/*
 * Copyright (c) 2000 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program is distributed in the
 * hope that it will be useful, but WITHOUT ANY WARRANTY; without even
 * the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE.
 * See W3C License http://www.w3.org/Consortium/Legal/ for more details.
 */

package org.w3c.dom.ranges;

import org.w3c.dom.Node;
import org.w3c.dom.DocumentFragment;
import org.w3c.dom.DOMException;

/**
 * <p>See also the <a href='http://www.w3.org/TR/2000/REC-DOM-Level-2-Traversal-Range-20001113'>Document Object Model (DOM) Level 2 Traversal and Range Specification</a>.
 * @since DOM Level 2
 */
public interface Range {
    /**
     * Node within which the Range begins 
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public Node getStartContainer()
                       throws DOMException;

    /**
     * Offset within the starting node of the Range. 
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public int getStartOffset()
                       throws DOMException;

    /**
     * Node within which the Range ends 
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public Node getEndContainer()
                       throws DOMException;

    /**
     * Offset within the ending node of the Range. 
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public int getEndOffset()
                       throws DOMException;

    /**
     * TRUE if the Range is collapsed 
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public boolean getCollapsed()
                       throws DOMException;

    /**
     * The deepest common ancestor container of the Range's two 
     * boundary-points.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public Node getCommonAncestorContainer()
                       throws DOMException;

    /**
     * Sets the attributes describing the start of the Range. 
     * @param refNodeThe <code>refNode</code> value. This parameter must be 
     *   different from <code>null</code>.
     * @param offsetThe <code>startOffset</code> value. 
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if <code>refNode</code> or an ancestor 
     *   of <code>refNode</code> is an Entity, Notation, or DocumentType 
     *   node.
     * @exception DOMException
     *   INDEX_SIZE_ERR: Raised if <code>offset</code> is negative or greater 
     *   than the number of child units in <code>refNode</code>. Child units 
     *   are 16-bit units if <code>refNode</code> is a type of CharacterData 
     *   node (e.g., a Text or Comment node) or a ProcessingInstruction 
     *   node. Child units are Nodes in all other cases.
     *   <br>INVALID_STATE_ERR: Raised if <code>detach()</code> has already 
     *   been invoked on this object.
     */
    public void setStart(Node refNode, 
                         int offset)
                         throws RangeException, DOMException;

    /**
     * Sets the attributes describing the end of a Range.
     * @param refNodeThe <code>refNode</code> value. This parameter must be 
     *   different from <code>null</code>.
     * @param offsetThe <code>endOffset</code> value. 
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if <code>refNode</code> or an ancestor 
     *   of <code>refNode</code> is an Entity, Notation, or DocumentType 
     *   node.
     * @exception DOMException
     *   INDEX_SIZE_ERR: Raised if <code>offset</code> is negative or greater 
     *   than the number of child units in <code>refNode</code>. Child units 
     *   are 16-bit units if <code>refNode</code> is a type of CharacterData 
     *   node (e.g., a Text or Comment node) or a ProcessingInstruction 
     *   node. Child units are Nodes in all other cases.
     *   <br>INVALID_STATE_ERR: Raised if <code>detach()</code> has already 
     *   been invoked on this object.
     */
    public void setEnd(Node refNode, 
                       int offset)
                       throws RangeException, DOMException;

    /**
     * Sets the start position to be before a node
     * @param refNodeRange starts before <code>refNode</code> 
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if the root container of 
     *   <code>refNode</code> is not an Attr, Document, or DocumentFragment 
     *   node or if <code>refNode</code> is a Document, DocumentFragment, 
     *   Attr, Entity, or Notation node.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public void setStartBefore(Node refNode)
                               throws RangeException, DOMException;

    /**
     * Sets the start position to be after a node
     * @param refNodeRange starts after <code>refNode</code> 
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if the root container of 
     *   <code>refNode</code> is not an Attr, Document, or DocumentFragment 
     *   node or if <code>refNode</code> is a Document, DocumentFragment, 
     *   Attr, Entity, or Notation node.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public void setStartAfter(Node refNode)
                              throws RangeException, DOMException;

