summaryrefslogtreecommitdiff
path: root/src/plugins/vcsbase/vcsbaseeditor.cpp
blob: 771f5b03fb39928fa8b46a964f7922d51a47229d (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
/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/

#include "vcsbaseeditor.h"
#include "diffhighlighter.h"
#include "baseannotationhighlighter.h"
#include "vcsbasetextdocument.h"
#include "vcsbaseconstants.h"

#include <coreplugin/editormanager/editormanager.h>
#include <coreplugin/uniqueidmanager.h>
#include <coreplugin/editormanager/editormanager.h>
#include <coreplugin/ifile.h>
#include <coreplugin/iversioncontrol.h>
#include <extensionsystem/pluginmanager.h>
#include <projectexplorer/editorconfiguration.h>
#include <projectexplorer/projectexplorer.h>
#include <projectexplorer/project.h>
#include <projectexplorer/session.h>
#include <texteditor/fontsettings.h>
#include <texteditor/texteditorconstants.h>
#include <utils/qtcassert.h>

#include <QtCore/QDebug>
#include <QtCore/QFileInfo>
#include <QtCore/QProcess>
#include <QtCore/QRegExp>
#include <QtCore/QSet>
#include <QtCore/QTextCodec>
#include <QtCore/QTextStream>
#include <QtGui/QAction>
#include <QtGui/QKeyEvent>
#include <QtGui/QLayout>
#include <QtGui/QMenu>
#include <QtGui/QTextCursor>
#include <QtGui/QTextEdit>
#include <QtGui/QComboBox>
#include <QtGui/QToolBar>
#include <QtGui/QClipboard>
#include <QtGui/QApplication>

namespace VCSBase {

// VCSBaseEditorEditable: An editable with no support for duplicates
// Creates a browse combo in the toolbar for diff output.
// It also mirrors the signals of the VCSBaseEditor since the editor
// manager passes the Editable around.
class VCSBaseEditorEditable : public TextEditor::BaseTextEditorEditable
{
    Q_OBJECT
public:
    VCSBaseEditorEditable(VCSBaseEditor *,
                          const VCSBaseEditorParameters *type);
    QList<int> context() const;

    bool duplicateSupported() const { return false; }
    Core::IEditor *duplicate(QWidget * /*parent*/) { return 0; }
    const char *kind() const { return m_kind; }

    bool isTemporary() const { return true; }

signals:
    void describeRequested(const QString &source, const QString &change);
    void annotateRevisionRequested(const QString &source, const QString &change, int line);

private:
    const char *m_kind;
    QList<int> m_context;
};

VCSBaseEditorEditable::VCSBaseEditorEditable(VCSBaseEditor *editor,
                                             const VCSBaseEditorParameters *type)  :
    BaseTextEditorEditable(editor),
    m_kind(type->kind)
{
    Core::UniqueIDManager *uidm = Core::UniqueIDManager::instance();
    m_context << uidm->uniqueIdentifier(QLatin1String(type->context))
              << uidm->uniqueIdentifier(QLatin1String(TextEditor::Constants::C_TEXTEDITOR));
}

QList<int> VCSBaseEditorEditable::context() const
{
    return m_context;
}

// Diff editable: creates a browse combo in the toolbar for diff output.
class VCSBaseDiffEditorEditable : public VCSBaseEditorEditable
{
public:
    VCSBaseDiffEditorEditable(VCSBaseEditor *, const VCSBaseEditorParameters *type);
    ~VCSBaseDiffEditorEditable();

    virtual QWidget *toolBar()                { return m_toolBar; }
    QComboBox *diffFileBrowseComboBox() const  { return m_diffFileBrowseComboBox; }

    bool isTemporary() const { return true; }

private:
    QToolBar *m_toolBar;
    QComboBox *m_diffFileBrowseComboBox;
};

