.end_line )
{
/* Check for start- and end-line */
if (line == ActualBlock.start_line)
blockpos |= BP_START;
if (line == ActualBlock.end_line)
blockpos |= BP_END;
/* now check, if we are inside the block */
switch (ActualBlock.type)
{
case BT_LINE:
/* in a line-block, we are always inside */
blockpos |= BP_INSIDE;
break;
case BT_NORMAL:
{
BOOL after_start, before_end;
/* in a normal block, we must also check the column.
In the startline, we are inside the block if we are to the
left of the startcolumn. In the endline, we must be to
the right. */
/* NOTE that we check the lines above ! */
if (line > ActualBlock.start_line ||
(col == -1 || col >= ActualBlock.start_column)
)
after_start = TRUE;
else
after_start = FALSE;
if (line < ActualBlock.end_line ||
(col == -1 || col <= ActualBlock.end_column ||
ActualBlock.end_column == (LINELEN(Ep,line)) )
)
before_end = TRUE;
else
before_end = FALSE;
if (after_start && before_end)
blockpos |= BP_INSIDE;
}
break;
case BT_VERTICAL:
/* in a vertical block, we must be between the start- and the
end-column */
if (( col == -1 ||
( col >= ActualBlock.start_column &&
col <= ActualBlock.end_column ) ) &&
line >= ActualBlock.start_line &&
line <= ActualBlock.end_line )
blockpos |= BP_INSIDE;
break;
} /* switch (ActualBlock.type) */
} /* if validblock */
/* return the flags */
return (blockpos);
} /* is_inblock */
/*****************************************************************************
NAME
displayblock
PARAMETER
BOOL on; Shall we turn the block on ?
RETURN
void
DESCRIPTION
This function displays the block. If on is TRUE, the block
is drawn (again), else we turn the block off. In this case, the
block-selection is lost !
******************************************************************************/
void displayblock (BOOL on)
{
if (on)
{
/* draw block and write the text over it */
redraw_block (TRUE,
Ep->topline, Ep->topcolumn,
Ep->topline + Lines - 1, Ep->topcolumn + Columns - 1);
} else if (block_ok ()) /* turn block off AND there was a block */
{
ED * ep = Ep;
RP * rp = ep->win->RPort;
UWORD start;
UWORD end;
/* no block anymore */
ActualBlock.type = BT_NONE;
ActualBlock.ep = NULL;
/* block is not visible */
if (ActualBlock.end_line < ep->topline)
return;
/* start-line: If block starts above the 1st visible line,
we start in line 0 else in the line where the block starts. */
if (ActualBlock.start_line < ep->topline)
start = ep->topline;
else
start = ActualBlock.start_line;
/* is end-line visible ? */
if (ep->topline + Lines > ActualBlock.end_line)
end = ActualBlock.end_line;
else
/* only upto the end of the display */
end = ep->topline + Lines -1;
if (start <= end)
{
/* color and mask */
SetAPen (rp, TEXT_BPEN);
SetWrMsk (rp, BLOCK_MASK);
/* clear area */
RectFill (rp, Xbase, ROW(start - Ep->topline), Xpixs,
ROW(end-Ep->topline + 1)-1);
/* redraw text */
redraw_block (TRUE, start, ep->topcolumn,
end, ep->topcolumn + Columns -1);
}
} else /* just say "there is no block" */
ActualBlock.type = BT_NONE;
} /* displayblock */
/*****************************************************************************
NAME
do_blocktype
PARAMETER
av[0] : blocktype
av[1] : LINE/CHARACTER/NORMAL/VERTICAL
RETURN
void
DESCRIPTION
This sets the type of block you want to use. Allowed are 3 types
of blocks:
LINE: The line-block begins in a line and ends in a line.
The columns are ignored and both lines are included
in the block.
CHARCTER or NORMAL: The character-block begins at a specifiy line
and columns and ends at another character-position.
VERTICAL: The vertical block is a rectangular region of text
like a column of a table.
If you have already marked a block, it is converted to the new type.
