/*******************************************************************************
* Copyright (c) 2005, 2006 Intel Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Intel Corporation - initial API and implementation
* IBM Corporation 2006, refactored index view into a single frame
*******************************************************************************/
var oldActive;
var oldActiveClass = "";
/**
* Returns the target node of an event
*/
function getTarget(e) {
var target;
if (isIE) {
target = window.event.srcElement;
} else {
target = e.target;
}
return target;
}
/**
* Returns the next tree node "down" from current one
*/
function getNextDown(node) {
var a = getAnchorNode(node);
if (!a) return null;
// Try visible child first
var li = a.parentNode;
var ul = getChildNode(li, "UL");
if (ul) {
if (ul.className == "expanded") {
return getDescendantNode(ul, "A");
} else {
var ulNext = getNextSibling(ul);
if (ulNext && ulNext.nodeType == 1 && ulNext.tagName == "UL") {
return getDescendantNode(ulNext, "A");
}
}
}
// Try next sibling in current UL
var li_sib = getNextSibling(li);
if (li_sib != null) {
return getDescendantNode(li_sib, "A");
}
// Try child from next UL
var ulNext = getNextSibling(li.parentNode);
if (ulNext && ulNext.nodeType == 1 && ulNext.tagName == "UL") {
return getDescendantNode(ulNext, "A");
}
// Try looking to parent's sibling
while (li_sib == null) {
var ul = li.parentNode;
li = ul.parentNode;
if (li.tagName != "LI") // reached the top, nothing else to do
return null;
li_sib = getNextSibling(li);
}
// found the next down sibling
return getDescendantNode(li_sib, "A");
}
/**
* Returns the next tree node "up" from current one
*/
function getNextUp(node) {
var a = getAnchorNode(node);
if (!a) return null;
// Get previous sibling first
var li = a.parentNode;
var li_sib = getPrevSibling(li);
if (li_sib != null) {
// try to get the deepest node that preceeds this current node
var candidate = getDescendantNode(li_sib, "A");
var nextDown = getNextDown(candidate);
while (nextDown != null && nextDown != node) {
candidate = nextDown;
nextDown = getNextDown(nextDown);
}
return getDescendantNode(candidate, "A");
} else {
// look into previous UL
var ulPrev = getPrevSibling(li.parentNode);
if (ulPrev && ulPrev.nodeType == 1 && ulPrev.tagName == "UL" && ulPrev.className == "expanded") {
var li = getChildNode(ulPrev, "LI");
var candidate = getDescendantNode(li, "A");
var nextDown = getNextDown(candidate);
while (nextDown != null && nextDown != node) {
candidate = nextDown;
nextDown = getNextDown(nextDown);
}
return getDescendantNode(candidate, "A");
} else {
// get the parent
var li = li.parentNode.parentNode;
if (li && li.tagName == "LI")
return getDescendantNode(li, "A");
else
return null;
}
}
}
/**
* Returns the next sibling element
*/
function getNextSibling(node) {
var sib = node.nextSibling;
while (sib && (sib.nodeType == 3 || sib.tagName == "SCRIPT")) // text or script node
sib = sib.nextSibling;
return sib;
}
/**
* Returns the next sibling element
*/
function getPrevSibling(node) {
var sib = node.previousSibling;
while (sib && (sib.nodeType == 3 || sib.tagName == "SCRIPT")) // text or script node
sib = sib.previousSibling;
return sib;
}
/**
* Returns the child node with specified tag
*/
function getChildNode(parent, childTag) {
var list = parent.childNodes;
if (list == null) return null;
for (var i = 0; i < list.length; i++)
if (list.item(i).tagName == childTag)
return list.item(i);
return null;
}
/**
* Returns the descendat node with specified tag (depth-first searches)
*/
