/**
 * @file
 * Some basic behaviors and utility functions for Views UI.
 */
Drupal.viewsUi = {};

Drupal.behaviors.viewsUiEditView = {};

/**
 * Improve the user experience of the views edit interface.
 */
Drupal.behaviors.viewsUiEditView.attach = function (context, settings) {
  // Only show the SQL rewrite warning when the user has chosen the
  // corresponding checkbox.
  jQuery('#edit-query-options-disable-sql-rewrite').click(function () {
    jQuery('.sql-rewrite-warning').toggleClass('js-hide');
  });
};

Drupal.behaviors.viewsUiAddView = {};

/**
 * In the add view wizard, use the view name to prepopulate form fields such as
 * page title and menu link.
 */
Drupal.behaviors.viewsUiAddView.attach = function (context, settings) {
  var $ = jQuery;
  var exclude, replace, suffix;
  // Set up regular expressions to allow only numbers, letters, and dashes.
  exclude = new RegExp('[^a-z0-9\\-]+', 'g');
  replace = '-';

  // The page title, block title, and menu link fields can all be prepopulated
  // with the view name - no regular expression needed.
  var $fields = $(context).find('[id^="edit-page-title"], [id^="edit-block-title"], [id^="edit-page-link-properties-title"]');
  if ($fields.length) {
    if (!this.fieldsFiller) {
      this.fieldsFiller = new Drupal.viewsUi.FormFieldFiller($fields);
    }
    else {
      // After an AJAX response, this.fieldsFiller will still have event
      // handlers bound to the old version of the form fields (which don't exist
      // anymore). The event handlers need to be unbound and then rebound to the
      // new markup. Note that jQuery.live is difficult to make work in this
      // case because the IDs of the form fields change on every AJAX response.
      this.fieldsFiller.rebind($fields);
    }
  }

  // Prepopulate the path field with a URLified version of the view name.
  var $pathField = $(context).find('[id^="edit-page-path"]');
  if ($pathField.length) {
    if (!this.pathFiller) {
      this.pathFiller = new Drupal.viewsUi.FormFieldFiller($pathField, exclude, replace);
    }
    else {
      this.pathFiller.rebind($pathField);
    }
  }

  // Populate the RSS feed field with a URLified version of the view name, and
  // an .xml suffix (to make it unique).
  var $feedField = $(context).find('[id^="edit-page-feed-properties-path"]');
  if ($feedField.length) {
    if (!this.feedFiller) {
      suffix = '.xml';
      this.feedFiller = new Drupal.viewsUi.FormFieldFiller($feedField, exclude, replace, suffix);
    }
    else {
      this.feedFiller.rebind($feedField);
    }
  }
};

/**
 * Constructor for the Drupal.viewsUi.FormFieldFiller object.
 *
 * Prepopulates a form field based on the view name.
 *
 * @param $target
 *   A jQuery object representing the form field to prepopulate.
 * @param exclude
 *   Optional. A regular expression representing characters to exclude from the
 *   target field.
 * @param replace
 *   Optional. A string to use as the replacement value for disallowed
 *   characters.
 * @param suffix
 *   Optional. A suffix to append at the end of the target field content.
 */
Drupal.viewsUi.FormFieldFiller = function ($target, exclude, replace, suffix) {
  var $ = jQuery;
  this.source = $('#edit-human-name');
  this.target = $target;
  this.exclude = exclude || false;
  this.replace = replace || '';
  this.suffix = suffix || '';

  // Create bound versions of this instance's object methods to use as event
  // handlers. This will let us easily unbind those specific handlers later on.
  // NOTE: jQuery.proxy will not work for this because it assumes we want only
  // one bound version of an object method, whereas we need one version per
  // object instance.
  var self = this;
  this.populate = function () {return self._populate.call(self);};
  this.unbind = function () {return self._unbind.call(self);};

  this.bind();
  // Object constructor; no return value.
};

/**
 * Bind the form-filling behavior.
 */
Drupal.viewsUi.FormFieldFiller.prototype.bind = function () {
  this.unbind();
  // Populate the form field when the source changes.
  this.source.bind('keyup.viewsUi change.viewsUi', this.populate);
  // Quit populating the field as soon as it gets focus.
  this.target.bind('focus.viewsUi', this.unbind);
};

/**
 * Get the source form field value as altered by the passed-in parameters.
 */
Drupal.viewsUi.FormFieldFiller.prototype.getTransliterated = function () {
  var from = this.source.val();
  if (this.exclude) {
    from = from.toLowerCase().replace(this.exclude, this.replace);
  }
  return from + this.suffix;
};

/**
 * Populate the target form field with the altered source field value.
 */
Drupal.viewsUi.FormFieldFiller.prototype._populate = function () {
  var transliterated = this.getTransliterated();
  this.target.val(transliterated);
};

