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A headless browser intended for use in testing web-based applications.
/*
* Copyright (c) 2002-2022 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
* https://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.dom;
import static com.gargoylesoftware.htmlunit.javascript.configuration.SupportedBrowser.IE;
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.HtmlUnitScriptable;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxClass;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxFunction;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxGetter;
import com.gargoylesoftware.htmlunit.javascript.configuration.JsxSetter;
import com.gargoylesoftware.htmlunit.javascript.host.Element;
import com.gargoylesoftware.htmlunit.javascript.host.Window;
import com.gargoylesoftware.htmlunit.javascript.host.html.HTMLElement;
import net.sourceforge.htmlunit.corejs.javascript.Context;
import net.sourceforge.htmlunit.corejs.javascript.Undefined;
/**
* A JavaScript object for {@code TextRange} (IE only).
*
* @see MSDN documentation (1)
* @see MSDN documentation (2)
* @author Ahmed Ashour
* @author Marc Guillemot
* @author David Gileadi
*/
@JsxClass(IE)
public class TextRange extends HtmlUnitScriptable {
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 Element 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
*/
@JsxGetter
public String getText() {
return range_.toString();
}
/**
* Sets the text contained within the range.
* @param text the text contained within the range
*/
@JsxSetter
public void setText(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
*/
@JsxGetter
public String getHtmlText() {
final org.w3c.dom.Node node = range_.getCommonAncestorContainer();
if (null == node) {
return "";
}
final HTMLElement element = (HTMLElement) getScriptableFor(node);
return element.getOuterHTML(); // TODO: not quite right, but good enough for now
}
/**
* Duplicates this TextRange instance.
* @see MSDN documentation
* @return a duplicate of this TextRange instance
*/
@JsxFunction
public Object 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 MSDN doc
* @return the parent element object if successful, or null otherwise.
*/
@JsxFunction
public Node parentElement() {
final org.w3c.dom.Node parent = range_.getCommonAncestorContainer();
if (null == parent) {
if (null == range_.getStartContainer() || null == range_.getEndContainer()) {
try {
final Window window = (Window) getParentScope();
final HtmlPage page = (HtmlPage) window.getDomNodeOrDie();
return (Node) getScriptableFor(page.getBody());
}
catch (final Exception e) {
// ok bad luck
}
}
return null;
}
return (Node) getScriptableFor(parent);
}
/**
* Collapses the range.
* @param toStart indicates if collapse should be done to the start
* @see MSDN doc
*/
@JsxFunction
public void collapse(final boolean toStart) {
range_.collapse(toStart);
}
/**
* Makes the current range the active selection.
*
* @see MSDN doc
*/
@JsxFunction
public void 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
*/
@JsxFunction
public int moveStart(final String unit, final Object count) {
if (!"character".equals(unit)) {
if (LOG.isWarnEnabled()) {
LOG.warn("moveStart('" + unit + "') is not yet supported");
}
return 0;
}
int c = 1;
if (!Undefined.isUndefined(count)) {
c = (int) Context.toNumber(count);
}
if (range_.getStartContainer() == range_.getEndContainer()
&& range_.getStartContainer() instanceof SelectableTextInput) {
final SelectableTextInput input = (SelectableTextInput) range_.getStartContainer();
c = constrainMoveBy(c, range_.getStartOffset(), input.getText().length());
range_.setStart(input, range_.getStartOffset() + c);
}
return c;
}
/**
* Collapses the given text range and moves the empty range by the given number of units.
* @param unit specifies the units to move
* @param count the number of units to move
* @return the number of units moved
*/
@JsxFunction
public int move(final String unit, final Object count) {
collapse(true);
return moveStart(unit, count);
}
/**
* 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
*/
@JsxFunction
public int moveEnd(final String unit, final Object count) {
if (!"character".equals(unit)) {
if (LOG.isWarnEnabled()) {
LOG.warn("moveEnd('" + unit + "') is not yet supported");
}
return 0;
}
int c = 1;
if (!Undefined.isUndefined(count)) {
c = (int) Context.toNumber(count);
}
if (range_.getStartContainer() == range_.getEndContainer()
&& range_.getStartContainer() instanceof SelectableTextInput) {
final SelectableTextInput input = (SelectableTextInput) range_.getStartContainer();
c = constrainMoveBy(c, range_.getEndOffset(), input.getText().length());
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 MSDN Documentation
*/
@JsxFunction
public void 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} if other is contained within current range
* @see MSDN doc
*/
@JsxFunction
public boolean inRange(final TextRange other) {
final Range otherRange = other.range_;
final org.w3c.dom.Node otherStart = otherRange.getStartContainer();
if (otherStart == null) {
return false;
}
final org.w3c.dom.Node start = range_.getStartContainer();
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;
}
/**
* Sets the endpoint of the range based on the endpoint of another range..
* @param type end point transfer type. One of "StartToEnd", "StartToStart", "EndToStart" and "EndToEnd"
* @param other the other range
* @see MSDN doc
*/
@JsxFunction
public void setEndPoint(final String type, final TextRange other) {
final Range otherRange = other.range_;
final org.w3c.dom.Node target;
final int offset;
if (type.endsWith("ToStart")) {
target = otherRange.getStartContainer();
offset = otherRange.getStartOffset();
}
else {
target = otherRange.getEndContainer();
offset = otherRange.getEndOffset();
}
if (type.startsWith("Start")) {
range_.setStart(target, offset);
}
else {
range_.setEnd(target, offset);
}
}
/**
* Constrain the given amount to move the range by to the limits of the given current offset and text length.
* @param moveBy the amount to move by
* @param current the current index
* @param textLength the text length
* @return the moveBy amount constrained to the text length
*/
private static int constrainMoveBy(final int moveBy, final int current, final int textLength) {
final int to = current + moveBy;
if (to < 0) {
return moveBy - to;
}
if (to >= textLength) {
return moveBy - (to - textLength);
}
return moveBy;
}
/**
* Retrieves a bookmark (opaque string) that can be used with {@link #moveToBookmark}
* to return to the same range.
* The current implementation return empty string
* @return the bookmark
*/
@JsxFunction
public String getBookmark() {
return "";
}
/**
* Moves to a bookmark.
* The current implementation does nothing
* @param bookmark the bookmark
* @return {@code false}
*/
@JsxFunction
public boolean moveToBookmark(final String bookmark) {
return false;
}
/**
* Compares an end point of a TextRange object with an end point of another range.
* @param how how to compare
* @param sourceRange the other range
* @return the result
*/
@JsxFunction
public int compareEndPoints(final String how, final TextRange sourceRange) {
final org.w3c.dom.Node start;
final org.w3c.dom.Node otherStart;
switch (how) {
case "StartToEnd":
start = range_.getStartContainer();
otherStart = sourceRange.range_.getEndContainer();
break;
case "StartToStart":
start = range_.getStartContainer();
otherStart = sourceRange.range_.getStartContainer();
break;
case "EndToStart":
start = range_.getEndContainer();
otherStart = sourceRange.range_.getStartContainer();
break;
default:
start = range_.getEndContainer();
otherStart = sourceRange.range_.getEndContainer();
break;
}
if (start == null || otherStart == null) {
return 0;
}
return start.compareDocumentPosition(otherStart);
}
}
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