-
Notifications
You must be signed in to change notification settings - Fork 28
/
WebViewEdit.cpp
830 lines (701 loc) · 27.1 KB
/
WebViewEdit.cpp
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
/************************************************************************
**
** Copyright (C) 2019-2024 Kevin B. Hendricks, Stratford Ontario Canada
**
** This file is part of PageEdit.
**
** PageEdit is free software: you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation, either version 3 of the License, or
** (at your option) any later version.
**
** PageEdit is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with PageEdit. If not, see <http://www.gnu.org/licenses/>.
**
*************************************************************************/
#include <QEvent>
#include <QEventLoop>
#include <QDeadlineTimer>
#include <QTimer>
#include <QSize>
#include <QUrl>
#include <QDir>
#include <QMenu>
#include <QContextMenuEvent>
#include <QtWebEngineWidgets>
#include <QtWebEngineCore>
#include <QWebEngineSettings>
#include <QWebEngineProfile>
#include <QWebEnginePage>
#include <QWebEngineView>
#include <QWebEngineScript>
#include <QWebEngineContextMenuRequest>
#include <QDebug>
#include "Utility.h"
#include "SettingsStore.h"
#include "WebProfileMgr.h"
#include "UIDictionary.h"
#include "WebPageEdit.h"
#include "WebViewEdit.h"
#define DBG if(0)
const QString SET_CURSOR_JS2 =
"var range = document.createRange();"
"range.setStart(element, 0);"
"range.setEnd(element, 0);"
"var selection = window.getSelection();"
"selection.removeAllRanges();"
"selection.addRange(range);";
const QStringList ANCHOR_TAGS = QStringList() << "a";
struct JSResult {
QVariant res;
bool finished;
JSResult() : res(QVariant("")), finished(false) {}
JSResult(JSResult * pRes) : res(pRes->res), finished(pRes->finished) {}
~JSResult() { }
bool isFinished() { return finished; }
};
struct SetJavascriptResultFunctor {
JSResult * pres;
SetJavascriptResultFunctor(JSResult * pres) : pres(pres) {}
void operator()(const QVariant &result) {
pres->res.setValue(result);
pres->finished = true;
DBG qDebug() << "javascript done";
}
};
struct HTMLResult {
QString res;
bool finished;
HTMLResult() : res(QString("")), finished(false) {}
HTMLResult(HTMLResult * pRes) : res(pRes->res), finished(pRes->finished) {}
bool isFinished() { return finished; }
};
struct SetToHTMLResultFunctor {
HTMLResult * pres;
SetToHTMLResultFunctor(HTMLResult * pres) : pres(pres) {}
void operator()(const QString &result) {
pres->res = result;
pres->finished = true;
}
};
WebViewEdit::WebViewEdit(QWidget *parent)
: QWebEngineView(parent),
c_jQuery(Utility::ReadUnicodeTextFile(":/javascript/jquery-3.6.4.min.js")),
c_jQueryScrollTo(Utility::ReadUnicodeTextFile(":/javascript/jquery.scrollTo-2.1.2-min.js")),
c_GetCaretLocation(Utility::ReadUnicodeTextFile(":/javascript/book_view_current_location.js")),
c_GetBlock(Utility::ReadUnicodeTextFile(":/javascript/get_block.js")),
c_FormatBlock(Utility::ReadUnicodeTextFile(":/javascript/format_block.js")),
c_GetAncestor(Utility::ReadUnicodeTextFile(":/javascript/get_ancestor.js")),
c_GetAncestorAttribute(Utility::ReadUnicodeTextFile(":/javascript/get_ancestor_attribute.js")),
c_SetAncestorAttribute(Utility::ReadUnicodeTextFile(":/javascript/set_ancestor_attribute.js")),
m_CaretLocationUpdate(QString()),
m_CustomSetDocumentInProgress(false),
m_pendingScrollToFragment(QString()),
m_isLoadFinished(false),
m_LoadOkay(false),
m_menu(new QMenu(this))
{
QWebEngineProfile* profile = WebProfileMgr::instance()->GetPreviewProfile();
m_ViewWebPage = new WebPageEdit(profile, this);
setPage(m_ViewWebPage);
// Set the Zoom factor but be sure no signals are set because of this.
