solid-panes/lib/humanReadablePane.js

Solid-compatible Panes: applets and views for the mashlib and databrowser

"use strict";

/*   Human-readable Pane
 **
 **  This outline pane contains the document contents for an HTML document
 **  This is for peeking at a page, because the user might not want to leave the data browser.
 */
var UI = require('solid-ui');

var $rdf = require('rdflib');

module.exports = {
  icon: UI.icons.originalIconBase + 'tango/22-text-x-generic.png',
  name: 'humanReadable',
  label: function label(subject, context) {
    var kb = context.session.store;
    var ns = UI.ns; //   See also the source pane, which has lower precedence.

    var allowed = ['text/plain', 'text/html', 'application/xhtml+xml', 'image/png', 'image/jpeg', 'application/pdf', 'video/mp4'];

    var hasContentTypeIn = function hasContentTypeIn(kb, x, displayables) {
      var cts = kb.fetcher.getHeader(x, 'content-type');

      if (cts) {
        for (var j = 0; j < cts.length; j++) {
          for (var k = 0; k < displayables.length; k++) {
            if (cts[j].indexOf(displayables[k]) >= 0) {
              return true;
            }
          }
        }
      }

      return false;
    }; // This data could come from a fetch OR from ldp container


    var hasContentTypeIn2 = function hasContentTypeIn2(kb, x, displayables) {
      var t = kb.findTypeURIs(subject);

      for (var k = 0; k < displayables.length; k++) {
        if ($rdf.Util.mediaTypeClass(displayables[k]).uri in t) {
          return true;
        }
      }

      return false;
    };

    if (!subject.uri) return null; // no bnodes

    var t = kb.findTypeURIs(subject);
    if (t[ns.link('WebPage').uri]) return 'view';

    if (hasContentTypeIn(kb, subject, allowed) || hasContentTypeIn2(kb, subject, allowed)) {
      return 'View';
    }

    return null;
  },
  render: function render(subject, context) {
    var myDocument = context.dom;
    var div = myDocument.createElement('div');
    var kb = context.session.store; //  @@ When we can, use CSP to turn off scripts within the iframe

    div.setAttribute('class', 'docView');
    var iframe = myDocument.createElement('IFRAME');
    iframe.setAttribute('src', subject.uri); // allow-same-origin

    iframe.setAttribute('class', 'doc');
    var cts = kb.fetcher.getHeader(subject.doc(), 'content-type');
    var ct = cts ? cts[0] : null;

    if (ct) {
      console.log('humanReadablePane: c-t:' + ct);
    } else {
      console.log('humanReadablePane: unknown content-type?');
    } // @@ Note below - if we set ANY sandbox, then Chrome and Safari won't display it if it is PDF.
    // https://developer.mozilla.org/en-US/docs/Web/HTML/Element/iframe
    // You can;'t have any sandbox and allow plugins.
    // We could sandbox only HTML files I suppose.
    // HTML5 bug: https://lists.w3.org/Archives/Public/public-html/2011Jun/0330.html
    // iframe.setAttribute('sandbox', 'allow-same-origin allow-forms'); // allow-scripts ?? no documents should be static


    iframe.setAttribute('style', 'resize = both; height: 120em; width:80em;'); //        iframe.setAttribute('height', '480')
    //        iframe.setAttribute('width', '640')

    var tr = myDocument.createElement('TR');
    tr.appendChild(iframe);
    div.appendChild(tr);
    return div;
  }
}; // ends
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