// Javascript routines for the page editor

// Idle time required for autosave, in seconds

var AUTOSAVE_TIMEOUT = 15;

var AutosaveTimeoutObj = null;

var editor_img_path = cdnPath + '/images/editor';

var editor_save_lock = false;

var editor_wikitext_transform_enable = true;

window.ajaxEditor = function(revid)

{

  if ( KILL_SWITCH )

    return true;

  if ( editor_open )

    return true;

  load_component(['l10n', 'template-compiler', 'messagebox', 'fadefilter', 'flyin']);

  selectButtonMinor('edit');

  selectButtonMajor('article');

  setAjaxLoading();

  var rev_id_uri = ( revid ) ? '&revid=' + revid : '';

  ajaxGet(stdAjaxPrefix + '&_mode=getsource' + rev_id_uri, function(ajax)

    {

      if ( ajax.readyState == 4 && ajax.status == 200 )

      {

        unsetAjaxLoading();

        var response = String(ajax.responseText + '');

        if ( !check_json_response(response) )

        {

          handle_invalid_json(response);

          return false;

        }

        response = parseJSON(response);

        if ( response.mode == 'error' )

        {

          unselectAllButtonsMinor();

          new MessageBox(MB_OK | MB_ICONSTOP, $lang.get('editor_err_server'), response.error);

          return false;

        }

        if ( !response.auth_view_source )

        {

          unselectAllButtonsMinor();

          new MessageBox(MB_OK | MB_ICONSTOP, $lang.get('editor_err_access_denied_title'), $lang.get('editor_err_access_denied_body'));

          return false;

        }

        // do we need to enter a captcha before saving the page?

        var captcha_hash = ( response.require_captcha ) ? response.captcha_id : false;

        ajaxBuildEditor((!response.auth_edit), response.time, response.allow_wysiwyg, captcha_hash, response.revid, response.undo_info, response);

      }

    });

}

window.ajaxBuildEditor = function(readonly, timestamp, allow_wysiwyg, captcha_hash, revid, undo_info, response)

{

  // Set flags

  // We don't want the fancy confirmation framework to trigger if the user is only viewing the page source

  if ( !readonly )

  {

    editor_open = true;

    disableUnload();

  }

  // Destroy existing contents of page container

  if ( editor_use_modal_window )

  {

    darken(true, 70, 'enano_editor_darkener');

    // Build a div with 80% width, centered, and 10px from the top of the window

    var edcon = document.createElement('div');

    edcon.style.position = 'absolute';

    edcon.style.backgroundColor = '#FFFFFF';

    edcon.style.padding = '10px';

    edcon.style.width = '80%';

    edcon.style.zIndex = getHighestZ() + 1;

    edcon.id = 'ajaxEditContainerModal';

    // Positioning

    var top = getScrollOffset() + 10;

    var left = ( getWidth() / 10 ) - 10; // 10% of window width on either side - 10px for padding = perfect centering effect

    edcon.style.top = String(top) + 'px';

    edcon.style.left = String(left) + 'px';

    var body = document.getElementsByTagName('body')[0];

    // Set opacity to 0

    domObjChangeOpac(0, edcon);

    body.appendChild(edcon);

  }

  else

  {

    var edcon = document.getElementById('ajaxEditContainer');

    for ( var i = edcon.childNodes.length - 1; i >= 0; i-- )

    {

      edcon.removeChild(edcon.childNodes[i]);

    }

  }

  var content = response.src;

  //

  // BUILD EDITOR

  //

  var heading = document.createElement('h3');

  heading.style.cssFloat = 'left';

  heading.style.styleFloat = 'left';

  heading.style.marginTop = '0px';

  heading.style.marginBottom = '0px';

  heading.appendChild(document.createTextNode($lang.get('editor_msg_editor_heading')));

  // Plaintext/wikitext toggler

  // Only build the editor if using TinyMCE is allowed. THIS IS WEAK

  // AND CANNOT BE MADE ANY STRONGER.

  if ( allow_wysiwyg )

  {

    var toggler = document.createElement('p');

    toggler.style.marginLeft = '0';

    toggler.style.textAlign = 'right';

    var span_wiki = document.createElement('span');

    var span_mce  = document.createElement('span');

    span_wiki.id  = 'enano_edit_btn_pt';

    span_mce.id   = 'enano_edit_btn_mce';

