basetexteditor.cpp 229 KB
Newer Older
hjk's avatar
hjk committed
1
/****************************************************************************
con's avatar
con committed
2
**
3
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
hjk's avatar
hjk committed
4
** Contact: http://www.qt-project.org/legal
con's avatar
con committed
5
**
hjk's avatar
hjk committed
6
** This file is part of Qt Creator.
con's avatar
con committed
7
**
hjk's avatar
hjk committed
8 9 10 11 12 13 14
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/contact-us.
15
**
16
** GNU Lesser General Public License Usage
hjk's avatar
hjk committed
17 18 19 20 21 22 23 24 25
** 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.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
con's avatar
con committed
26 27
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
hjk's avatar
hjk committed
28
****************************************************************************/
hjk's avatar
hjk committed
29

30 31
#include "basetexteditor.h"
#include "basetexteditor_p.h"
hjk's avatar
hjk committed
32

con's avatar
con committed
33
#include "basetextdocument.h"
34
#include "basetextdocumentlayout.h"
35
#include "behaviorsettings.h"
con's avatar
con committed
36
#include "codecselector.h"
37
#include "completionsettings.h"
38
#include "tabsettings.h"
Jarek Kobus's avatar
Jarek Kobus committed
39 40
#include "typingsettings.h"
#include "icodestylepreferences.h"
41
#include "syntaxhighlighter.h"
42
#include "indenter.h"
43
#include "autocompleter.h"
44
#include "snippet.h"
Leandro Melo's avatar
Leandro Melo committed
45 46 47
#include "codeassistant.h"
#include "defaultassistinterface.h"
#include "convenience.h"
48
#include "texteditorsettings.h"
49
#include "texteditoroverlay.h"
50
#include "circularclipboard.h"
51
#include "circularclipboardassist.h"
con's avatar
con committed
52

53
#include <aggregation/aggregate.h>
54
#include <coreplugin/actionmanager/actionmanager.h>
55
#include <coreplugin/actionmanager/actioncontainer.h>
con's avatar
con committed
56
#include <coreplugin/coreconstants.h>
57
#include <coreplugin/editormanager/editormanager.h>
58
#include <coreplugin/infobar.h>
59
#include <coreplugin/manhattanstyle.h>
con's avatar
con committed
60 61
#include <find/basetextfind.h>
#include <utils/linecolumnlabel.h>
62
#include <utils/hostosinfo.h>
hjk's avatar
hjk committed
63
#include <utils/qtcassert.h>
64
#include <utils/stylehelper.h>
65 66
#include <utils/tooltip/tooltip.h>
#include <utils/tooltip/tipcontents.h>
67
#include <utils/uncommentselection.h>
con's avatar
con committed
68

69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91
#include <QCoreApplication>
#include <QTextCodec>
#include <QDebug>
#include <QTimer>
#include <QTimeLine>
#include <QMimeData>
#include <QAbstractTextDocumentLayout>
#include <QApplication>
#include <QKeyEvent>
#include <QPainter>
#include <QPrinter>
#include <QPrintDialog>
#include <QScrollBar>
#include <QShortcut>
#include <QStyle>
#include <QTextCursor>
#include <QTextDocumentFragment>
#include <QTextBlock>
#include <QTextLayout>
#include <QToolBar>
#include <QMenu>
#include <QMessageBox>
#include <QClipboard>
con's avatar
con committed
92

93 94
//#define DO_FOO

Leandro Melo's avatar
Leandro Melo committed
95 96 97 98 99 100 101 102 103 104 105 106
/*!
    \namespace TextEditor
    \brief The TextEditor namespace contains the base text editor and several classes which
    provide supporting functionality like snippets, highlighting, \l{CodeAssist}{code assist},
    indentation and style, and others.
*/

/*!
    \namespace TextEditor::Internal
    \internal
*/

con's avatar
con committed
107 108
using namespace TextEditor;
using namespace TextEditor::Internal;
109
using namespace Utils;
con's avatar
con committed
110 111

namespace TextEditor {
112
namespace Internal {
con's avatar
con committed
113 114

class TextEditExtraArea : public QWidget {
115
    BaseTextEditorWidget *textEdit;
con's avatar
con committed
116
public:
117
    TextEditExtraArea(BaseTextEditorWidget *edit):QWidget(edit) {
con's avatar
con committed
118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141
        textEdit = edit;
        setAutoFillBackground(true);
    }
public:

    QSize sizeHint() const {
        return QSize(textEdit->extraAreaWidth(), 0);
    }
protected:
    void paintEvent(QPaintEvent *event){
        textEdit->extraAreaPaintEvent(event);
    }
    void mousePressEvent(QMouseEvent *event){
        textEdit->extraAreaMouseEvent(event);
    }
    void mouseMoveEvent(QMouseEvent *event){
        textEdit->extraAreaMouseEvent(event);
    }
    void mouseReleaseEvent(QMouseEvent *event){
        textEdit->extraAreaMouseEvent(event);
    }
    void leaveEvent(QEvent *event){
        textEdit->extraAreaLeaveEvent(event);
    }
142 143 144
    void contextMenuEvent(QContextMenuEvent *event) {
        textEdit->extraAreaContextMenuEvent(event);
    }
con's avatar
con committed
145 146 147 148 149 150

    void wheelEvent(QWheelEvent *event) {
        QCoreApplication::sendEvent(textEdit->viewport(), event);
    }
};

