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479 lines
16 KiB
C++
479 lines
16 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3.0 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU General Public License version 3.0 requirements will be
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** met: http://www.gnu.org/copyleft/gpl.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef QLINECONTROL_P_H
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#define QLINECONTROL_P_H
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//
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// W A R N I N G
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// -------------
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//
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// This file is not part of the Qt API. It exists purely as an
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// implementation detail. This header file may change from version to
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// version without notice, or even be removed.
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//
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// We mean it.
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//
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#include "QtCore/qglobal.h"
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#ifndef QT_NO_LINEEDIT
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#include "qwidget_p.h"
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#include "QtGui/qlineedit.h"
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#include "QtGui/qtextlayout.h"
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#include "QtGui/qstyleoption.h"
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#include "QtCore/qpointer.h"
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#include "QtGui/qclipboard.h"
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#include "QtCore/qpoint.h"
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#include "QtGui/qcompleter.h"
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#include "qaccessible.h"
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#include "qplatformdefs.h"
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QT_BEGIN_HEADER
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QT_BEGIN_NAMESPACE
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class Q_GUI_EXPORT QLineControl : public QObject
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{
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Q_OBJECT
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public:
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QLineControl(const QString &txt = QString())
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: m_cursor(0), m_preeditCursor(0), m_cursorWidth(0), m_layoutDirection(Qt::LayoutDirectionAuto),
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m_hideCursor(false), m_separator(0), m_readOnly(0),
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m_dragEnabled(0), m_echoMode(0), m_textDirty(0), m_selDirty(0),
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m_validInput(1), m_blinkStatus(0), m_blinkPeriod(0), m_blinkTimer(0), m_deleteAllTimer(0),
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m_ascent(0), m_maxLength(32767), m_lastCursorPos(-1),
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m_tripleClickTimer(0), m_maskData(0), m_modifiedState(0), m_undoState(0),
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m_selstart(0), m_selend(0), m_passwordEchoEditing(false)
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#ifdef QT_GUI_PASSWORD_ECHO_DELAY
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, m_passwordEchoTimer(0)
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#endif
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{
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init(txt);
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}
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~QLineControl()
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{
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delete [] m_maskData;
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}
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int nextMaskBlank(int pos)
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{
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int c = findInMask(pos, true, false);
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m_separator |= (c != pos);
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return (c != -1 ? c : m_maxLength);
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}
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int prevMaskBlank(int pos)
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{
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int c = findInMask(pos, false, false);
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m_separator |= (c != pos);
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return (c != -1 ? c : 0);
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}
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bool isUndoAvailable() const;
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bool isRedoAvailable() const;
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void clearUndo() { m_history.clear(); m_modifiedState = m_undoState = 0; }
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bool isModified() const { return m_modifiedState != m_undoState; }
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void setModified(bool modified) { m_modifiedState = modified ? -1 : m_undoState; }
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bool allSelected() const { return !m_text.isEmpty() && m_selstart == 0 && m_selend == (int)m_text.length(); }
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bool hasSelectedText() const { return !m_text.isEmpty() && m_selend > m_selstart; }
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int width() const { return qRound(m_textLayout.lineAt(0).width()) + 1; }
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int height() const { return qRound(m_textLayout.lineAt(0).height()) + 1; }
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int ascent() const { return m_ascent; }
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qreal naturalTextWidth() const { return m_textLayout.lineAt(0).naturalTextWidth(); }
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void setSelection(int start, int length);
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inline QString selectedText() const { return hasSelectedText() ? m_text.mid(m_selstart, m_selend - m_selstart) : QString(); }
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QString textBeforeSelection() const { return hasSelectedText() ? m_text.left(m_selstart) : QString(); }
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QString textAfterSelection() const { return hasSelectedText() ? m_text.mid(m_selend) : QString(); }
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int selectionStart() const { return hasSelectedText() ? m_selstart : -1; }
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int selectionEnd() const { return hasSelectedText() ? m_selend : -1; }
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bool inSelection(int x) const
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{
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if (m_selstart >= m_selend)
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return false;
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int pos = xToPos(x, QTextLine::CursorOnCharacter);
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return pos >= m_selstart && pos < m_selend;
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}
