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search.js
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791 lines (723 loc) · 21.6 KB
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function convertToId(search)
{
var result = '';
for (i=0;i<search.length;i++)
{
var c = search.charAt(i);
var cn = c.charCodeAt(0);
if (c.match(/[a-z0-9\u0080-\uFFFF]/))
{
result+=c;
}
else if (cn<16)
{
result+="_0"+cn.toString(16);
}
else
{
result+="_"+cn.toString(16);
}
}
return result;
}
function getXPos(item)
{
var x = 0;
if (item.offsetWidth)
{
while (item && item!=document.body)
{
x += item.offsetLeft;
item = item.offsetParent;
}
}
return x;
}
function getYPos(item)
{
var y = 0;
if (item.offsetWidth)
{
while (item && item!=document.body)
{
y += item.offsetTop;
item = item.offsetParent;
}
}
return y;
}
/* A class handling everything associated with the search panel.
Parameters:
name - The name of the global variable that will be
storing this instance. Is needed to be able to set timeouts.
resultPath - path to use for external files
*/
function SearchBox(name, resultsPath, inFrame, label)
{
if (!name || !resultsPath) { alert("Missing parameters to SearchBox."); }
// ---------- Instance variables
this.name = name;
this.resultsPath = resultsPath;
this.keyTimeout = 0;
this.keyTimeoutLength = 500;
this.closeSelectionTimeout = 300;
this.lastSearchValue = "";
this.lastResultsPage = "";
this.hideTimeout = 0;
this.searchIndex = 0;
this.searchActive = false;
this.insideFrame = inFrame;
this.searchLabel = label;
// ----------- DOM Elements
this.DOMSearchField = function()
{ return document.getElementById("MSearchField"); }
this.DOMSearchSelect = function()
{ return document.getElementById("MSearchSelect"); }
this.DOMSearchSelectWindow = function()
{ return document.getElementById("MSearchSelectWindow"); }
this.DOMPopupSearchResults = function()
{ return document.getElementById("MSearchResults"); }
this.DOMPopupSearchResultsWindow = function()
{ return document.getElementById("MSearchResultsWindow"); }
this.DOMSearchClose = function()
{ return document.getElementById("MSearchClose"); }
this.DOMSearchBox = function()
{ return document.getElementById("MSearchBox"); }
// ------------ Event Handlers
// Called when focus is added or removed from the search field.
this.OnSearchFieldFocus = function(isActive)
{
this.Activate(isActive);
}
this.OnSearchSelectShow = function()
{
var searchSelectWindow = this.DOMSearchSelectWindow();
var searchField = this.DOMSearchSelect();
if (this.insideFrame)
{
var left = getXPos(searchField);
var top = getYPos(searchField);
left += searchField.offsetWidth + 6;
top += searchField.offsetHeight;
// show search selection popup
searchSelectWindow.style.display='block';
left -= searchSelectWindow.offsetWidth;
searchSelectWindow.style.left = left + 'px';
searchSelectWindow.style.top = top + 'px';
}
else
{
var left = getXPos(searchField);
var top = getYPos(searchField);
top += searchField.offsetHeight;
// show search selection popup
searchSelectWindow.style.display='block';
searchSelectWindow.style.left = left + 'px';
searchSelectWindow.style.top = top + 'px';
}
// stop selection hide timer
if (this.hideTimeout)
{
clearTimeout(this.hideTimeout);
this.hideTimeout=0;
}
return false; // to avoid "image drag" default event
}
this.OnSearchSelectHide = function()
{
this.hideTimeout = setTimeout(this.name +".CloseSelectionWindow()",
this.closeSelectionTimeout);
}
// Called when the content of the search field is changed.
