BookStack Code Mirror - bookstack/blob - resources/assets/js/directives.js

   1 "use strict";
   2 const DropZone = require('dropzone');
   3 const markdown = require('marked');
   4
   5 const toggleSwitchTemplate = require('./components/toggle-switch.html');
   6 const imagePickerTemplate = require('./components/image-picker.html');
   7 const dropZoneTemplate = require('./components/drop-zone.html');
   8
   9 module.exports = function (ngApp, events) {
  10
  11     /**
  12      * Toggle Switches
  13      * Has basic on/off functionality.
  14      * Use string values of 'true' & 'false' to dictate the current state.
  15      */
  16     ngApp.directive('toggleSwitch', function () {
  17         return {
  18             restrict: 'A',
  19             template: toggleSwitchTemplate,
  20             scope: true,
  21             link: function (scope, element, attrs) {
  22                 scope.name = attrs.name;
  23                 scope.value = attrs.value;
  24                 scope.isActive = scope.value == true && scope.value != 'false';
  25                 scope.value = (scope.value == true && scope.value != 'false') ? 'true' : 'false';
  26
  27                 scope.switch = function () {
  28                     scope.isActive = !scope.isActive;
  29                     scope.value = scope.isActive ? 'true' : 'false';
  30                 }
  31
  32             }
  33         };
  34     });
  35
  36
  37     /**
  38      * Image Picker
  39      * Is a simple front-end interface that connects to an ImageManager if present.
  40      */
  41     ngApp.directive('imagePicker', ['$http', 'imageManagerService', function ($http, imageManagerService) {
  42         return {
  43             restrict: 'E',
  44             template: imagePickerTemplate,
  45             scope: {
  46                 name: '@',
  47                 resizeHeight: '@',
  48                 resizeWidth: '@',
  49                 resizeCrop: '@',
  50                 showRemove: '=',
  51                 currentImage: '@',
  52                 currentId: '@',
  53                 defaultImage: '@',
  54                 imageClass: '@'
  55             },
  56             link: function (scope, element, attrs) {
  57                 let usingIds = typeof scope.currentId !== 'undefined' || scope.currentId === 'false';
  58                 scope.image = scope.currentImage;
  59                 scope.value = scope.currentImage || '';
  60                 if (usingIds) scope.value = scope.currentId;
  61
  62                 function setImage(imageModel, imageUrl) {
  63                     scope.image = imageUrl;
  64                     scope.value = usingIds ? imageModel.id : imageUrl;
  65                 }
  66
  67                 scope.reset = function () {
  68                     setImage({id: 0}, scope.defaultImage);
  69                 };
  70
  71                 scope.remove = function () {
  72                     scope.image = 'none';
  73                     scope.value = 'none';
  74                 };
  75
  76                 scope.showImageManager = function () {
  77                     imageManagerService.show((image) => {
  78                         scope.updateImageFromModel(image);
  79                     });
  80                 };
  81
  82                 scope.updateImageFromModel = function (model) {
  83                     let isResized = scope.resizeWidth && scope.resizeHeight;
  84
  85                     if (!isResized) {
  86                         scope.$apply(() => {
  87                             setImage(model, model.url);
  88                         });
  89                         return;
  90                     }
  91
  92                     let cropped = scope.resizeCrop ? 'true' : 'false';
  93                     let requestString = '/images/thumb/' + model.id + '/' + scope.resizeWidth + '/' + scope.resizeHeight + '/' + cropped;
  94                     requestString = window.baseUrl(requestString);
  95                     $http.get(requestString).then((response) => {
  96                         setImage(model, response.data.url);
  97                     });
  98                 };
  99
 100             }
 101         };
 102     }]);
 103
 104     /**
 105      * DropZone
 106      * Used for uploading images
 107      */
 108     ngApp.directive('dropZone', [function () {
 109         return {
 110             restrict: 'E',
 111             template: dropZoneTemplate,
 112             scope: {
 113                 uploadUrl: '@',
 114                 eventSuccess: '=',
 115                 eventError: '=',
 116                 uploadedTo: '@'
 117             },
 118             link: function (scope, element, attrs) {
 119                 var dropZone = new DropZone(element[0].querySelector('.dropzone-container'), {
 120                     url: scope.uploadUrl,
 121                     init: function () {
 122                         var dz = this;
 123                         dz.on('sending', function (file, xhr, data) {
 124                             var token = window.document.querySelector('meta[name=token]').getAttribute('content');
 125                             data.append('_token', token);
 126                             var uploadedTo = typeof scope.uploadedTo === 'undefined' ? 0 : scope.uploadedTo;
 127                             data.append('uploaded_to', uploadedTo);
 128                         });
 129                         if (typeof scope.eventSuccess !== 'undefined') dz.on('success', scope.eventSuccess);