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void removeSelection()
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{
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int priorState = m_undoState;
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removeSelectedText();
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finishChange(priorState);
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}
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int start() const { return 0; }
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int end() const { return m_text.length(); }
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#ifndef QT_NO_CLIPBOARD
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void copy(QClipboard::Mode mode = QClipboard::Clipboard) const;
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void paste(QClipboard::Mode mode = QClipboard::Clipboard);
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#endif
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int cursor() const{ return m_cursor; }
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int preeditCursor() const { return m_preeditCursor; }
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int cursorWidth() const { return m_cursorWidth; }
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void setCursorWidth(int value) { m_cursorWidth = value; }
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Qt::CursorMoveStyle cursorMoveStyle() const { return m_textLayout.cursorMoveStyle(); }
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void setCursorMoveStyle(Qt::CursorMoveStyle style) { m_textLayout.setCursorMoveStyle(style); }
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void moveCursor(int pos, bool mark = false);
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void cursorForward(bool mark, int steps)
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{
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int c = m_cursor;
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if (steps > 0) {
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while (steps--)
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c = cursorMoveStyle() == Qt::VisualMoveStyle ? m_textLayout.rightCursorPosition(c)
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: m_textLayout.nextCursorPosition(c);
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} else if (steps < 0) {
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while (steps++)
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c = cursorMoveStyle() == Qt::VisualMoveStyle ? m_textLayout.leftCursorPosition(c)
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: m_textLayout.previousCursorPosition(c);
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}
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moveCursor(c, mark);
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}
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void cursorWordForward(bool mark) { moveCursor(m_textLayout.nextCursorPosition(m_cursor, QTextLayout::SkipWords), mark); }
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void cursorWordBackward(bool mark) { moveCursor(m_textLayout.previousCursorPosition(m_cursor, QTextLayout::SkipWords), mark); }
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void home(bool mark) { moveCursor(0, mark); }
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void end(bool mark) { moveCursor(text().length(), mark); }
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int xToPos(int x, QTextLine::CursorPosition = QTextLine::CursorBetweenCharacters) const;
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QRect cursorRect() const;
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qreal cursorToX(int cursor) const { return m_textLayout.lineAt(0).cursorToX(cursor); }
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qreal cursorToX() const
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{
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int cursor = m_cursor;
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if (m_preeditCursor != -1)
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cursor += m_preeditCursor;
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return cursorToX(cursor);
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}
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bool isReadOnly() const { return m_readOnly; }
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void setReadOnly(bool enable) { m_readOnly = enable; }
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QString text() const
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{
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QString res = m_maskData ? stripString(m_text) : m_text;
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return (res.isNull() ? QString::fromLatin1("") : res);
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}
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void setText(const QString &txt) { internalSetText(txt, -1, false); }
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QString displayText() const { return m_textLayout.text(); }
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void backspace();
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void del();
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void deselect() { internalDeselect(); finishChange(); }
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void selectAll() { m_selstart = m_selend = m_cursor = 0; moveCursor(m_text.length(), true); }
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void insert(const QString &);
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void clear();
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void undo() { internalUndo(); finishChange(-1, true); }
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void redo() { internalRedo(); finishChange(); }
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void selectWordAtPos(int);
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uint echoMode() const { return m_echoMode; }
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void setEchoMode(uint mode)
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{
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cancelPasswordEchoTimer();
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m_echoMode = mode;
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m_passwordEchoEditing = false;
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updateDisplayText();
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}
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int maxLength() const { return m_maxLength; }
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void setMaxLength(int maxLength)
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{
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if (m_maskData)
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return;
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m_maxLength = maxLength;
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setText(m_text);
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}
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#ifndef QT_NO_VALIDATOR
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const QValidator *validator() const { return m_validator; }
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void setValidator(const QValidator *v) { m_validator = const_cast<QValidator*>(v); }
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#endif
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#ifndef QT_NO_COMPLETER
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QCompleter *completer() const { return m_completer; }
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/* Note that you must set the widget for the completer separately */