VCSBaseDiffEditorEditable::VCSBaseDiffEditorEditable(VCSBaseEditor *e, const VCSBaseEditorParameters *type) :
    VCSBaseEditorEditable(e, type),
    m_toolBar(new QToolBar),
    m_diffFileBrowseComboBox(new QComboBox(m_toolBar))
{
    m_diffFileBrowseComboBox->setMinimumContentsLength(20);
    m_diffFileBrowseComboBox->setSizeAdjustPolicy(QComboBox::AdjustToContents);
    // Make the combo box prefer to expand
    QSizePolicy policy = m_diffFileBrowseComboBox->sizePolicy();
    policy.setHorizontalPolicy(QSizePolicy::Expanding);
    m_diffFileBrowseComboBox->setSizePolicy(policy);
    m_toolBar->addWidget(m_diffFileBrowseComboBox);
}

VCSBaseDiffEditorEditable::~VCSBaseDiffEditorEditable()
{
    delete m_toolBar;
}

// ----------- VCSBaseEditorPrivate

struct VCSBaseEditorPrivate
{
    VCSBaseEditorPrivate(const VCSBaseEditorParameters *type);

    const VCSBaseEditorParameters *m_parameters;

    QString m_currentChange;
    QString m_source;
    QString m_diffBaseDirectory;

    QRegExp m_diffFilePattern;
    QList<int> m_diffSections; // line number where this section starts
    int m_cursorLine;
    QString m_annotateRevisionTextFormat;
    QString m_copyRevisionTextFormat;
    bool m_fileLogAnnotateEnabled;
};

VCSBaseEditorPrivate::VCSBaseEditorPrivate(const VCSBaseEditorParameters *type)  :
    m_parameters(type),
    m_cursorLine(-1),
    m_annotateRevisionTextFormat(VCSBaseEditor::tr("Annotate \"%1\"")),
    m_copyRevisionTextFormat(VCSBaseEditor::tr("Copy \"%1\"")),
    m_fileLogAnnotateEnabled(false)
{
}

// ------------ VCSBaseEditor
VCSBaseEditor::VCSBaseEditor(const VCSBaseEditorParameters *type, QWidget *parent)
  : BaseTextEditor(parent),
    d(new VCSBaseEditorPrivate(type))
{
    if (VCSBase::Constants::Internal::debug)
        qDebug() << "VCSBaseEditor::VCSBaseEditor" << type->type << type->kind;

    setReadOnly(true);
    viewport()->setMouseTracking(true);
    setBaseTextDocument(new Internal::VCSBaseTextDocument);
    setMimeType(QLatin1String(d->m_parameters->mimeType));
}

void VCSBaseEditor::init()
{
    switch (d->m_parameters->type) {
    case RegularCommandOutput:
    case LogOutput:
    case AnnotateOutput:
        // Annotation highlighting depends on contents, which is set later on
        connect(this, SIGNAL(textChanged()), this, SLOT(slotActivateAnnotation()));
        break;
    case DiffOutput: {
        DiffHighlighter *dh = createDiffHighlighter();
        baseTextDocument()->setSyntaxHighlighter(dh);
        d->m_diffFilePattern = dh->filePattern();
        connect(this, SIGNAL(textChanged()), this, SLOT(slotPopulateDiffBrowser()));
        connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(slotDiffCursorPositionChanged()));
    }
        break;
    }
}

VCSBaseEditor::~VCSBaseEditor()
{
    delete d;
}

QString VCSBaseEditor::source() const
{
    return d->m_source;
}

void VCSBaseEditor::setSource(const  QString &source)
{
    d->m_source = source;
}

QString VCSBaseEditor::annotateRevisionTextFormat() const
{
    return d->m_annotateRevisionTextFormat;
}

void VCSBaseEditor::setAnnotateRevisionTextFormat(const QString &f)
{
    d->m_annotateRevisionTextFormat = f;
}

