viewer.js

/**
 * Nutils
 * Nutils viewer, transforms a HTML document with a <pre> tag
 * and links with class "plot" into a viewer.
 *
 * If the <pre> contains a span with the id navbar this will be
 * put in the menu and the links with  the following classes will
 * have shortcuts:
 *
 * a.nav_latest     -> r
 * a.nav_latestall  -> Shift + r
 * a.nav_index      -> i
 */
function Nutils() {
    /**
     * Nutils._iframes
     * Enable iframes to view other datatypes
     */
    this._iframe = true;

    /**
     * Nutils._media
     * Media container <div id="media">
     * @var jQuery
     */
    this._media;

    /**
     * Nutils._controls
     * Controlbar <div id="controls">
     * @var jQuery
     */
    this._controls;

    /**
     * Nutils._code
     * Code <pre id="code">
     * @var jQuery
     */
    this._code;

    /**
     * Nutils._links
     * All plotable links <a class="plot">
     * @var jQuery
     */
    this._links;

    /**
     * Nutils._imglink
     * Link around image <a id="media-link">
     * @var jQuery
     */
    this._imglink;

    /**
     * Nutils._img
     * Image <img id="media-img">
     * @var jQuery
     */
    this._img;

    /**
     * Nutils._selGallery
     * Select field for galleries <select>
     * @var jQuery
     */
    this._selGallery;

    /**
     * Nutils._selView
     * Select field for views <select>
     * @var jQuery
     */
    this._selView;

    /**
     * Nutils._btnFirst
     * Button to show first image in gallery field <button>
     * @var jQuery
     */
    this._btnFirst;

    /**
     * Nutils._btnPrev
     * Button to show previous image in gallery field <button>
     * @var jQuery
     */
    this._btnPrev;

    /**
     * Nutils._btnNext
     * Button to show next image in gallery field <button>
     * @var jQuery
     */
    this._btnNext;

    /**
     * Nutils._btnLast
     * Button to show last image in gallery field <button>
     * @var jQuery
     */
    this._btnLast;

    /**
     * Nutils._inpNutils
     * Checkbox to enable nutils <input>
     * @var jQuery
     */
    this._inpNutils

    /**
     * Nutils._navbar
     * Navigation bar with permalinks <span>
     * @var jQuery
     */
		this._navbar;

    /**
     * Nutils._aLatest
     * Permalink to latest simulation <a class="nav_latest">
     * @var jQuery
     */
		this._aLatest;

    /**
     * Nutils._aLatestAll
     * Permalink to overall latest simulation <a class="nav_latestall">
     * @var jQuery
     */
		this._aLatestAll;

    /**
     * Nutils._aIndex
     * Permalink to index <a class="nav_index">
     * @var jQuery
     */
		this._aIndex;

    /**
     * Nutils._npreload
     * Number of images preloaded before and after current image
     * @var int
     */
		this._npreload = 2;

    /**
     * Nutils._npreload
     * Images preloaded before and after current image
     * @var Array
     */
		this._ipreload = new Array();

    /**
     * Nutils._imgCurrent
     * Image object to hold current image
     * @var Image
     */
		this._imgCurrent = new Image();

    /**
     * Nutils._imgPreload
     * Image object to preload previous and next images
     * @var Image
     */
		this._imgPreload = new Image();

    /**
     * Nutils._plots
     * Object with galleries
     *
     * _plots['*'] = [0,1,2,3]
     * _plots['first'] = [0,1]
     * _plots['second'] = [2,3]
     *
     * @var Object
     */
		this._galleries = {};

    /**
     * Nutils._data
     * Array with plotdata
     * @var Array
     */
    this._data = new Array();

    /**
     * Nutils._current
     * Current with current plot gallery and index
     * @var Array
     */
    this._current = {
					'gallery': '*',
					'index': 0
				 };

    /**
     * Nutils.__init__()
     * Construct nutils class
     *
     * @return void
     */
    this.__init__ = function ( $sel ){
      var self = this;

      this._code = $('pre')
										.attr('id', 'code')
										.addClass('column');
      this._links = $('a.plot', this._code);

