qt_demoe/third/designer/lib/shared/textpropertyeditor.cpp

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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the Qt Designer of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "textpropertyeditor_p.h"
#include "propertylineedit_p.h"
#include "stylesheeteditor_p.h"
#include <QtGui/QLineEdit>
#include <QtGui/QRegExpValidator>
#include <QtGui/QResizeEvent>
#include <QtGui/QCompleter>
#include <QtGui/QAbstractItemView>
#include <QtCore/QRegExp>
#include <QtCore/QUrl>
#include <QtCore/QFile>
#include <QtCore/QDebug>
QT_BEGIN_NAMESPACE
namespace {
const QChar NewLineChar(QLatin1Char('\n'));
const QLatin1String EscapedNewLine("\\n");
// A validator that replaces offending strings
class ReplacementValidator : public QValidator {
public:
ReplacementValidator (QObject * parent,
const QString &offending,
const QString &replacement);
virtual void fixup ( QString & input ) const;
virtual State validate ( QString & input, int &pos) const;
private:
const QString m_offending;
const QString m_replacement;
};
ReplacementValidator::ReplacementValidator (QObject * parent,
const QString &offending,
const QString &replacement) :
QValidator(parent ),
m_offending(offending),
m_replacement(replacement)
{
}
void ReplacementValidator::fixup ( QString & input ) const {
input.replace(m_offending, m_replacement);
}
QValidator::State ReplacementValidator::validate ( QString & input, int &/* pos */) const {
fixup (input);
return Acceptable;
}
// A validator for style sheets. Does newline handling and validates sheets.
class StyleSheetValidator : public ReplacementValidator {
public:
StyleSheetValidator (QObject * parent);
virtual State validate(QString & input, int &pos) const;
};
StyleSheetValidator::StyleSheetValidator (QObject * parent) :
ReplacementValidator(parent, NewLineChar, EscapedNewLine)
{
}
QValidator::State StyleSheetValidator::validate ( QString & input, int &pos) const
{
// base class
const State state = ReplacementValidator:: validate(input, pos);
if (state != Acceptable)
return state;
// now check style sheet, create string with newlines
const QString styleSheet = qdesigner_internal::TextPropertyEditor::editorStringToString(input, qdesigner_internal::ValidationStyleSheet);
const bool valid = qdesigner_internal::StyleSheetEditorDialog::isStyleSheetValid(styleSheet);
return valid ? Acceptable : Intermediate;
}
// A validator for URLs based on QUrl. Enforces complete protocol
// specification with a completer (adds a trailing slash)
class UrlValidator : public QValidator {
public:
UrlValidator(QCompleter *completer, QObject *parent);
virtual State validate(QString &input, int &pos) const;
virtual void fixup(QString &input) const;
private:
QUrl guessUrlFromString(const QString &string) const;
QCompleter *m_completer;
};
UrlValidator::UrlValidator(QCompleter *completer, QObject *parent) :
QValidator(parent),
m_completer(completer)
{
}
QValidator::State UrlValidator::validate(QString &input, int &pos) const
{
Q_UNUSED(pos);
if (input.isEmpty())
return Acceptable;
const QUrl url(input, QUrl::StrictMode);
if (!url.isValid() || url.isEmpty())
return Intermediate;
if (url.scheme().isEmpty())
return Intermediate;
if (url.host().isEmpty() && url.path().isEmpty())
return Intermediate;
return Acceptable;
}
void UrlValidator::fixup(QString &input) const
{
// Don't try to fixup if the user is busy selecting a completion proposal
if (const QAbstractItemView *iv = m_completer->popup()) {
if (iv->isVisible())
return;
}
input = guessUrlFromString(input).toString();
}
QUrl UrlValidator::guessUrlFromString(const QString &string) const
{
const QString urlStr = string.trimmed();
const QRegExp qualifiedUrl(QLatin1String("^[a-zA-Z]+\\:.*"));
// Check if it looks like a qualified URL. Try parsing it and see.
const bool hasSchema = qualifiedUrl.exactMatch(urlStr);
if (hasSchema) {
const QUrl url(urlStr, QUrl::TolerantMode);
if (url.isValid())
return url;
}
// Might be a Qt resource
if (string.startsWith(QLatin1String(":/")))
return QUrl(QLatin1String("qrc") + string);
// Might be a file.
