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% tcl mode 0.1 (derived from shmode.sl, cmode.sl and latex.sl)
% by David Schweikert (dwschwei@stud.ee.ethz.ch)
% This mode only does DFA syntax-highlighting and a very
% rough automatic indentation (assumes that the previous line
% is correctly indented)
% Keybindings
% ----------------------------------------------
% ^C^Q tcl_indent_region
% } tcl_insert_ket
% The syntax-coloring-types of jed aren't very adequate for tcl,
% so, I used them as follows:
%
% - normal: as expected
% - comment: as expected
% - string: as expected
% - number: $variable
% - preprocess: proc definition (first line)
% - keyword: all commands (at beg. of line) - There are no keywords in tcl!
% - operator: not used
$1 = "TCL";
create_syntax_table ($1);
#ifdef HAS_DFA_SYNTAX
enable_highlight_cache ("tclmode.dfa", $1);
define_highlight_rule ("^[ \\t]*#.*$", "comment", $1);
define_highlight_rule (";[ \\t]*#.*$", "comment", $1);
% If you don't like the string highlighting, comment the following line:
define_highlight_rule ("\"([^\\\\\"]|\\\\.)*\"", "string", $1);
define_highlight_rule ("[{}\\[\\]]", "delimiter", $1); % "Qdelimiter"?
define_highlight_rule (".", "normal", $1);
define_highlight_rule ("\\$[a-zA-Z0-9_]+", "number", $1);
define_highlight_rule ("\\${.*}", "Qnumber", $1);
define_highlight_rule ("^[ \\t]*[a-zA-Z0-9_\\.]+", "keyword", $1);
define_highlight_rule ("^[ \\t]*proc[ \\t]+[a-zA-Z0-9_\\.]+[ \\t].*[ \\t]{[ \\t]*$", "preprocess", $1);
% Until jed doesn't has support for context-sensitive highlighting
% (with subpatterns to specify what to highlight in a regexp), the following
% produces rather ugly highlighting: The ';' or '[' before a command
% is also highlighted. If you don't like it, comment it...
define_highlight_rule ("[;\\[][ \\t]*[a-zA-Z0-9_\\.]+", "keyword", $1);
build_highlight_table ($1);
#endif
define tcl_newline_and_indent ()
{
newline ();
tcl_indent_line ();
}
define tcl_indent_to (n)
{
bol_skip_white ();
if (what_column != n)
{
bol_trim ();
n--;
whitespace (n);
}
}
% Doesn't handle escaped or in string braces
define tcl_count_braces ()
{
variable c, count = 0;
push_spot();
bol;
for(bol; not(eolp()); go_right_1()) {
c = what_char ();
if ((c == '{') or (c == '[')) count++;
else if ((c == '}') or (c == ']')) count--;
}
count;
pop_spot();
}
define tcl_go_up ()
{
% Search for a valid previous line.
forever {
if (up_1 ()) {
bol_skip_white ();
if (eolp ()) continue;
if (what_char () != '#') return(1);
}
else return(0);
}
}
define tcl_is_continued_line ()
{
eol();
bskip_white ();
if (blooking_at ("\\")) 1;
else 0;
return;
}
% "} else {" looks ugly!
define tcl_indent_line ()
{
variable upcount = 0;
variable count = 0;
variable contline = 0;
variable col = 0;
variable cursor, oldindent, newindent;
push_spot ();
cursor = what_column ();
bol_skip_white ();
oldindent = what_column ();
% is it a comment? => Leave it
if (what_char () == '#') { pop_spot(); return; }
% Count on the previous line
if(tcl_go_up ()) {
col = what_column ();
upcount += tcl_count_braces ();
% Is the current line a continued line?
if (tcl_is_continued_line ()) contline++;
if (tcl_go_up() and tcl_is_continued_line()) contline--;
}
pop_spot ();
% Count on the current line
count += tcl_count_braces ();
%DEBUG message(strcat(string(upcount), strcat(" : ", string(count))));
if (upcount > 0) col += upcount * C_INDENT;
if (count < 0) col += count * C_INDENT;
col += contline * C_CONTINUED_OFFSET;
tcl_indent_to (col);
newindent = what_column();
goto_column(cursor + newindent - oldindent);
}
define tcl_indent_region ()
{
check_region(1);
pop_mark_1 ();
push_mark();
tcl_indent_line(); % set initial line indentation before narrowing
pop_spot();
push_spot();
go_up_1 ();
narrow();
bob();
while (down_1 ()) % indent line by line (ie slowly)
tcl_indent_line(); % a good latex_format_paragraph would be nice...
widen();
pop_spot();
}
% Could make a tcl_insert_bra which warns about incorrect syntax (brace
% on a new line). This is probably a common syntax error...
define tcl_insert_ket ()
{
insert("}");
if(eolp()) {
tcl_indent_line();
eol();
blink_match ();
}
}
$1 = "TCL";
!if (keymap_p ($1)) make_keymap ($1);
definekey("tcl_insert_ket", "}", $1);
definekey("tcl_indent_region", "^C^Q", $1);
define tcl_mode ()
{
variable mode = "TCL";
set_mode(mode, 4);
use_keymap(mode);
use_syntax_table (mode);
set_buffer_hook ("indent_hook", "tcl_indent_line");
set_buffer_hook ("newline_indent_hook", "tcl_newline_and_indent");
runhooks("tcl_mode_hook");
}
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