/*
* Name: find_left_margin
* Purpose: find left margin depending on word wrap mode
* Date: June 5, 1992
* Passed: ll: node pointer to current line
* wrap_mode: current word wrap mode
* Notes: the algorithm used to figure the indent column was yanked out
* of the insert_newline( ) function and was made into a more
* general algorithm for figuring the left margin irregardless
* of word wrap or indent mode. when in the DYNAMIC_WRAP mode,
* the user don't have to keep changing the left margin when
* special indentation is needed.
*/
int find_left_margin( line_list_ptr ll, int wrap_mode )
{
register int lm;
int len;
text_ptr source;
if (wrap_mode == FIXED_WRAP) {
/*
* for FIXED_WRAP mode, the left and paragraph margins are determined
* from the master mode structure.
*/
if (g_status.copied) {
source = (text_ptr)g_status.line_buff;
len = g_status.line_buff_len;
} else {
if (ll->prev != NULL) {
source = ll->prev->line;
len = ll->prev->len;
} else {
source = NULL;
len = 0;
}
}
if (source == NULL)
lm = mode.parg_margin;
else if (find_end( source, len ) == 0)
lm = mode.parg_margin;
else
lm = mode.left_margin;
} else {
/*
* for Indent and DYNAMIC_WRAP modes, the left margin is determined
* from the first non blank line above the cursor.
*/
if (g_status.copied == TRUE) {
source = (text_ptr)g_status.line_buff;
len = g_status.line_buff_len;
} else {
source = ll->line;
len = ll->len;
}
lm = first_non_blank( source, len );
if (is_line_blank( source, len ) && ll->prev != NULL) {
for (ll=ll->prev; ll != NULL; ll=ll->prev) {
lm = first_non_blank( ll->line, ll->len );
if (!is_line_blank( ll->line, ll->len ))
break;
}
}
}
return( lm );
}
/*
* Name: combine_wrap_spill
* Purpose: combine word wrap lines so we don't push each word onto a
* separate line.
* Date: November 27, 1991
* Passed: window: pointer to current window
* wrap_col: col to combine next line
* lm: left margin
* rm: right margin
* side: left or right margin to insert spaces
* new_line: boolean, should we insert a new line?
*/
void combine_wrap_spill( WINDOW *window, int wrap_col, int lm, int rm,
int side, int new_line )
{
line_list_ptr p; /* line we wrapped */
line_list_ptr pp; /* pointer to next line after wrapped line */
int p_len; /* length of line we just word wrapped */
int non_blank; /* first non-blank column on next line */
int control_t; /* number of times to call word_delete */
int next_line_len; /* length of next line counting from 1st word */
WINDOW w; /* scratch window */
dup_window_info( &w, window );
g_status.command = WordWrap;
w.rcol = wrap_col;
if (new_line) {
insert_newline( &w );
if (mode.right_justify == TRUE)
justify_right_margin( &w, w.ll->prev, mode.word_wrap == FIXED_WRAP ?
find_left_margin( w.ll->prev, mode.word_wrap ) : lm, rm, side );
p = window->ll->next;
} else
p = window->ll;
if (p != NULL) {
p_len = find_end( p->line, p->len );
pp = p->next;
if (pp != NULL) {
non_blank = first_non_blank( pp->line, pp->len );
next_line_len = find_end( pp->line, pp->len ) - non_blank;
if (!is_line_blank( pp->line, pp->len ) && p_len + next_line_len <= rm) {
control_t = 1;
if (mode.inflate_tabs) {
if (*pp->line == ' ' || *pp->line == '\t')
++control_t;
} else if (*pp->line == ' ')
++control_t;
w.ll = p;
w.rcol = p_len + 1;
if (*(p->line+p_len-1) == '.')