if (QFile::exists(urlStr))
return QUrl::fromLocalFile(urlStr);
// Might be a short url - try to detect the schema.
if (!hasSchema) {
const int dotIndex = urlStr.indexOf(QLatin1Char('.'));
if (dotIndex != -1) {
const QString prefix = urlStr.left(dotIndex).toLower();
QString urlString;
if (prefix == QLatin1String("ftp"))
urlString += prefix;
else
urlString += QLatin1String("http");
urlString += QLatin1String("://");
urlString += urlStr;
const QUrl url(urlString, QUrl::TolerantMode);
if (url.isValid())
return url;
}
}
// Fall back to QUrl's own tolerant parser.
return QUrl(string, QUrl::TolerantMode);
}
}
namespace qdesigner_internal {
// TextPropertyEditor
TextPropertyEditor::TextPropertyEditor(QWidget *parent,
EmbeddingMode embeddingMode,
TextPropertyValidationMode validationMode) :
QWidget(parent),
m_validationMode(ValidationSingleLine),
m_updateMode(UpdateAsYouType),
m_lineEdit(new PropertyLineEdit(this)),
m_textEdited(false)
{
switch (embeddingMode) {
case EmbeddingNone:
break;
case EmbeddingTreeView:
m_lineEdit->setFrame(false);
break;
case EmbeddingInPlace:
m_lineEdit->setFrame(false);
Q_ASSERT(parent);
m_lineEdit->setBackgroundRole(parent->backgroundRole());
break;
}
setFocusProxy(m_lineEdit);
connect(m_lineEdit,SIGNAL(editingFinished()), this, SIGNAL(editingFinished()));
connect(m_lineEdit,SIGNAL(returnPressed()), this, SLOT(slotEditingFinished()));
connect(m_lineEdit,SIGNAL(textChanged(QString)), this, SLOT(slotTextChanged(QString)));
connect(m_lineEdit,SIGNAL(textEdited(QString)), this, SLOT(slotTextEdited()));
setTextPropertyValidationMode(validationMode);
}
void TextPropertyEditor::setTextPropertyValidationMode(TextPropertyValidationMode vm) {
m_validationMode = vm;
m_lineEdit->setWantNewLine(multiLine(m_validationMode));
switch (m_validationMode) {
case ValidationStyleSheet:
m_lineEdit->setValidator(new StyleSheetValidator(m_lineEdit));
m_lineEdit->setCompleter(0);
break;
case ValidationMultiLine:
case ValidationRichText:
// Set a validator that replaces newline characters by literal "\\n".
// While it is not possible to actually type a newline characters,
// it can be pasted into the line edit.
m_lineEdit->setValidator(new ReplacementValidator(m_lineEdit, NewLineChar, EscapedNewLine));
m_lineEdit->setCompleter(0);
break;
case ValidationSingleLine:
// Set a validator that replaces newline characters by a blank.
m_lineEdit->setValidator(new ReplacementValidator(m_lineEdit, NewLineChar, QString(QLatin1Char(' '))));
m_lineEdit->setCompleter(0);
break;
case ValidationObjectName:
setRegExpValidator(QLatin1String("[_a-zA-Z][_a-zA-Z0-9]{,1023}"));
m_lineEdit->setCompleter(0);
break;
case ValidationObjectNameScope:
setRegExpValidator(QLatin1String("[_a-zA-Z:][_a-zA-Z0-9:]{,1023}"));
m_lineEdit->setCompleter(0);
break;
case ValidationURL: {
static QStringList urlCompletions;
if (urlCompletions.empty()) {
urlCompletions.push_back(QLatin1String("about:blank"));
urlCompletions.push_back(QLatin1String("http://"));
urlCompletions.push_back(QLatin1String("http://www."));
urlCompletions.push_back(QLatin1String("http://qt.nokia.com/"));
urlCompletions.push_back(QLatin1String("file://"));
urlCompletions.push_back(QLatin1String("ftp://"));
urlCompletions.push_back(QLatin1String("data:"));
urlCompletions.push_back(QLatin1String("data:text/html,"));
urlCompletions.push_back(QLatin1String("qrc:/"));
}
QCompleter *completer = new QCompleter(urlCompletions, m_lineEdit);
m_lineEdit->setCompleter(completer);
m_lineEdit->setValidator(new UrlValidator(completer, m_lineEdit));
}
break;
}
setFocusProxy(m_lineEdit);
