root/js/componentload.js

   1 // Global state variables
   2 var selectedTextID;
   3 var selectedTextInfo;
   4 var selectedTextEditable;
   5 var selectedStemmaID = -1;
   6 var stemmata = [];
   7
   8 // Load the names of the appropriate traditions into the directory div.
   9 function refreshDirectory () {
  10         var lmesg = $('#loading_message').clone();
  11         $('#directory').empty().append( lmesg.contents() );
  12     $('#directory').load( _get_url(["directory"]),
  13         function(response, status, xhr) {
  14                         if (status == "error") {
  15                                 var msg = "An error occurred: ";
  16                                 $("#directory").html(msg + xhr.status + " " + xhr.statusText);
  17                         } else {
  18                                 if( textOnLoad != "" ) {
  19                                         // Call the click callback for the relevant text, if it is
  20                                         // in the page.
  21                                         $('#'+textOnLoad).click();
  22                                         textOnLoad = "";
  23                                 }
  24                         }
  25                 }
  26         );
  27 }
  28
  29 // Load a tradition with its information and stemmata into the tradition
  30 // view pane. Calls load_textinfo.
  31 function loadTradition( textid, textname, editable ) {
  32         selectedTextID = textid;
  33         selectedTextEditable = editable;
  34     // First insert the placeholder image and register an error handler
  35     $('#textinfo_load_status').empty();
  36     $('#stemma_graph').empty();
  37     $('#textinfo_waitbox').show();
  38     $('#textinfo_container').hide().ajaxError(
  39         function(event, jqXHR, ajaxSettings, thrownError) {
  40         if( ajaxSettings.url.indexOf( 'textinfo' ) > -1 && ajaxSettings.type == 'GET'  ) {
  41                         $('#textinfo_waitbox').hide();
  42                         $('#textinfo_container').show();
  43                         display_error( jqXHR, $("#textinfo_load_status") );
  44         }
  45     });
  46
  47     // Hide the functionality that is irrelevant
  48     if( editable ) {
  49         $('#open_stemma_add').show();
  50         $('#open_textinfo_edit').show();
  51         $('#relatebutton_label').text('View collation and edit relationships');
  52     } else {
  53         $('#open_stemma_add').hide();
  54         $('#open_stemweb_ui').hide();
  55         $('#query_stemweb_ui').hide();
  56         $('#open_textinfo_edit').hide();
  57         $('#relatebutton_label').text('View collation and relationships');
  58     }
  59
  60     // Then get and load the actual content.
  61     // TODO: scale #stemma_graph both horizontally and vertically
  62     // TODO: load svgs from SVG.Jquery (to make scaling react in Safari)
  63     $.getJSON( _get_url([ "textinfo", textid ]), function (textdata) {
  64         // Add the scalar data
  65         selectedTextInfo = textdata;
  66         load_textinfo();
  67         // Add the stemma(ta)
  68         stemmata = textdata.stemmata;
  69         if( stemmata.length ) {
  70                 selectedStemmaID = 0;
  71         } else {
  72                 selectedStemmaID = -1;
  73                 }
  74                 load_stemma( selectedStemmaID );
  75         // Set up the relationship mapper button
  76                 $('#run_relater').attr( 'action', _get_url([ "relation", textid ]) );
  77                 // Set up the download button
  78                 $('#dl_tradition').attr( 'href', _get_url([ "download", textid ]) );
  79                 $('#dl_tradition').attr( 'download', selectedTextInfo.name + '.xml' );
  80         });
  81 }
  82
  83 // Load the metadata about a tradition into the appropriate div.
  84 function load_textinfo() {
  85         $('#textinfo_waitbox').hide();
  86         $('#textinfo_load_status').empty();
  87         $('#textinfo_container').show();
  88         // The tradition name should appear here and should be identical in the
  89         // corresponding directory span. In case the name was just changed...
  90         $('.texttitle').empty().append( selectedTextInfo.name );
  91         $('#' + selectedTextID).empty().append( selectedTextInfo.name );
  92         // Witnesses
  93         $('#witness_num').empty().append( selectedTextInfo.witnesses.size );
  94         $('#witness_list').empty().append( selectedTextInfo.witnesses.join( ', ' ) );
  95         // Who the owner is
  96         $('#owner_id').empty().append('no one');
  97         if( selectedTextInfo.owner ) {
  98                 var owneremail = selectedTextInfo.owner;
  99                 var chop = owneremail.indexOf( '@' );
 100                 if( chop > -1 ) {
 101                         owneremail = owneremail.substr( 0, chop + 1 ) + '...';
 102                 }
 103                 $('#owner_id').empty().append( owneremail );
 104         }
 105         // Whether or not it is public
 106         $('#not_public').empty();
 107         if( selectedTextInfo['public'] == false ) {
 108                 $('#not_public').append('NOT ');
 109         }
 110         // What language setting it has, if any
 111         $('#marked_language').empty().append('no language set');
 112         if( selectedTextInfo.language && selectedTextInfo.language != 'Default' ) {
 113                 $('#marked_language').empty().append( selectedTextInfo.language );
 114         }
 115 }
 116
 117 // Enable / disable the appropriate buttons for paging through the stemma.