 130                         dz.on('success', function (file, data) {
 131                             $(file.previewElement).fadeOut(400, function () {
 132                                 dz.removeFile(file);
 133                             });
 134                         });
 135                         if (typeof scope.eventError !== 'undefined') dz.on('error', scope.eventError);
 136                         dz.on('error', function (file, errorMessage, xhr) {
 137                             console.log(errorMessage);
 138                             console.log(xhr);
 139                             function setMessage(message) {
 140                                 $(file.previewElement).find('[data-dz-errormessage]').text(message);
 141                             }
 142
 143                             if (xhr.status === 413) setMessage('The server does not allow uploads of this size. Please try a smaller file.');
 144                             if (errorMessage.file) setMessage(errorMessage.file[0]);
 145
 146                         });
 147                     }
 148                 });
 149             }
 150         };
 151     }]);
 152
 153     /**
 154      * Dropdown
 155      * Provides some simple logic to create small dropdown menus
 156      */
 157     ngApp.directive('dropdown', [function () {
 158         return {
 159             restrict: 'A',
 160             link: function (scope, element, attrs) {
 161                 const menu = element.find('ul');
 162                 element.find('[dropdown-toggle]').on('click', function () {
 163                     menu.show().addClass('anim menuIn');
 164                     let inputs = menu.find('input');
 165                     let hasInput = inputs.length > 0;
 166                     if (hasInput) {
 167                         inputs.first().focus();
 168                         element.on('keypress', 'input', event => {
 169                             if (event.keyCode === 13) {
 170                                 event.preventDefault();
 171                                 menu.hide();
 172                                 menu.removeClass('anim menuIn');
 173                                 return false;
 174                             }
 175                         });
 176                     }
 177                     element.mouseleave(function () {
 178                         menu.hide();
 179                         menu.removeClass('anim menuIn');
 180                     });
 181                 });
 182             }
 183         };
 184     }]);
 185
 186     /**
 187      * TinyMCE
 188      * An angular wrapper around the tinyMCE editor.
 189      */
 190     ngApp.directive('tinymce', ['$timeout', function ($timeout) {
 191         return {
 192             restrict: 'A',
 193             scope: {
 194                 tinymce: '=',
 195                 mceModel: '=',
 196                 mceChange: '='
 197             },
 198             link: function (scope, element, attrs) {
 199
 200                 function tinyMceSetup(editor) {
 201                     editor.on('ExecCommand change NodeChange ObjectResized', (e) => {
 202                         var content = editor.getContent();
 203                         $timeout(() => {
 204                             scope.mceModel = content;
 205                         });
 206                         scope.mceChange(content);
 207                     });
 208
 209                     editor.on('keydown', (event) => {
 210                         scope.$emit('editor-keydown', event);
 211                     });
 212
 213                     editor.on('init', (e) => {
 214                         scope.mceModel = editor.getContent();
 215                     });
 216
 217                     scope.$on('html-update', (event, value) => {
 218                         editor.setContent(value);
 219                         editor.selection.select(editor.getBody(), true);
 220                         editor.selection.collapse(false);
 221                         scope.mceModel = editor.getContent();
 222                     });
 223                 }
 224
 225                 scope.tinymce.extraSetups.push(tinyMceSetup);
 226
 227                 // Custom tinyMCE plugins
 228                 tinymce.PluginManager.add('customhr', function (editor) {
 229                     editor.addCommand('InsertHorizontalRule', function () {
 230                         var hrElem = document.createElement('hr');
 231                         var cNode = editor.selection.getNode();
 232                         var parentNode = cNode.parentNode;
 233                         parentNode.insertBefore(hrElem, cNode);
 234                     });
 235
 236                     editor.addButton('hr', {
 237                         icon: 'hr',
 238                         tooltip: 'Horizontal line',
 239                         cmd: 'InsertHorizontalRule'
 240                     });
 241
 242                     editor.addMenuItem('hr', {
 243                         icon: 'hr',
 244                         text: 'Horizontal line',
 245                         cmd: 'InsertHorizontalRule',
 246                         context: 'insert'
 247                     });
 248                 });
 249
 250                 tinymce.init(scope.tinymce);
 251             }
 252         }
 253     }]);
 254
 255     /**
 256      * Markdown input
 257      * Handles the logic for just the editor input field.
