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-rwxr-xr-xwebdoc/ptree/tree.js466
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diff --git a/webdoc/ptree/tree.js b/webdoc/ptree/tree.js
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-//
-// PTree - A dynamically loaded TOC tree
-//
-// Author:
-// Piers Haken (piersh@friskit.com)
-//
-// (C) 2003 Piers Haken
-//
-
-// TODO:
-// work out how to cancel scrolling keyboard events on Mozilla
-// better support for multiple trees in a single body
-
-function PTree ()
-{
- this.strActionBase = "";
- this.strSrcBase = "";
- this.strTargetDefault = "";
- this.strImagesBase = "images/";
- this.strImageExt = ".png";
- this.eltSelected = null;
- this.nImageWidth = 18;
- this.nImageHeight = 18;
- this.onClickCallback = null;
-
- this.CreateItemFromXML = function (oNode, fLast, eltParent)
- {
- var strText = oNode.getAttribute ("text");
- var strAction = oNode.getAttribute ("action");
- var strSrc = oNode.getAttribute ("src");
- var strTarget = oNode.getAttribute ("target");
- return this.CreateItem (eltParent, strText, strAction, strSrc, fLast, strTarget, fLast, eltParent);
- }
-
- this.CreateItem = function (eltParent, strText, strAction, strSrc, fLast, strTarget)
- {
- var _this = this;
-
- var eltDiv = document.createElement ("DIV");
- if (eltParent == null)
- eltDiv.tree_fRoot = true;
-
- if (fLast)
- eltDiv.tree_fLast = true;
-
- if (strAction)
- eltDiv.tree_action = strAction;
-
- if (strSrc != null)
- eltDiv.tree_src = strSrc;
-
- var eltSpan = document.createElement ("SPAN");
- eltSpan.className = "tree-label";
-
- if (eltParent)
- {
- eltDiv.className = "tree-node-collapsed";
-
- // this node's tree icon
- var eltIcon = new Image ();
- eltIcon.width = this.nImageWidth;
- eltIcon.height = this.nImageHeight;
- if (strSrc)
- eltIcon.onclick = function () { _this.LoadNode (this); }
- eltIcon.src = this.GetIconSrc (eltDiv, true);
- eltSpan.appendChild (eltIcon);
-
- // parent's tree icons
- var eltIconLast = eltIcon;
- var eltParentDiv = eltParent;
- while (!this.IsRootDiv (eltParentDiv))
- {
- var eltIcon = new Image ();
- eltIcon.width = this.nImageWidth;
- eltIcon.height = this.nImageHeight;
- if (this.IsLastDiv (eltParentDiv))
- eltIcon.src = this.strImagesBase + "blank" + this.strImageExt;
- else
- eltIcon.src = this.strImagesBase + "I" + this.strImageExt;
-
- eltSpan.insertBefore (eltIcon, eltIconLast);
- eltIconLast = eltIcon;
- eltParentDiv = this.GetParentDiv (eltParentDiv);
- }
- }
- else
- {
- eltDiv.className = "tree-node";
- //document.body.onkeydown = function () { return _this.onKeyDown (); }
- }
-
- // description
- var eltText = document.createTextNode (strText);
- var eltDescription;
-
- if (strAction)
- {
- eltDescription = document.createElement ("a");
- if (strAction.indexOf ('http://') === 0)
- eltDescription.href = strAction;
- else
- eltDescription.href = this.strActionBase + strAction;
- eltDescription.title = strText;
- if (strTarget)
- eltDescription.target = strTarget;
- else if (this.strTargetDefault)
- eltDescription.target = this.strTargetDefault;
- eltDescription.appendChild (eltText);
- var parent = this;
- eltDescription.onclick = function (e) {
- if (!e)
- e = window.event;
- if (e.ctrlKey || e.shiftKey || e.altKey || e.metaKey || e.modifiers > 0)
- return;
- _this.SelectNode (eltDiv);
- if (parent.onClickCallback) {
- e.cancelBubble = true;
- e.returnValue = false;
- if (e.stopPropagation) {
- e.stopPropagation ();
- e.preventDefault ();
- }
- parent.onClickCallback(strAction);
- }
- }
- eltDescription.onmouseover = function () { this.blur (); }
- eltDescription.onmouseup = function () { this.blur (); }
- }
- else
- {
- eltDescription = document.createElement ("span");
- eltDescription.className = "tree-label";
- eltDescription.innerHTML = strText;
- }
-
- eltSpan.appendChild (eltDescription);
- eltDiv.appendChild (eltSpan);
-