151 152
} // namespace Internal
} // namespace TextEditor
con's avatar
con committed
153

154
Core::IEditor *BaseTextEditorWidget::openEditorAt(const QString &fileName, int line, int column,
hjk's avatar
hjk committed
155
                                 const Core::Id &editorKind,
156 157
                                 Core::EditorManager::OpenEditorFlags flags,
                                 bool *newEditor)
con's avatar
con committed
158
{
159
    Core::EditorManager *editorManager = Core::EditorManager::instance();
160
    editorManager->cutForwardNavigationHistory();
161
    editorManager->addCurrentPositionToNavigationHistory();
hjk's avatar
hjk committed
162
    Core::IEditor *editor = Core::EditorManager::openEditor(fileName, editorKind,
163
            flags, newEditor);
con's avatar
con committed
164
    TextEditor::ITextEditor *texteditor = qobject_cast<TextEditor::ITextEditor *>(editor);
165
    if (texteditor && line != -1) {
con's avatar
con committed
166 167 168
        texteditor->gotoLine(line, column);
        return texteditor;
    }
169

170
    return editor;
con's avatar
con committed
171 172
}

173
QString BaseTextEditorWidget::plainTextFromSelection(const QTextCursor &cursor) const
174
{
175 176 177 178 179 180 181 182 183 184
    // Copy the selected text as plain text
    QString text = cursor.selectedText();
    return convertToPlainText(text);
}

QString BaseTextEditorWidget::convertToPlainText(const QString &txt)
{
    QString ret = txt;
    QChar *uc = ret.data();
    QChar *e = uc + ret.size();
185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200

    for (; uc != e; ++uc) {
        switch (uc->unicode()) {
        case 0xfdd0: // QTextBeginningOfFrame
        case 0xfdd1: // QTextEndOfFrame
        case QChar::ParagraphSeparator:
        case QChar::LineSeparator:
            *uc = QLatin1Char('\n');
            break;
        case QChar::Nbsp:
            *uc = QLatin1Char(' ');
            break;
        default:
            ;
        }
    }
201
    return ret;
202 203
}

Orgad Shaneh's avatar
Orgad Shaneh committed
204 205
static const char kTextBlockMimeType[] = "application/vnd.qtcreator.blocktext";
static const char kVerticalTextBlockMimeType[] = "application/vnd.qtcreator.vblocktext";
206 207


208
BaseTextEditorWidget::BaseTextEditorWidget(QWidget *parent)
con's avatar
con committed
209 210
    : QPlainTextEdit(parent)
{
211
    d = new BaseTextEditorWidgetPrivate;
con's avatar
con committed
212 213 214 215 216
    d->q = this;
    d->m_extraArea = new TextEditExtraArea(this);
    d->m_extraArea->setMouseTracking(true);
    setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);

217
    d->m_overlay = new TextEditorOverlay(this);
218
    d->m_snippetOverlay = new TextEditorOverlay(this);
219
    d->m_searchResultOverlay = new TextEditorOverlay(this);
220
    d->m_refactorOverlay = new RefactorOverlay(this);
221

con's avatar
con committed
222 223 224 225 226 227 228 229 230 231
    d->setupDocumentSignals(d->m_document);

    d->m_lastScrollPos = -1;

    // from RESEARCH

    setLayoutDirection(Qt::LeftToRight);
    viewport()->setMouseTracking(true);
    d->extraAreaSelectionAnchorBlockNumber
        = d->extraAreaToggleMarkBlockNumber
mae's avatar
mae committed
232
        = d->extraAreaHighlightFoldedBlockNumber
con's avatar
con committed
233 234
        = -1;

mae's avatar
mae committed
235
    d->visibleFoldedBlockNumber = d->suggestedVisibleFoldedBlockNumber = -1;
con's avatar
con committed
236

237 238
    connect(d->m_codeAssistant.data(), SIGNAL(finished()), this, SIGNAL(assistFinished()));

con's avatar
con committed
239 240 241
    connect(this, SIGNAL(blockCountChanged(int)), this, SLOT(slotUpdateExtraAreaWidth()));
    connect(this, SIGNAL(modificationChanged(bool)), this, SLOT(slotModificationChanged(bool)));
    connect(this, SIGNAL(cursorPositionChanged()), this, SLOT(slotCursorPositionChanged()));
Robert Loehning's avatar
Robert Loehning committed
242
    connect(this, SIGNAL(updateRequest(QRect,int)), this, SLOT(slotUpdateRequest(QRect,int)));
con's avatar
con committed
243 244 245 246 247 248
    connect(this, SIGNAL(selectionChanged()), this, SLOT(slotSelectionChanged()));

//     (void) new QShortcut(tr("CTRL+L"), this, SLOT(centerCursor()), 0, Qt::WidgetShortcut);
//     (void) new QShortcut(tr("F9"), this, SLOT(slotToggleMark()), 0, Qt::WidgetShortcut);
//     (void) new QShortcut(tr("F11"), this, SLOT(slotToggleBlockVisible()));

