4d3c2c1ee3941510d81f31ec4ed7da83c7a59191
[fnpeditor.git] / src / smartxml / core.js
1 define(function(require) {
2     
3 'use strict';
4 /* globals Node */
5
6 var _ = require('libs/underscore'),
7     TEXT_NODE = Node.TEXT_NODE;
8
9
10 var INSERTION = function(implementation) {
11     var toret = function(node) {
12         var insertion = this.getNodeInsertion(node),
13             nodeWasContained = this.document.containsNode(insertion.ofNode),
14             nodeParent;
15         if(!(this.document.containsNode(this))) {
16             nodeParent = insertion.ofNode.parent();
17         }
18         implementation.call(this, insertion.ofNode.nativeNode);
19         this.triggerChangeEvent(insertion.insertsNew ? 'nodeAdded' : 'nodeMoved', {node: insertion.ofNode}, nodeParent, nodeWasContained);
20         return insertion.ofNode;
21     };
22     return toret;
23 };
24
25 var documentNodeTransformations = {
26     detach: function() {
27         var parent = this.parent();
28         this._$.detach();
29         this.triggerChangeEvent('nodeDetached', {parent: parent});
30         return this;
31     },
32
33     replaceWith: function(node) {
34         var toret;
35         if(this.isRoot()) {
36             return this.document.replaceRoot(node);
37         }
38         toret = this.after(node);
39         this.detach();
40         return toret;
41     },
42
43     after: INSERTION(function(nativeNode) {
44         return this._$.after(nativeNode);
45     }),
46
47     before: INSERTION(function(nativeNode) {
48         return this._$.before(nativeNode);
49     }),
50
51     wrapWith: function(node) {
52         var insertion = this.getNodeInsertion(node);
53         if(this.parent()) {
54             this.before(insertion.ofNode);
55         }
56         insertion.ofNode.append(this);
57         return insertion.ofNode;
58     },
59
60     /**
61     * Removes parent of a node if node has no siblings.
62     */
63     unwrap: function() {
64         if(this.isRoot()) {
65             return;
66         }
67         var parent = this.parent(),
68             grandParent;
69         if(parent.contents().length === 1) {
70             grandParent = parent.parent();
71             parent.unwrapContent();
72             return grandParent;
73         }
74     }
75 };
76
77 var elementNodeTransformations = {
78
79     detach: function() {
80         var next;
81         if(this.parent() && this.isSurroundedByTextElements()) {
82             next = this.next();
83             this.prev().appendText(next.getText());
84             next.detach();
85         }
86         return this.__super__.detach();
87     },
88
89     setTag: function(tagName) {
90         var node = this.document.createDocumentNode({tagName: tagName}),
91             oldTagName = this.getTagName(),
92             myContents = this._$.contents();
93
94         this.getAttrs().forEach(function(attribute) {
95             node.setAttr(attribute.name, attribute.value, true);
96         });
97         node.setData(this.getData());
98
99         if(this.sameNode(this.document.root)) {
100             this.document._defineDocumentProperties(node._$);
101         }
102
103         /* TODO: This invalidates old references to this node. Caching instances on nodes would fix this. */
104         this._$.replaceWith(node._$);
105         this._setNativeNode(node._$[0]);
106         this._$.append(myContents);
107         this.triggerChangeEvent('nodeTagChange', {oldTagName: oldTagName, newTagName: this.getTagName()});
108     },
109
110
111     setAttr: function(name, value, silent) {
112         var oldVal = this.getAttr(name);
113         this._$.attr(name, value);
114         if(!silent) {
115             this.triggerChangeEvent('nodeAttrChange', {attr: name, oldVal: oldVal, newVal: value});
116         }
117     },
118
119     append: INSERTION(function(nativeNode) {
120         this._$.append(nativeNode);
121     }),
122
123     prepend: INSERTION(function(nativeNode) {
124         this._$.prepend(nativeNode);
125     }),
126
127     insertAtIndex: function(nativeNode, index) {
128         var contents = this.contents();
129         if(index < contents.length) {
130             return contents[index].before(nativeNode);
131         } else if(index === contents.length) {
132             return this.append(nativeNode);
133         }
134     },
135
136     unwrapContent: function() {
137         var parent = this.parent();
138         if(!parent) {
139             return;
140         }
141
142         var myContents = this.contents(),
