public JSBeautify(string js_source_text, JSBeautifyOptions options)
{
opt_indent_size = options.indent_size ?? 4;
opt_indent_char = options.indent_char ?? ' ';
opt_indent_level = options.indent_level ?? 0;
opt_preserve_newlines = options.preserve_newlines ?? true;
output = new StringBuilder();
modes = new Stack<string>();
indent_string = "";
while (opt_indent_size > 0) {
indent_string += opt_indent_char;
opt_indent_size -= 1;
}
indent_level = opt_indent_level;
input = js_source_text.Replace("<script type=\"text/javascript\">","").Replace("</script>","");
if (input.Length != js_source_text.Length)
{
output.AppendLine("<script type=\"text/javascript\">");
add_script_tags = true;
}
last_word = ""; // last 'TK_WORD' passed
last_type = "TK_START_EXPR"; // last token type
last_text = ""; // last token text
do_block_just_closed = false;
var_line = false; // currently drawing var .... ;
var_line_tainted = false; // false: var a = 5; true: var a = 5, b = 6
whitespace = "\n\r\t ";
wordchar = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$";
digits = "0123456789";
// <!-- is a special case (ok, it's a minor hack actually)
punct = "+ - * / % & ++ -- = += -= *= /= %= == === != !== > < >= <= >> << >>> >>>= >>= <<= && &= | || ! !! , : ? ^ ^= |= ::".Split(' ');
// words which should always start on new line.
line_starters = "continue,try,throw,return,var,if,switch,case,default,for,while,break,function".Split(',');
// states showing if we are currently in expression (i.e. "if" case) - 'EXPRESSION', or in usual block (like, procedure), 'BLOCK'.
// some formatting depends on that.
current_mode = "BLOCK";
modes.Push(current_mode);
parser_pos = 0;
in_case = false;
while (true) {
var t = get_next_token(ref parser_pos);
token_text = t[0];
token_type = t[1];
if (token_type == "TK_EOF") {
break;
}
switch (token_type) {
case "TK_START_EXPR":
var_line = false;
set_mode("EXPRESSION");
if ((last_text == ";") || (last_type == "TK_START_BLOCK")) {
print_newline(null);
} else if ((last_type == "TK_END_EXPR") ||( last_type == "TK_START_EXPR")) {
// do nothing on (( and )( and ][ and ]( ..
} else if ((last_type != "TK_WORD") && (last_type != "TK_OPERATOR")) {
print_space();
} else if (line_starters.Contains(last_word)) {
print_space();
}
print_token();
break;
case "TK_END_EXPR":
print_token();
restore_mode();
break;
case "TK_START_BLOCK":
if (last_word == "do") {
set_mode("DO_BLOCK");
} else {
set_mode("BLOCK");
}
if ((last_type != "TK_OPERATOR") && (last_type != "TK_START_EXPR")) {
if (last_type == "TK_START_BLOCK") {
print_newline(null);
} else {
print_space();
}
}
print_token();
indent();
break;
case "TK_END_BLOCK":
if (last_type == "TK_START_BLOCK") {
// nothing
trim_output();
unindent();
} else {
unindent();
print_newline(null);
}
print_token();
restore_mode();
break;
case "TK_WORD":
if (do_block_just_closed) {
// do {} ## while ()
print_space();
print_token();
print_space();
do_block_just_closed = false;
break;
}
if ((token_text == "case" )|| (token_text == "default")) {
if (last_text == ":") {
// switch cases following one another
remove_indent();
} else {
// case statement starts in the same line where switch
unindent();
print_newline(null);
indent();
}
print_token();
in_case = true;
break;
}
prefix = "NONE";
if (last_type == "TK_END_BLOCK") {
if (!(new string[] {"else", "catch", "finally" }).Contains(token_text.ToLower())) {
prefix = "NEWLINE";
} else {
prefix = "SPACE";
print_space();
}
} else if ((last_type == "TK_SEMICOLON") && ((current_mode == "BLOCK") ||( current_mode == "DO_BLOCK"))) {
prefix = "NEWLINE";
} else if ((last_type == "TK_SEMICOLON") && (current_mode == "EXPRESSION")) {
prefix = "SPACE";
} else if (last_type == "TK_STRING") {
prefix = "NEWLINE";
} else if (last_type == "TK_WORD") {
prefix = "SPACE";
} else if (last_type == "TK_START_BLOCK") {
prefix = "NEWLINE";
} else if (last_type == "TK_END_EXPR") {
print_space();
prefix = "NEWLINE";
}
if ((last_type != "TK_END_BLOCK") && ((new string[] {"else", "catch", "finally"}).Contains(token_text.ToLower()))) {
print_newline(null);
} else if ((line_starters.Contains(token_text)) ||( prefix == "NEWLINE")) {
if (last_text == "else") {
// no need to force newline on else break
print_space();
} else if (((last_type == "TK_START_EXPR") ||( last_text == "=") || (last_text == ",")) && (token_text == "function")) {
// no need to force newline on "function": (function
// DONOTHING
} else if ((last_type == "TK_WORD") && ((last_text == "return") || (last_text == "throw"))) {
// no newline between "return nnn"
print_space();
} else if (last_type != "TK_END_EXPR") {
if (((last_type != "TK_START_EXPR") || (token_text != "var")) && (last_text != ":")) {
// no need to force newline on "var": for (var x = 0...)
