summaryrefslogtreecommitdiffstats
blob: ce3e9cdb49ae03ad1bd6689be1d659dd484ebbe4 (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
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
/*
 * Copyright (c) 2010-2017 Isode Limited.
 * All rights reserved.
 * See the COPYING file for more information.
 */

#include <Swift/QtUI/QtWebKitChatView.h>

#include <QApplication>
#include <QDesktopServices>
#include <QDesktopWidget>
#include <QEventLoop>
#include <QFile>
#include <QFileDialog>
#include <QFileInfo>
#include <QInputDialog>
#include <QKeyEvent>
#include <QMessageBox>
#include <QStackedWidget>
#include <QTimer>
#include <QVBoxLayout>
#include <QWebFrame>
#include <QWebSettings>
#include <QtDebug>

#include <Swiften/Base/FileSize.h>
#include <Swiften/Base/Log.h>
#include <Swiften/StringCodecs/Base64.h>

#include <Swift/Controllers/UIEvents/JoinMUCUIEvent.h>
#include <Swift/Controllers/UIEvents/UIEventStream.h>

#include <Swift/QtUI/MessageSnippet.h>
#include <Swift/QtUI/QtChatWindow.h>
#include <Swift/QtUI/QtChatWindowJSBridge.h>
#include <Swift/QtUI/QtScaledAvatarCache.h>
#include <Swift/QtUI/QtSwiftUtil.h>
#include <Swift/QtUI/QtUtilities.h>
#include <Swift/QtUI/QtWebView.h>
#include <Swift/QtUI/SystemMessageSnippet.h>

namespace Swift {

const QString QtWebKitChatView::ButtonWhiteboardSessionCancel = QString("whiteboard-cancel");
const QString QtWebKitChatView::ButtonWhiteboardSessionAcceptRequest = QString("whiteboard-acceptrequest");
const QString QtWebKitChatView::ButtonWhiteboardShowWindow = QString("whiteboard-showwindow");
const QString QtWebKitChatView::ButtonFileTransferCancel = QString("filetransfer-cancel");
const QString QtWebKitChatView::ButtonFileTransferSetDescription = QString("filetransfer-setdescription");
const QString QtWebKitChatView::ButtonFileTransferSendRequest = QString("filetransfer-sendrequest");
const QString QtWebKitChatView::ButtonFileTransferAcceptRequest = QString("filetransfer-acceptrequest");
const QString QtWebKitChatView::ButtonFileTransferOpenFile = QString("filetransfer-openfile");
const QString QtWebKitChatView::ButtonMUCInvite = QString("mucinvite");

namespace {
    const double minimalFontScaling = 0.8;
}

QtWebKitChatView::QtWebKitChatView(QtChatWindow* window, UIEventStream* eventStream, QtChatTheme* theme, QWidget* parent, bool disableAutoScroll) : QtChatView(parent), window_(window), eventStream_(eventStream), fontSizeSteps_(0), disableAutoScroll_(disableAutoScroll), previousMessageKind_(PreviosuMessageWasNone), previousMessageWasSelf_(false), showEmoticons_(false), insertingLastLine_(false), idCounter_(0) {
    theme_ = theme;

    QVBoxLayout* mainLayout = new QVBoxLayout(this);
    mainLayout->setSpacing(0);
    mainLayout->setContentsMargins(0,0,0,0);
    webView_ = new QtWebView(this);
    connect(webView_, SIGNAL(linkClicked(const QUrl&)), SLOT(handleLinkClicked(const QUrl&)));
    connect(webView_, SIGNAL(loadFinished(bool)), SLOT(handleViewLoadFinished(bool)));
    connect(webView_, SIGNAL(gotFocus()), SIGNAL(gotFocus()));
    connect(webView_, SIGNAL(clearRequested()), SLOT(handleClearRequested()));
    connect(webView_, SIGNAL(fontGrowRequested()), SLOT(increaseFontSize()));
    connect(webView_, SIGNAL(fontShrinkRequested()), SLOT(decreaseFontSize()));
#if defined (Q_OS_UNIX) && !defined(Q_OS_MAC)
    /* To give a border on Linux, where it looks bad without */
    QStackedWidget* stack = new QStackedWidget(this);
    stack->addWidget(webView_);
    stack->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
    stack->setLineWidth(2);
    mainLayout->addWidget(stack);
#else
    mainLayout->addWidget(webView_);
#endif

#ifdef SWIFT_EXPERIMENTAL_FT
    setAcceptDrops(true);
#endif

    webPage_ = new QWebPage(this);
    webPage_->setLinkDelegationPolicy(QWebPage::DelegateAllLinks);
    if (Log::getLogLevel() == Log::debug) {
        webPage_->settings()->setAttribute(QWebSettings::DeveloperExtrasEnabled, true);
    }
    webView_->setPage(webPage_);
    connect(webPage_, SIGNAL(selectionChanged()), SLOT(copySelectionToClipboard()));

    viewReady_ = false;
    isAtBottom_ = true;
    resetView();

    jsBridge = new QtChatWindowJSBridge();
    addToJSEnvironment("chatwindow", jsBridge);
    connect(jsBridge, SIGNAL(buttonClicked(QString,QString,QString,QString,QString,QString)), this, SLOT(handleHTMLButtonClicked(QString,QString,QString,QString,QString,QString)));
    connect(jsBridge, SIGNAL(verticalScrollBarPositionChanged(double)), this, SLOT(handleVerticalScrollBarPositionChanged(double)));
}

QtWebKitChatView::~QtWebKitChatView() {
    delete jsBridge;
}

void QtWebKitChatView::handleClearRequested() {
    QMessageBox messageBox(this);
    messageBox.setWindowTitle(tr("Clear log"));
    messageBox.setText(tr("You are about to clear the contents of your chat log."));
    messageBox.setInformativeText(tr("Are you sure?"));
    messageBox.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
    messageBox.setDefaultButton(QMessageBox::Yes);
    int button = messageBox.exec();
    if (button == QMessageBox::Yes) {
        logCleared();
        resetView();
        resizeFont(fontSizeSteps_);
    }
}

void QtWebKitChatView::handleKeyPressEvent(QKeyEvent* event) {
    webView_->keyPressEvent(event);
}

void QtWebKitChatView::addMessageBottom(std::shared_ptr<ChatSnippet> snippet) {
    if (viewReady_) {
        addToDOM(snippet);
    } else {
        /* If this asserts, the previous queuing code was necessary and should be reinstated */
        assert(false);
    }
}

void QtWebKitChatView::addMessageTop(std::shared_ptr<ChatSnippet> /* snippet */) {
    // TODO: Implement this in a sensible manner later.
    SWIFT_LOG(error) << "Not yet implemented!" << std::endl;
}

void QtWebKitChatView::addToDOM(std::shared_ptr<ChatSnippet> snippet) {
    //qDebug() << snippet->getContent();
    rememberScrolledToBottom();

