X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=src%2Forg%2Fxwt%2FRes.java;h=228b2893d43aa06e40b08e1104063e7016db003a;hb=ef8baa2af3d8a8869c59acf927242ad153aaed2b;hp=5b1fc5f73d805a225d17406aa5ac354ecbf89b47;hpb=c6069948906645d974f46bdb96617a9a6a504636;p=org.ibex.core.git diff --git a/src/org/xwt/Res.java b/src/org/xwt/Res.java index 5b1fc5f..228b289 100644 --- a/src/org/xwt/Res.java +++ b/src/org/xwt/Res.java @@ -2,45 +2,108 @@ package org.xwt; import java.io.*; +import java.util.*; +import java.util.zip.*; import org.xwt.js.*; +import org.xwt.util.*; +import org.bouncycastle.util.encoders.Base64; -// FIXME: ByteStream fileName property /** base class for XWT resources */ public abstract class Res extends JS { - public String toString() { return "Resource, source=FIXME"; } + public String getDescriptiveName() { return ""; } + public String typeName() { return "resource"; } - public final InputStream getInputStream() { return getInputStream(""); } + /** cache of subresources so that the equality operator works on them */ + private Hash refCache = null; + public Template t = null; + + public Res getParent() { return null; } + + /** returns an InputStream containing the Resource's contents */ + public InputStream getInputStream() throws IOException { return getInputStream(""); } + public abstract InputStream getInputStream(String path) throws IOException; + + /** graft newResource in place of this resource on its parent */ public Res graft(Object newResource) { throw new JS.Exn("cannot graft onto this resource"); } - public Object get(Object key) { return new Ref(this, key); } - public void put(Object key, Object val) { throw new JS.Exn("cannot put to a resource"); } - public Object[] keys() { throw new JS.Exn("cannot enumerate a resource"); } - public abstract InputStream getInputStream(String path) { return getInputStream(""); } - public abstract Res addExtension(String extension); + /** if the path of this resource does not end with extension, return a new one wit it appended */ + public Res addExtension(String extension) { return new Ref(this, extension); } + + public Object[] keys() { throw new JS.Exn("cannot enumerate a resource"); } + public void put(Object key, Object val) { throw new JS.Exn("cannot put to a resource"); } + public Object get(Object key) { + if ("".equals(key)) { + Template t = Template.getTemplate(addExtension(".xwt")); + return t == null ? null : t.getStatic(); + } + Object ret = refCache == null ? null : refCache.get(key); + if (ret != null) return ret; + ret = new Ref(this, key); + if (refCache == null) refCache = new Hash(); + refCache.put(key, ret); + return ret; + } - public static Res stringToRes(String url) { - if (url.indexOf('!') == -1) - return new Zip(stringToRes(url.substring(0, url.lastIndexOf('!'))), - url.substring(url.lastIndexOf('!') + 1)); + public static Res stringToRes(String url) { return stringToRes(url, false); } + public static Res stringToRes(String url, boolean permitLocalFilesystem) { + if (url.indexOf('!') != -1) + return (Res)(new Zip(stringToRes(url.substring(0, url.lastIndexOf('!')))). + get(url.substring(url.lastIndexOf('!') + 1))); if (url.startsWith("http://")) return new HTTP(url); if (url.startsWith("https://")) return new HTTP(url); - throw new JS.Exn("invalid resource specifier"); + if (url.startsWith("file:") && permitLocalFilesystem) return new File(url.substring(5)); + if (url.startsWith("cab:")) return new CAB(stringToRes(url.substring(4))); + if (url.startsWith("data:")) return new ByteArray(Base64.decode(url.substring(5))); + if (url.startsWith("utf8:")) return new ByteArray(url.substring(5).getBytes()); + throw new JS.Exn("invalid resource specifier " + url); + } + + /** subclass from this if you want a CachedInputStream for each path */ + public static abstract class CachedRes extends Res { + private Hash cachedInputStreams = new Hash(); + abstract InputStream _getInputStream(String path) throws IOException; + public final InputStream getInputStream(String path) throws IOException { + CachedInputStream cis = (CachedInputStream)cachedInputStreams.get(path); + if (cis == null) { + cis = new CachedInputStream(_getInputStream(path)); + cachedInputStreams.put(path, cis); + } + return cis.getInputStream(); + } } /** HTTP or HTTPS resource */ - public static class HTTP extends Res { + public static class HTTP extends CachedRes { private String url; HTTP(String url) { this.url = url; } - public InputStream getInputStream(String path) { return new HTTP(url + path).GET(); } + public InputStream _getInputStream(String path) throws IOException { + return new org.xwt.HTTP(url + path).GET(); } + } + + /** byte arrays */ + public static class ByteArray extends Res { + private byte[] bytes; + ByteArray(byte[] bytes) { this.bytes = bytes; } + public InputStream getInputStream(String path) throws IOException { + if (!"".equals(path)) throw new JS.Exn("can't get subresources of a byte[] resource"); + return new ByteArrayInputStream(bytes); + } + } + + /** a file */ + public static class File extends Res { + private String path; + File(String path) { this.path = path; } + public InputStream getInputStream(String rest) throws IOException { + return new FileInputStream((path + rest).replace('/', java.io.File.separatorChar)); } } /** wrap a Res around a preexisting InputStream */ public static class IS extends Res { InputStream parent; IS(InputStream parent) { this.parent = parent; } - public InputStream