this.OnSearchFieldChange = function(evt)
{
if (this.keyTimeout) // kill running timer
{
clearTimeout(this.keyTimeout);
this.keyTimeout = 0;
}
var e = (evt) ? evt : window.event; // for IE
if (e.keyCode==40 || e.keyCode==13)
{
if (e.shiftKey==1)
{
this.OnSearchSelectShow();
var win=this.DOMSearchSelectWindow();
for (i=0;i<win.childNodes.length;i++)
{
var child = win.childNodes[i]; // get span within a
if (child.className=='SelectItem')
{
child.focus();
return;
}
}
return;
}
else if (window.frames.MSearchResults.searchResults)
{
var elem = window.frames.MSearchResults.searchResults.NavNext(0);
if (elem) elem.focus();
}
}
else if (e.keyCode==27) // Escape out of the search field
{
this.DOMSearchField().blur();
this.DOMPopupSearchResultsWindow().style.display = 'none';
this.DOMSearchClose().style.display = 'none';
this.lastSearchValue = '';
this.Activate(false);
return;
}
// strip whitespaces
var searchValue = this.DOMSearchField().value.replace(/ +/g, "");
if (searchValue != this.lastSearchValue) // search value has changed
{
if (searchValue != "") // non-empty search
{
// set timer for search update
this.keyTimeout = setTimeout(this.name + '.Search()',
this.keyTimeoutLength);
}
else // empty search field
{
this.DOMPopupSearchResultsWindow().style.display = 'none';
this.DOMSearchClose().style.display = 'none';
this.lastSearchValue = '';
}
}
}
this.SelectItemCount = function(id)
{
var count=0;
var win=this.DOMSearchSelectWindow();
for (i=0;i<win.childNodes.length;i++)
{
var child = win.childNodes[i]; // get span within a
if (child.className=='SelectItem')
{
count++;
}
}
return count;
}
this.SelectItemSet = function(id)
{
var i,j=0;
var win=this.DOMSearchSelectWindow();
for (i=0;i<win.childNodes.length;i++)
{
var child = win.childNodes[i]; // get span within a
if (child.className=='SelectItem')
{
var node = child.firstChild;
if (j==id)
{
node.innerHTML='•';
}
else
{
node.innerHTML=' ';
}
j++;
}
}
}
// Called when an search filter selection is made.
// set item with index id as the active item
this.OnSelectItem = function(id)
{
this.searchIndex = id;
this.SelectItemSet(id);
var searchValue = this.DOMSearchField().value.replace(/ +/g, "");
if (searchValue!="" && this.searchActive) // something was found -> do a search
{
this.Search();
}
}
this.OnSearchSelectKey = function(evt)
{
var e = (evt) ? evt : window.event; // for IE
if (e.keyCode==40 && this.searchIndex<this.SelectItemCount()) // Down
{
this.searchIndex++;
this.OnSelectItem(this.searchIndex);
}
else if (e.keyCode==38 && this.searchIndex>0) // Up
{
this.searchIndex--;
this.OnSelectItem(this.searchIndex);
}
else if (e.keyCode==13 || e.keyCode==27)
{
this.OnSelectItem(this.searchIndex);
this.CloseSelectionWindow();
this.DOMSearchField().focus();
}
return false;
}
// --------- Actions
// Closes the results window.
this.CloseResultsWindow = function()
{
this.DOMPopupSearchResultsWindow().style.display = 'none';
this.DOMSearchClose().style.display = 'none';
this.Activate(false);
}
this.CloseSelectionWindow = function()
{
this.DOMSearchSelectWindow().style.display = 'none';
}
// Performs a search.
