moodle/lib/ajax/section-resource_classes.js

670 lines
23 KiB
JavaScript
Executable File

/*
* library for ajaxcourse formats, the classes and related functions for sections and resources
* this library requires a 'main' object created in calling document
*/
function section_class(id,group,config,isDraggable){
this.init_section(id,group,config,isDraggable);
}
YAHOO.extend(section_class, YAHOO.util.DDProxy);
section_class.prototype.debug = false;
section_class.prototype.init_section = function(id, group,config,isDraggable){
if (!id) { return; }
this.is = 'section';
this.sectionId = null;
if(!isDraggable){
this.initTarget(id,group,config);
this.removeFromGroup('sections');
}else{
this.init(id,group,config);
this.handle = null;
}
this.createFrame();
this.isTarget = true;
this.resources = [];
this.numberDisplay = null;
this.summary = null;
this.content_td = null;
this.hidden = false;
this.highlighted = false;
this.showOnly = false;
this.resources_ul = null;
this.process_section();
this.viewButton = null;
this.highlightButton = null;
this.showOnlyButton = null;
this.init_buttons();
if(isDraggable)this.add_handle();
if(this.debug)YAHOO.log("init_section "+id+" draggable="+isDraggable);
if(YAHOO.util.Dom.hasClass(this.getEl(),'hidden'))
this.toggle_hide(null,null,true);
}
section_class.prototype.init_buttons = function(){
var commandContainer = this.getEl().childNodes[2];
//clear all but show only button
var commandContainerCount = commandContainer.childNodes.length;
for(var i=(commandContainerCount-1);i>0;i--)
commandContainer.removeChild(commandContainer.childNodes[i])
if(!this.isWeekFormat){
var highlightbutton = main.mk_button('div','/pix/i/marker.gif');
YAHOO.util.Event.addListener(highlightbutton,'click',this.mk_marker,this,true);
commandContainer.appendChild(highlightbutton);
this.highlightButton = highlightbutton;
}
var viewbutton = main.mk_button('div','/pix/i/hide.gif');
YAHOO.util.Event.addListener(viewbutton,'click',this.toggle_hide,this,true);
commandContainer.appendChild(viewbutton);
this.viewButton = viewbutton;
}
section_class.prototype.add_handle = function(){
var handleRef = main.mk_button('div','/pix/i/move_2d.gif',[['style','cursor:move']]);
YAHOO.util.Dom.generateId(handleRef,'sectionHandle');
this.handle = handleRef;
this.getEl().childNodes[0].appendChild(handleRef);
this.setHandleElId(this.handle.id);
}
section_class.prototype.process_section = function(){
this.content_td = this.getEl().childNodes[1];
if(YAHOO.util.Dom.hasClass(this.getEl(),'current')){
this.highlighted = true;
main.marker = this;
}
//create holder for display number for access later
this.numberDisplay = document.createElement('div');
this.numberDisplay.innerHTML = this.getEl().childNodes[0].innerHTML;
this.getEl().childNodes[0].innerHTML = '';
this.getEl().childNodes[0].appendChild(this.numberDisplay);
this.sectionId = this.numberDisplay.innerHTML;
if(this.debug)YAHOO.log("Creating section "+this.getEl().id+" in position "+this.sectionId);
//find/edit resources
this.resources_ul = this.content_td.getElementsByTagName('ul')[0];
if(this.resources_ul == null){
this.resources_ul = document.createElement('ul');
this.resources_ul.className='section';
this.content_td.insertBefore(this.resources_ul,this.content_td.childNodes[1]);
}
var resource_count = this.resources_ul.getElementsByTagName('li').length;
for(var i=0;i<resource_count;i++){
var resource = this.resources_ul.getElementsByTagName('li')[i];
if(YAHOO.util.Dom.hasClass(resource,'resource')){