******************************************************************************/
void do_blocktype (void)
{
switch (av[1][0])
{
case 'l':
case 'L':
block_type = BT_LINE;
break;
case 'c':
case 'C':
case 'n':
case 'N':
block_type = BT_NORMAL;
break;
case 'v':
case 'V':
block_type = BT_VERTICAL;
break;
}
/* check if there is a block and convert the type */
if (block_ok() && ActualBlock.type != block_type)
{
/* set new type */
ActualBlock.type = block_type;
if (block_type == BT_NORMAL)
{
int linelen;
/* check start and end-columns */
linelen = LINELEN(Ep,ActualBlock.start_line);
if (linelen < ActualBlock.start_column)
ActualBlock.start_column = linelen;
linelen = LINELEN(Ep,ActualBlock.end_line);
if (linelen < ActualBlock.end_column)
ActualBlock.end_column = linelen;
}
/* clean screen and force redraw */
text_redisplay ();
}
} /* do_blocktype */
/*****************************************************************************
NAME
do_block
PARAMETER
av[0] : block unblock bstart bend lineblock
RETURN
void
DESCRIPTION
This routine allows to specify the limits of a block.
The two commands BSTART and BEND can be used anywhere in the
text (ie. you can user BEND above a BSTART). In this case,
BEND and BSTART swap their meanings, ie. BEND now sets the start
of the block and BSTART the end. This is for specifying a block
with the mouse. If you drag the mouse above the BSTART, the BEND
will begin to set the beginning of the block and if you drag it
down over the end of the block, BEND will switch back.
******************************************************************************/
void do_block (void)
{
ED * ep = Ep;
/* make sure we work on the most recent version of the text */
text_sync ();
/* look for the 1st character */
switch(av[0][0])
{
case 'b': /* Block Bstart Bend */
switch (av[0][1]) /* b[lse] */
{
case 'l': /* BLock */
/* if there is no block yet, we set the start-line */
if (ActualBlock.type == BT_NONE)
{
bstart:
/* set the editor, the start-line and the type. To
make clear the end-line is not valid yet, we set
it to -1 */
ActualBlock.ep = ep;
ActualBlock.type = block_type;
ActualBlock.start_line = ep->line;
ActualBlock.start_column = ep->column;
ActualBlock.end_line = -1;
ActualBlock.flags = 0;
title ("Block begin");
} else
{
/* if there is a block */
if (block_ok ())
{
/* shall we automagically unblock ? */
if (ep->config.autounblock)
{
/* trun block off */
text_redrawblock (0);
/* set start */
goto bstart;
} else
{
/* no auto-unblock ? ERROR ! */
error ("block:\nBlock already marked");
break;
} /* autounblock */
} /* if there is already a block */
/* The last BLOCK began in another editor: Restart ! */
if (ActualBlock.ep != ep)
goto bstart;
ActualBlock.end_line = ep->line;
ActualBlock.end_column = ep->column;
/* now, the block is ready ! */
title ("Block end");
text_redrawblock (1); /* Now display */
}
break;
case 's': /* BStart */
/* no block yet or the old block was in another editor ? */
if (ActualBlock.type == BT_NONE || ActualBlock.ep != ep)
{
/* is there an old block and the editor that contains
the block is not iconified */
if (ActualBlock.type != BT_NONE &&
!ActualBlock.ep->iconmode)
{
/* change editor */
switch_ed (ActualBlock.ep);
/* switch block off */
text_redrawblock (0);
/* come back */
switch_ed (ep);
}
goto bstart;
}
if (ActualBlock.end_line != -1)
{
redraw_block (FALSE,
ep->line,
ep->column,
-1, -1);
} else
{
ActualBlock.start_line = ep->line;
ActualBlock.start_column = ep->column;
title ("Block begin");
}
break;
case 'e': /* bend */
/* It is not possible to use BEND if there is no
start yet or the block is in another editor */
if (ActualBlock.type == BT_NONE)
{
error ("bend:\n You must use BLOCK or\nBSTART first");
break;
} else if (ActualBlock.ep != ep)
{
error ("bend:\nYou cannot set the end for\n"
"a block in another editor !");
break;
}
/* say what we do */
title ("Block end");
/* if there was no end yet, just set it and force
a redisplay */
if (ActualBlock.end_line == -1)
{
ActualBlock.end_line = ep->line;
ActualBlock.end_column = ep->column;
text_redrawblock (1); /* Now display */
} else
{
redraw_block (FALSE,
-1, -1,
ep->line, ep->column);
}
break;
}
break;
case 'u':
/* force UNDRAW and say what we did */
text_redrawblock (0);
title ("Block unmarked");
break;
case 'l':
/* mark the whole line as a block */
ActualBlock.ep = ep;
ActualBlock.type = BT_NORMAL;
ActualBlock.start_line =
ActualBlock.end_line = ep->line;
ActualBlock.start_column = 0;
ActualBlock.end_column = Clen;
ActualBlock.flags = 0;
title ("Line marked");
/* force redraw */
text_redrawblock (1);
break;
}
} /* do_block */
/*****************************************************************************
NAME
block_ok
PARAMETER
void
RETURN
BOOL
DESCRIPTION
Returns TRUE, if there is a valid block.