this.Search = function()
{
this.keyTimeout = 0;
// strip leading whitespace
var searchValue = this.DOMSearchField().value.replace(/^ +/, "");
var code = searchValue.toLowerCase().charCodeAt(0);
var idxChar = searchValue.substr(0, 1).toLowerCase();
if ( 0xD800 <= code && code <= 0xDBFF && searchValue > 1) // surrogate pair
{
idxChar = searchValue.substr(0, 2);
}
var resultsPage;
var resultsPageWithSearch;
var hasResultsPage;
var idx = indexSectionsWithContent[this.searchIndex].indexOf(idxChar);
if (idx!=-1)
{
var hexCode=idx.toString(16);
resultsPage = this.resultsPath + '/' + indexSectionNames[this.searchIndex] + '_' + hexCode + '.html';
resultsPageWithSearch = resultsPage+'?'+escape(searchValue);
hasResultsPage = true;
}
else // nothing available for this search term
{
resultsPage = this.resultsPath + '/nomatches.html';
resultsPageWithSearch = resultsPage;
hasResultsPage = false;
}
window.frames.MSearchResults.location = resultsPageWithSearch;
var domPopupSearchResultsWindow = this.DOMPopupSearchResultsWindow();
if (domPopupSearchResultsWindow.style.display!='block')
{
var domSearchBox = this.DOMSearchBox();
this.DOMSearchClose().style.display = 'inline';
if (this.insideFrame)
{
var domPopupSearchResults = this.DOMPopupSearchResults();
domPopupSearchResultsWindow.style.position = 'relative';
domPopupSearchResultsWindow.style.display = 'block';
var width = document.body.clientWidth - 8; // the -8 is for IE :-(
domPopupSearchResultsWindow.style.width = width + 'px';
domPopupSearchResults.style.width = width + 'px';
}
else
{
var domPopupSearchResults = this.DOMPopupSearchResults();
var left = getXPos(domSearchBox) + 150; // domSearchBox.offsetWidth;
var top = getYPos(domSearchBox) + 20; // domSearchBox.offsetHeight + 1;
domPopupSearchResultsWindow.style.display = 'block';
left -= domPopupSearchResults.offsetWidth;
domPopupSearchResultsWindow.style.top = top + 'px';
domPopupSearchResultsWindow.style.left = left + 'px';
}
}
this.lastSearchValue = searchValue;
this.lastResultsPage = resultsPage;
}
// -------- Activation Functions
// Activates or deactivates the search panel, resetting things to
// their default values if necessary.
this.Activate = function(isActive)
{
if (isActive || // open it
this.DOMPopupSearchResultsWindow().style.display == 'block'
)
{
this.DOMSearchBox().className = 'MSearchBoxActive';
var searchField = this.DOMSearchField();
if (searchField.value == this.searchLabel) // clear "Search" term upon entry
{
searchField.value = '';
this.searchActive = true;
}
}
else if (!isActive) // directly remove the panel
{
this.DOMSearchBox().className = 'MSearchBoxInactive';
this.DOMSearchField().value = this.searchLabel;
this.searchActive = false;
this.lastSearchValue = ''
this.lastResultsPage = '';
}
}
}
// -----------------------------------------------------------------------
// The class that handles everything on the search results page.
function SearchResults(name)
{
// The number of matches from the last run of <Search()>.
this.lastMatchCount = 0;
this.lastKey = 0;
this.repeatOn = false;
// Toggles the visibility of the passed element ID.
this.FindChildElement = function(id)
{
var parentElement = document.getElementById(id);
var element = parentElement.firstChild;
while (element && element!=parentElement)
{
if (element.nodeName == 'DIV' && element.className == 'SRChildren')
{
return element;
}
if (element.nodeName == 'DIV' && element.hasChildNodes())
{
element = element.firstChild;
}
else if (element.nextSibling)
{
element = element.nextSibling;
}
else
{
do
{
element = element.parentNode;
}
while (element && element!=parentElement && !element.nextSibling);
if (element && element!=parentElement)
{
element = element.nextSibling;
}
}
}
}
this.Toggle = function(id)
{
var element = this.FindChildElement(id);
if (element)
{
if (element.style.display == 'block')
{
element.style.display = 'none';
}
else
{
element.style.display = 'block';
}
}
}
// Searches for the passed string. If there is no parameter,
// it takes it from the URL query.