- // append this node to its parent
- if (eltParent)
- eltParent.appendChild (eltDiv);
- else
- this.SelectNode (eltDiv);
-
- return eltDiv;
- }
-
- this.SelectNode = function (eltDiv)
- {
- if (this.eltSelected != eltDiv)
- {
- if (eltDiv)
- {
- var eltLabel = this.GetSpan (eltDiv);
- eltLabel.className = "tree-label-selected";
- }
- if (this.eltSelected)
- {
- var eltLabel = this.GetSpan (this.eltSelected);
- eltLabel.className = "tree-label";
- }
- this.eltSelected = eltDiv;
- }
- }
-
- this.LoadNode = function (eltIcon)
- {
- var eltDiv = this.GetDivFromIcon (eltIcon);
- eltIcon.onclick = null;
-
- var eltLoading = this.CreateItem (eltDiv, "<img src=\"../images/searching.gif\"/>Loading...", null, null, true);
- eltLoading.className = '';
-
- var xmlHttp = XmlHttp.create();
- xmlHttp.open ("GET", this.strSrcBase + eltDiv.tree_src, true); // async
- var _this = this;
- xmlHttp.onreadystatechange = function () { _this.onReadyStateChange (xmlHttp, eltIcon, eltLoading); }
- setTimeout (function () { xmlHttp.send (null); }, 10);
- }
-
- this.onReadyStateChange = function (xmlHttp, eltIcon, eltLoading)
- {
- if (xmlHttp.readyState != 4)
- return;
- // XML loaded
- var eltDiv = this.GetDivFromIcon (eltIcon);
-
- try
- {
- var doc = xmlHttp.responseXML;
- var root = doc.documentElement;
-
- var nodes = root.childNodes;
- var cNodes = nodes.length;
-
- for (var iNode = 0; iNode < cNodes; iNode ++)
- this.CreateItemFromXML (nodes [iNode], iNode == cNodes-1, eltDiv);
-
- eltDiv.removeChild (eltLoading);
-
- if (this.eltSelected == eltLoading)
- this.SelectNode (this.GetFirstChild (eltDiv));
-
- eltIcon.src = this.GetIconSrc (eltDiv, false);
- }
- catch (e)
- {
- this.SetText (eltLoading, "Failed to load topic");
- }
- eltDiv.className = "tree-node";
- var _this = this;
- eltIcon.onclick = function () { _this.onClickMinus (this); }
- }
-
- this.ExpandFromPath = function (path)
- {
- var root = $('.tree-node').first ();
- var elements = path.split('@');
-
- var thisSave = this;
- var finish = function (node, i, opened) {
- node = $(node);
- if (!opened) {
- node.attr('class', 'tree-node');
- var icon = node.children('span').children('img:nth-child(' + (i + 1) + ')');
- icon[0].onclick = function () { thisSave.onClickMinus (this); };
- icon.attr('src', thisSave.GetIconSrc (node[0], false));
- }
- root = node;
- if (i == elements.length - 1) {
- thisSave.SelectNode (node[0]);
- var container = $('#contents').parent ();
- container.scrollTop (node[0].offsetTop - 100);
- }
- };
- var recurse = function (i) {
- if (i >= elements.length)
- return;
- var node = root.children ('div')[elements[i]];
- // Tree already loaded
- if ($(node).find ('div').first ().length == 0) {
- var url = thisSave.strSrcBase + elements.slice(0, i + 1).join('@');
- $.get (url, function (data) {
- var doc = data.documentElement;
-
- var children = doc.childNodes;
- var cChildren = children.length;
-
- for (var iNode = 0; iNode < cChildren; iNode ++)
- thisSave.CreateItemFromXML (children[iNode], iNode == cChildren - 1, node)
-
- // We finish node creation by opening up its tree like clicking would normally do
- finish (node, i, false);
- recurse (i + 1);
- });
- } else {
- finish (node, i, true);
- recurse (i + 1);
- }
- };
- recurse (0);
- }
-
- this.onClickPlus = function (eltIcon)
- {
- var eltDiv = this.GetDivFromIcon (eltIcon);
- eltDiv.className = "tree-node";
- eltIcon.src = this.GetIconSrc (eltDiv, false);
- var _this = this;
- eltIcon.onclick = function () { _this.onClickMinus (this); }
- }
-
- this.onClickMinus = function (eltIcon)
- {
- var eltDiv = this.GetDivFromIcon (eltIcon);
- eltDiv.className = "tree-node-collapsed";
- eltIcon.src = this.GetIconSrc (eltDiv, true);
- var _this = this;
- eltIcon.onclick = function () { _this.onClickPlus (this); }
- }
-
- this.onKeyDown = function (event)
- {
- var eltSelect = this.eltSelected;
- var fLast = this.IsLastDiv (eltSelect);