function getDescendantNode(parent, childTag) {
if (parent == null) return null;
if (parent.tagName == childTag)
return parent;
var list = parent.childNodes;
if (list == null) return null;
for (var i = 0; i < list.length; i++) {
var child = list.item(i);
if (child.tagName == childTag)
return child;
child = getDescendantNode(child, childTag);
if (child != null)
return child;
}
return null;
}
/**
* Returns the anchor of this click
* NOTE: MOZILLA BUG WITH A:focus and A:active styles
*/
function getAnchorNode(node) {
if (node == null) return null;
if (node.nodeType == 3) //"Node.TEXT_NODE")
return node.parentNode;
else if (node.tagName == "A")
return node;
else if (node.tagName == "IMG")
return getChildNode(node.parentNode, "A");
return null;
}
/**
* Returns true when the node is the plus or minus icon
*/
function isPlusMinus(node) {
return (node.nodeType != 3 && node.tagName == "IMG" && (node.className == "expanded" || node.className == "collapsed"));
}
/**
* Returns the plus/minus icon for this tree node
*/
function getPlusMinus(node) {
if (isPlusMinus(node))
return node;
else if (node.nodeType == 3) //"Node.TEXT_NODE")
return getChildNode(node.parentNode.parentNode, "IMG");
else if (node.tagName == "IMG")
return getChildNode(node.parentNode.parentNode, "IMG");
else if (node.tagName == "A")
return getChildNode(node.parentNode, "IMG");
return null;
}
/**
* Collapses a tree rooted at the specified element
*/
function collapse(node) {
node.className = "collapsed";
node.src = plus.src;
node.alt = altExpandTopicTitles;
node.title = altExpandTopicTitles;
// set the UL as well
var ul = getChildNode(node.parentNode, "UL");
if (ul != null) ul.className = "collapsed";
}
/**
* Expands a tree rooted at the specified element
*/
function expand(node) {
node.className = "expanded";
node.src = minus.src;
node.alt = altCollapseTopicTitles;
node.title = altCollapseTopicTitles;
// set the UL as well
var ul = getChildNode(node.parentNode, "UL");
if (ul != null) {
ul.className = "expanded";
if (ul.id.length > 0) {
if (!frames.dynLoadFrame) {
return;
}
var ix = window.location.href.indexOf('?');
if (ix < 0) {
return;
}
var query = window.location.href.substr(ix);
frames.dynLoadFrame.location = "tocFragment.jsp" + query + "&path=" + ul.id;
}
}
}
/**
* Returns true when this is an expanded tree node
*/
function isExpanded(node) {
return node.className == "expanded";
}
/**
* Returns true when this is a collapsed tree node
*/
function isCollapsed(node) {
return node.className == "collapsed";
}
/**
* Highlights link
*/
function highlightTopic(topic) {
if (isMozilla) {
// try-catch is a workaround for the getSelection() problem
// reported for Safari 2.0.3
try {
window.getSelection().removeAllRanges();
} catch (e) {}
}
var a = getAnchorNode(topic);
if (a != null) {
// TO DO:
// parent.parent.parent.parent.setContentToolbarTitle(tocTitle);
if (oldActive)
oldActive.className = oldActiveClass;
oldActive = a;
oldActiveClass = a.className;
a.className += " active";
// it looks like the onclick event is not handled in mozilla
// *** TO DO: handle failed synchronization, do not select in that case
if (!isIE && a.onclick)
a.onclick()
//if (isIE)
// a.hideFocus = "true";
}
}
/**
* Selects a topic in the tree: expand tree and highlight it
* returns true if success
*/
function selectTopicById(id) {
var topic = document.getElementById(id);
if (topic) {
highlightTopic(topic);
scrollToViewTop(topic);
return true;
}
return false;
}
/**
* Returns the horizontal offset on which the page should be scrolled to show the node.
* Returns 0 if the node is already visible.