++w.rcol;
while (control_t--)
word_delete( &w );
remove_spaces( lm );
un_copy_line( w.ll, &w, TRUE );
}
window->file_info->dirty = GLOBAL;
}
}
}
/*
* Name: skip_eol
* Purpose: move the diff to the next line
* Date: October 31, 1992
* Passed: d: pointer to current node
* r: tab adjusted real col
* rcol: real real col
* rline: current line number
* bin_offset: offset from the beginning of the file
* Returns: next non-blank node
*/
line_list_ptr skip_eol( line_list_ptr d, int *r, int *rcol, long *rline,
long *bin_offset )
{
int leading;
long rl;
long bo;
*r = *rcol = 0;
rl = *rline;
bo = *bin_offset;
if (d->len != EOF) {
bo += d->len;
d = d->next;
++rl;
if (diff.blank_lines) {
while (d->len != EOF && is_line_blank( d->line, d->len )) {
bo += d->len;
d = d->next;
++rl;
}
}
if (d->len != EOF) {
if (diff.leading) {
leading = skip_leading_space( d->line, d->len );
if (mode.inflate_tabs)
leading = detab_adjust_rcol( d->line, leading );
*rcol = leading;
} else
*rcol = 0;
*r = *rcol;
if (mode.inflate_tabs)
*r = entab_adjust_rcol( d->line, d->len, *rcol );
}
}
*rline = rl;
*bin_offset = bo;
return( d );
}
codelist_entry *process_line(){
eat_whitespace();
codelist_entry *ret = NULL;
printf("Processing line: %s -- len: %d\n", input_file_stack->line_buffer, (int)strlen(input_file_stack->line_buffer));
if(!is_line_blank() && !is_line_comment()){
if(is_line_label()){
printf("Line is label\n");
return process_label();
}else if(is_line_dat()){
printf("Line is data\n");
return process_dat();
}else if(is_line_include()){
printf("Line is include\n");
open_input_m4(get_include_filename());
return NULL;
}else{
printf("Processing code line\n");
return process_op();
}
}else{
printf("Line comment/empty/blank\n");
}
return ret;
}
/*
* Name: differ
* Purpose: diff text pointers
* Date: October 31, 1992
* Passed: initial_rcol1: beginning column to begin diff in window1
* initial_rcol2: beginning column to begin diff in window2
* bottom: line to display diagnostics
* Notes: a straight diff on text pointers is simple; however, diffing
* with leading spaces and tabs is kinda messy. let's do the
* messy diff.
*/
int differ( int initial_rcol1, int initial_rcol2, int bottom )
{
int rcol1; /* virtual real column on diff window 1 */
int rcol2; /* virtual real column on diff window 2 */
int r1; /* real real column rcol1 - needed for tabs */
int r2; /* real real column rcol2 - needed for tabs */
char c1; /* character under r1 */
char c2; /* character under r2 */
int leading1; /* adjustment for leading space in window 1 */
int leading2; /* adjustment for leading space in window 2 */
int len1; /* length of diff1 line */
int len2; /* length of diff2 line */
line_list_ptr node1; /* scratch node in window 1 */
line_list_ptr node2; /* scratch node in window 2 */
text_ptr diff1; /* scratch text ptr in window 1 */
text_ptr diff2; /* scratch text ptr in window 2 */
long rline1; /* real line number of diff pointer 1 */
long rline2; /* real line number of diff pointer 2 */
long bin_offset1; /* binary offset of diff pointer 1 */
long bin_offset2; /* binary offset of diff pointer 2 */
int len; /* line length variable */
register int tabs; /* local variable for mode.inflate_tabs, T or F */
char line_buff[(MAX_COLS+1)*2]; /* buffer for char and attribute */
/*
* initialize the text pointers and the initial column. skip any
* initial blank lines.
*/
rline1 = diff.rline1;
rline2 = diff.rline2;
node1 = diff.d1;
node2 = diff.d2;
bin_offset1 = diff.bin_offset1;
bin_offset2 = diff.bin_offset2;
tabs = mode.inflate_tabs;
if (diff.blank_lines) {
while (node1->len != EOF && is_line_blank( node1->line, node1->len )) {
bin_offset1 += node1->len;
node1 = node1->next;
++rline1;
initial_rcol1 = 0;
}
while (node2->len != EOF && is_line_blank( node2->line , node2->len)) {
bin_offset2 += node2->len;
node2 = node2->next;
++rline2;
initial_rcol2 = 0;
}
}
/*
* if everything is everything, initialize the diff variables and diff.