 258      */
 259     ngApp.directive('markdownInput', ['$timeout', function ($timeout) {
 260         return {
 261             restrict: 'A',
 262             scope: {
 263                 mdModel: '=',
 264                 mdChange: '='
 265             },
 266             link: function (scope, element, attrs) {
 267
 268                 // Set initial model content
 269                 element = element.find('textarea').first();
 270                 let content = element.val();
 271                 scope.mdModel = content;
 272                 scope.mdChange(markdown(content));
 273
 274                 element.on('change input', (event) => {
 275                     content = element.val();
 276                     $timeout(() => {
 277                         scope.mdModel = content;
 278                         scope.mdChange(markdown(content));
 279                     });
 280                 });
 281
 282                 scope.$on('markdown-update', (event, value) => {
 283                     element.val(value);
 284                     scope.mdModel = value;
 285                     scope.mdChange(markdown(value));
 286                 });
 287
 288             }
 289         }
 290     }]);
 291
 292     /**
 293      * Markdown Editor
 294      * Handles all functionality of the markdown editor.
 295      */
 296     ngApp.directive('markdownEditor', ['$timeout', function ($timeout) {
 297         return {
 298             restrict: 'A',
 299             link: function (scope, element, attrs) {
 300
 301                 // Elements
 302                 const input = element.find('[markdown-input] textarea').first();
 303                 const display = element.find('.markdown-display').first();
 304                 const insertImage = element.find('button[data-action="insertImage"]');
 305                 const insertEntityLink = element.find('button[data-action="insertEntityLink"]')
 306
 307                 let currentCaretPos = 0;
 308
 309                 input.blur(event => {
 310                     currentCaretPos = input[0].selectionStart;
 311                 });
 312
 313                 // Scroll sync
 314                 let inputScrollHeight,
 315                     inputHeight,
 316                     displayScrollHeight,
 317                     displayHeight;
 318
 319                 function setScrollHeights() {
 320                     inputScrollHeight = input[0].scrollHeight;
 321                     inputHeight = input.height();
 322                     displayScrollHeight = display[0].scrollHeight;
 323                     displayHeight = display.height();
 324                 }
 325
 326                 setTimeout(() => {
 327                     setScrollHeights();
 328                 }, 200);
 329                 window.addEventListener('resize', setScrollHeights);
 330                 let scrollDebounceTime = 800;
 331                 let lastScroll = 0;
 332                 input.on('scroll', event => {
 333                     let now = Date.now();
 334                     if (now - lastScroll > scrollDebounceTime) {
 335                         setScrollHeights()
 336                     }
 337                     let scrollPercent = (input.scrollTop() / (inputScrollHeight - inputHeight));
 338                     let displayScrollY = (displayScrollHeight - displayHeight) * scrollPercent;
 339                     display.scrollTop(displayScrollY);
 340                     lastScroll = now;
 341                 });
 342
 343                 // Editor key-presses
 344                 input.keydown(event => {
 345                     // Insert image shortcut
 346                     if (event.which === 73 && event.ctrlKey && event.shiftKey) {
 347                         event.preventDefault();
 348                         let caretPos = input[0].selectionStart;
 349                         let currentContent = input.val();
 350                         const mdImageText = "![](http://)";
 351                         input.val(currentContent.substring(0, caretPos) + mdImageText + currentContent.substring(caretPos));
 352                         input.focus();
 353                         input[0].selectionStart = caretPos + ("![](".length);
 354                         input[0].selectionEnd = caretPos + ('![](http://'.length);
 355                         return;
 356                     }
 357
 358                     // Insert entity link shortcut
 359                     if (event.which === 75 && event.ctrlKey && event.shiftKey) {
 360                         showLinkSelector();
 361                         return;
 362                     }
 363
 364                     // Pass key presses to controller via event
 365                     scope.$emit('editor-keydown', event);
 366                 });
 367
 368                 // Insert image from image manager
 369                 insertImage.click(event => {
 370                     window.ImageManager.showExternal(image => {
 371                         let caretPos = currentCaretPos;
 372                         let currentContent = input.val();
 373                         let mdImageText = "![" + image.name + "](" + image.thumbs.display + ")";
 374                         input.val(currentContent.substring(0, caretPos) + mdImageText + currentContent.substring(caretPos));
 375                         input.change();
 376                     });
 377                 });
 378
 379                 function showLinkSelector() {
