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commit 0fe02780efec76e8ab83919beb6e0d82d53be4d9 0 parents
@rgrove authored
5 HISTORY
@@ -0,0 +1,5 @@
+CSSMin History
+================================================================================
+
+Version 1.0.0 (2008-03-22)
+ * First release.
62 Rakefile.rb
@@ -0,0 +1,62 @@
+#--
+# Copyright (c) 2008 Ryan Grove <ryan@wonko.com>
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are met:
+#
+# * Redistributions of source code must retain the above copyright notice,
+# this list of conditions and the following disclaimer.
+# * Redistributions in binary form must reproduce the above copyright notice,
+# this list of conditions and the following disclaimer in the documentation
+# and/or other materials provided with the distribution.
+# * Neither the name of this project nor the names of its contributors may be
+# used to endorse or promote products derived from this software without
+# specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#++
+
+require 'rubygems'
+require 'rake/gempackagetask'
+require 'rake/rdoctask'
+
+thoth_gemspec = Gem::Specification.new do |s|
+ s.rubyforge_project = 'riposte'
+
+ s.name = 'jsmin'
+ s.version = '1.0.0'
+ s.author = 'Ryan Grove'
+ s.email = 'ryan@wonko.com'
+ s.homepage = 'http://github.com/rgrove/jsmin/'
+ s.platform = Gem::Platform::RUBY
+ s.summary = "Ruby implementation of Douglas Crockford's JSMin JavaScript " +
+ "minifier."
+
+ s.files = FileList['{lib}/**/*', 'HISTORY'].to_a
+ s.require_path = 'lib'
+ s.has_rdoc = true
+
+ s.required_ruby_version = '>= 1.8.6'
+end
+
+Rake::GemPackageTask.new(thoth_gemspec) do |p|
+ p.need_tar_gz = true
+end
+
+Rake::RDocTask.new do |rd|
+ rd.main = 'JSMin'
+ rd.title = 'JSMin'
+ rd.rdoc_dir = 'doc'
+
+ rd.rdoc_files.include('lib/**/*.rb')
+end
233 lib/jsmin.rb
@@ -0,0 +1,233 @@
+#--
+# jsmin.rb - Ruby implementation of Douglas Crockford's JSMin.
+#
+# This is a port of jsmin.c, and is distributed under the same terms, which are
+# as follows:
+#
+# 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.
+#++
+
+require 'strscan'
+
+# = JSMin
+#
+# Ruby implementation of Douglas Crockford's JavaScript minifier, JSMin.
+#
+# Author:: Ryan Grove (mailto:ryan@wonko.com)
+# Version:: 1.0.0 (2008-03-22)
+# Copyright:: Copyright (c) 2008 Ryan Grove. All rights reserved.
+# Website:: http://github.com/rgrove/jsmin/
+#
+# == Example
+#
+# require 'rubygems'
+# require 'jsmin'
+#
+# File.open('example.js', 'r') {|file| puts JSMin.minify(file) }
+#
+module JSMin
+ ORD_LF = "\n"[0].freeze
+ ORD_SPACE = ' '[0].freeze
+
+ class << self
+
+ # Reads JavaScript from +input+ (which can be a String or an IO object) and
+ # returns a String containing minified JS.
+ def minify(input)
+ @js = StringScanner.new(input.is_a?(IO) ? input.read : input.to_s)
+
+ @a = "\n"
+ @b = nil
+ @lookahead = nil
+ @output = ''
+
+ action_get
+
+ while !@a.nil? do
+ case @a
+ when ' '
+ if alphanum?(@b)
+ action_output
+ else
+ action_copy
+ end
+
+ when "\n"
+ if @b == ' '
+ action_get
+ elsif @b =~ /[{\[\(+-]/
+ action_output
+ else
+ if alphanum?(@b)
+ action_output
+ else
+ action_copy
+ end
+ end
+
+ else
+ if @b == ' '
+ if alphanum?(@a)
+ action_output
+ else
+ action_get
+ end
+ elsif @b == "\n"
+ if @a =~ /[}\]\)\\"+-]/
+ action_output
+ else
+ if alphanum?(@a)
+ action_output
+ else
+ action_get
+ end
+ end
+ else
+ action_output
+ end
+ end
+ end
+
+ @output
+ end
+
+ private
+
+ # Corresponds to action(1) in jsmin.c.