QString VCSBaseEditor::copyRevisionTextFormat() const
{
    return d->m_copyRevisionTextFormat;
}

void VCSBaseEditor::setCopyRevisionTextFormat(const QString &f)
{
    d->m_copyRevisionTextFormat = f;
}

bool VCSBaseEditor::isFileLogAnnotateEnabled() const
{
    return d->m_fileLogAnnotateEnabled;
}

void VCSBaseEditor::setFileLogAnnotateEnabled(bool e)
{
    d->m_fileLogAnnotateEnabled = e;
}

QString VCSBaseEditor::diffBaseDirectory() const
{
    return d->m_diffBaseDirectory;
}

void VCSBaseEditor::setDiffBaseDirectory(const QString &bd)
{
    d->m_diffBaseDirectory = bd;
}

QTextCodec *VCSBaseEditor::codec() const
{
    return baseTextDocument()->codec();
}

void VCSBaseEditor::setCodec(QTextCodec *c)
{
    if (c) {
        baseTextDocument()->setCodec(c);
    } else {
        qWarning("%s: Attempt to set 0 codec.", Q_FUNC_INFO);
    }
}

EditorContentType VCSBaseEditor::contentType() const
{
    return d->m_parameters->type;
}

bool VCSBaseEditor::isModified() const
{
    return false;
}

TextEditor::BaseTextEditorEditable *VCSBaseEditor::createEditableInterface()
{
    TextEditor::BaseTextEditorEditable *editable = 0;
    if (d->m_parameters->type == DiffOutput) {
        // Diff: set up diff file browsing
        VCSBaseDiffEditorEditable *de = new VCSBaseDiffEditorEditable(this, d->m_parameters);
        QComboBox *diffBrowseComboBox = de->diffFileBrowseComboBox();
        connect(diffBrowseComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(slotDiffBrowse(int)));
        editable = de;
    } else {
        editable = new VCSBaseEditorEditable(this, d->m_parameters);
    }
    // Pass on signals.
    connect(this, SIGNAL(describeRequested(QString,QString)),
            editable, SIGNAL(describeRequested(QString,QString)));
    connect(this, SIGNAL(annotateRevisionRequested(QString,QString,int)),
            editable, SIGNAL(annotateRevisionRequested(QString,QString,int)));
    return editable;
}

void VCSBaseEditor::slotPopulateDiffBrowser()
{
    VCSBaseDiffEditorEditable *de = static_cast<VCSBaseDiffEditorEditable*>(editableInterface());
    QComboBox *diffBrowseComboBox = de->diffFileBrowseComboBox();
    diffBrowseComboBox->clear();
    d->m_diffSections.clear();
    // Create a list of section line numbers (diffed files)
    // and populate combo with filenames.
    const QTextBlock cend = document()->end();
    int lineNumber = 0;
    QString lastFileName;
    for (QTextBlock it = document()->begin(); it != cend; it = it.next(), lineNumber++) {
        const QString text = it.text();
        // Check for a new diff section (not repeating the last filename)
        if (d->m_diffFilePattern.exactMatch(text)) {
            const QString file = fileNameFromDiffSpecification(it);
            if (!file.isEmpty() && lastFileName != file) {
                lastFileName = file;
                // ignore any headers
                d->m_diffSections.push_back(d->m_diffSections.empty() ? 0 : lineNumber);
                diffBrowseComboBox->addItem(QFileInfo(file).fileName());
            }
        }
    }
}

void VCSBaseEditor::slotDiffBrowse(int index)        
{
    // goto diffed file as indicated by index/line number
    if (index < 0 || index >= d->m_diffSections.size())
        return;    
    const int lineNumber = d->m_diffSections.at(index);
    Core::EditorManager *editorManager = Core::EditorManager::instance();
    editorManager->addCurrentPositionToNavigationHistory();
    gotoLine(lineNumber + 1, 0); // TextEdit uses 1..n convention
}