 380                     window.showEntityLinkSelector((entity) => {
 381                         let selectionStart = currentCaretPos;
 382                         let selectionEnd = input[0].selectionEnd;
 383                         let textSelected = (selectionEnd !== selectionStart);
 384                         let currentContent = input.val();
 385
 386                         if (textSelected) {
 387                             let selectedText = currentContent.substring(selectionStart, selectionEnd);
 388                             let linkText = `[${selectedText}](${entity.link})`;
 389                             input.val(currentContent.substring(0, selectionStart) + linkText + currentContent.substring(selectionEnd));
 390                         } else {
 391                             let linkText = ` [${entity.name}](${entity.link}) `;
 392                             input.val(currentContent.substring(0, selectionStart) + linkText + currentContent.substring(selectionStart))
 393                         }
 394                         input.change();
 395                     });
 396                 }
 397                 insertEntityLink.click(showLinkSelector);
 398
 399                 // Upload and insert image on paste
 400                 function editorPaste(e) {
 401                     e = e.originalEvent;
 402                     if (!e.clipboardData) return
 403                     var items = e.clipboardData.items;
 404                     if (!items) return;
 405                     for (var i = 0; i < items.length; i++) {
 406                         uploadImage(items[i].getAsFile());
 407                     }
 408                 }
 409
 410                 input.on('paste', editorPaste);
 411
 412                 // Handle image drop, Uploads images to BookStack.
 413                 function handleImageDrop(event) {
 414                     event.stopPropagation();
 415                     event.preventDefault();
 416                     let files = event.originalEvent.dataTransfer.files;
 417                     for (let i = 0; i < files.length; i++) {
 418                         uploadImage(files[i]);
 419                     }
 420                 }
 421
 422                 input.on('drop', handleImageDrop);
 423
 424                 // Handle image upload and add image into markdown content
 425                 function uploadImage(file) {
 426                     if (file.type.indexOf('image') !== 0) return;
 427                     var formData = new FormData();
 428                     var ext = 'png';
 429                     var xhr = new XMLHttpRequest();
 430
 431                     if (file.name) {
 432                         var fileNameMatches = file.name.match(/\.(.+)$/);
 433                         if (fileNameMatches) {
 434                             ext = fileNameMatches[1];
 435                         }
 436                     }
 437
 438                     // Insert image into markdown
 439                     let id = "image-" + Math.random().toString(16).slice(2);
 440                     let selectStart = input[0].selectionStart;
 441                     let selectEnd = input[0].selectionEnd;
 442                     let content = input[0].value;
 443                     let selectText = content.substring(selectStart, selectEnd);
 444                     let placeholderImage = window.baseUrl(`/loading.gif#upload${id}`);
 445                     let innerContent = ((selectEnd > selectStart) ? `![${selectText}]` : '![]') + `(${placeholderImage})`;
 446                     input[0].value = content.substring(0, selectStart) +  innerContent + content.substring(selectEnd);
 447
 448                     input.focus();
 449                     input[0].selectionStart = selectStart;
 450                     input[0].selectionEnd = selectStart;
 451
 452                     let remoteFilename = "image-" + Date.now() + "." + ext;
 453                     formData.append('file', file, remoteFilename);
 454                     formData.append('_token', document.querySelector('meta[name="token"]').getAttribute('content'));
 455
 456                     xhr.open('POST', window.baseUrl('/images/gallery/upload'));
 457                     xhr.onload = function () {
 458                         let selectStart = input[0].selectionStart;
 459                         if (xhr.status === 200 || xhr.status === 201) {
 460                             var result = JSON.parse(xhr.responseText);
 461                             input[0].value = input[0].value.replace(placeholderImage, result.thumbs.display);
 462                             input.change();
 463                         } else {
 464                             console.log('An error occurred uploading the image');
 465                             console.log(xhr.responseText);
 466                             input[0].value = input[0].value.replace(innerContent, '');
 467                             input.change();
 468                         }
 469                         input.focus();
 470                         input[0].selectionStart = selectStart;
 471                         input[0].selectionEnd = selectStart;
 472                     };
 473                     xhr.send(formData);
 474                 }
 475
 476             }
 477         }
 478     }]);
 479
 480     /**
 481      * Page Editor Toolbox
 482      * Controls all functionality for the sliding toolbox
 483      * on the page edit view.
