summaryrefslogtreecommitdiffstats
path: root/server/src/com/vaadin/terminal/Page.java
blob: 66ef7da2966e67a79d748caacc2d2d0e2b79da89 (plain)
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
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
/* 
 * Copyright 2011 Vaadin Ltd.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */

package com.vaadin.terminal;

import java.io.Serializable;
import java.lang.reflect.Method;
import java.util.EventObject;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;

import com.vaadin.event.EventRouter;
import com.vaadin.shared.ui.BorderStyle;
import com.vaadin.shared.ui.ui.PageClientRpc;
import com.vaadin.shared.ui.ui.UIConstants;
import com.vaadin.terminal.WrappedRequest.BrowserDetails;
import com.vaadin.terminal.gwt.server.WebApplicationContext;
import com.vaadin.terminal.gwt.server.WebBrowser;
import com.vaadin.tools.ReflectTools;
import com.vaadin.ui.JavaScript;
import com.vaadin.ui.Notification;
import com.vaadin.ui.UI;

public class Page implements Serializable {

    /**
     * Listener that gets notified when the size of the browser window
     * containing the uI has changed.
     * 
     * @see UI#addListener(BrowserWindowResizeListener)
     */
    public interface BrowserWindowResizeListener extends Serializable {
        /**
         * Invoked when the browser window containing a UI has been resized.
         * 
         * @param event
         *            a browser window resize event
         */
        public void browserWindowResized(BrowserWindowResizeEvent event);
    }

    /**
     * Event that is fired when a browser window containing a uI is resized.
     */
    public class BrowserWindowResizeEvent extends EventObject {

        private final int width;
        private final int height;

        /**
         * Creates a new event
         * 
         * @param source
         *            the uI for which the browser window has been resized
         * @param width
         *            the new width of the browser window
         * @param height
         *            the new height of the browser window
         */
        public BrowserWindowResizeEvent(Page source, int width, int height) {
            super(source);
            this.width = width;
            this.height = height;
        }

        @Override
        public Page getSource() {
            return (Page) super.getSource();
        }

        /**
         * Gets the new browser window height
         * 
         * @return an integer with the new pixel height of the browser window
         */
        public int getHeight() {
            return height;
        }

        /**
         * Gets the new browser window width
         * 
         * @return an integer with the new pixel width of the browser window
         */
        public int getWidth() {
            return width;
        }
    }

    /**
     * Private class for storing properties related to opening resources.
     */
    private class OpenResource implements Serializable {

        /**
         * The resource to open
         */
        private final Resource resource;

        /**
         * The name of the target window
         */
        private final String name;

        /**
         * The width of the target window
         */
        private final int width;

        /**
         * The height of the target window
         */
        private final int height;

        /**
         * The border style of the target window
         */
        private final BorderStyle border;

        /**
         * Creates a new open resource.
         * 
         * @param resource
         *            The resource to open
         * @param name
         *            The name of the target window
         * @param width
         *            The width of the target window
         * @param height
         *            The height of the target window
         * @param border
         *            The border style of the target window
         */
        private OpenResource(Resource resource, String name, int width,
                int height, BorderStyle border) {
            this.resource = resource;
            this.name = name;
            this.width = width;
            this.height = height;
            this.border = border;
        }

        /**
         * Paints the open request. Should be painted inside the window.
         * 
         * @param target
         *            the paint target
         * @throws PaintException
         *             if the paint operation fails
         */
        private void paintContent(PaintTarget target) throws PaintException {
            target.startTag("open");
            target.addAttribute("src", resource);
            if (name != null && name.length() > 0) {
                target.addAttribute("name", name);
            }
            if (width >= 0) {
                target.addAttribute("width", width);
            }
            if (height >= 0) {
                target.addAttribute("height", height);
            }
            switch (border) {
            case MINIMAL:
                target.addAttribute("border", "minimal");
                break;
            case NONE:
                target.addAttribute("border", "none");
                break;
            }

            target.endTag("open");
        }
    }

    private static final Method BROWSWER_RESIZE_METHOD = ReflectTools
            .findMethod(BrowserWindowResizeListener.class,
                    "browserWindowResized", BrowserWindowResizeEvent.class);

