1 // <script type="text/javascript">
4 * pack a javascript file, and return a shorter version!
6 * a bit picky at present with ; and crlf reading...
7 * @arg ts {TokenStream}
11 const CompressWhite = function (ts, packer, keepWhite)
13 keepWhite = keepWhite || false;
15 //var str = File.read(fn);
25 if (tok.type == "WHIT") {
31 // just spaces, not \n!
32 //if (tok.data.indexOf("\n") < 0) {
38 if (tok.data == "}") {
40 if (ts.lookTok(1).type == 'NAME' && ts.look(1,true).name == "NEWLINE") {
42 ts.look(0).outData = ts.look(0).data+"\n";
48 // add semi-colon's where linebreaks are used... - not foolproof yet.!
49 if (tok.type == "NAME") {
50 //var tokident = ts.look(-1).data + tok.data + ts.look(1).data + ts.look(2).data;
51 // a = new function() {}
52 if (ts.lookTok(1).data == '=' && ts.lookTok(2).name == 'NEW' &&
53 ts.lookTok(3).name == 'FUNCTION') {
61 // if next is not ';' -> make it so...
63 if (ts.lookTok(1).data != ';' && ts.lookTok(1).data != '}' && ts.lookTok(1,true).name == "NEWLINE") {
64 ts.look(0).outData = ts.cur().data +";";
70 // a = function() { ...
72 if (ts.lookTok(1).data == '=' && ts.lookTok(2).name == "FUNCTION") {
74 //println("got = function() ");
77 if (!ts.balance("(") ){
79 print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
82 throw "could not find end lbrace!!!";
84 //print("AFTER BALANCE (");
85 //ts.dump(cu, ts.cursor);
86 //ts.cursor--; // cursor at the (
87 if (!ts.balance("{") ){
89 print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
92 throw "could not find end lbrace!!!";
94 //print('FN: '+ts.tokens[cu].toString());
95 //print('F1: '+ts.lookTok(1).toString());
96 //print('F2: '+ts.look(1,true).toString());
98 // if next is not ';' -> make it so...
99 // although this var a=function(){},v,c; causes
100 if (ts.lookTok(1).data != ';' && ts.lookTok(1).data != '}' && ts.look(1,true).name == "NEWLINE") {
102 ts.look(0).outData = ts.look(0).data+";";
103 // print("ADDING SEMI: " + ts.look(0).toString());
104 //ts.dump(cu, ts.cursor+2);
107 //ts.dump(cu, ts.cursor+2);
112 // next item is a name..
113 if ((ts.lookTok(1).type == 'NAME' || ts.lookTok(1).type == 'KEYW' ) && ts.look(1,true).name == "NEWLINE") {
114 // preserve linebraek
115 ts.look(0).outData = ts.look(0).data+"\n";
117 // method call followed by name..
118 if (ts.lookTok(1).data == "(") {
122 // although this var a=function(){},v,c; causes
124 if (ts.lookTok(1).type == 'NAME' && ts.look(1,true).name == "NEWLINE") {
126 ts.look(0).outData = ts.look(0).data+"\n";
134 // function a () { ... };
136 if (ts.look(-1).isTypeN(Script.TOKfunction) && ts.look(1).isTypeN(Script.TOKlparen)) {
138 //println("got = function() ");
141 ts.balance("lparen");
142 ts.balance("lbrace");
143 // if next is not ';' -> make it so...
144 // although this var a=function(){},v,c; causes
145 if (!ts.look(1).isData(';') && !ts.look(1).isData('}') && ts.look(1,true).isLineBreak()) {
146 ts.cur().outData = ts.cur().data+";";
156 if (ts.lookTok(1).data == '=' && ts.lookTok(2).data == '{') {
158 //println("----------*** 3 *** --------------");
161 if (!ts.balance("{") ){
163 print(">>>>>>>>>>>>>>>>>HERE>>>>>>>>>>>>");
166 throw "could not find end lbrace!!!";
168 // if next is not ';' -> make it so...
170 if (ts.lookTok(1).data != ';' && ts.lookTok(1).data != '}' && ts.look(1,true).name=="NEWLINE") {
171 ts.look(0).outData = ts.look(0).data +";";
179 // a = function(....) { }
186 //println("got Token: " + tok.type);
190 switch(tok.data.toUpperCase()) {
191 // things that need space appending
195 // if next item is a identifier..
196 if (ts.lookTok(1).type == "NAME" || ts.lookTok(1).data.match(/^[a-z]+$/i) ) { // as include is a keyword for us!!
197 tok.outData = tok.data + " ";
202 case "RETURN": // if next item is not a semi; (or }
203 if (ts.lookTok(1).data == ';' || ts.lookTok(1).data == '}') {
206 tok.outData = tok.data + " ";
211 case "ELSE": // if next item is not a semi; (or }
212 if (!ts.lookTok(1).name == "IF") {
216 tok.outData = tok.data + " ";
219 case "++": // if previous was a plus or next is a + add a space..
220 case "--": // if previous was a - or next is a - add a space..
222 var p = (tok.data == "--" ? '-' : '+');
224 if (ts.lookTok(1).data == p) {
225 tok.outData = tok.data + " ";
227 if (ts.lookTok(-1).data == p) {
228 tok.outData = " " + tok.data;
233 case "IN": // before and after??
236 tok.outData = " " + tok.data + " ";
239 case "VAR": // always after..
246 tok.outData = tok.data + " ";
250 case "TYPEOF": // what about typeof(
251 if (ts.lookTok(1).data != '(') {
252 tok.outData = tok.data + " ";
256 //remove semicolon before brace --
257 //if(ts.look(1).isTypeN(Script.TOKrbrace)) {
269 // NOW OUTPUT THE THING.
270 //var f = new File(minfile, File.NEW);
274 try { out.length = ts.slen; } catch (e) {} // prealloc.
280 tok = keepWhite ? ts.next() : ts.nextTok();
285 if (tok.type == "COMM") {
289 ///print(tok.type + ':' + tok.data);
291 if (tok.type == "NAME" && tok.identifier
292 && tok.identifier.mungedValue && tok.identifier.mungedValue.length) {
293 //f.write(tok.identifier.mungedValue);
294 //print("MUNGED: " + tok.identifier.mungedValue);
295 out += tok.identifier.mungedValue;
299 // at this point we can apply a text translation kit...
301 if ((tok.type == 'STRN') && (tok.name== 'DOUBLE_QUOTE')) {
302 if (packer && packer.stringHandler) {
303 out += packer.stringHandler(tok);
308 out += tok.outData !== false ? tok.outData : tok.data;
310 if ((tok.outData == ';') && (out.length - outoff > 255)) {
317 // remove the last ';' !!!
318 if (out.substring(out.length-1) == ';') {
319 return out.substring(0,out.length-1);