com.google.gwt.core.linker.CrossSiteIframeLinker Maven / Gradle / Ivy

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/*
 * Copyright 2010 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 com.google.gwt.core.linker;

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.ArtifactSet;
import com.google.gwt.core.ext.linker.CompilationResult;
import com.google.gwt.core.ext.linker.ConfigurationProperty;
import com.google.gwt.core.ext.linker.EmittedArtifact;
import com.google.gwt.core.ext.linker.EmittedArtifact.Visibility;
import com.google.gwt.core.ext.linker.LinkerOrder;
import com.google.gwt.core.ext.linker.LinkerOrder.Order;
import com.google.gwt.core.ext.linker.ScriptReference;
import com.google.gwt.core.ext.linker.Shardable;
import com.google.gwt.core.ext.linker.impl.PropertiesMappingArtifact;
import com.google.gwt.core.ext.linker.impl.PropertiesUtil;
import com.google.gwt.core.ext.linker.impl.ResourceInjectionUtil;
import com.google.gwt.core.ext.linker.impl.SelectionScriptLinker;
import com.google.gwt.dev.About;
import com.google.gwt.dev.util.DefaultTextOutput;
import com.google.gwt.dev.util.TextOutput;
import com.google.gwt.thirdparty.guava.common.base.Joiner;
import com.google.gwt.thirdparty.guava.common.base.Splitter;
import com.google.gwt.util.tools.Utility;
import com.google.gwt.util.tools.shared.StringUtils;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.SortedSet;

/**
 * This linker uses an iframe to hold the code and a script tag to download the
 * code. It can download code cross-site, because it uses a script tag to
 * download it and because it never uses XHR. The iframe, meanwhile, makes it
 * trivial to install additional code as the app runs.
 */
@LinkerOrder(Order.PRIMARY)
@Shardable
public class CrossSiteIframeLinker extends SelectionScriptLinker {
  /**
   * A configuration property that can be used to have the linker ignore the
   * script tags in gwt.xml rather than fail to compile if they are present.
   */
  private static final String FAIL_IF_SCRIPT_TAG_PROPERTY = "xsiframe.failIfScriptTag";

  @Override
  public String getDescription() {
    return "Cross-Site-Iframe";
  }

  @Override
  protected String fillSelectionScriptTemplate(StringBuffer ss, TreeLogger logger,
      LinkerContext context, ArtifactSet artifacts, CompilationResult result)
      throws UnableToCompleteException {

    if (shouldUseSelfForWindowAndDocument(context)) {
      replaceAll(ss, "__WINDOW_DEF__", "self");
      replaceAll(ss, "__DOCUMENT_DEF__", "self");
    } else {
      replaceAll(ss, "__WINDOW_DEF__", "window");
      replaceAll(ss, "__DOCUMENT_DEF__", "document");
    }

    // Must do installScript before waitForBodyLoaded and we must do
    // waitForBodyLoaded before isBodyLoaded
    includeJs(ss, logger, getJsInstallScript(context), "__INSTALL_SCRIPT__");
    includeJs(ss, logger, getJsWaitForBodyLoaded(context), "__WAIT_FOR_BODY_LOADED__");
    includeJs(ss, logger, getJsIsBodyLoaded(context), "__IS_BODY_LOADED__");

    // Must do permutations before providers
    includeJs(ss, logger, getJsPermutations(context), "__PERMUTATIONS__");
    includeJs(ss, logger, getJsProperties(context), "__PROPERTIES__");

    // Order doesn't matter for the rest
    includeJs(ss, logger, getJsProcessMetas(context), "__PROCESS_METAS__");
    includeJs(ss, logger, getJsInstallLocation(context), "__INSTALL_LOCATION__");
    includeJs(ss, logger, getJsComputeScriptBase(context), "__COMPUTE_SCRIPT_BASE__");
    includeJs(ss, logger, getJsComputeUrlForResource(context), "__COMPUTE_URL_FOR_RESOURCE__");
    includeJs(ss, logger, getJsLoadExternalStylesheets(context), "__LOAD_STYLESHEETS__");
    includeJs(ss, logger, getJsRunAsync(context), "__RUN_ASYNC__");
    includeJs(ss, logger, getJsDevModeRedirectHook(context), "__DEV_MODE_REDIRECT_HOOK__");

    // Must go after __DEV_MODE_REDIRECT_HOOK__ because they're found in DevModeRedirectHook.js.
    includeJs(ss, logger, getJsDevModeRedirectHookPermitted(context),
        "__DEV_MODE_REDIRECT_HOOK_PERMITTED__");
    includeJs(ss, logger, getJsDevModeUrlValidation(context), "__DEV_MODE_URL_VALIDATION__");

    // This Linker does not support