/**
 * Stop prepopulating the form fields.
 */
Drupal.viewsUi.FormFieldFiller.prototype._unbind = function () {
  this.source.unbind('keyup.viewsUi change.viewsUi', this.populate);
  this.target.unbind('focus.viewsUi', this.unbind);
};

/**
 * Bind event handlers to the new form fields, after they're replaced via AJAX.
 */
Drupal.viewsUi.FormFieldFiller.prototype.rebind = function ($fields) {
  this.target = $fields;
  this.bind();
}

Drupal.behaviors.addItemForm = {};
Drupal.behaviors.addItemForm.attach = function (context) {
  var $ = jQuery;
  // The add item form may have an id of views-ui-add-item-form--n.
  var $form = $(context).find('form[id^="views-ui-add-item-form"]').first();
  // Make sure we don't add more than one event handler to the same form.
  $form = $form.once('views-ui-add-item-form');
  if ($form.length) {
    new Drupal.viewsUi.addItemForm($form);
  }
}

Drupal.viewsUi.addItemForm = function($form) {
  this.$form = $form;
  this.$form.find('.views-filterable-options :checkbox').click(jQuery.proxy(this.handleCheck, this));
  // Find the wrapper of the displayed text.
  this.$selected_div = this.$form.find('.views-selected-options').parent();
  this.$selected_div.hide();
  this.checkedItems = [];
}

Drupal.viewsUi.addItemForm.prototype.handleCheck = function (event) {
  var $target = jQuery(event.target);
  var label = jQuery.trim($target.next().text());
  // Add/remove the checked item to the list.
  if ($target.is(':checked')) {
    this.$selected_div.show();
    this.checkedItems.push(label);
  }
  else {
    var length = this.checkedItems.length;
    var position = jQuery.inArray(label, this.checkedItems);
    // Delete the item from the list and take sure that the list doesn't have undefined items left.
    for (var i = 0; i < this.checkedItems.length; i++) {
      if (i == position) {
        this.checkedItems.splice(i, 1);
        i--;
        break;
      }
    }
    // Hide it again if none item is selected.
    if (this.checkedItems.length == 0) {
      this.$selected_div.hide();
    }
  }
  this.refreshCheckedItems();
}


/**
 * Refresh the display of the checked items.
 */
Drupal.viewsUi.addItemForm.prototype.refreshCheckedItems = function() {
  // Perhaps we should precache the text div, too.
  this.$selected_div.find('.views-selected-options').html(Drupal.checkPlain(this.checkedItems.join(', ')));
  Drupal.viewsUi.resizeModal('', true);
}


/**
 * The input field items that add displays must be rendered as <input> elements.
 * The following behavior detaches the <input> elements from the DOM, wraps them
 * in an unordered list, then appends them to the list of tabs.
 */
Drupal.behaviors.viewsUiRenderAddViewButton = {};

Drupal.behaviors.viewsUiRenderAddViewButton.attach = function (context, settings) {
  var $ = jQuery;
  // Build the add display menu and pull the display input buttons into it.
  var $menu = $('#views-display-menu-tabs', context).once('views-ui-render-add-view-button-processed');

  if (!$menu.length) {
    return;
  }
  var $addDisplayDropdown = $('<li class="add"><a href="#"><span class="icon add"></span>' + Drupal.t('Add') + '</a><ul class="action-list" style="display:none;"></ul></li>');
  var $displayButtons = $menu.nextAll('input.add-display').detach();
  $displayButtons.appendTo($addDisplayDropdown.find('.action-list')).wrap('<li>')
    .parent().first().addClass('first').end().last().addClass('last');
  // Remove the 'Add ' prefix from the button labels since they're being palced
  // in an 'Add' dropdown.
  // @todo This assumes English, but so does $addDisplayDropdown above. Add
  //   support for translation.
  $displayButtons.each(function () {
    var label = $(this).val();
    if (label.substr(0, 4) == 'Add ') {
      $(this).val(label.substr(4));
    }
  });
  $addDisplayDropdown.appendTo($menu);

  // Add the click handler for the add display button
  $('li.add > a', $menu).bind('click', function (event) {
    event.preventDefault();
    var $trigger = $(this);
    Drupal.behaviors.viewsUiRenderAddViewButton.toggleMenu($trigger);
  });
  // Add a mouseleave handler to close the dropdown when the user mouses
  // away from the item. We use mouseleave instead of mouseout because
  // the user is going to trigger mouseout when she moves from the trigger
  // link to the sub menu items.
  //
  // We use the 'li.add' selector because the open class on this item will be
  // toggled on and off and we want the handler to take effect in the cases
  // that the class is present, but not when it isn't.
  $menu.delegate('li.add', 'mouseleave', function (event) {
    var $this = $(this);
    var $trigger = $this.children('a[href="#"]');
    if ($this.children('.action-list').is(':visible')) {
      Drupal.behaviors.viewsUiRenderAddViewButton.toggleMenu($trigger);
    }
  });
};