 118 function show_stemmapager () {
 119       $('.pager_left_button').unbind('click').addClass( 'greyed_out' );
 120       $('.pager_right_button').unbind('click').addClass( 'greyed_out' );
 121       if( selectedStemmaID > 0 ) {
 122               $('.pager_left_button').click( function () {
 123                       load_stemma( selectedStemmaID - 1, selectedTextEditable );
 124               }).removeClass( 'greyed_out' );
 125       }
 126       if( selectedStemmaID + 1 < stemmata.length ) {
 127               $('.pager_right_button').click( function () {
 128                       load_stemma( selectedStemmaID + 1, selectedTextEditable );
 129               }).removeClass( 'greyed_out' );
 130       }
 131 }
 132
 133 // Load a given stemma SVG into the stemmagraph box.
 134 function load_stemma( idx ) {
 135         // Load the stemma at idx
 136         selectedStemmaID = idx;
 137         show_stemmapager( selectedTextEditable );
 138         $('#open_stemma_edit').hide();
 139         $('#run_stexaminer').hide();
 140         $('#stemma_identifier').empty();
 141         // Add the relevant Stemweb functionality
 142         if( selectedTextEditable ) {
 143                 switch_stemweb_ui();
 144         }
 145         if( idx > -1 ) {
 146                 // Load the stemma and its properties
 147                 var stemmadata = stemmata[idx];
 148                 if( selectedTextEditable ) {
 149                         $('#open_stemma_edit').show();
 150                 }
 151                 if( stemmadata.directed ) {
 152                         // Stexaminer submit action
 153                         var stexpath = _get_url([ "stexaminer", selectedTextID, idx ]);
 154                         $('#run_stexaminer').attr( 'action', stexpath );
 155                         $('#run_stexaminer').show();
 156                 }
 157                 loadSVG( stemmadata.svg );
 158                 $('#stemma_identifier').text( stemmadata.name );
 159         setTimeout( 'start_element_height = $("#stemma_graph .node")[0].getBBox().height;', 500 );
 160         }
 161 }
 162
 163 function switch_stemweb_ui() {
 164         if( selectedTextInfo.stemweb_jobid == 0 ) {
 165                 // We want to run Stemweb.
 166                 $('#open_stemweb_ui').show();
 167                 $('#query_stemweb_ui').hide();
 168                 if( ! $('#stemweb-ui-dialog').dialog('isOpen') ) {
 169                         $('#call_stemweb').show()
 170                         $('#stemweb_run_button').show();
 171                 }
 172         } else {
 173                 $('#query_stemweb_ui').show();
 174                 $('#open_stemweb_ui').hide();
 175                 $('#call_stemweb').hide();
 176                 $('#stemweb_run_button').hide();
 177         }
 178 }
 179
 180 function query_stemweb_progress() {
 181         var requrl = _get_url([ "stemweb", "query", selectedTextInfo.stemweb_jobid ]);
 182         $('#stemweb-ui-dialog').dialog('open');
 183         $('#stemweb_run_status').empty().append(
 184                                 _make_message( 'notification', 'Querying Stemweb for calculation progress...') );
 185         $.getJSON( requrl, function (data) {
 186                 process_stemweb_result( data );
 187         });
 188 }
 189
 190 function process_stemweb_result(data) {
 191         // Look for a status message, either success, running, or notfound.
 192         if( data.status === 'success' ) {
 193                 // Add the new stemmata to the textinfo and tell the user.
 194                 selectedTextInfo.stemweb_jobid = 0;
 195                 if( data.stemmata.length > 0 ) {
 196                         stemmata = stemmata.concat( data.stemmata );
 197                         if( selectedStemmaID == -1 ) {
 198                                 // We have a stemma for the first time; load the first one.
 199                                 load_stemma( 0, true );
 200                         } else {
 201                                 // Move to the index of the first added stemma.
 202                                 var newIdx = stemmata.length - data.stemmata.length;
 203                                 load_stemma( newIdx, true );
 204                         }
 205                         // Hide the call dialog no matter how we got here
 206                         $('#call_stemweb').hide()
 207                         $('#stemweb_run_button').hide();
 208                         $('#stemweb_run_status').empty().append(
 209                                 _make_message( 'notification', 'You have one or more new stemmata!' ) );
 210                 } else {
 211                         $('#stemweb_run_status').empty().append(
 212                                 _make_message( 'warning', 'Stemweb run finished with no stemmata...huh?!' ) );
 213                 }
 214         } else if( data.status === 'running' ) {
 215                 // Just tell the user.
