fakefs/js/searchdoc.js
Chris Wanstrath f3ab9f70b5 create docs
2009-10-06 21:44:05 -07:00

629 lines
20 KiB
JavaScript
Executable File

Searchdoc = {};
// navigation.js ------------------------------------------
Searchdoc.Navigation = new function() {
this.initNavigation = function() {
var _this = this;
$(document).keydown(function(e) {
_this.onkeydown(e);
}).keyup(function(e) {
_this.onkeyup(e);
});
this.navigationActive = true;
}
this.setNavigationActive = function(state) {
this.navigationActive = state;
this.clearMoveTimeout();
}
this.onkeyup = function(e) {
if (!this.navigationActive) return;
switch(e.keyCode) {
case 37: //Event.KEY_LEFT:
case 38: //Event.KEY_UP:
case 39: //Event.KEY_RIGHT:
case 40: //Event.KEY_DOWN:
case 73: // i - qwerty
case 74: // j
case 75: // k
case 76: // l
case 67: // c - dvorak
case 72: // h
case 84: // t
case 78: // n
this.clearMoveTimeout();
break;
}
}
this.onkeydown = function(e) {
if (!this.navigationActive) return;
switch(e.keyCode) {
case 37: //Event.KEY_LEFT:
case 74: // j (qwerty)
case 72: // h (dvorak)
if (this.moveLeft()) e.preventDefault();
break;
case 38: //Event.KEY_UP:
case 73: // i (qwerty)
case 67: // c (dvorak)
if (e.keyCode == 38 || e.ctrlKey) {
if (this.moveUp()) e.preventDefault();
this.startMoveTimeout(false);
}
break;
case 39: //Event.KEY_RIGHT:
case 76: // l (qwerty)
case 78: // n (dvorak)
if (this.moveRight()) e.preventDefault();
break;
case 40: //Event.KEY_DOWN:
case 75: // k (qwerty)
case 84: // t (dvorak)
if (e.keyCode == 40 || e.ctrlKey) {
if (this.moveDown()) e.preventDefault();
this.startMoveTimeout(true);
}
break;
case 9: //Event.KEY_TAB:
case 13: //Event.KEY_RETURN:
if (this.$current) this.select(this.$current);
break;
}
if (e.ctrlKey && e.shiftKey) this.select(this.$current);
}
this.clearMoveTimeout = function() {
clearTimeout(this.moveTimeout);
this.moveTimeout = null;
}
this.startMoveTimeout = function(isDown) {
if (!$.browser.mozilla && !$.browser.opera) return;
if (this.moveTimeout) this.clearMoveTimeout();
var _this = this;
var go = function() {
if (!_this.moveTimeout) return;
_this[isDown ? 'moveDown' : 'moveUp']();
_this.moveTimout = setTimeout(go, 100);
}
this.moveTimeout = setTimeout(go, 200);
}
this.moveRight = function() {
}
this.moveLeft = function() {
}
this.move = function(isDown) {
}
this.moveUp = function() {
return this.move(false);
}
this.moveDown = function() {
return this.move(true);
}
}
// scrollIntoView.js --------------------------------------
function scrollIntoView(element, view) {
var offset, viewHeight, viewScroll, height;
offset = element.offsetTop;
height = element.offsetHeight;
viewHeight = view.offsetHeight;
viewScroll = view.scrollTop;
if (offset - viewScroll + height > viewHeight) {
view.scrollTop = offset - viewHeight + height;
}
if (offset < viewScroll) {
view.scrollTop = offset;
}
}
// searcher.js --------------------------------------------
Searchdoc.Searcher = function(data) {
this.data = data;
this.handlers = [];
}
Searchdoc.Searcher.prototype = new function() {
var CHUNK_SIZE = 1000, // search is performed in chunks of 1000 for non-bloking user input
MAX_RESULTS = 100, // do not try to find more than 100 results
huid = 1, suid = 1,
runs = 0;
this.find = function(query) {
var queries = splitQuery(query),
regexps = buildRegexps(queries),
highlighters = buildHilighters(queries),
state = { from: 0, pass: 0, limit: MAX_RESULTS, n: suid++},
_this = this;
this.currentSuid = state.n;
if (!query) return;
var run = function() {
// stop current search thread if new search started
if (state.n != _this.currentSuid) return;
var results = performSearch(_this.data, regexps, queries, highlighters, state),
hasMore = (state.limit > 0 && state.pass < 3);
triggerResults.call(_this, results, !hasMore);
if (hasMore) {
setTimeout(run, 2);
}
runs++;
};
runs = 0;
// start search thread
run();
}
/* ----- Events ------ */
this.ready = function(fn) {
fn.huid = huid;