249 250 251 252
#ifdef DO_FOO
    (void) new QShortcut(tr("CTRL+D"), this, SLOT(doFoo()));
#endif

con's avatar
con committed
253 254 255 256

    // parentheses matcher
    d->m_formatRange = true;
    d->m_matchFormat.setForeground(Qt::red);
257
    d->m_matchFormat.setBackground(QColor(0xb4, 0xee, 0xb4));
con's avatar
con committed
258 259 260 261 262
    d->m_mismatchFormat.setBackground(Qt::magenta);
    d->m_parenthesesMatchingTimer = new QTimer(this);
    d->m_parenthesesMatchingTimer->setSingleShot(true);
    connect(d->m_parenthesesMatchingTimer, SIGNAL(timeout()), this, SLOT(_q_matchParentheses()));

263 264 265 266
    d->m_highlightBlocksTimer = new QTimer(this);
    d->m_highlightBlocksTimer->setSingleShot(true);
    connect(d->m_highlightBlocksTimer, SIGNAL(timeout()), this, SLOT(_q_highlightBlocks()));

267
    d->m_animator = 0;
con's avatar
con committed
268 269 270 271

    d->m_searchResultFormat.setBackground(QColor(0xffef0b));

    slotUpdateExtraAreaWidth();
con's avatar
con committed
272
    updateHighlights();
con's avatar
con committed
273 274
    setFrameStyle(QFrame::NoFrame);

275 276 277 278
    d->m_delayedUpdateTimer = new QTimer(this);
    d->m_delayedUpdateTimer->setSingleShot(true);
    connect(d->m_delayedUpdateTimer, SIGNAL(timeout()), viewport(), SLOT(update()));

mae's avatar
mae committed
279
    d->m_moveLineUndoHack = false;
con's avatar
con committed
280 281
}

282
BaseTextEditorWidget::~BaseTextEditorWidget()
con's avatar
con committed
283 284 285 286 287
{
    delete d;
    d = 0;
}

288
QString BaseTextEditorWidget::mimeType() const
con's avatar
con committed
289 290 291 292
{
    return d->m_document->mimeType();
}

293
void BaseTextEditorWidget::setMimeType(const QString &mt)
con's avatar
con committed
294 295 296 297
{
    d->m_document->setMimeType(mt);
}

298
void BaseTextEditorWidget::print(QPrinter *printer)
con's avatar
con committed
299 300 301 302 303
{
    const bool oldFullPage =  printer->fullPage();
    printer->setFullPage(true);
    QPrintDialog *dlg = new QPrintDialog(printer, this);
    dlg->setWindowTitle(tr("Print Document"));
304
    if (dlg->exec() == QDialog::Accepted)
con's avatar
con committed
305 306 307 308 309
        d->print(printer);
    printer->setFullPage(oldFullPage);
    delete dlg;
}

mae's avatar
mae committed
310
static int foldBoxWidth(const QFontMetrics &fm)
311 312 313 314 315
{
    const int lineSpacing = fm.lineSpacing();
    return lineSpacing + lineSpacing%2 + 1;
}

con's avatar
con committed
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
static void printPage(int index, QPainter *painter, const QTextDocument *doc,
                      const QRectF &body, const QRectF &titleBox,
                      const QString &title)
{
    painter->save();

    painter->translate(body.left(), body.top() - (index - 1) * body.height());
    QRectF view(0, (index - 1) * body.height(), body.width(), body.height());

    QAbstractTextDocumentLayout *layout = doc->documentLayout();
    QAbstractTextDocumentLayout::PaintContext ctx;

    painter->setFont(QFont(doc->defaultFont()));
    QRectF box = titleBox.translated(0, view.top());
    int dpix = painter->device()->logicalDpiX();
    int dpiy = painter->device()->logicalDpiY();
    int mx = 5 * dpix / 72.0;
    int my = 2 * dpiy / 72.0;
    painter->fillRect(box.adjusted(-mx, -my, mx, my), QColor(210, 210, 210));
    if (!title.isEmpty())
        painter->drawText(box, Qt::AlignCenter, title);
    const QString pageString = QString::number(index);
    painter->drawText(box, Qt::AlignRight, pageString);

    painter->setClipRect(view);
    ctx.clip = view;
    // don't use the system palette text as default text color, on HP/UX
    // for example that's white, and white text on white paper doesn't
    // look that nice
    ctx.palette.setColor(QPalette::Text, Qt::black);

    layout->draw(painter, ctx);

    painter->restore();
}

352
void BaseTextEditorWidgetPrivate::print(QPrinter *printer)
con's avatar
con committed
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
{
    QTextDocument *doc = q->document();

    QString title = q->displayName();
    if (title.isEmpty())
        printer->setDocName(title);


    QPainter p(printer);

    // Check that there is a valid device to print to.
    if (!p.isActive())
        return;

    doc = doc->clone(doc);

    QTextOption opt = doc->defaultTextOption();
    opt.setWrapMode(QTextOption::WrapAtWordBoundaryOrAnywhere);
    doc->setDefaultTextOption(opt);

    (void)doc->documentLayout(); // make sure that there is a layout


    QColor background = q->palette().color(QPalette::Base);
    bool backgroundIsDark = background.value() < 128;

    for (QTextBlock srcBlock = q->document()->firstBlock(), dstBlock = doc->firstBlock();
         srcBlock.isValid() && dstBlock.isValid();
         srcBlock = srcBlock.next(), dstBlock = dstBlock.next()) {