*/
if (node1->len != EOF && node2->len != EOF) {
diff1 = node1->line;
diff2 = node2->line;
rcol1 = initial_rcol1;
rcol2 = initial_rcol2;
len1 = node1->len;
len2 = node2->len;
assert( rcol1 >= 0 );
assert( rcol1 < MAX_LINE_LENGTH );
assert( rcol2 >= 0 );
assert( rcol2 < MAX_LINE_LENGTH );
assert( len1 >= 0 );
assert( len1 < MAX_LINE_LENGTH );
assert( len2 >= 0 );
assert( len2 < MAX_LINE_LENGTH );
/*
* if cursors are past EOL, move them back to EOL.
*/
len = find_end( diff1, len1 );
if (rcol1 > len)
rcol1 = len;
len = find_end( diff2, len2 );
if (rcol2 > len)
rcol2 = len;
/*
* if skip leading space, make sure our cursors start on first non-space.
*/
if (diff.leading) {
leading1 = skip_leading_space( diff1, len1 );
leading2 = skip_leading_space( diff2, len2 );
if (tabs) {
leading1 = detab_adjust_rcol( diff1, leading1 );
leading2 = detab_adjust_rcol( diff2, leading2 );
}
if (rcol1 < leading1)
rcol1 = leading1;
if (rcol2 < leading2)
rcol2 = leading2;
}
/*
* we now have a valid rcol for the diff start, we may need to adjust
* for tabs, though.
*/
assert( rcol1 >= 0 );
assert( rcol1 < MAX_LINE_LENGTH );
assert( rcol2 >= 0 );
assert( rcol2 < MAX_LINE_LENGTH );
r1 = tabs ? entab_adjust_rcol( diff1, len1, rcol1 ) : rcol1;
r2 = tabs ? entab_adjust_rcol( diff2, len2, rcol2 ) : rcol2;
assert( r1 >= 0 );
assert( r1 <= len1 );
assert( r2 >= 0 );
assert( r2 <= len2 );
assert( r1 <= rcol1 );
assert( r2 <= rcol2 );
s_output( diff_message, g_display.mode_line, 67, g_display.diag_color );
while (node1->len != EOF && node2->len != EOF &&
!g_status.control_break) {
/*
* look at each character in each diff window
*/
c1 = (char)(r1 < len1 ? *(diff1 + r1) : 0);
c2 = (char)(r2 < len2 ? *(diff2 + r2) : 0);
/*
* tabs == space
*/
if (tabs) {
if (c1 == '\t')
c1 = ' ';
if (c2 == '\t')
c2 = ' ';
}
/*
* skip spaces, if needed
*/
if (diff.all_space) {
while (c1 == ' ' && r1 < len1) {
++rcol1;
r1 = tabs ? entab_adjust_rcol( diff1, len1, rcol1 ) : rcol1;
c1 = (char)(r1 < len1 ? *(diff1 + r1) : 0);
if (c1 == '\t' && tabs)
c1 = ' ';
}
while (c2 == ' ' && r2 < len2) {
++rcol2;
r2 = tabs ? entab_adjust_rcol( diff2, len2, rcol2 ) : rcol2;
c2 = (char)(r2 < len2 ? *(diff2 + r2) : 0);
if (c2 == '\t' && tabs)
c2 = ' ';
}
}
/*
* if one of the node pointers has come to EOL, move to next
* diff line.
*/
if (diff.ignore_eol) {
if (r1 >= len1) {
node1 = skip_eol( node1, &r1, &rcol1, &rline1, &bin_offset1 );
len1 = node1->len;
if (len1 != EOF) {
diff1 = node1->line;
c1 = (char)(r1 < len1 ? *(diff1 + r1) : 0);
if (c1 == '\t' && tabs)
c1 = ' ';
}
}
if (r2 >= len2) {
node2 = skip_eol( node2, &r2, &rcol2, &rline2, &bin_offset2 );
len2 = node2->len;
if (len2 != EOF) {
diff2 = node2->line;
c2 = (char)(r2 < len2 ? *(diff2 + r2) : 0);
if (c2 == '\t' && tabs)
c2 = ' ';
}
}
}
/*
* convert the characters to lower case, if needed.
