/**
 * Copyright (C) 2009 eXo Platform SAS.
 * 
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 * 
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

/**
 * The mask layer, that appears when an ajax call waits for its result
 */

(function(base, uiMaskLayer, $) {

  eXo.portal.UIMaskWorkspace = {

    show : function(maskId, width, height) {
      this.maskWorkpace = document.getElementById(maskId);
      if (this.maskWorkpace) {
    	var content = $(this.maskWorkpace).find('.UIMaskWorkspace');
        if (width > -1) {
        	content.width(width);
        }

        document.body.style.overflow = 'hidden';
        if (eXo.portal.UIMaskWorkspace.maskLayer == null) {
          var maskLayer = uiMaskLayer.createMask("UIPortalApplication",
              this.maskWorkpace, 30);
          eXo.portal.UIMaskWorkspace.maskLayer = maskLayer;
        }
        this.maskWorkpace.style.margin = "auto";
        this.maskWorkpace.style.display = "block";
        $("#UIWorkingWorkspace").addClass("background");

        var browser = base.Browser;
        eXo.portal.UIMaskWorkspace.resetPositionEvt();
        browser.addOnResizeCallback('mid_maskWorkspace',
            eXo.portal.UIMaskWorkspace.resetPositionEvt);
//        browser.addOnScrollCallback("setPosition_maskWorkspace",
//            eXo.portal.UIMaskWorkspace.resetPositionEvt);
      }
    },

    hide : function(maskId) {
      this.maskWorkpace = document.getElementById(maskId);
      if (eXo.portal.UIMaskWorkspace.maskLayer == undefined
          || !this.maskWorkpace) {
        return;
      }
      uiMaskLayer.removeMask(eXo.portal.UIMaskWorkspace.maskLayer);
      eXo.portal.UIMaskWorkspace.maskLayer = null;
      this.maskWorkpace.style.display = "none";
      document.body.style.overflow = 'auto';
      $("#UIWorkingWorkspace").removeClass("background");
    },

    /**
     * Resets the position of the mask calls eXo.core.uiMaskLayer.setPosition to
     * perform this operation
     */
    resetPositionEvt : function() {
      var maskWorkpace = eXo.portal.UIMaskWorkspace.maskWorkpace;
      if (maskWorkpace && (maskWorkpace.style.display == "block")) {
	    var maskHeight = $(maskWorkpace).height();
        var content = $(maskWorkpace).find('.UIMaskWorkspace');
        if (content.height() < maskHeight) {
          content.css('margin-top', (maskHeight - content.height()) / 2);
        } else {
          content.css('margin-top', 0);
        }
        try {
          uiMaskLayer.blockContainer = document
              .getElementById("UIPortalApplication");
          uiMaskLayer.object = maskWorkpace;
          uiMaskLayer.scrollCallback();
        } catch (e) {
        }
        maskWorkpace.style.position = 'fixed';
        maskWorkpace.style.top = 0;
      }
    }
  };

  return eXo.portal.UIMaskWorkspace;
})(base, uiMaskLayer, $);