143             myIdx = parent.indexOf(this);
144
145
146         if(myContents.length === 0) {
147             return this.detach();
148         }
149
150         var prev = this.prev(),
151             next = this.next(),
152             moveLeftRange, moveRightRange, leftMerged;
153
154         if(prev && (prev.nodeType === TEXT_NODE) && (myContents[0].nodeType === TEXT_NODE)) {
155             prev.appendText(myContents[0].getText());
156             myContents[0].detach();
157             moveLeftRange = true;
158             leftMerged = true;
159         } else {
160             leftMerged = false;
161         }
162
163         if(!(leftMerged && myContents.length === 1)) {
164             var lastContents = _.last(myContents);
165             if(next && (next.nodeType === TEXT_NODE) && (lastContents.nodeType === TEXT_NODE)) {
166                 next.prependText(lastContents.getText());
167                 lastContents.detach();
168                 moveRightRange = true;
169             }
170         }
171
172         var childrenLength = this.contents().length;
173         this.contents().forEach(function(child) {
174             this.before(child);
175         }.bind(this));
176
177         this.detach();
178
179         return {
180             element1: parent.contents()[myIdx + (moveLeftRange ? -1 : 0)],
181             element2: parent.contents()[myIdx + childrenLength-1 + (moveRightRange ? 1 : 0)]
182         };
183     },
184
185     wrapText: function(params) {
186         return this.document._wrapText(_.extend({inside: this}, params));
187     }
188 };
189
190 var textNodeTransformations = {
191     setText: {
192         impl: function(t, text) {
193             t.oldText = this.getText();
194             this.nativeNode.data = text;
195             this.triggerTextChangeEvent();
196         },
197         undo: function(t) {
198             this.setText(t.oldText);
199         }
200     },
201
202     appendText: function(text) {
203         this.nativeNode.data = this.nativeNode.data + text;
204         this.triggerTextChangeEvent();
205     },
206
207     prependText: function(text) {
208         this.nativeNode.data = text + this.nativeNode.data;
209         this.triggerTextChangeEvent();
210     },
211
212     wrapWith: function(desc) {
213         if(typeof desc.start === 'number' && typeof desc.end === 'number') {
214             return this.document._wrapText({
215                 inside: this.parent(),
216                 textNodeIdx: this.parent().indexOf(this),
217                 offsetStart: Math.min(desc.start, desc.end),
218                 offsetEnd: Math.max(desc.start, desc.end),
219                 _with: {tagName: desc.tagName, attrs: desc.attrs}
220             });
221         } else {
222             return this.__super__.wrapWith.call(this, desc);
223         }
224     },
225
226     split: function(params) {
227         var parentElement = this.parent(),
228             passed = false,
229             succeedingChildren = [],
230             prefix = this.getText().substr(0, params.offset),
231             suffix = this.getText().substr(params.offset);
232
233         parentElement.contents().forEach(function(child) {
234             if(passed) {
235                 succeedingChildren.push(child);
236             }
237             if(child.sameNode(this)) {
238                 passed = true;
239             }
240         }.bind(this));
241
242         if(prefix.length > 0) {
243             this.setText(prefix);
244         }
245         else {
246             this.detach();
247         }
248
249         var attrs = {};
250         parentElement.getAttrs().forEach(function(attr) {attrs[attr.name] = attr.value; });
251         var newElement = this.document.createDocumentNode({tagName: parentElement.getTagName(), attrs: attrs});
252         parentElement.after(newElement);
253
254         if(suffix.length > 0) {
255             newElement.append({text: suffix});
256         }
257         succeedingChildren.forEach(function(child) {
258             newElement.append(child);
259         });
260
261         return {first: parentElement, second: newElement};
262     },
263
264     divideWithElementNode: function(node, params) {
265         var insertion = this.getNodeInsertion(node),
266             myText = this.getText();
267
268         if(params.offset === myText.length) {
269             return this.after(node);
270         }
271         if(params.offset === 0) {
272             return this.before(node);
273         }
274