if ((token_text == "if") && (last_type == "TK_WORD") && (last_word == "else")) {
// no newline for } else if {
print_space();
} else {
print_newline(null);
}
}
} else {
if ((line_starters.Contains(token_text)) && (last_text != ")")) {
print_newline(null);
}
}
} else if (prefix == "SPACE") {
print_space();
}
print_token();
last_word = token_text;
if (token_text == "var") {
var_line = true;
var_line_tainted = false;
}
if (token_text == "if" || token_text == "else") {
if_line_flag = true;
}
break;
case "TK_SEMICOLON":
print_token();
var_line = false;
break;
case "TK_STRING":
if ((last_type == "TK_START_BLOCK" )||( last_type == "TK_END_BLOCK") || (last_type == "TK_SEMICOLON")) {
print_newline(null);
} else if (last_type == "TK_WORD") {
print_space();
}
print_token();
break;
case "TK_OPERATOR":
var start_delim = true;
var end_delim = true;
if (var_line && (token_text != ",")) {
var_line_tainted = true;
if (token_text == ":") {
var_line = false;
}
}
if (var_line && (token_text == ",") && (current_mode == "EXPRESSION")) {
// do not break on comma, for(var a = 1, b = 2)
var_line_tainted = false;
}
if (token_text == ":" && in_case) {
print_token(); // colon really asks for separate treatment
print_newline(null);
in_case = false;
break;
}
if (token_text == "::") {
// no spaces around exotic namespacing syntax operator
print_token();
break;
}
if (token_text == ",") {
if (var_line) {
if (var_line_tainted) {
print_token();
print_newline(null);
var_line_tainted = false;
} else {
print_token();
print_space();
}
} else if (last_type == "TK_END_BLOCK") {
print_token();
print_newline(null);
} else {
if (current_mode == "BLOCK") {
print_token();
print_newline(null);
} else {
// EXPR od DO_BLOCK
print_token();
print_space();
}
}
break;
} else if ((token_text == "--" )|| (token_text == "++")) { // unary operators special case
if (last_text == ";") {
if (current_mode == "BLOCK") {
// { foo; --i }
print_newline(null);
start_delim = true;
end_delim = false;
} else {
// space for (;; ++i)
start_delim = true;
end_delim = false;
}
} else {
if (last_text == "{") {
// {--i
print_newline(null);
}
start_delim = false;
end_delim = false;
}
} else if (((token_text == "!") ||( token_text == "+") || (token_text == "-")) && ((last_text == "return" )|| (last_text == "case"))) {
start_delim = true;
end_delim = false;
} else if (((token_text == "!" )||( token_text == "+") || (token_text == "-")) && (last_type == "TK_START_EXPR")) {
// special case handling: if (!a)
start_delim = false;
end_delim = false;
} else if (last_type == "TK_OPERATOR") {
start_delim = false;
end_delim = false;
} else if (last_type == "TK_END_EXPR") {
start_delim = true;
end_delim = true;
} else if (token_text == ".") {
// decimal digits or object.property
start_delim = false;
end_delim = false;
} else if (token_text == ":") {
if (is_ternary_op()) {
start_delim = true;
} else {
start_delim = false;
}
}
if (start_delim) {
print_space();
}
print_token();
if (end_delim) {
print_space();
}
break;
case "TK_BLOCK_COMMENT":
print_newline(null);
print_token();
print_newline(null);
break;
case "TK_COMMENT":
// print_newline();
print_space();
print_token();
print_newline(null);
break;
case "TK_UNKNOWN":
print_token();
break;
}
last_type = token_type;
last_text = token_text;
}
}
public JSBeautify(string js_source_text, JSBeautifyOptions options)
{
opt_indent_size = options.indent_size ?? 4;
opt_indent_char = options.indent_char ?? ' ';
opt_indent_level = options.indent_level ?? 0;
opt_preserve_newlines = options.preserve_newlines ?? true;
output = new StringBuilder();
modes = new Stack <string>();
indent_string = "";
while (opt_indent_size > 0)
{
indent_string += opt_indent_char;
opt_indent_size -= 1;
}
indent_level = opt_indent_level;
input = js_source_text.Replace("<script type=\"text/javascript\">", "").Replace("</script>", "");
if (input.Length != js_source_text.Length)
{
output.AppendLine("<script type=\"text/javascript\">");
add_script_tags = true;
}
last_word = ""; // last 'TK_WORD' passed
last_type = "TK_START_EXPR"; // last token type
last_text = ""; // last token text
do_block_just_closed = false;
var_line = false; // currently drawing var .... ;
var_line_tainted = false; // false: var a = 5; true: var a = 5, b = 6
whitespace = "\n\r\t ";
wordchar = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_$";
digits = "0123456789";
// <!-- is a special case (ok, it's a minor hack actually)
punct = "+ - * / % & ++ -- = += -= *= /= %= == === != !== > < >= <= >> << >>> >>>= >>= <<= && &= | || ! !! , : ? ^ ^= |= ::".Split(' ');
// words which should always start on new line.