    /**
     * Sets the end position to be before a node. 
     * @param refNodeRange ends before <code>refNode</code> 
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if the root container of 
     *   <code>refNode</code> is not an Attr, Document, or DocumentFragment 
     *   node or if <code>refNode</code> is a Document, DocumentFragment, 
     *   Attr, Entity, or Notation node.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public void setEndBefore(Node refNode)
                             throws RangeException, DOMException;

    /**
     * Sets the end of a Range to be after a node 
     * @param refNodeRange ends after <code>refNode</code>. 
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if the root container of 
     *   <code>refNode</code> is not an Attr, Document or DocumentFragment 
     *   node or if <code>refNode</code> is a Document, DocumentFragment, 
     *   Attr, Entity, or Notation node.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public void setEndAfter(Node refNode)
                            throws RangeException, DOMException;

    /**
     * Collapse a Range onto one of its boundary-points 
     * @param toStartIf TRUE, collapses the Range onto its start; if FALSE, 
     *   collapses it onto its end. 
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public void collapse(boolean toStart)
                         throws DOMException;

    /**
     * Select a node and its contents 
     * @param refNodeThe node to select. 
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if an ancestor of <code>refNode</code> 
     *   is an Entity, Notation or DocumentType node or if 
     *   <code>refNode</code> is a Document, DocumentFragment, Attr, Entity, 
     *   or Notation node.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public void selectNode(Node refNode)
                           throws RangeException, DOMException;

    /**
     * Select the contents within a node 
     * @param refNodeNode to select from 
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if <code>refNode</code> or an ancestor 
     *   of <code>refNode</code> is an Entity, Notation or DocumentType node.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public void selectNodeContents(Node refNode)
                                   throws RangeException, DOMException;

    // CompareHow
    /**
     * Compare start boundary-point of <code>sourceRange</code> to start 
     * boundary-point of Range on which <code>compareBoundaryPoints</code> 
     * is invoked.
     */
    public static final short START_TO_START            = 0;
    /**
     * Compare start boundary-point of <code>sourceRange</code> to end 
     * boundary-point of Range on which <code>compareBoundaryPoints</code> 
     * is invoked.
     */
    public static final short START_TO_END              = 1;
    /**
     * Compare end boundary-point of <code>sourceRange</code> to end 
     * boundary-point of Range on which <code>compareBoundaryPoints</code> 
     * is invoked.
     */
    public static final short END_TO_END                = 2;
    /**
     * Compare end boundary-point of <code>sourceRange</code> to start 
     * boundary-point of Range on which <code>compareBoundaryPoints</code> 
     * is invoked.
     */
    public static final short END_TO_START              = 3;

    /**
     * Compare the boundary-points of two Ranges in a document.
     * @param howA code representing the type of comparison, as defined above.
     * @param sourceRangeThe <code>Range</code> on which this current 
     *   <code>Range</code> is compared to.
     * @return  -1, 0 or 1 depending on whether the corresponding 
     *   boundary-point of the Range is respectively before, equal to, or 
     *   after the corresponding boundary-point of <code>sourceRange</code>. 
     * @exception DOMException
     *   WRONG_DOCUMENT_ERR: Raised if the two Ranges are not in the same 
     *   Document or DocumentFragment.
     *   <br>INVALID_STATE_ERR: Raised if <code>detach()</code> has already 
     *   been invoked on this object.
     */
    public short compareBoundaryPoints(short how, 
                                       Range sourceRange)
                                       throws DOMException;

    /**
     * Removes the contents of a Range from the containing document or 
     * document fragment without returning a reference to the removed 
     * content.  
     * @exception DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised if any portion of the content of 
     *   the Range is read-only or any of the nodes that contain any of the 
     *   content of the Range are read-only.
     *   <br>INVALID_STATE_ERR: Raised if <code>detach()</code> has already 
     *   been invoked on this object.
     */
    public void deleteContents()
                               throws DOMException;

    /**
     * Moves the contents of a Range from the containing document or document 
     * fragment to a new DocumentFragment. 
     * @return A DocumentFragment containing the extracted contents. 
     * @exception DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised if any portion of the content of 
     *   the Range is read-only or any of the nodes which contain any of the 
     *   content of the Range are read-only.
     *   <br>HIERARCHY_REQUEST_ERR: Raised if a DocumentType node would be 
     *   extracted into the new DocumentFragment.
     *   <br>INVALID_STATE_ERR: Raised if <code>detach()</code> has already 
     *   been invoked on this object.
     */
    public DocumentFragment extractContents()
                                            throws DOMException;

