modules/documentCanvas/canvasManager.js

   1 define([
   2 'libs/jquery-1.9.1.min',
   3 './canvasNode'
   4 ], function($, canvasNode) {
   5
   6 'use strict';
   7
   8 var getCursorPosition = function() {
   9     var selection = window.getSelection();
  10     var anchorNode = $(selection.anchorNode);
  11     var parent = anchorNode.parent();
  12     return {
  13         textNode: anchorNode,
  14         textNodeOffset: selection.anchorOffset,
  15         textNodeIndex: parent.contents().index(anchorNode),
  16         parentNode: parent,
  17         focusNode: $(selection.focusNode).parent(),
  18         isAtEnd: selection.anchorOffset === anchorNode.text().length
  19     };
  20 };
  21
  22 var Manager = function(canvas, sandbox) {
  23     this.canvas = canvas;
  24     this.sandbox = sandbox;
  25     this.shownAlready = false;
  26     this.gridToggled = false;
  27     this.scrollbarPosition = 0;
  28     this.currentNode = null;
  29     var manager = this;
  30
  31     canvas.dom.find('#rng-module-documentCanvas-content').on('keyup', function() {
  32         manager.sandbox.publish('contentChanged');
  33     });
  34
  35     canvas.dom.on('mouseover', '[wlxml-tag]', function(e) {
  36         e.stopPropagation();
  37         manager.sandbox.publish('nodeHovered', canvasNode.create($(e.target)));
  38     });
  39     canvas.dom.on('mouseout', '[wlxml-tag]', function(e) {
  40         e.stopPropagation();
  41         manager.sandbox.publish('nodeBlured', canvasNode.create($(e.target)));
  42     });
  43     canvas.dom.on('click', '[wlxml-tag]', function(e) {
  44         e.stopPropagation();
  45         console.log('clicked node type: '+e.target.nodeType);
  46         manager.selectNode(canvasNode.create($(e.target)));
  47     });
  48
  49     canvas.dom.on('keyup', '#rng-module-documentCanvas-contentWrapper', function(e) {
  50         var anchor = $(window.getSelection().anchorNode);
  51
  52         if(anchor[0].nodeType === Node.TEXT_NODE)
  53             anchor = anchor.parent();
  54         if(!anchor.is('[wlxml-tag]'))
  55             return;
  56         manager.selectNode(canvasNode.create(anchor));
  57     });
  58
  59     canvas.dom.on('keydown', '#rng-module-documentCanvas-contentWrapper', function(e) {
  60         if(e.which === 13) {
  61             manager.onEnterKey(e);
  62         }
  63         if(e.which === 8) {
  64             manager.onBackspaceKey(e);
  65         }
  66     });
  67
  68     canvas.dom.onShow = function() {
  69         if(!manager.shownAlready) {
  70             manager.shownAlready = true;
  71             manager.selectFirstNode();
  72         } else if(manager.currentNode) {
  73             manager.movecaretToNode(manager.getNodeElement(manager.currentNode));
  74             canvas.dom.find('#rng-module-documentCanvas-contentWrapper').scrollTop(manager.scrollbarPosition);
  75         }
  76     };
  77     canvas.dom.onHide = function() {
  78        manager.scrollbarPosition = canvas.dom.find('#rng-module-documentCanvas-contentWrapper').scrollTop();
  79     };
  80 };
  81
  82 Manager.prototype.selectNode = function(cnode, options) {
  83     options = options || {};
  84     var nodeElement = this.getNodeElement(cnode);
  85
  86     this.dimNode(cnode);
  87
  88     this.canvas.dom.find('.rng-module-documentCanvas-currentNode').removeClass('rng-module-documentCanvas-currentNode');
  89     nodeElement.addClass('rng-module-documentCanvas-currentNode');
  90
  91     if(options.movecaret) {
  92         this.movecaretToNode(nodeElement, options.movecaret);
  93     }
  94
  95     this.currentNode = cnode;
  96     this.sandbox.publish('nodeSelected', cnode);
  97 };
  98
  99 Manager.prototype.insertNewNode = function(wlxmlTag, wlxmlClass) {
 100     var selection = window.getSelection(),
 101         $anchorNode = $(selection.anchorNode),
 102         $focusNode = $(selection.focusNode);
 103
 104
 105     if(!selection.isCollapsed && $anchorNode.parent()[0] === $focusNode.parent()[0]) {
 106         var textNodeIdx,
 107             parent = $anchorNode.parent(),
 108             parentContents = parent.contents(),
 109             offsetStart = selection.anchorOffset,
 110             offsetEnd = selection.focusOffset;
 111
 112         if(selection.anchorNode === selection.focusNode) {
 113             if(offsetStart > offsetEnd) {
 114                 var tmp = offsetStart;
 115                 offsetStart = offsetEnd;
 116                 offsetEnd = tmp;
 117             }
 118             textNodeIdx = parentContents.index($anchorNode);
 119         } else {
 120             if(parentContents.index($anchorNode) > parentContents.index($focusNode)) {
 121                 offsetStart = selection.focusOffset;
 122                 offsetEnd = selection.anchorOffset;
 123             }
 124             textNodeIdx = [parentContents.index($anchorNode), parentContents.index($focusNode)];
 125         }
 126
 127         var wrapper = canvasNode.create({tag: wlxmlTag, klass: wlxmlClass});