    QWebElement insertElement = webPage_->mainFrame()->findFirstElement("#insert");
    assert(!insertElement.isNull());
    insertElement.prependOutside(snippet->getContent());

    //qDebug() << "-----------------";
    //qDebug() << webPage_->mainFrame()->toHtml();
}

void QtWebKitChatView::addLastSeenLine() {
    // Remove a potentially existing unread bar.
    QWebElement existingUnreadBar = webPage_->mainFrame()->findFirstElement("div.unread");
    if (!existingUnreadBar.isNull()) {
        existingUnreadBar.removeFromDocument();
    }

    QWebElement insertElement = webPage_->mainFrame()->findFirstElement("#insert");
    insertElement.prependOutside(theme_->getUnread());
}

void QtWebKitChatView::replaceLastMessage(const QString& newMessage, const ChatWindow::TimestampBehaviour timestampBehaviour) {
    rememberScrolledToBottom();
    QWebElement insertElement = webPage_->mainFrame()->findFirstElement("#insert");
    assert(!insertElement.isNull());

    QWebElement lastMessageElement = insertElement.previousSibling();
    QWebElement messageChild = lastMessageElement.findFirst("span.swift_message");
    assert(!messageChild.isNull());
    messageChild.setInnerXml(ChatSnippet::escape(newMessage));
    if (timestampBehaviour == ChatWindow::UpdateTimestamp) {
        QWebElement timeChild = lastMessageElement.findFirst("span.swift_time");
        assert(!timeChild.isNull());
        timeChild.setInnerXml(ChatSnippet::timeToEscapedString(QDateTime::currentDateTime()));
    }
}

void QtWebKitChatView::replaceLastMessage(const QString& newMessage, const QString& note) {
    rememberScrolledToBottom();
    replaceLastMessage(newMessage, ChatWindow::KeepTimestamp);
    QWebElement replace = lastElement_.findFirst("span.swift_time");
    assert(!replace.isNull());
    replace.setInnerXml(ChatSnippet::escape(note));
}

QString QtWebKitChatView::getLastSentMessage() {
    return lastElement_.toPlainText();
}

void QtWebKitChatView::addToJSEnvironment(const QString& name, QObject* obj) {
    webView_->page()->currentFrame()->addToJavaScriptWindowObject(name, obj);
}

void QtWebKitChatView::replaceMessage(const QString& newMessage, const QString& id, const QDateTime& editTime) {
    rememberScrolledToBottom();
    QWebElement message = document_.findFirst("#" + id);
    if (!message.isNull()) {
        QWebElement replaceContent = message.findFirst("span.swift_inner_message");
        assert(!replaceContent.isNull());
        QString old = replaceContent.toOuterXml();
        replaceContent.setInnerXml(ChatSnippet::escape(newMessage));
        QWebElement replaceTime = message.findFirst("span.swift_time");
        assert(!replaceTime.isNull());
        old = replaceTime.toOuterXml();
        replaceTime.setInnerXml(ChatSnippet::escape(tr("%1 edited").arg(ChatSnippet::timeToEscapedString(editTime))));
    }
    else {
        qWarning() << "Trying to replace element with id " << id << " but it's not there.";
    }
}

void QtWebKitChatView::showEmoticons(bool show) {
    showEmoticons_ = show;
    {
        const QWebElementCollection spans = document_.findAll("span.swift_emoticon_image");
        Q_FOREACH (QWebElement span, spans) {
            span.setStyleProperty("display", show ? "inline" : "none");
        }
    }
    {
        const QWebElementCollection spans = document_.findAll("span.swift_emoticon_text");
        Q_FOREACH (QWebElement span, spans) {
            span.setStyleProperty("display", show ? "none" : "inline");
        }
    }
}

void QtWebKitChatView::copySelectionToClipboard() {
    if (!webPage_->selectedText().isEmpty()) {
        webPage_->triggerAction(QWebPage::Copy);
    }
}

void QtWebKitChatView::setAckXML(const QString& id, const QString& xml) {
    QWebElement message = document_.findFirst("#" + id);
    /* Deliberately not asserting here, so that when we start expiring old messages it won't hit us */
    if (message.isNull()) return;
    QWebElement ackElement = message.findFirst("span.swift_ack");
    assert(!ackElement.isNull());
    ackElement.setInnerXml(xml);
}

void QtWebKitChatView::setReceiptXML(const QString& id, const QString& xml) {
    QWebElement message = document_.findFirst("#" + id);
    if (message.isNull()) return;
    QWebElement receiptElement = message.findFirst("span.swift_receipt");
    assert(!receiptElement.isNull());
    receiptElement.setInnerXml(xml);
}

void QtWebKitChatView::displayReceiptInfo(const QString& id, bool showIt) {
    QWebElement message = document_.findFirst("#" + id);
    if (message.isNull()) return;
    QWebElement receiptElement = message.findFirst("span.swift_receipt");
    assert(!receiptElement.isNull());
    receiptElement.setStyleProperty("display", showIt ? "inline" : "none");
}

void QtWebKitChatView::rememberScrolledToBottom() {
    if (webPage_) {
        isAtBottom_ = webPage_->mainFrame()->scrollBarValue(Qt::Vertical) >= (webPage_->mainFrame()->scrollBarMaximum(Qt::Vertical) - 1);
    }
}

void QtWebKitChatView::scrollToBottom() {
    isAtBottom_ = true;
    webPage_->mainFrame()->setScrollBarValue(Qt::Vertical, webPage_->mainFrame()->scrollBarMaximum(Qt::Vertical));
    webView_->update(); /* Work around redraw bug in some versions of Qt. */
}

