src/editor/plugins/core/core.js

   1 define(function(require) {
   2
   3 'use strict';
   4 /* globals gettext */
   5
   6 var _ = require('libs/underscore'),
   7     templates = require('plugins/core/templates'),
   8     footnote = require('plugins/core/footnote'),
   9     switchTo = require('plugins/core/switch'),
  10     lists = require('plugins/core/lists'),
  11     plugin = {name: 'core', actions: [], canvas: {}, documentExtension: {textNode: {}, documentNode: {}}},
  12     Dialog = require('views/dialog/dialog'),
  13     canvasElements = require('plugins/core/canvasElements'),
  14     metadataEditor = require('plugins/core/metadataEditor/metadataEditor'),
  15     edumed = require('plugins/core/edumed/edumed'),
  16     attachments = require('views/attachments/attachments');
  17
  18
  19
  20
  21 var exerciseFix = function(newNodes) {
  22     var list, exercise, max, addedItem, answerValues;
  23     if(newNodes.created.is('item')) {
  24         list = newNodes.created.parent();
  25         exercise = list.parent();
  26         if(exercise && exercise.is('exercise')) {
  27             if(exercise.is('exercise.order')) {
  28                 answerValues = exercise.object.getItems()
  29                             .map(function(item) {
  30                                 if(!addedItem && item.node.sameNode(newNodes.created)) {
  31                                     addedItem = item;
  32                                 }
  33                                 return item.getAnswer();
  34                             });
  35                 max = Math.max.apply(Math.max, answerValues);
  36                 addedItem.setAnswer(max + 1);
  37             }
  38         }
  39     }
  40 };
  41
  42 plugin.documentExtension.textNode.transformations = {
  43     breakContent: {
  44         impl: function(args) {
  45             var node = this,
  46                 isSpan = node.parent().getTagName() === 'span',
  47                 parentDescribingNodes = [],
  48                 newNodes, emptyText;
  49             newNodes = node.split({offset: args.offset});
  50             newNodes.second.contents()
  51                 .filter(function(child) {
  52                     return child.object.describesParent;
  53                 })
  54                 .forEach(function(child) {
  55                     //child.detach();
  56                     parentDescribingNodes.push(child);
  57                     child.detach();
  58                 });
  59             [newNodes.first, newNodes.second].some(function(newNode) {
  60                 if(!(newNode.contents().length)) {
  61                     emptyText = newNode.append({text: ''});
  62                     return true; // break
  63                 }
  64             });
  65
  66             /* <hack>
  67             /*
  68                 This makes sure that adding a new item to the list in some of the edumed exercises
  69                 sets an answer attribute that makes sense (and not just copies it which would create
  70                 a duplicate value).
  71
  72                 This won't be neccessary when/if we introduce canvas element own key event handlers.
  73
  74                 Alternatively, WLXML elements could implement their own item split methods that we
  75                 would delegate to.