******************************************************************************/
BOOL block_ok (void)
{
/* A block is valid, if it has a type and a valid end-line */
return ((BOOL)(ActualBlock.type != BT_NONE && ActualBlock.end_line >= 0));
} /* block_ok */
void test (void)
{
} /* test */
/*****************************************************************************
NAME
block_to_string
PARAMETER
void
RETURN
char * string;
DESCRIPTION
Creates a string from the currently marked block. The lines
are separated with '\n' and the string is terminated with
'\0'.
NOTES
- The string will only contain '\n's, if the end of a line is
included in the block.
- The block has to be freed with free() if you don't need it anymore,
but this may change.
HISTORY
13. Feb 1993 ada created
******************************************************************************/
void do_copy (void)
{
struct IOClipReq * ior;
char * str = block_to_string ();
if (str)
{
D(bug("block_to_string:\n`%s'\n", str));
if (ior = CBOpen (0))
{
CBWriteFTXT (ior, str);
CBClose (ior);
}
free (str);
}
else
D(bug("block_to_string: (NUL)\n"));
} /* do_copy */
char * block_to_string (void)
{
ED * ep;
Line line;
int length;
int linelen;
char * string,
* ptr,
* text;
if (block_ok ())
{
ep = ActualBlock.ep;
/* to prevent us from write the same code twice (once for
figuring out how long the string will be and once for actually
filling the string), we simply check if "string" is NULL.
If it is, we have to get the length else we copy the contents. */
ptr = string = NULL;
/*
LINE: The length of the block is the sum of the lengths of all
lines + CR + \0.
NORMAL: The length of this block is the sum of the lengths of all
body lines plus the length of the start- and the end-line
plus \0. The length of the start-line is
o 1, if length < start_column
o length-start_column+1, if length > start_column
and the length of the end-line is
o end_column+1, if length > end_column
o length+1, if length < end_column
If the block has only one line, the length is
o end_column-start_column if length > end_col
o length-start_column+1 if length < end_col
VERTICAL: The length of the block is the sum of the lengths of
all lines + CR + \0. The length of a line is
o 0 if the line is < start-column
o length-start_column if the line is < end-column
o start_column-end_column if line is >= end-column
When we have the length, we allocate memory for it and copy
the block into that memory.
*/
length = 1; /* ending '\0' */
text_sync (); /* use latest text */
do {
for (line=ActualBlock.start_line; line <= ActualBlock.end_line;
line ++)
{
text = GETTEXT (ep,line);
linelen = strlen (text);
if (linelen > 256)
{
D(bug("block_to_string: Aborting..."
"len (%ld) in line %ld too large !\n",
linelen, line));
break;
}
if (string && ptr-string > length)
break;
switch (ActualBlock.type)
{
case BT_LINE:
{
if (string)
{
strcpy (ptr, text);
ptr += linelen;
*ptr ++ = '\n'; /* always add LF */
}
else
length += linelen + 1;
}
break;
case BT_NORMAL:
if (line != ActualBlock.start_line)
{
if (line != ActualBlock.end_line)
{
/* body line */
if (string)
{
strcpy (ptr, text);
ptr += linelen;
*ptr ++ = '\n'; /* always add LF */
}
else
length += linelen + 1;
}
else
{
/* end-line */
if (string)
{
strncpy (ptr, text, ActualBlock.end_column);
ptr += ActualBlock.end_column;
}
else
length += ActualBlock.end_column;
if (linelen == ActualBlock.end_column)
{
if (string)
*ptr ++ = '\n';
else
length ++;
}
}
}
else if (line != ActualBlock.end_line)
{
/* start-line */
if (linelen > ActualBlock.start_column)
{
if (string)
{
strcpy (ptr, text + ActualBlock.start_column);
ptr += strlen (ptr);
}
else
length += linelen - ActualBlock.start_column;
}
if (string)
*ptr ++ = '\n';
else
length ++;
}
else /* block has only one line */
{
if (linelen > ActualBlock.end_column)
{
/* copy part of the line */
linelen = ActualBlock.end_column -
ActualBlock.start_column + 1;
if (string)
{
strncpy (ptr, text + ActualBlock.start_column,
linelen);
ptr += linelen;