 484      */
 485     ngApp.directive('toolbox', [function () {
 486         return {
 487             restrict: 'A',
 488             link: function (scope, elem, attrs) {
 489
 490                 // Get common elements
 491                 const $buttons = elem.find('[tab-button]');
 492                 const $content = elem.find('[tab-content]');
 493                 const $toggle = elem.find('[toolbox-toggle]');
 494
 495                 // Handle toolbox toggle click
 496                 $toggle.click((e) => {
 497                     elem.toggleClass('open');
 498                 });
 499
 500                 // Set an active tab/content by name
 501                 function setActive(tabName, openToolbox) {
 502                     $buttons.removeClass('active');
 503                     $content.hide();
 504                     $buttons.filter(`[tab-button="${tabName}"]`).addClass('active');
 505                     $content.filter(`[tab-content="${tabName}"]`).show();
 506                     if (openToolbox) elem.addClass('open');
 507                 }
 508
 509                 // Set the first tab content active on load
 510                 setActive($content.first().attr('tab-content'), false);
 511
 512                 // Handle tab button click
 513                 $buttons.click(function (e) {
 514                     let name = $(this).attr('tab-button');
 515                     setActive(name, true);
 516                 });
 517             }
 518         }
 519     }]);
 520
 521     /**
 522      * Tag Autosuggestions
 523      * Listens to child inputs and provides autosuggestions depending on field type
 524      * and input. Suggestions provided by server.
 525      */
 526     ngApp.directive('tagAutosuggestions', ['$http', function ($http) {
 527         return {
 528             restrict: 'A',
 529             link: function (scope, elem, attrs) {
 530
 531                 // Local storage for quick caching.
 532                 const localCache = {};
 533
 534                 // Create suggestion element
 535                 const suggestionBox = document.createElement('ul');
 536                 suggestionBox.className = 'suggestion-box';
 537                 suggestionBox.style.position = 'absolute';
 538                 suggestionBox.style.display = 'none';
 539                 const $suggestionBox = $(suggestionBox);
 540
 541                 // General state tracking
 542                 let isShowing = false;
 543                 let currentInput = false;
 544                 let active = 0;
 545
 546                 // Listen to input events on autosuggest fields
 547                 elem.on('input focus', '[autosuggest]', function (event) {
 548                     let $input = $(this);
 549                     let val = $input.val();
 550                     let url = $input.attr('autosuggest');
 551                     let type = $input.attr('autosuggest-type');
 552
 553                     // Add name param to request if for a value
 554                     if (type.toLowerCase() === 'value') {
 555                         let $nameInput = $input.closest('tr').find('[autosuggest-type="name"]').first();
 556                         let nameVal = $nameInput.val();
 557                         if (nameVal !== '') {
 558                             url += '?name=' + encodeURIComponent(nameVal);
 559                         }
 560                     }
 561
 562                     let suggestionPromise = getSuggestions(val.slice(0, 3), url);
 563                     suggestionPromise.then(suggestions => {
 564                         if (val.length === 0) {
 565                             displaySuggestions($input, suggestions.slice(0, 6));
 566                         } else  {
 567                             suggestions = suggestions.filter(item => {
 568                                 return item.toLowerCase().indexOf(val.toLowerCase()) !== -1;
 569                             }).slice(0, 4);
 570                             displaySuggestions($input, suggestions);
 571                         }
 572                     });
 573                 });
 574
 575                 // Hide autosuggestions when input loses focus.
 576                 // Slight delay to allow clicks.
