protected String[] escapePaths(String srcPath, String dstPath) {
srcPath = srcPath.trim();
dstPath = dstPath.trim();
String os = System.getProperty("os.name").toLowerCase();
if (os != null && os.indexOf("windows") > -1) {
srcPath = "\"" + srcPath + "\"";
dstPath = "\"" + dstPath + "\"";
} else {
int lastidx = -1, curridx;
StringBuffer buff = new StringBuffer(srcPath);
while ((curridx = buff.indexOf(" ", lastidx)) > 0) {
buff.insert(curridx, "\\");
lastidx = curridx + 2;
}
srcPath = buff.toString();
buff = new StringBuffer(dstPath);
lastidx = -1;
while ((curridx = buff.indexOf(" ", lastidx)) > 0) {
buff.insert(curridx, "\\");
lastidx = curridx + 2;
}
dstPath = buff.toString();
}
return new String[] {srcPath, dstPath};
}
// 得到的tokens包含源代码的由词法分析器分析出的所有单词，但不包含注释
private static ArrayList<JavaScriptToken> parse(
Reader in, ErrorReporter reporter) // 返回tokens（保存的是源文件中出现的javascript关键字和NAME，REGEXP，STRING等类型）
throws IOException, EvaluatorException {
CompilerEnvirons env = new CompilerEnvirons(); // 创建编译环境对象
env.setLanguageVersion(Context.VERSION_1_7); // 设置语言版本
Parser parser = new Parser(env, reporter); // 创建解释器对象
parser.parse(in, null, 1); // 解释输入流
String source = parser.getEncodedSource(); // 获得已编码的源码（词法分析阶段通常是把从源程序中识别出的各个单词的词文
// 转换为某种内部表示
int offset = 0;
int length = source.length();
ArrayList<JavaScriptToken> tokens = new ArrayList<JavaScriptToken>();
StringBuffer sb = new StringBuffer();
while (offset < length) {
int tt = source.charAt(offset++); // 获取特定位置上的字符，并转化为ASCII编码
switch (tt) {
case Token.CONDCOMMENT: // 条件注释
case Token.KEEPCOMMENT: // 注释
case Token.NAME: //
case Token.REGEXP: // 正则表达式类型
case Token.STRING: // String类型,js程序中双引号或单引号括起来的字符串
sb.setLength(0);
offset = printSourceString(source, offset, sb);
tokens.add(new JavaScriptToken(tt, sb.toString()));
break;
case Token.NUMBER: // Number类型
sb.setLength(0);
offset = printSourceNumber(source, offset, sb);
tokens.add(new JavaScriptToken(tt, sb.toString()));
break;
default:
String literal = literals.get(new Integer(tt));
if (literal != null) { // 若不为空，说明哈希表literals中含有键new
// Integer(tt)所对应的值
tokens.add(new JavaScriptToken(tt, literal)); // 将此关键字保存到数组列表tokens中
}
break;
}
}
/*
* //begin Iterator<JavaScriptToken> iterator = tokens.iterator();
* JavaScriptToken token; while(iterator.hasNext()) { token =
* iterator.next();
* System.out.println(token.getType()+"\t"+token.getValue()); } //end
*/
return tokens;
}
public String toString() {
StringBuffer sb = new StringBuffer();
sb.append(getClass().getName());
sb.append('@');
sb.append(Integer.toHexString(System.identityHashCode(this)));
sb.append(" (context=");
sb.append(_context);
sb.append(", static_permitions=");
sb.append(_statisPermissions);
sb.append(')');
return sb.toString();
}
protected int[] resize(
int thumbWidth,
int thumbHeight,
int imageWidth,
int imageHeight,
String srcPath,
String dstPath,
boolean scaleComputed) {
if (!scaleComputed) {
int[] dims = computeResizedDimensions(thumbWidth, thumbHeight, imageWidth, imageHeight);
thumbWidth = dims[0];
thumbHeight = dims[1];
}
String[] paths = escapePaths(srcPath, dstPath);
srcPath = paths[0];
dstPath = paths[1];
String cmd = core.app.getProperty("imagemagick");
boolean success = false;
if (cmd == null) {
RenderedOp resizedImage =
this.resizeJAI(
thumbWidth,
thumbHeight,
FileLoadDescriptor.create(srcPath, null, null, null),
false); // Don't like the pre-calculated scaling. Recalculate it.
String type = dstPath.substring(dstPath.lastIndexOf(".") + 1);
success = writeImage(dstPath, type, resizedImage);
} else {
if (!cmd.endsWith("convert")) {
if (!cmd.endsWith(File.separator)) {
cmd += File.separator;
}
cmd += "convert";
}
StringBuffer command = new StringBuffer(cmd);
command.append(" -geometry ");
command.append(thumbWidth).append("x").append(thumbHeight);
command.append(" ").append(srcPath);
command.append(" ").append(dstPath);
success = exec(command.toString());
}
if (success) {
return new int[] {thumbWidth, thumbHeight};
}
return null;
}
/** Returns the source URL for the given script or function. */
private String getNormalizedUrl(DebuggableScript fnOrScript) {
String url = fnOrScript.getSourceName();
if (url == null) {
url = "<stdin>";
} else {
// Not to produce window for eval from different lines,
// strip line numbers, i.e. replace all #[0-9]+\(eval\) by
// (eval)
// Option: similar teatment for Function?