/**
 * @note [@jessebeach] I feel like the following should be a more generic function and
 * not written specifically for this UI, but I'm not sure where to put it.
 */
Drupal.behaviors.viewsUiRenderAddViewButton.toggleMenu = function ($trigger) {
  $trigger.parent().toggleClass('open');
  $trigger.next().slideToggle('fast');
}


Drupal.behaviors.viewsUiSearchOptions = {};

Drupal.behaviors.viewsUiSearchOptions.attach = function (context) {
  var $ = jQuery;
  // The add item form may have an id of views-ui-add-item-form--n.
  var $form = $(context).find('form[id^="views-ui-add-item-form"]').first();
  // Make sure we don't add more than one event handler to the same form.
  $form = $form.once('views-ui-filter-options');
  if ($form.length) {
    new Drupal.viewsUi.OptionsSearch($form);
  }
};

/**
 * Constructor for the viewsUi.OptionsSearch object.
 *
 * The OptionsSearch object filters the available options on a form according
 * to the user's search term. Typing in "taxonomy" will show only those options
 * containing "taxonomy" in their label.
 */
Drupal.viewsUi.OptionsSearch = function ($form) {
  this.$form = $form;
  // Add a keyup handler to the search box.
  this.$searchBox = this.$form.find('#edit-options-search');
  this.$searchBox.keyup(jQuery.proxy(this.handleKeyup, this));
  // Get a list of option labels and their corresponding divs and maintain it
  // in memory, so we have as little overhead as possible at keyup time.
  this.options = this.getOptions(this.$form.find('.filterable-option'));
  // Restripe on initial loading.
  this.handleKeyup();
  // Trap the ENTER key in the search box so that it doesn't submit the form.
  this.$searchBox.keypress(function(event) {
    if (event.which == 13) {
      event.preventDefault();
    }
  });
};

/**
 * Assemble a list of all the filterable options on the form.
 *
 * @param $allOptions
 *   A jQuery object representing the rows of filterable options to be
 *   shown and hidden depending on the user's search terms.
 */
Drupal.viewsUi.OptionsSearch.prototype.getOptions = function ($allOptions) {
  var $ = jQuery;
  var i, $label, $description, $option;
  var options = [];
  var length = $allOptions.length;
  for (i = 0; i < length; i++) {
    $option = $($allOptions[i]);
    $label = $option.find('label');
    $description = $option.find('div.description');
    options[i] = {
      // Search on the lowercase version of the label text + description.
      'searchText': $label.text().toLowerCase() + " " + $description.text().toLowerCase(),
      // Maintain a reference to the jQuery object for each row, so we don't
      // have to create a new object inside the performance-sensitive keyup
      // handler.
      '$div': $option
    }
  }
  return options;
};

/**
 * Keyup handler for the search box that hides or shows the relevant options.
 */
Drupal.viewsUi.OptionsSearch.prototype.handleKeyup = function (event) {
  var found, i, j, option, search, words, wordsLength, zebraClass, zebraCounter;

  // Determine the user's search query. The search text has been converted to
  // lowercase.
  search = (this.$searchBox.val() || '').toLowerCase();
  words = search.split(' ');
  wordsLength = words.length;

  // Start the counter for restriping rows.
  zebraCounter = 0;

  // Search through the search texts in the form for matching text.
  var length = this.options.length;
  for (i = 0; i < length; i++) {
    // Use a local variable for the option being searched, for performance.
    option = this.options[i];
    found = true;
    // Each word in the search string has to match the item in order for the
    // item to be shown.
    for (j = 0; j < wordsLength; j++) {
      if (option.searchText.indexOf(words[j]) === -1) {
        found = false;
      }
    }
    if (found) {
      // Show the checkbox row, and restripe it.
      zebraClass = (zebraCounter % 2) ? 'odd' : 'even';
      option.$div.show();
      option.$div.removeClass('even odd');
      option.$div.addClass(zebraClass);
      zebraCounter++;
    }
    else {
      // The search string wasn't found; hide this item.
      option.$div.hide();
    }
  }
};


Drupal.behaviors.viewsUiPreview = {};
Drupal.behaviors.viewsUiPreview.attach = function (context, settings) {
  var $ = jQuery;

  // Only act on the edit view form.
  var contextualFiltersBucket = $('.views-display-column .views-ui-display-tab-bucket.contextual-filters', context);
  if (contextualFiltersBucket.length == 0) {
    return;
  }