      this._media 			= $('<div id="media" class="column">').insertAfter(this._code);
      this._imglink			= $('<a id="media-link" "href="" title="Click to view the image or press V" />').appendTo(this._media);
      this._controls 		= $('<div id="controls">').appendTo('body');
      this._img 				= $('<img id="media-img" src="" alt="" title="" />').appendTo(this._imglink);
      this._frame 				= $('<iframe id="media-frame" href=""></iframe>').appendTo(this._media);
      this._selGallery 	= $('<select id="sel-gallery"><option value="*">-- Show all --</option></select>').appendTo(this._controls);
      this._btnFirst 		= $('<button title="&#8593; (up arrow) or Shift + K" "id="btn-first">&laquo;</button>').appendTo(this._controls);
      this._btnPrev 		= $('<button title="&#8592; (left arrow) or K" id="btn-prev">&lt;</button>').appendTo(this._controls);
      this._btnNext 		= $('<button title="&#8594; (right arrow) or J" id="btn-next">&gt;</button>').appendTo(this._controls);
      this._btnLast 		= $('<button title="&#8595; (down arrow) or Shift + J" id="btn-last">&raquo;</button>').appendTo(this._controls);
      this._selView 	= $('<select id="sel-view"><option value="both" selected>term / img (G)</option><option value="term">term (H)</option><option value="img">img (F)</option></select>').appendTo(this._controls);

 			this._navbar = this._code.find('#navbar')
												.prependTo(this._controls);
			this._aLatest = this._navbar.find('.nav_latest')
												.attr('title', 'L');
			this._aLatestAll = this._navbar.find('.nav_latestall')
												.attr('title', 'Shift + L');
			this._aIndex = this._navbar.find('.nav_index')
												.attr('title', 'I');


      // Include the settings file
      // var html = $('body').html();
      // $('body').html(html + '<script type="text/javascript" src="../../../../../settings.js"></script>');
      // $('body').append('<script type="text/javascript" src="../../../../../nutilsrc.js"></script>');

      // Build gallery
     	this._galleries['*'] = new Array();
			this._links.each(function () {
        var $a = $(this);
        var url = $a.attr('href');
        var hash = $a.attr('name');

				// Add gallery
        var gal = self.getGalleryName(url);
        if( typeof self._galleries[gal] == 'undefined' ) {
          self._galleries[gal] = new Array();
          self._selGallery
            .append('<option value="' + gal + '">' + gal + '</option>');
        }

				// Key for this image
        var key = self._data.length;

				// Store additional image data
				var data = {
					'src': url,
					'img': url.match(/\.(png|jpe?g|gif)$/ig),
					'name': url,
          'hash': hash
				};
				self._data.push(data);

				// Preload images
				if( key < (self._npreload + 1) )
          self._imgPreload.src = url

				// Add to galleries
        self._galleries['*'].push(key);
        var idx = self._galleries[gal].push(key);
				--idx;

        $a.attr({
					'id': 'nutils-viewer-' + key,
					'idx': idx,
					'gal': gal
			 	});
      });

      // Show current
      if( typeof $sel != 'undefined' ) {
        this._current.gallery = $sel.attr('gal') || '*';
        this._current.index = $sel.attr('idx') || 0;
      }
			this.show(this._current.gallery, this._current.index );

      // Attach events
      $(window).resize(function (){
          self.render();
        });

      this._btnFirst.click(function() { self.first(); });
      this._btnNext.click(function() { self.next(); });
      this._btnPrev.click(function() { self.prev(); });
      this._btnLast.click(function() { self.last(); });
      this._selView
        .change(function() {
          var vw = $(':selected', this).val();
          self.view( vw );
          this.blur();
        });

      this._selGallery
        .change(function() {
          var gal = $(':selected', this).val();
          var galdat = self._galleries[gal];  // Array with all data indexes in gallery
          var dat = self._galleries[self._current.gallery][self._current.index];

          // Look for a matching data index
          var idx = 0;
          for( var i = 0; i < galdat.length; ++i ) {
            if( galdat[i] == dat ) {
              idx = i;
              break;
            }
          }

          self.show(gal, idx);
          this.blur();
        });

      this._code
        .on('click', 'a.plot', null, function ( evt ){
          var $a = $(this);
          var gal = $a.attr('gal');
          var idx = parseInt($a.attr('idx'));

				  self.show(gal, idx);
          return false;
        });

      // Shortcuts
      $('body', document).keydown(function (evt){
          // Don't respond when modifiers are pressed
          if( evt.ctrlKey || evt.metaKey || evt.altKey ) {
            return true;
          }