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void setCompleter(const QCompleter *c) { m_completer = const_cast<QCompleter*>(c); }
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void complete(int key);
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#endif
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int cursorPosition() const { return m_cursor; }
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void setCursorPosition(int pos) { if (pos <= m_text.length()) moveCursor(qMax(0, pos)); }
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bool hasAcceptableInput() const { return hasAcceptableInput(m_text); }
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bool fixup();
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QString inputMask() const { return m_maskData ? m_inputMask + QLatin1Char(';') + m_blank : QString(); }
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void setInputMask(const QString &mask)
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{
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parseInputMask(mask);
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if (m_maskData)
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moveCursor(nextMaskBlank(0));
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}
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// input methods
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#ifndef QT_NO_IM
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bool composeMode() const { return !m_textLayout.preeditAreaText().isEmpty(); }
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void setPreeditArea(int cursor, const QString &text) { m_textLayout.setPreeditArea(cursor, text); }
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#endif
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QString preeditAreaText() const { return m_textLayout.preeditAreaText(); }
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void updatePasswordEchoEditing(bool editing);
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bool passwordEchoEditing() const {
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#ifdef QT_GUI_PASSWORD_ECHO_DELAY
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if (m_passwordEchoTimer != 0)
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return true;
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#endif
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return m_passwordEchoEditing ;
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}
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QChar passwordCharacter() const { return m_passwordCharacter; }
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void setPasswordCharacter(const QChar &character) { m_passwordCharacter = character; updateDisplayText(); }
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Qt::LayoutDirection layoutDirection() const {
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if (m_layoutDirection == Qt::LayoutDirectionAuto) {
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if (m_text.isEmpty())
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return QApplication::keyboardInputDirection();
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return m_text.isRightToLeft() ? Qt::RightToLeft : Qt::LeftToRight;
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}
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return m_layoutDirection;
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}
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void setLayoutDirection(Qt::LayoutDirection direction)
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{
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if (direction != m_layoutDirection) {
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m_layoutDirection = direction;
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updateDisplayText();
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}
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}
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void setFont(const QFont &font) { m_textLayout.setFont(font); updateDisplayText(); }
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void processInputMethodEvent(QInputMethodEvent *event);
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void processMouseEvent(QMouseEvent* ev);
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void processKeyEvent(QKeyEvent* ev);
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int cursorBlinkPeriod() const { return m_blinkPeriod; }
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void setCursorBlinkPeriod(int msec);
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void resetCursorBlinkTimer();
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QString cancelText() const { return m_cancelText; }
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void setCancelText(const QString &text) { m_cancelText = text; }
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const QPalette &palette() const { return m_palette; }
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void setPalette(const QPalette &p) { m_palette = p; }
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enum DrawFlags {
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DrawText = 0x01,
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DrawSelections = 0x02,
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DrawCursor = 0x04,
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DrawAll = DrawText | DrawSelections | DrawCursor
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};
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void draw(QPainter *, const QPoint &, const QRect &, int flags = DrawAll);
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bool processEvent(QEvent *ev);
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private:
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void init(const QString &txt);
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void removeSelectedText();
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void internalSetText(const QString &txt, int pos = -1, bool edited = true);
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void updateDisplayText(bool forceUpdate = false);
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void internalInsert(const QString &s);
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void internalDelete(bool wasBackspace = false);
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void internalRemove(int pos);
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inline void internalDeselect()
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{
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m_selDirty |= (m_selend > m_selstart);
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m_selstart = m_selend = 0;
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}
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void internalUndo(int until = -1);
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void internalRedo();
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QString m_text;
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QPalette m_palette;
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int m_cursor;
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int m_preeditCursor;
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int m_cursorWidth;
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Qt::LayoutDirection m_layoutDirection;
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uint m_hideCursor : 1; // used to hide the m_cursor inside preedit areas
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uint m_separator : 1;
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uint m_readOnly : 1;
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uint m_dragEnabled : 1;
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uint m_echoMode : 2;
