Git: Support encoding convert of commit messages

We need read i18n.commitEncoding value, to write correct encoding of the commit file.
In Windows OS, the default encoding is GBK, So we need convert to correct encoding of the commit messages.

Change-Id: Id5f35745dba15da2c9ceb1266e0ea537cba7da73
Merge-request: 382
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/git/gitsubmiteditor.cpp

@@ -39,6 +39,7 @@
 
 #include <QtCore/QDebug>
 #include <QtCore/QStringList>
+#include <QtCore/QTextCodec>
 
 namespace Git {
 namespace Internal {
@@ -83,6 +84,8 @@ void GitSubmitEditor::setCommitData(const CommitData &d)
     submitEditorWidget()->setPanelData(d.panelData);
     submitEditorWidget()->setPanelInfo(d.panelInfo);
 
+    m_commitEncoding = d.commitEncoding;
+
     m_model = new VCSBase::SubmitFileModel(this);
     addStateFileListToModel(d.stagedFiles,   true,  StagedFile,   m_model);
     addStateFileListToModel(d.unstagedFiles, false, UnstagedFile, m_model);
@@ -128,5 +131,21 @@ GitSubmitEditorPanelData GitSubmitEditor::panelData() const
     return const_cast<GitSubmitEditor*>(this)->submitEditorWidget()->panelData();
 }
 
+QByteArray GitSubmitEditor::fileContents() const
+{
+    const QString& text = const_cast<GitSubmitEditor*>(this)->submitEditorWidget()->descriptionText();
+
+    if (!m_commitEncoding.isEmpty()) {
+        // Do the encoding convert, When use user-defined encoding
+        // e.g. git config --global i18n.commitencoding utf-8
+        QTextCodec *codec = QTextCodec::codecForName(m_commitEncoding.toLocal8Bit());
+        if (codec)
+            return codec->fromUnicode(text);
+    }
+
+    // Using utf-8 as the default encoding
+    return text.toUtf8();
+}
+
 } // namespace Internal
 } // namespace Git