  76             */
  77                 exerciseFix(newNodes);
  78             /* </hack> */
  79
  80             parentDescribingNodes.forEach(function(node) {
  81                 newNodes.first.append(node);
  82             });
  83
  84             var parent, newNode;
  85
  86             var copyNode = function(n) {
  87                 var attrs = {};
  88                 n.getAttrs().forEach(function(attr) {
  89                     attrs[attr.name] = attr.value;
  90                 });
  91
  92                 return node.document.createDocumentNode({
  93                     tagName: n.getTagName(),
  94                     attrs: attrs
  95                 });
  96             };
  97
  98             var move = function(node, to) {
  99                 var copy;
 100                 if(!node.containsNode(newNodes.second)) {
 101                     to.append(node);
 102                     return false;
 103                 } else {
 104                     if(!node.sameNode(newNodes.second)) {
 105                         copy = to.append(copyNode(node));
 106                         node.contents().some(function(n) {
 107                             return move(n, copy);
 108                         });
 109                     }
 110                     return true;
 111                 }
 112             };
 113
 114             if(isSpan) {
 115                 newNodes.first.parents().some(function(p) {
 116                     if(p.getTagName() !== 'span') {
 117                         parent = p;
 118                         return true;
 119                     }
 120                 });
 121                 newNode = parent.before({tagName: parent.getTagName(), attrs: {'class': parent.getClass()}});
 122                 parent.contents().some(function(n) {
 123                     return move(n, newNode);
 124                 });
 125                 if(newNodes.second.contents()[0].getText().length === 0) {
 126                     var textNode = newNodes.second.contents()[0];
 127                     newNodes.second.detach();
 128                     newNodes.second = parent;
 129                     emptyText = newNodes.second.append(textNode);
 130                 }
 131             }
 132
 133             var newNodeText = newNodes.second.contents()[0].getText();
 134             if(newNodes.second.is({tagName: 'header'}) && newNodeText === '') {
 135                 newNodes.second = newNodes.second.setTag('div');
 136                 newNodes.second.setClass('p');
 137             }
 138
 139             return _.extend(newNodes, {emptyText: emptyText});
 140         }
 141     },
 142     mergeContentUp: function() {
 143         /* globals Node */
 144         var myPrev = this,
 145             base = this,
 146             ret;
 147
 148         if(myPrev.nodeType === Node.TEXT_NODE) {
 149             if(myPrev.getIndex() > 0) {
 150                 return;
 151             }
 152             myPrev = base = myPrev.parent();
 153         }
 154
 155         myPrev = myPrev && myPrev.prev();
 156
 157         if(myPrev && myPrev.nodeType === Node.ELEMENT_NODE)  {
 158             var ptr = this,
 159                 next;
 160             while(ptr) {
 161                 next = ptr.next();
 162                 if(!ret) {
 163                     ret = myPrev.append(ptr);
 164                 } else {
 165                     myPrev.append(ptr);
 166                 }
 167
 168                 ptr = next;
 169             }
 170             if(base !== this) {
 171                 base.detach();
 172             }
 173             return {node: ret, offset: ret.sameNode(this) ? null : ret.getText().length - this.getText().length};
 174         }
 175     }
 176 };
 177
 178 plugin.documentExtension.documentNode.transformations = {
 179     moveUp: function() {
 180         var toMerge = this,
 181             prev = toMerge.prev();
 182
 183         var merge = function(from, to) {
 184             var toret;
 185             from.contents().forEach(function(node, idx) {
 186                 var len, ret;
 187                 if(idx === 0 && node.nodeType === Node.TEXT_NODE) {
 188                     len = node.getText().length;
 189                 }
 190                 ret = to.append(node);
 191
 192                 if(idx === 0 && ret.nodeType === Node.TEXT_NODE) {
 193                     toret = {
 194                         node: ret,
 195                         offset: ret.getText().length - len
 196                     };
 197                 } else if(!toret) {
 198                     toret = {
 199                         node: ret.getFirstTextNode(),
 200                         offset: 0
 201                     };
 202                 }
 203             });
 204             from.detach();
 205             return toret;
 206         };
 207
 208         var strategies = [
 209             {
 210                 applies: function() {
 211                     return toMerge.nodeType === Node.TEXT_NODE && prev.is({tagName: 'span'});
 212                 },
 213                 run: function() {
