Delall: Delete Visible Lines from a Selective Display

Here are 3 more Slickedit macros I've been using regularly for several years. Actually, the first one is more of a test macro than it is useful. The other two are stalwarts.

The 3 macros are:

1. count_hidden_lines(): show count of hidden lines
2. dat(): delete all visible lines in the selective display, without deleting any hidden lines
3. delall(): delete all lines containing the specified search string

Have fun. Let me know if you find any significant problems or have comments.

dh

// count_hidden_lines

_command count_hidden_lines()
{
   NoflinesShown0=((p_Noflines)-p_Nofhidden);
   message( NoflinesShown0' visible (selected) lines, p_Noflines= 'p_Noflines'; p_Nofhidden = 'p_Nofhidden);
}


// dat(): delete all visible lines in selective display
// Example: to remove all lines containing "Bookmark this site",
// execute 'all /bookmark this site/' and then execute 'dat.'
// The 'dat' command will delete all of the visible lines and leave the
// rest untouched.

_command dat() name_info(','VSARG2_REQUIRES_EDITORCTL)
{
// get line counts for verification and be sure a selective display is active
   NoflinesShown0=((p_Noflines)-p_Nofhidden);
   if (NoflinesShown0==p_Noflines) {
      _message_box("Error: be sure selective display is active before running ''dat''");
      return(0);
   }
   old_line_cou=p_Noflines;
// make sure nothing is marked--we don't want to delete invisible lines
   if (select_active()) {
      _message_box('Error: Deselect the marked block');
      return(0);
   } else {
      bottom();
      while (p_line>=1) {
         hid=_lineflags() & (HIDDEN_LF);
         if (hid!=HIDDEN_LF) { 
// probably also need to exclude or prompt for
// deletion of pbm "minus" lines. A pbm minus
// line is a hidden line that has been expanded
            status=_delete_line();
         } else {
            cursor_up();
         }
      }
   }
   NoflinesShown1=((p_Noflines)-p_Nofhidden);
   message(old_line_cou'-'old_line_cou-p_Noflines' lines deleted; 'p_Noflines' remain');
   if (p_Noflines!=(old_line_cou-NoflinesShown0)) {
      _message_box('Error: Number of lines deleted does not match original number of visible lines');
   }
   show_all();
}


// delall(): Delete all lines containing the specified search string.
// Locates lines containing matches and then runs 'dat' to delete
// all matching lines in one step.
// Example: "delall /^Subtotal$/r"
// Delall is a timesaver ... and easily reversible, thanks to Undo.
// You can use any arguments to 'delall' that you can use with the
// ordinary 'search', 'find', 'all', 'more', or 'less' commands,
// including those luscious regular expressions we love so much.

_command d,delall(...) name_info(','VSARG2_REQUIRES_EDITORCTLVSARG2_READ_ONLY)
{
   _str searchstr=arg(1);
   _str delim;
   _str sstring;
   _str opts;
   // strip delimiters
   parse searchstr with delim +1 sstring(delim)opts
   save_pos(p);
   all(sstring,'i':+opts);
   dat();
   show_all();
   restore_pos(p);
} 

Show Longest Line and Lines > or < Specified Column Number

I guess you could say I write alot of "utility" macros. Short and sweet, but they get the job done. Here are three that come in handy once in a rare while.

// Find longest line in buffer; display line number and length
// It would be good if the macro took you to the longest line.
// I tried a couple of things that didn't work.
// Maybe you can provide the missing code.
_command longest_line() name_info(','READ_ONLY_ARG2)
{
   save_pos(p);
   top();up();max=0;
   while (!down()) {
      get_line(line);
      len=length(line);
      if (len > max) {
         max=len;
         max_linenum=p_line;
      }
   }
   message('Longest line is ' max_linenum ' with ' max ' bytes');
   restore_pos(p);
}

// The following two macros could be modified to display 'greater
// than or equal to" or "less than or equal to" the specified
// column number, if that is more to your liking.

// Show only lines exceeding the column number you specify.
// This command currently provides a selective display, but doesn't 
// show the usual "+" and "-" marks that you expect in a
// selective display, to enable you to expand and compress the lines.
// Usage: show_lines_over 128. This will display only lines longer than 128 columns
_command show_lines_over(...) name_info(','VSARG2_REQUIRES_EDITORCTLVSARG2_READ_ONLY)
{
   typeless maxlength=arg(1);
   if (arg(1)==''  arg(1)<=0) {
      message('Error: a column number argument is required');
      stop;
   }
   top();up();
   for (;;) {
      status=down();
      get_line(line);
      if (length(line)<=maxlength) {
         _lineflags(HIDDEN_LF,HIDDEN_LF);
      }
      if (status) {
         break;
      }
   }
}

// show lines shorter than specified column length; hide lines longer than that length
_command show_lines_under(...) name_info(','VSARG2_REQUIRES_EDITORCTLVSARG2_READ_ONLY)
{
   typeless minlength=arg(1);
   if (arg(1)==''  arg(1)<=0) {
      message('Error: a column number argument is required');
      stop;
   }
   top();up();
   for (;;) {
      status=down();
      get_line(line);
      if (length(line)>minlength) {
         _lineflags(HIDDEN_LF,HIDDEN_LF);
      }
      if (status) {
         break;
      }
   }
}

dh