 577                 let lastFocusTime = 0;
 578                 elem.on('blur', '[autosuggest]', function (event) {
 579                     let startTime = Date.now();
 580                     setTimeout(() => {
 581                         if (lastFocusTime < startTime) {
 582                             $suggestionBox.hide();
 583                             isShowing = false;
 584                         }
 585                     }, 200)
 586                 });
 587                 elem.on('focus', '[autosuggest]', function (event) {
 588                     lastFocusTime = Date.now();
 589                 });
 590
 591                 elem.on('keydown', '[autosuggest]', function (event) {
 592                     if (!isShowing) return;
 593
 594                     let suggestionElems = suggestionBox.childNodes;
 595                     let suggestCount = suggestionElems.length;
 596
 597                     // Down arrow
 598                     if (event.keyCode === 40) {
 599                         let newActive = (active === suggestCount - 1) ? 0 : active + 1;
 600                         changeActiveTo(newActive, suggestionElems);
 601                     }
 602                     // Up arrow
 603                     else if (event.keyCode === 38) {
 604                         let newActive = (active === 0) ? suggestCount - 1 : active - 1;
 605                         changeActiveTo(newActive, suggestionElems);
 606                     }
 607                     // Enter or tab key
 608                     else if ((event.keyCode === 13 || event.keyCode === 9) && !event.shiftKey) {
 609                         let text = suggestionElems[active].textContent;
 610                         currentInput[0].value = text;
 611                         currentInput.focus();
 612                         $suggestionBox.hide();
 613                         isShowing = false;
 614                         if (event.keyCode === 13) {
 615                             event.preventDefault();
 616                             return false;
 617                         }
 618                     }
 619                 });
 620
 621                 // Change the active suggestion to the given index
 622                 function changeActiveTo(index, suggestionElems) {
 623                     suggestionElems[active].className = '';
 624                     active = index;
 625                     suggestionElems[active].className = 'active';
 626                 }
 627
 628                 // Display suggestions on a field
 629                 let prevSuggestions = [];
 630
 631                 function displaySuggestions($input, suggestions) {
 632
 633                     // Hide if no suggestions
 634                     if (suggestions.length === 0) {
 635                         $suggestionBox.hide();
 636                         isShowing = false;
 637                         prevSuggestions = suggestions;
 638                         return;
 639                     }
 640
 641                     // Otherwise show and attach to input
 642                     if (!isShowing) {
 643                         $suggestionBox.show();
 644                         isShowing = true;
 645                     }
 646                     if ($input !== currentInput) {
 647                         $suggestionBox.detach();
 648                         $input.after($suggestionBox);
 649                         currentInput = $input;
 650                     }
 651
 652                     // Return if no change
 653                     if (prevSuggestions.join() === suggestions.join()) {
 654                         prevSuggestions = suggestions;
 655                         return;
 656                     }
 657
 658                     // Build suggestions
 659                     $suggestionBox[0].innerHTML = '';
 660                     for (let i = 0; i < suggestions.length; i++) {
 661                         var suggestion = document.createElement('li');
 662                         suggestion.textContent = suggestions[i];
 663                         suggestion.onclick = suggestionClick;
 664                         if (i === 0) {
 665                             suggestion.className = 'active'
 666                             active = 0;
 667                         }
 668                         ;
 669                         $suggestionBox[0].appendChild(suggestion);
 670                     }
 671
 672                     prevSuggestions = suggestions;
 673                 }
 674
 675                 // Suggestion click event
 676                 function suggestionClick(event) {
 677                     let text = this.textContent;
 678                     currentInput[0].value = text;
 679                     currentInput.focus();
 680                     $suggestionBox.hide();
 681                     isShowing = false;
 682                 };
 683
 684                 // Get suggestions & cache
 685                 function getSuggestions(input, url) {
 686                     let hasQuery = url.indexOf('?') !== -1;
 687                     let searchUrl = url + (hasQuery ? '&' : '?') + 'search=' + encodeURIComponent(input);
 688
 689                     // Get from local cache if exists
 690                     if (typeof localCache[searchUrl] !== 'undefined') {
 691                         return new Promise((resolve, reject) => {
 692                             resolve(localCache[searchUrl]);
 693                         });
 694                     }
 695
 696                     return $http.get(searchUrl).then(response => {
 697                         localCache[searchUrl] = response.data;
 698                         return response.data;
 699                     });
 700                 }
 701
 702             }
 703         }
 704     }]);
 705
 706     ngApp.directive('entityLinkSelector', [function($http) {
 707         return {
 708             restict: 'A',
 709             link: function(scope, element, attrs) {
 710
 711                 const selectButton = element.find('.entity-link-selector-confirm');
 712                 let callback = false;