getInputStream() { return parent; } public InputStream getInputStream(String path) { if (!"".equals(path)) throw new JS.Exn("can't access subresources of IS"); return parent; @@ -51,11 +114,12 @@ public abstract class Res extends JS { public static class Zip extends Res { private Res parent; Zip(Res parent) { this.parent = parent; } - public InputStream getInputStream(String path) { + public InputStream getInputStream(String path) throws IOException { + if (path.startsWith("/")) path = path.substring(1); ZipInputStream zis = new ZipInputStream(parent.getInputStream()); ZipEntry ze = zis.getNextEntry(); while(ze != null && !ze.getName().equals(path)) ze = zis.getNextEntry(); - if (ze == null) throw new JS.Exn("zip file not found in archive"); + if (ze == null) throw new JS.Exn("requested file not found in archive"); return zis; } } @@ -65,9 +129,17 @@ public abstract class Res extends JS { Res parent; Object key; Ref(Res parent, Object key) { this.parent = parent; this.key = key; } - public InputStream getInputStream(path) { + public String getDescriptiveName() { + String pdn = parent.getDescriptiveName(); + return pdn.equals("") ? key.toString() : (pdn + "." + key.toString()); + } + public Res addExtension(String extension) { + return (key instanceof String && ((String)key).endsWith(extension)) ? this : new Ref(parent, key + extension); + } + public InputStream getInputStream(String path) throws IOException { return parent.getInputStream("/" + key + path); } + public Res getParent() { return parent; } public Res graft(Object newResource) { return new Graft(parent, key, newResource); } } @@ -76,15 +148,60 @@ public abstract class Res extends JS { Res graftee; Object replaced_key; Object replaced_val; - Graft(Res graftee, Object key, Object val) { - this.graftee = graftee; replaced_key = key; replaced_val = val; } + Graft(Res graftee, Object key, Object val) { this.graftee = graftee; replaced_key = key; replaced_val = val; } public boolean equals(Object o) { return (this == o || graftee.equals(o)); } - public Object get(Object key) { - return replaced_key.equals(key) ? replaced_val : graftee.get(key); + public int hashCode() { return graftee.hashCode(); } + public InputStream getInputStream(String s) throws IOException { return graftee.getInputStream(s); } + public Object get(Object key) { return replaced_key.equals(key) ? replaced_val : graftee.get(key); } + public String getDescriptiveName() { return graftee.getDescriptiveName(); } + public Res getParent() { return graftee.getParent(); } + } + + /** shadow resource which replaces the graft */ + public static class ProgressWatcher extends Res { + Res watchee; + JS.Callable callback; + ProgressWatcher(Res watchee, JS.Callable callback) { this.watchee = watchee; this.callback = callback; } + public InputStream getInputStream(String s) throws IOException { + return new FilterInputStream(watchee.getInputStream(s)) { + int bytesDownloaded = 0; + public int read() throws IOException { + int ret = super.read(); + if (ret != -1) bytesDownloaded++; + return ret; + } + public int read(byte[] b, int off, int len) throws IOException { + int ret = super.read(b, off, len); + if (ret != 1) bytesDownloaded += ret; + ThreadMessage.newthread(new JS.Callable() { public Object call(JS.Array a) { + JS.Array args = new JS.Array(); + args.addElement(new Integer(bytesDownloaded)); + callback.call(args); + return null; + } }); + return ret; + } + }; } } - /////////////// bytestream + /** unpacks a Microsoft CAB file (possibly embedded in another file; we scan for 'MSCF' */ + public static class CAB extends Res { + private Res parent; + CAB(Res parent) { this.parent = parent; } + private int swap_endian(int i) { + return ((i & 0xff) << 24) | ((i & 0xff00) << 8) | ((i & 0xff0000) >>> 8) | (i >>> 24); + } + public InputStream getInputStream(String path) throws IOException { + try { + return org.xwt.util.CAB.getFileInputStream(parent.getInputStream(), 2, path); + } catch (EOFException eof) { + throw new JS.Exn("MSCF header tag not found in file"); + } catch (IOException ioe) { + throw new JS.Exn("IOException while reading file"); + } + } + } public Object callMethod(Object method, Array args, boolean checkOnly) throws JS.Exn { if (method.equals("getUTF")) { @@ -102,11 +219,11 @@ public abstract class Res extends JS { } return caw.toString(); } catch (IOException e) { - if (Log.on) Log.log(ByteStream.class, "IO Exception while reading from file"); - if (Log.on) Log.log(ByteStream.class, e); - throw new JS.Exn("error while reading from ByteStream"); + if (Log.on) Log.log(Res.class, "IO Exception while reading from file"); + if (Log.on) Log.log(Res.class, e); + throw new JS.Exn("error while reading from Resource"); } - } else if (name.equals("getDOM")) { + } else if (method.equals("getDOM")) { if (checkOnly) return Boolean.TRUE; if (args.length() != 0) return null; return new XMLHelper().doParse(); @@ -155,9 +272,9 @@ public abstract class Res extends JS { } catch (XML.XMLException e) { throw new JS.Exn("error parsing XML: " + e.toString()); } catch (IOException e) { - if (Log.on) Log.log(ByteStream.class, "IO Exception while reading from file"); - if (Log.on) Log.log(ByteStream.class, e); - throw new JS.Exn("error reading from ByteStream"); + if (Log.on) Log.log(this, "IO Exception while reading from file"); + if (Log.on) Log.log(this, e); + throw new JS.Exn("error reading from Resource"); } return obStack.size() >= 1 ? (JS)obStack.elementAt(0) : null; }