          // Check for function keys
          switch( true ) {
            case evt.keyCode == 27: // Escape
              self._selGallery
                .find('option:selected').attr('selected', false)
                .end()
                .find('option[value="*"]').attr('selected', true)
                .end()
                .trigger('change');
                break;
            case evt.keyCode == 70:  // F(ull) image
              self._selView
                .find('option:selected').attr('selected', false)
                .end()
                .find('option[value=img]').attr('selected', true)
                .end()
                .trigger('change');
              break;
            case evt.keyCode == 71:  // G  image / term
              self._selView
                .find('option:selected').attr('selected', false)
                .end()
                .find('option[value=both]').attr('selected', true)
                .end()
                .trigger('change');
              break;
            case evt.keyCode == 72:  // H(ide) image
              self._selView
                .find('option:selected').attr('selected', false)
                .end()
                .find('option[value=term]').attr('selected', true)
                .end()
                .trigger('change');
              break;
            case (evt.keyCode == 75 && evt.shiftKey) || evt.keyCode == 38: // Shift+K (vim super up)
							self.first();
							break
						case (evt.keyCode == 74 && evt.shiftKey) || evt.keyCode == 40: // Shift+J (vim super down)
							self.last();
							break;
						case evt.keyCode == 75 || evt.keyCode == 37: // k (vim up)
              self.prev();
              break;
            case evt.keyCode == 74 || evt.keyCode == 39: // j (vim down)
              self.next();
              break;
            case evt.shiftKey && evt.keyCode == 76: // Shift + L
							if( self._aLatestAll.length )
								document.location.href = self._aLatestAll.attr('href');
							else
								alert('Link to the latest simulation is not found, navigate manually to the last simulation');
							break;
            case evt.keyCode == 76: // l
							if( self._aLatest.length )
								document.location.href = self._aLatest.attr('href');
							else
								alert('Link to the simulation is not found, navigate manually to the simulation');
							break;
            case evt.keyCode == 82: // r
              if( self._data.length ) {
                var dat = self._galleries[self._current.gallery][self._current.index];
                var hash = '#' + self._data[dat].hash;
              } else {
                var hash = ''
              }
              var loc = document.location.href.substr(0, document.location.href.indexOf('#'));
              document.location.href = loc + hash;
              window.location.reload(true);
              break;
            case evt.keyCode == 73: // I
							if( self._aIndex.length )
								document.location.href = self._aIndex.attr('href');
							else
								alert('Link to the index is not found, navigate manually to the last simulation');
							break;
            case evt.keyCode == 86: // V
							var url= self._imglink.attr('href');
							if( evt.shiftKey )
								window.open(url, '_blank');
							else
								document.location.href = url;
							break;
            default:
							return true;
							break;
          }

          // Shortcut was pressed
					evt.preventDefault();
					return false;
      });
    }

    /**
     * Nutils.__destruct__()
     * Destruct the Nutils interface
     *
     * @return void
     */
    this.__destruct__ = function() {
      // Put links back
      this._aLatest.prependTo(this._code);
      this._aLatestAll.prependTo(this._code).after(' | ');
      this._aIndex.prependTo(this._code).after(' | ');

      // Remove additional HTML
      this._controls.remove();
      this._media.remove();
      this._code.off('click');
    };

    /**
     * Nutils.getGalleryName( url )
     * Create a gallery name from the filename
     * Strips all directories, numbers and the file extension
     *
     * ~/dot00a.png -> dot
     * ~/plot002.png -> plot
     *
     * @param string url
     * @return string gallery
     */
    this.getGalleryName = function ( url ) {
      var gallery = url.replace(/\d+\.\w{3,}$/g, '');
      return gallery;
    }

		/**
		 * Nutils.next()
		 * Show the next image
		 *
		 * @return void
		 */
		this.next = function (){
      var gal = this._current.gallery;
      var idx = this._current.index;
      var cnt = this._galleries[gal].length;

      // There is a next image
			if( (idx+1) < cnt ) {
      	++idx;
				this.show( gal, idx );
      }
		};

		/**
		 * Nutils.prev()
		 * Show the previous image
		 *
		 * @return void
		 */
		this.prev = function (){
			var gal = this._current.gallery;
      var idx = this._current.index;

			if( (idx - 1) >= 0 ) {
      	--idx;
				this.show( gal, idx );
      }
		};

		/**
		 * Nutils.first()
		 * Show the first image
		 *
		 * @return void
		 */
		this.first = function (){
			var gal = this._current.gallery;
			var idx = this._current.index;

			this.show( gal, 0 );
		};

		/**
		 * Nutils.last()
		 * Show the last image
		 *
		 * @return void
		 */
		this.last = function (){
			var gal = this._current.gallery;
			var idx = this._current.index;
      var cnt = this._galleries[gal].length;

			this.show( gal, (cnt-1) );
		};

