/*
* Copyright (c) 2002-2010 Gargoyle Software 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.gargoylesoftware.htmlunit.javascript.host;
import net.sourceforge.htmlunit.corejs.javascript.Context;
import net.sourceforge.htmlunit.corejs.javascript.Undefined;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.ranges.Range;
import com.gargoylesoftware.htmlunit.html.HtmlPage;
import com.gargoylesoftware.htmlunit.html.impl.SelectableTextInput;
import com.gargoylesoftware.htmlunit.html.impl.SimpleRange;
import com.gargoylesoftware.htmlunit.javascript.SimpleScriptable;
import com.gargoylesoftware.htmlunit.javascript.host.html.HTMLElement;
/**
* A JavaScript object for a TextRange (IE only).
*
* @see <a href="http://msdn2.microsoft.com/en-us/library/ms535872.aspx">MSDN documentation (1)</a>
* @see <a href="http://msdn2.microsoft.com/en-us/library/ms533042.aspx">MSDN documentation (2)</a>
* @version $Revision: 5301 $
* @author Ahmed Ashour
* @author Marc Guillemot
*/
public class TextRange extends SimpleScriptable {
private static final long serialVersionUID = -3763822832184277966L;
private static final Log LOG = LogFactory.getLog(TextRange.class);
/** The wrapped selection range. */
private Range range_;
/**
* Default constructor used to build the prototype.
*/
public TextRange() {
// Empty.
}
/**
* Constructs a text range around the provided element.
* @param elt the element to wrap
*/
public TextRange(final HTMLElement elt) {
range_ = new SimpleRange(elt.getDomNodeOrDie());
}
/**
* Constructs a text range around the provided range.
* @param range the initial range
*/
public TextRange(final Range range) {
range_ = range.cloneRange();
}
/**
* Retrieves the text contained within the range.
* @return the text contained within the range
*/
public String jsxGet_text() {
return range_.toString();
}
/**
* Sets the text contained within the range.
* @param text the text contained within the range
*/
public void jsxSet_text(final String text) {
if (range_.getStartContainer() == range_.getEndContainer()
&& range_.getStartContainer() instanceof SelectableTextInput) {
final SelectableTextInput input = (SelectableTextInput) range_.getStartContainer();
final String oldValue = input.getText();
input.setText(oldValue.substring(0, input.getSelectionStart()) + text
+ oldValue.substring(input.getSelectionEnd()));
}
}
/**
* Retrieves the HTML fragment contained within the range.
* @return the HTML fragment contained within the range
*/
public String jsxGet_htmlText() {
final org.w3c.dom.Node node = range_.getCommonAncestorContainer();
final HTMLElement element = (HTMLElement) getScriptableFor(node);
return element.jsxGet_outerHTML(); // TODO: not quite right, but good enough for now
}
/**
* Duplicates this TextRange instance.
* @see <a href="http://msdn.microsoft.com/en-us/library/ms536416.aspx">MSDN documentation</a>
* @return a duplicate of this TextRange instance
*/
public Object jsxFunction_duplicate() {
final TextRange range = new TextRange(range_.cloneRange());
range.setParentScope(getParentScope());
range.setPrototype(getPrototype());
return range;
}
/**
* Retrieves the parent element for the given text range.
* The parent element is the element that completely encloses the text in the range.
* If the text range spans text in more than one element, this method returns the smallest element that encloses
* all the elements. When you insert text into a range that spans multiple elements, the text is placed in the
* parent element rather than in any of the contained elements.
*
* @see <a href="http://msdn.microsoft.com/en-us/library/ms536654.aspx">MSDN doc</a>
* @return the parent element object if successful, or null otherwise.
*/
public Object jsxFunction_parentElement() {
final org.w3c.dom.Node parent = range_.getCommonAncestorContainer();
return getScriptableFor(parent);
}
/**
* Collapses the range.