 216                 $('#stemweb_run_status').empty().append(
 217                                 _make_message( 'warning', 'Your Stemweb query is still running!' ) );
 218         } else if( data.status === 'notfound' ) {
 219                 // Ask the user to refresh, for now.
 220                 $('#stemweb_run_status').empty().append(
 221                                 _make_message( 'warning', 'Your Stemweb query probably finished and reported back. Please reload to check.' ) );
 222         } else if( data.status === 'failed' ) {
 223                 selectedTextInfo.stemweb_jobid = 0;
 224                 failureMsg = 'Your stemweb query failed';
 225                 if( data.message ) {
 226                         failureMsg = failureMsg + ' with the following message: ' + data.message
 227                 } else {
 228                         failureMsg = failureMsg + ' without telling us why.'
 229                 }
 230                 $('#stemweb_run_status').empty().append(
 231                                 _make_message( 'error', failureMsg ) );
 232         }
 233 }
 234
 235 function _make_message( type, msg ) {
 236         theMessage = $('<span>').attr( 'class', type );
 237         theMessage.append( msg );
 238         return theMessage;
 239 }
 240
 241 // Load the SVG we are given
 242 function loadSVG(svgData) {
 243         var svgElement = $('#stemma_graph');
 244
 245         $(svgElement).svg('destroy');
 246
 247         $(svgElement).svg({
 248                 loadURL: svgData,
 249                 onLoad : function () {
 250                         var theSVG = svgElement.find('svg');
 251                         var svgoffset = theSVG.offset();
 252                         var browseroffset = 1;
 253                         // Firefox needs a different offset, stupidly enough
 254                         if( navigator.userAgent.indexOf('Firefox') > -1 ) {
 255                                 browseroffset = 3; // works for tall images
 256                                 // ...but if the SVG is wider than it is tall, Firefox treats
 257                                 // the top as being the top of the graph, loaded into the middle
 258                                 // of the canvas, but then the margin at the top of the canvas
 259                                 // extends upward. So we have to find the actual top of the canvas
 260                                 // and correct for *that* instead.
 261                                 var vbdim = svgElement.svg().svg('get').root().viewBox.baseVal;
 262                                 if( vbdim.height < vbdim.width ) {
 263                                         var vbscale = svgElement.width() / vbdim.width;
 264                                         var vbrealheight = vbdim.height * vbscale;
 265                                         browseroffset = 3 + ( svgElement.height() - vbrealheight ) / 2;
 266                                 }
 267                         }
 268                         var topoffset = theSVG.position().top - svgElement.position().top - browseroffset;
 269                         theSVG.offset({ top: svgoffset.top - topoffset, left: svgoffset.left });
 270                         set_stemma_interactive( theSVG );
 271                 }
 272         });
 273 }
 274
 275 function set_stemma_interactive( svg_element ) {
 276         if( selectedTextEditable ) {
 277                 $( "#root_tree_dialog_button_ok" ).click( function() {
 278                         var requrl = _get_url([ "stemmaroot", selectedTextID, selectedStemmaID ]);
 279                         var targetnode = $('#root_tree_dialog').data( 'selectedNode' );
 280                         $.post( requrl, { root: targetnode }, function (data) {
 281                                 // Reload the new stemma
 282                                 stemmata[selectedStemmaID] = data;
 283                                 load_stemma( selectedStemmaID );
 284                                 // Put away the dialog
 285                                 $('#root_tree_dialog').data( 'selectedNode', null ).hide();
 286                         } );
 287                 } ).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
 288                         if( ajaxSettings.url.indexOf( 'stemmaroot' ) > -1
 289                                 && ajaxSettings.type == 'POST' ) {
 290                                 display_error( jqXHR, $("#stemma_load_status") );
 291                         }
 292                 } );
 293                 // TODO Clear error at some appropriate point
 294                 $.each( $( 'ellipse', svg_element ), function(index) {
 295                         var ellipse = $(this);
 296                         var g = ellipse.parent( 'g' );
 297                         g.click( function(evt) {
 298                                 if( typeof root_tree_dialog_timeout !== 'undefined' ) { clearTimeout( root_tree_dialog_timeout ) };
 299                                 g.unbind( 'mouseleave' );
 300                                 var dialog = $( '#root_tree_dialog' );
 301                                 // Note which node triggered the dialog
 302                                 dialog.data( 'selectedNode', g.attr('id') );
 303                                 // Position the dialog
 304                                 dialog.hide();
 305                                 dialog.css( 'top', evt.pageY + 3 );
 306                                 dialog.css( 'left', evt.pageX + 3 );
 307                                 dialog.show();
 308                                 root_tree_dialog_timeout = setTimeout( function() {
 309                                         $( '#root_tree_dialog' ).data( 'selectedNode', null ).hide();
 310                                         ellipse.removeClass( 'stemma_node_highlight' );
 311                                         g.mouseleave( function() { ellipse.removeClass( 'stemma_node_highlight' ) } );
 312                                 }, 3000 );
 313                         } );
 314                         g.mouseenter( function() {
 315                                 $( 'ellipse.stemma_node_highlight' ).removeClass( 'stemma_node_highlight' );
 316                                 ellipse.addClass( 'stemma_node_highlight' )
 317                         } );
 318                         g.mouseleave( function() { ellipse.removeClass( 'stemma_node_highlight' ) } );
 319                 } );
 320         }
 321 }
 322
 323 // General-purpose error-handling function.