line_starters = "continue,try,throw,return,var,if,switch,case,default,for,while,break,function".Split(',');
// states showing if we are currently in expression (i.e. "if" case) - 'EXPRESSION', or in usual block (like, procedure), 'BLOCK'.
// some formatting depends on that.
current_mode = "BLOCK";
modes.Push(current_mode);
parser_pos = 0;
in_case = false;
while (true)
{
var t = get_next_token(ref parser_pos);
token_text = t[0];
token_type = t[1];
if (token_type == "TK_EOF")
{
break;
}
switch (token_type)
{
case "TK_START_EXPR":
var_line = false;
set_mode("EXPRESSION");
if ((last_text == ";") || (last_type == "TK_START_BLOCK"))
{
print_newline(null);
}
else if ((last_type == "TK_END_EXPR") || (last_type == "TK_START_EXPR"))
{
// do nothing on (( and )( and ][ and ]( ..
}
else if ((last_type != "TK_WORD") && (last_type != "TK_OPERATOR"))
{
print_space();
}
else if (line_starters.Contains(last_word))
{
print_space();
}
print_token();
break;
case "TK_END_EXPR":
print_token();
restore_mode();
break;
case "TK_START_BLOCK":
if (last_word == "do")
{
set_mode("DO_BLOCK");
}
else
{
set_mode("BLOCK");
}
if ((last_type != "TK_OPERATOR") && (last_type != "TK_START_EXPR"))
{
if (last_type == "TK_START_BLOCK")
{
print_newline(null);
}
else
{
print_space();
}
}
print_token();
indent();
break;
case "TK_END_BLOCK":
if (last_type == "TK_START_BLOCK")
{
// nothing
trim_output();
unindent();
}
else
{
unindent();
print_newline(null);
}
print_token();
restore_mode();
break;
case "TK_WORD":
if (do_block_just_closed)
{
// do {} ## while ()
print_space();
print_token();
print_space();
do_block_just_closed = false;
break;
}
if ((token_text == "case") || (token_text == "default"))
{
if (last_text == ":")
{
// switch cases following one another
remove_indent();
}
else
{
// case statement starts in the same line where switch
unindent();
print_newline(null);
indent();
}
print_token();
in_case = true;
break;
}
prefix = "NONE";
if (last_type == "TK_END_BLOCK")
{
if (!(new string[] { "else", "catch", "finally" }).Contains(token_text.ToLower()))
{
prefix = "NEWLINE";
}
else
{
prefix = "SPACE";
print_space();
}
}
else if ((last_type == "TK_SEMICOLON") && ((current_mode == "BLOCK") || (current_mode == "DO_BLOCK")))
{
prefix = "NEWLINE";
}
else if ((last_type == "TK_SEMICOLON") && (current_mode == "EXPRESSION"))
{
prefix = "SPACE";
}
else if (last_type == "TK_STRING")
{
prefix = "NEWLINE";
}
else if (last_type == "TK_WORD")
{
prefix = "SPACE";
}
else if (last_type == "TK_START_BLOCK")
{
prefix = "NEWLINE";
}
else if (last_type == "TK_END_EXPR")
{
print_space();
prefix = "NEWLINE";
}
if ((last_type != "TK_END_BLOCK") && ((new string[] { "else", "catch", "finally" }).Contains(token_text.ToLower())))
{
print_newline(null);
}
else if ((line_starters.Contains(token_text)) || (prefix == "NEWLINE"))
{
if (last_text == "else")
{
// no need to force newline on else break
print_space();
}
else if (((last_type == "TK_START_EXPR") || (last_text == "=") || (last_text == ",")) && (token_text == "function"))
{
// no need to force newline on "function": (function
// DONOTHING
}
else if ((last_type == "TK_WORD") && ((last_text == "return") || (last_text == "throw")))
{
// no newline between "return nnn"
print_space();
}
else if (last_type != "TK_END_EXPR")
{
if (((last_type != "TK_START_EXPR") || (token_text != "var")) && (last_text != ":"))
{
// no need to force newline on "var": for (var x = 0...)