// Locate a line number in the list of diff sections.
static int sectionOfLine(int line, const QList<int> &sections)
{
    const int sectionCount = sections.size();
    if (!sectionCount)
        return -1;
    // The section at s indicates where the section begins.
    for (int s = 0; s < sectionCount; s++) {
        if (line < sections.at(s))
            return s - 1;
    }
    return sectionCount - 1;
}

void VCSBaseEditor::slotDiffCursorPositionChanged()
{
    // Adapt diff file browse combo to new position
    // if the cursor goes across a file line.
    QTC_ASSERT(d->m_parameters->type == DiffOutput, return)
    const int newCursorLine = textCursor().blockNumber();    
    if (newCursorLine == d->m_cursorLine)
        return;
    // Which section does it belong to?
    d->m_cursorLine = newCursorLine;
    const int section = sectionOfLine(d->m_cursorLine, d->m_diffSections);
    if (section != -1) {
        VCSBaseDiffEditorEditable *de = static_cast<VCSBaseDiffEditorEditable*>(editableInterface());
        QComboBox *diffBrowseComboBox = de->diffFileBrowseComboBox();
        if (diffBrowseComboBox->currentIndex() != section) {
            const bool blocked = diffBrowseComboBox->blockSignals(true);
            diffBrowseComboBox->setCurrentIndex(section);
            diffBrowseComboBox->blockSignals(blocked);
        }
    }
}

QAction *VCSBaseEditor::createDescribeAction(const QString &change)
{
    QAction *a = new QAction(tr("Describe change %1").arg(change), 0);
    connect(a, SIGNAL(triggered()), this, SLOT(describe()));
    return a;
}

QAction *VCSBaseEditor::createAnnotateAction(const QString &change)
{
    QAction *a = new QAction(d->m_annotateRevisionTextFormat.arg(change), 0);
    a->setData(change);
    connect(a, SIGNAL(triggered()), this, SLOT(slotAnnotateRevision()));
    return a;
}

QAction *VCSBaseEditor::createCopyRevisionAction(const QString &change)
{
    QAction *a = new QAction(d->m_copyRevisionTextFormat.arg(change), 0);
    a->setData(change);
    connect(a, SIGNAL(triggered()), this, SLOT(slotCopyRevision()));
    return a;
}

void VCSBaseEditor::contextMenuEvent(QContextMenuEvent *e)
{
    QMenu *menu = createStandardContextMenu();
    // 'click on change-interaction'
    if (d->m_parameters->type == LogOutput || d->m_parameters->type == AnnotateOutput) {
        d->m_currentChange = changeUnderCursor(cursorForPosition(e->pos()));
        if (!d->m_currentChange.isEmpty()) {
            switch (d->m_parameters->type) {
            case LogOutput: // Describe current / Annotate file of current
                menu->addSeparator();
                menu->addAction(createCopyRevisionAction(d->m_currentChange));
                menu->addAction(createDescribeAction(d->m_currentChange));
                if (d->m_fileLogAnnotateEnabled)
                    menu->addAction(createAnnotateAction(d->m_currentChange));
                break;
            case AnnotateOutput: { // Describe current / annotate previous
                    menu->addSeparator();
                    menu->addAction(createCopyRevisionAction(d->m_currentChange));
                    menu->addAction(createDescribeAction(d->m_currentChange));
                    const QStringList previousVersions = annotationPreviousVersions(d->m_currentChange);
                    if (!previousVersions.isEmpty()) {
                        menu->addSeparator();
                        foreach(const QString &pv, previousVersions)
                            menu->addAction(createAnnotateAction(pv));
                    } // has previous versions
                }
                break;
            default:
                break;
            }         // switch type
        }             // has current change
    }
    menu->exec(e->globalPos());
    delete menu;
}

void VCSBaseEditor::mouseMoveEvent(QMouseEvent *e)
{
    bool overrideCursor = false;
    Qt::CursorShape cursorShape;