void QtWebKitChatView::handleFrameSizeChanged() {
    if (topMessageAdded_) {
        // adjust new scrollbar position
        int newMaximum = webPage_->mainFrame()->scrollBarMaximum(Qt::Vertical);
        webPage_->mainFrame()->setScrollBarValue(Qt::Vertical, newMaximum - scrollBarMaximum_);
        topMessageAdded_ = false;
    }

    if (isAtBottom_ && !disableAutoScroll_) {
        scrollToBottom();
    }
}

void QtWebKitChatView::handleLinkClicked(const QUrl& url) {
    QDesktopServices::openUrl(url);
}

void QtWebKitChatView::handleViewLoadFinished(bool ok) {
    Q_ASSERT(ok);
    viewReady_ = true;
}

void QtWebKitChatView::increaseFontSize(int numSteps) {
    //qDebug() << "Increasing";
    fontSizeSteps_ += numSteps;
    emit fontResized(fontSizeSteps_);
}

void QtWebKitChatView::decreaseFontSize() {
    fontSizeSteps_--;
    if (fontSizeSteps_ < 0) {
        fontSizeSteps_ = 0;
    }
    emit fontResized(fontSizeSteps_);
}

void QtWebKitChatView::resizeFont(int fontSizeSteps) {
    fontSizeSteps_ = fontSizeSteps;
    double size = minimalFontScaling + 0.2 * fontSizeSteps_;
    QString sizeString(QString().setNum(size, 'g', 3) + "em");

    // Set the font size in the <style id="text-resize-style"> element in the theme <head> element.
    QWebElement resizableTextStyle = document_.findFirst("style#text-resize-style");
    assert(!resizableTextStyle.isNull());
    resizableTextStyle.setInnerXml(QString("span.swift_resizable { font-size: %1;}").arg(sizeString));
    webView_->setFontSizeIsMinimal(size == minimalFontScaling);
}

void QtWebKitChatView::resetView() {
    lastElement_ = QWebElement();
    firstElement_ = lastElement_;
    topMessageAdded_ = false;
    scrollBarMaximum_ = 0;
    QString pageHTML = theme_->getTemplate();
    pageHTML.replace("==bodyBackground==", "background-color:#e3e3e3");
    pageHTML.replace(pageHTML.indexOf("%@"), 2, theme_->getBase());
    if (pageHTML.count("%@") > 3) {
        pageHTML.replace(pageHTML.indexOf("%@"), 2, theme_->getMainCSS());
    }
    pageHTML.replace(pageHTML.indexOf("%@"), 2, "Variants/Blue on Green.css");
    pageHTML.replace(pageHTML.indexOf("%@"), 2, ""/*headerSnippet.getContent()*/);
    pageHTML.replace(pageHTML.indexOf("%@"), 2, ""/*footerSnippet.getContent()*/);
    QEventLoop syncLoop;
    connect(webView_, SIGNAL(loadFinished(bool)), &syncLoop, SLOT(quit()));
    webPage_->mainFrame()->setHtml(pageHTML);
    while (!viewReady_) {
        syncLoop.processEvents(QEventLoop::AllEvents, 50);
    }
    document_ = webPage_->mainFrame()->documentElement();

    scrollToBottom();

    connect(webPage_->mainFrame(), SIGNAL(contentsSizeChanged(const QSize&)), this, SLOT(handleFrameSizeChanged()), Qt::UniqueConnection);

    // Hooking up to scroll bar update, because Qt does not provide a way to retrieve accurate scroll bar updates from C++ directly.
    QWebElement body = document_.findFirst("body");
    assert(!body.isNull());
    body.setAttribute("onscroll", "chatwindow.verticalScrollBarPositionChanged(document.body.scrollTop / (document.body.scrollHeight - window.innerHeight))");

    // Adjust web view default 96 DPI setting to screen DPI.
    // For more information see https://webkit.org/blog/57/css-units/
    webView_->setZoomFactor(QApplication::desktop()->screen()->logicalDpiX() / 96.0);

    body.setStyleProperty("font-size", QString("%1pt").arg(QApplication::font().pointSize()));
}

static QWebElement findElementWithID(QWebElement document, QString elementName, QString id) {
    QWebElementCollection elements = document.findAll(elementName);
    Q_FOREACH(QWebElement element, elements) {
        if (element.attribute("id") == id) {
            return element;
        }
    }
    return QWebElement();
}

void QtWebKitChatView::setFileTransferProgress(QString id, const int percentageDone) {
    rememberScrolledToBottom();
    QWebElement ftElement = findElementWithID(document_, "div", id);
    if (ftElement.isNull()) {
        SWIFT_LOG(debug) << "Tried to access FT UI via invalid id!" << std::endl;
        return;
    }
    QWebElement progressBar = ftElement.findFirst("div.progressbar");
    progressBar.setStyleProperty("width", QString::number(percentageDone) + "%");

    QWebElement progressBarValue = ftElement.findFirst("div.progressbar-value");
    progressBarValue.setInnerXml(QString::number(percentageDone) + " %");
}

void QtWebKitChatView::setFileTransferStatus(QString id, const ChatWindow::FileTransferState state, const QString& /* msg */) {
    rememberScrolledToBottom();
    QWebElement ftElement = findElementWithID(document_, "div", id);
    if (ftElement.isNull()) {
        SWIFT_LOG(debug) << "Tried to access FT UI via invalid id! id = " << Q2PSTRING(id) << std::endl;
        return;
    }