    // to-wikitext button

    var a = document.createElement('a');

    a.href = '#';

    a.className = 'abutton image abutton_green';

    a.appendChild(gen_sprite(scriptPath + '/images/editor/sprite.png', 16, 16, 0, 96));

    a.appendChild(document.createTextNode(' ' + $lang.get('editor_btn_wikitext')));

    span_wiki.appendChild(a);

    toggler.appendChild(span_wiki);

    // to-HTML button

    var a = document.createElement('a');

    a.href = '#';

    a.className = 'abutton image abutton_blue';

    a.appendChild(gen_sprite(scriptPath + '/images/editor/sprite.png', 16, 16, 0, 112));

    a.appendChild(document.createTextNode(' ' + $lang.get('editor_btn_graphical')));

    span_mce.appendChild(a);

    toggler.appendChild(span_mce);

    if ( response.page_format == 'xhtml' )

    {

      // Current selection is TinyMCE - make span_wiki have the link and span_mce be plaintext

      span_mce.style.display = 'none';

    }

    else

    {

      // Current selection is wikitext - set span_wiki to plaintext and span_mce to link

      span_wiki.style.display = 'none';

    }

  }

  // Form (to allow submits from MCE to trigger a real save)

  var form = document.createElement('form');

  form.action = 'javascript:void(0);';

  form.onsubmit = function()

  {

    ajaxEditorSave();

    return false;

  }

  // Draft notice

  if ( response.have_draft && !readonly )

  {

    var dn = document.createElement('div');

    dn.className = 'warning-box';

    dn.id = 'ajax_edit_draft_notice';

    dn.innerHTML = '<b>' + $lang.get('editor_msg_have_draft_title') + '</b><br />';

    dn.innerHTML += $lang.get('editor_msg_have_draft_body', { author: response.draft_author, time: response.draft_time });

  }

  // Old-revision notice

  if ( revid > 0 )

  {

    var oldrev_box = document.createElement('div');

    oldrev_box.className = 'usermessage';

    oldrev_box.appendChild(document.createTextNode($lang.get('editor_msg_editing_old_revision')));

  }

  // Preview holder

  var preview_anchor = document.createElement('a');

  preview_anchor.name = 'ajax_preview';

  preview_anchor.id = 'ajax_preview';

  var preview_container = document.createElement('div');

  preview_container.id = 'enano_editor_preview';

  preview_container.style.clear = 'left';

  // Textarea containing the content

  var ta_wrapper = document.createElement('div');

  ta_wrapper.style.margin = '10px 0';

  // ta_wrapper.style.clear = 'both';

  var textarea = document.createElement('textarea');

  ta_wrapper.appendChild(textarea);

  textarea.id = 'ajaxEditArea';

  textarea.rows = '20';

  textarea.cols = '60';

  textarea.style.width = '98.7%';

  // Revision metadata controls

  var tblholder = document.createElement('div');

  tblholder.className = 'tblholder';

  var metatable = document.createElement('table');

  metatable.setAttribute('border', '0');

  metatable.setAttribute('cellspacing', '1');

  metatable.setAttribute('cellpadding', '4');

  if ( readonly )

  {

    // Close Viewer button

    var toolbar = '';

    var head = new templateParser(response.toolbar_templates.toolbar_start);

    var button = new templateParser(response.toolbar_templates.toolbar_button);

    var tail = new templateParser(response.toolbar_templates.toolbar_end);

    toolbar += head.run();

    button.assign_bool({

        show_title: true

      });

    // Button: close

    button.assign_vars({

        TITLE: $lang.get('editor_btn_closeviewer'),

        IMAGE: editor_img_path + '/discard.gif',

        SPRITE: gen_sprite_html(editor_img_path + '/sprite.png', 16, 16, 0, 16),

        FLAGS: 'href="#" onclick="ajaxReset(true); return false;"'

      });

    toolbar += button.run();

    toolbar += tail.run();

  }

  else

  {

    // First row: edit summary

    var tr1 = document.createElement('tr');

    var td1_1 = document.createElement('td');

    var td1_2 = document.createElement('td');

    td1_1.className = 'row2';

    td1_2.className = 'row1';

    td1_2.style.width = '70%';

    td1_1.appendChild(document.createTextNode($lang.get('editor_lbl_edit_summary')));

    td1_1.appendChild(document.createElement('br'));

    var small = document.createElement('small');

    small.appendChild(document.createTextNode($lang.get('editor_lbl_edit_summary_explain')));

    td1_1.appendChild(small);

    var field_es = document.createElement('input');

    field_es.id = 'enano_editor_field_summary';

    field_es.type = 'text';

    field_es.size = '40';

    field_es.style.width = '96%';

    if ( revid > 0 )