    if (d->m_parameters->type == LogOutput || d->m_parameters->type == AnnotateOutput) {
        // Link emulation behaviour for 'click on change-interaction'
        QTextCursor cursor = cursorForPosition(e->pos());
        QString change = changeUnderCursor(cursor);
        if (!change.isEmpty()) {
            QTextEdit::ExtraSelection sel;
            sel.cursor = cursor;
            sel.cursor.select(QTextCursor::WordUnderCursor);
            sel.format.setFontUnderline(true);
            sel.format.setProperty(QTextFormat::UserProperty, change);
            setExtraSelections(OtherSelection, QList<QTextEdit::ExtraSelection>() << sel);
            overrideCursor = true;
            cursorShape = Qt::PointingHandCursor;
        }
    } else {
        setExtraSelections(OtherSelection, QList<QTextEdit::ExtraSelection>());
        overrideCursor = true;
        cursorShape = Qt::IBeamCursor;
    }
    TextEditor::BaseTextEditor::mouseMoveEvent(e);

    if (overrideCursor)
        viewport()->setCursor(cursorShape);
}

void VCSBaseEditor::mouseReleaseEvent(QMouseEvent *e)
{
    if (d->m_parameters->type == LogOutput || d->m_parameters->type == AnnotateOutput) {
        if (e->button() == Qt::LeftButton &&!(e->modifiers() & Qt::ShiftModifier)) {
            QTextCursor cursor = cursorForPosition(e->pos());
            d->m_currentChange = changeUnderCursor(cursor);
            if (!d->m_currentChange.isEmpty()) {
                describe();
                e->accept();
                return;
            }
        }
    }
    TextEditor::BaseTextEditor::mouseReleaseEvent(e);
}

void VCSBaseEditor::mouseDoubleClickEvent(QMouseEvent *e)
{
    if (d->m_parameters->type == DiffOutput) {
        if (e->button() == Qt::LeftButton &&!(e->modifiers() & Qt::ShiftModifier)) {
            QTextCursor cursor = cursorForPosition(e->pos());
            jumpToChangeFromDiff(cursor);
        }
    }
    TextEditor::BaseTextEditor::mouseDoubleClickEvent(e);
}

void VCSBaseEditor::keyPressEvent(QKeyEvent *e)
{
    if (e->key() == Qt::Key_Enter || e->key() == Qt::Key_Return) {
        jumpToChangeFromDiff(textCursor());
        return;
    }
    BaseTextEditor::keyPressEvent(e);
}

void VCSBaseEditor::describe()
{
    if (VCSBase::Constants::Internal::debug)
        qDebug() << "VCSBaseEditor::describe" << d->m_currentChange;
    if (!d->m_currentChange.isEmpty())
        emit describeRequested(d->m_source, d->m_currentChange);
}

void VCSBaseEditor::slotActivateAnnotation()
{
    // The annotation highlighting depends on contents (change number
    // set with assigned colors)
    if (d->m_parameters->type != AnnotateOutput)
        return;

    const QSet<QString> changes = annotationChanges();
    if (changes.isEmpty())
        return;
    if (VCSBase::Constants::Internal::debug)
        qDebug() << "VCSBaseEditor::slotActivateAnnotation(): #" << changes.size();

    disconnect(this, SIGNAL(textChanged()), this, SLOT(slotActivateAnnotation()));

    if (BaseAnnotationHighlighter *ah = qobject_cast<BaseAnnotationHighlighter *>(baseTextDocument()->syntaxHighlighter())) {
        ah->setChangeNumbers(changes);
        ah->rehighlight();
    } else {
        baseTextDocument()->setSyntaxHighlighter(createAnnotationHighlighter(changes));
    }
}