this.resources[this.resources.length] = new resource_class(resource.id,'resources',null,this);
if(this.debug)YAHOO.log("Found resource");
}else{
this.resources[this.resources.length] = new activity_class(resource.id,'resources',null,this);
}
}
this.summary = YAHOO.util.Dom.getElementsByClassName('summary',null,this.getEl())[0].firstChild.data || '';
}
section_class.prototype.startDrag = function(x, y) {
//operates in point mode
YAHOO.util.DDM.mode = YAHOO.util.DDM.POINT;
//remove from resources group temporarily
this.removeFromGroup('resources');
//reinitialize dd element
this.getDragEl().innerHTML = '';
var targets = YAHOO.util.DDM.getRelated(this, true);
if(this.debug)YAHOO.log(this.sectionId + " startDrag "+targets.length + " targets");
}
section_class.prototype.onDragDrop = function(e, id) {
// get the drag and drop object that was targeted
var target = YAHOO.util.DDM.getDDById(id);
if(this.debug)YAHOO.log("Section dropped on id="+id+" el = "+this.getEl().id+" x="+YAHOO.util.Dom.getXY(this.getDragEl()));
this.move_to_section(target);
//add back to resources group
this.addToGroup('resources');
}
section_class.prototype.endDrag = function(){
//nessicary to defeat default action
//add back to resources group
this.addToGroup('resources');
}
section_class.prototype.move_to_section = function(target){
var tempTd = document.createElement('td');
var tempStore = null;
var sectionCount = main.sections.length;
var found = null;
//determine if original is above or below target and adjust loop
var oIndex=main.get_section_index(this);
var tIndex=main.get_section_index(target);
if(this.debug)YAHOO.log("original is at: "+oIndex+" target is at:"+tIndex+" of "+(sectionCount-1));
if(oIndex < tIndex){
var loopCondition = 'i<sectionCount';
var loopStart = 1;
var loopInc = 'i++';
var loopmodifier = 'i-1';
}else{
var loopCondition = 'i>0';
var loopStart = sectionCount-1;
var loopInc = 'i--';
var loopmodifier = 'i+1';
}
//move on backend
main.connect('post','class=section&field=move',null,'id='+this.sectionId+'&value='+(target.sectionId-this.sectionId));
//move on front end
for(var i=loopStart;eval(loopCondition);eval(loopInc)){
if((main.sections[i] == this)&& !found){
//enounter with original node
if(this.debug)YAHOO.log("Found Original "+main.sections[i].getEl().id);
if(main.sections[i] == this){
found = true;
}
}else if(main.sections[i] == target){
//encounter with target node
if(this.debug)YAHOO.log("Found target "+main.sections[i].getEl().id);
main.sections[i].swap_with_section(main.sections[eval(loopmodifier)]);
found = false;
break;
}else if(found){
//encounter with nodes inbetween
main.sections[i].swap_with_section(main.sections[eval(loopmodifier)]);
}
}
}
section_class.prototype.swap_with_section = function(sectionIn){
var tmpStore = null;
thisIndex = main.get_section_index(this);
targetIndex = main.get_section_index(sectionIn);
main.sections[targetIndex] = this;
main.sections[thisIndex] = sectionIn;
this.changeId(targetIndex);
sectionIn.changeId(thisIndex);
if(this.debug)YAHOO.log("Swapping "+this.getEl().id+" with "+sectionIn.getEl().id);
YAHOO.util.DDM.swapNode(this.getEl(),sectionIn.getEl());
}
section_class.prototype.toggle_hide = function(e,target,superficial){
if(this.hidden){
YAHOO.util.Dom.removeClass(this.getEl(),'hidden');
this.viewButton.childNodes[0].src = this.viewButton.childNodes[0].src.replace(/show.gif/i,'hide.gif');
this.hidden = false;
if(!superficial){
main.connect('post','class=section&field=visible',null,'value=1&id='+this.sectionId);
for(var x=0;x<this.resources.length;x++){