    QString newInnerHTML = "";
    if (state == ChatWindow::Initialisation) {
        QWebElement filenameSizeDescriptionElement = ftElement.parent().firstChild();
        QString description = QtUtilities::htmlEscape(descriptions_[id]);
        if (!description.isEmpty()) {
            filenameSizeDescriptionElement.prependOutside(QString(" \"%1\"").arg(description));
        }
        newInnerHTML = tr("Preparing to transfer.") + "<br/>" +
            buildChatWindowButton(tr("Cancel"), ButtonFileTransferCancel, id);
    }
    else if (state == ChatWindow::WaitingForAccept) {
        newInnerHTML = tr("Waiting for other side to accept the transfer.") + "<br/>" +
            buildChatWindowButton(tr("Cancel"), ButtonFileTransferCancel, id);
    }
    else if (state == ChatWindow::Negotiating) {
        // replace with text "Negotiaging" + Cancel button
        newInnerHTML = tr("Negotiating...") + "<br/>" +
            buildChatWindowButton(tr("Cancel"), ButtonFileTransferCancel, id);
    }
    else if (state == ChatWindow::Transferring) {
        // progress bar + Cancel Button
        newInnerHTML = "<div style=\"position: relative; width: 90%; height: 20px; border: 2px solid grey; -webkit-border-radius: 10px;\">"
                            "<div class=\"progressbar\" style=\"width: 0%; height: 100%; background: #AAA; -webkit-border-radius: 6px;\">"
                                "<div class=\"progressbar-value\" style=\"position: absolute; top: 0px; left: 0px; width: 100%; text-align: center; padding-top: 2px;\">"
                                    "0%"
                                "</div>"
                            "</div>"
                        "</div>" +
                        buildChatWindowButton(tr("Cancel"), ButtonFileTransferCancel, id);
    }
    else if (state == ChatWindow::Canceled) {
        newInnerHTML = tr("Transfer has been canceled!");
    }
    else if (state == ChatWindow::Finished) {
        // text "Successful transfer"
        newInnerHTML = tr("Transfer completed successfully." ) + " " + buildChatWindowButton(tr("Open file"), ButtonFileTransferOpenFile, id, filePaths_[id]);
        filePaths_.erase(id);
    }
    else if (state == ChatWindow::FTFailed) {
        newInnerHTML = tr("Transfer failed.");
    }

    ftElement.setInnerXml(newInnerHTML);
}

void QtWebKitChatView::setWhiteboardSessionStatus(QString id, const ChatWindow::WhiteboardSessionState state) {
    QWebElement divElement = findElementWithID(document_, "div", id);
    QString newInnerHTML;
    if (state == ChatWindow::WhiteboardAccepted) {
        newInnerHTML =    tr("Started whiteboard chat") + "<br/>" + buildChatWindowButton(tr("Show whiteboard"), ButtonWhiteboardShowWindow, id);
    } else if (state == ChatWindow::WhiteboardTerminated) {
        newInnerHTML =    tr("Whiteboard chat has been canceled");
    } else if (state == ChatWindow::WhiteboardRejected) {
        newInnerHTML =    tr("Whiteboard chat request has been rejected");
    }
    divElement.setInnerXml(newInnerHTML);
}

void QtWebKitChatView::setMUCInvitationJoined(QString id) {
    QWebElement divElement = findElementWithID(document_, "div", id);
    QWebElement buttonElement = findElementWithID(divElement, "input", "mucinvite");
    if (!buttonElement.isNull()) {
        buttonElement.setAttribute("value", tr("Return to room"));
    }
}

void QtWebKitChatView::askDesktopToOpenFile(const QString& filename) {
    QFileInfo fileInfo(filename);
    if (fileInfo.exists() && fileInfo.isFile()) {
        QDesktopServices::openUrl(QUrl::fromLocalFile(filename));
    }
}

int QtWebKitChatView::getSnippetPositionByDate(const QDate& date) {
    QWebElement message = webPage_->mainFrame()->documentElement().findFirst(".date" + date.toString(Qt::ISODate));

    return message.geometry().top();
}

void QtWebKitChatView::resetTopInsertPoint() {
    // TODO: Implement or refactor later.
    SWIFT_LOG(error) << "Not yet implemented!" << std::endl;
}

std::string QtWebKitChatView::addMessage(
        const ChatWindow::ChatMessage& message,
        const std::string& senderName,
        bool senderIsSelf,
        std::shared_ptr<SecurityLabel> label,
        const std::string& avatarPath,
        const boost::posix_time::ptime& time) {
    return addMessage(chatMessageToHTML(message), senderName, senderIsSelf, label, avatarPath, "", time, message.getHighlightActionSender(), ChatSnippet::getDirection(message));
}

QString QtWebKitChatView::getHighlightSpanStart(const std::string& text, const std::string& background) {
    QString ecsapeColor;
    QString escapeBackground;
    if (!text.empty()) {
        ecsapeColor = QString("color: %1").arg(QtUtilities::htmlEscape(P2QSTRING(text)));
    }
    if (!background.empty()) {
        escapeBackground = QString("background: %1").arg(QtUtilities::htmlEscape(P2QSTRING(background)));
    }
    return QString("<span style=\"%1; %2;\">").arg(ecsapeColor).arg(escapeBackground);
}

QString QtWebKitChatView::getHighlightSpanStart(const HighlightAction& highlight) {
    return getHighlightSpanStart(highlight.getFrontColor().get_value_or(""), highlight.getBackColor().get_value_or(""));
}

QString QtWebKitChatView::chatMessageToHTML(const ChatWindow::ChatMessage& message) {
    QString result;
    for (const auto& part : message.getParts()) {
        std::shared_ptr<ChatWindow::ChatTextMessagePart> textPart;
        std::shared_ptr<ChatWindow::ChatURIMessagePart> uriPart;
        std::shared_ptr<ChatWindow::ChatEmoticonMessagePart> emoticonPart;
        std::shared_ptr<ChatWindow::ChatHighlightingMessagePart> highlightPart;

        if ((textPart = std::dynamic_pointer_cast<ChatWindow::ChatTextMessagePart>(part))) {
            QString text = QtUtilities::htmlEscape(P2QSTRING(textPart->text));
            text.replace("\n","<br/>");
            result += text;
            continue;
        }
        if ((uriPart = std::dynamic_pointer_cast<ChatWindow::ChatURIMessagePart>(part))) {
            QString uri = QtUtilities::htmlEscape(P2QSTRING(uriPart->target));
            result += "<a href='" + uri + "' >" + uri + "</a>";
            continue;
        }
        if ((emoticonPart = std::dynamic_pointer_cast<ChatWindow::ChatEmoticonMessagePart>(part))) {
            QString textStyle = showEmoticons_ ? "style='display:none'" : "";
            QString imageStyle = showEmoticons_ ? "" : "style='display:none'";
            result += "<span class='swift_emoticon_image' " + imageStyle + "><img src='" + P2QSTRING(emoticonPart->imagePath) + "'/></span><span class='swift_emoticon_text' " + textStyle + ">" + QtUtilities::htmlEscape(P2QSTRING(emoticonPart->alternativeText)) + "</span>";
            continue;
        }
        if ((highlightPart = std::dynamic_pointer_cast<ChatWindow::ChatHighlightingMessagePart>(part))) {
            QString spanStart = getHighlightSpanStart(highlightPart->action.getFrontColor().get_value_or(""), highlightPart->action.getBackColor().get_value_or(""));
            result += spanStart + QtUtilities::htmlEscape(P2QSTRING(highlightPart->text)) + "</span>";
            continue;
        }