+ def action_output
+ @output << @a
+ action_copy
+ end
+
+ # Corresponds to action(2) in jsmin.c.
+ def action_copy
+ @a = @b
+
+ if @a == '\'' || @a == '"'
+ loop do
+ @output << @a
+ @a = get
+
+ break if @a == @b
+
+ if @a[0] <= ORD_LF
+ raise "JSMin parse error: unterminated string literal: #{@a}"
+ end
+
+ if @a == '\\'
+ @output << @a
+ @a = get
+
+ if @a[0] <= ORD_LF
+ raise "JSMin parse error: unterminated string literal: #{@a}"
+ end
+ end
+ end
+ end
+
+ action_get
+ end
+
+ # Corresponds to action(3) in jsmin.c.
+ def action_get
+ @b = nextchar
+
+ if @b == '/' && (@a == "\n" || @a =~ /[\(,=:\[!&|?{};]/)
+ @output << @a
+ @output << @b
+
+ loop do
+ @a = get
+
+ if @a == '/'
+ break
+ elsif @a == '\\'
+ @output << @a
+ @a = get
+ elsif @a[0] <= ORD_LF
+ raise "JSMin parse error: unterminated regular expression " +
+ "literal: #{@a}"
+ end
+
+ @output << @a
+ end
+
+ @b = nextchar
+ end
+ end
+
+ # Returns true if +c+ is a letter, digit, underscore, dollar sign,
+ # backslash, or non-ASCII character.
+ def alphanum?(c)
+ c.is_a?(String) && !c.empty? && (c[0] > 126 || c =~ /[0-9a-z_$\\]/i)
+ end
+
+ # Returns the next character from the input. If the character is a control
+ # character, it will be translated to a space or linefeed.
+ def get
+ c = @lookahead.nil? ? @js.getch : @lookahead
+ @lookahead = nil
+
+ return c if c.nil? || c == "\n" || c[0] >= ORD_SPACE
+ return "\n" if c == "\r"
+ return ' '
+ end
+
+ # Gets the next character, excluding comments.
+ def nextchar
+ c = get
+ return c unless c == '/'
+
+ case peek
+ when '/'
+ loop do
+ c = get
+ return c if c[0] <= ORD_LF
+ end
+
+ when '*'
+ get
+ loop do
+ case get
+ when '*'
+ if peek == '/'
+ get
+ return ' '
+ end
+
+ when nil
+ raise 'JSMin parse error: unterminated comment'
+ end
+ end
+
+ else
+ return c
+ end
+ end
+
+ # Gets the next character without getting it.
+ def peek
+ @lookahead = get
+ end
+ end
+end
3,871 test/jslint.js
3,871 additions, 0 deletions not shown
279 test/jsmin.c
@@ -0,0 +1,279 @@
+/* jsmin.c
+ 2007-12-04
+
+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.
+*/
+
+#include <stdlib.h>
+#include <stdio.h>
+
+static int theA;
+static int theB;
+static int theLookahead = EOF;
+
+
+/* isAlphanum -- return true if the character is a letter, digit, underscore,
+ dollar sign, or non-ASCII character.
+*/
+
+static int
+isAlphanum(int c)
+{
+ return ((c >= 'a' && c <= 'z') || (c >= '0' && c <= '9') ||
+ (c >= 'A' && c <= 'Z') || c == '_' || c == '$' || c == '\\' ||
+ c > 126);
+}
+
+
+/* get -- return the next character from stdin. Watch out for lookahead. If
+ the character is a control character, translate it to a space or
+ linefeed.
+*/
+
+static int
+get()
+{
+ int c = theLookahead;
+ theLookahead = EOF;
+ if (c == EOF) {
+ c = getc(stdin);
+ }
+ if (c >= ' ' || c == '\n' || c == EOF) {
+ return c;
+ }
+ if (c == '\r') {
+ return '\n';
+ }
+ return ' ';
+}
+
+
+/* peek -- get the next character without getting it.
+*/
+
+static int
+peek()
+{
+ theLookahead = get();
+ return theLookahead;
+}
+
+
+/* next -- get the next character, excluding comments. peek() is used to see
+ if a '/' is followed by a '/' or '*'.