    /**
     * A border style used for opening resources in a window without a border.
     */
    @Deprecated
    public static final BorderStyle BORDER_NONE = BorderStyle.NONE;

    /**
     * A border style used for opening resources in a window with a minimal
     * border.
     */
    public static final BorderStyle BORDER_MINIMAL = BorderStyle.MINIMAL;

    /**
     * A border style that indicates that the default border style should be
     * used when opening resources.
     */
    public static final BorderStyle BORDER_DEFAULT = BorderStyle.DEFAULT;

    /**
     * Listener that listens changes in URI fragment.
     */
    public interface FragmentChangedListener extends Serializable {
        public void fragmentChanged(FragmentChangedEvent event);
    }

    private static final Method FRAGMENT_CHANGED_METHOD = ReflectTools
            .findMethod(Page.FragmentChangedListener.class, "fragmentChanged",
                    FragmentChangedEvent.class);

    /**
     * Resources to be opened automatically on next repaint. The list is
     * automatically cleared when it has been sent to the client.
     */
    private final LinkedList<OpenResource> openList = new LinkedList<OpenResource>();

    /**
     * A list of notifications that are waiting to be sent to the client.
     * Cleared (set to null) when the notifications have been sent.
     */
    private List<Notification> notifications;

    /**
     * Event fired when uri fragment changes.
     */
    public class FragmentChangedEvent extends EventObject {

        /**
         * The new uri fragment
         */
        private final String fragment;

        /**
         * Creates a new instance of UriFragmentReader change event.
         * 
         * @param source
         *            the Source of the event.
         */
        public FragmentChangedEvent(Page source, String fragment) {
            super(source);
            this.fragment = fragment;
        }

        /**
         * Gets the uI in which the fragment has changed.
         * 
         * @return the uI in which the fragment has changed
         */
        public Page getPage() {
            return (Page) getSource();
        }

        /**
         * Get the new fragment
         * 
         * @return the new fragment
         */
        public String getFragment() {
            return fragment;
        }
    }

    private EventRouter eventRouter;

    /**
     * The current URI fragment.
     */
    private String fragment;

    private final UI uI;

    private int browserWindowWidth = -1;
    private int browserWindowHeight = -1;

    private JavaScript javaScript;

    public Page(UI uI) {
        this.uI = uI;
    }

    private void addListener(Class<?> eventType, Object target, Method method) {
        if (eventRouter == null) {
            eventRouter = new EventRouter();
        }
        eventRouter.addListener(eventType, target, method);
    }

    private void removeListener(Class<?> eventType, Object target, Method method) {
        if (eventRouter != null) {
            eventRouter.removeListener(eventType, target, method);
        }
    }

    public void addListener(Page.FragmentChangedListener listener) {
        addListener(FragmentChangedEvent.class, listener,
                FRAGMENT_CHANGED_METHOD);
    }

    public void removeListener(Page.FragmentChangedListener listener) {
        removeListener(FragmentChangedEvent.class, listener,
                FRAGMENT_CHANGED_METHOD);
    }

    /**
     * Sets URI fragment. Optionally fires a {@link FragmentChangedEvent}
     * 
     * @param newFragment
     *            id of the new fragment
     * @param fireEvent
     *            true to fire event
     * @see FragmentChangedEvent
     * @see Page.FragmentChangedListener
     */
    public void setFragment(String newFragment, boolean fireEvents) {
        if (newFragment == null) {
            throw new NullPointerException("The fragment may not be null");
        }
        if (!newFragment.equals(fragment)) {
            fragment = newFragment;
            if (fireEvents) {
                fireEvent(new FragmentChangedEvent(this, newFragment));
            }
            uI.markAsDirty();
        }
    }

    private void fireEvent(EventObject event) {
        if (eventRouter != null) {
            eventRouter.fireEvent(event);
        }
    }

    /**
     * Sets URI fragment. This method fires a {@link FragmentChangedEvent}
     * 
     * @param newFragment
     *            id of the new fragment
     * @see FragmentChangedEvent
     * @see Page.FragmentChangedListener
     */
    public void setFragment(String newFragment) {
        setFragment(newFragment, true);
    }