 214                     var textNode = prev.getLastTextNode(),
 215                         txt, prevText, prevTextLen;
 216                     if(textNode) {
 217                         txt = textNode.getText();
 218                         if(txt.length > 1) {
 219                             textNode.setText(txt.substr(0, txt.length-1));
 220                             return {node: toMerge, offset: 0};
 221                         } else {
 222                             if((prevText = prev.prev()) && prevText.nodeType === Node.TEXT_NODE) {
 223                                 prevTextLen = prevText.getText().length;
 224                             }
 225                             prev.detach();
 226                             return {
 227                                 node: prevText ? prevText : toMerge,
 228                                 offset : prevText ? prevTextLen : 0
 229                             };
 230                         }
 231                     }
 232                 }
 233             },
 234             {
 235                 applies: function() {
 236                     return toMerge.is({tagName: 'div', 'klass': 'p'}) || (toMerge.is({tagName: 'div'}) && toMerge.getClass() === '');
 237                 },
 238                 run: function() {
 239                     if (!prev)
 240                         return;
 241                     if(prev.is('p') || prev.is({tagName: 'header'})) {
 242                         return merge(toMerge, prev);
 243                     }
 244                     if(prev.is('list')) {
 245                         var items = prev.contents().filter(function(n) { return n.is('item');});
 246                         return merge(toMerge, items[items.length-1]);
 247                     }
 248                 }
 249             },
 250             {
 251                 applies: function() {
 252                     return toMerge.is({tagName: 'span'});
 253                 },
 254                 run: function() {
 255                     /* globals Node */
 256                     var toret = {node: toMerge.contents()[0] , offset: 0},
 257                         txt, txtNode, parent;
 258                     if(!prev) {
 259                         toMerge.parents().some(function(p) {
 260                             if(p.is({tagName: 'span'})) {
 261                                 parent = prev = p;
 262                             } else {
 263                                 if(!parent) {
 264                                     parent = p;
 265                                 }
 266                                 prev = prev && prev.prev();
 267                                 return true;
 268                             }
 269                         });
 270                     }
 271                     if(!prev) {
 272                         return parent.moveUp();
 273                     }
 274                     else if(prev.nodeType === Node.TEXT_NODE && (txt = prev.getText())) {
 275                         prev.setText(txt.substr(0, txt.length-1));
 276                         return toret;
 277                     } else if(prev.is({tagName: 'span'})) {
 278                         if((txtNode = prev.getLastTextNode())) {
 279                             txt = txtNode.getText();
 280                             if(txt.length > 1) {
 281                                 txtNode.setText(txt.substr(0, txt.length-1));
 282                             } else {
 283                                 if(txtNode.parent().contents().length === 1) {
 284                                     txtNode.parent().detach();
 285                                 } else {
 286                                     txtNode.detach();
 287                                 }
 288
 289                             }
 290                             return toret;
 291                         }
 292                     }
 293
 294                 }
 295             },
 296             {
 297                 applies: function() {
 298                     return toMerge.is({tagName: 'header'});
 299                 },
 300                 run: function() {
 301                     if(prev && (prev.is('p') || prev.is({tagName: 'header'}))) {
 302                         return merge(toMerge, prev);
 303                     }
 304                 }
 305             },
 306             {
 307                 applies: function() {
 308                     return toMerge.is('item');
 309                 },
 310                 run: function() {
 311                     var list;
 312                     if(prev && prev.is('item')) {
 313                         return merge(toMerge, prev);
 314                     } else if(!prev && (list = toMerge.parent()) && list.is('list')) {
 315                         list.before(toMerge);
 316                         toMerge.setClass('p');
 317                         if(!list.contents().length) {
 318                             list.detach();
 319                         }
 320                         return {node: toMerge.contents()[0], offset:0};