SettingsStore settings;
SetCurrentZoomFactor(settings.zoomPreview());
m_dictionaries = UIDictionary::GetUIDictionaries();
ConnectSignalsToSlots();
}
WebViewEdit::~WebViewEdit()
{
if (m_ViewWebPage != NULL) {
delete m_ViewWebPage;
m_ViewWebPage = 0;
}
}
void WebViewEdit::contextMenuEvent(QContextMenuEvent *event)
{
const QWebEngineContextMenuRequest* request = lastContextMenuRequest();
QWebEngineProfile *profile = page()->profile();
m_menu->clear();
if (request->isContentEditable()) {
// Used for edit mode
const QStringList &dictionaries = profile->spellCheckLanguages();
if (!request->misspelledWord().isEmpty()) {
QFont boldFont = m_menu->font();
boldFont.setBold(true);
for (const QString &suggestion : request->spellCheckerSuggestions()) {
QAction *action = m_menu->addAction(suggestion);
action->setFont(boldFont);
connect(action, &QAction::triggered, this, [=]() {
page()->replaceMisspelledWord(suggestion);
});
}
if (m_menu->actions().isEmpty()) {
m_menu->addAction(tr("No suggestions"))->setEnabled(false);
}
}
m_menu->addSeparator();
m_menu->addAction(pageAction(QWebEnginePage::Cut));
m_menu->addAction(pageAction(QWebEnginePage::Copy));
m_menu->addAction(pageAction(QWebEnginePage::Paste));
m_menu->addAction(pageAction(QWebEnginePage::SelectAll));
m_menu->addSeparator();
QAction *spellcheckAction = new QAction(tr("Check Spelling"), nullptr);
spellcheckAction->setCheckable(true);
spellcheckAction->setChecked(profile->isSpellCheckEnabled());
connect(spellcheckAction, &QAction::toggled, this, [profile](bool toogled) {
profile->setSpellCheckEnabled(toogled);
});
m_menu->addAction(spellcheckAction);
if (profile->isSpellCheckEnabled()) {
QMenu *subMenu = m_menu->addMenu(tr("Select Language"));
for (const QString &dict : m_dictionaries) {
QAction *action = subMenu->addAction(dict);
action->setCheckable(true);
action->setChecked(dictionaries.contains(dict));
connect(action, &QAction::triggered, this, [profile, dict](){
profile->setSpellCheckLanguages(QStringList()<<dict);
});
}
}
} else {
// Used for preview mode
m_menu->addAction(pageAction(QWebEnginePage::Copy));
m_menu->addAction(pageAction(QWebEnginePage::SelectAll));
}
// connect(m_menu, &QMenu::aboutToHide, m_menu, &QObject::deleteLater);
m_menu->popup(event->globalPos());
}
void WebViewEdit::LinkHovered(const QString &url)
{
DBG qDebug() << "linkHovered received " << url;;
m_hoverUrl = url;
}
QString WebViewEdit::GetHoverUrl()
{
return m_hoverUrl;
}
QString WebViewEdit::GetCaretElementName()
{
QString javascript = "var node = document.getSelection().anchorNode;"
"var startNode = get_block( node );"
"if (startNode != null) { startNode.nodeName; }";
return EvaluateJavascript(c_GetBlock + javascript).toString();
}
QString WebViewEdit::GetCaretLocationUpdate()
{
StoreCaretLocationUpdate(GetCaretLocation());
return m_CaretLocationUpdate;
}
QSize WebViewEdit::sizeHint() const
{
return QSize(16777215, 16777215);
}
void WebViewEdit::CustomSetDocument(const QString &path, const QString &html)
{
if (html.isEmpty()) {
return;
}
m_CustomSetDocumentInProgress = true;
// If this is not the very first load of this document, store the caret location
if (!url().isEmpty()) {
// This next line really causes problems as it happens to interfere with later loading
// StoreCurrentCaretLocation();
// keep memory footprint small clear any caches when a new page loads
if (url().toLocalFile() != path) {
page()->profile()->clearHttpCache();
}
}
m_isLoadFinished = false;
// If Tidy is turned off, then PageEdit will explode if there is no xmlns
// on the <html> element. So we will silently add it if needed to ensure
// no errors occur, to allow loading of documents created outside of
// PageEdit as well as catering for section splits etc.