}
else
length += linelen;
}
else if (linelen > ActualBlock.start_column)
{
/* end of line + CR */
if (string)
{
strcpy (ptr, text + ActualBlock.start_column);
ptr += strlen (ptr);
*ptr ++ = '\n';
}
else
{
linelen -= ActualBlock.start_column;
length += linelen + 1;
}
}
else
{
/* only CR */
if (string)
*ptr ++ = '\n';
else
length ++;
}
}
break;
case BT_VERTICAL:
{
if (linelen <= ActualBlock.start_column)
{
/* only '\n' */
if (string)
*ptr ++ = '\n';
else
length ++;
}
else if (linelen <= ActualBlock.end_column)
{
if (string)
{
strcpy (ptr, text + ActualBlock.start_column);
ptr += strlen (ptr);
*ptr ++ = '\n';
}
else
length += linelen - ActualBlock.start_column + 2;
}
else /* line is longer than block wide */
{
linelen = ActualBlock.end_column -
ActualBlock.start_column + 1;
if (string)
{
strncpy (ptr, text + ActualBlock.start_column,
linelen);
ptr += linelen;
*ptr ++ = '\n';
}
else
length += linelen;
}
}
break;
} /* switch */
}
if (string && ptr-string > length)
{
D(bug("Aborting ... String exceeds "
"(%ld:%ld) )buffer in line %ld !\n",
ptr-string, length, line));
}
if (string)
break; /* done ! */
else
{
string = malloc (length+256); /* allocate memory */
ptr = string; /* points to EOS */
}
/* after the loop, the string must be non-NULL, else we didn't get the
memory ! */
} while (string != NULL);
if (string) /* add '\0' */
{
*ptr = 0;
if (length != strlen (string)+1)
{
D(bug("Fehler: length: %ld strlen: %ld\n",
length, strlen(string)+1));
}
}
}
else
string = NULL;
return (string);
} /* block_to_string */
/*****************************************************************************
NAME
do_bdelete
PARAMETER
void
RETURN
void
DESCRIPTION
Deletes the marked block from the text.
******************************************************************************/
void do_bdelete (void)
{
long lines;
ED * bep = ActualBlock.ep;
ED * saveed = Ep;
/* is there a valid block ? */
if (!block_ok ())
return;
/* TODO */
if (ActualBlock.type != BT_LINE)
{
error ("bdelete:\nCannot use for this\ntype of block.");
return;
}
/* don't allow it in VIEWMODE */
if (bep->viewmode)
{
error ("%s:\nCannot delete from a\nwrite-protected text", av[0]);
return;
} /* if */
/* change editor */
switch_ed (bep);
/* length of block */
lines = ActualBlock.end_line - ActualBlock.start_line + 1;
/* if line is inside the block, move to start of block. If it is
beyond the end-line, move up */
if (bep->line >= ActualBlock.start_line && bep->line <= ActualBlock.end_line)
bep->line = ActualBlock.start_line;
else if (bep->line > ActualBlock.end_line)
bep->line -= lines;
/* same for the 1st line */
if (bep->topline >= ActualBlock.start_line && bep->topline <= ActualBlock.end_line)
bep->topline = ActualBlock.start_line;
else if (bep->topline > ActualBlock.end_line)
bep->topline -= lines;
/* free memory and copy lines from beyond the block back */
freelist (bep->list + ActualBlock.start_line, lines);
bmovl (bep->list + ActualBlock.end_line + 1,
bep->list + ActualBlock.start_line,
bep->lines - ActualBlock.end_line - 1);
/* adjust number of lines. Text has been modified */
bep->lines -= lines;
bep->modified = 1;
/* move cursor if it's now outside the text */
if (bep->line >= bep->lines)
bep->line = bep->lines - 1;
/* move topline if it's now outside the text */
if (bep->topline >= bep->lines)
bep->topline = bep->lines - 1;
/* no lines in text ? */
if (bep->line < 0)
bep->topline = bep->line = 0;
/* create at least one line */
if (bep->lines == 0)
{
bep->lines ++;
SETLINE(bep,0,allocline(1));
}
/* get current line */
text_load ();
/* no block anymore */
ActualBlock.type = BT_NONE;
/* always redisplay */
text_adjust (TRUE);
/* adjust scroller */
prop_adj ();
/* old editor */
switch_ed (saveed);
} /* do_bdelete */
/*****************************************************************************
NAME
do_bcopy
PARAMETER
void
RETURN
void
DESCRIPTION
Copies a block to the line above the cursor. It is possible to
copy the block into itself thus making it bigger.