    {

      undo_info.last_rev_id = revid;

      field_es.value = $lang.get('editor_reversion_edit_summary', undo_info);

    }

    td1_2.appendChild(field_es);

    tr1.appendChild(td1_1);

    tr1.appendChild(td1_2);

    // Second row: minor edit

    var tr2 = document.createElement('tr');

    var td2_1 = document.createElement('td');

    var td2_2 = document.createElement('td');

    td2_1.className = 'row2';

    td2_2.className = 'row1';

    td2_1.appendChild(document.createTextNode($lang.get('editor_lbl_minor_edit')));

    td2_1.appendChild(document.createElement('br'));

    var small = document.createElement('small');

    small.appendChild(document.createTextNode($lang.get('editor_lbl_minor_edit_explain')));

    td2_1.appendChild(small);

    var label = document.createElement('label');

    var field_mi = document.createElement('input');

    field_mi.id = 'enano_editor_field_minor';

    field_mi.type = 'checkbox';

    label.appendChild(field_mi);

    label.appendChild(document.createTextNode(' '));

    label.appendChild(document.createTextNode($lang.get('editor_lbl_minor_edit_field')));

    td2_2.appendChild(label);

    tr2.appendChild(td2_1);

    tr2.appendChild(td2_2);

    if ( captcha_hash )

    {

      // generate captcha field (effectively third row)

      var tr4 = document.createElement('tr');

      var td4_1 = document.createElement('td');

      var td4_2 = document.createElement('td');

      td4_1.className = 'row2';

      td4_2.className = 'row1';

      td4_1.appendChild(document.createTextNode($lang.get('editor_lbl_field_captcha')));

      td4_1.appendChild(document.createElement('br'));

      var small2 = document.createElement('small');

      small2.appendChild(document.createTextNode($lang.get('editor_msg_captcha_pleaseenter')));

      small2.appendChild(document.createElement('br'));

      small2.appendChild(document.createElement('br'));

      small2.appendChild(document.createTextNode($lang.get('editor_msg_captcha_blind')));

      td4_1.appendChild(small2);

      var img = document.createElement('img');

      img.src = makeUrlNS('Special', 'Captcha/' + captcha_hash);

      img.setAttribute('enano:captcha_hash', captcha_hash);

      img.id = 'enano_editor_captcha_img';

      img.onclick = function()

      {

        this.src = makeUrlNS('Special', 'Captcha/' + this.getAttribute('enano:captcha_hash') + '/' + Math.floor(Math.random() * 100000));

      }

      img.style.cursor = 'pointer';

      td4_2.appendChild(img);

      td4_2.appendChild(document.createElement('br'));

      td4_2.appendChild(document.createTextNode($lang.get('editor_lbl_field_captcha_code') + ' '));

      var input = document.createElement('input');

      input.type = 'text';

      input.id = 'enano_editor_field_captcha';

      input.setAttribute('enano:captcha_hash', captcha_hash);

      input.size = '9';

      td4_2.appendChild(input);

      tr4.appendChild(td4_1);

      tr4.appendChild(td4_2);

    }

    // Third row: controls

    var toolbar = '';

    var head = new templateParser(response.toolbar_templates.toolbar_start);

    var button = new templateParser(response.toolbar_templates.toolbar_button);

    var label = new templateParser(response.toolbar_templates.toolbar_label);

    var tail = new templateParser(response.toolbar_templates.toolbar_end);

    button.assign_bool({

        show_title: true

      });

    toolbar += head.run();

    // Button: Save

    button.assign_vars({

        TITLE: $lang.get('editor_btn_save'),

        IMAGE: editor_img_path + '/save.gif',

        SPRITE: gen_sprite_html(editor_img_path + '/sprite.png', 16, 16, 0, 64),

        FLAGS: 'href="#" onclick="ajaxEditorSave(); return false;"'

      });

    toolbar += button.run();

    // Button: preview

    button.assign_vars({

        TITLE: $lang.get('editor_btn_preview'),

        IMAGE: editor_img_path + '/preview.gif',

        SPRITE: gen_sprite_html(editor_img_path + '/sprite.png', 16, 16, 0, 32),

        FLAGS: 'href="#" onclick="ajaxEditorGenPreview(); return false;"'