    }
    return result;
}

std::string QtWebKitChatView::addMessage(
        const QString& message,
        const std::string& senderName,
        bool senderIsSelf,
        std::shared_ptr<SecurityLabel> label,
        const std::string& avatarPath,
        const QString& style,
        const boost::posix_time::ptime& time,
        const HighlightAction& highlight,
        ChatSnippet::Direction direction) {

    QString scaledAvatarPath = QtScaledAvatarCache(32).getScaledAvatarPath(avatarPath.c_str());

    QString htmlString;
    if (label) {
        htmlString = QString("<span style=\"border: thin dashed grey; padding-left: .5em; padding-right: .5em; color: %1; background-color: %2; font-size: 90%; margin-right: .5em; \" class='swift_label'>").arg(QtUtilities::htmlEscape(P2QSTRING(label->getForegroundColor()))).arg(QtUtilities::htmlEscape(P2QSTRING(label->getBackgroundColor())));
        htmlString += QString("%1</span> ").arg(QtUtilities::htmlEscape(P2QSTRING(label->getDisplayMarking())));
    }

    QString styleSpanStart = style == "" ? "" : "<span style=\"" + style + "\">";
    QString styleSpanEnd = style == "" ? "" : "</span>";

    bool highlightWholeMessage = highlight.getFrontColor() || highlight.getBackColor();
    QString highlightSpanStart = highlightWholeMessage ? getHighlightSpanStart(highlight) : "";
    QString highlightSpanEnd = highlightWholeMessage ? "</span>" : "";
    htmlString += "<span class='swift_inner_message'>" + styleSpanStart + highlightSpanStart + message + highlightSpanEnd + styleSpanEnd + "</span>" ;

    bool appendToPrevious = appendToPreviousCheck(PreviousMessageWasMessage, senderName, senderIsSelf);

    QString qAvatarPath = scaledAvatarPath.isEmpty() ? "qrc:/icons/avatar.svg" : QUrl::fromLocalFile(scaledAvatarPath).toEncoded();
    std::string id = "id" + boost::lexical_cast<std::string>(idCounter_++);
    addMessageBottom(std::make_shared<MessageSnippet>(htmlString, QtUtilities::htmlEscape(P2QSTRING(senderName)), B2QDATE(time), qAvatarPath, senderIsSelf, appendToPrevious, theme_, P2QSTRING(id), direction));

    previousMessageWasSelf_ = senderIsSelf;
    previousSenderName_ = P2QSTRING(senderName);
    previousMessageKind_ = PreviousMessageWasMessage;
    return id;
}

std::string QtWebKitChatView::addAction(const ChatWindow::ChatMessage& message, const std::string &senderName, bool senderIsSelf, std::shared_ptr<SecurityLabel> label, const std::string& avatarPath, const boost::posix_time::ptime& time) {
    return addMessage(" *" + chatMessageToHTML(message) + "*", senderName, senderIsSelf, label, avatarPath, "font-style:italic ", time, message.getHighlightActionSender(), ChatSnippet::getDirection(message));
}

static QString encodeButtonArgument(const QString& str) {
    return QtUtilities::htmlEscape(P2QSTRING(Base64::encode(createByteArray(Q2PSTRING(str)))));
}

static QString decodeButtonArgument(const QString& str) {
    return P2QSTRING(byteArrayToString(Base64::decode(Q2PSTRING(str))));
}

QString QtWebKitChatView::buildChatWindowButton(const QString& name, const QString& id, const QString& arg1, const QString& arg2, const QString& arg3, const QString& arg4, const QString& arg5) {
    QRegExp regex("[A-Za-z][A-Za-z0-9\\-\\_]+");
    Q_ASSERT(regex.exactMatch(id));
    QString html = QString("<input id='%2' type='submit' value='%1' onclick='chatwindow.buttonClicked(\"%2\", \"%3\", \"%4\", \"%5\", \"%6\", \"%7\");' />").arg(name).arg(id).arg(encodeButtonArgument(arg1)).arg(encodeButtonArgument(arg2)).arg(encodeButtonArgument(arg3)).arg(encodeButtonArgument(arg4)).arg(encodeButtonArgument(arg5));
    return html;
}

void QtWebKitChatView::resizeEvent(QResizeEvent* event) {
    // This code ensures that if the user is scrolled all to the bottom of a chat view,
    // the view stays scrolled to the bottom if the view is resized or if the message
    // input widget becomes multi line.
    if (isAtBottom_) {
        scrollToBottom();
    }
    QWidget::resizeEvent(event);
}

std::string QtWebKitChatView::addFileTransfer(const std::string& senderName, const std::string& avatarPath, bool senderIsSelf, const std::string& filename, const boost::uintmax_t sizeInBytes, const std::string& description) {
    SWIFT_LOG(debug) << "addFileTransfer" << std::endl;
    QString ft_id = QString("ft%1").arg(P2QSTRING(boost::lexical_cast<std::string>(idCounter_++)));

    QString actionText;
    QString htmlString;
    QString formattedFileSize = P2QSTRING(formatSize(sizeInBytes));
    QString sanitizedFileName = QtUtilities::htmlEscape(P2QSTRING(filename));
    QString sanitizedDescription = QtUtilities::htmlEscape(P2QSTRING(description));
    if (senderIsSelf) {
        // outgoing
        filePaths_[ft_id] = sanitizedFileName;
        actionText = tr("Send file: %1 (%2)").arg(sanitizedFileName).arg(formattedFileSize);
        htmlString = actionText + " <br/>" +
            "<div id='" + ft_id + "'>" +
                buildChatWindowButton(tr("Cancel"), ButtonFileTransferCancel, ft_id) +
                buildChatWindowButton(tr("Set Description"), ButtonFileTransferSetDescription, ft_id) +
                buildChatWindowButton(tr("Send"), ButtonFileTransferSendRequest, ft_id) +
            "</div>";
    } else {
        // incoming
        actionText = tr("Receiving file: %1 (%2)").arg(sanitizedFileName).arg(formattedFileSize);
        if (!sanitizedDescription.isEmpty()) {
            actionText += QString(" \"%1\"").arg(sanitizedDescription);
        }
        htmlString = actionText + " <br/>" +
            "<div id='" + ft_id + "'>" +
                buildChatWindowButton(tr("Cancel"), ButtonFileTransferCancel, ft_id) +
                buildChatWindowButton(tr("Accept"), ButtonFileTransferAcceptRequest, ft_id, P2QSTRING(filename)) +
            "</div>";
    }