  // If the display has no contextual filters, hide the form where you enter
  // the contextual filters for the live preview. If it has contextual filters,
  // show the form.
  var contextualFilters = $('.views-display-setting a', contextualFiltersBucket);
  if (contextualFilters.length) {
    $('#preview-args').parent().show();
  }
  else {
    $('#preview-args').parent().hide();
  }

  // Executes an initial preview.
  if ($('#edit-displays-live-preview').once('edit-displays-live-preview').is(':checked')) {
    $('#preview-submit').once('edit-displays-live-preview').click();
  }
};


Drupal.behaviors.viewsUiRearrangeFilter = {};
Drupal.behaviors.viewsUiRearrangeFilter.attach = function (context, settings) {
  var $ = jQuery;
  // Only act on the rearrange filter form.
  if (typeof Drupal.tableDrag == 'undefined' || typeof Drupal.tableDrag['views-rearrange-filters'] == 'undefined') {
    return;
  }

  var table = $('#views-rearrange-filters', context).once('views-rearrange-filters');
  var operator = $('.form-item-filter-groups-operator', context).once('views-rearrange-filters');
  if (table.length) {
    new Drupal.viewsUi.rearrangeFilterHandler(table, operator);
  }
};

/**
 * Improve the UI of the rearrange filters dialog box.
 */
Drupal.viewsUi.rearrangeFilterHandler = function (table, operator) {
  var $ = jQuery;
  // Keep a reference to the <table> being altered and to the div containing
  // the filter groups operator dropdown (if it exists).
  this.table = table;
  this.operator = operator;
  this.hasGroupOperator = this.operator.length > 0;

  // Keep a reference to all draggable rows within the table.
  this.draggableRows = $('.draggable', table);

  // Keep a reference to the buttons for adding and removing filter groups.
  this.addGroupButton = $('input#views-add-group');
  this.removeGroupButtons = $('input.views-remove-group', table);

  // Add links that duplicate the functionality of the (hidden) add and remove
  // buttons.
  this.insertAddRemoveFilterGroupLinks();

  // When there is a filter groups operator dropdown on the page, create
  // duplicates of the dropdown between each pair of filter groups.
  if (this.hasGroupOperator) {
    this.dropdowns = this.duplicateGroupsOperator();
    this.syncGroupsOperators();
  }

  // Add methods to the tableDrag instance to account for operator cells (which
  // span multiple rows), the operator labels next to each filter (e.g., "And"
  // or "Or"), the filter groups, and other special aspects of this tableDrag
  // instance.
  this.modifyTableDrag();

  // Initialize the operator labels (e.g., "And" or "Or") that are displayed
  // next to the filters in each group, and bind a handler so that they change
  // based on the values of the operator dropdown within that group.
  this.redrawOperatorLabels();
  $('.views-group-title select', table)
    .once('views-rearrange-filter-handler')
    .bind('change.views-rearrange-filter-handler', $.proxy(this, 'redrawOperatorLabels'));

  // Bind handlers so that when a "Remove" link is clicked, we:
  // - Update the rowspans of cells containing an operator dropdown (since they
  //   need to change to reflect the number of rows in each group).
  // - Redraw the operator labels next to the filters in the group (since the
  //   filter that is currently displayed last in each group is not supposed to
  //   have a label display next to it).
  $('a.views-groups-remove-link', this.table)
    .once('views-rearrange-filter-handler')
    .bind('click.views-rearrange-filter-handler', $.proxy(this, 'updateRowspans'))
    .bind('click.views-rearrange-filter-handler', $.proxy(this, 'redrawOperatorLabels'));
};

/**
 * Insert links that allow filter groups to be added and removed.
 */
Drupal.viewsUi.rearrangeFilterHandler.prototype.insertAddRemoveFilterGroupLinks = function () {
  var $ = jQuery;

  // Insert a link for adding a new group at the top of the page, and make it
  // match the action links styling used in a typical page.tpl.php. Note that
  // Drupal does not provide a theme function for this markup, so this is the
  // best we can do.
  $('<ul class="action-links"><li><a id="views-add-group-link" href="#">' + this.addGroupButton.val() + '</a></li></ul>')
    .prependTo(this.table.parent())
    // When the link is clicked, dynamically click the hidden form button for
    // adding a new filter group.
    .once('views-rearrange-filter-handler')
    .bind('click.views-rearrange-filter-handler', $.proxy(this, 'clickAddGroupButton'));