QString replaced_html = html;
replaced_html = replaced_html.replace("<html>", "<html xmlns=\"http://www.w3.org/1999/xhtml\">");
setContent(replaced_html.toUtf8(), "application/xhtml+xml;charset=UTF-8", QUrl::fromLocalFile(path));
}
bool WebViewEdit::IsLoadingFinished()
{
return m_isLoadFinished;
}
void WebViewEdit::SetZoomFactor(float factor)
{
SettingsStore settings;
settings.setZoomPreview(factor);
SetCurrentZoomFactor(factor);
Zoom();
emit ZoomFactorChanged(factor);
}
void WebViewEdit::SetCurrentZoomFactor(float factor)
{
m_CurrentZoomFactor = factor;
}
float WebViewEdit::GetZoomFactor() const
{
return m_CurrentZoomFactor;
}
void WebViewEdit::Zoom()
{
setZoomFactor(m_CurrentZoomFactor);
}
void WebViewEdit::UpdateDisplay()
{
SettingsStore settings;
float stored_factor = settings.zoomWeb();
if (stored_factor != m_CurrentZoomFactor) {
m_CurrentZoomFactor = stored_factor;
Zoom();
}
}
void WebViewEdit::ScrollToTop()
{
QString caret_location = "var elementList = document.getElementsByTagName(\"body\");"
"var element = elementList[0];";
QString scroll = "var from_top = window.innerHeight / 2;"
"if (typeof element !== 'undefined') {"
" $.scrollTo(element, 0, {offset: {top:-from_top, left:0} });";
QString script = caret_location + scroll + SET_CURSOR_JS2 + "}";
DoJavascript(script);
}
void WebViewEdit::ScrollToFragment(const QString &fragment)
{
if (IsLoadingFinished()) {
ScrollToFragmentInternal(fragment);
} else {
m_pendingScrollToFragment = fragment;
}
}
void WebViewEdit::ScrollToFragmentInternal(const QString &fragment)
{
if (fragment.isEmpty()) {
ScrollToTop();
return;
}
QString caret_location = "var element = document.getElementById(\"" + fragment + "\");";
QString scroll = "var from_top = window.innerHeight / 2.5;"
"if (typeof element !== 'undefined') {"
"$.scrollTo(element, 0, {offset: {top:-from_top, left:0 } });";
QString script = caret_location + scroll + SET_CURSOR_JS2 + "}";
DoJavascript(script);
}
void WebViewEdit::SelectPreviousChar()
{
QString script = "var selection = window.getSelection();"
"selection.modify('extend', 'backward', 'character');";
DoJavascript(script);
}
void WebViewEdit::LoadingStarted()
{
DBG qDebug() << "Loading a page started";
m_isLoadFinished = false;
m_LoadOkay = false;
}
void WebViewEdit::LoadingProgress(int progress)
{
DBG qDebug() << "Loading progress " << progress;
// this hack was needed before QtWebEngine from Qt 5.15.5
// as internal link loads generated no finished signal
// if ((progress >= 100) && !m_CustomSetDocumentInProgress) {
// m_isLoadFinished = true;
// m_LoadOkay = true;
// }
}
void WebViewEdit::UpdateFinishedState(bool okay)
{
// Qt 5.12.2 returns loadFinished with okay set to false when caused by
// clicking a link that acceptNavigationRequest denies
// even when there are no apparent errors!