// Check for a change chunk "@@ -91,7 +95,7 @@" and return
// the modified line number (95).
// Note that git appends stuff after "  @@" (function names, etc.).
static inline bool checkChunkLine(const QString &line, int *modifiedLineNumber)
{
    if (!line.startsWith(QLatin1String("@@ ")))
        return false;
    const int endPos = line.indexOf(QLatin1String(" @@"), 3);
    if (endPos == -1)
        return false;
    // the first chunk range applies to the original file, the second one to
    // the modified file, the one we're interested int
    const int plusPos = line.indexOf(QLatin1Char('+'), 3);
    if (plusPos == -1 || plusPos > endPos)
        return false;
    const int lineNumberPos = plusPos + 1;
    const int commaPos = line.indexOf(QLatin1Char(','), lineNumberPos);
    if (commaPos == -1 || commaPos > endPos)
        return false;
    const QString lineNumberStr = line.mid(lineNumberPos, commaPos - lineNumberPos);
    bool ok;
    *modifiedLineNumber = lineNumberStr.toInt(&ok);
    return ok;
}

void VCSBaseEditor::jumpToChangeFromDiff(QTextCursor cursor)
{
    int chunkStart = 0;
    int lineCount = -1;
    const QChar deletionIndicator = QLatin1Char('-');
    // find nearest change hunk
    QTextBlock block = cursor.block();
    for ( ; block.isValid() ; block = block.previous()) {
        const QString line = block.text();
        if (checkChunkLine(line, &chunkStart)) {
            break;
        } else {
            if (!line.startsWith(deletionIndicator))
                ++lineCount;
        }
    }

    if (VCSBase::Constants::Internal::debug)
        qDebug() << "VCSBaseEditor::jumpToChangeFromDiff()1" << chunkStart << lineCount;

    if (chunkStart == -1 || lineCount < 0 || !block.isValid())
        return;

    // find the filename in previous line, map depot name back
    block = block.previous();
    if (!block.isValid())
        return;
    const QString fileName = fileNameFromDiffSpecification(block);

    const bool exists = fileName.isEmpty() ? false : QFile::exists(fileName);

    if (VCSBase::Constants::Internal::debug)
        qDebug() << "VCSBaseEditor::jumpToChangeFromDiff()2" << fileName << "ex=" << exists << "line" << chunkStart <<  lineCount;

    if (!exists)
        return;

    Core::EditorManager *em = Core::EditorManager::instance();
    Core::IEditor *ed = em->openEditor(fileName);
    em->ensureEditorManagerVisible();
    if (TextEditor::ITextEditor *editor = qobject_cast<TextEditor::ITextEditor *>(ed))
        editor->gotoLine(chunkStart + lineCount);
}

void VCSBaseEditor::setPlainTextData(const QByteArray &data)
{
    setPlainText(codec()->toUnicode(data));
}

void VCSBaseEditor::setFontSettings(const TextEditor::FontSettings &fs)
{
    TextEditor::BaseTextEditor::setFontSettings(fs);
    if (d->m_parameters->type == DiffOutput) {
        if (DiffHighlighter *highlighter = qobject_cast<DiffHighlighter*>(baseTextDocument()->syntaxHighlighter())) {
            static QVector<QString> categories;
            if (categories.isEmpty()) {
                categories << QLatin1String(TextEditor::Constants::C_TEXT)
                           << QLatin1String(TextEditor::Constants::C_ADDED_LINE)
                           << QLatin1String(TextEditor::Constants::C_REMOVED_LINE)
                           << QLatin1String(TextEditor::Constants::C_DIFF_FILE)
                           << QLatin1String(TextEditor::Constants::C_DIFF_LOCATION);
            }
            highlighter->setFormats(fs.toTextCharFormats(categories));
            highlighter->rehighlight();
        }
    }
}

const VCSBaseEditorParameters *VCSBaseEditor::findType(const VCSBaseEditorParameters *array,
                                                       int arraySize,
                                                       EditorContentType et)
{
    for (int i = 0; i < arraySize; i++)
        if (array[i].type == et)
            return array + i;
    return 0;
}