        QList<QTextLayout::FormatRange> formatList = srcBlock.layout()->additionalFormats();
        if (backgroundIsDark) {
            // adjust syntax highlighting colors for better contrast
            for (int i = formatList.count() - 1; i >=0; --i) {
                QTextCharFormat &format = formatList[i].format;
                if (format.background().color() == background) {
                    QBrush brush = format.foreground();
                    QColor color = brush.color();
                    int h,s,v,a;
                    color.getHsv(&h, &s, &v, &a);
                    color.setHsv(h, s, qMin(128, v), a);
                    brush.setColor(color);
                    format.setForeground(brush);
                }
                format.setBackground(Qt::white);
            }
        }

        dstBlock.layout()->setAdditionalFormats(formatList);
    }

    QAbstractTextDocumentLayout *layout = doc->documentLayout();
    layout->setPaintDevice(p.device());

    int dpiy = p.device()->logicalDpiY();
    int margin = (int) ((2/2.54)*dpiy); // 2 cm margins

    QTextFrameFormat fmt = doc->rootFrame()->frameFormat();
    fmt.setMargin(margin);
    doc->rootFrame()->setFrameFormat(fmt);

    QRectF pageRect(printer->pageRect());
    QRectF body = QRectF(0, 0, pageRect.width(), pageRect.height());
    QFontMetrics fontMetrics(doc->defaultFont(), p.device());

    QRectF titleBox(margin,
                    body.top() + margin
                    - fontMetrics.height()
                    - 6 * dpiy / 72.0,
                    body.width() - 2*margin,
                    fontMetrics.height());
    doc->setPageSize(body.size());

    int docCopies;
    int pageCopies;
    if (printer->collateCopies() == true){
        docCopies = 1;
        pageCopies = printer->numCopies();
    } else {
        docCopies = printer->numCopies();
        pageCopies = 1;
    }

    int fromPage = printer->fromPage();
    int toPage = printer->toPage();
    bool ascending = true;

    if (fromPage == 0 && toPage == 0) {
        fromPage = 1;
        toPage = doc->pageCount();
    }
    // paranoia check
    fromPage = qMax(1, fromPage);
    toPage = qMin(doc->pageCount(), toPage);

    if (printer->pageOrder() == QPrinter::LastPageFirst) {
        int tmp = fromPage;
        fromPage = toPage;
        toPage = tmp;
        ascending = false;
    }

    for (int i = 0; i < docCopies; ++i) {

        int page = fromPage;
        while (true) {
            for (int j = 0; j < pageCopies; ++j) {
                if (printer->printerState() == QPrinter::Aborted
                    || printer->printerState() == QPrinter::Error)
                    goto UserCanceled;
                printPage(page, &p, doc, body, titleBox, title);
                if (j < pageCopies - 1)
                    printer->newPage();
            }

            if (page == toPage)
                break;

            if (ascending)
                ++page;
            else
                --page;

            printer->newPage();
        }

        if ( i < docCopies - 1)
            printer->newPage();
    }

UserCanceled:
    delete doc;
}


489
int BaseTextEditorWidgetPrivate::visualIndent(const QTextBlock &block) const
490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505
{
    if (!block.isValid())
        return 0;
    const QTextDocument *document = block.document();
    int i = 0;
    while (i < block.length()) {
        if (!document->characterAt(block.position() + i).isSpace()) {
            QTextCursor cursor(block);
            cursor.setPosition(block.position() + i);
            return q->cursorRect(cursor).x();
        }
        ++i;
    }

    return 0;
}
con's avatar
con committed
506

507
ITextMarkable *BaseTextEditorWidget::markableInterface() const
con's avatar
con committed
508 509 510 511
{
    return baseTextDocument()->documentMarker();
}

512
BaseTextEditor *BaseTextEditorWidget::editor() const
con's avatar
con committed
513
{
514
    if (!d->m_editor) {
Leandro Melo's avatar
Leandro Melo committed
515 516
        d->m_editor = const_cast<BaseTextEditorWidget *>(this)->createEditor();
        d->m_codeAssistant->configure(d->m_editor);
con's avatar
con committed
517
        connect(this, SIGNAL(textChanged()),
518
                d->m_editor, SIGNAL(contentsChanged()));
con's avatar
con committed
519
        connect(this, SIGNAL(changed()),
520
                d->m_editor, SIGNAL(changed()));
con's avatar
con committed
521
    }
522
    return d->m_editor;
con's avatar
con committed
523 524 525
}


526
void BaseTextEditorWidget::selectEncoding()
con's avatar
con committed
527
{
528
    BaseTextDocument *doc = d->m_document.data();
con's avatar
con committed
529 530 531
    CodecSelector codecSelector(this, doc);

    switch (codecSelector.exec()) {
532 533 534 535 536 537 538
    case CodecSelector::Reload: {
        QString errorString;
        if (!doc->reload(&errorString, codecSelector.selectedCodec())) {
            QMessageBox::critical(this, tr("File Error"), errorString);
            break;
        }
        break; }
con's avatar
con committed
539 540
    case CodecSelector::Save:
        doc->setCodec(codecSelector.selectedCodec());
541
        Core::EditorManager::instance()->saveEditor(editor());
542
        updateTextCodecLabel();
con's avatar
con committed
543 544 545 546 547 548
        break;
    case CodecSelector::Cancel:
        break;
    }
}