this.resources[x].toggle_hide(null,null,true,this.resources[x].hiddenStored);
this.resources[x].hiddenStored = null;
}
}
}else{
YAHOO.util.Dom.addClass(this.getEl(),'hidden');
this.viewButton.childNodes[0].src = this.viewButton.childNodes[0].src.replace(/hide.gif/i,'show.gif');
this.hidden = true;
if(!superficial){
main.connect('post','class=section&field=visible',null,'value=0&id='+this.sectionId);
for(var x=0;x<this.resources.length;x++){
this.resources[x].hiddenStored = this.resources[x].hidden;
this.resources[x].toggle_hide(null,null,true,true);
}
}
}
}
section_class.prototype.toggle_highlight = function(){
if(this.highlighted){
YAHOO.util.Dom.removeClass(this.getEl(),'current');
this.highlighted = false;
}else{
YAHOO.util.Dom.addClass(this.getEl(),'current');
this.highlighted = true;
}
}
section_class.prototype.mk_marker = function(){
if(main.marker != this){
main.update_marker(this);
}else{//if currently the marker
main.marker = null;
main.connect('post','class=course&field=marker',null,'value=0');
this.toggle_highlight();
}
}
section_class.prototype.changeId = function(newId){
this.sectionId = newId;
this.numberDisplay.firstChild.data = newId;
//main.connectQueue_add('post','class=section&field=all',null,'id='+newId+"&summary="+main.mk_safe_for_transport(this.summary)+"&sequence="+this.write_sequence_list(true)+'&visible='+(this.hidden?0:1))
if(main.marker == this)
main.update_marker(this);
}
section_class.prototype.get_resource_index = function(el){
for(var x=0;x<this.resources.length;x++)
if(this.resources[x]==el)
return x;
YAHOO.log("Could not find resource to remove "+el.getEl().id,"error");
return -1;
}
section_class.prototype.remove_resource = function(el){
var resourceCount = this.resources.length;
if(resourceCount == 1){
if(this.resources[0] == el)
this.resources = new Array();
}else{
var found = false;
for(var i=0;i<resourceCount;i++){
if(found){
this.resources[i-1] = this.resources[i];
if(i==resourceCount-1){
this.resources = this.resources.slice(0,-1);
resourceCount--;
}
this.resources[i-1].update_index(i-1);
}else if(this.resources[i]==el){
found = true;
}
}
}
//remove "text" nodes to keep DOM clean
var childIndex = null;
var childrenCount = this.resources_ul.childNodes.length;
for(var i=0;i<childrenCount;i++)
if(this.resources_ul.childNodes[i] == el.getEl())
childIndex = i;
if(childIndex > 0 && childIndex < this.resources_ul.childNodes.length)
this.resources_ul.removeChild(this.resources_ul.childNodes[childIndex-1]);
YAHOO.log("removing "+el.getEl().id);
if(el.getEl().parentNode != null)
el.getEl().parentNode.removeChild(el.getEl());
this.write_sequence_list();
}
section_class.prototype.insert_resource = function(el,targetel){
var resourcecount = this.resources.length;
var found = false;
var tempStore = nextStore = null;
//update in backend
targetId='';
if(targetel !=null){
targetId=targetel.id;
}
main.connect('post','class=resource&field=move',null,'id='+el.id+'&beforeId='+targetId+'&sectionId='+this.sectionId);
//if inserting into a hidden resource hide
if(this.hidden){
el.hiddenStored = el.hidden;
el.toggle_hide(null,null,true,true);
}else{
if(el.hiddenStored != null){
el.toggle_hide(null,null,true,el.hiddenStored);
el.hiddenStored = null;
}
}
//update model
if(targetel == null){
this.resources[this.resources.length] = el;
}else
for(var i=0;i<resourcecount;i++){
if(found){
tempStore = this.resources[i];
this.resources[i] = nextStore;
nextStore = tempStore;
if(nextStore != null)
nextStore.update_index(i+1);
}else if(this.resources[i] == targetel){