setText(m_cachedText);
markIntermediateState();
}
void TextPropertyEditor::setRegExpValidator(const QString &pattern)
{
const QRegExp regExp(pattern);
Q_ASSERT(regExp.isValid());
m_lineEdit->setValidator(new QRegExpValidator(regExp,m_lineEdit));
}
QString TextPropertyEditor::text() const
{
return m_cachedText;
}
void TextPropertyEditor::markIntermediateState()
{
if (m_lineEdit->hasAcceptableInput()) {
m_lineEdit->setPalette(QPalette());
} else {
QPalette palette = m_lineEdit->palette();
palette.setColor(QPalette::Active, QPalette::Text, Qt::red);
m_lineEdit->setPalette(palette);
}
}
void TextPropertyEditor::setText(const QString &text)
{
m_cachedText = text;
m_lineEdit->setText(stringToEditorString(text, m_validationMode));
markIntermediateState();
m_textEdited = false;
}
void TextPropertyEditor::slotTextEdited()
{
m_textEdited = true;
}
void TextPropertyEditor::slotTextChanged(const QString &text) {
m_cachedText = editorStringToString(text, m_validationMode);
markIntermediateState();
if (m_updateMode == UpdateAsYouType)
emit textChanged(m_cachedText);
}
void TextPropertyEditor::slotEditingFinished()
{
if (m_updateMode == UpdateOnFinished && m_textEdited) {
emit textChanged(m_cachedText);
m_textEdited = false;
}
}
void TextPropertyEditor::selectAll() {
m_lineEdit->selectAll();
}
void TextPropertyEditor::clear() {
m_lineEdit->clear();
}
void TextPropertyEditor::setAlignment(Qt::Alignment alignment) {
m_lineEdit->setAlignment(alignment);
}
void TextPropertyEditor::installEventFilter(QObject *filterObject)
{
if (m_lineEdit)
m_lineEdit->installEventFilter(filterObject);
}
void TextPropertyEditor::resizeEvent ( QResizeEvent * event ) {
m_lineEdit->resize( event->size());
}
QSize TextPropertyEditor::sizeHint () const {
return m_lineEdit->sizeHint ();
}
QSize TextPropertyEditor::minimumSizeHint () const {
return m_lineEdit->minimumSizeHint ();
}
// Returns whether newline characters are valid in validationMode.
bool TextPropertyEditor::multiLine(TextPropertyValidationMode validationMode) {
return validationMode == ValidationMultiLine || validationMode == ValidationStyleSheet || validationMode == ValidationRichText;
}
// Replace newline characters literal "\n" for inline editing in mode ValidationMultiLine
QString TextPropertyEditor::stringToEditorString(const QString &s, TextPropertyValidationMode validationMode) {
if (s.isEmpty() || !multiLine(validationMode))
return s;
QString rc(s);
// protect backslashes
rc.replace(QLatin1Char('\\'), QLatin1String("\\\\"));
// escape newlines
rc.replace(NewLineChar, QString(EscapedNewLine));
return rc;
}
// Replace literal "\n" by actual new lines for inline editing in mode ValidationMultiLine
// Note: As the properties are updated while the user types, it is important
// that trailing slashes ('bla\') are not deleted nor ignored, else this will
// cause jumping of the cursor
QString TextPropertyEditor::editorStringToString(const QString &s, TextPropertyValidationMode validationMode) {
if (s.isEmpty() || !multiLine(validationMode))
return s;
QString rc(s);
for (int pos = 0; (pos = rc.indexOf(QLatin1Char('\\'),pos)) >= 0 ; ) {
// found an escaped character. If not a newline or at end of string, leave as is, else insert '\n'
const int nextpos = pos + 1;
if (nextpos >= rc.length()) // trailing '\\'
break;
// Escaped NewLine
if (rc.at(nextpos) == QChar(QLatin1Char('n')))
rc[nextpos] = NewLineChar;
// Remove escape, go past escaped
rc.remove(pos,1);
pos++;
}
return rc;
}
bool TextPropertyEditor::hasAcceptableInput() const {
return m_lineEdit->hasAcceptableInput();
}
}
QT_END_NAMESPACE