Repository navigation
Expand file tree
/
Copy pathview-util.ts
More file actions
439 lines (355 loc) · 12.2 KB
/
Copy pathview-util.ts
File metadata and controls
439 lines (355 loc) · 12.2 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
import { View, unsetValue, Placeholder, ContentView, LayoutBase, platformNames, Device } from '@nativescript/core';
import { CommentNode, InvisibleNode, NgView, TextNode, ViewExtensions, getViewClass, getViewMeta, isDetachedElement, isInvisibleNode, isKnownView, isView } from './element-registry';
import { NativeScriptDebug } from './trace';
const ELEMENT_NODE_TYPE = 1;
const XML_ATTRIBUTES = Object.freeze(['style', 'rows', 'columns', 'fontAttributes']);
const whiteSpaceSplitter = /\s+/;
// export type ViewExtensions = ViewExtensions;
// export type NgView = NgView;
export type NgLayoutBase = LayoutBase & ViewExtensions;
export type NgContentView = ContentView & ViewExtensions;
export type NgPlaceholder = Placeholder & ViewExtensions;
export type BeforeAttachAction = (view: View) => void;
export function isLayout(view: any): view is NgLayoutBase {
return view instanceof LayoutBase;
}
export function isContentView(view: any): view is NgContentView {
return view instanceof ContentView;
}
const propertyMaps: Map<Function, Map<string, string>> = new Map<Function, Map<string, string>>();
export class ViewUtil {
private isIos: boolean;
private isAndroid: boolean;
constructor(device: typeof Device) {
this.isIos = device.os === platformNames.ios;
this.isAndroid = device.os === platformNames.android;
}
public insertChild(parent: View, child: View, previous?: NgView, next?: NgView) {
if (!parent) {
return;
}
const extendedParent = this.ensureNgViewExtensions(parent);
const extendedChild = this.ensureNgViewExtensions(child);
// the element should be between previous and next
// if there's next but no previous, it's the first element
// if there's previous but no next, it's the last element
// elements that have no previous/next elements must be appended
if (!previous && !next) {
previous = extendedParent.lastChild;
}
this.addToQueue(extendedParent, extendedChild, previous, next);
if (isInvisibleNode(child)) {
extendedChild.parentNode = extendedParent;
}
if (!isDetachedElement(child)) {
const nextVisual = this.findNextVisual(next);
this.addToVisualTree(extendedParent, extendedChild, nextVisual);
}
}
private addToQueue(parent: NgView, child: NgView, previous: NgView, next: NgView): void {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`ViewUtil.addToQueue parent: ${parent}, view: ${child}, ` + `previous: ${previous}, next: ${next}`);
}
if (previous) {
previous.nextSibling = child;
child.previousSibling = previous;
} else {
parent.firstChild = child;
}
if (next) {
child.nextSibling = next;
next.previousSibling = child;
} else {
this.appendToQueue(parent, child);
}
}
private appendToQueue(parent: NgView, view: NgView) {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`ViewUtil.appendToQueue parent: ${parent} view: ${view}`);
}
if (parent.lastChild) {
parent.lastChild.nextSibling = view;
view.previousSibling = parent.lastChild;
}
parent.lastChild = view;
}
private addToVisualTree(parent: NgView, child: NgView, next: NgView): void {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`ViewUtil.addToVisualTree parent: ${parent}, view: ${child}, next: ${next}`);
}
if (parent.meta && parent.meta.insertChild) {
parent.meta.insertChild(parent, child, next);
} else if (isLayout(parent)) {
this.insertToLayout(parent, child, next);
} else if (isContentView(parent)) {
parent.content = child;
} else if (parent && (<any>parent)._addChildFromBuilder) {
(<any>parent)._addChildFromBuilder(child.nodeName, child);
}
}
private insertToLayout(parent: NgLayoutBase, child: NgView, next: NgView): void {
if (child.parent === parent) {
this.removeLayoutChild(parent, child);
}
const nextVisual = this.findNextVisual(next);
if (nextVisual) {
