/* Clearly, all this is stolen from delicious */

function set(val){$id('formtitle').value=val;}


String.prototype.trim = function(){ return this.replace(/^\s+|\s+$/g,'') }
String.prototype.unescHtml = function(){ var i,e={'&lt;':'<','&gt;':'>','&amp;':'&','&quot;':'"'},t=this; for(i in e) t=t.replace(new RegExp(i,'g'),e[i]); return t }

// styling functions
function isA(o,klass){ if(!o.className) return false; return new RegExp('\\b'+klass+'\\b').test(o.className) }
function addClass(o,klass){ if(!isA(o,klass)) o.className += ' ' + klass }
function rmClass(o,klass){ o.className = o.className.replace(new RegExp('\\s*\\b'+klass+'\\b'),'') }
function swapClass(o,klass,klass2){ var swap = isA(o,klass) ? [klass,klass2] : [klass2,klass]; rmClass(o,swap[0]); addClass(o,swap[1]) }
function getStyle(o,s) {
	if (document.defaultView && document.defaultView.getComputedStyle) return document.defaultView.getComputedStyle(o,null).getPropertyValue(s)
	else if (o.currentStyle) { return o.currentStyle[s.replace(/-([^-])/g, function(a,b){return b.toUpperCase()})] }
}
// shorter names for grabbing stuff
function $id(id){ return document.getElementById(id) }
function $tags(t,o){ o=o||document; return o.getElementsByTagName(t) }
function $tag(t,o,i) { o=o||document; return o.getElementsByTagName(t)[i||0] }
// get elements by class name, eg $c('post', document, 'li')
function $c(c,o,t) { o=o||document;
	if (!o.length) o = [o]
	else if(o.length == 1 && !o[0]) o = [o] // opera, you're weird
	var elements = []
	for(var i = 0, e; e = o[i]; i++) {
		if(e.getElementsByTagName) {
			var children = e.getElementsByTagName(t || '*')
			for (var j = 0, child; child = children[j]; j++) if(isA(child,c)) elements.push(child)
	}}
	return elements
}

Function.prototype.bind = function(o) {
	var __method = this
	return function() { return __method.apply(o, arguments) }
}

String.prototype.escRegExp = function(){ return this.replace(/[\\$*+?()=!|,{}\[\]\.^]/g,'\\$&') }
String.prototype.unescHtml = function(){ var i,t=this; for(i in e) t=t.replace(new RegExp(i,'g'),e[i]); return t }
function Suggestions() { this.length=0; this.picked=0 }
var suggestions = new Suggestions()
var tagSearch='', lastEdit=''
var h={}, sections=[{},{},{},{},{},{}], selected={}, currentTag={}, e={'&lt;':'<','&gt;':'>','&amp;':'&','&quot;':'"'}

function init() { var elements = ['alpha','copy','freq', 'network'], divs={}, freqSort=[], freqMap={}, t,i

        for(i in elements) divs[elements[i]] = makeDiv(elements[i] + 'tags')
        elements = elements.concat('suggest','tags','alphasort','freqsort')
        for(i in elements) h[elements[i]] = $id(elements[i])
        for(t in tags) {
                if (!freqMap[tags[t]]) { freqMap[tags[t]] = {}; freqSort[freqSort.length] = tags[t] }
                freqMap[tags[t]][t] = true;
                sections[0][t.toLowerCase()] = makeTag(divs.alpha, t, 'swap')
        }
        freqSort.sort(function(a,b){return b-a})
        for(i in freqSort) {
                for(t in freqMap[freqSort[i]]) {
                        tagSearch += t + ' '
        }}
        for(t in copytags) { t = copytags[t]
                sections[4][t.toLowerCase()] = makeTag(divs.copy, t, 'swap')
                if(!sections[0][t]) tagSearch += t + ' '
        }
        if(copytags.length > 0) {
                h.copy.style.display = 'block'
                h.copy.appendChild(divs.copy)
        }
        if(freqSort.length > 0) {
                h.alpha.appendChild(divs.alpha); 
        }
/*        document.onkeydown = document.onkeypress = document.onkeyup = handler
        updateHilight()
*/
/*        if ($id('formtitle')) { focusTo($id('formtitle'),0) } */
}

