TextEditor: Factor out codec chooser

Change-Id: I664f7ba484f379b8d2b8254d4f880c0d37d70ff8 Reviewed-by: hjk <hjk@qt.io> Reviewed-by: David Schulz <david.schulz@qt.io>
2022-07-26 23:38:00 +03:00
parent 4edb238073
commit eb33d26090
6 changed files with 166 additions and 61 deletions
--- a/src/plugins/texteditor/codecchooser.cpp
+++ b/src/plugins/texteditor/codecchooser.cpp
@@ -0,0 +1,95 @@
+/****************************************************************************
+**
+** Copyright (C) 2022 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 "codecchooser.h"
+
+#include <utils/algorithm.h>
+
+#include <QTextCodec>
+
+namespace TextEditor {
+
+CodecChooser::CodecChooser()
+{
+    QList<int> mibs = QTextCodec::availableMibs();
+    Utils::sort(mibs);
+    QList<int>::iterator firstNonNegative =
+        std::find_if(mibs.begin(), mibs.end(), [](int n) { return n >=0; });
+    if (firstNonNegative != mibs.end())
+        std::rotate(mibs.begin(), firstNonNegative, mibs.end());
+    for (int mib : qAsConst(mibs)) {
+        if (QTextCodec *codec = QTextCodec::codecForMib(mib)) {
+            QString compoundName = QLatin1String(codec->name());
+            const QList<QByteArray> aliases = codec->aliases();
+            for (const QByteArray &alias : aliases) {
+                compoundName += QLatin1String(" / ");
+                compoundName += QString::fromLatin1(alias);
+            }
+            addItem(compoundName);
+            m_codecs.append(codec);
+        }
+    }
+    connect(this, &QComboBox::currentIndexChanged,
+            this, [this](int index) { emit codecChanged(m_codecs.at(index)); });
+}
+
+QTextCodec *CodecChooser::currentCodec() const
+{
+    return codecAt(currentIndex());
+}
+
+QTextCodec *CodecChooser::codecAt(int index) const
+{
+    if (index < 0)
+        index = 0;
+    return m_codecs[index];
+}
+
+void CodecChooser::setAssignedCodec(QTextCodec *codec, const QString &name)
+{
+    int rememberedSystemPosition = -1;
+    for (int i = 0, total = m_codecs.size(); i < total; ++i) {
+        if (codec != m_codecs.at(i))
+            continue;
+        if (itemText(i) == name) {
+            setCurrentIndex(i);
+            return;
+        }
+        // we've got System matching encoding - but have explicitly set the codec
+        rememberedSystemPosition = i;
+    }
+    if (rememberedSystemPosition != -1)
+        setCurrentIndex(rememberedSystemPosition);
+}
+
+QByteArray CodecChooser::assignedCodecName() const
+{
+    const int index = currentIndex();
+    return index == 0
+            ? QByteArray("System")   // we prepend System to the available codecs
+            : m_codecs.at(index)->name();
+}
+
+} // TextEditor