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