*/
if (mode.search_case == IGNORE) {
c1 = (char)tolower( c1 );
c2 = (char)tolower( c2 );
}
/*
* diff each character in the diff lines until we reach EOL
*/
while (r1 < len1 && r2 < len2) {
if (c1 == c2) {
if (diff.all_space) {
do {
++rcol1;
r1 = tabs ? entab_adjust_rcol( diff1,len1,rcol1 ) : rcol1;
c1 = (char)(r1 < len1 ? *(diff1 + r1) : 0);
if (c1 == '\t' && tabs)
c1 = ' ';
} while (c1 == ' ' && r1 < len1);
do {
++rcol2;
r2 = tabs ? entab_adjust_rcol( diff2,len2,rcol2 ) : rcol2;
c2 = (char)(r2 < len2 ? *(diff2 + r2) : 0);
if (c2 == '\t' && tabs)
c2 = ' ';
} while (c2 == ' ' && r2 < len2);
} else {
++rcol1;
++rcol2;
r1 = tabs ? entab_adjust_rcol( diff1, len1, rcol1 ) : rcol1;
r2 = tabs ? entab_adjust_rcol( diff2, len2, rcol2 ) : rcol2;
c1 = (char)(r1 < len1 ? *(diff1 + r1) : 0);
c2 = (char)(r2 < len2 ? *(diff2 + r2) : 0);
if (tabs) {
if (c1 == '\t')
c1 = ' ';
if (c2 == '\t')
c2 = ' ';
}
}
if (diff.ignore_eol) {
if (r1 >= len1) {
node1 = skip_eol(node1, &r1, &rcol1, &rline1,&bin_offset1);
len1 = node1->len;
if (len1 != EOF) {
diff1 = node1->line;
c1 = (char)(r1 < len1 ? *(diff1 + r1) : 0);
if (c1 == '\t' && tabs)
c1 = ' ';
}
}
if (r2 >= len2) {
node2 = skip_eol(node2, &r2, &rcol2, &rline2,&bin_offset2);
len2 = node2->len;
if (len2 != EOF) {
diff2 = node2->line;
c2 = (char)(r2 < len2 ? *(diff2 + r2) : 0);
if (c2 == '\t' && tabs)
c2 = ' ';
}
}
}
if (mode.search_case == IGNORE) {
c1 = (char)tolower( c1 );
c2 = (char)tolower( c2 );
}
} else {
/*
* when we show the diff, use rcol1 and rcol2, as
* find_adjust does not adjust rcol for tabs.
*/
update_line( diff.w1 );
diff.w1->bin_offset = bin_offset1;
find_adjust( diff.w1, node1, rline1, rcol1 );
check_virtual_col( diff.w1, rcol1, rcol1 );
show_diff_window( diff.w1 );
update_line( diff.w2 );
diff.w2->bin_offset = bin_offset2;
bin_offset_adjust( diff.w2, rline2 );
find_adjust( diff.w2, node2, rline2, rcol2 );
check_virtual_col( diff.w2, rcol2, rcol2 );
show_diff_window( diff.w2 );
s_output( diff_blank, g_display.mode_line, 67,
g_display.mode_color );
return( OK );
}
}
/*
* if we haven't come to the end of a file buffer, check the last
* characters. see if pointers are at EOL.