- var fRoot = this.IsRootDiv (eltSelect);
-
- switch (event.keyCode)
- {
- case 13: // return
- var eltLink = eltSelect.firstChild.lastChild;
- if (eltSelect.tree_action)
- window.open (eltLink.href, eltLink.target);
- this.SelectNode (eltSelect);
- return false; // don't EnsureVisible
-
- case 38: // up
- if (!fRoot)
- {
- if (this.IsFirstChild (eltSelect))
- eltSelect = this.GetParentDiv (eltSelect);
- else
- {
- eltSelect = eltSelect.previousSibling;
- while (this.IsExpanded (eltSelect))
- eltSelect = eltSelect.lastChild;
- }
- }
- break;
-
- case 40: // down
- if (this.IsExpanded (eltSelect))
- eltSelect = this.GetFirstChild (eltSelect);
- else if (!fLast)
- eltSelect = eltSelect.nextSibling;
- else
- {
- while (!this.IsRootDiv (eltSelect) && this.IsLastDiv (eltSelect))
- eltSelect = this.GetParentDiv (eltSelect);
-
- if (this.IsRootDiv (eltSelect))
- return false;
-
- eltSelect = eltSelect.nextSibling;
- }
- break;
-
- case 37: // left
- if (!fRoot)
- {
- if (this.IsExpanded (eltSelect))
- this.onClickMinus (this.GetIconFromDiv (eltSelect));
- else
- eltSelect = this.GetParentDiv (eltSelect);
- }
- break;
-
- case 39: // right
- if (this.HasChildren (eltSelect))
- {
- var eltChild = this.GetFirstChild (eltSelect);
- if (this.IsExpanded (eltSelect))
- eltSelect = eltChild;
- else if (eltChild != null)
- this.onClickPlus (this.GetIconFromDiv (eltSelect));
- else
- this.LoadNode (this.GetIconFromDiv (eltSelect));
- }
- break;
-
- default:
- return true;
- }
-
- this.SelectNode (eltSelect);
- this.EnsureVisible (this.GetLabel (eltSelect));
-
- return false;
- }
-
- this.SetText = function (eltDiv, strText)
- {
- var eltText = eltDiv.lastChild;
- eltText.nodeValue = strText;
- }
-
- this.GetIconSrc = function (eltDiv, fPlus)
- {
- var strIconSrc = this.IsLastDiv (eltDiv) ? "L" : "T";
- if (eltDiv.tree_src != null)
- strIconSrc += fPlus ? "plus" : "minus";
- return this.strImagesBase + strIconSrc + this.strImageExt;
- }
-
- this.GetDivFromIcon = function (eltIcon)
- {
- return eltIcon.parentNode.parentNode;
- }
-
- this.GetIconFromDiv = function (eltDiv)
- {
- return eltDiv.firstChild.lastChild.previousSibling;
- }
-
- this.GetFirstChild = function (eltDiv)
- {
- return eltDiv.firstChild.nextSibling;
- }
-
- this.GetSpan = function (eltDiv)
- {
- return eltDiv.firstChild;
- }
-
- this.GetLabel = function (eltDiv)
- {
- return eltDiv.firstChild.lastChild;
- }
-
- this.GetParentDiv = function (eltDiv)
- {
- if (this.IsRootDiv (eltDiv))
- return null;
- return eltDiv.parentNode;
- }
-
- this.HasChildren = function (eltDiv)
- {
- return eltDiv.tree_src || this.IsRootDiv (eltDiv);
- }
-
- this.IsLastDiv = function (eltDiv)
- {
- return eltDiv.tree_fLast;
- }
-
- this.IsRootDiv = function (eltDiv)
- {
- return Boolean (eltDiv.tree_fRoot);
- }
-
- this.IsExpanded = function (eltDiv)
- {
- return eltDiv.className != "tree-node-collapsed";
- }
-
- this.IsFirstChild = function (eltDiv)
- {
- var fFirst =
- eltDiv.previousSibling &&
- eltDiv.previousSibling.tagName != "DIV";
- return fFirst;
- }
-
- this.EnsureVisible = function (elt)
- {
- var x = 0;
- var y = 0;
- var parent = elt;
- while (parent != null)
- {
- x += parent.offsetLeft;
- y += parent.offsetTop;
- parent = parent.offsetParent;
- }
-
- var yView = window.frameElement.scrollTop + document.body.scrollTop;
- var dyView = document.body.clientHeight;
- var dy = 0;
- if (y + elt.offsetHeight > yView + dyView)
- dy = (y + elt.offsetHeight) - (yView + dyView);
- if (y < yView + dy)
- dy = y - yView;
-
- var xView = window.frameElement.scrollLeft + document.body.scrollLeft;
- var dxView = document.body.clientWidth;
- var dx = 0;
- if (x + elt.offsetWidth > xView + dxView)
- dx = (x + elt.offsetWidth) - (xView + dxView);
- if (x < xView + dx)
- dx = x - xView;
-
- if (dx != 0 || dy != 0)
- window.scrollBy (dx, dy);
- }
-}
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