 321                     }
 322                 }
 323             }
 324         ];
 325
 326         var toret;
 327         strategies.some(function(strategy) {
 328             if(strategy.applies()) {
 329                 toret = strategy.run();
 330                 return true;
 331             }
 332         });
 333         return toret;
 334     },
 335     insertNewNode: function () {
 336         var node = this;
 337         var newElement = this.document.createDocumentNode({tagName: 'div', attrs: {class: 'p'}});
 338         node.after(newElement);
 339         newElement.append({text: ''});
 340         return newElement;
 341     }
 342 };
 343
 344 var undoRedoAction = function(dir) {
 345     return {
 346         name: dir,
 347         params: {
 348             document: {type: 'context', name: 'document'},
 349         },
 350         stateDefaults: {
 351             label: dir === 'undo' ? '<-' : '->',
 352             icon: 'share-alt',
 353             iconStyle: dir === 'undo' ? '-webkit-transform: scale(-1,1); transform: scale(-1, 1)' : '',
 354             execute: function(callback, params) {
 355                 var metadata = _.last(params.document[dir+'Stack']).metadata,
 356                     fragment = metadata && metadata.fragment;
 357                 params.document[dir]();
 358                 if(fragment) {
 359                     if(!fragment.isValid()) {
 360                         fragment.restoreFromPaths();
 361                     }
 362                     if(fragment.isValid()) {
 363                         callback(fragment);
 364                     }
 365                 }
 366                 callback();
 367             },
 368         },
 369         getState: function(params) {
 370             var allowed = params.document && !!(params.document[dir+'Stack'].length),
 371                 desc = dir === 'undo' ? gettext('Undo') : gettext('Redo'),
 372                 descEmpty = dir === 'undo' ? gettext('There is nothing to undo') : gettext('There is nothing to redo');
 373             if(allowed) {
 374                 var metadata = _.last(params.document[dir+'Stack']).metadata;
 375                 if(metadata) {
 376                     desc += ': ' + (metadata.description || gettext('unknown operation'));
 377                 }
 378             }
 379             return {
 380                 allowed: allowed,
 381                 description: allowed ? desc : descEmpty
 382             };
 383         }
 384     };
 385 };
 386
 387 var pad = function(number) {
 388     if(number < 10) {
 389         number = '0' + number;
 390     }
 391     return number;
 392 };
 393
 394 var commentAction = {
 395     name: 'comment',
 396     params: {
 397         fragment: {type: 'context', name: 'fragment'}
 398     },
 399     stateDefaults: {
 400         icon: 'comment',
 401         execute: function(callback, params, editor) {
 402             /* globals Node */
 403             var node = params.fragment.node,
 404                 action = this;
 405             if(node.nodeType === Node.TEXT_NODE) {
 406                 node = node.parent();
 407             }
 408             node.document.transaction(function() {
 409                 var comment =  node.after({tagName: 'aside', attrs: {'class': 'comment'}});
 410                 comment.append({text:''});
 411                 var user = editor.getUser(), creator;
 412                 if(user) {
 413                     creator = user.name;
 414                     if(user.email) {
 415                         creator += ' (' + user.email + ')';
 416                     }
 417                 } else {
 418                     creator = 'anonymous';
 419                 }
 420
 421                 var currentDate = new Date(),
 422                     dt = pad(currentDate.getDate()) + '-' +
 423                                 pad((currentDate.getMonth() + 1))  + '-' +
 424                                 pad(currentDate.getFullYear()) + ' ' +
 425                                 pad(currentDate.getHours()) + ':' +
 426                                 pad(currentDate.getMinutes()) + ':' +
 427                                 pad(currentDate.getSeconds());
 428
 429                 var metadata = comment.getMetadata();
 430                 metadata.add({key: 'creator', value: creator});
 431                 metadata.add({key: 'date', value: dt});
 432             }, {
 433                 metadata: {
 434                     description: action.getState().description
 435                 },
 436                 success: callback
 437             });
 438         },
 439     },
 440     getState: function(params) {
 441         var state = {
 442             allowed: params.fragment && params.fragment.isValid() &&
 443                         params.fragment instanceof params.fragment.NodeFragment && !params.fragment.node.isRoot()
 444         };
 445         if(state.allowed) {
 446             state.description = gettext('Insert comment');
 447         }
 448         return state;
 449     }
 450 };
 451
 452
 453 var createWrapTextAction = function(createParams) {