*/
if (node1->len != EOF && node2->len != EOF) {
if (rcol1 != len1 && rcol2 != len2) {
update_line( diff.w1 );
diff.w1->bin_offset = bin_offset1;
find_adjust( diff.w1, node1, rline1, rcol1 );
show_diff_window( diff.w1 );
update_line( diff.w2 );
diff.w2->bin_offset = bin_offset2;
find_adjust( diff.w2, node2, rline2, rcol2 );
show_diff_window( diff.w2 );
s_output( diff_blank, g_display.mode_line, 67,
g_display.mode_color );
return( OK );
} else {
node1 = skip_eol( node1, &r1, &rcol1, &rline1, &bin_offset1 );
len1 = node1->len;
diff1 = node1->line;
node2 = skip_eol( node2, &r2, &rcol2, &rline2, &bin_offset2 );
len2 = node2->len;
diff2 = node2->line;
}
}
assert( rcol1 >= 0 );
assert( rcol1 < MAX_LINE_LENGTH );
assert( rcol2 >= 0 );
assert( rcol2 < MAX_LINE_LENGTH );
assert( r1 >= 0 );
assert( r1 < MAX_LINE_LENGTH );
assert( r2 >= 0 );
assert( r2 < MAX_LINE_LENGTH );
assert( r1 <= rcol1 );
assert( r2 <= rcol2 );
if (node1->len == EOF)
assert( len1 == EOF );
else {
assert( len1 >= 0 );
assert( len1 < MAX_LINE_LENGTH );
}
if (node2->len == EOF)
assert( len2 == EOF );
else {
assert( len2 >= 0 );
assert( len2 < MAX_LINE_LENGTH );
}
}
save_screen_line( 0, bottom, line_buff );
set_prompt( diff_prompt4, bottom );
getkey( );
restore_screen_line( 0, bottom, line_buff );
s_output( diff_blank, g_display.mode_line, 67, g_display.mode_color );
}
return( ERROR );
}
/*
* Name: flush_center
* Purpose: flush line in center of margins
* Date: November 27, 1991
* Passed: window: pointer to current window
*/
int flush_center( WINDOW *window )
{
int len; /* length of current line */
char *source; /* temp line buffer pointers */
char *dest;
int rm;
int lm;
register int spaces; /* center of text on current line */
int center; /* center of current margins */
int first; /* column of first char on line */
int last; /* column of last char on line */
register WINDOW *win; /* put window pointer in a register */
win = window;
copy_line( win->ll );
detab_linebuff( );
source = g_status.line_buff;
len = g_status.line_buff_len;
if (!is_line_blank( (text_ptr)source, len )) {
rm = mode.right_margin;
lm = mode.left_margin;
center = (rm + lm) / 2;
first = first_non_blank( (text_ptr)source, len );
for (last=len-1; last>=0 && *(source+last) == ' ';)
last--;
spaces = last + first - 1;
spaces = (spaces / 2) + (spaces & 1);
if (spaces != center) {
/*
* if spaces is less than center margin then we need to add spaces.
*/
if (spaces < center) {
spaces = center - spaces;
dest = source + spaces;
if (len + spaces > MAX_LINE_LENGTH) {
/*
* line would be too long
*/
error( WARNING, win->bottom_line, ww1 );
return( ERROR );
} else {
load_undo_buffer( win->file_info, win->ll->line, win->ll->len );
assert( len >= 0 );
assert( len < MAX_LINE_LENGTH );
memmove( dest, source, len );
g_status.line_buff_len += spaces;
while (spaces--)
*source++ = ' ';
win->file_info->dirty = GLOBAL;
}
/*
* if spaces is greater than center margin then we need to sub spaces.
*/
} else {
load_undo_buffer( win->file_info, win->ll->line, win->ll->len );
spaces = spaces - center;
if (spaces > first)
spaces = first;
dest = source + spaces;
assert( len - spaces >= 0 );
assert( len - spaces < MAX_LINE_LENGTH );
memmove( source, dest, len - spaces );
g_status.line_buff_len -= spaces;
win->file_info->dirty = GLOBAL;
}
win->ll->dirty = TRUE;
show_changed_line( win );
}
}
return( OK );
}
/*
* Name: flush_right
* Purpose: flush line on right margin
* Date: November 27, 1991
* Passed: window: pointer to current window
*/
int flush_right( WINDOW *window )
{
int len; /* length of current line */
int i;
int spaces;
char *source;
char *dest;
register int rcol;
int rm;
register WINDOW *win; /* put window pointer in a register */
win = window;
copy_line( win->ll );
detab_linebuff( );
source = g_status.line_buff;
len = g_status.line_buff_len;
if (!is_line_blank( (text_ptr)source, len )) {
rm = mode.right_margin;
for (rcol=len-1; rcol>=0 && *(source+rcol) == ' ';)
rcol--;
if (rcol != rm) {
/*
* if rcol is less than right margin then we need to add spaces.