549 550 551 552 553
void BaseTextEditorWidget::updateTextCodecLabel()
{
    editor()->setFileEncodingLabelText(QString::fromLatin1(d->m_document->codec()->name()));
}

554
QString BaseTextEditorWidget::msgTextTooLarge(quint64 size)
555 556 557 558 559
{
    return tr("The text is too large to be displayed (%1 MB).").
           arg(size >> 20);
}

560
bool BaseTextEditorWidget::createNew(const QString &contents)
con's avatar
con committed
561
{
562 563 564 565 566
    if (contents.size() > Core::EditorManager::maxTextFileSize()) {
        setPlainText(msgTextTooLarge(contents.size()));
        document()->setModified(false);
        return false;
    }
con's avatar
con committed
567 568 569 570 571
    setPlainText(contents);
    document()->setModified(false);
    return true;
}

572 573 574 575
void BaseTextEditorWidget::updateCannotDecodeInfo()
{
    setReadOnly(d->m_document->hasDecodingError());
    if (d->m_document->hasDecodingError()) {
Orgad Shaneh's avatar
Orgad Shaneh committed
576
        Core::InfoBarEntry info(Core::Id(Constants::SELECT_ENCODING),
577 578 579 580 581
            tr("<b>Error:</b> Could not decode \"%1\" with \"%2\"-encoding. Editing not possible.")
            .arg(displayName()).arg(QString::fromLatin1(d->m_document->codec()->name())));
        info.setCustomButtonInfo(tr("Select Encoding"), this, SLOT(selectEncoding()));
        d->m_document->infoBar()->addInfo(info);
    } else {
Orgad Shaneh's avatar
Orgad Shaneh committed
582
        d->m_document->infoBar()->removeInfo(Core::Id(Constants::SELECT_ENCODING));
583 584 585
    }
}

586
bool BaseTextEditorWidget::open(QString *errorString, const QString &fileName, const QString &realFileName)
con's avatar
con committed
587
{
588
    if (d->m_document->open(errorString, fileName, realFileName)) {
con's avatar
con committed
589
        moveCursor(QTextCursor::Start);
590
        updateCannotDecodeInfo();
591 592 593 594 595 596 597
        if (editor()->m_fileEncodingLabel) {
            connect(editor()->m_fileEncodingLabel, SIGNAL(clicked()), this,
                    SLOT(selectEncoding()), Qt::UniqueConnection);
            connect(d->m_document->document(), SIGNAL(modificationChanged(bool)), this,
                    SLOT(updateTextCodecLabel()), Qt::UniqueConnection);
            updateTextCodecLabel();
        }
con's avatar
con committed
598 599 600 601 602
        return true;
    }
    return false;
}

603 604 605
/*
  Collapses the first comment in a file, if there is only whitespace above
  */
606
void BaseTextEditorWidgetPrivate::foldLicenseHeader()
607 608
{
    QTextDocument *doc = q->document();
609
    BaseTextDocumentLayout *documentLayout = qobject_cast<BaseTextDocumentLayout*>(doc->documentLayout());
610 611 612
    QTC_ASSERT(documentLayout, return);
    QTextBlock block = doc->firstBlock();
    const TabSettings &ts = m_document->tabSettings();
613
    while (block.isValid() && block.isVisible()) {
614
        QString text = block.text();
mae's avatar
mae committed
615 616 617 618 619 620 621 622 623
        if (BaseTextDocumentLayout::canFold(block) && block.next().isVisible()) {
            if (text.trimmed().startsWith(QLatin1String("/*"))) {
                BaseTextDocumentLayout::doFoldOrUnfold(block, false);
                moveCursorVisible();
                documentLayout->requestUpdate();
                documentLayout->emitDocumentSizeChanged();
                break;
            }
        }
624 625 626 627 628 629
        if (ts.firstNonSpace(text) < text.size())
            break;
        block = block.next();
    }
}

630
const Utils::ChangeSet &BaseTextEditorWidget::changeSet() const
631 632 633 634
{
    return d->m_changeSet;
}

635
void BaseTextEditorWidget::setChangeSet(const Utils::ChangeSet &changeSet)
636
{
Roberto Raggi's avatar
Roberto Raggi committed
637 638
    using namespace Utils;

639
    d->m_changeSet = changeSet;
Roberto Raggi's avatar
Roberto Raggi committed
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

    foreach (const ChangeSet::EditOp &op, changeSet.operationList()) {
        // ### TODO: process the edit operation

        switch (op.type) {
        case ChangeSet::EditOp::Replace:
            break;

        case ChangeSet::EditOp::Move:
            break;

        case ChangeSet::EditOp::Insert:
            break;

        case ChangeSet::EditOp::Remove:
            break;

        case ChangeSet::EditOp::Flip:
            break;

        case ChangeSet::EditOp::Copy:
            break;

        default:
            break;
        } // switch
    }
667 668
}

669
Core::IDocument *BaseTextEditorWidget::editorDocument() const
con's avatar
con committed
670
{
671
    return d->m_document.data();
con's avatar
con committed
672 673
}