		/**
		 * Nutils.view( vw )
		 * Change the view
		 *
     * @param string vw
		 * @return void
		 */
		this.view = function ( vw ){
			var vw = vw || 'both';
          vw = vw.replace(/^\s+|\s+$/g, '').toLowerCase();
      switch( vw ) {
        case 'term':
          this._code.add(this._media)
              .removeClass('imgview splitview')
              .addClass('termview')
          break;
        case 'img':
          this._code.add(this._media)
              .removeClass('termview splitview')
              .addClass('imgview')
          this.render();
          break;
        default:
          this._code.add(this._media)
              .removeClass('termview imgview')
              .addClass('splitview')
          this.render();
          break;
      }
		};

    /**
     * Nutils.show( gal, idx )
     * Show a plot by gallery name and plot idx
     * The following extra options are also available
     *
     *   Nutils.plot('current');
     *   Nutils.plot('first');
     *   Nutils.plot('last');
     *   Nutils.plot('next');
     *   Nutils.plot('prev');
     *
     * @param string gal
     * @param int idx
     * @return void
     */
    this.show = function ( gal, idx ) {
			var self = this;

      if( typeof this._galleries[gal] == 'undefined' )
        return false;

      if( typeof this._galleries[gal][idx] == 'undefined' )
        return false;

			var gallery = this._galleries[gal];
			var key 		= gallery[idx];
      var data 		= this._data[key];

      // Set the current gallery
      self._selGallery
          .find('option:selected')
          .attr('selected', false)
          .end()
          .find('option[value="' + gal + '"]')
          .attr('selected', true);

      // Set the current image
      if( data.src )
        this._imgCurrent.src = data.src;

      // If it is not an image
      if( self._iframe && ! data.img ) {
        // Popup the image container
        this._img.css('display', 'none');
        this._frame.css('display', 'block').attr('src', data.src );
      } else if( data.img ) {
        // Popup the image container
        this._img.css('display', 'block');
        this._frame.css('display', 'none');

        // Preloading
        var istart = Math.max(idx-this._npreload,0);
        var iend = Math.min(idx+this._npreload, gallery.length);
        for( var i = istart; i < iend; ++i ) {
          var ky = gallery[i];
          this._imgPreload.src = this._data[ky].src;
        }

        // If image was loaded, show it
        // otherwise show when loaded
        if( this._imgCurrent.width > 0 ) {
          this.render();
        } else {
          this._imgCurrent.onload = function (){ self.render(); };
          this._imgCurrent.onerror = function (){ self.render( false ); };
        }
      }

      // Focus on selected link
      this._links.removeClass('active');
      this._code.find('.line-active').removeClass('line-active');
      $('#nutils-viewer-' + key)
        .addClass('active')
        .focus()
        .parents('.line')
        .addClass('line-active');

      // Set to current gallery
      this._current.gallery = gal;
      this._current.index = idx;
    }

    /**
     * Nutils.render()
     * Show the plot and resize it to the media container
     *
     * @return Bool success
     */
		this.render = function ( display ) {
	    // Show the current image
			var gal = this._current.gallery;
			var idx = this._current.index;
			var key = this._galleries[gal][idx];
			var display = ( typeof display != 'undefined' ) ? display : true;

			// Check if the gallery exists
      if( typeof this._galleries[gal] == 'undefined' )
        return false;

			// Check if the plot exists
      if( typeof this._galleries[gal][idx] == 'undefined' )
        return false;

			// Get the index from the gallery
			var key = this._galleries[gal][idx];

			// Get the image and the data
      var data = this._data[key];

      // Image can be displayed
      if( display ) {
        var frameWidth = Math.max(this._media.width() - 20, 1);
        var frameHeight = Math.max(this._media.height() - 30, 1);
        var fx = Math.max(this._imgCurrent.width / frameWidth, 1);
        var fy = Math.max(this._imgCurrent.height / frameHeight, 1);
        var width = this._imgCurrent.width / fx;
        var height = this._imgCurrent.height / fy;

        // Make image the right size and show it
        var css = ( fx > fy )
                ? { 'width': width + 'px', 'height': 'auto' }
                : { 'width': 'auto', 'height': height + 'px' };
        this._img.css(css);

        if( this._img.attr('src') != this._imgCurrent.src ) {
          this._img.attr('src', this._imgCurrent.src);
          this._imglink
            .attr('href', this._imgCurrent.src);
        }
      }
		}
}

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var nutils = new Nutils();
$(function (){
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    } else {
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    }
	}
});