+*/
+
+static int
+next()
+{
+ int c = get();
+ if (c == '/') {
+ switch (peek()) {
+ case '/':
+ for (;;) {
+ c = get();
+ if (c <= '\n') {
+ return c;
+ }
+ }
+ case '*':
+ get();
+ for (;;) {
+ switch (get()) {
+ case '*':
+ if (peek() == '/') {
+ get();
+ return ' ';
+ }
+ break;
+ case EOF:
+ fprintf(stderr, "Error: JSMIN Unterminated comment.\n");
+ exit(1);
+ }
+ }
+ 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 =.
+*/
+
+static void
+action(int d)
+{
+ switch (d) {
+ case 1:
+ putc(theA, stdout);
+ case 2:
+ theA = theB;
+ if (theA == '\'' || theA == '"') {
+ for (;;) {
+ putc(theA, stdout);
+ theA = get();
+ if (theA == theB) {
+ break;
+ }
+ if (theA <= '\n') {
+ fprintf(stderr,
+"Error: JSMIN unterminated string literal: %c\n", theA);
+ exit(1);
+ }
+ if (theA == '\\') {
+ putc(theA, stdout);
+ theA = get();
+ if (theA <= '\n') {
+ fprintf(stderr,
+ "Error: JSMIN unterminated string literal: %c\n", '\\');
+ exit(1);
+ }
+ }
+ }
+ }
+ case 3:
+ theB = next();
+ if (theB == '/' && (theA == '(' || theA == ',' || theA == '=' ||
+ theA == ':' || theA == '[' || theA == '!' ||
+ theA == '&' || theA == '|' || theA == '?' ||
+ theA == '{' || theA == '}' || theA == ';' ||
+ theA == '\n')) {
+ putc(theA, stdout);
+ putc(theB, stdout);
+ for (;;) {
+ theA = get();
+ if (theA == '/') {
+ break;
+ } else if (theA =='\\') {
+ putc(theA, stdout);
+ theA = get();
+ } else if (theA <= '\n') {
+ fprintf(stderr,
+"Error: JSMIN unterminated Regular Expression literal.\n", theA);
+ exit(1);
+ }
+ putc(theA, stdout);
+ }
+ theB = next();
+ }
+ }
+}
+
+
+/* jsmin -- 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.
+*/
+
+static void
+jsmin()
+{
+ theA = '\n';
+ action(3);
+ while (theA != EOF) {
+ switch (theA) {
+ case ' ':
+ if (isAlphanum(theB)) {
+ action(1);
+ } else {
+ action(2);
+ }
+ break;
+ case '\n':
+ switch (theB) {
+ case '{':
+ case '[':
+ case '(':
+ case '+':
+ case '-':
+ action(1);
+ break;
+ case ' ':
+ action(3);
+ break;
+ default:
+ if (isAlphanum(theB)) {
+ action(1);
+ } else {
+ action(2);
+ }
+ }
+ break;
+ default:
+ switch (theB) {
+ case ' ':
+ if (isAlphanum(theA)) {
+ action(1);
+ break;
+ }
+ action(3);
+ break;
+ case '\n':
+ switch (theA) {
+ case '}':
+ case ']':
+ case ')':
+ case '+':
+ case '-':
+ case '"':
+ case '\'':
+ action(1);
+ break;
+ default:
+ if (isAlphanum(theA)) {
+ action(1);
+ } else {
+ action(3);
+ }
+ }
+ break;
+ default:
+ action(1);
+ break;
+ }
+ }
+ }
+}
+
+
+/* main -- Output any command line arguments as comments
+ and then minify the input.
+*/
+extern int
+main(int argc, char* argv[])
+{
+ int i;
+ for (i = 1; i < argc; i += 1) {
+ fprintf(stdout, "// %s\n", argv[i]);
+ }
+ jsmin();
+ return 0;
+}
5 test/test.rb
@@ -0,0 +1,5 @@
+require '../lib/jsmin'
+
+File.open('jslint.js', 'r') do |input|
+ File.open('out-ruby.js', 'w') {|output| output << JSMin.minify(input) }
+end
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