674
void BaseTextEditorWidget::editorContentsChange(int position, int charsRemoved, int charsAdded)
con's avatar
con committed
675
{
676 677 678
    if (d->m_animator)
        d->m_animator->finish();

con's avatar
con committed
679
    d->m_contentsChanged = true;
680
    QTextDocument *doc = document();
681
    BaseTextDocumentLayout *documentLayout = static_cast<BaseTextDocumentLayout*>(doc->documentLayout());
con's avatar
con committed
682 683 684

    // Keep the line numbers and the block information for the text marks updated
    if (charsRemoved != 0) {
685 686
        documentLayout->updateMarksLineNumber();
        documentLayout->updateMarksBlock(document()->findBlock(position));
con's avatar
con committed
687
    } else {
688 689
        const QTextBlock posBlock = doc->findBlock(position);
        const QTextBlock nextBlock = doc->findBlock(position + charsAdded);
con's avatar
con committed
690
        if (posBlock != nextBlock) {
691 692 693
            documentLayout->updateMarksLineNumber();
            documentLayout->updateMarksBlock(posBlock);
            documentLayout->updateMarksBlock(nextBlock);
con's avatar
con committed
694
        } else {
695
            documentLayout->updateMarksBlock(posBlock);
con's avatar
con committed
696 697
        }
    }
698

699 700 701
    if (d->m_snippetOverlay->isVisible()) {
        QTextCursor cursor = textCursor();
        cursor.setPosition(position);
702
        d->snippetCheckCursor(cursor);
703 704
    }

705
    if (doc->isRedoAvailable())
706
        emit editor()->contentsChangedBecauseOfUndo();
Leandro Melo's avatar
Leandro Melo committed
707

708
    if (charsAdded != 0 && document()->characterAt(position + charsAdded - 1).isPrint())
Leandro Melo's avatar
Leandro Melo committed
709
        d->m_assistRelevantContentAdded = true;
con's avatar
con committed
710 711
}

712
void BaseTextEditorWidget::slotSelectionChanged()
con's avatar
con committed
713
{
mae's avatar
mae committed
714 715 716
    if (d->m_inBlockSelectionMode && !textCursor().hasSelection()) {
        d->m_inBlockSelectionMode = false;
        d->m_blockSelection.clear();
con's avatar
con committed
717
        viewport()->update();
mae's avatar
mae committed
718 719
    }

720 721
    if (!d->m_selectBlockAnchor.isNull() && !textCursor().hasSelection())
        d->m_selectBlockAnchor = QTextCursor();
722 723 724

    // Clear any link which might be showing when the selection changes
    clearLink();
con's avatar
con committed
725 726
}

727
void BaseTextEditorWidget::gotoBlockStart()
728 729
{
    QTextCursor cursor = textCursor();
730
    if (TextBlockUserData::findPreviousOpenParenthesis(&cursor, false)) {
731
        setTextCursor(cursor);
732 733
        _q_matchParentheses();
    }
734 735
}

736
void BaseTextEditorWidget::gotoBlockEnd()
737 738
{
    QTextCursor cursor = textCursor();
739
    if (TextBlockUserData::findNextClosingParenthesis(&cursor, false)) {
740
        setTextCursor(cursor);
741 742
        _q_matchParentheses();
    }
743 744
}

745
void BaseTextEditorWidget::gotoBlockStartWithSelection()
746 747
{
    QTextCursor cursor = textCursor();
748
    if (TextBlockUserData::findPreviousOpenParenthesis(&cursor, true)) {
749
        setTextCursor(cursor);
750 751
        _q_matchParentheses();
    }
752 753
}

754
void BaseTextEditorWidget::gotoBlockEndWithSelection()
755 756
{
    QTextCursor cursor = textCursor();
757
    if (TextBlockUserData::findNextClosingParenthesis(&cursor, true)) {
758
        setTextCursor(cursor);
759 760 761 762
        _q_matchParentheses();
    }
}

mae's avatar
mae committed
763

764
void BaseTextEditorWidget::gotoLineStart()
mae's avatar
mae committed
765 766 767 768
{
    handleHomeKey(false);
}

769
void BaseTextEditorWidget::gotoLineStartWithSelection()
mae's avatar
mae committed
770 771 772 773
{
    handleHomeKey(true);
}

774
void BaseTextEditorWidget::gotoLineEnd()
mae's avatar
mae committed
775 776 777 778
{
    moveCursor(QTextCursor::EndOfLine);
}

779
void BaseTextEditorWidget::gotoLineEndWithSelection()
mae's avatar
mae committed
780 781 782 783
{
    moveCursor(QTextCursor::EndOfLine, QTextCursor::KeepAnchor);
}

784
void BaseTextEditorWidget::gotoNextLine()
mae's avatar
mae committed
785
{
786
    moveCursor(QTextCursor::Down);
mae's avatar
mae committed
787 788
}

789
void BaseTextEditorWidget::gotoNextLineWithSelection()
mae's avatar
mae committed
790
{
791
    moveCursor(QTextCursor::Down, QTextCursor::KeepAnchor);
mae's avatar
mae committed
792 793
}