 324 // TODO make sure this gets used throughout, where appropriate.
 325 function display_error( jqXHR, el ) {
 326         var errmsg;
 327         if( jqXHR.responseText == "" ) {
 328                 errmsg = "perhaps the server went down?"
 329         } else {
 330                 var errobj;
 331                 try {
 332                         errobj = jQuery.parseJSON( jqXHR.responseText );
 333                         errmsg = errobj.error;
 334                 } catch ( parse_err ) {
 335                         errmsg = "something went wrong on the server."
 336                 }
 337         }
 338         var msghtml = $('<span>').attr('class', 'error').text( "An error occurred: " + errmsg );
 339         $(el).empty().append( msghtml ).show();
 340 }
 341
 342 // Event to enable the upload button when a file has been selected
 343 function file_selected( e ) {
 344         if( e.files.length == 1 ) {
 345                 $('#upload_button').button('enable');
 346                 $('#new_file_name_container').html( '<span id="new_file_name">' + e.files[0].name + '</span>' );
 347         } else {
 348                 $('#upload_button').button('disable');
 349                 $('#new_file_name_container').html( '(Use \'pick file\' to select a tradition file to upload.)' );
 350         }
 351 }
 352
 353 // Implement our own AJAX method that uses the features of XMLHttpRequest2
 354 // but try to let it have a similar interface to jquery.post
 355 // The data var needs to be a FormData() object.
 356 // The callback will be given a single argument, which is the response data
 357 // of the given type.
 358
 359 function post_xhr2( url, data, cb, type ) {
 360         if( !type ) {
 361                 type = 'json';
 362         }
 363         var xhr = new XMLHttpRequest();
 364         // Set the expected response type
 365         if( type === 'data' ) {
 366                 xhr.responseType = 'blob';
 367         } else if( type === 'xml' ) {
 368                 xhr.responseType = 'document';
 369         }
 370         // Post the form
 371         // Gin up an AJAX settings object
 372         $.ajaxSetup({ url: url, type: 'POST' });
 373         xhr.open( 'POST', url, true );
 374         // Handle the results
 375         xhr.onload = function( e ) {
 376                 // Get the response and parse it
 377                 // Call the callback with the response, whatever it was
 378                 var xhrs = e.target;
 379                 if( xhrs.status > 199 && xhrs.status < 300  ) { // Success
 380                         var resp;
 381                         if( type === 'json' ) {
 382                                 resp = $.parseJSON( xhrs.responseText );
 383                         } else if ( type === 'xml' ) {
 384                                 resp = xhrs.responseXML;
 385                         } else if ( type === 'text' ) {
 386                                 resp = xhrs.responseText;
 387                         } else {
 388                                 resp = xhrs.response;
 389                         }
 390                         cb( resp );
 391                 } else {
 392                         // Trigger the ajaxError...
 393                         _trigger_ajaxerror( e );
 394                 }
 395         };
 396         xhr.onerror = _trigger_ajaxerror;
 397         xhr.onabort = _trigger_ajaxerror;
 398         xhr.send( data );
 399 }
 400
 401 function _trigger_ajaxerror( e ) {
 402         var xhr = e.target;
 403         var thrown = xhr.statusText || 'Request error';
 404         jQuery.event.trigger( 'ajaxError', [ xhr, $.ajaxSettings, thrown ]);
 405 }
 406
 407 function upload_new () {
 408         // Serialize the upload form, get the file and attach it to the request,
 409         // POST the lot and handle the response.