    /**
     * Duplicates the contents of a Range 
     * @return A DocumentFragment that contains content equivalent to this 
     *   Range.
     * @exception DOMException
     *   HIERARCHY_REQUEST_ERR: Raised if a DocumentType node would be 
     *   extracted into the new DocumentFragment.
     *   <br>INVALID_STATE_ERR: Raised if <code>detach()</code> has already 
     *   been invoked on this object.
     */
    public DocumentFragment cloneContents()
                                          throws DOMException;

    /**
     * Inserts a node into the Document or DocumentFragment at the start of 
     * the Range. If the container is a Text node, this will be split at the 
     * start of the Range (as if the Text node's splitText method was 
     * performed at the insertion point) and the insertion will occur 
     * between the two resulting Text nodes. Adjacent Text nodes will not be 
     * automatically merged. If the node to be inserted is a 
     * DocumentFragment node, the children will be inserted rather than the 
     * DocumentFragment node itself.
     * @param newNodeThe node to insert at the start of the Range 
     * @exception DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised if an ancestor container of the 
     *   start of the Range is read-only.
     *   <br>WRONG_DOCUMENT_ERR: Raised if <code>newNode</code> and the 
     *   container of the start of the Range were not created from the same 
     *   document.
     *   <br>HIERARCHY_REQUEST_ERR: Raised if the container of the start of 
     *   the Range is of a type that does not allow children of the type of 
     *   <code>newNode</code> or if <code>newNode</code> is an ancestor of 
     *   the container.
     *   <br>INVALID_STATE_ERR: Raised if <code>detach()</code> has already 
     *   been invoked on this object.
     * @exception RangeException
     *   INVALID_NODE_TYPE_ERR: Raised if <code>newNode</code> is an Attr, 
     *   Entity, Notation, or Document node.
     */
    public void insertNode(Node newNode)
                           throws DOMException, RangeException;

    /**
     * Reparents the contents of the Range to the given node and inserts the 
     * node at the position of the start of the Range. 
     * @param newParentThe node to surround the contents with. 
     * @exception DOMException
     *   NO_MODIFICATION_ALLOWED_ERR: Raised if an ancestor container of 
     *   either boundary-point of the Range is read-only.
     *   <br>WRONG_DOCUMENT_ERR: Raised if <code> newParent</code> and the 
     *   container of the start of the Range were not created from the same 
     *   document.
     *   <br>HIERARCHY_REQUEST_ERR: Raised if the container of the start of 
     *   the Range is of a type that does not allow children of the type of 
     *   <code>newParent</code> or if <code>newParent</code> is an ancestor 
     *   of the container or if <code>node</code> would end up with a child 
     *   node of a type not allowed by the type of <code>node</code>.
     *   <br>INVALID_STATE_ERR: Raised if <code>detach()</code> has already 
     *   been invoked on this object.
     * @exception RangeException
     *   BAD_BOUNDARYPOINTS_ERR: Raised if the Range partially selects a 
     *   non-text node.
     *   <br>INVALID_NODE_TYPE_ERR: Raised if <code> node</code> is an Attr, 
     *   Entity, DocumentType, Notation, Document, or DocumentFragment node.
     */
    public void surroundContents(Node newParent)
                                 throws DOMException, RangeException;

    /**
     * Produces a new Range whose boundary-points are equal to the 
     * boundary-points of the Range. 
     * @return The duplicated Range. 
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public Range cloneRange()
                            throws DOMException;

    /**
     * Returns the contents of a Range as a string. This string contains only 
     * the data characters, not any markup. 
     * @return The contents of the Range.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public String toString()
                           throws DOMException;

    /**
     * Called to indicate that the Range is no longer in use and that the 
     * implementation may relinquish any resources associated with this 
     * Range. Subsequent calls to any methods or attribute getters on this 
     * Range will result in a <code>DOMException</code> being thrown with an 
     * error code of <code>INVALID_STATE_ERR</code>.
     * @exception DOMException
     *   INVALID_STATE_ERR: Raised if <code>detach()</code> has already been 
     *   invoked on this object.
     */
    public void detach()
                       throws DOMException;

}