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uint m_textDirty : 1;
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uint m_selDirty : 1;
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uint m_validInput : 1;
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uint m_blinkStatus : 1;
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int m_blinkPeriod; // 0 for non-blinking cursor
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int m_blinkTimer;
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int m_deleteAllTimer;
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int m_ascent;
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int m_maxLength;
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int m_lastCursorPos;
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QList<int> m_transactions;
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QPoint m_tripleClick;
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int m_tripleClickTimer;
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QString m_cancelText;
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void emitCursorPositionChanged();
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bool finishChange(int validateFromState = -1, bool update = false, bool edited = true);
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#ifndef QT_NO_VALIDATOR
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QPointer<QValidator> m_validator;
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#endif
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QPointer<QCompleter> m_completer;
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#ifndef QT_NO_COMPLETER
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bool advanceToEnabledItem(int dir);
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#endif
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struct MaskInputData {
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enum Casemode { NoCaseMode, Upper, Lower };
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QChar maskChar; // either the separator char or the inputmask
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bool separator;
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Casemode caseMode;
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};
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QString m_inputMask;
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QChar m_blank;
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MaskInputData *m_maskData;
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// undo/redo handling
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enum CommandType { Separator, Insert, Remove, Delete, RemoveSelection, DeleteSelection, SetSelection };
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struct Command {
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inline Command() {}
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inline Command(CommandType t, int p, QChar c, int ss, int se) : type(t),uc(c),pos(p),selStart(ss),selEnd(se) {}
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uint type : 4;
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QChar uc;
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int pos, selStart, selEnd;
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};
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int m_modifiedState;
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int m_undoState;
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QVector<Command> m_history;
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void addCommand(const Command& cmd);
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inline void separate() { m_separator = true; }
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// selection
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int m_selstart;
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int m_selend;
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// masking
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void parseInputMask(const QString &maskFields);
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bool isValidInput(QChar key, QChar mask) const;
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bool hasAcceptableInput(const QString &text) const;
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QString maskString(uint pos, const QString &str, bool clear = false) const;
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QString clearString(uint pos, uint len) const;
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QString stripString(const QString &str) const;
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int findInMask(int pos, bool forward, bool findSeparator, QChar searchChar = QChar()) const;
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// complex text layout
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QTextLayout m_textLayout;
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bool m_passwordEchoEditing;
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QChar m_passwordCharacter;
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#ifdef QT_GUI_PASSWORD_ECHO_DELAY
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int m_passwordEchoTimer;
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#endif
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void cancelPasswordEchoTimer()
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{
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#ifdef QT_GUI_PASSWORD_ECHO_DELAY
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if (m_passwordEchoTimer != 0) {
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killTimer(m_passwordEchoTimer);
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m_passwordEchoTimer = 0;
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}
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#endif
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}
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Q_SIGNALS:
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void cursorPositionChanged(int, int);
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void selectionChanged();
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void displayTextChanged(const QString &);
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void textChanged(const QString &);
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void textEdited(const QString &);
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void resetInputContext();
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void updateMicroFocus();
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void accepted();
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void editingFinished();
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void updateNeeded(const QRect &);
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#ifdef QT_KEYPAD_NAVIGATION
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void editFocusChange(bool);
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#endif
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protected:
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virtual void timerEvent(QTimerEvent *event);
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private Q_SLOTS:
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void _q_clipboardChanged();
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void _q_deleteSelected();
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};
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QT_END_NAMESPACE
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QT_END_HEADER
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#endif // QT_NO_LINEEDIT
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#endif // QLINECONTROL_P_H
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