 410         var newfile = $('#new_file').get(0).files[0];
 411         var reader = new FileReader();
 412         reader.onload = function( evt ) {
 413                 var data = new FormData();
 414                 $.each( $('#new_tradition').serializeArray(), function( i, o ) {
 415                                 data.append( o.name, o.value );
 416                         });
 417                 data.append( 'file', newfile );
 418                 var upload_url = _get_url([ 'newtradition' ]);
 419                 post_xhr2( upload_url, data, function( ret ) {
 420                         if( ret.id ) {
 421                                 $('#upload-collation-dialog').dialog('close');
 422                                 refreshDirectory();
 423                                 loadTradition( ret.id, ret.name, 1 );
 424                         } else if( ret.error ) {
 425                                 $('#upload_status').empty().append(
 426                                         $('<span>').attr('class', 'error').append( ret.error ) );
 427                         }
 428                 }, 'json' );
 429         };
 430         reader.onerror = function( evt ) {
 431                 var err_resp = 'File read error';
 432                 if( e.name == 'NotFoundError' ) {
 433                         err_resp = 'File not found';
 434                 } else if ( e.name == 'NotReadableError' ) {
 435                         err_resp == 'File unreadable - is it yours?';
 436                 } else if ( e.name == 'EncodingError' ) {
 437                         err_resp == 'File cannot be encoded - is it too long?';
 438                 } else if ( e.name == 'SecurityError' ) {
 439                         err_resp == 'File read security error';
 440                 }
 441                 // Fake a jqXHR object that we can pass to our generic error handler.
 442                 var jqxhr = { responseText: '{error:"' + err_resp + '"}' };
 443                 display_error( jqxhr, $('#upload_status') );
 444                 $('#upload_button').button('disable');
 445         }
 446
 447         reader.readAsBinaryString( newfile );
 448 }
 449
 450 // Utility function to neatly construct an application URL
 451 function _get_url( els ) {
 452         return basepath + els.join('/');
 453 }
 454
 455 // TODO Attach unified ajaxError handler to document
 456 $(document).ready( function() {
 457         // See if we have the browser functionality we need
 458         // TODO Also think of a test for SVG readiness
 459         if( !!window.FileReader && !!window.File ) {
 460                 $('#compatibility_check').empty();
 461         }
 462
 463     // hide dialog not yet in use
 464     $('#root_tree_dialog').hide();
 465
 466     // call out to load the directory div
 467     $('#textinfo_container').hide();
 468     $('#textinfo_waitbox').hide();
 469         refreshDirectory();
 470
 471         // Set up the textinfo edit dialog
 472         $('#textinfo-edit-dialog').dialog({
 473                 autoOpen: false,
 474                 height: 200,
 475                 width: 300,
 476                 modal: true,
 477                 buttons: {
 478                         Save: function (evt) {
 479                                 $("#edit_textinfo_status").empty();
 480                                 var mybuttons = $(evt.target).closest('button').parent().find('button');
 481                                 mybuttons.button( 'disable' );
 482                                 var requrl = _get_url([ "textinfo", selectedTextID ]);
 483                                 var reqparam = $('#edit_textinfo').serialize();
 484                                 $.post( requrl, reqparam, function (data) {
 485                                         // Reload the selected text fields
 486                                         selectedTextInfo = data;
 487                                         load_textinfo();
 488                                         // Reenable the button and close the form
 489                                         mybuttons.button("enable");
 490                                         $('#textinfo-edit-dialog').dialog('close');
 491                                 }, 'json' );
 492                         },
 493                         Cancel: function() {
 494                                 $('#textinfo-edit-dialog').dialog('close');
 495                         }
 496                 },
 497                 open: function() {
 498                         $("#edit_textinfo_status").empty();
 499                         // Populate the form fields with the current values
 500                         // edit_(name, language, public, owner)
 501                         $.each([ 'name', 'language', 'owner' ], function( idx, k ) {
 502                                 var fname = '#edit_' + k;
 503                                 // Special case: language Default is basically language null
 504                                 if( k == 'language' && selectedTextInfo[k] == 'Default' ) {
 505                                         $(fname).val( "" );
 506                                 } else {
 507                                         $(fname).val( selectedTextInfo[k] );
 508                                 }
 509                         });
 510                         if( selectedTextInfo['public'] == true ) {
 511                                 $('#edit_public').attr('checked','true');
 512                         } else {
 513                                 $('#edit_public').removeAttr('checked');
 514                         }
 515                 },
 516         }).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
 517                 $(event.target).parent().find('.ui-button').button("enable");
 518         if( ajaxSettings.url.indexOf( 'textinfo' ) > -1
 519                 && ajaxSettings.type == 'POST' ) {
 520                         display_error( jqXHR, $("#edit_textinfo_status") );
 521         }
 522         });
 523
 524
 525         // Set up the stemma editor dialog
 526         $('#stemma-edit-dialog').dialog({
 527                 autoOpen: false,
 528                 height: 700,
 529                 width: 600,
 530                 modal: true,
 531                 buttons: {
 532                         Save: function (evt) {
 533                                 $("#edit_stemma_status").empty();
 534                                 var mybuttons = $(evt.target).closest('button').parent().find('button');
 535                                 mybuttons.button( 'disable' );
 536                                 var stemmaseq = $('#stemmaseq').val();
 537                                 var requrl = _get_url([ "stemma", selectedTextID, stemmaseq ]);
 538                                 var reqparam = { 'dot': $('#dot_field').val() };
 539                                 // TODO We need to stash the literal SVG string in stemmata
 540                                 // somehow. Implement accept header on server side to decide
 541                                 // whether to send application/json or application/xml?