// Find the codec used for a file querying the editor.
static QTextCodec *findFileCodec(const QString &source)
{
    typedef QList<Core::IEditor *> EditorList;

    const EditorList editors = Core::EditorManager::instance()->editorsForFileName(source);
    if (!editors.empty()) {
        const EditorList::const_iterator ecend =  editors.constEnd();
        for (EditorList::const_iterator it = editors.constBegin(); it != ecend; ++it)
            if (const TextEditor::BaseTextEditorEditable *be = qobject_cast<const TextEditor::BaseTextEditorEditable *>(*it)) {
                QTextCodec *codec = be->editor()->textCodec();
                if (VCSBase::Constants::Internal::debug)
                    qDebug() << Q_FUNC_INFO << source << codec->name();
                return codec;
            }
    }
    if (VCSBase::Constants::Internal::debug)
        qDebug() << Q_FUNC_INFO << source << "not found";
    return 0;
}

// Find the codec by checking the projects (root dir of project file)
static QTextCodec *findProjectCodec(const QString &dir)
{
    typedef  QList<ProjectExplorer::Project*> ProjectList;
    // Try to find a project under which file tree the file is.
    const ProjectExplorer::SessionManager *sm = ProjectExplorer::ProjectExplorerPlugin::instance()->session();
    const ProjectList projects = sm->projects();
    if (!projects.empty()) {
        const ProjectList::const_iterator pcend = projects.constEnd();
        for (ProjectList::const_iterator it = projects.constBegin(); it != pcend; ++it)
            if (const Core::IFile *file = (*it)->file())
                if (file->fileName().startsWith(dir)) {
                    QTextCodec *codec = (*it)->editorConfiguration()->defaultTextCodec();
                    if (VCSBase::Constants::Internal::debug)
                        qDebug() << Q_FUNC_INFO << dir << (*it)->name() << codec->name();
                    return codec;
                }
    }
    if (VCSBase::Constants::Internal::debug)
        qDebug() << Q_FUNC_INFO << dir << "not found";
    return 0;
}

QTextCodec *VCSBaseEditor::getCodec(const QString &source)
{
    if (!source.isEmpty()) {
        // Check file
        const QFileInfo sourceFi(source);
        if (sourceFi.isFile())
            if (QTextCodec *fc = findFileCodec(source))
                return fc;
        // Find by project via directory
        if (QTextCodec *pc = findProjectCodec(sourceFi.isFile() ? sourceFi.absolutePath() : source))
            return pc;
    }
    QTextCodec *sys = QTextCodec::codecForLocale();
    if (VCSBase::Constants::Internal::debug)
        qDebug() << Q_FUNC_INFO << source << "defaulting to " << sys->name();
    return sys;
}

QTextCodec *VCSBaseEditor::getCodec(const QString &workingDirectory, const QStringList &files)
{
    if (files.empty())
        return getCodec(workingDirectory);
    return getCodec(workingDirectory + QLatin1Char('/') + files.front());
}

VCSBaseEditor *VCSBaseEditor::getVcsBaseEditor(const Core::IEditor *editor)
{
    if (const TextEditor::BaseTextEditorEditable *be = qobject_cast<const TextEditor::BaseTextEditorEditable *>(editor))
        return qobject_cast<VCSBaseEditor *>(be->editor());
    return 0;
}

// Return line number of current editor if it matches.
int VCSBaseEditor::lineNumberOfCurrentEditor(const QString &currentFile)
{
    Core::IEditor *ed = Core::EditorManager::instance()->currentEditor();
    if (!ed)
        return -1;
    if (!currentFile.isEmpty()) {
        const Core::IFile *ifile  = ed->file();
        if (!ifile || ifile->fileName() != currentFile)
            return -1;
    }
    const TextEditor::BaseTextEditorEditable *eda = qobject_cast<const TextEditor::BaseTextEditorEditable *>(ed);
    if (!eda)
        return -1;
    return eda->currentLine();
}

bool VCSBaseEditor::gotoLineOfEditor(Core::IEditor *e, int lineNumber)
{
    if (lineNumber >= 0 && e) {
        if (TextEditor::BaseTextEditorEditable *be = qobject_cast<TextEditor::BaseTextEditorEditable*>(e)) {
            be->gotoLine(lineNumber);
            return true;
        }
    }
    return false;
}

