q3textedit.cpp

奇趣公司比较新的qt/emd版本

            break;

        case Qt::ControlButton:
        case Qt::ControlButton|Qt::ShiftButton:
        case Qt::ControlButton|Qt::Keypad:
        case Qt::ControlButton|Qt::ShiftButton|Qt::Keypad:
            switch (ke->key()) {
            case Qt::Key_Tab:
            case Qt::Key_Backtab:
                ke->ignore();
                break;
// Those are too frequently used for application functionality
/*            case Qt::Key_A:
            case Qt::Key_B:
            case Qt::Key_D:
            case Qt::Key_E:
            case Qt::Key_F:
            case Qt::Key_H:
            case Qt::Key_I:
            case Qt::Key_K:
            case Qt::Key_N:
            case Qt::Key_P:
            case Qt::Key_T:
*/
            case Qt::Key_C:
            case Qt::Key_V:
            case Qt::Key_X:
            case Qt::Key_Y:
            case Qt::Key_Z:
            case Qt::Key_Left:
            case Qt::Key_Right:
            case Qt::Key_Up:
            case Qt::Key_Down:
            case Qt::Key_Home:
            case Qt::Key_End:
#if defined (Q_WS_WIN)
            case Qt::Key_Insert:
            case Qt::Key_Delete:
#endif
                ke->accept();
            default:
                break;
            }
            break;

        default:
            switch (ke->key()) {
#if defined (Q_WS_WIN)
            case Qt::Key_Insert:
                ke->accept();
#endif
            default:
                break;
            }
            break;
        }
    }

    if (e->type() == QEvent::Show) {
        if (
#ifdef QT_TEXTEDIT_OPTIMIZATION
             !d->optimMode &&
#endif
             d->ensureCursorVisibleInShowEvent ) {
            ensureCursorVisible();
            d->ensureCursorVisibleInShowEvent = false;
        }
        if (!d->scrollToAnchor.isEmpty()) {
            scrollToAnchor(d->scrollToAnchor);
            d->scrollToAnchor.clear();
        }
    }
    return QWidget::event(e);
}

/*!
    Processes the key event, \a e. By default key events are used to
    provide keyboard navigation and text editing.
*/

void Q3TextEdit::keyPressEvent(QKeyEvent *e)
{
    changeIntervalTimer->stop();
    interval = 10;
    bool unknownKey = false;
    if (isReadOnly()) {
        if (!handleReadOnlyKeyEvent(e))
            Q3ScrollView::keyPressEvent(e);
        changeIntervalTimer->start(100, true);
        return;
    }


    bool selChanged = false;
    for (int i = 1; i < doc->numSelections(); ++i) // start with 1 as we don't want to remove the Standard-Selection
        selChanged = doc->removeSelection(i) || selChanged;

    if (selChanged) {
        cursor->paragraph()->document()->nextDoubleBuffered = true;
        repaintChanged();
    }

    bool clearUndoRedoInfo = true;


    switch (e->key()) {
    case Qt::Key_Left:
    case Qt::Key_Right: {
        // a bit hacky, but can't change this without introducing new enum values for move and keeping the
        // correct semantics and movement for BiDi and non BiDi text.
        CursorAction a;
        if (cursor->paragraph()->string()->isRightToLeft() == (e->key() == Qt::Key_Right))
            a = e->state() & Qt::ControlButton ? MoveWordBackward : MoveBackward;
        else
            a = e->state() & Qt::ControlButton ? MoveWordForward : MoveForward;
        moveCursor(a, e->state() & Qt::ShiftButton);
        break;
    }
    case Qt::Key_Up:
        moveCursor(e->state() & Qt::ControlButton ? MovePgUp : MoveUp, e->state() & Qt::ShiftButton);
        break;
    case Qt::Key_Down:
        moveCursor(e->state() & Qt::ControlButton ? MovePgDown : MoveDown, e->state() & Qt::ShiftButton);
        break;
    case Qt::Key_Home:
        moveCursor(e->state() & Qt::ControlButton ? MoveHome : MoveLineStart, e->state() & Qt::ShiftButton);
        break;
    case Qt::Key_End:
        moveCursor(e->state() & Qt::ControlButton ? MoveEnd : MoveLineEnd, e->state() & Qt::ShiftButton);
        break;
    case Qt::Key_Prior:
        moveCursor(MovePgUp, e->state() & Qt::ShiftButton);
        break;
    case Qt::Key_Next:
        moveCursor(MovePgDown, e->state() & Qt::ShiftButton);
        break;
    case Qt::Key_Return: case Qt::Key_Enter:
        if (doc->hasSelection(Q3TextDocument::Standard, false))
            removeSelectedText();
        if (textFormat() == Qt::RichText && (e->state() & Qt::ControlButton)) {
            // Ctrl-Enter inserts a line break in rich text mode
            insert(QString(QChar(QChar::LineSeparator)), true, false);
        } else {
#ifndef QT_NO_CURSOR
            viewport()->setCursor(isReadOnly() ? Qt::ArrowCursor : Qt::IBeamCursor);
#endif
            clearUndoRedoInfo = false;
            doKeyboardAction(ActionReturn);
            emit returnPressed();
        }
        break;
    case Qt::Key_Delete:
#if defined (Q_WS_WIN)
        if (e->state() & Qt::ShiftButton) {
            cut();
            break;
        } else
#endif
        if (doc->hasSelection(Q3TextDocument::Standard, true)) {
            removeSelectedText();
            break;
        }
        doKeyboardAction(e->state() & Qt::ControlButton ? ActionWordDelete
                          : ActionDelete);
        clearUndoRedoInfo = false;