 542                                 $.post( requrl, reqparam, function (data) {
 543                                         // We received a stemma SVG string in return.
 544                                         // Update the current stemma sequence number
 545                                         selectedStemmaID = data.stemmaid;
 546                                         delete data.stemmaid;
 547                                         // Stash the answer in the appropriate spot in our stemma array
 548                                         stemmata[selectedStemmaID] = data;
 549                                         // Display the new stemma
 550                                         load_stemma( selectedStemmaID, true );
 551                                         // Reenable the button and close the form
 552                                         mybuttons.button("enable");
 553                                         $('#stemma-edit-dialog').dialog('close');
 554                                 }, 'json' );
 555                         },
 556                         Cancel: function() {
 557                                 $('#stemma-edit-dialog').dialog('close');
 558                         }
 559                 },
 560                 open: function(evt) {
 561                         $("#edit_stemma_status").empty();
 562                         var stemmaseq = $('#stemmaseq').val();
 563                         if( stemmaseq == 'n' ) {
 564                                 // If we are creating a new stemma, populate the textarea with a
 565                                 // bare digraph.
 566                                 $(evt.target).dialog('option', 'title', 'Add a new stemma')
 567                                 $('#dot_field').val( "digraph \"NAME STEMMA HERE\" {\n\n}" );
 568                         } else {
 569                                 // If we are editing a stemma, grab its stemmadot and populate the
 570                                 // textarea with that.
 571                                 $(evt.target).dialog('option', 'title', 'Edit selected stemma')
 572                                 $('#dot_field').val( 'Loading, please wait...' );
 573                                 var doturl = _get_url([ "stemmadot", selectedTextID, stemmaseq ]);
 574                                 $.getJSON( doturl, function (data) {
 575                                         // Re-insert the line breaks
 576                                         var dotstring = data.dot.replace(/\|n/gm, "\n");
 577                                         $('#dot_field').val( dotstring );
 578                                 });
 579                         }
 580                 },
 581         }).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
 582                 $(event.target).parent().find('.ui-button').button("enable");
 583         if( ajaxSettings.url.indexOf( 'stemma' ) > -1
 584                 && ajaxSettings.type == 'POST' ) {
 585                         display_error( jqXHR, $("#edit_stemma_status") );
 586         }
 587         });
 588
 589         $('#stemweb-ui-dialog').dialog({
 590                 autoOpen: false,
 591                 height: 'auto',
 592                 width: 520,
 593                 modal: true,
 594                 buttons: {
 595                         Run: {
 596                                 id: 'stemweb_run_button',
 597                                 text: 'Run',
 598                                 click: function (evt) {
 599                                 $("#stemweb_run_status").empty();
 600                                 var mybuttons = $(evt.target).closest('button').parent().find('button');
 601                                 mybuttons.button( 'disable' );
 602                                 var requrl = _get_url([ "stemweb", "request" ]);
 603                                 var reqparam = $('#call_stemweb').serialize();
 604                                 // TODO We need to stash the literal SVG string in stemmata
 605                                 // somehow. Implement accept header on server side to decide
 606                                 // whether to send application/json or application/xml?
 607                                 $.getJSON( requrl, reqparam, function (data) {
 608                                         mybuttons.button("enable");
 609                                         if( 'jobid' in data ) {
 610                                                 // There is a pending job.
 611                                                 selectedTextInfo.stemweb_jobid = data.jobid;
 612                                                 $('#stemweb_run_status').empty().append(
 613                                                         _make_message( 'notification', "Your request has been submitted to Stemweb.\nThe resulting tree will appear in due course." ) );
 614                                                 // Reload the current stemma to rejigger the buttons
 615                                                 switch_stemweb_ui();
 616                                         } else {
 617                                                 // We appear to have an answer; process it.
 618                                                 process_stemweb_result( data );
 619                                         }
 620                                 }, 'json' );
 621                                 },
 622                         },
 623                         Close: {
 624                                 id: 'stemweb_close_button',
 625                                 text: 'Close',
 626                                 click: function() {
 627                                         $('#stemweb-ui-dialog').dialog('close');
 628                                         switch_stemweb_ui();
 629                                 },
 630                         },
 631                 },
 632                 create: function(evt) {
 633                         // Call out to Stemweb to get the algorithm options, with which we
 634                         // populate the form.
