blob: dd4552f7e154b008178c608a62385f981cf76e9b [file] [log] [blame]
var gSelectedIndex = -1;
var gSelectedID = -1;
var gMatches = new Array();
var gLastText = "";
var ROW_COUNT = 20;
var gInitialized = false;
var DEFAULT_TEXT = "search developer docs";
function set_row_selected(row, selected)
{
var c1 = row.cells[0];
// var c2 = row.cells[1];
if (selected) {
c1.className = "jd-autocomplete jd-selected";
// c2.className = "jd-autocomplete jd-selected jd-linktype";
} else {
c1.className = "jd-autocomplete";
// c2.className = "jd-autocomplete jd-linktype";
}
}
function set_row_values(toroot, row, match)
{
var link = row.cells[0].childNodes[0];
link.innerHTML = match.__hilabel || match.label;
link.href = toroot + match.link
// row.cells[1].innerHTML = match.type;
}
function sync_selection_table(toroot)
{
var filtered = document.getElementById("search_filtered");
var r; //TR DOM object
var i; //TR iterator
gSelectedID = -1;
filtered.onmouseover = function() {
if(gSelectedIndex >= 0) {
set_row_selected(this.rows[gSelectedIndex], false);
gSelectedIndex = -1;
}
}
//initialize the table; draw it for the first time (but not visible).
if (!gInitialized) {
for (i=0; i<ROW_COUNT; i++) {
var r = filtered.insertRow(-1);
var c1 = r.insertCell(-1);
// var c2 = r.insertCell(-1);
c1.className = "jd-autocomplete";
// c2.className = "jd-autocomplete jd-linktype";
var link = document.createElement("a");
c1.onmousedown = function() {
window.location = this.firstChild.getAttribute("href");
}
c1.onmouseover = function() {
this.className = this.className + " jd-selected";
}
c1.onmouseout = function() {
this.className = "jd-autocomplete";
}
c1.appendChild(link);
}
/* var r = filtered.insertRow(-1);
var c1 = r.insertCell(-1);
c1.className = "jd-autocomplete jd-linktype";
c1.colSpan = 2; */
gInitialized = true;
}
//if we have results, make the table visible and initialize result info
if (gMatches.length > 0) {
document.getElementById("search_filtered_div").className = "showing";
var N = gMatches.length < ROW_COUNT ? gMatches.length : ROW_COUNT;
for (i=0; i<N; i++) {
r = filtered.rows[i];
r.className = "show-row";
set_row_values(toroot, r, gMatches[i]);
set_row_selected(r, i == gSelectedIndex);
if (i == gSelectedIndex) {
gSelectedID = gMatches[i].id;
}
}
//start hiding rows that are no longer matches
for (; i<ROW_COUNT; i++) {
r = filtered.rows[i];
r.className = "no-display";
}
//if there are more results we're not showing, so say so.