this.handlers.push(fn);
}
/* ----- Utilities ------ */
function splitQuery(query) {
return jQuery.grep(query.split(/(\s+|\(\)?)/), function(string) { return string.match(/\S/) });
}
function buildRegexps(queries) {
return jQuery.map(queries, function(query) { return new RegExp(query.replace(/(.)/g, '([$1])([^$1]*?)'), 'i') });
}
function buildHilighters(queries) {
return jQuery.map(queries, function(query) {
return jQuery.map( query.split(''), function(l, i){ return '\u0001$' + (i*2+1) + '\u0002$' + (i*2+2) } ).join('')
});
}
// function longMatchRegexp(index, longIndex, regexps) {
// for (var i = regexps.length - 1; i >= 0; i--){
// if (!index.match(regexps[i]) && !longIndex.match(regexps[i])) return false;
// };
// return true;
// }
/* ----- Mathchers ------ */
function matchPass1(index, longIndex, queries, regexps) {
if (index.indexOf(queries[0]) != 0) return false;
for (var i=1, l = regexps.length; i < l; i++) {
if (!index.match(regexps[i]) && !longIndex.match(regexps[i])) return false;
};
return true;
}
function matchPass2(index, longIndex, queries, regexps) {
if (index.indexOf(queries[0]) == -1) return false;
for (var i=1, l = regexps.length; i < l; i++) {
if (!index.match(regexps[i]) && !longIndex.match(regexps[i])) return false;
};
return true;
}
function matchPassRegexp(index, longIndex, queries, regexps) {
if (!index.match(regexps[0])) return false;
for (var i=1, l = regexps.length; i < l; i++) {
if (!index.match(regexps[i]) && !longIndex.match(regexps[i])) return false;
};
return true;
}
/* ----- Highlighters ------ */
function highlightRegexp(info, queries, regexps, highlighters) {
var result = createResult(info);
for (var i=0, l = regexps.length; i < l; i++) {
result.title = result.title.replace(regexps[i], highlighters[i]);
if (i > 0)
result.namespace = result.namespace.replace(regexps[i], highlighters[i]);
};
return result;
}
function hltSubstring(string, pos, length) {
return string.substring(0, pos) + '\u0001' + string.substring(pos, pos + length) + '\u0002' + string.substring(pos + length);
}
function highlightQuery(info, queries, regexps, highlighters) {
var result = createResult(info), pos = 0, lcTitle = result.title.toLowerCase();
pos = lcTitle.indexOf(queries[0]);
if (pos != -1) {
result.title = hltSubstring(result.title, pos, queries[0].length);
}
for (var i=1, l = regexps.length; i < l; i++) {
result.title = result.title.replace(regexps[i], highlighters[i]);
result.namespace = result.namespace.replace(regexps[i], highlighters[i]);
};
return result;
}
function createResult(info) {
var result = {};
result.title = info[0];
result.namespace = info[1];
result.path = info[2];
result.params = info[3];
result.snippet = info[4];
result.badge = info[6];
return result;
}
/* ----- Searching ------ */
function performSearch(data, regexps, queries, highlighters, state) {
var searchIndex = data.searchIndex, // search by title first and then by source
longSearchIndex = data.longSearchIndex,
info = data.info,
result = [],
i = state.from,
l = searchIndex.length,
togo = CHUNK_SIZE,
matchFunc, hltFunc;
while (state.pass < 3 && state.limit > 0 && togo > 0) {
if (state.pass == 0) {
matchFunc = matchPass1;
hltFunc = highlightQuery;
} else if (state.pass == 1) {
matchFunc = matchPass2;
hltFunc = highlightQuery;
} else if (state.pass == 2) {
matchFunc = matchPassRegexp;
hltFunc = highlightRegexp;
}
for (; togo > 0 && i < l && state.limit > 0; i++, togo--) {
if (info[i].n == state.n) continue;
if (matchFunc(searchIndex[i], longSearchIndex[i], queries, regexps)) {
info[i].n = state.n;
result.push(hltFunc(info[i], queries, regexps, highlighters));
state.limit--;
}
};
if (searchIndex.length <= i) {
state.pass++;
i = state.from = 0;
} else {
state.from = i;
}
}
return result;
}
function triggerResults(results, isLast) {
jQuery.each(this.handlers, function(i, fn) { fn.call(this, results, isLast) })
}
}
// panel.js -----------------------------------------------
