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