* @param toStart indicates if collapse should be done to the start
* @see <a href="http://msdn.microsoft.com/en-us/library/ms536371.aspx">MSDN doc</a>
*/
public void jsxFunction_collapse(final boolean toStart) {
range_.collapse(toStart);
}
/**
* Makes the current range the active selection.
*
* @see <a href="http://msdn.microsoft.com/en-us/library/ms536735.aspx">MSDN doc</a>
*/
public void jsxFunction_select() {
final HtmlPage page = (HtmlPage) getWindow().getDomNodeOrDie();
page.setSelectionRange(range_);
}
/**
* Changes the start position of the range.
* @param unit specifies the units to move
* @param count the number of units to move
* @return the number of units moved
*/
public int jsxFunction_moveStart(final String unit, final Object count) {
if (!"character".equals(unit)) {
LOG.warn("moveStart('" + unit + "') is not yet supported");
return 0;
}
int c = 1;
if (count != Undefined.instance) {
c = (int) Context.toNumber(count);
}
if (range_.getStartContainer() == range_.getEndContainer()
&& range_.getStartContainer() instanceof SelectableTextInput) {
final SelectableTextInput input = (SelectableTextInput) range_.getStartContainer();
range_.setStart(input, range_.getStartOffset() + c);
}
return c;
}
/**
* Changes the end position of the range.
* @param unit specifies the units to move
* @param count the number of units to move
* @return the number of units moved
*/
public int jsxFunction_moveEnd(final String unit, final Object count) {
if (!"character".equals(unit)) {
LOG.warn("moveEnd('" + unit + "') is not yet supported");
return 0;
}
int c = 1;
if (count != Undefined.instance) {
c = (int) Context.toNumber(count);
}
if (range_.getStartContainer() == range_.getEndContainer()
&& range_.getStartContainer() instanceof SelectableTextInput) {
final SelectableTextInput input = (SelectableTextInput) range_.getStartContainer();
range_.setEnd(input, range_.getEndOffset() + c);
}
return c;
}
/**
* Moves the text range so that the start and end positions of the range encompass
* the text in the specified element.
* @param element the element to move to
* @see <a href="http://msdn.microsoft.com/en-us/library/ms536630.aspx">MSDN Documentation</a>
*/
public void jsxFunction_moveToElementText(final HTMLElement element) {
range_.selectNode(element.getDomNodeOrDie());
}
/**
* Indicates if a range is contained in current one.
* @param other the other range
* @return <code>true</code> if <code>other</code> is contained within current range
* @see <a href="http://msdn.microsoft.com/en-us/library/ms536371.aspx">MSDN doc</a>
*/
public boolean jsxFunction_inRange(final TextRange other) {
final Range otherRange = other.range_;
final org.w3c.dom.Node start = range_.getStartContainer();
final org.w3c.dom.Node otherStart = otherRange.getStartContainer();
if (otherStart == null) {
return false;
}
final short startComparison = start.compareDocumentPosition(otherStart);
final boolean startNodeBefore = startComparison == 0
|| (startComparison & Node.DOCUMENT_POSITION_CONTAINS) != 0
|| (startComparison & Node.DOCUMENT_POSITION_PRECEDING) != 0;
if (startNodeBefore && (start != otherStart || range_.getStartOffset() <= otherRange.getStartOffset())) {
final org.w3c.dom.Node end = range_.getEndContainer();
final org.w3c.dom.Node otherEnd = otherRange.getEndContainer();
final short endComparison = end.compareDocumentPosition(otherEnd);
final boolean endNodeAfter = endComparison == 0
|| (endComparison & Node.DOCUMENT_POSITION_CONTAINS) != 0
|| (endComparison & Node.DOCUMENT_POSITION_FOLLOWING) != 0;
if (endNodeAfter && (end != otherEnd || range_.getEndOffset() >= otherRange.getEndOffset())) {
return true;
}
}
return false;
}
}