Searchdoc.Panel = function(element, data, tree, frame) {
this.$element = $(element);
this.$input = $('input', element).eq(0);
this.$result = $('.result ul', element).eq(0);
this.frame = frame;
this.$current = null;
this.$view = this.$result.parent();
this.data = data;
this.searcher = new Searchdoc.Searcher(data.index);
this.tree = new Searchdoc.Tree($('.tree', element), tree, this);
this.init();
}
Searchdoc.Panel.prototype = $.extend({}, Searchdoc.Navigation, new function() {
var suid = 1;
this.init = function() {
var _this = this;
var observer = function() {
_this.search(_this.$input[0].value);
};
this.$input.keyup(observer);
this.$input.click(observer); // mac's clear field
this.searcher.ready(function(results, isLast) {
_this.addResults(results, isLast);
})
this.$result.click(function(e) {
_this.$current.removeClass('current');
_this.$current = $(e.target).closest('li').addClass('current');
_this.select();
_this.$input.focus();
});
this.initNavigation();
this.setNavigationActive(false);
}
this.search = function(value, selectFirstMatch) {
value = jQuery.trim(value).toLowerCase();
this.selectFirstMatch = selectFirstMatch;
if (value) {
this.$element.removeClass('panel_tree').addClass('panel_results');
this.tree.setNavigationActive(false);
this.setNavigationActive(true);
} else {
this.$element.addClass('panel_tree').removeClass('panel_results');
this.tree.setNavigationActive(true);
this.setNavigationActive(false);
}
if (value != this.lastQuery) {
this.lastQuery = value;
this.firstRun = true;
this.searcher.find(value);
}
}
this.addResults = function(results, isLast) {
var target = this.$result.get(0);
if (this.firstRun && (results.length > 0 || isLast)) {
this.$current = null;
this.$result.empty();
}
for (var i=0, l = results.length; i < l; i++) {
target.appendChild(renderItem.call(this, results[i]));
};
if (this.firstRun && results.length > 0) {
this.firstRun = false;
this.$current = $(target.firstChild);
this.$current.addClass('current');
if (this.selectFirstMatch) this.select();
scrollIntoView(this.$current[0], this.$view[0])
}
if (jQuery.browser.msie) this.$element[0].className += '';
}
this.open = function(src) {
this.frame.location.href = '../' + src;
if (this.frame.highlight) this.frame.highlight(src);
}
this.select = function() {
this.open(this.$current.data('path'));
}
this.move = function(isDown) {
if (!this.$current) return;
var $next = this.$current[isDown ? 'next' : 'prev']();
if ($next.length) {
this.$current.removeClass('current');
$next.addClass('current');
scrollIntoView($next[0], this.$view[0]);
this.$current = $next;
}
return true;
}
function renderItem(result) {
var li = document.createElement('li'),
html = '', badge = result.badge;
html += '<h1>' + hlt(result.title);
if (result.params) html += '<i>' + result.params + '</i>';
html += '</h1>';
html += '<p>';
if (typeof badge != 'undefined') {
html += '<span class="badge badge_' + (badge % 6 + 1) + '">' + escapeHTML(this.data.badges[badge] || 'unknown') + '</span>';
}
html += hlt(result.namespace) + '</p>';
if (result.snippet) html += '<p class="snippet">' + escapeHTML(result.snippet) + '</p>';
li.innerHTML = html;
jQuery.data(li, 'path', result.path);
return li;
}
function hlt(html) {
return escapeHTML(html).replace(/\u0001/g, '<b>').replace(/\u0002/g, '</b>')
}
function escapeHTML(html) {
return html.replace(/[&<>]/g, function(c) {
return '&#' + c.charCodeAt(0) + ';';
});
}
});
// tree.js ------------------------------------------------
Searchdoc.Tree = function(element, tree, panel) {
this.$element = $(element);
this.$list = $('ul', element);
this.tree = tree;
this.panel = panel;
this.init();
}
Searchdoc.Tree.prototype = $.extend({}, Searchdoc.Navigation, new function() {
this.init = function() {
var stopper = document.createElement('li');
stopper.className = 'stopper';
this.$list[0].appendChild(stopper);
for (var i=0, l = this.tree.length; i < l; i++) {