function makeDiv(id) { var obj=document.createElement('div'); obj.id=id; return obj }

function makeTag(parent, tag, js) {
        parent.appendChild(document.createTextNode(' '))
        var obj = document.createElement('a')
        obj.className = 'tag'
        obj.setAttribute('href','javascript:'+js+'("'+tag.replace(/"/g,'\\"')+'")')
        obj.appendChild(document.createTextNode(tag))
        if(tags[tag] < 4) obj.className += ' uncommon'
        if(tags[tag] < 2) obj.style.color = '#66f'
        if(tags[tag] == 2) obj.style.color = '#44f'
        parent.appendChild(obj)
        return obj
}

function select(t) { var i; t=t.toLowerCase()
        selected[t] = true; for(i in sections) if(sections[i][t]) addClass(sections[i][t], 'selected')
}
function deselect(t) { var i; t=t.toLowerCase()
        delete selected[t]; for(i in sections) if(sections[i][t]) rmClass(sections[i][t], 'selected')
}

function swap(tag){
        var tagArray = h.tags.value.trim().split(' '), present=false, t, tl=tag.toLowerCase()
        if (tagArray[0].trim() == '') tagArray.splice(0,1);
        for (t=0; t<tagArray.length; t++) {
                if (tagArray[t].toLowerCase() == tl) { tagArray.splice(t,1); deselect(tag); present=true; t-=1  }
        }
        if (!present) { tagArray.push(tag); select(tag) }
        var content = tagArray.join(' ')
        lastEdit = h.tags.value = (content.length > 1) ? content + ' ' : content
        hideSuggestions()
        focusTo(h.tags)
}

function complete(tag) { var tagArray=h.tags.value.split(' ')
        if(typeof tag == 'undefined') tag = suggestions[suggestions.picked].innerHTML.unescHtml() // tab complete rather than click complete
        tagArray[currentTag.index] = tag
        var text = tagArray.join(' ')
        h.tags.value = (text.substr(-1,1) == ' ' ? text : text + ' ' )
        hideSuggestions()
        updateHilight()
        focusTo(h.tags)
        $id("tags").blur();   //hack to "wake up" safari
        $id("tags").focus();
}

// focus the caret to end of a form input (+ optionally select some text)
var range=0 //ie
function focusTo(obj, selectFrom) {
        if (typeof selectFrom == 'undefined') selectFrom = obj.value.length
        if(obj.createTextRange){ //ie + opera
                if (range == 0) range = obj.createTextRange()
                range.moveEnd("character",obj.value.length)
                range.moveStart("character",selectFrom)
                //obj.select()
                //range.select()
                setTimeout('range.select()', 10)
        } else if (obj.setSelectionRange){ //ff
                obj.select()
                obj.setSelectionRange(selectFrom,obj.value.length)
        } else { //safari :(
        obj.blur()
}}

function sort(text) { 
         var lists=['alpha','freq'], l
         for(l in lists) { l = lists[l]
//                  h[l].style.display = (l == text) ? 'inline' : 'none'
                 h[l + 'sort'].className = (l == text) ? 'noclicky' : 'clicky'
         }
  var i, uncommon
  uncommon = $c('uncommon',document,'a')
  for (i in uncommon){i=uncommon[i]
    i.style.display= ('alpha' == text) ? 'inline' : 'none'
  }



}

function updateHilight() { var tagArray=h.tags.value.toLowerCase().split(' '), tagHash={}
        if (tagArray[0].trim() == '') tagArray.splice(0,1);
        for (t in tagArray) {
                if(tagArray[t] != '') {
                        select(tagArray[t])
                        tagHash[tagArray[t]] = true
        }}
        for (t in selected) {if (!tagHash[t]) deselect(t)}
        return [tagArray, tagHash]
}

function hideSuggestions() { h.suggest.parentNode.parentNode.style.visibility='hidden' }
function showSuggestions() { suggest(0); h.suggest.parentNode.parentNode.style.visibility='visible' }