DBG qDebug() << "UpdateFinishedState with okay " << okay;
// Wait until after jQuery load to set this
// m_isLoadFinished = true;
m_LoadOkay = okay;
emit DocumentLoaded();
}
QString WebViewEdit::GetHtml() const
{
HTMLResult * pres = new HTMLResult();
page()->toHtml(SetToHTMLResultFunctor(pres));
while(!pres->isFinished()) {
qApp->processEvents(QEventLoop::ExcludeUserInputEvents | QEventLoop::ExcludeSocketNotifiers, 100);
}
QString res = pres->res;
delete pres;
return res;
}
QString WebViewEdit::GetSelectedText()
{
QString javascript = "window.getSelection().toString();";
QString text = EvaluateJavascript(javascript).toString();
text = Utility::UseNFC(text);
return text;
}
void WebViewEdit::ApplyCaseChangeToSelection(const Utility::Casing &casing)
{
// Users can actually select too much here including tags
// Pasting over the tags then loses content (such as anchor links)
// So we detect if the user selected more than just text, and if so
// simply return
// javascript to get html of window selection
QString javascript = "var xml = '';"
"if (window.getSelection) {"
" var selection = window.getSelection();"
" if (selection.rangeCount > 0) {"
" var range = selection.getRangeAt(0);"
" var clonedSelection = range.cloneContents();"
" var div = document.createElement('div');"
" div.appendChild(clonedSelection);"
" xml = div.innerHTML;"
" }"
"}"
"xml;";
QString selected_html = EvaluateJavascript(javascript).toString();
QString selected_text = GetSelectedText();
// if you selected more than just text simply return
if (selected_text != selected_html) {
return;
}
QString new_text = Utility::ChangeCase(selected_text, casing);
// if nothing changed, simply return
if (new_text == selected_text) {
return;
}
// QApplication::clipboard()->setText(new_text);
// triggerPageAction(QWebEnginePage::Paste);
InsertHtml(new_text);
// We will have lost our selection from the paste operation.
for (int i = 0; i < new_text.length(); i++) {
SelectPreviousChar();
}
return;
}
void WebViewEdit::PasteText(const QString &text)
{
InsertHtml(text);
}
bool WebViewEdit::InsertHtml(const QString &html)
{
QString newhtml = Utility::UseNFC(html);
return ExecCommand("insertHTML", newhtml);
}
bool WebViewEdit::InsertId(const QString &id)
{
const QString &element_name = "a";
const QString &attribute_name = "id";
return InsertTagAttribute(element_name, attribute_name, id, ANCHOR_TAGS);
}
bool WebViewEdit::InsertHyperlink(const QString &href)
{
const QString &element_name = "a";
const QString &attribute_name = "href";
return InsertTagAttribute(element_name, attribute_name, href, ANCHOR_TAGS);
}
bool WebViewEdit::InsertTagAttribute(const QString &element_name, const QString &attribute_name, const QString &attribute_value, const QStringList &tag_list, bool ignore_selection)
{
QString selected_text = GetSelectedText();
if (SetAncestorTagAttributeValue(attribute_name, attribute_value, tag_list)) {
return true;
}
// We need to insert a new tag element into the document - cannot insert an empty
// element or else Qt will push it into a new block. So we will just insert the
// attribute value as some placeholder text.
