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