dev/js/src/match/table.js

/**
 * Table representation of morphological
 * annotations of a match.
 */
define(function () {
  var _TermRE = new RegExp("^(?:([^\/]+?)\/)?([^:]+?):(.+?)$");
  
  return {

    /**
     * Create new table view for a match
     * based on a snippet string.
     */
    create : function (snippet) {
      return Object.create(this)._init(snippet);
    },

    // Initialize table based on snippet
    _init : function (snippet) {
      // Create html for traversal
      var html = document.createElement("div");
      html.innerHTML = snippet;
      
      this._pos = 0;
      this._token = [];
      this._info = [];
      this._foundry = {};
      this._layer = {};
    
      // Parse the snippet
      this._parse(html.childNodes);      
    
      html.innerHTML = '';
      return this;
    },
    

    /**
     * Length of the table (columns),
     * aka the number of tokens
     * in the snippet.
     */
    length : function () {
      return this._pos;
    },

    /**
     * Get the token in the snippet
     * At a given position.
     *
     * @param pos
     */
    getToken : function (pos) {
      if (pos === undefined)
        return this._token;
      return this._token[pos];
    },

    /**
     * Get the annotation of a token
     * in the snippet based on the position,
     * the foundry, and the layer.
     *
     * @param pos
     * @param foundry
     * @param layer
     */
    getValue : function (pos, foundry, layer) {
      return this._info[pos][foundry + '/' + layer]
    },

    // Parse the snippet
    _parse : function (children) {

      // Get all children
      for (var i in children) {
        var c = children[i];

        // Create object on position unless it exists
        if (this._info[this._pos] === undefined) {
          this._info[this._pos] = {};
        };

        // Store at position in foundry/layer as array
        var found = this._info[this._pos];

        // Element with title
        if (c.nodeType === 1) {
          if (c.getAttribute("title") &&
              _TermRE.exec(c.getAttribute("title"))) {

            // Fill position with info
            var foundry, layer, value;
            if (RegExp.$2) {
              foundry = RegExp.$1;
              layer   = RegExp.$2;
            }
            else {
              foundry = "base";
              layer   = RegExp.$1
            };

            value = RegExp.$3;
      
            if (found[foundry + "/" + layer] === undefined) {
              found[foundry + "/" + layer] = [value];
            }
            else {
              if (found[foundry + "/" + layer].indexOf(value) === -1) {
                // Push value to foundry/layer at correct position
                found[foundry + "/" + layer].push(value);
              };
            }

            // Set foundry
            if (this._foundry[foundry] === undefined)
              this._foundry[foundry] = {};
            this._foundry[foundry][layer] = 1;

            // Set layer
            if (this._layer[layer] === undefined)
              this._layer[layer] = {};
            this._layer[layer][foundry] = 1;
          };

          // depth search
          if (c.hasChildNodes())
            this._parse(c.childNodes);
        }

        // Leaf node
        // store string on position and go to next string
        else if (c.nodeType === 3) {
          if (c.nodeValue.match(/[a-z0-9]/i))
            this._token[this._pos++] = c.nodeValue;
        };
      };

      delete this._info[this._pos];
    },


    /**
     * Get HTML table view of annotations.
     */
    element : function () {
      if (this._element !== undefined)
        return this._element;

      // First the legend table
      var d = document;
      var table = d.createElement('table');

      // Single row in head
      var tr = table.appendChild(d.createElement('thead'))
          .appendChild(d.createElement('tr'));

      // Add cell to row
      var addCell = function (type, name) {
        var c = this.appendChild(d.createElement(type))
        if (name === undefined)
          return c;

        if (name instanceof Array && name[1] !== undefined) {

          // There are multiple values to add
          c.classList.add('matchkeyvalues');
          for (var n = 0; n < name.length; n++) {
            var text = d.createTextNode(name[n]);
            var e = c.appendChild(d.createElement('div'));
            e.appendChild(text);
          };
        }
        else {
          c.appendChild(d.createTextNode(name));
        };

        return c;
      };

      tr.addCell = addCell;

      // Add header information
      tr.addCell('th', 'Foundry');
      tr.addCell('th', 'Layer');

      // Add tokens
      for (var i in this._token) {
        tr.addCell('th', this.getToken(i));
      };
      
      var tbody = table.appendChild(
        d.createElement('tbody')
      );

      var foundryList = Object.keys(this._foundry).sort();

      var ah = KorAP.annotationHelper || {};

      for (var f = 0; f < foundryList.length; f++) {
        var foundry = foundryList[f];
        var layerList =
            Object.keys(this._foundry[foundry]).sort();

        for (var l = 0; l < layerList.length; l++) {
          var layer = layerList[l];
          tr = tbody.appendChild(
            d.createElement('tr')
          );
          tr.setAttribute('tabindex', 0);
          tr.addCell = addCell;

          tr.addCell('th', foundry);
          tr.addCell('th', layer);

          var key = foundry + '/' + layer + '=';
          var anno = ah[key];

          for (var v = 0; v < this.length(); v++) {

            // Get the cell value
            var value = this.getValue(v, foundry, layer);

            // Add cell to row
            var cell = tr.addCell(
              'td',
              value 
            );

            // Iterate over all annotations and add the descriptions
            if (anno) {

              // This is a classic hash-lookup-case, but we have
              // to deal with lists ...
              for (var i = 0; i < anno.length; i++) {
                if (anno[i] &&
                    anno[i][0] &&
                    anno[i][2] &&
                    anno[i][0] == value) {
                  cell.setAttribute('title', anno[i][2]);
                  break;
                };
              };
            };
          };
        };
      };

      return this._element = table;
    }
  };
});