if (selected_text.isEmpty()) {
selected_text = attribute_value;
}
QString safe_text(selected_text);
safe_text.replace("&","&");
safe_text.replace("<", "<");
safe_text.replace(">", ">");
// Just prepend and append the tag pairs to the text
const QString html = "<" + element_name + " " + attribute_name + "=\"" +
attribute_value + "\">" + safe_text + "</" + element_name + ">";
bool insert_ok = InsertHtml(html);
// We will have lost our selection from the insert - viewable text hasn't changed
for (int i = 0; i < selected_text.length(); i++) {
SelectPreviousChar();
}
return insert_ok;
}
QString WebViewEdit::GetAncestorTagAttributeValue(const QString &attribute_name, const QStringList &tag_list)
{
if (tag_list.isEmpty() || attribute_name.isEmpty()) {
return QString();
}
const QString js = c_GetAncestor + c_GetAncestorAttribute +
"var tagNames = [\"" + tag_list.join("\", \"") + "\"];"
"var attributeName = '" + attribute_name + "';"
"var startNode = document.getSelection().anchorNode;"
"get_ancestor_attribute(startNode, tagNames, attributeName);";
return EvaluateJavascript(js).toString();
}
bool WebViewEdit::SetAncestorTagAttributeValue(const QString &attribute_name, const QString &attribute_value, const QStringList &tag_list)
{
if (tag_list.isEmpty() || attribute_name.isEmpty()) {
return false;
}
const QString js = c_GetAncestor + c_SetAncestorAttribute +
"var tagNames = [\"" + tag_list.join("\", \"") + "\"];"
"var attributeName = '" + attribute_name + "';"
"var attributeValue = '" + attribute_value + "';"
"var startNode = document.getSelection().anchorNode;"
"set_ancestor_attribute(startNode, tagNames, attributeName, attributeValue);";
bool applied = EvaluateJavascript(js).toBool();
#if 0
if (applied) {
emit contentsChangedExtra();
}
#endif
return applied;
}
QString WebViewEdit::EscapeJSString(const QString &string)
{
QString new_string(string);
/* \ -> \\ */
// " -> \"
// ' -> \'
return new_string.replace("\\", "\\\\").replace("\"", "\\\"").replace("'", "\\'");
}
bool WebViewEdit::ExecCommand(const QString &command)
{
QString javascript = QString("document.execCommand( '%1', false, null)").arg(EscapeJSString(command));
return EvaluateJavascript(javascript).toBool();
}
bool WebViewEdit::ExecCommand(const QString &command, const QString ¶meter)
{
QString javascript = QString("document.execCommand( '%1', false, '%2' )")
.arg(EscapeJSString(command))
.arg(EscapeJSString(parameter));
return EvaluateJavascript(javascript).toBool();
}
QVariant WebViewEdit::EvaluateJavascript(const QString &javascript)
{
DBG qDebug() << "EvaluateJavascript: " << m_isLoadFinished;
// do not try to evaluate javascripts with the page not loaded yet
if (!m_isLoadFinished) return QVariant();
JSResult * pres = new JSResult();
QDeadlineTimer deadline(10000); // in milliseconds
DBG qDebug() << "evaluate javascript" << javascript;
page()->runJavaScript(javascript, QWebEngineScript::ApplicationWorld, SetJavascriptResultFunctor(pres));
while(!pres->isFinished() && (!deadline.hasExpired())) {
qApp->processEvents(QEventLoop::ExcludeUserInputEvents, 100);
}
QVariant res;
if (pres->isFinished()) {
res = pres->res;
delete pres;
} else {
qDebug() << "Error: WebView EvaluateJavascript timed out";
qDebug() << " ... intentionally leaking the JSResult structure";
}
return res;
}
void WebViewEdit::DoJavascript(const QString &javascript)
{
DBG qDebug() << "run javascript with " << m_isLoadFinished;
// do not try to evaluate javascripts with the page not loaded yet
if (!m_isLoadFinished) return;
page()->runJavaScript(javascript, QWebEngineScript::ApplicationWorld);
}
bool WebViewEdit::QueryCommandState(const QString &command)
{
QString javascript = QString("document.queryCommandState( '%1', false, null)").arg(EscapeJSString(command));
return EvaluateJavascript(javascript).toBool();
}
void WebViewEdit::FormatBlock(const QString &element_name, bool preserve_attributes)
{
if (element_name.isEmpty()) {
return;
}
QString preserve = preserve_attributes ? "true" : "false";
QString javascript = c_GetBlock + c_FormatBlock +
"var node = document.getSelection().anchorNode;"
"var startNode = get_block( node );"
"var element = format_block( startNode, \"" + element_name + "\", " + preserve + " );"
"startNode.parentNode.replaceChild( element, startNode );"
+ SET_CURSOR_JS2;
DoJavascript(javascript);
}
// If we don't steal focus first, then the QWebView
// can have focus (and its QWebFrame) and still not
// really have it (no blinking cursor).