      });

    toolbar += button.run();

    // Button: revert

    button.assign_vars({

        TITLE: $lang.get('editor_btn_revert'),

          IMAGE: editor_img_path + '/revert.gif',

          SPRITE: gen_sprite_html(editor_img_path + '/sprite.png', 16, 16, 0, 48),

        FLAGS: 'href="#" onclick="ajaxEditorRevertToLatest(); return false;"'

      });

    toolbar += button.run();

    // Button: diff

    button.assign_vars({

        TITLE: $lang.get('editor_btn_diff'),

        IMAGE: editor_img_path + '/diff.gif',

        SPRITE: gen_sprite_html(editor_img_path + '/sprite.png', 16, 16, 0, 0),

        FLAGS: 'href="#" onclick="ajaxEditorShowDiffs(); return false;"'

      });

    toolbar += button.run();

    // Button: cancel

    button.assign_vars({

        TITLE: $lang.get('editor_btn_cancel'),

        IMAGE: editor_img_path + '/discard.gif',

        SPRITE: gen_sprite_html(editor_img_path + '/sprite.png', 16, 16, 0, 16),

        FLAGS: 'href="#" onclick="ajaxEditorCancel(); return false;"'

      });

    toolbar += button.run();

    // Separator

    label.assign_vars({

        TITLE: ' '

      });

    toolbar += label.run();

    // Button: Save draft

    button.assign_vars({

        TITLE: $lang.get('editor_btn_savedraft'),

        IMAGE: editor_img_path + '/savedraft.gif',

        SPRITE: false,

        FLAGS: 'href="#" onclick="ajaxPerformAutosave(); return false;" id="ajax_edit_savedraft_btn"'

      });

    toolbar += button.run();

    toolbar += tail.run();

    metatable.appendChild(tr1);

    metatable.appendChild(tr2);

    if ( captcha_hash )

    {

      metatable.appendChild(tr4);

    }

    // metatable.appendChild(tr3);

  }

  tblholder.appendChild(metatable);

  // Edit disclaimer/notice

  if ( editNotice ) // This is set globally in {JS_DYNAMIC_VARS}.

  {

    var en_div = document.createElement('div');

    en_div.innerHTML = editNotice;

    en_div.className = 'usermessage';

    en_div.style.margin = '10px 0 0 0';

  }

  // Put it all together...

  form.appendChild(heading);

  if ( allow_wysiwyg )

    form.appendChild(toggler);

  if ( dn )

    form.appendChild(dn);

  if ( oldrev_box )

    form.appendChild(oldrev_box);

  form.appendChild(preview_anchor);

  form.appendChild(preview_container);

  form.appendChild(ta_wrapper);

  form.appendChild(tblholder);

  form.innerHTML += '<div style="margin: 10px 0 0 0;">' + toolbar + '</div>';

  edcon.appendChild(form);

  if ( editNotice && !readonly )

  {

    edcon.appendChild(en_div);

  }

  // more textarea attribs/init

  var textarea = document.getElementById('ajaxEditArea');

  textarea.as_last_save = 0;

  textarea.content_orig = content;

  textarea.used_draft = false;

  textarea.onkeyup = function()

  {

    if ( this.needReset )

    {

      var img = $dynano('ajax_edit_savedraft_btn').object.getElementsByTagName('img')[0];

      var lbl = $dynano('ajax_edit_savedraft_btn').object.getElementsByTagName('span')[0];

      img.src = editor_img_path + '/savedraft.gif';

      lbl.innerHTML = $lang.get('editor_btn_savedraft');

    }

    if ( window.AutosaveTimeoutObj )

      clearTimeout(window.AutosaveTimeoutObj);

    window.AutosaveTimeoutObj = setTimeout('ajaxAutosaveDraft();', ( AUTOSAVE_TIMEOUT * 1000 ));

  }

  if ( readonly )

  {

    textarea.className = 'mce_readonly';

    textarea.setAttribute('readonly', 'readonly');

  }

  $dynano('ajaxEditArea').object.focus();

  $dynano('ajaxEditArea').object._edTimestamp = timestamp;

  $dynano('ajaxEditArea').setContent(content);

  // If the editor preference is tinymce, switch the editor to TinyMCE now

  if ( response.page_format == 'xhtml' && allow_wysiwyg )

  {

    $dynano('ajaxEditArea').switchToMCE(false);

  }