const index = parent.getChildIndex(nextVisual);
parent.insertChild(child, index);
} else {
parent.addChild(child);
}
}
private findNextVisual(view: NgView): NgView {
let next = view;
while (next && isDetachedElement(next)) {
next = next.nextSibling;
}
return next;
}
public removeChild(parent: View, child: View) {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`ViewUtil.removeChild parent: ${parent} child: ${child}`);
}
if (!parent) {
return;
}
const extendedParent = this.ensureNgViewExtensions(parent);
const extendedChild = this.ensureNgViewExtensions(child);
this.removeFromQueue(extendedParent, extendedChild);
if (!isDetachedElement(extendedChild)) {
this.removeFromVisualTree(extendedParent, extendedChild);
}
}
private removeFromQueue(parent: NgView, child: NgView) {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`ViewUtil.removeFromQueue parent: ${parent} child: ${child}`);
}
if (parent.firstChild === child && parent.lastChild === child) {
parent.firstChild = null;
parent.lastChild = null;
child.nextSibling = null;
child.previousSibling = null;
return;
}
if (parent.firstChild === child) {
parent.firstChild = child.nextSibling;
}
const previous = child.previousSibling;
if (parent.lastChild === child) {
parent.lastChild = previous;
}
if (previous) {
previous.nextSibling = child.nextSibling;
if (child.nextSibling) {
child.nextSibling.previousSibling = previous;
}
}
child.nextSibling = null;
child.previousSibling = null;
}
// NOTE: This one is O(n) - use carefully
private findPreviousElement(parent: NgView, child: NgView): NgView {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`ViewUtil.findPreviousElement parent: ${parent} child: ${child}`);
}
let previousVisual;
if (isLayout(parent)) {
previousVisual = this.getPreviousVisualElement(parent, child);
}
let previous = previousVisual || parent.firstChild;
// since detached elements are not added to the visual tree,
// we need to find the actual previous sibling of the view,
// which may as well be an invisible node
while (previous && previous !== child && previous.nextSibling !== child) {
previous = previous.nextSibling;
}
return previous;
}
private getPreviousVisualElement(parent: NgLayoutBase, child: NgView): NgView {
const elementIndex = parent.getChildIndex(child);
if (elementIndex > 0) {
return parent.getChildAt(elementIndex - 1) as NgView;
}
}
// NOTE: This one is O(n) - use carefully
public getChildIndex(parent: any, child: NgView) {
if (isLayout(parent)) {
return parent.getChildIndex(child);
} else if (isContentView(parent)) {
return child === parent.content ? 0 : -1;
}
}
private removeFromVisualTree(parent: NgView, child: NgView) {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`ViewUtil.removeFromVisualTree parent: ${parent} child: ${child}`);
}
if (parent.meta && parent.meta.removeChild) {
parent.meta.removeChild(parent, child);
} else if (isLayout(parent)) {
this.removeLayoutChild(parent, child);
} else if (isContentView(parent) && parent.content === child) {
parent.content = null;
} else if (isView(parent)) {
parent._removeView(child);
}
}
private removeLayoutChild(parent: NgLayoutBase, child: NgView): void {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`ViewUtil.removeLayoutChild parent: ${parent} child: ${child}`);
}
const index = parent.getChildIndex(child);
if (index !== -1) {
parent.removeChild(child);
}
}
public createComment(): InvisibleNode {
return new CommentNode();
}
public createText(): InvisibleNode {
return new TextNode();
}
public createView(name: string): NgView {
const originalName = name;
if (!isKnownView(name)) {
name = 'ProxyViewContainer';
}
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`Creating view: ${originalName} ${name}`);
}
const viewClass = getViewClass(name);
const view = <NgView>new viewClass();
const ngView = this.setNgViewExtensions(view, name);
return ngView;
}
private ensureNgViewExtensions(view: View): NgView {
