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