/* if (gMatches.length > ROW_COUNT) {
r = filtered.rows[ROW_COUNT];
r.className = "show-row";
c1 = r.cells[0];
c1.innerHTML = "plus " + (gMatches.length-ROW_COUNT) + " more";
} else {
filtered.rows[ROW_COUNT].className = "hide-row";
}*/
//if we have no results, hide the table
} else {
document.getElementById("search_filtered_div").className = "no-display";
}
}
function search_changed(e, kd, toroot)
{
var search = document.getElementById("search_autocomplete");
var text = search.value.replace(/(^ +)|( +$)/g, '');
// 13 = enter
if (e.keyCode == 13) {
document.getElementById("search_filtered_div").className = "no-display";
if (kd && gSelectedIndex >= 0) {
window.location = toroot + gMatches[gSelectedIndex].link;
return false;
} else if (gSelectedIndex < 0) {
return true;
}
}
// 38 -- arrow up
else if (kd && (e.keyCode == 38)) {
if (gSelectedIndex >= 0) {
gSelectedIndex--;
}
sync_selection_table(toroot);
return false;
}
// 40 -- arrow down
else if (kd && (e.keyCode == 40)) {
if (gSelectedIndex < gMatches.length-1
&& gSelectedIndex < ROW_COUNT-1) {
gSelectedIndex++;
}
sync_selection_table(toroot);
return false;
}
else if (!kd) {
gMatches = new Array();
matchedCount = 0;
gSelectedIndex = -1;
for (var i=0; i<DATA.length; i++) {
var s = DATA[i];
if (text.length != 0 &&
s.label.toLowerCase().indexOf(text.toLowerCase()) != -1) {
gMatches[matchedCount] = s;
matchedCount++;
}
}
rank_autocomplete_results(text);
for (var i=0; i<gMatches.length; i++) {
var s = gMatches[i];
if (gSelectedID == s.id) {
gSelectedIndex = i;
}
}
highlight_autocomplete_result_labels(text);
sync_selection_table(toroot);
return true; // allow the event to bubble up to the search api
}
}
function rank_autocomplete_results(query) {
query = query || '';
if (!gMatches || !gMatches.length)
return;
// helper function that gets the last occurence index of the given regex
// in the given string, or -1 if not found
var _lastSearch = function(s, re) {
if (s == '')
return -1;
var l = -1;
var tmp;
while ((tmp = s.search(re)) >= 0) {
if (l < 0) l = 0;
l += tmp;
s = s.substr(tmp + 1);
}
return l;
};
// helper function that counts the occurrences of a given character in
// a given string
var _countChar = function(s, c) {
var n = 0;
for (var i=0; i<s.length; i++)
if (s.charAt(i) == c) ++n;
return n;
};
var queryLower = query.toLowerCase();
var queryAlnum = (queryLower.match(/\w+/) || [''])[0];
var partPrefixAlnumRE = new RegExp('\\b' + queryAlnum);
var partExactAlnumRE = new RegExp('\\b' + queryAlnum + '\\b');
var _resultScoreFn = function(result) {
// scores are calculated based on exact and prefix matches,
// and then number of path separators (dots) from the last
// match (i.e. favoring classes and deep package names)
var score = 1.0;
var labelLower = result.label.toLowerCase();
var t;
t = _lastSearch(labelLower, partExactAlnumRE);
if (t >= 0) {
// exact part match
var partsAfter = _countChar(labelLower.substr(t + 1), '.');
score *= 200 / (partsAfter + 1);
} else {
t = _lastSearch(labelLower, partPrefixAlnumRE);
if (t >= 0) {
// part prefix match
var partsAfter = _countChar(labelLower.substr(t + 1), '.');
score *= 20 / (partsAfter + 1);
}
}
return score;
};
for (var i=0; i<gMatches.length; i++) {
gMatches[i].__resultScore = _resultScoreFn(gMatches[i]);
}
gMatches.sort(function(a,b){
var n = b.__resultScore - a.__resultScore;
if (n == 0) // lexicographical sort if scores are the same
n = (a.label < b.label) ? -1 : 1;
return n;
});
}
function highlight_autocomplete_result_labels(query) {
query = query || '';
if (!gMatches || !gMatches.length)
return;
var queryLower = query.toLowerCase();
var queryAlnumDot = (queryLower.match(/[\w\.]+/) || [''])[0];
var queryRE = new RegExp(
'(' + queryAlnumDot.replace(/\./g, '\\.') + ')', 'ig');
for (var i=0; i<gMatches.length; i++) {
gMatches[i].__hilabel = gMatches[i].label.replace(
queryRE, '<b>$1</b>');
}
}
function search_focus_changed(obj, focused)
{
if (focused) {
if(obj.value == DEFAULT_TEXT){
obj.value = "";
obj.style.color="#000000";
}
} else {
if(obj.value == ""){
obj.value = DEFAULT_TEXT;
obj.style.color="#aaaaaa";
}
document.getElementById("search_filtered_div").className = "no-display";
}
}
function submit_search() {
var query = document.getElementById('search_autocomplete').value;
document.location = toRoot + 'search.html#q=' + query + '&t=0';
return false;
}