  // Find each (visually hidden) button for removing a filter group and insert
  // a link next to it.
  var length = this.removeGroupButtons.length;
  for (i = 0; i < length; i++) {
    var $removeGroupButton = $(this.removeGroupButtons[i]);
    var buttonId = $removeGroupButton.attr('id');
    $('<a href="#" class="views-remove-group-link">' + Drupal.t('Remove group') + '</a>')
      .insertBefore($removeGroupButton)
      // When the link is clicked, dynamically click the corresponding form
      // button.
      .once('views-rearrange-filter-handler')
      .bind('click.views-rearrange-filter-handler', {buttonId: buttonId}, $.proxy(this, 'clickRemoveGroupButton'));
  }
};

/**
 * Dynamically click the button that adds a new filter group.
 */
Drupal.viewsUi.rearrangeFilterHandler.prototype.clickAddGroupButton = function () {
  // Due to conflicts between Drupal core's AJAX system and the Views AJAX
  // system, the only way to get this to work seems to be to trigger both the
  // .mousedown() and .submit() events.
  this.addGroupButton.mousedown();
  this.addGroupButton.submit();
  return false;
};

/**
 * Dynamically click a button for removing a filter group.
 *
 * @param event
 *   Event being triggered, with event.data.buttonId set to the ID of the
 *   form button that should be clicked.
 */
Drupal.viewsUi.rearrangeFilterHandler.prototype.clickRemoveGroupButton = function (event) {
  // For some reason, here we only need to trigger .submit(), unlike for
  // Drupal.viewsUi.rearrangeFilterHandler.prototype.clickAddGroupButton()
  // where we had to trigger .mousedown() also.
  jQuery('input#' + event.data.buttonId, this.table).submit();
  return false;
};

/**
 * Move the groups operator so that it's between the first two groups, and
 * duplicate it between any subsequent groups.
 */
Drupal.viewsUi.rearrangeFilterHandler.prototype.duplicateGroupsOperator = function () {
  var $ = jQuery;
  var dropdowns, newRow;

  var titleRows = $('tr.views-group-title'), titleRow;

  // Get rid of the explanatory text around the operator; its placement is
  // explanatory enough.
  this.operator.find('label').add('div.description').addClass('element-invisible');
  this.operator.find('select').addClass('form-select');

  // Keep a list of the operator dropdowns, so we can sync their behavior later.
  dropdowns = this.operator;

  // Move the operator to a new row just above the second group.
  titleRow = $('tr#views-group-title-2');
  newRow = $('<tr class="filter-group-operator-row"><td colspan="5"></td></tr>');
  newRow.find('td').append(this.operator);
  newRow.insertBefore(titleRow);
  var i, length = titleRows.length;
  // Starting with the third group, copy the operator to a new row above the
  // group title.
  for (i = 2; i < length; i++) {
    titleRow = $(titleRows[i]);
    // Make a copy of the operator dropdown and put it in a new table row.
    var fakeOperator = this.operator.clone();
    fakeOperator.attr('id', '');
    newRow = $('<tr class="filter-group-operator-row"><td colspan="5"></td></tr>');
    newRow.find('td').append(fakeOperator);
    newRow.insertBefore(titleRow);
    dropdowns = dropdowns.add(fakeOperator);
  }

  return dropdowns;
};

/**
 * Make the duplicated groups operators change in sync with each other.
 */
Drupal.viewsUi.rearrangeFilterHandler.prototype.syncGroupsOperators = function () {
  if (this.dropdowns.length < 2) {
    // We only have one dropdown (or none at all), so there's nothing to sync.
    return;
  }

  this.dropdowns.change(jQuery.proxy(this, 'operatorChangeHandler'));
};

/**
 * Click handler for the operators that appear between filter groups.
 *
 * Forces all operator dropdowns to have the same value.
 */
Drupal.viewsUi.rearrangeFilterHandler.prototype.operatorChangeHandler = function (event) {
  var $ = jQuery;
  var $target = $(event.target);
  var operators = this.dropdowns.find('select').not($target);

  // Change the other operators to match this new value.
  operators.val($target.val());
};

Drupal.viewsUi.rearrangeFilterHandler.prototype.modifyTableDrag = function () {
  var tableDrag = Drupal.tableDrag['views-rearrange-filters'];
  var filterHandler = this;

  /**
   * Override the row.onSwap method from tabledrag.js.
   *
   * When a row is dragged to another place in the table, several things need
   * to occur.
   * - The row needs to be moved so that it's within one of the filter groups.
   * - The operator cells that span multiple rows need their rowspan attributes
   *   updated to reflect the number of rows in each group.
   * - The operator labels that are displayed next to each filter need to be
   *   redrawn, to account for the row's new location.
   */
  tableDrag.row.prototype.onSwap = function () {
    if (filterHandler.hasGroupOperator) {
      // Make sure the row that just got moved (this.group) is inside one of
      // the filter groups (i.e. below an empty marker row or a draggable). If
      // it isn't, move it down one.
      var thisRow = jQuery(this.group);
      var previousRow = thisRow.prev('tr');
      if (previousRow.length && !previousRow.hasClass('group-message') && !previousRow.hasClass('draggable')) {
        // Move the dragged row down one.
        var next = thisRow.next();
        if (next.is('tr')) {
          this.swap('after', next);
        }
      }
      filterHandler.updateRowspans();
    }
    // Redraw the operator labels that are displayed next to each filter, to
    // account for the row's new location.
    filterHandler.redrawOperatorLabels();
  };