 454     return {
 455         name: createParams.name,
 456         params: {
 457             fragment: {type: 'context', name: 'fragment'},
 458         },
 459         getState: function(params) {
 460             var state = {
 461                     label: this.config.label
 462                 },
 463                 parent;
 464
 465             if(!params.fragment || !params.fragment.isValid()) {
 466                 return _.extend(state, {allowed: false});
 467             }
 468
 469             if(params.fragment instanceof params.fragment.CaretFragment && params.fragment.node.isInside(createParams.klass)) {
 470                 return _.extend(state, {
 471                     allowed: true,
 472                     toggled: true,
 473                     description: createParams.unwrapDescription,
 474                     execute: function(callback, params) {
 475                         var node = params.fragment.node,
 476                             doc = node.document,
 477                             toRemove = node.getParent(createParams.klass),
 478                             prefLen = 0;
 479
 480                         if(node.sameNode(toRemove.contents()[0]) && toRemove.isPrecededByTextNode()) {
 481                             prefLen = toRemove.prev().getText().length;
 482                         }
 483
 484                         doc.transaction(function() {
 485                             var ret = toRemove.unwrapContent(),
 486                                 newFragment = params.fragment;
 487                             if(!newFragment.isValid()) {
 488                                 newFragment =  doc.createFragment(doc.CaretFragment, {
 489                                     node: ret.element1,
 490                                     offset: prefLen + params.fragment.offset
 491                                 });
 492                             }
 493                             return newFragment;
 494                         }, {
 495                             metadata: {
 496                                 description: createParams.unwrapDescription,
 497                                 fragment: params.fragment
 498                             },
 499                             success: callback
 500                         });
 501                     }
 502                 });
 503             }
 504
 505             if(params.fragment instanceof params.fragment.TextRangeFragment && params.fragment.hasSiblingBoundaries()) {
 506                 parent = params.fragment.startNode.parent();
 507                 if(parent && parent.is(createParams.klass) || parent.isInside(createParams.klass)) {
 508                     return _.extend(state, {allowed: false});
 509                 }
 510
 511                 return _.extend(state, {
 512                     allowed: true,
 513                     description: createParams.wrapDescription,
 514                     execute: function(callback, params) {
 515                         params.fragment.document.transaction(function() {
 516                             var parent = params.fragment.startNode.parent(),
 517                                 doc = params.fragment.document,
 518                                 wrapper, lastTextNode;
 519
 520                             wrapper = parent.wrapText({
 521                                 _with: {tagName: 'span', attrs: {'class': createParams.klass}},
 522                                 offsetStart: params.fragment.startOffset,
 523                                 offsetEnd: params.fragment.endOffset,
 524                                 textNodeIdx: [params.fragment.startNode.getIndex(), params.fragment.endNode.getIndex()]
 525                             });
 526
 527                             lastTextNode = wrapper.getLastTextNode();
 528                             if(lastTextNode) {
 529                                 return doc.createFragment(doc.CaretFragment, {node: lastTextNode, offset: lastTextNode.getText().length});
 530                             }
 531                         }, {
 532                             metadata: {
 533                                 description: createParams.wrapDescription,
 534                                 fragment: params.fragment
 535                             },
 536                             success: callback
 537                         });
 538                     }
 539                 });
 540             }
 541             return _.extend(state, {allowed: false});
 542         }
 543     };
 544 };
 545
 546
 547
 548 var createLinkFromSelection = function(callback, params) {
 549     var doc = params.fragment.document,
 550         dialog = Dialog.create({
 551             title: gettext('Create link'),
 552             executeButtonText: gettext('Apply'),
 553             cancelButtonText: gettext('Cancel'),
 554             fields: [
 555                 {label: gettext('Link'), name: 'href', type: 'input',
 556                 prePasteHandler: function(text) {