    bool appendToPrevious = appendToPreviousCheck(PreviousMessageWasFileTransfer, senderName, senderIsSelf);
    QString scaledAvatarPath = QtScaledAvatarCache(32).getScaledAvatarPath(avatarPath.c_str());
    QString qAvatarPath = scaledAvatarPath.isEmpty() ? "qrc:/icons/avatar.svg" : QUrl::fromLocalFile(scaledAvatarPath).toEncoded();
    std::string id = "ftmessage" + boost::lexical_cast<std::string>(idCounter_++);
    addMessageBottom(std::make_shared<MessageSnippet>(htmlString, QtUtilities::htmlEscape(P2QSTRING(senderName)), B2QDATE(boost::posix_time::second_clock::universal_time()), qAvatarPath, senderIsSelf, appendToPrevious, theme_, P2QSTRING(id), ChatSnippet::getDirection(actionText)));

    previousMessageWasSelf_ = senderIsSelf;
    previousSenderName_ = P2QSTRING(senderName);
    previousMessageKind_ = PreviousMessageWasFileTransfer;
    return Q2PSTRING(ft_id);
}

void QtWebKitChatView::setFileTransferProgress(std::string id, const int percentageDone) {
    setFileTransferProgress(P2QSTRING(id), percentageDone);
}

void QtWebKitChatView::setFileTransferStatus(std::string id, const ChatWindow::FileTransferState state, const std::string& msg) {
    setFileTransferStatus(P2QSTRING(id), state, P2QSTRING(msg));
}

std::string QtWebKitChatView::addWhiteboardRequest(const QString& contact, bool senderIsSelf) {
    QString wb_id = QString("wb%1").arg(P2QSTRING(boost::lexical_cast<std::string>(idCounter_++)));
    QString htmlString;
    QString actionText;
    if (senderIsSelf) {
        actionText = tr("Starting whiteboard chat");
        htmlString = "<div id='" + wb_id + "'>" + actionText + "<br />"+
                buildChatWindowButton(tr("Cancel"), ButtonWhiteboardSessionCancel, wb_id) +
            "</div>";
    } else {
        actionText = tr("%1 would like to start a whiteboard chat");
        htmlString = "<div id='" + wb_id + "'>" + actionText.arg(QtUtilities::htmlEscape(contact)) + ": <br/>" +
                buildChatWindowButton(tr("Cancel"), ButtonWhiteboardSessionCancel, wb_id) +
                buildChatWindowButton(tr("Accept"), ButtonWhiteboardSessionAcceptRequest, wb_id) +
            "</div>";
    }
    QString qAvatarPath = "qrc:/icons/avatar.svg";
    std::string id = "wbmessage" + boost::lexical_cast<std::string>(idCounter_++);
    addMessageBottom(std::make_shared<MessageSnippet>(htmlString, QtUtilities::htmlEscape(contact), B2QDATE(boost::posix_time::second_clock::universal_time()), qAvatarPath, false, false, theme_, P2QSTRING(id), ChatSnippet::getDirection(actionText)));
    previousMessageWasSelf_ = false;
    previousSenderName_ = contact;
    return Q2PSTRING(wb_id);
}

void QtWebKitChatView::setWhiteboardSessionStatus(const std::string& id, const ChatWindow::WhiteboardSessionState state) {
    setWhiteboardSessionStatus(P2QSTRING(id), state);
}

static bool isFilePathWritable(const QString& path) {
    QFileInfo fileInfo = QFileInfo(path);
    if (fileInfo.exists()) {
        return fileInfo.isWritable();
    }
    else {
        bool writable = false;
        QFile writeTestFile(path);
        if (writeTestFile.open(QIODevice::ReadWrite)) {
            writeTestFile.write("test");
            if (writeTestFile.error() == QFileDevice::NoError) {
                writable = true;
            }
        }
        writeTestFile.close();
        writeTestFile.remove();
        return writable;
    }
}

void QtWebKitChatView::setFileTransferWarning(QString id, QString warningText) {
    QWebElement ftElement = findElementWithID(document_, "div", id);
    if (ftElement.isNull()) {
        SWIFT_LOG(debug) << "Tried to access FT UI via invalid id! id = " << Q2PSTRING(id) << std::endl;
        return;
    }

    removeFileTransferWarning(id);
    ftElement.appendInside(QString("<div class='ft_warning' style='color: red;'><br/>%1</div>").arg(QtUtilities::htmlEscape(warningText)));
}

void QtWebKitChatView::removeFileTransferWarning(QString id) {
    QWebElement ftElement = findElementWithID(document_, "div", id);
    if (ftElement.isNull()) {
        SWIFT_LOG(debug) << "Tried to access FT UI via invalid id! id = " << Q2PSTRING(id) << std::endl;
        return;
    }

    QWebElement warningElement = ftElement.findFirst(".ft_warning");
    if (!warningElement.isNull()) {
        warningElement.removeFromDocument();
    }
}

void QtWebKitChatView::handleHTMLButtonClicked(QString id, QString encodedArgument1, QString encodedArgument2, QString encodedArgument3, QString encodedArgument4, QString encodedArgument5) {
    QString arg1 = decodeButtonArgument(encodedArgument1);
    QString arg2 = decodeButtonArgument(encodedArgument2);
    QString arg3 = decodeButtonArgument(encodedArgument3);
    QString arg4 = decodeButtonArgument(encodedArgument4);
    QString arg5 = decodeButtonArgument(encodedArgument5);

    if (id.startsWith(ButtonFileTransferCancel)) {
        QString ft_id = arg1;
        window_->onFileTransferCancel(Q2PSTRING(ft_id));
    }
    else if (id.startsWith(ButtonFileTransferSetDescription)) {
        QString ft_id = arg1;
        bool ok = false;
        QString text = QInputDialog::getText(this, tr("File transfer description"),
            tr("Description:"), QLineEdit::Normal, "", &ok);
        if (ok) {
            descriptions_[ft_id] = text;
        }
    }
    else if (id.startsWith(ButtonFileTransferSendRequest)) {
        QString ft_id = arg1;
        QString text = descriptions_.find(ft_id) == descriptions_.end() ? QString() : descriptions_[ft_id];
        window_->onFileTransferStart(Q2PSTRING(ft_id), Q2PSTRING(text));
    }
    else if (id.startsWith(ButtonFileTransferAcceptRequest)) {
        QString ft_id = arg1;
        QString filename = arg2;