  /**
   * Override the onDrop method from tabledrag.js.
   */
  tableDrag.onDrop = function () {
    var $ = jQuery;

    // If the tabledrag change marker (i.e., the "*") has been inserted inside
    // a row after the operator label (i.e., "And" or "Or") rearrange the items
    // so the operator label continues to appear last.
    var changeMarker = $(this.oldRowElement).find('.tabledrag-changed');
    if (changeMarker.length) {
      // Search for occurrences of the operator label before the change marker,
      // and reverse them.
      var operatorLabel = changeMarker.prevAll('.views-operator-label');
      if (operatorLabel.length) {
        operatorLabel.insertAfter(changeMarker);
      }
    }

    // Make sure the "group" dropdown is properly updated when rows are dragged
    // into an empty filter group. This is borrowed heavily from the block.js
    // implementation of tableDrag.onDrop().
    var groupRow = $(this.rowObject.element).prevAll('tr.group-message').get(0);
    var groupName = groupRow.className.replace(/([^ ]+[ ]+)*group-([^ ]+)-message([ ]+[^ ]+)*/, '$2');
    var groupField = $('select.views-group-select', this.rowObject.element);
    if ($(this.rowObject.element).prev('tr').is('.group-message') && !groupField.is('.views-group-select-' + groupName)) {
      var oldGroupName = groupField.attr('class').replace(/([^ ]+[ ]+)*views-group-select-([^ ]+)([ ]+[^ ]+)*/, '$2');
      groupField.removeClass('views-group-select-' + oldGroupName).addClass('views-group-select-' + groupName);
      groupField.val(groupName);
    }
  };
};


/**
 * Redraw the operator labels that are displayed next to each filter.
 */
Drupal.viewsUi.rearrangeFilterHandler.prototype.redrawOperatorLabels = function () {
  var $ = jQuery;
  for (i = 0; i < this.draggableRows.length; i++) {
    // Within the row, the operator labels are displayed inside the first table
    // cell (next to the filter name).
    var $draggableRow = $(this.draggableRows[i]);
    var $firstCell = $('td:first', $draggableRow);
    if ($firstCell.length) {
      // The value of the operator label ("And" or "Or") is taken from the
      // first operator dropdown we encounter, going backwards from the current
      // row. This dropdown is the one associated with the current row's filter
      // group.
      var operatorValue = $draggableRow.prevAll('.views-group-title').find('option:selected').html();
      var operatorLabel = '<span class="views-operator-label">' + operatorValue + '</span>';
      // If the next visible row after this one is a draggable filter row,
      // display the operator label next to the current row. (Checking for
      // visibility is necessary here since the "Remove" links hide the removed
      // row but don't actually remove it from the document).
      var $nextRow = $draggableRow.nextAll(':visible').eq(0);
      var $existingOperatorLabel = $firstCell.find('.views-operator-label');
      if ($nextRow.hasClass('draggable')) {
        // If an operator label was already there, replace it with the new one.
        if ($existingOperatorLabel.length) {
          $existingOperatorLabel.replaceWith(operatorLabel);
        }
        // Otherwise, append the operator label to the end of the table cell.
        else {
          $firstCell.append(operatorLabel);
        }
      }
      // If the next row doesn't contain a filter, then this is the last row
      // in the group. We don't want to display the operator there (since
      // operators should only display between two related filters, e.g.
      // "filter1 AND filter2 AND filter3"). So we remove any existing label
      // that this row has.
      else {
        $existingOperatorLabel.remove();
      }
    }
  }
};

/**
 * Update the rowspan attribute of each cell containing an operator dropdown.
 */
Drupal.viewsUi.rearrangeFilterHandler.prototype.updateRowspans = function () {
  var $ = jQuery;
  var i, $row, $currentEmptyRow, draggableCount, $operatorCell;
  var rows = $(this.table).find('tr');
  var length = rows.length;
  for (i = 0; i < length; i++) {
    $row = $(rows[i]);
    if ($row.hasClass('views-group-title')) {
      // This row is a title row.
      // Keep a reference to the cell containing the dropdown operator.
      $operatorCell = $($row.find('td.group-operator'));
      // Assume this filter group is empty, until we find otherwise.
      draggableCount = 0;
      $currentEmptyRow = $row.next('tr');
      $currentEmptyRow.removeClass('group-populated').addClass('group-empty');
      // The cell with the dropdown operator should span the title row and
      // the "this group is empty" row.
      $operatorCell.attr('rowspan', 2);
    }
    else if (($row).hasClass('draggable') && $row.is(':visible')) {
      // We've found a visible filter row, so we now know the group isn't empty.
      draggableCount++;
      $currentEmptyRow.removeClass('group-empty').addClass('group-populated');
      // The operator cell should span all draggable rows, plus the title.
      $operatorCell.attr('rowspan', draggableCount + 1);
    }
  }
};

