Package com.google.caja.demos.playground.client

Source Code of com.google.caja.demos.playground.client.Playground

// Copyright (C) 2009 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.caja.demos.playground.client;

import com.google.caja.demos.playground.client.ui.PlaygroundView;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.core.client.GWT;
import com.google.gwt.event.logical.shared.ValueChangeEvent;
import com.google.gwt.event.logical.shared.ValueChangeHandler;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.Window;
import com.google.gwt.user.client.rpc.AsyncCallback;

/**
* Main entry point for GWT-based Caja playground
*
* @author Jasvir Nagra (jasvir@gmail.com)
*/
public class Playground implements EntryPoint, ValueChangeHandler<String> {
  private PlaygroundView gui;

  private final PlaygroundServiceAsync cajolingService =
    GWT.create(PlaygroundService.class);

  public void loadSource(String url) {
    loadSource(Window.Location.getHref(), url);
  }

  public void loadSource(String base, String url) {
    gui.setLoading(true);
    gui.setUrl(url);
    if (!url.equals(History.getToken())) {
      History.newItem(url);
    }
    cajolingService.fetch(base, url, new AsyncCallback<String>() {
      public void onFailure(Throwable caught) {
        gui.setLoading(false);
        gui.addCompileMessage(caught.getMessage());
        gui.selectTab(PlaygroundView.Tabs.COMPILE_WARNINGS);
      }

      public void onSuccess(String result) {
        gui.setLoading(false);
        gui.setOriginalSource(result);
        gui.setCajoledSource("", "");
        gui.selectTab(PlaygroundView.Tabs.SOURCE);
      }
    });
  }

  public void clearPolicy() {
    gui.setPolicySource("");
  }

  public void loadPolicy(String url) {
    gui.setLoading(true);
    gui.setPolicyUrl(url);
    cajolingService.fetch(Window.Location.getHref(), url,
        new AsyncCallback<String>() {
          public void onFailure(Throwable caught) {
            gui.setLoading(false);
            gui.addCompileMessage(caught.getMessage());
            gui.selectTab(PlaygroundView.Tabs.COMPILE_WARNINGS);
          }

          public void onSuccess(String result) {
            gui.setLoading(false);
            gui.setPolicySource(result);
            gui.selectTab(PlaygroundView.Tabs.POLICY);
          }
        });
  }

  public void cajole(String uri, String input, final String policy,
      boolean debugMode, Boolean es5, final String opt_idClass) {
    if (null == es5 || !es5) {
      cajoleES53(uri, input, policy, debugMode, opt_idClass);
    } else {
      cajoleES5(uri, input, policy, debugMode, opt_idClass);
    }
  }

  /**
   * @param uri not used.
   * @param debugMode not used.
   */
  public void cajoleES5(String uri, String input, final String policy,
      boolean debugMode, final String opt_idClass) {
    gui.setLoading(true);
    gui.setCajoledSource("", "");
    gui.selectTab(PlaygroundView.Tabs.RENDER);
    gui.setRenderedResult(true /* es5 */,
        policy, input, null, opt_idClass);
    gui.setLoading(false);
  }

  public void cajoleES53(String uri, String input, final String policy,
      boolean debugMode, final String opt_idClass) {
    gui.setLoading(true);
    cajolingService.cajole(
        Window.Location.getHref(), uri, input, debugMode, opt_idClass,
        new AsyncCallback<CajolingServiceResult>() {
      public void onFailure(Throwable caught) {
        gui.setLoading(false);
        gui.addCompileMessage(caught.getMessage());
      }

      public void onSuccess(CajolingServiceResult result) {
        gui.setLoading(false);
        if (result == null) {
          gui.addCompileMessage("An unknown error occurred");
          gui.selectTab(PlaygroundView.Tabs.COMPILE_WARNINGS);
          return;
        }
        for (String message: result.getMessages()) {
          gui.addCompileMessage(message);
        }
        if (result.getHtml() != null) {
          gui.setCajoledSource(result.getHtml(), result.getJavascript());
          gui.setRenderedResult(false /* es5 */,
              policy, result.getHtml(), result.getJavascript(), opt_idClass);
          gui.selectTab(PlaygroundView.Tabs.RENDER);
        } else {
          gui.setCajoledSource(null, null);
          gui.setRenderedResult(false, null, null, null, null);
          gui.selectTab(PlaygroundView.Tabs.COMPILE_WARNINGS);
        }
      }
    });
  }

  public void onValueChange(ValueChangeEvent<String> change) {
    String historyToken = change.getValue();
    if (null == historyToken || "".equals(historyToken))
      return;
    loadSource(historyToken);
  }

  public void onModuleLoad() {
    String query = Window.Location.getParameter("es5");
    Boolean mode = null == query ? null :
        query.equalsIgnoreCase("true")
          ? Boolean.TRUE
              : query.equalsIgnoreCase("false")
              ? Boolean.FALSE
                  : null;
    gui = new PlaygroundView(this, mode);
    gui.setLoading(true);
    cajolingService.getBuildInfo(new AsyncCallback<String>() {
      public void onFailure(Throwable caught) {
        gui.setLoading(false);
        gui.addCompileMessage(caught.getMessage());
        gui.setVersion("Unknown");
      }

      public void onSuccess(String result) {
        gui.setLoading(false);
        gui.setVersion(result);
      }
    });
    History.addValueChangeHandler(this);
    History.fireCurrentHistoryState();
  }
}
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