        QString path = QFileDialog::getSaveFileName(this, tr("Save File"), filename);
        if (!path.isEmpty() && isFilePathWritable(path)) {
            filePaths_[ft_id] = path;
            window_->onFileTransferAccept(Q2PSTRING(ft_id), Q2PSTRING(path));
            removeFileTransferWarning(ft_id);
        }
        else {
            setFileTransferWarning(ft_id, tr("The chosen save location is not writable! Click the 'Accept' button to select a different save location."));
        }
    }
    else if (id.startsWith(ButtonFileTransferOpenFile)) {
        QString ft_id = arg1;
        QString filename = arg2;
        askDesktopToOpenFile(filename);
    }
    else if (id.startsWith(ButtonWhiteboardSessionAcceptRequest)) {
        QString id = arg1;
        setWhiteboardSessionStatus(id, ChatWindow::WhiteboardAccepted);
        window_->onWhiteboardSessionAccept();
    }
    else if (id.startsWith(ButtonWhiteboardSessionCancel)) {
        QString id = arg1;
        setWhiteboardSessionStatus(id, ChatWindow::WhiteboardTerminated);
        window_->onWhiteboardSessionCancel();
    }
    else if (id.startsWith(ButtonWhiteboardShowWindow)) {
        QString id = arg1;
        window_->onWhiteboardWindowShow();
    }
    else if (id.startsWith(ButtonMUCInvite)) {
        QString roomJID = arg1;
        QString password = arg2;
        QString elementID = arg3;
        QString isImpromptu = arg4;
        QString isContinuation = arg5;
        eventStream_->send(std::make_shared<JoinMUCUIEvent>(Q2PSTRING(roomJID), Q2PSTRING(password), boost::optional<std::string>(), false, false, isImpromptu.contains("true"), isContinuation.contains("true")));
        setMUCInvitationJoined(elementID);
    }
    else {
        SWIFT_LOG(debug) << "Unknown HTML button! ( " << Q2PSTRING(id) << " )" << std::endl;
    }
}

void QtWebKitChatView::handleVerticalScrollBarPositionChanged(double position) {
    rememberScrolledToBottom();
    if (position == 0) {
        emit scrollReachedTop();
    }
    else if (position == 1) {
        emit scrollReachedBottom();
    }
}

void QtWebKitChatView::addErrorMessage(const ChatWindow::ChatMessage& errorMessage) {
    if (window_->isWidgetSelected()) {
        window_->onAllMessagesRead();
    }

    QString errorMessageHTML(chatMessageToHTML(errorMessage));
    std::string id = "id" + boost::lexical_cast<std::string>(idCounter_++);
    addMessageBottom(std::make_shared<SystemMessageSnippet>("<span class=\"error\">" + errorMessageHTML + "</span>", QDateTime::currentDateTime(), false, theme_, P2QSTRING(id), ChatSnippet::getDirection(errorMessage)));

    previousMessageWasSelf_ = false;
    previousMessageKind_ = PreviousMessageWasSystem;
}

std::string QtWebKitChatView::addSystemMessage(const ChatWindow::ChatMessage& message, ChatWindow::Direction direction) {
    if (window_->isWidgetSelected()) {
        window_->onAllMessagesRead();
    }

    QString messageHTML = chatMessageToHTML(message);
    std::string id = "id" + boost::lexical_cast<std::string>(idCounter_++);
    addMessageBottom(std::make_shared<SystemMessageSnippet>(messageHTML, QDateTime::currentDateTime(), false, theme_, P2QSTRING(id), getActualDirection(message, direction)));

    previousMessageKind_ = PreviousMessageWasSystem;
    return id;
}

void QtWebKitChatView::replaceWithAction(const ChatWindow::ChatMessage& message, const std::string& id, const boost::posix_time::ptime& time) {
    replaceMessage(" *" + chatMessageToHTML(message) + "*", id, time, "font-style:italic ", message.getHighlightActionSender());
}

void QtWebKitChatView::replaceMessage(const ChatWindow::ChatMessage& message, const std::string& id, const boost::posix_time::ptime& time) {
    replaceMessage(chatMessageToHTML(message), id, time, "", message.getHighlightActionSender());
}

void QtWebKitChatView::replaceSystemMessage(const ChatWindow::ChatMessage& message, const std::string& id, ChatWindow::TimestampBehaviour timestampBehavior) {
    replaceSystemMessage(chatMessageToHTML(message), P2QSTRING(id), timestampBehavior);
}

void QtWebKitChatView::replaceSystemMessage(const QString& newMessage, const QString& id, const ChatWindow::TimestampBehaviour timestampBehaviour) {
    rememberScrolledToBottom();
    QWebElement message = document_.findFirst("#" + id);
    if (!message.isNull()) {
        QWebElement replaceContent = message.findFirst("span.swift_message");
        assert(!replaceContent.isNull());
        QString old = replaceContent.toOuterXml();
        replaceContent.setInnerXml(ChatSnippet::escape(newMessage));

        if (timestampBehaviour == ChatWindow::UpdateTimestamp) {
            QWebElement replace = message.findFirst("span.swift_time");
            assert(!replace.isNull());
            replace.setInnerXml(ChatSnippet::timeToEscapedString(QDateTime::currentDateTime()));
        }
    }
    else {
        qWarning() << "Trying to replace element with id " << id << " but it's not there.";
    }
}

void QtWebKitChatView::replaceMessage(const QString& message, const std::string& id, const boost::posix_time::ptime& time, const QString& style, const HighlightAction& highlight) {
    if (!id.empty()) {
        if (window_->isWidgetSelected()) {
            window_->onAllMessagesRead();
        }

        QString messageHTML(message);