 635                         var algorithmTypes = {};
 636                         var algorithmArgs = {};
 637                         var requrl = _get_url([ "stemweb", "available" ]);
 638                         $.getJSON( requrl, function( data ) {
 639                                 $.each( data, function( i, o ) {
 640                                         if( o.model === 'algorithms.algorithm' ) {
 641                                                 // it's an algorithm.
 642                                                 algorithmTypes[ o.pk ] = o.fields;
 643                                         } else if( o.model == 'algorithms.algorithmarg' && o.fields.external ) {
 644                                                 // it's an option for an algorithm that we should display.
 645                                                 algorithmArgs[ o.pk ] = o.fields;
 646                                         }
 647                                 });
 648                                 // TODO if it is an empty object, disable Stemweb entirely.
 649                                 if( !jQuery.isEmptyObject( algorithmTypes ) ) {
 650                                         $.each( algorithmTypes, function( pk, fields ) {
 651                                                 var algopt = $('<option>').attr( 'value', pk ).append( fields.name );
 652                                                 $('#stemweb_algorithm').append( algopt );
 653                                         });
 654                                         // Set up the relevant options for whichever algorithm is chosen.
 655                                         // "key" -> form name, option ID "stemweb_$key_opt"
 656                                         // "name" -> form label
 657                                         $('#stemweb_algorithm_help').click( function() {
 658                                                 $('#stemweb_algorithm_desc_text').toggle( 'blind' );
 659                                                 });
 660                                         $('#stemweb_algorithm').change( function() {
 661                                                 var pk = $(this).val();
 662                                                 // Display a link to the popup description, and fill in
 663                                                 // the description itself, if we have one.
 664                                                 if( 'desc' in algorithmTypes[pk] ) {
 665                                                         $('#stemweb_algorithm_desc_text').empty().append( algorithmTypes[pk].desc );
 666                                                         $('#stemweb_algorithm_desc').show();
 667                                                 } else {
 668                                                         $('#stemweb_algorithm_desc').hide();
 669                                                 }
 670                                                 $('#stemweb_runtime_options').empty();
 671                                                 $.each( algorithmTypes[pk].args, function( i, apk ) {
 672                                                         var argInfo = algorithmArgs[apk];
 673                                                         if( argInfo ) {
 674                                                                 // Make the element ID
 675                                                                 var optId = 'stemweb_' + argInfo.key + '_opt';
 676                                                                 // Make the label
 677                                                                 var optLabel = $('<label>').attr( 'for', optId )
 678                                                                         .append( argInfo.name + ": " );
 679                                                                 var optCtrl;
 680                                                                 var argType = argInfo.value;
 681                                                                 if( argType === 'positive_integer' ) {
 682                                                                         // Make it an input field of smallish size.
 683                                                                         optCtrl = $('<input>').attr( 'size', 4 );
 684                                                                 } else if ( argType === 'boolean' ) {
 685                                                                         // Make it a checkbox.
 686                                                                         optCtrl = $('<checkbox>');
 687                                                                 }
 688                                                                 // Add the name and element ID
 689                                                                 optCtrl.attr( 'name', argInfo.key ).attr( 'id', optId );
 690                                                                 // Append the label and the option itself to the form.
 691                                                                 $('#stemweb_runtime_options').append( optLabel )
 692                                                                         .append( optCtrl ).append( $('<br>') );
 693                                                         }
 694                                                 });
 695                                         });
 696                                         $('#stemweb_algorithm').change();
 697                                 }
 698                         });
 699                         // Prime the initial options
 700                 },
 701                 open: function(evt) {
 702                         $('#stemweb_run_status').empty();
 703                         $('#stemweb_tradition').attr('value', selectedTextID );
 704                         if( selectedTextInfo.stemweb_jobid == 0 ) {
 705                                 $('#stemweb_merge_reltypes').empty();
 706                                 $.each( selectedTextInfo.reltypes, function( i, r ) {
 707                                         var relation_opt = $('<option>').attr( 'value', r ).append( r );
 708                                         $('#stemweb_merge_reltypes').append( relation_opt );