        break;
    case Qt::Key_Insert:
        if (e->state() & Qt::ShiftButton)
            paste();
#if defined (Q_WS_WIN)
        else if (e->state() & Qt::ControlButton)
            copy();
#endif
        else
            setOverwriteMode(!isOverwriteMode());
        break;
    case Qt::Key_Backspace:
#if defined (Q_WS_WIN)
        if (e->state() & Qt::AltButton) {
            if (e->state() & Qt::ControlButton) {
                break;
            } else if (e->state() & Qt::ShiftButton) {
                redo();
                break;
            } else {
                undo();
                break;
            }
        } else
#endif
        if (doc->hasSelection(Q3TextDocument::Standard, true)) {
            removeSelectedText();
            break;
        }

        doKeyboardAction(e->state() & Qt::ControlButton ? ActionWordBackspace
                          : ActionBackspace);
        clearUndoRedoInfo = false;
        break;
    case Qt::Key_F16: // Copy key on Sun keyboards
        copy();
        break;
    case Qt::Key_F18:  // Paste key on Sun keyboards
        paste();
        break;
    case Qt::Key_F20:  // Cut key on Sun keyboards
        cut();
        break;
    case Qt::Key_Direction_L:
        if (doc->textFormat() == Qt::PlainText) {
            // change the whole doc
            Q3TextParagraph *p = doc->firstParagraph();
            while (p) {
                p->setDirection(QChar::DirL);
                p->setAlignment(Qt::AlignLeft);
                p->invalidate(0);
                p = p->next();
            }
        } else {
            if (!cursor->paragraph() || cursor->paragraph()->direction() == QChar::DirL)
                return;
            cursor->paragraph()->setDirection(QChar::DirL);
            if (cursor->paragraph()->length() <= 1&&
                 ((cursor->paragraph()->alignment() & (Qt::AlignLeft | Qt::AlignRight)) != 0))
                setAlignment(Qt::AlignLeft);
        }
        repaintChanged();
        break;
    case Qt::Key_Direction_R:
        if (doc->textFormat() == Qt::PlainText) {
            // change the whole doc
            Q3TextParagraph *p = doc->firstParagraph();
            while (p) {
                p->setDirection(QChar::DirR);
                p->setAlignment(Qt::AlignRight);
                p->invalidate(0);
                p = p->next();
            }
        } else {
            if (!cursor->paragraph() || cursor->paragraph()->direction() == QChar::DirR)
                return;
            cursor->paragraph()->setDirection(QChar::DirR);
            if (cursor->paragraph()->length() <= 1&&
                 ((cursor->paragraph()->alignment() & (Qt::AlignLeft | Qt::AlignRight)) != 0))
                setAlignment(Qt::AlignRight);
        }
        repaintChanged();
        break;
    default: {
            unsigned char ascii = e->text().length() ? e->text().unicode()->latin1() : 0;
            if (e->text().length() &&
                (!(e->state() & Qt::ControlButton) &&
#ifndef Q_OS_MAC
                  !(e->state() & Qt::AltButton) &&
#endif
                  !(e->state() & Qt::MetaButton) ||
                 (((e->state() & (Qt::ControlButton | Qt::AltButton))) == (Qt::ControlButton|Qt::AltButton))) &&
                 (!ascii || ascii >= 32 || e->text() == QString(QLatin1Char('\t')))) {
                clearUndoRedoInfo = false;
                if (e->key() == Qt::Key_Tab) {
                    if (d->tabChangesFocus) {
                        e->ignore();
                        break;
                    }
                    if (textFormat() == Qt::RichText && cursor->index() == 0
                         && (cursor->paragraph()->isListItem() || cursor->paragraph()->listDepth())) {
                        clearUndoRedo();
                        undoRedoInfo.type = UndoRedoInfo::Style;
                        undoRedoInfo.id = cursor->paragraph()->paragId();
                        undoRedoInfo.eid = undoRedoInfo.id;
                        undoRedoInfo.styleInformation = Q3TextStyleCommand::readStyleInformation(doc, undoRedoInfo.id, undoRedoInfo.eid);
                        cursor->paragraph()->setListDepth(cursor->paragraph()->listDepth() +1);
                        clearUndoRedo();
                        drawCursor(false);
                        repaintChanged();
                        drawCursor(true);
                        break;
                    }
                } else if (e->key() == Qt::Key_BackTab) {
                    if (d->tabChangesFocus) {
                        e->ignore();
                        break;
                    }
                }