buildAndAppendItem.call(this, this.tree[i], 0, stopper);
};
var _this = this;
this.$list.click(function(e) {
var $target = $(e.target),
$li = $target.closest('li');
if ($target.hasClass('icon')) {
_this.toggle($li);
} else {
_this.select($li);
}
})
this.initNavigation();
if (jQuery.browser.msie) document.body.className += '';
}
this.select = function($li) {
this.highlight($li);
var path = $li[0].searchdoc_tree_data.path;
if (path) this.panel.open(path);
}
this.highlight = function($li) {
if (this.$current) this.$current.removeClass('current');
this.$current = $li.addClass('current');
}
this.toggle = function($li) {
var closed = !$li.hasClass('closed'),
children = $li[0].searchdoc_tree_data.children;
$li.toggleClass('closed');
for (var i=0, l = children.length; i < l; i++) {
toggleVis.call(this, $(children[i].li), !closed);
};
}
this.moveRight = function() {
if (!this.$current) {
this.highlight(this.$list.find('li:first'));
return;
}
if (this.$current.hasClass('closed')) {
this.toggle(this.$current);
}
}
this.moveLeft = function() {
if (!this.$current) {
this.highlight(this.$list.find('li:first'));
return;
}
if (!this.$current.hasClass('closed')) {
this.toggle(this.$current);
} else {
var level = this.$current[0].searchdoc_tree_data.level;
if (level == 0) return;
var $next = this.$current.prevAll('li.level_' + (level - 1) + ':visible:first');
this.$current.removeClass('current');
$next.addClass('current');
scrollIntoView($next[0], this.$element[0]);
this.$current = $next;
}
}
this.move = function(isDown) {
if (!this.$current) {
this.highlight(this.$list.find('li:first'));
return true;
}
var next = this.$current[0];
if (isDown) {
do {
next = next.nextSibling;
if (next && next.style && next.style.display != 'none') break;
} while(next);
} else {
do {
next = next.previousSibling;
if (next && next.style && next.style.display != 'none') break;
} while(next);
}
if (next && next.className.indexOf('stopper') == -1) {
this.$current.removeClass('current');
$(next).addClass('current');
scrollIntoView(next, this.$element[0]);
this.$current = $(next);
}
return true;
}
function toggleVis($li, show) {
var closed = $li.hasClass('closed'),
children = $li[0].searchdoc_tree_data.children;
$li.css('display', show ? '' : 'none')
if (!show && this.$current && $li[0] == this.$current[0]) {
this.$current.removeClass('current');
this.$current = null;
}
for (var i=0, l = children.length; i < l; i++) {
toggleVis.call(this, $(children[i].li), show && !closed);
};
}
function buildAndAppendItem(item, level, before) {
var li = renderItem(item, level),
list = this.$list[0];
item.li = li;
list.insertBefore(li, before);
for (var i=0, l = item[3].length; i < l; i++) {
buildAndAppendItem.call(this, item[3][i], level + 1, before);
};
return li;
}
function renderItem(item, level) {
var li = document.createElement('li'),
cnt = document.createElement('div'),
h1 = document.createElement('h1'),
p = document.createElement('p'),
icon, i;
li.appendChild(cnt);
li.style.paddingLeft = getOffset(level);
cnt.className = 'content';
if (!item[1]) li.className = 'empty ';
cnt.appendChild(h1);
// cnt.appendChild(p);
h1.appendChild(document.createTextNode(item[0]));
// p.appendChild(document.createTextNode(item[4]));
if (item[2]) {
i = document.createElement('i');
i.appendChild(document.createTextNode(item[2]));
h1.appendChild(i);
}
if (item[3].length > 0) {
icon = document.createElement('div');
icon.className = 'icon';
cnt.appendChild(icon);
}
// user direct assignement instead of $()
// it's 8x faster
// $(li).data('path', item[1])
// .data('children', item[3])
// .data('level', level)
// .css('display', level == 0 ? '' : 'none')
// .addClass('level_' + level)
// .addClass('closed');
li.searchdoc_tree_data = {
path: item[1],
children: item[3],
level: level
}
li.style.display = level == 0 ? '' : 'none';
li.className += 'level_' + level + ' closed';
return li;
}
function getOffset(level) {
return 5 + 18*level + 'px';
}
});