 709                                 });
 710                                 $('#stemweb_merge_reltypes').multiselect({
 711                                         header: false,
 712                                         selectedList: 3
 713                                 });
 714                         }
 715                 },
 716         }).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
 717                 $(event.target).parent().find('.ui-button').button("enable");
 718         if( ajaxSettings.url.indexOf( 'stemweb/' ) > -1 ) {
 719                         display_error( jqXHR, $("#stemweb_run_status") );
 720         }
 721         });
 722
 723         // Set up the download dialog
 724         $('#download-dialog').dialog({
 725                 autoOpen: false,
 726                 height: 150,
 727                 width: 300,
 728                 modal: true,
 729                 buttons: {
 730                         Download: function (evt) {
 731                                 var dlurl = _get_url([ "download", $('#download_tradition').val(), $('#download_format').val() ]);
 732                                 window.location = dlurl;
 733                         },
 734                         Done: function() {
 735                                 $('#download-dialog').dialog('close');
 736                         }
 737                 },
 738                 open: function() {
 739                         $('#download_tradition').attr('value', selectedTextID );
 740                 },
 741         }).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
 742                 $(event.target).parent().find('.ui-button').button("enable");
 743         if( ajaxSettings.url.indexOf( 'download' ) > -1
 744                 && ajaxSettings.type == 'POST' ) {
 745                         display_error( jqXHR, $("#download_status") );
 746         }
 747         });
 748
 749         $('#upload-collation-dialog').dialog({
 750                 autoOpen: false,
 751                 height: 360,
 752                 width: 480,
 753                 modal: true,
 754                 buttons: {
 755                   upload: {
 756                     text: 'Upload',
 757                     id: 'upload_button',
 758                     click: function() {
 759                             $('#upload_status').empty();
 760                             $('#upload_button').button("disable");
 761                 upload_new();
 762             }
 763                   },
 764                   pick_file: {
 765                     text: 'Pick File',
 766                     id: 'pick_file_button',
 767                     click: function() {
 768                 $('#new_file').click();
 769             }
 770                   },
 771                   Cancel: function() {
 772                     $('#upload-collation-dialog').dialog('close');
 773                   }
 774                 },
 775                 open: function() {
 776                         // Set the upload button to its correct state based on
 777                         // whether a file is loaded
 778                         file_selected( $('#new_file').get(0) );
 779                         $('#upload_status').empty();
 780                 }
 781         }).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
 782                 // Reset button state
 783                 file_selected( $('#new_file').get(0) );
 784                 // Display error message if applicable
 785         if( ajaxSettings.url.indexOf( 'newtradition' ) > -1
 786                 && ajaxSettings.type == 'POST' ) {
 787                         display_error( jqXHR, $("#upload_status") );
 788         }
 789         });;
 790
 791         $('#stemma_graph').mousedown( function(evt) {
 792         evt.stopPropagation();
 793         $('#stemma_graph').data( 'mousedown_xy', [evt.clientX, evt.clientY] );
 794         $('body').mousemove( function(evt) {
 795             mouse_scale = 1; // for now, was:  mouse_scale = svg_root_element.getScreenCTM().a;
 796             dx = (evt.clientX - $('#stemma_graph').data( 'mousedown_xy' )[0]) / mouse_scale;
 797             dy = (evt.clientY - $('#stemma_graph').data( 'mousedown_xy' )[1]) / mouse_scale;
 798             $('#stemma_graph').data( 'mousedown_xy', [evt.clientX, evt.clientY] );
 799             var svg_root = $('#stemma_graph svg').svg().svg('get').root();
 800             var g = $('g.graph', svg_root).get(0);
 801             current_translate = g.getAttribute( 'transform' ).split(/translate\(/)[1].split(')',1)[0].split(' ');
 802             new_transform = g.getAttribute( 'transform' ).replace( /translate\([^\)]*\)/, 'translate(' + (parseFloat(current_translate[0]) + dx) + ' ' + (parseFloat(current_translate[1]) + dy) + ')' );
 803             g.setAttribute( 'transform', new_transform );
 804             evt.returnValue = false;
 805             evt.preventDefault();
 806             return false;
 807         });
 808         $('body').mouseup( function(evt) {
 809             $('body').unbind('mousemove');
 810             $('body').unbind('mouseup');
 811         });
 812         });
 813
 814         $('#stemma_graph').mousewheel(function (event, delta) {
 815         event.returnValue = false;
 816         event.preventDefault();
 817         if (!delta || delta == null || delta == 0) delta = event.originalEvent.wheelDelta;
 818         if (!delta || delta == null || delta == 0) delta = -1 * event.originalEvent.detail;
 819         if( delta < -9 ) { delta = -9 };
 820         var z = 1 + delta/10;
 821         z = delta > 0 ? 1 : -1;
 822         var svg_root = $('#stemma_graph svg').svg().svg('get').root();
 823         var g = $('g.graph', svg_root).get(0);
 824         if (g && ((z<1 && (g.getScreenCTM().a * start_element_height) > 4.0) || (z>=1 && (g.getScreenCTM().a * start_element_height) < 1000))) {
 825             var scaleLevel = z/10;
 826             current_scale = parseFloat( g.getAttribute( 'transform' ).split(/scale\(/)[1].split(')',1)[0].split(' ')[0] );
 827             new_transform = g.getAttribute( 'transform' ).replace( /scale\([^\)]*\)/, 'scale(' + (current_scale + scaleLevel) + ')' );
 828             g.setAttribute( 'transform', new_transform );
 829         }
 830     });
 831
 832 });