/*
 * Copyright 2000-2009 JetBrains s.r.o.
 *
 * 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.intellij.psi;

import com.intellij.lang.Language;
import com.intellij.openapi.components.ServiceManager;
import com.intellij.openapi.project.Project;
import com.intellij.psi.xml.XmlAttribute;
import com.intellij.psi.xml.XmlTag;
import com.intellij.psi.xml.XmlText;
import com.intellij.util.IncorrectOperationException;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;

/**
 * @author Dmitry Avdeev
 */
public abstract class XmlElementFactory {

  public static XmlElementFactory getInstance(Project project) {
    return ServiceManager.getService(project, XmlElementFactory.class);
  }
  /**
   * Creates an XML text element from the specified string, escaping the special
   * characters in the string as necessary.
   *
   * @param s the text of the element to create.
   * @return the created element.
   * @throws com.intellij.util.IncorrectOperationException if the creation failed for some reason.
   */
  @NotNull
  public abstract XmlText createDisplayText(@NotNull @NonNls String s) throws IncorrectOperationException;

  /**
   * Creates an XHTML tag with the specified text.
   *
   * @param s the text of an XHTML tag (which can contain attributes and subtags).
   * @return the created tag instance.
   * @throws IncorrectOperationException if the text does not specify a valid XML fragment.
   */
  @NotNull
  public abstract XmlTag createXHTMLTagFromText(@NotNull @NonNls String s) throws IncorrectOperationException;

  /**
   * Creates an HTML tag with the specified text.
   *
   * @param s the text of an HTML tag (which can contain attributes and subtags).
   * @return the created tag instance.
   * @throws IncorrectOperationException if the text does not specify a valid XML fragment.
   */
  @NotNull
  public abstract XmlTag createHTMLTagFromText(@NotNull @NonNls String s) throws IncorrectOperationException;

  /**
   * Creates an XML tag with the specified text.
   *
   * @param text the text of an XML tag (which can contain attributes and subtags).
   * @return the created tag instance.
   * @throws com.intellij.util.IncorrectOperationException if the text does not specify a valid XML fragment.
   * @see #createTagFromText(CharSequence text, Language language)
   */
  @NotNull
  public abstract XmlTag createTagFromText(@NotNull @NonNls CharSequence text) throws IncorrectOperationException;

  /**
   * Creates XML like tag with the specified text and language.
   *
   * @param text the text of an XML tag (which can contain attributes and subtags).
   * @param language the language for tag to be created.
   * @return the created tag instance.
   * @throws com.intellij.util.IncorrectOperationException if the text does not specify a valid XML fragment.
   * @see #createTagFromText(CharSequence)
   */
  @NotNull
  public abstract XmlTag createTagFromText(@NotNull @NonNls CharSequence text, @NotNull Language language) throws IncorrectOperationException;

  /**
   * Creates an XML attribute with the specified name and value.
   *
   * @param name  the name of the attribute to create.
   * @param value the value of the attribute to create.
   * @return the created attribute instance.
   * @throws IncorrectOperationException if either <code>name</code> or <code>value</code> are not valid.
   */
  @NotNull
  public abstract XmlAttribute createXmlAttribute(@NotNull @NonNls String name, @NotNull String value) throws IncorrectOperationException;
}