794
void BaseTextEditorWidget::gotoPreviousLine()
mae's avatar
mae committed
795
{
796
    moveCursor(QTextCursor::Up);
mae's avatar
mae committed
797 798
}

799
void BaseTextEditorWidget::gotoPreviousLineWithSelection()
mae's avatar
mae committed
800
{
801
    moveCursor(QTextCursor::Up, QTextCursor::KeepAnchor);
mae's avatar
mae committed
802 803
}

804
void BaseTextEditorWidget::gotoPreviousCharacter()
mae's avatar
mae committed
805 806 807 808
{
    moveCursor(QTextCursor::PreviousCharacter);
}

809
void BaseTextEditorWidget::gotoPreviousCharacterWithSelection()
mae's avatar
mae committed
810 811 812 813
{
    moveCursor(QTextCursor::PreviousCharacter, QTextCursor::KeepAnchor);
}

814
void BaseTextEditorWidget::gotoNextCharacter()
mae's avatar
mae committed
815 816 817 818
{
    moveCursor(QTextCursor::NextCharacter);
}

819
void BaseTextEditorWidget::gotoNextCharacterWithSelection()
mae's avatar
mae committed
820 821 822 823
{
    moveCursor(QTextCursor::NextCharacter, QTextCursor::KeepAnchor);
}

824
void BaseTextEditorWidget::gotoPreviousWord()
mae's avatar
mae committed
825 826
{
    moveCursor(QTextCursor::PreviousWord);
827
    setTextCursor(textCursor());
mae's avatar
mae committed
828 829
}

830
void BaseTextEditorWidget::gotoPreviousWordWithSelection()
mae's avatar
mae committed
831 832
{
    moveCursor(QTextCursor::PreviousWord, QTextCursor::KeepAnchor);
833
    setTextCursor(textCursor());
mae's avatar
mae committed
834 835
}

836
void BaseTextEditorWidget::gotoNextWord()
mae's avatar
mae committed
837 838
{
    moveCursor(QTextCursor::NextWord);
839
    setTextCursor(textCursor());
mae's avatar
mae committed
840 841
}

842
void BaseTextEditorWidget::gotoNextWordWithSelection()
mae's avatar
mae committed
843 844
{
    moveCursor(QTextCursor::NextWord, QTextCursor::KeepAnchor);
845
    setTextCursor(textCursor());
mae's avatar
mae committed
846 847
}

848
void BaseTextEditorWidget::gotoPreviousWordCamelCase()
mae's avatar
mae committed
849 850 851 852 853 854
{
    QTextCursor c = textCursor();
    camelCaseLeft(c, QTextCursor::MoveAnchor);
    setTextCursor(c);
}

855
void BaseTextEditorWidget::gotoPreviousWordCamelCaseWithSelection()
mae's avatar
mae committed
856 857 858 859 860 861
{
    QTextCursor c = textCursor();
    camelCaseLeft(c, QTextCursor::KeepAnchor);
    setTextCursor(c);
}

862
void BaseTextEditorWidget::gotoNextWordCamelCase()
mae's avatar
mae committed
863 864 865 866 867 868
{
    QTextCursor c = textCursor();
    camelCaseRight(c, QTextCursor::MoveAnchor);
    setTextCursor(c);
}

869
void BaseTextEditorWidget::gotoNextWordCamelCaseWithSelection()
mae's avatar
mae committed
870 871 872 873 874 875
{
    QTextCursor c = textCursor();
    camelCaseRight(c, QTextCursor::KeepAnchor);
    setTextCursor(c);
}

876 877
static QTextCursor flippedCursor(const QTextCursor &cursor)
{
878 879 880 881
    QTextCursor flipped = cursor;
    flipped.clearSelection();
    flipped.setPosition(cursor.anchor(), QTextCursor::KeepAnchor);
    return flipped;
882 883
}

884
bool BaseTextEditorWidget::selectBlockUp()
885 886 887 888 889 890 891 892
{
    QTextCursor cursor = textCursor();
    if (!cursor.hasSelection())
        d->m_selectBlockAnchor = cursor;
    else
        cursor.setPosition(cursor.selectionStart());

    if (!TextBlockUserData::findPreviousOpenParenthesis(&cursor, false))
893
        return false;
894
    if (!TextBlockUserData::findNextClosingParenthesis(&cursor, true))
895 896
        return false;

897 898
    setTextCursor(flippedCursor(cursor));
    _q_matchParentheses();
899
    return true;
900 901
}

902
bool BaseTextEditorWidget::selectBlockDown()
903 904 905 906 907
{
    QTextCursor tc = textCursor();
    QTextCursor cursor = d->m_selectBlockAnchor;

    if (!tc.hasSelection() || cursor.isNull())
908
        return false;
909 910 911 912 913 914 915 916 917 918 919 920 921
    tc.setPosition(tc.selectionStart());

    forever {
        QTextCursor ahead = cursor;
        if (!TextBlockUserData::findPreviousOpenParenthesis(&ahead, false))
            break;
        if (ahead.position() <= tc.position())
            break;
        cursor = ahead;
    }
    if ( cursor != d->m_selectBlockAnchor)
        TextBlockUserData::findNextClosingParenthesis(&cursor, true);

922 923
    setTextCursor(flippedCursor(cursor));
    _q_matchParentheses();
924
    return true;
925 926
}

