| // Copyright (C) 2009 The Android Open Source Project |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package com.google.gwtexpui.css.rebind; |
| |
| import com.google.gwt.core.ext.LinkerContext; |
| import com.google.gwt.core.ext.TreeLogger; |
| import com.google.gwt.core.ext.UnableToCompleteException; |
| import com.google.gwt.core.ext.linker.AbstractLinker; |
| import com.google.gwt.core.ext.linker.Artifact; |
| import com.google.gwt.core.ext.linker.ArtifactSet; |
| import com.google.gwt.core.ext.linker.LinkerOrder; |
| import com.google.gwt.core.ext.linker.PublicResource; |
| import com.google.gwt.core.ext.linker.impl.StandardLinkerContext; |
| import com.google.gwt.core.ext.linker.impl.StandardStylesheetReference; |
| import com.google.gwt.dev.util.Util; |
| |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.HashMap; |
| |
| @LinkerOrder(LinkerOrder.Order.PRE) |
| public class CssLinker extends AbstractLinker { |
| @Override |
| public String getDescription() { |
| return "CssLinker"; |
| } |
| |
| @Override |
| public ArtifactSet link(final TreeLogger logger, final LinkerContext context, |
| final ArtifactSet artifacts) throws UnableToCompleteException { |
| final ArtifactSet returnTo = new ArtifactSet(); |
| int index = 0; |
| |
| final HashMap<String, PublicResource> css = new HashMap<>(); |
| |
| for (final StandardStylesheetReference ssr : artifacts |
| .<StandardStylesheetReference> find(StandardStylesheetReference.class)) { |
| css.put(ssr.getSrc(), null); |
| } |
| for (final PublicResource pr : artifacts |
| .<PublicResource> find(PublicResource.class)) { |
| if (css.containsKey(pr.getPartialPath())) { |
| css.put(pr.getPartialPath(), new CssPubRsrc(name(logger, pr), pr)); |
| } |
| } |
| |
| for (Artifact<?> a : artifacts) { |
| if (a instanceof PublicResource) { |
| final PublicResource r = (PublicResource) a; |
| if (css.containsKey(r.getPartialPath())) { |
| a = css.get(r.getPartialPath()); |
| } |
| } else if (a instanceof StandardStylesheetReference) { |
| final StandardStylesheetReference r = (StandardStylesheetReference) a; |
| final PublicResource p = css.get(r.getSrc()); |
| a = new StandardStylesheetReference(p.getPartialPath(), index); |
| } |
| |
| returnTo.add(a); |
| index++; |
| } |
| return returnTo; |
| } |
| |
| private String name(final TreeLogger logger, final PublicResource r) |
| throws UnableToCompleteException { |
| final ByteArrayOutputStream tmp = new ByteArrayOutputStream(); |
| try (InputStream in = r.getContents(logger)) { |
| final byte[] buf = new byte[2048]; |
| int n; |
| while ((n = in.read(buf)) >= 0) { |
| tmp.write(buf, 0, n); |
| } |
| tmp.close(); |
| } catch (IOException e) { |
| final UnableToCompleteException ute = new UnableToCompleteException(); |
| ute.initCause(e); |
| throw ute; |
| } |
| |
| String base = r.getPartialPath(); |
| final int s = base.lastIndexOf('/'); |
| if (0 < s) { |
| base = base.substring(0, s + 1); |
| } else { |
| base = ""; |
| } |
| return base + Util.computeStrongName(tmp.toByteArray()) + ".cache.css"; |
| } |
| |
| private static class CssPubRsrc extends PublicResource { |
| private static final long serialVersionUID = 1L; |
| private final PublicResource src; |
| |
| CssPubRsrc(final String partialPath, final PublicResource r) { |
| super(StandardLinkerContext.class, partialPath); |
| src = r; |
| } |
| |
| @Override |
| public InputStream getContents(final TreeLogger logger) |
| throws UnableToCompleteException { |
| return src.getContents(logger); |
| } |
| |
| @Override |
| public long getLastModified() { |
| return src.getLastModified(); |
| } |
| } |
| } |