// Return source file or directory string depending on parameters
// ('git diff XX' -> 'XX' , 'git diff XX file' -> 'XX/file').
QString VCSBaseEditor::getSource(const QString &workingDirectory,
                                 const QString &fileName)
{
    if (fileName.isEmpty())
        return workingDirectory;

    QString rc = workingDirectory;
    const QChar slash = QLatin1Char('/');
    if (!rc.isEmpty() && !(rc.endsWith(slash) || rc.endsWith(QLatin1Char('\\'))))
        rc += slash;
    rc += fileName;
    return rc;
}

QString VCSBaseEditor::getSource(const QString &workingDirectory,
                                 const QStringList &fileNames)
{
    return fileNames.size() == 1 ?
            getSource(workingDirectory, fileNames.front()) :
            workingDirectory;
}

QString VCSBaseEditor::getTitleId(const QString &workingDirectory,
                                  const QStringList &fileNames,
                                  const QString &revision)
{
    QString rc;
    switch (fileNames.size()) {
    case 0:
        rc = workingDirectory;
        break;
    case 1:
        rc = fileNames.front();
        break;
    default:
        rc = fileNames.join(QLatin1String(", "));
        break;
    }
    if (!revision.isEmpty()) {
        rc += QLatin1Char(':');
        rc += revision;
    }
    return rc;
}

// Find the complete file from a diff relative specification.
QString VCSBaseEditor::findDiffFile(const QString &f, Core::IVersionControl *control /* = 0 */) const
{
    // Try the file itself, expand to absolute.
    const QFileInfo in(f);
    if (in.isAbsolute())
        return in.isFile() ? f : QString();
    if (in.isFile())
        return in.absoluteFilePath();
    // 1) Try base dir
    const QChar slash = QLatin1Char('/');
    if (!d->m_diffBaseDirectory.isEmpty()) {
        const QFileInfo baseFileInfo(d->m_diffBaseDirectory + slash + f);
        if (baseFileInfo.isFile())
            return baseFileInfo.absoluteFilePath();
    }
    // 2) Try in source (which can be file or directory)
    if (source().isEmpty())
        return QString();
    const QFileInfo sourceInfo(source());
    const QString sourceDir = sourceInfo.isDir() ? sourceInfo.absoluteFilePath() : sourceInfo.absolutePath();
    const QFileInfo sourceFileInfo(sourceDir + slash + f);
    if (sourceFileInfo.isFile())
        return sourceFileInfo.absoluteFilePath();
    // Try to locate via repository.
    if (!control)
        return QString();
    const QString topLevel = control->findTopLevelForDirectory(sourceDir);
    if (topLevel.isEmpty())
        return QString();
    const QFileInfo topLevelFileInfo(topLevel + slash + f);
    if (topLevelFileInfo.isFile())
        return topLevelFileInfo.absoluteFilePath();
    return QString();
}

void VCSBaseEditor::slotAnnotateRevision()
{
    if (const QAction *a = qobject_cast<const QAction *>(sender()))
        emit annotateRevisionRequested(source(), a->data().toString(),
                                       editableInterface()->currentLine());
}

void VCSBaseEditor::slotCopyRevision()
{
    QApplication::clipboard()->setText(d->m_currentChange);
}

QStringList VCSBaseEditor::annotationPreviousVersions(const QString &) const
{
    return QStringList();
}

} // namespace VCSBase

#include "vcsbaseeditor.moc"