*/
if (rcol < rm) {
spaces = rm - rcol;
dest = source + spaces;
if (len + spaces > MAX_LINE_LENGTH) {
/*
* line would be too long
*/
error( WARNING, win->bottom_line, ww1 );
return( ERROR );
} else {
load_undo_buffer( win->file_info, win->ll->line, win->ll->len );
assert( len >= 0 );
assert( len < MAX_LINE_LENGTH );
memmove( dest, source, len );
g_status.line_buff_len += spaces;
while (spaces--)
*source++ = ' ';
win->file_info->dirty = GLOBAL;
}
/*
* if rcol is greater than right margin then we need to sub spaces.
*/
} else {
load_undo_buffer( win->file_info, win->ll->line, win->ll->len );
rcol = rcol - rm;
i = first_non_blank( (text_ptr)source, len );
if (rcol > i)
rcol = i;
dest = source + rcol;
assert( len - rcol >= 0 );
assert( len - rcol < MAX_LINE_LENGTH );
memmove( source, dest, len - rcol );
g_status.line_buff_len -= (rcol - rm);
win->file_info->dirty = GLOBAL;
}
win->ll->dirty = TRUE;
show_changed_line( win );
}
}
return( OK );
}
/*
* Name: format_paragraph
* Purpose: format paragraph using left, right, and paragraph margins.
* Date: November 27, 1991
* Passed: window: pointer to current window
*/
int format_paragraph( WINDOW *window )
{
register int len; /* length of current line */
int first_line; /* boolean, first line formatted? */
int spaces; /* no. of spaces to add */
line_list_ptr p; /* scratch pointers */
line_list_ptr pp;
char *source; /* scratch line buffer pointers */
char *dest;
int rcol; /* scratch cols and margins */
int lm;
int rm;
int pm;
int margin;
int eop; /* boolean, (e)nd (o)f (p)aragraph? */
int old_ww; /* save state of word wrap flag */
long rline;
WINDOW w; /* scratch window */
if (window->ll->len == EOF)
return( ERROR );
entab_linebuff( );
if (un_copy_line( window->ll, window, TRUE ) == ERROR)
return( ERROR );
if (!is_line_blank( window->ll->line, window->ll->len )) {
old_ww = mode.word_wrap;
if (old_ww == NO_WRAP)
mode.word_wrap = FIXED_WRAP;
dup_window_info( &w, window );
g_status.screen_display = FALSE;
/*
* find the beginning of the paragraph.
*/
p = w.ll->prev;
if (g_status.command == FormatParagraph) {
while (p != NULL && !is_line_blank( p->line, p->len )) {
--w.rline;
w.ll = w.ll->prev;
p = p->prev;
}
pm = mode.parg_margin;
/*
* if format text, don't find the beginning of the paragraph.
* but we need to know if this is the first line in a paragraph.