Drupal.behaviors.viewsFilterConfigSelectAll = {};

/**
 * Add a select all checkbox, which checks each checkbox at once.
 */
Drupal.behaviors.viewsFilterConfigSelectAll.attach = function(context) {
  var $ = jQuery;
  // Show the select all checkbox.
  $('#views-ui-config-item-form div.form-item-options-value-all', context).once(function() {
    $(this).show();
  })
  .find('input[type=checkbox]')
  .click(function() {
    var checked = $(this).is(':checked');
    // Update all checkbox beside the select all checkbox.
    $(this).parents('.form-checkboxes').find('input[type=checkbox]').each(function() {
      $(this).attr('checked', checked);
    });
  });
  // Uncheck the select all checkbox if any of the others are unchecked.
  $('#views-ui-config-item-form div.form-type-checkbox').not($('.form-item-options-value-all')).find('input[type=checkbox]').each(function() {
    $(this).click(function() {
      if ($(this).is('checked') == 0) {
        $('#edit-options-value-all').removeAttr('checked');
      }
    });
  });
};

/**
 * Ensure the desired default button is used when a form is implicitly submitted via an ENTER press on textfields, radios, and checkboxes.
 *
 * @see http://www.w3.org/TR/html5/association-of-controls-and-forms.html#implicit-submission
 */
Drupal.behaviors.viewsImplicitFormSubmission = {};
Drupal.behaviors.viewsImplicitFormSubmission.attach = function (context, settings) {
  var $ = jQuery;
  $(':text, :password, :radio, :checkbox', context).once('viewsImplicitFormSubmission', function() {
    $(this).keypress(function(event) {
      if (event.which == 13) {
        var formId = this.form.id;
        if (formId && settings.viewsImplicitFormSubmission && settings.viewsImplicitFormSubmission[formId] && settings.viewsImplicitFormSubmission[formId].defaultButton) {
          event.preventDefault();
          var buttonId = settings.viewsImplicitFormSubmission[formId].defaultButton;
          var $button = $('#' + buttonId, this.form);
          if ($button.length == 1 && $button.is(':enabled')) {
            if (Drupal.ajax && Drupal.ajax[buttonId]) {
              $button.trigger(Drupal.ajax[buttonId].element_settings.event);
            }
            else {
              $button.click();
            }
          }
        }
      }
    });
  });
};

/**
 * Remove icon class from elements that are themed as buttons or dropbuttons.
 */
Drupal.behaviors.viewsRemoveIconClass = {};
Drupal.behaviors.viewsRemoveIconClass.attach = function (context, settings) {
  jQuery('.ctools-button', context).once('RemoveIconClass', function () {
    var $ = jQuery;
    var $this = $(this);
    $('.icon', $this).removeClass('icon');
    $('.horizontal', $this).removeClass('horizontal');
  });
};

/**
 * Change "Expose filter" buttons into checkboxes.
 */
Drupal.behaviors.viewsUiCheckboxify = {};
Drupal.behaviors.viewsUiCheckboxify.attach = function (context, settings) {
  var $ = jQuery;
  var $buttons = $('#edit-options-expose-button-button, #edit-options-group-button-button').once('views-ui-checkboxify');
  var length = $buttons.length;
  var i;
  for (i = 0; i < length; i++) {
    new Drupal.viewsUi.Checkboxifier($buttons[i]);
  }
};

/**
 * Change the default widget to select the default group according to the
 * selected widget for the exposed group.
 */
Drupal.behaviors.viewsUiChangeDefaultWidget = {};
Drupal.behaviors.viewsUiChangeDefaultWidget.attach = function (context, settings) {
  var $ = jQuery;
  function change_default_widget(multiple) {
    if (multiple) {
      $('input.default-radios').hide();
      $('td.any-default-radios-row').parent().hide();
      $('input.default-checkboxes').show();
    }
    else {
      $('input.default-checkboxes').hide();
      $('td.any-default-radios-row').parent().show();
      $('input.default-radios').show();
    }
  }
  // Update on widget change.
  $('input[name="options[group_info][multiple]"]').change(function() {
    change_default_widget($(this).attr("checked"));
  });
  // Update the first time the form is rendered.
  $('input[name="options[group_info][multiple]"]').trigger('change');
};