 557                                     return params.fragment.document.getLinkForUrl(text);
 558                                 }.bind(this),
 559                 description: '<a href="#-" class="attachment-library">' + gettext('attachment library') + '</a>'
 560                 }
 561             ]
 562         }),
 563         action = this;
 564
 565     dialog.on('execute', function(event) {
 566         doc.transaction(function() {
 567             var span =  action.params.fragment.startNode.parent().wrapText({
 568                 _with: {tagName: 'span', attrs: {'class': 'link', href: event.formData.href }},
 569                 offsetStart: params.fragment.startOffset,
 570                 offsetEnd: params.fragment.endOffset,
 571                 textNodeIdx: [params.fragment.startNode.getIndex(), params.fragment.endNode.getIndex()]
 572             }),
 573                 doc = params.fragment.document;
 574             event.success();
 575             return doc.createFragment(doc.CaretFragment, {node: span.contents()[0], offset:0});
 576         }, {
 577             metadata: {
 578                 description: action.getState().description,
 579                 fragment: params.fragment
 580             },
 581             success: callback
 582         });
 583     });
 584     dialog.show();
 585     $(".attachment-library", dialog.$el).on('click', function() {
 586         attachments.select(function(v) {$("input", dialog.$el).val(v);});
 587     });
 588 };
 589
 590 var editLink = function(callback, params) {
 591     var doc = params.fragment.document,
 592         link = params.fragment.node.getParent('link'),
 593         dialog = Dialog.create({
 594             title: gettext('Edit link'),
 595             executeButtonText: gettext('Apply'),
 596             cancelButtonText: gettext('Cancel'),
 597             fields: [
 598                 {label: gettext('Link'), name: 'href', type: 'input', initialValue: link.getAttr('href')}
 599             ]
 600         }),
 601         action = this;
 602
 603     dialog.on('execute', function(event) {
 604         doc.transaction(function() {
 605             link.setAttr('href', event.formData.href);
 606             event.success();
 607             return params.fragment;
 608         }, {
 609             metadata: {
 610                 description: action.getState().description,
 611                 fragment: params.fragment
 612             },
 613             success: callback
 614         });
 615     });
 616     dialog.show();
 617 };
 618
 619 var linkAction = {
 620     name: 'link',
 621     params: {
 622         fragment: {type: 'context', name: 'fragment'}
 623     },
 624     stateDefaults: {
 625         label: gettext('link')
 626     },
 627     getState: function(params) {
 628         if(!params.fragment || !params.fragment.isValid()) {
 629             return {allowed: false};
 630         }
 631
 632         if(params.fragment instanceof params.fragment.TextRangeFragment) {
 633             if(!params.fragment.hasSiblingBoundaries() || params.fragment.startNode.parent().is('link')) {
 634                 return {allowed: false};
 635             }
 636             return {
 637                 allowed: true,
 638                 description: gettext('Create link from selection'),
 639                 execute: createLinkFromSelection
 640             };
 641         }
 642
 643         if(params.fragment instanceof params.fragment.CaretFragment) {
 644             if(params.fragment.node.isInside('link')) {
 645                 return {
 646                     allowed: true,
 647                     toggled: true,
 648                     description: gettext('Edit link'),
 649                     execute: editLink
 650                 };
 651             }
 652         }
 653         return {allowed: false};
 654     }
 655 };
 656
 657
 658 var metadataParams = {};
 659
 660 plugin.actions = [
 661     undoRedoAction('undo'),
 662     undoRedoAction('redo'),
 663     commentAction,
 664     createWrapTextAction({name: 'emphasis', klass: 'emp', wrapDescription: gettext('Mark as emphasized'), unwrapDescription: gettext('Remove emphasis')}),
 665     createWrapTextAction({name: 'cite', klass: 'cite', wrapDescription: gettext('Mark as citation'), unwrapDescription: gettext('Remove citation')}),
 666     linkAction,
 667     metadataEditor.action(metadataParams)
 668 ].concat(plugin.actions, templates.actions, footnote.actions, switchTo.actions, lists.actions, edumed.actions);
 669
 670
 671 plugin.config = function(config) {
 672     // templates.actions[0].config(config.templates);
 673     templates.actions[0].params.template.options = config.templates;
 674     metadataParams.config = (config.metadata || []).sort(function(configRow1, configRow2) {
 675         if(configRow1.key < configRow2.key) {
 676             return -1;
 677         }
 678         if(configRow1.key > configRow2.key) {
 679             return 1;
 680         }
 681         return 0;
 682     });
 683 };
 684
 685 plugin.canvasElements = canvasElements.concat(edumed.canvasElements);
 686
 687 return plugin;
 688
 689 });