******************************************************************************/
void do_bcopy (void)
{
LINE * list;
long lines,
i;
ED * ep = Ep;
UBYTE * str;
/* update line */
text_sync ();
/* No valid block ? */
if (!block_ok ())
return;
/* TODO */
if (ActualBlock.type != BT_LINE)
{
error ("bcopy:\nCannot use for this\ntype of block.");
return;
}
/* get length of block */
lines = ActualBlock.end_line - ActualBlock.start_line + 1;
/* make sure we have enough space */
if (extend (ep, lines))
{
/* get memory for lines */
if (list = (LINE *)alloclptr(lines))
{
/* copy lines to buffer */
bmovl (ActualBlock.ep->list+ActualBlock.start_line, list, lines);
/* make room for the lines */
bmovl (ep->list+ep->line, ep->list+ep->line+lines,
ep->lines-ep->line);
/* now copy each separate line */
for (i = 0; i < lines; i ++)
{
/* get memory for one line */
str = allocline (LENGTH ((char *)list[i]) + 1);
/* no more memory ? */
if (!str)
{
/* set error */
nomemory ();
/* free memory */
FreeMem (list, lines * sizeof(LINE));
freelist (ep->list + ep->line, i);
/* make space for block disappear */
bmovl (ep->list+ep->line+lines, ep->list+ep->line,
ep->lines-ep->line);
return;
}
/* copy contents */
strcpy ((char *)str, (char *)list[i]);
/* add line to list */
SETLINE(ep,ep->line+i,str);
}
/* free buffer */
FreeMem (list, lines * sizeof(LINE));
/* if we inserted the block before the start of the block,
we must adjust it */
if (ep == ActualBlock.ep)
{
if (ep->line <= ActualBlock.start_line)
{
ActualBlock.start_line += lines;
ActualBlock.end_line += lines;
} else if (ep->line <= ActualBlock.end_line)
ActualBlock.end_line += lines;
}
/* Text has been modified. Also the number of lines has changed. */
ep->modified = 1;
ep->lines += lines;
#ifdef NOTDEF
/* update display */
if (!text_adjust (FALSE))
{
scroll_display (0, -lines, ep->topcolumn, ep->line,
ep->topcolumn+Columns, ep->topline+Lines);
}
#endif
/* Move cursor to the bottom */
ep->line += lines;
/* get new contents */
text_load ();
if (!text_adjust (FALSE)) /* display is adjusted, if needed */
{
scroll_display (0, -lines, ep->topcolumn, ep->line-lines,
ep->topcolumn+Columns, ep->topline+Lines-1);
}
/* adjust scroller */
prop_adj ();
} else
nomemory ();
} else
nomemory ();
} /* do_bcopy */
/*****************************************************************************
NAME
do_bmove
PARAMETER
void
RETURN
void
DESCRIPTION
Moves the marked block between the current line and the line
above it. It's not possible to move the block into itself.
******************************************************************************/
void do_bmove (void)
{
long lines;
LINE * list;
ED * ep = Ep;
/* update text */
text_sync ();
/* no block ?? */
if (!block_ok ())
return;
/* TODO */
if (ActualBlock.type != BT_LINE)
{
error ("bmove:\nCannot use for this\ntype of block.");
return;
}
/* not allowed in viewmode */
if (ActualBlock.ep->viewmode)
{
error ("%s:\nCannot move from a\nwrite-protected text", av[0]);
return;
} /* if */
/* it is not very usefull to move a block into itself */
if ( ActualBlock.ep == ep &&
ep->line >= ActualBlock.start_line &&
ep->line <= ActualBlock.end_line )
{
error ("bmove:\nCannot move a\nblock into itself");
return;
}
/* length of block */
lines = ActualBlock.end_line - ActualBlock.start_line + 1;
/* get memory for a copy of the block */
if (!(list = (LINE *)alloclptr (lines)))
{
nomemory ();
return;
}
/* text has been modified */
ActualBlock.ep->modified = ep->modified = 1;
/* copy block to tmp. memory */
bmovl (ActualBlock.ep->list + ActualBlock.start_line, list, lines);
/* are we in the editor that has the block or do we have to move the
block to some other editor ? */
if (ep == ActualBlock.ep)
{
/* behind the block: move the lines behind the block upto the current
line up to the line where the block started and copy the former
block into the new space */
if (ep->line > ActualBlock.start_line)
{
bmovl ( ep->list + ActualBlock.end_line + 1,
ep->list + ActualBlock.start_line,
ep->line - ActualBlock.end_line -1);