//
// Always returns true, since other documents may try to call it
// and that may or may not be possible.
this.Search = function(search)
{
if (!search) // get search word from URL
{
search = window.location.search;
search = search.substring(1); // Remove the leading '?'
search = unescape(search);
}
search = search.replace(/^ +/, ""); // strip leading spaces
search = search.replace(/ +$/, ""); // strip trailing spaces
search = search.toLowerCase();
search = convertToId(search);
var resultRows = document.getElementsByTagName("div");
var matches = 0;
var i = 0;
while (i < resultRows.length)
{
var row = resultRows.item(i);
if (row.className == "SRResult")
{
var rowMatchName = row.id.toLowerCase();
rowMatchName = rowMatchName.replace(/^sr\d*_/, ''); // strip 'sr123_'
if (search.length<=rowMatchName.length &&
rowMatchName.substr(0, search.length)==search)
{
row.style.display = 'block';
matches++;
}
else
{
row.style.display = 'none';
}
}
i++;
}
document.getElementById("Searching").style.display='none';
if (matches == 0) // no results
{
document.getElementById("NoMatches").style.display='block';
}
else // at least one result
{
document.getElementById("NoMatches").style.display='none';
}
this.lastMatchCount = matches;
return true;
}
// return the first item with index index or higher that is visible
this.NavNext = function(index)
{
var focusItem;
while (1)
{
var focusName = 'Item'+index;
focusItem = document.getElementById(focusName);
if (focusItem && focusItem.parentNode.parentNode.style.display=='block')
{
break;
}
else if (!focusItem) // last element
{
break;
}
focusItem=null;
index++;
}
return focusItem;
}
this.NavPrev = function(index)
{
var focusItem;
while (1)
{
var focusName = 'Item'+index;
focusItem = document.getElementById(focusName);
if (focusItem && focusItem.parentNode.parentNode.style.display=='block')
{
break;
}
else if (!focusItem) // last element
{
break;
}
focusItem=null;
index--;
}
return focusItem;
}
this.ProcessKeys = function(e)
{
if (e.type == "keydown")
{
this.repeatOn = false;
this.lastKey = e.keyCode;
}
else if (e.type == "keypress")
{
if (!this.repeatOn)
{
if (this.lastKey) this.repeatOn = true;
return false; // ignore first keypress after keydown
}
}
else if (e.type == "keyup")
{
this.lastKey = 0;
this.repeatOn = false;
}
return this.lastKey!=0;
}
this.Nav = function(evt,itemIndex)
{
var e = (evt) ? evt : window.event; // for IE
if (e.keyCode==13) return true;
if (!this.ProcessKeys(e)) return false;
if (this.lastKey==38) // Up
{
var newIndex = itemIndex-1;
var focusItem = this.NavPrev(newIndex);
if (focusItem)
{
var child = this.FindChildElement(focusItem.parentNode.parentNode.id);
if (child && child.style.display == 'block') // children visible
{
var n=0;
var tmpElem;
while (1) // search for last child
{
tmpElem = document.getElementById('Item'+newIndex+'_c'+n);
if (tmpElem)
{
focusItem = tmpElem;
}
else // found it!