275         var lhsText = myText.substr(0, params.offset),
276             rhsText = myText.substr(params.offset),
277             rhsTextNode = this.document.createDocumentNode({text: rhsText});
278
279         this.setText(lhsText);
280         this.after(insertion.ofNode);
281         insertion.ofNode.after(rhsTextNode);
282         return insertion.ofNode;
283     }
284 };
285
286 var documentTransformations = {
287     wrapNodes: function(params) {
288         if(!(params.node1.parent().sameNode(params.node2.parent()))) {
289             throw new Error('Wrapping non-sibling nodes not supported.');
290         }
291
292         var parent = params.node1.parent(),
293             parentContents = parent.contents(),
294             wrapper = this.createDocumentNode({
295                 tagName: params._with.tagName,
296                 attrs: params._with.attrs}),
297             idx1 = parent.indexOf(params.node1),
298             idx2 = parent.indexOf(params.node2);
299
300         if(idx1 > idx2) {
301             var tmp = idx1;
302             idx1 = idx2;
303             idx2 = tmp;
304         }
305
306         var insertingMethod, insertingTarget;
307         if(idx1 === 0) {
308             insertingMethod = 'prepend';
309             insertingTarget = parent;
310         } else {
311             insertingMethod = 'after';
312             insertingTarget = parentContents[idx1-1];
313         }
314
315         for(var i = idx1; i <= idx2; i++) {
316             wrapper.append(parentContents[i].detach());
317         }
318
319         insertingTarget[insertingMethod](wrapper);
320         return wrapper;
321     },
322
323     _wrapText: function(params) {
324         params = _.extend({textNodeIdx: 0}, params);
325         if(typeof params.textNodeIdx === 'number') {
326             params.textNodeIdx = [params.textNodeIdx];
327         }
328         
329         var contentsInside = params.inside.contents(),
330             idx1 = Math.min.apply(Math, params.textNodeIdx),
331             idx2 = Math.max.apply(Math, params.textNodeIdx),
332             textNode1 = contentsInside[idx1],
333             textNode2 = contentsInside[idx2],
334             sameNode = textNode1.sameNode(textNode2),
335             prefixOutside = textNode1.getText().substr(0, params.offsetStart),
336             prefixInside = textNode1.getText().substr(params.offsetStart),
337             suffixInside = textNode2.getText().substr(0, params.offsetEnd),
338             suffixOutside = textNode2.getText().substr(params.offsetEnd)
339         ;
340
341         if(!(textNode1.parent().sameNode(textNode2.parent()))) {
342             throw new Error('Wrapping text in non-sibling text nodes not supported.');
343         }
344         
345         var wrapperElement = this.createDocumentNode({tagName: params._with.tagName, attrs: params._with.attrs});
346         textNode1.after(wrapperElement);
347         textNode1.detach();
348         
349         if(prefixOutside.length > 0) {
350             wrapperElement.before({text:prefixOutside});
351         }
352         if(sameNode) {
353             var core = textNode1.getText().substr(params.offsetStart, params.offsetEnd - params.offsetStart);
354             wrapperElement.append({text: core});
355         } else {
356             textNode2.detach();
357             if(prefixInside.length > 0) {
358                 wrapperElement.append({text: prefixInside});
359             }
360             for(var i = idx1 + 1; i < idx2; i++) {
361                 wrapperElement.append(contentsInside[i]);
362             }
363             if(suffixInside.length > 0) {
364                 wrapperElement.append({text: suffixInside});
365             }
366         }
367         if(suffixOutside.length > 0) {
368             wrapperElement.after({text: suffixOutside});
369         }
370         return wrapperElement;
371     },
372     replaceRoot: function(node) {
373         var insertion = this.getNodeInsertion(node);
374         this.root.detach();
375         this._defineDocumentProperties(insertion.ofNode._$);
376         insertion.ofNode.triggerChangeEvent('nodeAdded');
377         return insertion.ofNode;
378     }
379 };
380
381 return {
382     document: {
383         transformations: documentTransformations
384     },
385     documentNode: {
386         transformations: documentNodeTransformations
387     },
388     elementNode: {
389         transformations: elementNodeTransformations
390     },
391     textNode: {
392         transformations: textNodeTransformations
393     }
394 };
395
396 });