bmovl (list, ep->list + ep->line - lines, lines);
} else
{ /* before the block: copy all lines from the current upto
the line where the block began up to the block-end
and copy the former block into the new space */
bmovl (ep->list + ep->line, ep->list + ep->line + lines,
ActualBlock.start_line - ep->line);
bmovl (list, ep->list + ep->line, lines);
/* move down */
ep->line += lines;
}
/* load (new) current line */
text_load ();
} else
{ /* move block between editors */
/* make room in the editor that gets the block */
if (extend (ep, lines))
{
/* copy the lines after the block the beginning of the block
thus deleting him */
bmovl ( ActualBlock.ep->list + ActualBlock.end_line + 1,
ActualBlock.ep->list + ActualBlock.start_line,
ActualBlock.ep->lines - ActualBlock.end_line - 1);
/* make room in the list of lines for the block */
bmovl ( ep->list + ep->line,
ep->list + ep->line + lines,
ep->lines - ep->line);
/* copy the buffer to its new place */
bmovl (list, ep->list + ep->line, lines);
/* adjust the number of lines both editors have now */
ep->lines += lines; /* he gets the block */
ActualBlock.ep->lines -= lines; /* he lost it */
/* the current line in the editor that had the block was inside
the block */
if ( ActualBlock.ep->line >= ActualBlock.start_line &&
ActualBlock.ep->line <= ActualBlock.end_line )
{
/* move cursor to the place where the block started */
ActualBlock.ep->line = ActualBlock.start_line;
/* if the block was the last thing in this text, move up
one more line */
if (ActualBlock.ep->line == ActualBlock.ep->lines)
ActualBlock.ep->line --;
}
/* if the line was behind the last line of the block, move up
the length of the block in lines. */
if (ActualBlock.ep->line > ActualBlock.end_line)
ActualBlock.ep->line -= lines;
/* ... but not too far */
if (ActualBlock.ep->line < 0)
ActualBlock.ep->line = 0;
/* no block anymore */
ActualBlock.type = BT_NONE;
/* if we moved the whole text, make sure the old editor
al least contains one single line */
if (ActualBlock.ep->lines == 0)
{
LINE ptr = allocline (1);
SETLINE(ActualBlock.ep,0,ptr);
ActualBlock.ep->lines ++;
}
ep->line += lines; /* Move cursor down */
text_load (); /* text_switch() calls text_sync() ! */
switch_ed (ActualBlock.ep); /* make source to the active editor */
if (!Ep->iconmode)
{ /* Not iconified */
text_adjust (TRUE);
/* adjust scroller */
prop_adj ();
}
switch_ed (ep); /* old Ed */
}
}
ActualBlock.type = BT_NONE; /* We don't have any block anymore */
/* free tmp. buffer */
FreeMem (list, lines * sizeof(LINE));
/* force redisplay */
text_adjust (TRUE);
} /* do_bmove */
/*****************************************************************************
NAME
do_bsource
PARAMETER
void
RETURN
void
DESCRIPTION
Executes all lines inside a block as if they were typed as commands.
The block is removed before the execution starts. The text
is updated before every line. Thus self-modifying code is possible.
NOTE
- since the start and end lines are loaded immediately and the
block unblock'd before execution starts, you can theoretically have
another BSOURCE as part of this BSOURCE (but be carefull!).
- BSOURCE allows self-modifying code
******************************************************************************/
void do_bsource (void)
{
ED * ep;
char buf[MAXLINELEN];
int i, start, end;
if (!block_ok ())
return;
/* TODO */
if (ActualBlock.type != BT_LINE)
{
error ("bsource:\nCannot use for this\ntype of block.");
return;
}
/* find start and end */
ep = ActualBlock.ep;
start = ActualBlock.start_line;
end = ActualBlock.end_line + 1;
/* unblock */
text_redrawblock (0);
/* execute every line */
for (i = start; i < end; i ++)
{
text_sync (); /* make sure we are using the latest text */
if (*(GETTEXT(ep,i)) != '#')
{
strcpy (buf, GETTEXT(ep,i));
if (!do_command (buf))
break;
}
}
} /* do_bsource */
/******************************************************************************
***** ENDE block.c
******************************************************************************/