// We also still need to attempt to GrabFocus even
// when shown as a Preview page (even though no cursor
// is shown) or else the QStackWidget will explode on
// Windows when switching to another tab when it tries
// to determine where the previous focus was.
void WebViewEdit::GrabFocus()
{
ScrollToTop();
qobject_cast<QWidget *>(parent())->setFocus();
QWebEngineView::setFocus(Qt::MouseFocusReason);
}
void WebViewEdit::SetDocumentEditable(bool newstate)
{
if (newstate) {
page()->runJavaScript("document.documentElement.contentEditable = true", QWebEngineScript::ApplicationWorld);
ExecCommand("defaultParagraphSeparator","p");
} else {
page()->runJavaScript("document.documentElement.contentEditable = false", QWebEngineScript::ApplicationWorld);
}
}
void WebViewEdit::WebPageJavascriptOnLoad()
{
page()->runJavaScript(c_jQuery, QWebEngineScript::ApplicationWorld);
page()->runJavaScript(c_jQueryScrollTo, QWebEngineScript::ApplicationWorld);
// page()->runJavaScript("document.documentElement.contentEditable = true", QWebEngineScript::ApplicationWorld);
// set load finished only when javascript has been loaded and ready to run
m_isLoadFinished = true;
if (m_CustomSetDocumentInProgress) {
if (!m_pendingScrollToFragment.isEmpty()) {
ScrollToFragment(m_pendingScrollToFragment);
m_pendingScrollToFragment.clear();
} else {
executeCaretUpdateInternal();
}
m_CustomSetDocumentInProgress = false;
}
}
QString WebViewEdit::GetElementSelectingJS_NoTextNodes(const QList<ElementIndex> &hierarchy) const
{
// TODO: see if replacing jQuery with pure JS will speed up
// caret location scrolling... note the children()/contents() difference:
// children() only considers element nodes, contents() considers text nodes too.
QString element_selector = "$('html')";
// We will have a different hierarchy depending on whether it was generated by CodeView or
// generated by Preview. If the last element is '#text', strip it off and make sure the
// element preceding it has a -1 index in order for the caret to move correctly.
bool adjust_last_index = false;
int hierarchy_length = hierarchy.count() - 1;
if (hierarchy_length > 1 && hierarchy.last().name == "#text") {
hierarchy_length--;
}
for (int i = 0; i < hierarchy_length; ++i) {
int index = hierarchy[ i ].index;
if ((i == hierarchy_length) && adjust_last_index) {
index = -1;
}
element_selector.append(QString(".children().eq(%1)").arg(index));
}
element_selector.append(".get(0)");
return element_selector;
}
QList<ElementIndex> WebViewEdit::GetCaretLocation()
{
// The location element hierarchy encoded in a string
QString location_string = EvaluateJavascript(c_GetCaretLocation).toString();
return ConvertQWebPathToHierarchy(location_string);
}
QList<ElementIndex> WebViewEdit::ConvertQWebPathToHierarchy(const QString & webpath) const
{
// The location element hierarchy encoded in a string
QString location_string = webpath;
QStringList elements = location_string.split(",", Qt::SkipEmptyParts);
QList<ElementIndex> location;
foreach(QString element, elements) {
ElementIndex new_element;
new_element.name = element.split(" ")[ 0 ];
new_element.index = element.split(" ")[ 1 ].toInt();
location.append(new_element);
}
return location;
}
QString WebViewEdit::ConvertHierarchyToQWebPath(const QList<ElementIndex>& hierarchy)