char evalSeparator = '#';
StringBuffer sb = null;
int urlLength = url.length();
int cursor = 0;
for (; ; ) {
int searchStart = url.indexOf(evalSeparator, cursor);
if (searchStart < 0) {
break;
}
String replace = null;
int i = searchStart + 1;
while (i != urlLength) {
int c = url.charAt(i);
if (!('0' <= c && c <= '9')) {
break;
}
++i;
}
if (i != searchStart + 1) {
// i points after #[0-9]+
if ("(eval)".regionMatches(0, url, i, 6)) {
cursor = i + 6;
replace = "(eval)";
}
}
if (replace == null) {
break;
}
if (sb == null) {
sb = new StringBuffer();
sb.append(url.substring(0, searchStart));
}
sb.append(replace);
}
if (sb != null) {
if (cursor != urlLength) {
sb.append(url.substring(cursor));
}
url = sb.toString();
}
}
return url;
}
@Override
String toXMLString() {
// See ECMA 10.2.1
StringBuffer sb = new StringBuffer();
for (int i = 0; i < length(); i++) {
if (getProcessor().isPrettyPrinting() && i != 0) {
sb.append('\n');
}
sb.append(getXmlFromAnnotation(i).toXMLString());
}
return sb.toString();
}
protected int[] crop(
int width, int height, int offsetx, int offsety, String srcPath, String dstPath) {
String[] paths = escapePaths(srcPath, dstPath);
srcPath = paths[0];
dstPath = paths[1];
boolean success = false;
String cmd = core.app.getProperty("imagemagick");
if (cmd == null) {
ParameterBlock args = new ParameterBlock();
args.addSource(FileLoadDescriptor.create(srcPath, null, null, null));
args.add((float) offsetx);
args.add((float) offsety);
args.add((float) width);
args.add((float) height);
RenderedOp croppedImage = JAI.create("crop", args);
String type = dstPath.substring(dstPath.lastIndexOf(".") + 1);
success = writeImage(dstPath, type, croppedImage);
} else {
if (!cmd.endsWith("convert")) {
if (!cmd.endsWith(File.separator)) {
cmd += File.separator;
}
cmd += "convert";
}
StringBuffer command = new StringBuffer(cmd);
command.append(" -crop ");
command
.append(width)
.append("x")
.append(height)
.append("+")
.append(offsetx)
.append("+")
.append(offsety)
.append("!");
command.append(" ").append(srcPath);
command.append(" ").append(dstPath);
success = exec(command.toString());
}
if (success) {
return new int[] {width, height};
}
return null;
}
/**
* Adds another Image object as a thumbnail (child) of this Image object, which can be retrieved
* using <code> getThumbnail(accessname) </code>.
*
* @param {Image} child The Image object to add as a child of this Image object
* @param {String} [accessname] The accessname by which the child Image object may be retrieved by
* calling getThumbnail(accessname). If this argument is left unspecified, defaults to a
* String "[width]x[height]". So if the width is 200 and the height is 100, the default
* accessname will be 200x100
* @returns {Boolean} Whether the operation was a success or not. If there is already an Image
* object with the same name as accessname located as a child of this Image object, then it
* will fail and return <code> false </code>
*/
public boolean jsFunction_addThumbnail(Object child, Object accessname) {
if (child instanceof ImageObject) {
ImageObject th = (ImageObject) child;
StringBuffer sb = new StringBuffer();
if (accessname != null && accessname != Scriptable.NOT_FOUND) {
sb.append((String) accessname);
} else {
sb.append(th.getDimension(WIDTH)).append("x").append(th.getDimension(HEIGHT));
}
th.node.setString(FileObject.ACCESSNAME, sb.toString());
return super.jsFunction_add(th);
}
return false;
}
private String getDebugString(int max) {
assert max > 0;
StringBuffer result = new StringBuffer();
int start = Math.max(offset - max, 0);
int end = Math.min(offset + max, tokens.size());
for (int i = start; i < end; i++) {
JavaScriptToken token = tokens.get(i);
if (i == offset - 1) {
result.append(" ---> ");
}
result.append(token.getValue());
if (i == offset - 1) {
result.append(" <--- ");
}
}
return result.toString();
}
// Add necessary escaping that was removed in Rhino's tokenizer（词法分析器）.
private static String escapeString(String s, char quotechar) {
assert quotechar == '"'
|| quotechar == '\''; // 如果启用了断言，则表达式为假时，程序抛出AssertionError（这是一个错误，不是异常，所以不能被捕获）
if (s == null) {
return null;
}
StringBuffer sb = new StringBuffer();
for (int i = 0, L = s.length(); i < L; i++) {
int c = s.charAt(i);
if (c == quotechar) {
sb.append("\\");
}
sb.append((char) c);
}
return sb.toString();
}
@Override
public String toString() {
// ECMA357 10.1.2
if (hasSimpleContent()) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i < length(); i++) {
XML next = getXmlFromAnnotation(i);
if (next.isComment() || next.isProcessingInstruction()) {
// do nothing
} else {
sb.append(next.toString());
}
}
return sb.toString();
} else {
return toXMLString();
}
}
public String printMungeMapping() {
StringBuffer sb = new StringBuffer();
globalScope.getFullMapping(sb, "");
return sb.toString();
}