/**
 * Attaches an expose filter button to a checkbox that triggers its click event.
 *
 * @param button
 *   The DOM object representing the button to be checkboxified.
 */
Drupal.viewsUi.Checkboxifier = function (button) {
  var $ = jQuery;
  this.$button = $(button);
  this.$parent = this.$button.parent('div.views-expose, div.views-grouped');
  this.$input = this.$parent.find('input:checkbox, input:radio');
  // Hide the button and its description.
  this.$button.hide();
  this.$parent.find('.exposed-description, .grouped-description').hide();

  this.$input.click($.proxy(this, 'clickHandler'));

};

/**
 * When the checkbox is checked or unchecked, simulate a button press.
 */
Drupal.viewsUi.Checkboxifier.prototype.clickHandler = function (e) {
  this.$button.mousedown();
  this.$button.submit();
};

/**
 * Change the Apply button text based upon the override select state.
 */
Drupal.behaviors.viewsUiOverrideSelect = {};
Drupal.behaviors.viewsUiOverrideSelect.attach = function (context, settings) {
  var $ = jQuery;
  $('#edit-override-dropdown', context).once('views-ui-override-button-text', function() {
    // Closures! :(
    var $submit = $('#edit-submit', context);
    var old_value = $submit.val();

    $submit.once('views-ui-override-button-text')
      .bind('mouseup', function() {
        $(this).val(old_value);
        return true;
      });

    $(this).bind('change', function() {
      if ($(this).val() == 'default') {
        $submit.val(Drupal.t('Apply (all displays)'));
      }
      else if ($(this).val() == 'default_revert') {
        $submit.val(Drupal.t('Revert to default'));
      }
      else {
        $submit.val(Drupal.t('Apply (this display)'));
      }
    })
    .trigger('change');
  });

};

Drupal.viewsUi.resizeModal = function (e, no_shrink) {
  var $ = jQuery;
  var $modal = $('.views-ui-dialog');
  var $scroll = $('.scroll', $modal);
  if ($modal.size() == 0 || $modal.css('display') == 'none') {
    return;
  }

  var maxWidth = parseInt($(window).width() * .85); // 70% of window
  var minWidth = parseInt($(window).width() * .6); // 70% of window

  // Set the modal to the minwidth so that our width calculation of
  // children works.
  $modal.css('width', minWidth);
  var width = minWidth;

  // Don't let the window get more than 80% of the display high.
  var maxHeight = parseInt($(window).height() * .8);
  var minHeight = 200;
  if (no_shrink) {
    minHeight = $modal.height();
  }

  if (minHeight > maxHeight) {
    minHeight = maxHeight;
  }

  var height = 0;

  // Calculate the height of the 'scroll' region.
  var scrollHeight = 0;

  scrollHeight += parseInt($scroll.css('padding-top'));
  scrollHeight += parseInt($scroll.css('padding-bottom'));

  $scroll.children().each(function() {
    var w = $(this).innerWidth();
    if (w > width) {
      width = w;
    }
    scrollHeight += $(this).outerHeight(true);
  });

  // Now, calculate what the difference between the scroll and the modal
  // will be.

  var difference = 0;
  difference += parseInt($scroll.css('padding-top'));
  difference += parseInt($scroll.css('padding-bottom'));
  difference += $('.views-override').outerHeight(true);
  difference += $('.views-messages').outerHeight(true);
  difference += $('#views-ajax-title').outerHeight(true);
  difference += $('.views-add-form-selected').outerHeight(true);
  difference += $('.form-buttons', $modal).outerHeight(true);

  height = scrollHeight + difference;

  if (height > maxHeight) {
    height = maxHeight;
    scrollHeight = maxHeight - difference;
  }
  else if (height < minHeight) {
    height = minHeight;
    scrollHeight = minHeight - difference;
  }

  if (width > maxWidth) {
    width = maxWidth;
  }

  // Get where we should move content to
  var top = ($(window).height() / 2) - (height / 2);
  var left = ($(window).width() / 2) - (width / 2);

  $modal.css({
    'top': top + 'px',
    'left': left + 'px',
    'width': width + 'px',
    'height': height + 'px'
  });

  // Ensure inner popup height matches.
  $(Drupal.settings.views.ajax.popup).css('height', height + 'px');

  $scroll.css({
    'height': scrollHeight + 'px',
    'max-height': scrollHeight + 'px'
  });

};

jQuery(function() {
  jQuery(window).bind('resize', Drupal.viewsUi.resizeModal);
  jQuery(window).bind('scroll', Drupal.viewsUi.resizeModal);
});