        QString styleSpanStart = style == "" ? "" : "<span style=\"" + style + "\">";
        QString styleSpanEnd = style == "" ? "" : "</span>";
        QString highlightSpanStart = (highlight.getFrontColor() || highlight.getBackColor()) ? getHighlightSpanStart(highlight) : "";
        QString highlightSpanEnd = (highlight.getFrontColor() || highlight.getBackColor()) ? "</span>" : "";
        messageHTML = styleSpanStart + highlightSpanStart + messageHTML + highlightSpanEnd + styleSpanEnd;

        replaceMessage(messageHTML, P2QSTRING(id), B2QDATE(time));
    }
    else {
        std::cerr << "Trying to replace a message with no id";
    }
}

void QtWebKitChatView::addPresenceMessage(const ChatWindow::ChatMessage& message, ChatWindow::Direction direction) {
    if (window_->isWidgetSelected()) {
        window_->onAllMessagesRead();
    }

    QString messageHTML = chatMessageToHTML(message);
    std::string id = "id" + boost::lexical_cast<std::string>(idCounter_++);
    addMessageBottom(std::make_shared<SystemMessageSnippet>(messageHTML, QDateTime::currentDateTime(), false, theme_, P2QSTRING(id), getActualDirection(message, direction)));

    previousMessageKind_ = PreviousMessageWasPresence;
}

void QtWebKitChatView::replaceLastMessage(const ChatWindow::ChatMessage& message, const ChatWindow::TimestampBehaviour timestampBehaviour) {
    replaceLastMessage(chatMessageToHTML(message), timestampBehaviour);
}

void QtWebKitChatView::addMUCInvitation(const std::string& senderName, const JID& jid, const std::string& reason, const std::string& password, bool direct, bool isImpromptu, bool isContinuation) {
    if (window_->isWidgetSelected()) {
        window_->onAllMessagesRead();
    }

    QString message;
    if (isImpromptu) {
        message = QObject::tr("You've been invited to join a chat.") + "\n";
    } else {
        message = QObject::tr("You've been invited to enter the %1 room.").arg(P2QSTRING(jid.toString())) + "\n";
    }
    QString htmlString = message;
    if (!reason.empty()) {
        htmlString += QObject::tr("Reason: %1").arg(P2QSTRING(reason)) + "\n";
    }
    if (!direct) {
        htmlString += QObject::tr("This person may not have really sent this invitation!") + "\n";
    }
    htmlString = chatMessageToHTML(ChatWindow::ChatMessage(Q2PSTRING(htmlString)));


    QString id = QString(ButtonMUCInvite + "%1").arg(P2QSTRING(boost::lexical_cast<std::string>(idCounter_++)));
    htmlString += "<div id='" + id + "'>" +
            buildChatWindowButton(chatMessageToHTML(ChatWindow::ChatMessage(Q2PSTRING((tr("Accept Invite"))))), ButtonMUCInvite, QtUtilities::htmlEscape(P2QSTRING(jid.toString())), QtUtilities::htmlEscape(P2QSTRING(password)), id, QtUtilities::htmlEscape(isImpromptu ? "true" : "false"), QtUtilities::htmlEscape(isContinuation ? "true" : "false")) +
        "</div>";

    bool appendToPrevious = appendToPreviousCheck(PreviousMessageWasMUCInvite, senderName, false);

    QString qAvatarPath = "qrc:/icons/avatar.svg";

    addMessageBottom(std::make_shared<MessageSnippet>(htmlString, QtUtilities::htmlEscape(P2QSTRING(senderName)), B2QDATE(boost::posix_time::second_clock::universal_time()), qAvatarPath, false, appendToPrevious, theme_, id, ChatSnippet::getDirection(message)));
    previousMessageWasSelf_ = false;
    previousSenderName_ = P2QSTRING(senderName);
    previousMessageKind_ = PreviousMessageWasMUCInvite;
}

void QtWebKitChatView::setAckState(std::string const& id, ChatWindow::AckState state) {
    QString xml;
    switch (state) {
        case ChatWindow::Pending:
            xml = "<img src='qrc:/icons/throbber.gif' title='" + tr("This message has not been received by your server yet.") + "'/>";
            displayReceiptInfo(P2QSTRING(id), false);
            break;
        case ChatWindow::Received:
            xml = "";
            displayReceiptInfo(P2QSTRING(id), true);
            break;
        case ChatWindow::Failed: xml = "<img src='qrc:/icons/error.png' title='" + tr("This message may not have been transmitted.") + "'/>"; break;
    }
    setAckXML(P2QSTRING(id), xml);
}

void QtWebKitChatView::setMessageReceiptState(const std::string& id, ChatWindow::ReceiptState state) {
    QString xml;
    switch (state) {
        case ChatWindow::ReceiptReceived:
            xml = "<img src='qrc:/icons/delivery-success.svg' title='" + tr("The receipt for this message has been received.") + "'/>";
            break;
        case ChatWindow::ReceiptRequested:
            xml = "<img src='qrc:/icons/delivery-warning.svg' title='" + tr("The receipt for this message has not yet been received. The recipient(s) might not have received this message.") + "'/>";
            break;
        case ChatWindow::ReceiptFailed:
            xml = "<img src='qrc:/icons/delivery-failure.svg' title='" + tr("Failed to transmit message to the receipient(s).") + "'/>";
    }
    setReceiptXML(P2QSTRING(id), xml);
}

bool QtWebKitChatView::appendToPreviousCheck(PreviousMessageKind messageKind, const std::string& senderName, bool senderIsSelf) {
    bool result = previousMessageKind_ == messageKind && ((senderIsSelf && previousMessageWasSelf_) || (!senderIsSelf && !previousMessageWasSelf_&& previousSenderName_ == P2QSTRING(senderName)));
    if (insertingLastLine_) {
        insertingLastLine_ = false;
        return false;
    }
    return result;
}

ChatSnippet::Direction QtWebKitChatView::getActualDirection(const ChatWindow::ChatMessage& message, ChatWindow::Direction direction) {
    if (direction == ChatWindow::DefaultDirection) {
        return QCoreApplication::translate("QApplication", "QT_LAYOUT_DIRECTION") == "RTL" ? ChatSnippet::RTL : ChatSnippet::LTR;
    }
    else {
        return ChatSnippet::getDirection(message);
    }
}

}