function updateSuggestions() {
        if(!getCurrentTag() || !currentTag.text) { hideSuggestions(); return false }

        while (h.suggest.hasChildNodes()) h.suggest.removeChild(h.suggest.firstChild)
        delete suggestions; suggestions = new Suggestions();
        var tagArray = h.tags.value.toLowerCase().split(' '), txt=currentTag.text.escRegExp(), tagHash={}, t
        for(t in tagArray) tagHash[tagArray[t]] = true

        var search = tagSearch.match(new RegExp(("(?:^| )("+txt+"[^ ]+)"), "gi"))
        if(search){
                for (i=0; i<search.length && suggestions.length<10; i++) {
                        tl = search[i].trim()
                        if(tagHash[tl])  continue // do not suggest already typed tag
                        suggestions[suggestions.length] = makeTag(h.suggest, tl, 'complete')
                        suggestions.length++
        }}
        if (suggestions.length > 0) showSuggestions()
        else hideSuggestions()
}

function suggest(index) {
        if(suggestions.length == 1) index = 0
        if(suggestions[suggestions.picked]) suggestions[suggestions.picked].className = 'tag'
        suggestions[suggestions.picked = index].className = 'tag selected'
}

function getCurrentTag() {
        if(h.tags.value == lastEdit) return true // no edit
        if(h.tags == '') return false
        currentTag = {}
        var tagArray=h.tags.value.toLowerCase().split(' '), oldArray=lastEdit.toLowerCase().split(' '), currentTags = [], matched=false, t,o
        for (t in tagArray) {
                for (o in oldArray) {
                        if(typeof oldArray[o] == 'undefined') { oldArray.splice(o,1); break }
                        if(tagArray[t] == oldArray[o]) { matched = true; oldArray.splice(o,1); break; }
                }
                if(!matched) currentTags[currentTags.length] = t
                matched=false
        }
        // more than one word changed... abort
        if(currentTags.length > 1) { hideSuggestions(); return false }
        currentTag = { text:tagArray[currentTags[0]], index:currentTags[0] }
        return true
}

function handler(event) { var e=(event||window.event) //w3||ie
        if (e.type == 'keydown') {
                if(suggestions.length > 0) {
                        switch(e.keyCode) {
                                case 38: suggest((suggestions.picked + 1) % suggestions.length); break
                                case 40: suggest(suggestions.picked == 0 ? suggestions.length - 1 : suggestions.picked - 1); break
                                
        }}} else if (e.type == 'keypress') {
                switch(e.keyCode){
                        case 38: case 40: 
                                if(e.preventDefault && e.originalTarget) e.preventDefault() //ff
                                break;
                        case 9: // tab
                                if (e.preventDefault && h.suggest.parentNode.parentNode.style.visibility == 'visible') { //ff
                                        complete()
                                        e.preventDefault()
                                }
                                break;
                        case 34432: //case 13: // enter
                        if (h.suggest.parentNode.parentNode.style.visibility == 'hidden') {
                                submitForm();
                                } else {
                        
                                if (e.preventDefault && h.suggest.parentNode.parentNode.style.visibility == 'visible') { //ff
                                        complete()
                                        e.preventDefault()
                                        
                                }; 
                                };
                                
                                return false;
                                break;
                        default: lastEdit = h.tags.value
        }} else if (e.type == 'keyup') {
                updateHilight()
                switch(e.keyCode) {
                        //case 8:  //backspace
                        //case 46: //delete
                        case 35: //end
                        case 36: //home
                        case 39: // right
                        case 37: // left
                        case 32: // space
                                hideSuggestions(); break
                        case 38: case 40: break;
                        case 9:
                                if(!e.preventDefault && h.suggest.parentNode.parentNode.style.visibility == 'visible') complete() //ie
                                break;
                        // case 1432234432: case 13:
                        if (h.suggest.parentNode.parentNode.style.visibility == 'hidden') {
                                } else {
                                if(!e.preventDefault && h.suggest.parentNode.parentNode.style.visibility == 'visible'){
                                        complete();
                                };
                                }
                                
                                return false;
                                break;
                        default: updateSuggestions()
}}}