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/*
 * Copyright 2011 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.uibinder.rebind.model;

import com.google.gwt.uibinder.rebind.FieldManager;
import com.google.gwt.uibinder.rebind.IndentedWriter;
import com.google.gwt.uibinder.rebind.MortalLogger;
import com.google.gwt.uibinder.rebind.Tokenator;

import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

/**
 * Model class for SafeHtml templates used in generated UiBinder rendering
 * implementation.
 */

public class HtmlTemplatesWriter {
  private final List htmlTemplates = new ArrayList();
  private final Set safeConstantExpressions = new HashSet();
  private final Set uriExpressions = new HashSet();
  private final FieldManager fieldManager;
  private final MortalLogger logger;

  public HtmlTemplatesWriter(FieldManager fieldManager, MortalLogger logger) {
    this.fieldManager = fieldManager;
    this.logger = logger;
  }

  /**
   * Add a SafeHtml template and an instance method for invoking the template to
   * the generated BinderImpl class. These templates are declared at the
   * beginning of the class and instantiated with a GWT.create(Template.class
   * call.
   * 

* Note that the UiBinder#tokenator is used to determine the arguments to the * generated SafeHtml template. * * @return the object that models this template method */ public HtmlTemplateMethodWriter addSafeHtmlTemplate(String html, Tokenator t) throws IllegalArgumentException { if (html == null) { throw new IllegalArgumentException("Template html cannot be null"); } if (t == null) { throw new IllegalArgumentException("Template tokenator cannot be null"); } HtmlTemplateMethodWriter method = new HtmlTemplateMethodWriter(html, t, this); htmlTemplates.add(method); return method; } public int getNumTemplates() { return htmlTemplates.size(); } public List getTemplates() { return htmlTemplates; } public boolean isEmpty() { return htmlTemplates.isEmpty(); } public boolean isSafeConstant(String expression) { return safeConstantExpressions.contains(expression); } public boolean isUri(String expression) { return uriExpressions.contains(expression); } public void noteSafeConstant(String expression) { safeConstantExpressions.add(expression); } public void noteUri(String expression) { uriExpressions.add(expression); } /** * Write the SafeHtmlTemplates interface and its GWT.create() call. */ public void writeInterface(IndentedWriter w) { w.write("interface Template extends SafeHtmlTemplates {"); w.indent(); for (HtmlTemplateMethodWriter t : htmlTemplates) { t.writeTemplateMethod(w); } w.outdent(); w.write("}"); w.newline(); w.write("Template template = GWT.create(Template.class);"); } /** * Write the no-arg methods that that call each template method. These are * called from HTMLPanelParser constructors and such. */ public void writeTemplateCallers(IndentedWriter w) { for (HtmlTemplateMethodWriter t1 : htmlTemplates) { t1.writeTemplateCaller(w); } } FieldManager getFieldManager() { return fieldManager; } MortalLogger getLogger() { return logger; } /** * Increment the total number of templates. */ int nextTemplateId() { return htmlTemplates.size() + 1; } }





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