found = true;
nextStore = this.resources[i];
this.resources[i] = el;
resourcecount++;
this.resources[i].update_index(i,this.ident);
nextStore.update_index(i+1);
}
}
//update on frontend
if(targetel != null){
this.resources_ul.insertBefore(el.getEl(),targetel.getEl());
this.resources_ul.insertBefore(document.createTextNode(''),targetel.getEl());
}else{
this.resources_ul.appendChild(el.getEl());
this.resources_ul.appendChild(document.createTextNode(" "));
}
el.parentObj = this;
}
section_class.prototype.write_sequence_list = function(toReturn){
var listOutput = '';
for(var i=0;i<this.resources.length;i++){
listOutput += this.resources[i].id;
if(i != (this.resources.length-1))
listOutput += ',';
}
if(toReturn)
return listOutput;
}
/*
* Resource Class extends util.DDProxy
*/
function resource_class(id,group,config,parentObj){
this.init_resource(id,group,config,parentObj);
}
YAHOO.extend(resource_class, YAHOO.util.DDProxy);
resource_class.prototype.debug = true;
resource_class.prototype.init_resource = function(id,group,config,parentObj){
if (!id) {
YAHOO.log("Init resource, NO ID FOUND!",'error');
return;
}
this.is = 'resource';
this.init(id,group,config);
this.createFrame();
this.isTarget = true;
this.id = this.getEl().id.replace(/module-/i,'');
this.hidden = false;
if(YAHOO.util.Dom.hasClass(this.getEl().getElementsByTagName('a')[0],'dimmed'))
this.hidden = true;
this.hiddenStored = null;
this.linkContainer = this.getEl().getElementsByTagName('a')[0];
this.commandContainer = null;
this.viewButton = null;
this.handle = null;
this.init_buttons();
this.parentObj = parentObj;
if(this.debug)YAHOO.log("init_resource "+id+" parent = "+parentObj.getEl().id);
}
resource_class.prototype.init_buttons = function(){
var commandContainer = YAHOO.util.Dom.getElementsByClassName('commands','span',this.getEl())[0];
if( commandContainer == null){
YAHOO.log('Cannot find command container for '+this.getEl().id,'error');
return;
}
this.commandContainer = commandContainer;
//find edit button
var updateButton = null;
var buttons = commandContainer.getElementsByTagName('a');
for(var x=0;x<buttons.length;x++)
if(buttons[x].title == 'Update')
updateButton = buttons[x];
if(updateButton == null)
YAHOO.log('Cannot find updateButton for '+this.getEl().id,'error');
commandContainer.innerHTML = '';
//add move-handle
var handleRef = main.mk_button('a','/pix/i/move_2d.gif',[['style','cursor:move']],[['height','11'],['width','11'],['hspace','2'],['border','0']]);
YAHOO.util.Dom.generateId(handleRef,'sectionHandle');
this.handle = handleRef;
commandContainer.appendChild(handleRef);
this.setHandleElId(this.handle.id);
//add edit button back in
commandContainer.appendChild(updateButton);
//add rest
var button = main.mk_button('a','/pix/t/delete.gif');
YAHOO.util.Event.addListener(button,'click',this.delete_button,this,true);
commandContainer.appendChild(button);
if(this.hidden)
var button = main.mk_button('a','/pix/t/show.gif');
else
var button = main.mk_button('a','/pix/t/hide.gif');
YAHOO.util.Event.addListener(button,'click',this.toggle_hide,this,true);
commandContainer.appendChild(button);
this.viewButton = button;
}
resource_class.prototype.toggle_hide = function(target,e,superficial,force){
if(force != null){
if(this.debug)YAHOO.log("Resource "+this.getEl().id+" forced to "+force);
this.hidden = !force;
}
if(this.hidden){
YAHOO.util.Dom.removeClass(this.linkContainer,'dimmed');
this.viewButton.childNodes[0].src = this.viewButton.childNodes[0].src.replace(/show.gif/i,'hide.gif');
this.hidden = false;
if(!superficial){
main.connect('post','class=resource&field=visible',null,'value=1&id='+this.id);
}
}else{
YAHOO.util.Dom.addClass(this.linkContainer,'dimmed');
this.viewButton.childNodes[0].src = this.viewButton.childNodes[0].src.replace(/hide.gif/i,'show.gif');
this.hidden = true;
if(!superficial){
main.connect('post','class=resource&field=visible',null,'value=0&id='+this.id);
}
}
}
resource_class.prototype.delete_button = function(){
if(this.debug)YAHOO.log("Deleteing "+this.getEl().id+"from parent "+this.parentObj.getEl().id);
this.getEl().parentNode.removeChild(this.getEl());
this.parentObj.remove_resource(this);
main.connect('delete','class=resource&id='+this.id);
}
resource_class.prototype.update_index = function(index){
if(this.debug)YAHOO.log("update Index for resource "+this.getEl().id+"to"+index);
}
resource_class.prototype.startDrag = function(x, y) {
//operates in intersect mode
YAHOO.util.DDM.mode = YAHOO.util.DDM.INTERSECT;
//reinitialize dd element
this.getDragEl().innerHTML = '';
var targets = YAHOO.util.DDM.getRelated(this, true);
if(this.debug)YAHOO.log(this.id + " startDrag "+targets.length + " targets");
}
resource_class.prototype.onDragDrop = function(e, ids) {
// best fit Id
var id=[];
for(var i=0;i<ids.length;i++)
if(ids[i].is == 'resource')
id[id.length] = ids[i];
if(id.length == 0)
id = ids;
// get the drag and drop object that was targeted
var target = YAHOO.util.DDM.getBestMatch(id);
if(this.debug)YAHOO.log("dropped on id="+target+" el = "+this.getEl().id+" x="+YAHOO.util.Dom.getXY(this.getDragEl()));
this.parentObj.remove_resource(this);
if(target.is == 'resource'||target.is == 'activity'){
target.parentObj.insert_resource(this,target);
}else if(target.is =='section'){
target.insert_resource(this);
}
return;
}
resource_class.prototype.endDrag = function() {
//eliminates default action
}
/*
* activity Class extends resource class
*/
function activity_class(id,group,config,parentObj){
this.init_activity(id,group,config,parentObj);
}
YAHOO.extend(activity_class, resource_class);
activity_class.prototype.init_activity = function(id,group,config,parentObj){
if (!id) {
YAHOO.log("Init activity, NO ID FOUND!",'error');
return;
}
this.is = 'activity';
this.currentGroup = this.get_current_group(id);
this.init_resource(id,group,config,parentObj);
this.groupButton= null;
this.init_activity_button();
if(this.debug)YAHOO.log("--init_activity "+id);
}
activity_class.prototype.groupImages = ['/pix/t/groupn.gif','/pix/t/groups.gif','/pix/t/groupv.gif'];
activity_class.prototype.init_activity_button = function(){
var button = main.mk_button('a',this.groupImages[this.currentGroup]);
YAHOO.util.Event.addListener(button,'click',this.toggle_group,this,true);
this.commandContainer.appendChild(button);
this.groupButton = button;
}
activity_class.prototype.get_current_group = function(id){
if(document.getElementById(id) == null){
return;
}
var groupNodeArray = document.getElementById(id).getElementsByTagName('a');
var groupNode = groupNodeArray[groupNodeArray.length-1];
for(var x=0;x<this.groupImages.length;x++){
if(main.portal.wwwroot+this.groupImages[x] == groupNode.getElementsByTagName('img')[0].src){
return x;
}
}
return 0;
}
activity_class.prototype.toggle_group = function(){
this.currentGroup++;
if(this.currentGroup > 2)
this.currentGroup = 0;
this.groupButton.getElementsByTagName('img')[0].src = main.portal.wwwroot + this.groupImages[this.currentGroup];
main.connect('post','class=resource&field=groupmode',null,'value='+this.currentGroup+'&id='+this.id);
}