*/
} else if (g_status.command == FormatText) {
if (p == NULL || is_line_blank( p->line, p->len ))
pm = mode.parg_margin;
else
pm = mode.left_margin;
} else
pm = mode.left_margin;
g_status.command = WordWrap;
p = w.ll;
if (mode.word_wrap == FIXED_WRAP)
lm = mode.left_margin;
else
lm = pm = find_left_margin( p, mode.word_wrap );
rm = mode.right_margin;
eop = FALSE;
/*
* do the paragraph
*/
for (first_line=TRUE; p != NULL && !is_line_blank( p->line, p->len ) &&
eop == FALSE && !g_status.control_break;) {
/*
* find out what margin to use
*/
if (first_line) {
margin = pm;
first_line = FALSE;
} else
margin = lm;
/*
* line up the margin
*/
w.ll->dirty = TRUE;
copy_line( w.ll );
detab_linebuff( );
remove_spaces( 0 );
rcol = find_word( (text_ptr)g_status.line_buff,
g_status.line_buff_len, 0 );
if (rcol != ERROR && rcol != margin) {
/*
* must add spaces to get the indentation right
*/
if (rcol < margin) {
source = g_status.line_buff;
spaces = margin - rcol;
dest = source + spaces;
assert( g_status.line_buff_len >= 0 );
assert( g_status.line_buff_len < MAX_LINE_LENGTH );
memmove( dest, source, g_status.line_buff_len );
g_status.line_buff_len += spaces;
while (spaces--)
*source++ = ' ';
} else {
w.rcol = margin;
word_delete( &w );
entab_linebuff( );
un_copy_line( p, &w, TRUE );
copy_line( w.ll );
detab_linebuff( );
remove_spaces( margin );
}
}
/*
* now make sure rest of line is formatted
*/
source = g_status.line_buff;
len = g_status.line_buff_len;
for (; len < rm+1 && eop == FALSE;) {
pp = p->next;
if (is_line_blank( pp->line, pp->len ))
eop = TRUE;
else {
w.ll = p;
w.rcol = len + 1;
if (*(p->line+len-1) == '.')
++w.rcol;
word_delete( &w );
entab_linebuff( );
un_copy_line( p, &w, TRUE );
copy_line( p );
detab_linebuff( );
remove_spaces( margin );
len = g_status.line_buff_len;
}
}
if (len <= rm+1) {
entab_linebuff( );
un_copy_line( p, &w, TRUE );
p = p->next;
if (is_line_blank( p->line, p->len ))
eop = TRUE;
else {
w.ll = w.ll->next;
w.rline++;
}
} else {
w.rcol = rm;
g_status.key_pressed = *(w.ll->line + rm);
rline = w.rline;
word_wrap( &w );
if (rline == w.rline) {
w.ll = w.ll->next;
++w.rline;
}
}
g_status.copied = FALSE;
p = w.ll;
}
mode.word_wrap = old_ww;
g_status.copied = FALSE;
w.file_info->dirty = GLOBAL;
g_status.screen_display = TRUE;
}
return( OK );
}
/*
* Name: word_wrap
* Purpose: make sure lines don't get longer than right margin
* Date: November 27, 1991
* Passed: window: pointer to current window
* Notes: rcol, lm, rm, pm all start counting at zero.
* len (line length) starts counting at 1.
*
* when we compare margins and line lengths, we either have to
* add one to the margins or subtract one from the len. I add
* one to the margins.
*/
void word_wrap( WINDOW *window )
{
int c; /* character the user just entered. */
register int len; /* length of current line */
int i; /* padding spaces required */
line_list_ptr p; /* line above wrapped line */
int rcol;
int lm;
int rm;
int side;
register WINDOW *win; /* put window pointer in a register */
win = window;
/*
* set up a few local variables.
*/
c = g_status.key_pressed;
rcol = win->rcol;
copy_line( win->ll );
detab_linebuff( );
/*
* always start the right margin justification on the right side
* at the beginning of paragraphs. then, alternate with left margin.
*/
side = 1;
p = win->ll->prev;
while (p != NULL && !is_line_blank( p->line, p->len )) {
++side;
p = p->prev;
}
side = (side & 1) ? RIGHT : LEFT;
/*
* when we wrap, we need know where the left margin is.
* let's look at the line above to see if this is the first line
* in a paragraph.
*/
p = win->ll->prev;
lm = find_left_margin( win->ll, mode.word_wrap );
rm = mode.right_margin;
/*
* there two ways that words are pushed onto next line.
* 1. if the word being typed goes over the right margin
* 2. typing a word in the middle of the line pushes words at end of
* line to next line
*
* if the user enters spaces past the right margin then we don't
* word wrap spaces.