*/
function getVerticalScroll(node) {
var nodeTop = node.offsetTop;
var nodeBottom = nodeTop + node.offsetHeight;
var pageTop = 0;
var pageBottom = 0;
if (isIE) {
pageTop = document.body.scrollTop;
pageBottom = pageTop + document.body.clientHeight;
} else {
pageTop = window.pageYOffset;
pageBottom = pageTop + window.innerHeight - node.offsetHeight;
}
var scroll = 0;
if (nodeTop >= pageTop) {
if (nodeBottom <= pageBottom)
scroll = 0; // already in view
else
scroll = nodeBottom - pageBottom;
} else {
scroll = nodeTop - pageTop;
}
return scroll;
}
/**
* Scrolls the page to show the specified element
*/
function scrollIntoView(node) {
var scroll = getVerticalScroll(node);
if (scroll != 0)
window.scrollBy(0, scroll);
}
/**
* Scrolls the page so the node gets to the first line
*/
function scrollToViewTop(node) {
if (node != null) {
window.scrollTo(0, node.offsetTop);
}
}
/*
* Currently called on IE only
*/
function focusHandler(e)
{
/*if (isMozilla)
return;
*/
try{
if (oldActive){
// only focus when the element is visible
var scroll = getVerticalScroll(oldActive);
if (scroll == 0)
oldActive.focus();
}
}
catch(e){}
}
function sizeList() {
resizeVertical("indexList", "typeinTable", null, 100, 5);
}
/**
* display topic label in the status line on mouse over topic
*/
function mouseMoveHandler(e) {
var overNode = getTarget(e);
if (!overNode) return;
overNode = getAnchorNode(overNode);
if (overNode == null) {
window.status = "";
return;
}
if (!isIE)
e.cancelBubble = false;
if (overNode.title == "") {
if (overNode.innerText)
overNode.title = overNode.innerText;
else if (overNode.text)
overNode.title = overNode.text;
}
window.status = overNode.title;
}
/**
* handler for expanding / collapsing topic tree
*/
function mouseClickHandler(e) {
var clickedNode = getTarget(e);
if (!clickedNode) return;
var plus_minus = getPlusMinus(clickedNode);
if (plus_minus != null) {
if (isCollapsed(plus_minus))
expand(plus_minus);
else if (isPlusMinus(clickedNode) && isExpanded(plus_minus))
// collapse only if click on minus image
collapse(plus_minus);
}
var anchorNode = getAnchorNode(clickedNode);
if (anchorNode) {
highlightTopic(anchorNode);
setTypeinValue(anchorNode);
}
if (isIE) {
window.event.cancelBubble = true;
} else {
e.cancelBubble = true;
}
}
/**
* Handler for key down (arrows)
*/
function keyDownHandler(e) {
var key = getKeycode(e);
var target = getEventTarget(e);
if (target === null) return;
if (target.id == "typein") {
return typeinKeyDownHandler(e);
}
if (key <37 || key > 40)
return true;
if (isIE) {
window.event.cancelBubble = true;
} else {
e.cancelBubble = true;
}
if (key == 39) { // Right arrow, expand
var clickedNode = getTarget(e);
if (!clickedNode) return;
var plus_minus = getPlusMinus(clickedNode);
if (plus_minus != null)
{
if (isCollapsed(plus_minus))
expand(plus_minus);
highlightTopic(plus_minus);
scrollIntoView(clickedNode);
}
} else if (key == 37) { // Left arrow,collapse
var clickedNode = getTarget(e);
if (!clickedNode) return;
var plus_minus = getPlusMinus(clickedNode);
if (plus_minus != null) {
if (isExpanded(plus_minus))
collapse(plus_minus);
highlightTopic(plus_minus);
scrollIntoView(clickedNode);
}
} else if (key == 40 ) { // down arrow
var clickedNode = getTarget(e);
if (!clickedNode) return;
var next = getNextDown(clickedNode);
if (next) {
highlightTopic(next);
setTypeinValue(next);
next.focus();
}
} else if (key == 38) { // up arrow
var clickedNode = getTarget(e);
if (!clickedNode) return;
var next = getNextUp(clickedNode);
if (next) {
highlightTopic(next);
setTypeinValue(next);
next.focus();
}
}
return true;
}