                if ((autoFormatting() & AutoBulletList) &&
                     textFormat() == Qt::RichText && cursor->index() == 0
                     && !cursor->paragraph()->isListItem()
                     && (e->text()[0] == QLatin1Char('-') || e->text()[0] == QLatin1Char('*'))) {
                        clearUndoRedo();
                        undoRedoInfo.type = UndoRedoInfo::Style;
                        undoRedoInfo.id = cursor->paragraph()->paragId();
                        undoRedoInfo.eid = undoRedoInfo.id;
                        undoRedoInfo.styleInformation = Q3TextStyleCommand::readStyleInformation(doc, undoRedoInfo.id, undoRedoInfo.eid);
                        setParagType(Q3StyleSheetItem::DisplayListItem, Q3StyleSheetItem::ListDisc);
                        clearUndoRedo();
                        drawCursor(false);
                        repaintChanged();
                        drawCursor(true);
                        break;
                }
		if (overWrite && !cursor->atParagEnd() && !doc->hasSelection(Q3TextDocument::Standard)) {
                    doKeyboardAction(ActionDelete);
                    clearUndoRedoInfo = false;
                }
                QString t = e->text();
                insert(t, true, false);
                break;
            } else if (e->state() & Qt::ControlButton) {
                switch (e->key()) {
                case Qt::Key_C: case Qt::Key_F16: // Copy key on Sun keyboards
                    copy();
                    break;
                case Qt::Key_V:
                    paste();
                    break;
                case Qt::Key_X:
                    cut();
                    break;
                case Qt::Key_I: case Qt::Key_T: case Qt::Key_Tab:
                    if (!d->tabChangesFocus)
                        indent();
                    break;
                case Qt::Key_A:
#if defined(Q_WS_X11)
                    moveCursor(MoveLineStart, e->state() & Qt::ShiftButton);
#else
                    selectAll(true);
#endif
                    break;
                case Qt::Key_B:
                    moveCursor(MoveBackward, e->state() & Qt::ShiftButton);
                    break;
                case Qt::Key_F:
                    moveCursor(MoveForward, e->state() & Qt::ShiftButton);
                    break;
                case Qt::Key_D:
                    if (doc->hasSelection(Q3TextDocument::Standard)) {
                        removeSelectedText();
                        break;
                    }
                    doKeyboardAction(ActionDelete);
                    clearUndoRedoInfo = false;
                    break;
                case Qt::Key_H:
                    if (doc->hasSelection(Q3TextDocument::Standard)) {
                        removeSelectedText();
                        break;
                    }
                    if (!cursor->paragraph()->prev() &&
                         cursor->atParagStart())
                        break;

                    doKeyboardAction(ActionBackspace);
                    clearUndoRedoInfo = false;
                    break;
                case Qt::Key_E:
                    moveCursor(MoveLineEnd, e->state() & Qt::ShiftButton);
                    break;
                case Qt::Key_N:
                    moveCursor(MoveDown, e->state() & Qt::ShiftButton);
                    break;
                case Qt::Key_P:
                    moveCursor(MoveUp, e->state() & Qt::ShiftButton);
                    break;
                case Qt::Key_Z:
                    if(e->state() & Qt::ShiftButton)
                        redo();
                    else
                        undo();
                    break;
                case Qt::Key_Y: