/* EventCalendar.  $Revision: 255 $

 * Copyright (C) 2005 2006, Alex Tingle.

 * This file is licensed under the GNU GPL. See LICENSE file for details.

 */

/** Register an onload function. */

function WindowOnload(f)

{

  var prev=window.onload;

  window.onload=function(){ if(prev)prev(); f(); }

}

/***

 ***  Set elsewhere: Ec3EditForm.event_cat_id

 ***                 Ec3EditForm.start_of_week

 ***/

// namespace

function Ec3EditForm()

{

  var fmt="%Y-%m-%d %H:%M";

  WindowOnload( function()

  {

    var ELEMENT_NODE=1;

    var TEXT_NODE=3;

    Ec3EditForm.fieldset_se=document.getElementById('ec3_schedule_editor');

    Ec3EditForm.rows=document.getElementById('ec3_rows');

    Ec3EditForm.catinput=document.getElementById(Ec3EditForm.event_cat_id);

    if(Ec3EditForm.fieldset_se && Ec3EditForm.rows && Ec3EditForm.catinput)

    {

      // Perform some sleight of hand....

      // What I WANT to do, is set Ec3EditForm.catinput to read only, however

      // that's not possible for a checkbox. Disabled is good, but disabled

      // checkboxes are never submitted with the form. So, we HIDE the real

      // checkbox, and make a new dummy one that is shown but disabled.

      Ec3EditForm.dummyinput=Ec3EditForm.catinput.cloneNode(true);

      Ec3EditForm.dummyinput.id='ec3_dummy';

      Ec3EditForm.dummyinput.name='ec3_dummy';

      Ec3EditForm.dummyinput.disabled=true;

      Ec3EditForm.catinput.parentNode.insertBefore(

        Ec3EditForm.dummyinput, Ec3EditForm.catinput

      );

      Ec3EditForm.catinput.style.display='none';

      update_category();

      add_row_listeners(Ec3EditForm.fieldset_se);

    }

  } );

  function add_row_listeners(e)

  {

    var buttons=e.getElementsByTagName('button');

    for(var i=0; i<buttons.length; i++)

      if(buttons[i].id.indexOf('trigger_ec3_')==0)

      {

        input_id=buttons[i].id.substr(8);

        input=document.getElementById(input_id);

        if(!input)

          continue;

        cal=Calendar.setup({

          inputField:input,

          ifFormat:fmt,

          showsTime:true,

          button:buttons[i].id,

          step:1,

          firstDay:Ec3EditForm.start_of_week,

          singleClick:false,

          onUpdate:cal_changed

        });

        try{

          input.setAttribute('ec3_date',

            Date.parseDate(input.value,fmt).getTime());

        } catch(e) {

          input.setAttribute('ec3_date',0);

        }

        firetree_addEvent(input,'change',on_changed);

      }

  }

  function update_category()

  {

    // Set both the real AND dummpy checkboxes to match Ec3EditForm.rows.

    if(Ec3EditForm.rows.value>0)

    {

      Ec3EditForm.catinput.checked=true;

      Ec3EditForm.dummyinput.checked=true;

    }

    else

    {

      Ec3EditForm.catinput.checked=false;

      Ec3EditForm.dummyinput.checked=false;

    }

  }

  Ec3EditForm.add_row=function()

  {

    // Get the second-from-last TR

    var trs=Ec3EditForm.fieldset_se.getElementsByTagName('tr');

    var tr=trs[trs.length-2];

    // Make a new row, based on it & add it into the table.

    var new_tr=tr.cloneNode(1);

    var selects=new_tr.getElementsByTagName('select'); 

    for(var i=0; i<selects.length; i++)

    {

      selects[i].name+=trs.length-3;

      selects[i].id=selects[i].name;

    }

    var inputs=new_tr.getElementsByTagName('input');                         

    for(var i=0; i<inputs.length; i++)

    {

      inputs[i].name+=trs.length-3;

      inputs[i].id=inputs[i].name;

    }

    var buttons=new_tr.getElementsByTagName('button');                         

    for(var i=0; i<buttons.length; i++)

    {

      buttons[i].id+=trs.length-3;

    }

    new_tr.style.display=trs[0].style.display;

    tr.parentNode.insertBefore(new_tr,tr);

    Ec3EditForm.rows.value++;

    update_category();

    add_row_listeners(new_tr);

  }

  Ec3EditForm.del_row=function(element)

  {

    tr=element.parentNode.parentNode.parentNode;

    var inputs=tr.getElementsByTagName('input');

    for(var i=0; i<inputs.length; i++)

      if(0 == inputs[i].name.indexOf('ec3_action_'))

      {

        inputs[i].value='delete';

        break;

      }

    tr.style.display='none';

    Ec3EditForm.rows.value--;

    update_category();

  }

  function on_changed(e)

  {

    var input;

    if(e.currentTarget)

        input=e.currentTarget; // Mozilla/Safari/w3c

    else if(window.event)

        input=window.event.srcElement; // IE

    else

        return;

    input_changed(input);

  }

  function input_changed(input)

  {

    if(input.id.indexOf('ec3_start_')>=0)

    {

      // Change the end time to preserve the event duration.

      var start=input;

      var end=document.getElementById(start.id.replace('_start_','_end_'));

      var start_date0=parseInt(start.getAttribute('ec3_date'));

      var end_date0=parseInt(end.getAttribute('ec3_date'));

      var start_date1=Date.parseDate(start.value,fmt).getTime();

      start.setAttribute('ec3_date',start_date1);

      var delta=start_date1 - start_date0;

      var end_date1=end_date0+delta;

      end.setAttribute('ec3_date',end_date1);

      end.value=(new Date(end_date1)).print(fmt);

    }

    else if(input.id.indexOf('ec3_end_')>=0)

    {

      // Make sure that the start time is before the end time.

      var start=document.getElementById(input.id.replace('_end_','_start_'));

      var end=input;

      var start_date0=parseInt(start.getAttribute('ec3_date'));

      var end_date0=parseInt(end.getAttribute('ec3_date'));

      var end_date1=Date.parseDate(end.value,fmt).getTime();

      end.setAttribute('ec3_date',end_date1);

      if(start_date0>end_date1)

      {

        var start_date1=end_date1;

        start.setAttribute('ec3_date',start_date1);

        start.value=(new Date(start_date1)).print(fmt);

      }

    }

  }

  function cal_changed(cal)

  {

    input_changed(cal.params.inputField);

  }

} // end namespace Ec3EditForm

// Export public functions from namespace.

Ec3EditForm();