if (view.hasOwnProperty('meta')) {
return view as NgView;
} else {
const name = view.cssType;
const ngView = this.setNgViewExtensions(view, name);
return ngView;
}
}
private setNgViewExtensions(view: View, name: string): NgView {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`Make into a NgView view: ${view} name: "${name}"`);
}
const ngView = view as NgView;
ngView.nodeName = name;
ngView.meta = getViewMeta(name);
// we're setting the node type of the view
// to 'element' because of checks done in the
// dom animation engine
ngView.nodeType = ELEMENT_NODE_TYPE;
return ngView;
}
public setProperty(view: NgView, attributeName: string, value: any, namespace?: string): void {
if (!view || (namespace && !this.runsIn(namespace))) {
return;
}
if (attributeName.indexOf('.') !== -1) {
// Handle nested properties
const properties = attributeName.split('.');
attributeName = properties[properties.length - 1];
let propMap = this.getProperties(view);
let i = 0;
while (i < properties.length - 1 && typeof view !== 'undefined') {
let prop = properties[i];
if (propMap.has(prop)) {
prop = propMap.get(prop);
}
view = view[prop];
propMap = this.getProperties(view);
i++;
}
}
if (typeof view !== 'undefined') {
this.setPropertyInternal(view, attributeName, value);
}
}
private runsIn(platform: string): boolean {
return (platform === 'ios' && this.isIos) || (platform === 'android' && this.isAndroid);
}
private setPropertyInternal(view: NgView, attributeName: string, value: any): void {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`Setting attribute: ${attributeName}=${value} to ${view}`);
}
if (attributeName === 'class') {
this.setClasses(view, value);
return;
}
if (XML_ATTRIBUTES.indexOf(attributeName) !== -1) {
view[attributeName] = value;
return;
}
const propMap = this.getProperties(view);
const propertyName = propMap.get(attributeName);
// Ensure the children of a collection currently have no parent set.
if (Array.isArray(value)) {
this.removeParentReferencesFromItems(value);
}
if (propertyName) {
// We have a lower-upper case mapped property.
view[propertyName] = value;
return;
}
// Unknown attribute value -- just set it to our object as is.
view[attributeName] = value;
}
private removeParentReferencesFromItems(items: any[]): void {
for (const item of items) {
if (item.parent && item.parentNode) {
if (NativeScriptDebug.isLogEnabled()) {
NativeScriptDebug.viewUtilLog(`Unassigning parent ${item.parentNode} on value: ${item}`);
}
item.parent = undefined;
item.parentNode = undefined;
}
}
}
private getProperties(instance: any): Map<string, string> {
const type = instance && instance.constructor;
if (!type) {
return new Map<string, string>();
}
if (!propertyMaps.has(type)) {
let propMap = new Map<string, string>();
for (let propName in instance) {
// tslint:disable:forin
propMap.set(propName.toLowerCase(), propName);
}
propertyMaps.set(type, propMap);
}
return propertyMaps.get(type);
}
private cssClasses(view: NgView) {
if (!view.ngCssClasses) {
view.ngCssClasses = new Map<string, boolean>();
}
return view.ngCssClasses;
}
public addClass(view: NgView, className: string): void {
this.cssClasses(view).set(className, true);
this.syncClasses(view);
}
public removeClass(view: NgView, className: string): void {
this.cssClasses(view).delete(className);
this.syncClasses(view);
}
private setClasses(view: NgView, classesValue: string): void {
let classes = classesValue.split(whiteSpaceSplitter);
this.cssClasses(view).clear();
classes.forEach((className) => this.cssClasses(view).set(className, true));
this.syncClasses(view);
}
private syncClasses(view: NgView): void {
let classValue = (<any>Array).from(this.cssClasses(view).keys()).join(' ');
view.className = classValue;
}
public setStyle(view: NgView, styleName: string, value: any) {
view.style[styleName] = value;
}
public removeStyle(view: NgView, styleName: string) {
view.style[styleName] = unsetValue;
}
}