src/editor/modules/documentCanvas/documentCanvas.js

   1 // Module that implements main WYSIWIG edit area
   2
   3 define([
   4 'libs/jquery',
   5 'libs/underscore',
   6 'fnpjs/logging/logging',
   7 './canvas/canvas',
   8 'libs/text!./template.html'], function($, _, logging, canvas3, template) {
   9
  10 'use strict';
  11
  12
  13 var logger = logging.getLogger('documentCanvas');
  14
  15 return function(sandbox) {
  16
  17     var canvasElements = [];
  18
  19     sandbox.getPlugins().forEach(function(plugin) {
  20         canvasElements = canvasElements.concat(plugin.canvasElements || []);
  21     });
  22
  23     var canvas = canvas3.fromXMLDocument(null, canvasElements);
  24     var canvasWrapper = $(template);
  25     var shownAlready = false;
  26     var scrollbarPosition = 0,
  27         actionHandlers = {},
  28         cursorPosition;
  29
  30
  31     canvas.on('selectionChanged', function(selection) {
  32         sandbox.publish('selectionChanged', selection);
  33     });
  34
  35     canvasWrapper.onShow = function() {
  36         if(!shownAlready) {
  37             shownAlready = true;
  38             canvas.setCurrentElement(canvas.doc().getVerticallyFirstTextElement());
  39         } else {
  40             canvas.setCursorPosition(cursorPosition);
  41             this.find('#rng-module-documentCanvas-contentWrapper').scrollTop(scrollbarPosition);
  42         }
  43     };
  44
  45     canvasWrapper.onHide = function() {
  46        scrollbarPosition = this.find('#rng-module-documentCanvas-contentWrapper').scrollTop();
  47        cursorPosition = canvas.getCursor().getPosition();
  48     };
  49
  50     /* public api */
  51     return {
  52         start: function() {
  53             sandbox.getPlugins().forEach(function(plugin) {
  54                 var handlers;
  55                 if(plugin.canvas) {
  56                     handlers = plugin.canvas.actionHandlers;
  57                     if(handlers && !_.isArray(handlers)) {
  58                         handlers = [handlers];
  59                     }
  60                     actionHandlers[plugin.name] = handlers;
  61                 }
  62             });
  63             sandbox.publish('ready');
  64         },
  65         getView: function() {
  66             return canvasWrapper;
  67         },
  68         getCanvas: function() {
  69             return canvas;
  70         },
  71         setDocument: function(wlxmlDocument) {
  72             canvas.loadWlxmlDocument(wlxmlDocument);
  73             canvasWrapper.find('#rng-module-documentCanvas-content').empty().append(canvas.view());
  74         },
  75         highlightElement: function(node) {
  76             canvas.toggleElementHighlight(node, true);
  77         },
  78         dimElement: function(node) {
  79             canvas.toggleElementHighlight(node, false);
  80         },
  81         jumpToElement: function(node) {
  82             canvas.setCurrentElement(node);
  83         },
  84         onAfterActionExecuted: function(action, ret) {
  85             if(ret && ret instanceof canvas.wlxmlDocument.CaretFragment && ret.isValid()) {
  86                 logger.debug('The action returned a valid fragment');
  87                 canvas.setCurrentElement(ret.node, {caretTo: ret.offset});
  88                 return;
  89             }
  90             logger.debug('No valid fragment returned from the action');
  91
  92             (actionHandlers[action.getPluginName()] || []).forEach(function(handler) {
  93                 handler(canvas, action, ret);
  94             });
  95         }
  96     };
  97
  98 };
  99
 100 });