    /**
     * Gets currently set URI fragment.
     * <p>
     * To listen changes in fragment, hook a
     * {@link Page.FragmentChangedListener}.
     * 
     * @return the current fragment in browser uri or null if not known
     */
    public String getFragment() {
        return fragment;
    }

    public void init(WrappedRequest request) {
        BrowserDetails browserDetails = request.getBrowserDetails();
        if (browserDetails != null) {
            fragment = browserDetails.getUriFragment();
        }
    }

    public WebBrowser getWebBrowser() {
        return ((WebApplicationContext) uI.getApplication().getContext())
                .getBrowser();
    }

    public void setBrowserWindowSize(int width, int height) {
        boolean fireEvent = false;

        if (width != browserWindowWidth) {
            browserWindowWidth = width;
            fireEvent = true;
        }

        if (height != browserWindowHeight) {
            browserWindowHeight = height;
            fireEvent = true;
        }

        if (fireEvent) {
            fireEvent(new BrowserWindowResizeEvent(this, browserWindowWidth,
                    browserWindowHeight));
        }

    }

    /**
     * Adds a new {@link BrowserWindowResizeListener} to this uI. The listener
     * will be notified whenever the browser window within which this uI
     * resides is resized.
     * 
     * @param resizeListener
     *            the listener to add
     * 
     * @see BrowserWindowResizeListener#browserWindowResized(BrowserWindowResizeEvent)
     * @see #setResizeLazy(boolean)
     */
    public void addListener(BrowserWindowResizeListener resizeListener) {
        addListener(BrowserWindowResizeEvent.class, resizeListener,
                BROWSWER_RESIZE_METHOD);
    }

    /**
     * Removes a {@link BrowserWindowResizeListener} from this uI. The
     * listener will no longer be notified when the browser window is resized.
     * 
     * @param resizeListener
     *            the listener to remove
     */
    public void removeListener(BrowserWindowResizeListener resizeListener) {
        removeListener(BrowserWindowResizeEvent.class, resizeListener,
                BROWSWER_RESIZE_METHOD);
    }

    /**
     * Gets the last known height of the browser window in which this uI
     * resides.
     * 
     * @return the browser window height in pixels
     */
    public int getBrowserWindowHeight() {
        return browserWindowHeight;
    }

    /**
     * Gets the last known width of the browser window in which this uI
     * resides.
     * 
     * @return the browser window width in pixels
     */
    public int getBrowserWindowWidth() {
        return browserWindowWidth;
    }

    public JavaScript getJavaScript() {
        if (javaScript == null) {
            // Create and attach on first use
            javaScript = new JavaScript();
            javaScript.extend(uI);
        }

        return javaScript;
    }

    public void paintContent(PaintTarget target) throws PaintException {
        if (!openList.isEmpty()) {
            for (final Iterator<OpenResource> i = openList.iterator(); i
                    .hasNext();) {
                (i.next()).paintContent(target);
            }
            openList.clear();
        }

        // Paint notifications
        if (notifications != null) {
            target.startTag("notifications");
            for (final Iterator<Notification> it = notifications.iterator(); it
                    .hasNext();) {
                final Notification n = it.next();
                target.startTag("notification");
                if (n.getCaption() != null) {
                    target.addAttribute(
                            UIConstants.ATTRIBUTE_NOTIFICATION_CAPTION,
                            n.getCaption());
                }
                if (n.getDescription() != null) {
                    target.addAttribute(
                            UIConstants.ATTRIBUTE_NOTIFICATION_MESSAGE,
                            n.getDescription());
                }
                if (n.getIcon() != null) {
                    target.addAttribute(
                            UIConstants.ATTRIBUTE_NOTIFICATION_ICON,
                            n.getIcon());
                }
                if (!n.isHtmlContentAllowed()) {
                    target.addAttribute(
                            UIConstants.NOTIFICATION_HTML_CONTENT_NOT_ALLOWED,
                            true);
                }
                target.addAttribute(
                        UIConstants.ATTRIBUTE_NOTIFICATION_POSITION, n
                                .getPosition().ordinal());
                target.addAttribute(UIConstants.ATTRIBUTE_NOTIFICATION_DELAY,
                        n.getDelayMsec());
                if (n.getStyleName() != null) {
                    target.addAttribute(
                            UIConstants.ATTRIBUTE_NOTIFICATION_STYLE,
                            n.getStyleName());
                }
                target.endTag("notification");
            }
            target.endTag("notifications");
            notifications = null;
        }

        if (fragment != null) {
            target.addAttribute(UIConstants.FRAGMENT_VARIABLE, fragment);
        }