*/
len = g_status.line_buff_len;
if (rcol > rm+1 && c != ' ') {
/*
* if this is the first line in a paragraph then set left margin
* to paragraph margin.
*/
if ((p == NULL || is_line_blank( p->line, p->len )) &&
first_non_blank( (text_ptr)g_status.line_buff,
g_status.line_buff_len ) > rm && mode.word_wrap == FIXED_WRAP)
lm = mode.parg_margin;
/*
* simple word wrap. the cursor goes past the right margin.
* find the beginning of the word and put it on a new line.
*
* Special case - if the word begins at the left margin then
* don't wrap it.
*/
for (i=rcol-1; i > lm && g_status.line_buff[i] != ' '; )
i--;
if (i > lm) {
i++;
win->rcol = i;
g_status.command = WordWrap;
insert_newline( win );
if (mode.right_justify == TRUE)
justify_right_margin( win, win->ll->prev,
mode.word_wrap == FIXED_WRAP ? find_left_margin( win->ll->prev,
mode.word_wrap ) : lm, rm, side );
/*
* find out where to place the cursor on the new line.
*/
win->rcol = lm + rcol - i;
check_virtual_col( win, win->rcol, win->rcol );
/*
* we just wrapped the word at the eol. now, let's see if
* we can combine it with the line below. since just added
* a line, set new_line to false - don't add another line.
*/
len = find_end( win->ll->line, win->ll->len );
if (len < rm+1)
combine_wrap_spill( win, len, lm, rm, side, FALSE );
}
} else if (len > rm+1) {
/*
* this is the second word wrap case. we are pushing words onto
* next line. we need to now what character is in the right margin.
*
* 1) if the character is not a space, then we need to search backwards
* to find the start of the word that is on the right margin.
* 2) if the character is a space, then we need to search forward to
* find the word that is over the right margin.
*/
/*
* don't wrap spaces past right margin
*/
if (c == ' ' && rcol > rm) {
for (i=rcol; i<len && g_status.line_buff[i] == ' ';)
i++;
/*
* if i == len then all that's left on line is blanks - don't wrap.
*/
if (i < len)
combine_wrap_spill( win, i, lm, rm, side, TRUE );
} else if (g_status.line_buff[rm+1] != ' ') {
/*
* search backwards for the word to put on next line.
*/
for (i=rm+1; i > lm && g_status.line_buff[i] != ' '; )
i--;
/*
* if we search all the way back to left margin then test for
* a special case - see the matching else for more info.
*/
if (i > lm) {
i++;
/*
* if i > rcol then cursor stays on same line.
*/
if (i > rcol) {
combine_wrap_spill( win, i, lm, rm, side, TRUE );
/*
* split the line at or behind the cursor. almost the
* same as when the cursor goes over the right margin.
*/
} else if (i <= rcol) {
win->rcol = i;
g_status.command = WordWrap;
insert_newline( win );
if (mode.right_justify == TRUE)
justify_right_margin( win, win->ll->prev,
mode.word_wrap == FIXED_WRAP ?
find_left_margin( win->ll->prev, mode.word_wrap ) : lm,
rm, side );
win->rcol = lm + rcol - i;
check_virtual_col( win, win->rcol, win->rcol );
len = find_end( win->ll->line, win->ll->len );
if (len < rm+1)
combine_wrap_spill( win, len, lm, rm, side, FALSE );
}
}
/*
* if the user changed margins or for some reason there's a long
* text line, let's see if there are any words past the right
* margin. if we get to this else, we know the current word
* begins at least at the left margin.
*
* now search forwards for a break
*/
} else {
/*
* go to the right margin and see if there are any words past
* right margin.
*/
for (i=rm+1; i<len && g_status.line_buff[i] == ' '; )
i++;
/*
* we either found a space or the eol. test for eol.
* if i == len then this is one big word - don't wrap it.
*/
if (i != len)
combine_wrap_spill( win, i, lm, rm, side, TRUE );
}
}
}