 128         this.canvas.nodeWrap({inside: canvasNode.create(parent),
 129                               _with: wrapper,
 130                               offsetStart: offsetStart,
 131                               offsetEnd: offsetEnd,
 132                               textNodeIdx: textNodeIdx
 133                             });
 134         this.selectNode(wrapper, {movecaret: 'end'});
 135     }
 136
 137
 138 };
 139
 140 Manager.prototype.getNodeElement = function(cnode) {
 141     return this.canvas.dom.find('#'+cnode.getId());
 142 };
 143
 144 Manager.prototype.highlightNode = function(cnode) {
 145     var nodeElement = this.getNodeElement(cnode);
 146     if(!this.gridToggled) {
 147         nodeElement.addClass('rng-common-hoveredNode');
 148         var label = nodeElement.attr('wlxml-tag');
 149         if(nodeElement.attr('wlxml-class'))
 150             label += ' / ' + nodeElement.attr('wlxml-class');
 151         var tag = $('<div>').addClass('rng-module-documentCanvas-hoveredNodeTag').text(label);
 152         nodeElement.append(tag);
 153     }
 154 };
 155
 156 Manager.prototype.dimNode = function(cnode) {
 157     var nodeElement = this.getNodeElement(cnode);
 158     if(!this.gridToggled) {
 159         nodeElement.removeClass('rng-common-hoveredNode');
 160         nodeElement.find('.rng-module-documentCanvas-hoveredNodeTag').remove();
 161     }
 162 };
 163
 164 Manager.prototype.selectFirstNode = function() {
 165     var firstNodeWithText = this.canvas.dom.find('[wlxml-tag]').filter(function() {
 166         return $(this).clone().children().remove().end().text().trim() !== '';
 167     }).first();
 168     var node;
 169     if(firstNodeWithText.length)
 170         node = $(firstNodeWithText[0]);
 171     else {
 172         node = this.canvas.dom.find('[wlxml-class|="p"]');
 173     }
 174     this.selectNode(canvasNode.create(node), {movecaret: true});
 175 };
 176
 177 Manager.prototype.movecaretToNode = function(nodeElement, where) {
 178     if(!nodeElement.length)
 179         return;
 180     var range = document.createRange();
 181     range.selectNodeContents(nodeElement[0]);
 182
 183     var collapseArg = true;
 184     if(where === 'end')
 185         collapseArg = false;
 186     range.collapse(collapseArg);
 187     var selection = document.getSelection();
 188     selection.removeAllRanges();
 189     selection.addRange(range);
 190 };
 191
 192 Manager.prototype.toggleGrid =  function(toggle) {
 193     this.canvas.dom.find('[wlxml-tag]').toggleClass('rng-common-hoveredNode', toggle);
 194     this.gridToggled = toggle;
 195 };
 196
 197 Manager.prototype.onEnterKey = function(e) {
 198     e.preventDefault();
 199     var pos = getCursorPosition();
 200     var contextNode = this.canvas.getNodeById(pos.parentNode.attr('id'));
 201     var newNode;
 202
 203     if(pos.isAtEnd) {
 204         newNode = canvasNode.create({tag: pos.parentNode.attr('wlxml-tag'), klass: pos.parentNode.attr('wlxml-class')});
 205         this.canvas.nodeInsertAfter({node: newNode, after: this.canvas.getNodeById(pos.parentNode.attr('id'))});
 206     } else {
 207         newNode = this.canvas.nodeSplit({node: contextNode, textNodeIdx: pos.textNodeIndex, offset: pos.textNodeOffset});
 208     }
 209     if(newNode)
 210         this.selectNode(newNode, {movecaret: true});
 211     this.sandbox.publish('contentChanged');
 212 };
 213
 214 Manager.prototype.onBackspaceKey = function(e) {
 215     var pos = getCursorPosition();
 216     var len = pos.textNode.text().length;
 217     if(len === 1) {
 218         // Prevent deleting node by browser after last character removed;
 219         e.preventDefault();
 220         pos.parentNode.text('');
 221     }
 222     if(len === 0) {
 223         e.preventDefault();
 224         var toRemove = canvasNode.create(pos.textNode);
 225         var prevNode = this.canvas.getPrecedingNode({node:toRemove});
 226         this.canvas.nodeRemove({node: toRemove}); // jesli nie ma tekstu, to anchor nie jest tex nodem
 227         this.selectNode(prevNode, {movecaret: 'end'});
 228     }
 229 };
 230
 231 Manager.prototype.command = function(command, meta) {
 232     var pos = getCursorPosition();
 233
 234     if(command === 'createList') {
 235         var node = canvasNode.create(pos.parentNode);
 236         if(window.getSelection().getRangeAt(0).collapsed && this.canvas.nodeInsideList({node: node})) {
 237             this.canvas.listRemove({pointer: node});
 238             this.selectNode(node, {movecaret: 'end'});
 239             this.sandbox.publish('contentChanged');
 240         }
 241         else {
 242             //if(!this.canvas.nodeInsideList({node: node})) {
 243                 this.canvas.listCreate({start: node, end: canvasNode.create(pos.focusNode), type: meta});
 244                 this.selectNode(node, {movecaret: 'end'});
 245                 this.sandbox.publish('contentChanged');
 246             //}
 247         }
 248     }
 249
 250 };
 251
 252
 253 return Manager;
 254
 255 });