    }

    /**
     * Opens the given resource in this uI. The contents of this UI is
     * replaced by the {@code Resource}.
     * 
     * @param resource
     *            the resource to show in this uI
     */
    public void open(Resource resource) {
        openList.add(new OpenResource(resource, null, -1, -1, BORDER_DEFAULT));
        uI.markAsDirty();
    }

    /**
     * Opens the given resource in a window with the given name.
     * <p>
     * The supplied {@code windowName} is used as the target name in a
     * window.open call in the client. This means that special values such as
     * "_blank", "_self", "_top", "_parent" have special meaning. An empty or
     * <code>null</code> window name is also a special case.
     * </p>
     * <p>
     * "", null and "_self" as {@code windowName} all causes the resource to be
     * opened in the current window, replacing any old contents. For
     * downloadable content you should avoid "_self" as "_self" causes the
     * client to skip rendering of any other changes as it considers them
     * irrelevant (the page will be replaced by the resource). This can speed up
     * the opening of a resource, but it might also put the client side into an
     * inconsistent state if the window content is not completely replaced e.g.,
     * if the resource is downloaded instead of displayed in the browser.
     * </p>
     * <p>
     * "_blank" as {@code windowName} causes the resource to always be opened in
     * a new window or tab (depends on the browser and browser settings).
     * </p>
     * <p>
     * "_top" and "_parent" as {@code windowName} works as specified by the HTML
     * standard.
     * </p>
     * <p>
     * Any other {@code windowName} will open the resource in a window with that
     * name, either by opening a new window/tab in the browser or by replacing
     * the contents of an existing window with that name.
     * </p>
     * 
     * @param resource
     *            the resource.
     * @param windowName
     *            the name of the window.
     */
    public void open(Resource resource, String windowName) {
        openList.add(new OpenResource(resource, windowName, -1, -1,
                BORDER_DEFAULT));
        uI.markAsDirty();
    }

    /**
     * Opens the given resource in a window with the given size, border and
     * name. For more information on the meaning of {@code windowName}, see
     * {@link #open(Resource, String)}.
     * 
     * @param resource
     *            the resource.
     * @param windowName
     *            the name of the window.
     * @param width
     *            the width of the window in pixels
     * @param height
     *            the height of the window in pixels
     * @param border
     *            the border style of the window.
     */
    public void open(Resource resource, String windowName, int width,
            int height, BorderStyle border) {
        openList.add(new OpenResource(resource, windowName, width, height,
                border));
        uI.markAsDirty();
    }

    /**
     * Internal helper method to actually add a notification.
     * 
     * @param notification
     *            the notification to add
     */
    private void addNotification(Notification notification) {
        if (notifications == null) {
            notifications = new LinkedList<Notification>();
        }
        notifications.add(notification);
        uI.markAsDirty();
    }

    /**
     * Shows a notification message.
     * 
     * @see Notification
     * 
     * @param notification
     *            The notification message to show
     * 
     * @deprecated Use Notification.show(Page) instead.
     */
    @Deprecated
    public void showNotification(Notification notification) {
        addNotification(notification);
    }

    /**
     * Gets the Page to which the current uI belongs. This is automatically
     * defined when processing requests to the server. In other cases, (e.g.
     * from background threads), the current uI is not automatically defined.
     * 
     * @see UI#getCurrent()
     * 
     * @return the current page instance if available, otherwise
     *         <code>null</code>
     */
    public static Page getCurrent() {
        UI currentUI = UI.getCurrent();
        if (currentUI == null) {
            return null;
        }
        return currentUI.getPage();
    }

    /**
     * Sets the page title. The page title is displayed by the browser e.g. as
     * the title of the browser window or as the title of the tab.
     * 
     * @param title
     *            the new page title to set
     */
    public void setTitle(String title) {
        uI.getRpcProxy(PageClientRpc.class).setTitle(title);
    }

}