--- /dev/null
+/* jsmin.js - 2006-08-31
+Author: Franck Marcia
+This work is an adaptation of jsminc.c published by Douglas Crockford.
+Permission is hereby granted to use the Javascript version under the same
+conditions as the jsmin.c on which it is based.
+
+jsmin.c
+2006-05-04
+
+Copyright (c) 2002 Douglas Crockford (www.crockford.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+The Software shall be used for Good, not Evil.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+Update:
+ add level:
+ 1: minimal, keep linefeeds if single
+ 2: normal, the standard algorithm
+ 3: agressive, remove any linefeed and doesn't take care of potential
+ missing semicolons (can be regressive)
+ store stats
+ jsmin.oldSize
+ jsmin.newSize
+*/
+
+String.prototype.has = function(c) {
+ return this.indexOf(c) > -1;
+};
+
+function jsmin(comment, input, level) {
+
+ if (input === undefined) {
+ input = comment;
+ comment = '';
+ level = 2;
+ } else if (level === undefined || level < 1 || level > 3) {
+ level = 2;
+ }
+
+ if (comment.length > 0) {
+ comment += '\n';
+ }
+
+ var a = '',
+ b = '',
+ EOF = -1,
+ LETTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz',
+ DIGITS = '0123456789',
+ ALNUM = LETTERS + DIGITS + '_$\\',
+ theLookahead = EOF;
+
+
+ /* isAlphanum -- return true if the character is a letter, digit, underscore,
+ dollar sign, or non-ASCII character.
+ */
+
+ function isAlphanum(c) {
+ return c != EOF && (ALNUM.has(c) || c.charCodeAt(0) > 126);
+ }
+
+
+ /* get -- return the next character. Watch out for lookahead. If the
+ character is a control character, translate it to a space or
+ linefeed.
+ */
+
+ function get() {
+
+ var c = theLookahead;
+ if (get.i == get.l) {
+ return EOF;
+ }
+ theLookahead = EOF;
+ if (c == EOF) {
+ c = input.charAt(get.i);
+ ++get.i;
+ }
+ if (c >= ' ' || c == '\n') {
+ return c;
+ }
+ if (c == '\r') {
+ return '\n';
+ }
+ return ' ';
+ }
+
+ get.i = 0;
+ get.l = input.length;
+
+
+ /* peek -- get the next character without getting it.
+ */
+
+ function peek() {
+ theLookahead = get();
+ return theLookahead;
+ }
+
+
+ /* next -- get the next character, excluding comments. peek() is used to see
+ if a '/' is followed by a '/' or '*'.
+ */
+
+ function next() {
+
+ var c = get();
+ if (c == '/') {
+ switch (peek()) {
+ case '/':
+ for (;;) {
+ c = get();
+ if (c <= '\n') {
+ return c;
+ }
+ }
+ break;
+ case '*':
+ get();
+ for (;;) {
+ switch (get()) {
+ case '*':
+ if (peek() == '/') {
+ get();
+ return ' ';
+ }
+ break;
+ case EOF:
+ throw 'Error: Unterminated comment.';
+ }
+ }
+ break;
+ default:
+ return c;
+ }
+ }
+ return c;
+ }
+
+
+ /* action -- do something! What you do is determined by the argument:
+ 1 Output A. Copy B to A. Get the next B.
+ 2 Copy B to A. Get the next B. (Delete A).
+ 3 Get the next B. (Delete B).
+ action treats a string as a single character. Wow!
+ action recognizes a regular expression if it is preceded by ( or , or =.
+ */
+
+ function action(d) {
+
+ var r = [];
+
+ if (d == 1) {
+ r.push(a);
+ }
+
+ if (d < 3) {
+ a = b;
+ if (a == '\'' || a == '"') {
+ for (;;) {
+ r.push(a);
+ a = get();
+ if (a == b) {
+ break;
+ }
+ if (a <= '\n') {
+ throw 'Error: unterminated string literal: ' + a;
+ }
+ if (a == '\\') {
+ r.push(a);
+ a = get();
+ }
+ }
+ }
+ }
+
+ b = next();
+
+ if (b == '/' && '(,=:[!&|'.has(a)) {
+ r.push(a);
+ r.push(b);
+ for (;;) {
+ a = get();
+ if (a == '/') {
+ break;
+ } else if (a =='\\') {
+ r.push(a);
+ a = get();
+ } else if (a <= '\n') {
+ throw 'Error: unterminated Regular Expression literal';
+ }
+ r.push(a);
+ }
+ b = next();
+ }
+
+ return r.join('');
+ }
+
+
+ /* m -- Copy the input to the output, deleting the characters which are
+ insignificant to JavaScript. Comments will be removed. Tabs will be
+ replaced with spaces. Carriage returns will be replaced with
+ linefeeds.
+ Most spaces and linefeeds will be removed.
+ */
+
+ function m() {
+
+ var r = [];
+ a = '\n';
+
+ r.push(action(3));
+
+ while (a != EOF) {
+ switch (a) {
+ case ' ':
+ if (isAlphanum(b)) {
+ r.push(action(1));
+ } else {
+ r.push(action(2));
+ }
+ break;
+ case '\n':
+ switch (b) {
+ case '{':
+ case '[':
+ case '(':
+ case '+':
+ case '-':
+ r.push(action(1));
+ break;
+ case ' ':
+ r.push(action(3));
+ break;
+ default:
+ if (isAlphanum(b)) {
+ r.push(action(1));
+ } else {
+ if (level == 1 && b != '\n') {
+ r.push(action(1));
+ } else {
+ r.push(action(2));
+ }
+ }
+ }
+ break;
+ default:
+ switch (b) {
+ case ' ':
+ if (isAlphanum(a)) {
+ r.push(action(1));
+ break;
+ }
+ r.push(action(3));
+ break;
+ case '\n':
+ if (level == 1 && a != '\n') {
+ r.push(action(1));
+ } else {
+ switch (a) {
+ case '}':
+ case ']':
+ case ')':
+ case '+':
+ case '-':
+ case '"':
+ case '\'':
+ if (level == 3) {
+ r.push(action(3));
+ } else {
+ r.push(action(1));
+ }
+ break;
+ default:
+ if (isAlphanum(a)) {
+ r.push(action(1));
+ } else {
+ r.push(action(3));
+ }
+ }
+ }
+ break;
+ default:
+ r.push(action(1));
+ break;
+ }
+ }
+ }
+
+ return r.join('');
+ }
+
+ jsmin.oldSize = input.length;
+ ret = m(input);
+ jsmin.newSize = ret.length;
+
+ return comment + ret;
+
+}
+
+(function (a) {
+ if (!a[0]) {
+ print("Usage: jsmin.js file.js");
+ quit(1);
+ }
+ var input = readFile(a[0]);
+ if (!input) {
+ print("jslint: Couldn't open file '" + a[0] + "'.");
+ quit(1);
+ }
+ print(jsmin(input));
+})(arguments);
\ No newline at end of file
projects / euphorik.git / commitdiff