{
QStringList pathparts;
for (int i=0; i < hierarchy.count(); i++) {
QString part = hierarchy.at(i).name + " " + QString::number(hierarchy.at(i).index);
pathparts.append(part);
}
return pathparts.join(",");
}
void WebViewEdit::StoreCurrentCaretLocation()
{
// Only overwrite the current location stored if it is empty, in case we specifically
// want a new location when switching to a new view
if (m_CaretLocationUpdate.isEmpty()) {
StoreCaretLocationUpdate(GetCaretLocation());
}
}
void WebViewEdit::StoreCaretLocationUpdate(const QList<ElementIndex> &hierarchy)
{
QString caret_location = "var element = " + GetElementSelectingJS_NoTextNodes(hierarchy) + ";";
// We scroll to the element and center the screen on it
QString scroll = "var from_top = window.innerHeight / 2;"
"if (typeof element !== 'undefined') {"
"$.scrollTo( element, 0, {offset: {top:-from_top, left:0 } } );";
m_CaretLocationUpdate = caret_location + scroll + SET_CURSOR_JS2 + "}";
}
QString WebViewEdit::GetElementSelectingJS_WithTextNode(const QList<ElementIndex> &hierarchy) const
{
QString element_selector = "$('html')";
for (int i = 0; i < hierarchy.count() - 1; ++i) {
element_selector.append(QString(".children().eq(%1)").arg(hierarchy[ i ].index));
}
element_selector.append(QString(".contents().eq(%1)").arg(hierarchy.last().index));
element_selector.append(".get(0)");
return element_selector;
}
bool WebViewEdit::ExecuteCaretUpdate()
{
// If there is no caret location update pending...
if (m_CaretLocationUpdate.isEmpty()) {
return false;
}
// run it...
DoJavascript(m_CaretLocationUpdate);
// ...and clear the update.
m_CaretLocationUpdate.clear();
return true;
}
bool WebViewEdit::ExecuteCaretUpdate(const QString &caret_update)
{
// This overload is for use with the Back To Link type functionality, where we have
// a specific caret location javascript we want to force when the tab is fully loaded.
if (!caret_update.isEmpty()) {
m_CaretLocationUpdate = caret_update;
return ExecuteCaretUpdate();
}
return false;
}
bool WebViewEdit::PasteClipNumber(int clip_number)
{
ClipEditorModel::clipEntry *clip = ClipEditorModel::instance()->GetEntryFromNumber(clip_number);
if (!clip) {
return false;
}
PasteClipEntry(clip);
return true;
}
bool WebViewEdit::PasteClipEntries(const QList<ClipEditorModel::clipEntry *> &clips)
{
bool applied = false;
foreach(ClipEditorModel::clipEntry * clip, clips) {
applied = applied || PasteClipEntry(clip);
}
return applied;
}
bool WebViewEdit::PasteClipEntry(ClipEditorModel::clipEntry *clip)
{
if (!clip || clip->text.isEmpty()) {
return false;
}
QString text = clip->text;
if (text.contains("\\1")) {
text.replace("\\1", GetSelectedText());
}
InsertHtml(text);
return true;
}
void WebViewEdit::ConnectSignalsToSlots()
{
connect(page(), SIGNAL(loadFinished(bool)), this, SLOT(UpdateFinishedState(bool)));
connect(page(), SIGNAL(loadFinished(bool)), this, SLOT(WebPageJavascriptOnLoad()));
connect(page(), SIGNAL(loadStarted()), this, SLOT(LoadingStarted()));
connect(page(), SIGNAL(loadProgress(int)), this, SLOT(LoadingProgress(int)));
connect(page(), SIGNAL(LinkClicked(const QUrl &)), this, SIGNAL(LinkClicked(const QUrl &)));
connect(page(), SIGNAL(linkHovered(const QString &)), this, SLOT(LinkHovered(const QString &)));
}