{
break;
}
n++;
}
}
}
if (focusItem)
{
focusItem.focus();
}
else // return focus to search field
{
parent.document.getElementById("MSearchField").focus();
}
}
else if (this.lastKey==40) // Down
{
var newIndex = itemIndex+1;
var focusItem;
var item = document.getElementById('Item'+itemIndex);
var elem = this.FindChildElement(item.parentNode.parentNode.id);
if (elem && elem.style.display == 'block') // children visible
{
focusItem = document.getElementById('Item'+itemIndex+'_c0');
}
if (!focusItem) focusItem = this.NavNext(newIndex);
if (focusItem) focusItem.focus();
}
else if (this.lastKey==39) // Right
{
var item = document.getElementById('Item'+itemIndex);
var elem = this.FindChildElement(item.parentNode.parentNode.id);
if (elem) elem.style.display = 'block';
}
else if (this.lastKey==37) // Left
{
var item = document.getElementById('Item'+itemIndex);
var elem = this.FindChildElement(item.parentNode.parentNode.id);
if (elem) elem.style.display = 'none';
}
else if (this.lastKey==27) // Escape
{
parent.searchBox.CloseResultsWindow();
parent.document.getElementById("MSearchField").focus();
}
else if (this.lastKey==13) // Enter
{
return true;
}
return false;
}
this.NavChild = function(evt,itemIndex,childIndex)
{
var e = (evt) ? evt : window.event; // for IE
if (e.keyCode==13) return true;
if (!this.ProcessKeys(e)) return false;
if (this.lastKey==38) // Up
{
if (childIndex>0)
{
var newIndex = childIndex-1;
document.getElementById('Item'+itemIndex+'_c'+newIndex).focus();
}
else // already at first child, jump to parent
{
document.getElementById('Item'+itemIndex).focus();
}
}
else if (this.lastKey==40) // Down
{
var newIndex = childIndex+1;
var elem = document.getElementById('Item'+itemIndex+'_c'+newIndex);
if (!elem) // last child, jump to parent next parent
{
elem = this.NavNext(itemIndex+1);
}
if (elem)
{
elem.focus();
}
}
else if (this.lastKey==27) // Escape
{
parent.searchBox.CloseResultsWindow();
parent.document.getElementById("MSearchField").focus();
}
else if (this.lastKey==13) // Enter
{
return true;
}
return false;
}
}
function setKeyActions(elem,action)
{
elem.setAttribute('onkeydown',action);
elem.setAttribute('onkeypress',action);
elem.setAttribute('onkeyup',action);
}
function setClassAttr(elem,attr)
{
elem.setAttribute('class',attr);
elem.setAttribute('className',attr);
}
function createResults()
{
var results = document.getElementById("SRResults");
for (var e=0; e<searchData.length; e++)
{
var id = searchData[e][0];
var srResult = document.createElement('div');
srResult.setAttribute('id','SR_'+id);
setClassAttr(srResult,'SRResult');
var srEntry = document.createElement('div');
setClassAttr(srEntry,'SREntry');
var srLink = document.createElement('a');
srLink.setAttribute('id','Item'+e);
setKeyActions(srLink,'return searchResults.Nav(event,'+e+')');
setClassAttr(srLink,'SRSymbol');
srLink.innerHTML = searchData[e][1][0];
srEntry.appendChild(srLink);
if (searchData[e][1].length==2) // single result
{
srLink.setAttribute('href',searchData[e][1][1][0]);
if (searchData[e][1][1][1])
{
srLink.setAttribute('target','_parent');
}
var srScope = document.createElement('span');
setClassAttr(srScope,'SRScope');
srScope.innerHTML = searchData[e][1][1][2];
srEntry.appendChild(srScope);
}
else // multiple results
{
srLink.setAttribute('href','javascript:searchResults.Toggle("SR_'+id+'")');
var srChildren = document.createElement('div');
setClassAttr(srChildren,'SRChildren');
for (var c=0; c<searchData[e][1].length-1; c++)
{
var srChild = document.createElement('a');
srChild.setAttribute('id','Item'+e+'_c'+c);
setKeyActions(srChild,'return searchResults.NavChild(event,'+e+','+c+')');
setClassAttr(srChild,'SRScope');
srChild.setAttribute('href',searchData[e][1][c+1][0]);
if (searchData[e][1][c+1][1])
{
srChild.setAttribute('target','_parent');
}
srChild.innerHTML = searchData[e][1][c+1][2];
srChildren.appendChild(srChild);
}
srEntry.appendChild(srChildren);
}
srResult.appendChild(srEntry);
results.appendChild(srResult);
}
}
function init_search()
{
var results = document.getElementById("MSearchSelectWindow");
for (var key in indexSectionLabels)
{
var link = document.createElement('a');
link.setAttribute('class','SelectItem');
link.setAttribute('onclick','searchBox.OnSelectItem('+key+')');
link.href='javascript:void(0)';
link.innerHTML='<span class="SelectionMark"> </span>'+indexSectionLabels[key];
results.appendChild(link);
}
searchBox.OnSelectItem(0);
}