if ((token_text == "if") && (last_type == "TK_WORD") && (last_word == "else"))
{
// no newline for } else if {
print_space();
}
else
{
print_newline(null);
}
}
}
else
{
if ((line_starters.Contains(token_text)) && (last_text != ")"))
{
print_newline(null);
}
}
}
else if (prefix == "SPACE")
{
print_space();
}
print_token();
last_word = token_text;
if (token_text == "var")
{
var_line = true;
var_line_tainted = false;
}
if (token_text == "if" || token_text == "else")
{
if_line_flag = true;
}
break;
case "TK_SEMICOLON":
print_token();
var_line = false;
break;
case "TK_STRING":
if ((last_type == "TK_START_BLOCK") || (last_type == "TK_END_BLOCK") || (last_type == "TK_SEMICOLON"))
{
print_newline(null);
}
else if (last_type == "TK_WORD")
{
print_space();
}
print_token();
break;
case "TK_OPERATOR":
var start_delim = true;
var end_delim = true;
if (var_line && (token_text != ","))
{
var_line_tainted = true;
if (token_text == ":")
{
var_line = false;
}
}
if (var_line && (token_text == ",") && (current_mode == "EXPRESSION"))
{
// do not break on comma, for(var a = 1, b = 2)
var_line_tainted = false;
}
if (token_text == ":" && in_case)
{
print_token(); // colon really asks for separate treatment
print_newline(null);
in_case = false;
break;
}
if (token_text == "::")
{
// no spaces around exotic namespacing syntax operator
print_token();
break;
}
if (token_text == ",")
{
if (var_line)
{
if (var_line_tainted)
{
print_token();
print_newline(null);
var_line_tainted = false;
}
else
{
print_token();
print_space();
}
}
else if (last_type == "TK_END_BLOCK")
{
print_token();
print_newline(null);
}
else
{
if (current_mode == "BLOCK")
{
print_token();
print_newline(null);
}
else
{
// EXPR od DO_BLOCK
print_token();
print_space();
}
}
break;
}
else if ((token_text == "--") || (token_text == "++"))
{ // unary operators special case
if (last_text == ";")
{
if (current_mode == "BLOCK")
{
// { foo; --i }
print_newline(null);
start_delim = true;
end_delim = false;
}
else
{
// space for (;; ++i)
start_delim = true;
end_delim = false;
}
}
else
{
if (last_text == "{")
{
// {--i
print_newline(null);
}
start_delim = false;
end_delim = false;
}
}
else if (((token_text == "!") || (token_text == "+") || (token_text == "-")) && ((last_text == "return") || (last_text == "case")))
{
start_delim = true;
end_delim = false;
}
else if (((token_text == "!") || (token_text == "+") || (token_text == "-")) && (last_type == "TK_START_EXPR"))
{
// special case handling: if (!a)
start_delim = false;
end_delim = false;
}
else if (last_type == "TK_OPERATOR")
{
start_delim = false;
end_delim = false;
}
else if (last_type == "TK_END_EXPR")
{
start_delim = true;
end_delim = true;
}
else if (token_text == ".")
{
// decimal digits or object.property
start_delim = false;
end_delim = false;
}
else if (token_text == ":")
{
if (is_ternary_op())
{
start_delim = true;
}
else
{
start_delim = false;
}
}
if (start_delim)
{
print_space();
}
print_token();
if (end_delim)
{
print_space();
}
break;
case "TK_BLOCK_COMMENT":
print_newline(null);
print_token();
print_newline(null);
break;
case "TK_COMMENT":
// print_newline();
print_space();
print_token();
print_newline(null);
break;
case "TK_UNKNOWN":
print_token();
break;
}
last_type = token_type;
last_text = token_text;
}
}
