给 JSMin 写了一个 .NET 2.0 的图形界面程序

JavaScript 压缩器 JSMin 是一个用于移除 JavaScript 文件中的注释和无用空白的过滤器。它可以显著将文件尺寸减半,使下载速度大大加快。 不过这个工具只提供了一个命令行版本,对于不熟悉命令行操作的人来说,这个工具不是很方便,而且如果要将多个文件压缩合并成一个时,也会很麻烦,另外,如果输入输出都是同一个文件的话,这个工具也会有问题。 为了方便自己使用,我利用它给出的 C# 算法代码,编写了一个 .NET 2.0 的图形界面程序。这个程序界面虽然很简单,但是功能还是比较全面的。
  1. 它可以向命令行版本一样,采用图形界面操作来完成压缩一个 JavaScript 脚本文件。
  2. 输入文件可以和输出文件相同。
  3. 可以选择输入多个 JavaScript 脚本文件,合并压缩为一个 JavaScript 脚本文件。
  4. 当输入多个 JavaScript 脚本文件时,可以指定它们合并的前后顺序。
  5. 输入文件可以直接拖放到列表中,而不必非要用打开对话框添加。
  6. 可自动判断输入文件是否重复添加。
  7. 增加了对注释中条件编译语句压缩的支持。
下载: jsmingui.zip 注意:需要安装 .NET 2.0 运行库才能运行该程序。
 
由Douglas Crockford创建的JSMin一个筛选程序,用于JavaScript文件中删除注释和不必要的空格。这个程序通常能够使文件大小减半,从而节省下载时间。 压缩包里包含了用C的源码,及可执行程序 由于看到三条评论说没有用,在里我必须说明一下,下面那三个白痴肯定没学过c语言,更没用过c编译好的.exe文件。 以下是c里的源码大家可以先看觉得可用再下 #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 == '\\') { putc(theA, stdout); theA = get(); } if (theA == EOF) { fprintf(stderr, "Error: JSMIN unterminated string literal."); 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 == '[') { for (;;) { putc(theA, stdout); theA = get(); if (theA == ']') { break; } if (theA == '\\') { putc(theA, stdout); theA = get(); } if (theA == EOF) { fprintf(stderr, "Error: JSMIN unterminated set in Regular Expression literal.\n"); exit(1); } } } else if (theA == '/') { break; } else if (theA =='\\') { putc(theA, stdout); theA = get(); } if (theA == EOF) { fprintf(stderr, "Error: JSMIN unterminated Regular Expression literal.\n"); 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; }
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