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Diffstat (limited to 'src/plugins/coreplugin/dialogs/codecselector.cpp')
| -rw-r--r-- | src/plugins/coreplugin/dialogs/codecselector.cpp | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/src/plugins/coreplugin/dialogs/codecselector.cpp b/src/plugins/coreplugin/dialogs/codecselector.cpp new file mode 100644 index 0000000000..a84b0fa112 --- /dev/null +++ b/src/plugins/coreplugin/dialogs/codecselector.cpp @@ -0,0 +1,161 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of Qt Creator. +** +** 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 The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3 as published by the Free Software +** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-3.0.html. +** +****************************************************************************/ + +#include "codecselector.h" +#include <coreplugin/textdocument.h> + +#include <utils/algorithm.h> +#include <utils/fileutils.h> +#include <utils/itemviews.h> + +#include <QDebug> +#include <QTextCodec> +#include <QPushButton> +#include <QScrollBar> +#include <QVBoxLayout> + +namespace Core { + +/* custom class to make sure the width is wide enough for the + * contents. Should be easier with Qt. */ +class CodecListWidget : public Utils::ListWidget +{ +public: + CodecListWidget(QWidget *parent) : Utils::ListWidget(parent){} + QSize sizeHint() const override { + return QListWidget::sizeHint().expandedTo( + QSize(sizeHintForColumn(0) + verticalScrollBar()->sizeHint().width() + 4, 0)); + } +}; + +CodecSelector::CodecSelector(QWidget *parent, Core::BaseTextDocument *doc) + : QDialog(parent) +{ + m_hasDecodingError = doc->hasDecodingError(); + m_isModified = doc->isModified(); + + QByteArray buf; + if (m_hasDecodingError) + buf = doc->decodingErrorSample(); + + setWindowTitle(tr("Text Encoding")); + m_label = new QLabel(this); + QString decodingErrorHint; + if (m_hasDecodingError) + decodingErrorHint = QLatin1Char('\n') + tr("The following encodings are likely to fit:"); + m_label->setText(tr("Select encoding for \"%1\".%2") + .arg(doc->filePath().fileName()) + .arg(decodingErrorHint)); + + m_listWidget = new CodecListWidget(this); + m_listWidget->setActivationMode(Utils::DoubleClickActivation); + + QStringList encodings; + + QList<int> mibs = QTextCodec::availableMibs(); + Utils::sort(mibs); + QList<int> sortedMibs; + foreach (int mib, mibs) + if (mib >= 0) + sortedMibs += mib; + foreach (int mib, mibs) + if (mib < 0) + sortedMibs += mib; + + int currentIndex = -1; + foreach (int mib, sortedMibs) { + QTextCodec *c = QTextCodec::codecForMib(mib); + if (!buf.isEmpty()) { + + // slow, should use a feature from QTextCodec or QTextDecoder (but those are broken currently) + QByteArray verifyBuf = c->fromUnicode(c->toUnicode(buf)); + // the minSize trick lets us ignore unicode headers + int minSize = qMin(verifyBuf.size(), buf.size()); + if (minSize < buf.size() - 4 + || memcmp(verifyBuf.constData() + verifyBuf.size() - minSize, + buf.constData() + buf.size() - minSize, minSize)) + continue; + } + QString names = QString::fromLatin1(c->name()); + foreach (const QByteArray &alias, c->aliases()) + names += QLatin1String(" / ") + QString::fromLatin1(alias); + if (doc->codec() == c) + currentIndex = encodings.count(); + encodings << names; + } + m_listWidget->addItems(encodings); + if (currentIndex >= 0) + m_listWidget->setCurrentRow(currentIndex); + + connect(m_listWidget, &QListWidget::itemSelectionChanged, this, &CodecSelector::updateButtons); + + m_dialogButtonBox = new QDialogButtonBox(this); + m_reloadButton = m_dialogButtonBox->addButton(tr("Reload with Encoding"), QDialogButtonBox::DestructiveRole); + m_saveButton = m_dialogButtonBox->addButton(tr("Save with Encoding"), QDialogButtonBox::DestructiveRole); + m_dialogButtonBox->addButton(QDialogButtonBox::Cancel); + connect(m_dialogButtonBox, &QDialogButtonBox::clicked, this, &CodecSelector::buttonClicked); + connect(m_listWidget, &QAbstractItemView::activated, m_reloadButton, &QAbstractButton::click); + + auto vbox = new QVBoxLayout(this); + vbox->addWidget(m_label); + vbox->addWidget(m_listWidget); + vbox->addWidget(m_dialogButtonBox); + + updateButtons(); +} + +CodecSelector::~CodecSelector() = default; + +void CodecSelector::updateButtons() +{ + bool hasCodec = (selectedCodec() != nullptr); + m_reloadButton->setEnabled(!m_isModified && hasCodec); + m_saveButton->setEnabled(!m_hasDecodingError && hasCodec); +} + +QTextCodec *CodecSelector::selectedCodec() const +{ + if (QListWidgetItem *item = m_listWidget->currentItem()) { + if (!item->isSelected()) + return nullptr; + QString codecName = item->text(); + if (codecName.contains(QLatin1String(" / "))) + codecName = codecName.left(codecName.indexOf(QLatin1String(" / "))); + return QTextCodec::codecForName(codecName.toLatin1()); + } + return nullptr; +} + +void CodecSelector::buttonClicked(QAbstractButton *button) +{ + Result result = Cancel; + if (button == m_reloadButton) + result = Reload; + if (button == m_saveButton) + result = Save; + done(result); +} + +} // namespace Core |