927
void BaseTextEditorWidget::copyLineUp()
928 929 930 931
{
    copyLineUpDown(true);
}

932
void BaseTextEditorWidget::copyLineDown()
933 934 935 936
{
    copyLineUpDown(false);
}

937
// @todo: Potential reuse of some code around the following functions...
938
void BaseTextEditorWidget::copyLineUpDown(bool up)
939 940 941 942 943 944 945 946 947 948 949
{
    QTextCursor cursor = textCursor();
    QTextCursor move = cursor;
    move.beginEditBlock();

    bool hasSelection = cursor.hasSelection();

    if (hasSelection) {
        move.setPosition(cursor.selectionStart());
        move.movePosition(QTextCursor::StartOfBlock);
        move.setPosition(cursor.selectionEnd(), QTextCursor::KeepAnchor);
950 951
        move.movePosition(move.atBlockStart() ? QTextCursor::Left: QTextCursor::EndOfBlock,
                          QTextCursor::KeepAnchor);
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
    } else {
        move.movePosition(QTextCursor::StartOfBlock);
        move.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
    }

    QString text = move.selectedText();

    if (up) {
        move.setPosition(cursor.selectionStart());
        move.movePosition(QTextCursor::StartOfBlock);
        move.insertBlock();
        move.movePosition(QTextCursor::Left);
    } else {
        move.movePosition(QTextCursor::EndOfBlock);
        if (move.atBlockStart()) {
            move.movePosition(QTextCursor::NextBlock);
            move.insertBlock();
            move.movePosition(QTextCursor::Left);
        } else {
            move.insertBlock();
        }
    }

    int start = move.position();
    move.clearSelection();
    move.insertText(text);
    int end = move.position();

    move.setPosition(start);
    move.setPosition(end, QTextCursor::KeepAnchor);

    indent(document(), move, QChar::Null);
    move.endEditBlock();

    setTextCursor(move);
}

989
void BaseTextEditorWidget::joinLines()
990
{
991 992 993
    QTextCursor cursor = textCursor();
    QTextCursor start = cursor;
    QTextCursor end = cursor;
994

995 996
    start.setPosition(cursor.selectionStart());
    end.setPosition(cursor.selectionEnd() - 1);
997

998
    int lineCount = qMax(1, end.blockNumber() - start.blockNumber());
999

1000 1001 1002 1003 1004 1005 1006
    cursor.beginEditBlock();
    cursor.setPosition(cursor.selectionStart());
    while (lineCount--) {
        cursor.movePosition(QTextCursor::NextBlock);
        cursor.movePosition(QTextCursor::StartOfBlock);
        cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::KeepAnchor);
        QString cutLine = cursor.selectedText();
1007

1008
        // Collapse leading whitespaces to one or insert whitespace
1009
        cutLine.replace(QRegExp(QLatin1String("^\\s*")), QLatin1String(" "));
1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
        cursor.movePosition(QTextCursor::Right, QTextCursor::KeepAnchor);
        cursor.removeSelectedText();

        cursor.movePosition(QTextCursor::PreviousBlock);
        cursor.movePosition(QTextCursor::EndOfBlock);

        cursor.insertText(cutLine);
    }
    cursor.endEditBlock();

    setTextCursor(cursor);
1021 1022
}

1023
void BaseTextEditorWidget::insertLineAbove()
1024 1025 1026
{
    QTextCursor cursor = textCursor();
    cursor.beginEditBlock();
1027 1028 1029
    // If the cursor is at the beginning of the document,
    // it should still insert a line above the current line.
    cursor.movePosition(QTextCursor::StartOfBlock, QTextCursor::MoveAnchor);
1030
    cursor.insertBlock();
1031
    cursor.movePosition(QTextCursor::PreviousBlock, QTextCursor::MoveAnchor);
1032 1033 1034 1035 1036
    indent(document(), cursor, QChar::Null);
    cursor.endEditBlock();
    setTextCursor(cursor);
}

1037
void BaseTextEditorWidget::insertLineBelow()
1038 1039 1040 1041 1042 1043 1044 1045 1046 1047
{
    QTextCursor cursor = textCursor();
    cursor.beginEditBlock();
    cursor.movePosition(QTextCursor::EndOfBlock, QTextCursor::MoveAnchor);
    cursor.insertBlock();
    indent(document(), cursor, QChar::Null);
    cursor.endEditBlock();
    setTextCursor(cursor);
}

1048
void BaseTextEditorWidget::moveLineUp()
1049 1050 1051 1052
{
    moveLineUpDown(true);
}

1053
void BaseTextEditorWidget::moveLineDown()
1054 1055 1056 1057
{
    moveLineUpDown(false);
}

1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068
void BaseTextEditorWidget::uppercaseSelection()
{
    transformSelection(&QString::toUpper);
}


void BaseTextEditorWidget::lowercaseSelection()
{
    transformSelection(&QString::toLower);
}

1069 1070 1071 1072 1073 1074 1075 1076 1077 1078
void BaseTextEditorWidget::indent()
{
    indentOrUnindent(true);
}

void BaseTextEditorWidget::unindent()
{
    indentOrUnindent(false);
}

1079 1080
void BaseTextEditorWidget::openLinkUnderCursor()
{
1081 1082
    L