Revert "Replace create_standalone_js.py with a custom GWT linker"

java/org/chromium/distiller/dev/DistillerScriptLinker.java

-/*
- * Copyright 2008 Google Inc.
- *
- * 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 org.chromium.distiller.dev;
-
-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.Artifact;
-import com.google.gwt.core.ext.linker.ArtifactSet;
-import com.google.gwt.core.ext.linker.CompilationResult;
-import com.google.gwt.core.ext.linker.EmittedArtifact;
-import com.google.gwt.core.ext.linker.LinkerOrder;
-import com.google.gwt.core.ext.linker.LinkerOrder.Order;
-import com.google.gwt.core.ext.linker.Shardable;
-import com.google.gwt.core.ext.linker.Transferable;
-import com.google.gwt.core.ext.linker.impl.SelectionScriptLinker;
-import com.google.gwt.dev.About;
-import com.google.gwt.dev.util.DefaultTextOutput;
-
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Set;
-
-/**
- * A Linker for producing a single JavaScript file from a GWT module. The use of
- * this Linker requires that the module has exactly one distinct compilation
- * result. This linker produces less unused boilerplate than the GWT
- * SingleScriptLinker.
- */
-@LinkerOrder(Order.PRIMARY)
-@Shardable
-public class DistillerScriptLinker extends SelectionScriptLinker {
-  @Override
-  public String getDescription() {
-    return "Distiller Script";
-  }
-
-  @Transferable
-  private static class Script extends Artifact<Script> {
-    private final String javaScript;
-    private final String strongName;
-
-    public Script(String strongName, String javaScript) {
-      super(DistillerScriptLinker.class);
-      this.strongName = strongName;
-      this.javaScript = javaScript;
-    }
-
-    @Override
-    public int compareToComparableArtifact(Script that) {
-      int res = strongName.compareTo(that.strongName);
-      if (res == 0) {
-        res = javaScript.compareTo(that.javaScript);
-      }
-      return res;
-    }
-
-    @Override
-    public Class<Script> getComparableArtifactType() {
-      return Script.class;
-    }
-
-    public String getJavaScript() {
-      return javaScript;
-    }
-
-    public String getStrongName() {
-      return strongName;
-    }
-
-    @Override
-    public int hashCode() {
-      return strongName.hashCode() ^ javaScript.hashCode();
-    }
-
-    @Override
-    public String toString() {
-      return "Script " + strongName;
-    }
-  }
-
-  @Override
-  protected Collection<Artifact<?>> doEmitCompilation(TreeLogger logger,
-      LinkerContext context, CompilationResult result, ArtifactSet artifacts)
-      throws UnableToCompleteException {
-
-    String[] js = result.getJavaScript();
-    if (js.length != 1) {
-      logger.branch(TreeLogger.ERROR,
-          "The module must not have multiple fragments when using the "
-              + getDescription() + " Linker.", null);
-      throw new UnableToCompleteException();
-    }
-
-    Collection<Artifact<?>> toReturn = new ArrayList<Artifact<?>>();
-    toReturn.add(new Script(result.getStrongName(), js[0]));
-    toReturn.addAll(emitSelectionInformation(result.getStrongName(), result));
-    return toReturn;
-  }
-
-  @Override
-  protected EmittedArtifact emitSelectionScript(TreeLogger logger,
-      LinkerContext context, ArtifactSet artifacts)
-      throws UnableToCompleteException {
-
-    // Find the single Script result.
-    Set<Script> results = artifacts.find(Script.class);
-    if (results.size() != 1) {
-      logger.log(TreeLogger.ERROR, "The module must have exactly one distinct"
-          + " permutation when using the " + getDescription() + " Linker; found " + results.size(),
-          null);
-      throw new UnableToCompleteException();
-    }
-    Script result = results.iterator().next();
-
-    DefaultTextOutput out = new DefaultTextOutput(true);
-
-    // Emit the module's JS as a closure.
-    out.print("(function () {");
-    out.newlineOpt();
-    out.print("var $gwt_version = \"" + About.getGwtVersionNum() + "\";");
-    out.newlineOpt();
-    out.print("var $wnd = window; /* our linker */");
-    out.newlineOpt();
-    out.print("var $doc = $wnd.document;");
-    out.newlineOpt();
-    out.print("var $moduleName, $moduleBase;");
-    out.newlineOpt();
-    out.print("var $stats = $wnd.__gwtStatsEvent ? function(a) {$wnd.__gwtStatsEvent(a)} : null;");
-    out.newlineOpt();
-
-    out.print("var $strongName = '" + result.getStrongName() + "';");
-    out.newlineOpt();
-
-    out.print(result.getJavaScript());
-
-    out.newlineOpt();
-    out.print("gwtOnLoad(undefined, \"" + context.getModuleFunctionName() + "\", \"\", 0);");
-    out.newlineOpt();
-    out.print("})();");
-    out.newlineOpt();
-
-    return emitString(logger, out.toString(), context.getModuleName()
-        + ".nocache.js");
-  }
-
-  /**
-   * Unimplemented. Normally required by
-   * {@link #doEmitCompilation(TreeLogger, LinkerContext, CompilationResult, ArtifactSet)}.
-   */
-  @Override
-  protected String getCompilationExtension(TreeLogger logger,
-      LinkerContext context) throws UnableToCompleteException {
-    throw new UnableToCompleteException();
-  }
-
-  /**
-   * Unimplemented. Normally required by
-   * {@link #doEmitCompilation(TreeLogger, LinkerContext, CompilationResult, ArtifactSet)}.
-   */
-  @Override
-  protected String getModulePrefix(TreeLogger logger, LinkerContext context,
-      String strongName) throws UnableToCompleteException {
-    throw new UnableToCompleteException();
-  }
-
-  @Override
-  protected String getSelectionScriptTemplate(TreeLogger logger, LinkerContext context)
-      throws UnableToCompleteException {
-    return "com/google/gwt/core/linker/SingleScriptTemplate.js";
-  }
-}