 713                 let entitySelection = null;
 714
 715                 // Handle entity selection change, Stores the selected entity locally
 716                 function entitySelectionChange(entity) {
 717                     entitySelection = entity;
 718                     if (entity === null) {
 719                         selectButton.attr('disabled', 'true');
 720                     } else {
 721                         selectButton.removeAttr('disabled');
 722                     }
 723                 }
 724                 events.listen('entity-select-change', entitySelectionChange);
 725
 726                 // Handle selection confirm button click
 727                 selectButton.click(event => {
 728                     hide();
 729                     if (entitySelection !== null) callback(entitySelection);
 730                 });
 731
 732                 // Show selector interface
 733                 function show() {
 734                     element.fadeIn(240);
 735                 }
 736
 737                 // Hide selector interface
 738                 function hide() {
 739                     element.fadeOut(240);
 740                 }
 741
 742                 // Listen to confirmation of entity selections (doubleclick)
 743                 events.listen('entity-select-confirm', entity => {
 744                     hide();
 745                     callback(entity);
 746                 });
 747
 748                 // Show entity selector, Accessible globally, and store the callback
 749                 window.showEntityLinkSelector = function(passedCallback) {
 750                     show();
 751                     callback = passedCallback;
 752                 };
 753
 754             }
 755         };
 756     }]);
 757
 758
 759     ngApp.directive('entitySelector', ['$http', '$sce', function ($http, $sce) {
 760         return {
 761             restrict: 'A',
 762             scope: true,
 763             link: function (scope, element, attrs) {
 764                 scope.loading = true;
 765                 scope.entityResults = false;
 766                 scope.search = '';
 767
 768                 // Add input for forms
 769                 const input = element.find('[entity-selector-input]').first();
 770
 771                 // Detect double click events
 772                 var lastClick = 0;
 773                 function isDoubleClick() {
 774                     let now = Date.now();
 775                     let answer = now - lastClick < 300;
 776                     lastClick = now;
 777                     return answer;
 778                 }
 779
 780                 // Listen to entity item clicks
 781                 element.on('click', '.entity-list a', function(event) {
 782                     event.preventDefault();
 783                     event.stopPropagation();
 784                     let item = $(this).closest('[data-entity-type]');
 785                     itemSelect(item, isDoubleClick());
 786                 });
 787                 element.on('click', '[data-entity-type]', function(event) {
 788                     itemSelect($(this), isDoubleClick());
 789                 });
 790
 791                 // Select entity action
 792                 function itemSelect(item, doubleClick) {
 793                     let entityType = item.attr('data-entity-type');
 794                     let entityId = item.attr('data-entity-id');
 795                     let isSelected = !item.hasClass('selected') || doubleClick;
 796                     element.find('.selected').removeClass('selected').removeClass('primary-background');
 797                     if (isSelected) item.addClass('selected').addClass('primary-background');
 798                     let newVal = isSelected ? `${entityType}:${entityId}` : '';
 799                     input.val(newVal);
 800
 801                     if (!isSelected) {
 802                         events.emit('entity-select-change', null);
 803                     }
 804
 805                     if (!doubleClick && !isSelected) return;
 806
 807                     let link = item.find('.entity-list-item-link').attr('href');
 808                     let name = item.find('.entity-list-item-name').text();
 809
 810                     if (doubleClick) {
 811                         events.emit('entity-select-confirm', {
 812                             id: Number(entityId),
 813                             name: name,
 814                             link: link
 815                         });
 816                     }
 817
 818                     if (isSelected) {
 819                         events.emit('entity-select-change', {
 820                             id: Number(entityId),
 821                             name: name,
 822                             link: link
 823                         });
 824                     }
 825                 }
 826
 827                 // Get search url with correct types
 828                 function getSearchUrl() {
 829                     let types = (attrs.entityTypes) ? encodeURIComponent(attrs.entityTypes) : encodeURIComponent('page,book,chapter');
 830                     return window.baseUrl(`/ajax/search/entities?types=${types}`);
 831                 }
 832
 833                 // Get initial contents
 834                 $http.get(getSearchUrl()).then(resp => {
 835                     scope.entityResults = $sce.trustAsHtml(resp.data);
 836                     scope.loading = false;
 837                 });
 838
 839                 // Search when typing
 840                 scope.searchEntities = function() {
 841                     scope.loading = true;
 842                     input.val('');
 843                     let url = getSearchUrl() + '&term=' + encodeURIComponent(scope.search);
 844                     $http.get(url).then(resp => {
 845                         scope.entityResults = $sce.trustAsHtml(resp.data);
 846                         scope.loading = false;
 847                     });
 848                 };
 849             }
 850         };
 851     }]);
 852 };
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