TextEditors: Remove useless duplicated (set)textCodec methods

They are duplicated from TextDocument::(set)codec. The default
implementation of the duplicated methods was just delegating to the text
document. The override of setTextCodec in QmlJsEditor was useless, since
it was only called from EditorConfiguration::configureEditor with the
ITextEditor::TextCodecFromProjectSetting flag anyhow, which made the
overridden method in QmlJsEditor be the same as the fallback.
Aside from that, the duplicated methods wouldn't have belonged to the
*editor* anyhow, but to the document.

Change-Id: Ib43c28210b6bf88726159d751a4905a1d062f80e
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>

src/plugins/projectexplorer/editorconfiguration.cpp

@@ -237,7 +237,7 @@ void EditorConfiguration::configureEditor(ITextEditor *textEditor) const
     if (baseTextEditor)
         baseTextEditor->setCodeStyle(codeStyle(baseTextEditor->languageSettingsId()));
     if (!d->m_useGlobal) {
-        textEditor->setTextCodec(d->m_textCodec, ITextEditor::TextCodecFromProjectSetting);
+        textEditor->textDocument()->setCodec(d->m_textCodec);
         if (baseTextEditor)
             switchSettings(baseTextEditor);
     }

src/plugins/qmljseditor/qmljseditoreditable.cpp

@@ -60,13 +60,6 @@ bool QmlJSEditor::isDesignModePreferred() const
     return false;
 }
 
-void QmlJSEditor::setTextCodec(QTextCodec *codec, TextCodecReason reason)
-{
-    if (reason != TextCodecOtherReason) // qml is defined to be utf8
-        return;
-    editorWidget()->setTextCodec(codec);
-}
-
 const Utils::CommentDefinition *QmlJSEditor::commentDefinition() const
 {
     return &m_commentDefinition;

src/plugins/qmljseditor/qmljseditoreditable.h

@@ -49,7 +49,6 @@ public:
     Core::Id id() const;
     bool open(QString *errorString, const QString &fileName, const QString &realFileName);
     bool isDesignModePreferred() const;
-    void setTextCodec(QTextCodec *codec, TextCodecReason = TextCodecOtherReason);
 
     const Utils::CommentDefinition *commentDefinition() const;
 private:

src/plugins/texteditor/basetexteditor.cpp

@@ -5837,17 +5837,6 @@ void BaseTextEditorWidget::unfoldAll()
     centerCursor();
 }
 
-void BaseTextEditorWidget::setTextCodec(QTextCodec *codec)
-{
-    baseTextDocument()->setCodec(codec);
-}
-
-QTextCodec *BaseTextEditorWidget::textCodec() const
-{
-    // TODO: Fix all QTextCodec usages to be const *.
-    return const_cast<QTextCodec *>(baseTextDocument()->codec());
-}
-
 void BaseTextEditorWidget::setReadOnly(bool b)
 {
     QPlainTextEdit::setReadOnly(b);

src/plugins/texteditor/basetexteditor.h

@@ -211,9 +211,6 @@ public:
     void setActionHack(QObject *hack);
     QObject *actionHack() const;
 
-    void setTextCodec(QTextCodec *codec);
-    QTextCodec *textCodec() const;
-
     void setReadOnly(bool b);
 
     void setTextCursor(const QTextCursor &cursor);
@@ -640,9 +637,6 @@ public:
 
     QString contextHelpId() const; // from IContext
 
-    void setTextCodec(QTextCodec *codec, TextCodecReason = TextCodecOtherReason) { m_editorWidget->setTextCodec(codec); }
-    QTextCodec *textCodec() const { return m_editorWidget->textCodec(); }
-
     // ITextEditor
     void remove(int length);
     void insert(const QString &string);

src/plugins/texteditor/itexteditor.cpp

@@ -59,7 +59,7 @@ QMap<QString, QTextCodec *> TextEditor::ITextEditor::openedTextEditorsEncodings(
         if (!textEditor)
             continue;
         QString fileName = textEditor->document()->filePath();
-        workingCopy[fileName] = textEditor->textCodec();
+        workingCopy[fileName] = const_cast<QTextCodec *>(textEditor->textDocument()->codec());
     }
     return workingCopy;
 }

src/plugins/texteditor/itexteditor.h

@@ -109,15 +109,6 @@ public:
 
     virtual ITextMarkable *markableInterface() = 0;
 
-    enum TextCodecReason {
-        TextCodecOtherReason,
-        TextCodecFromSystemSetting,
-        TextCodecFromProjectSetting
-    };
-
-    virtual void setTextCodec(QTextCodec *, TextCodecReason reason = TextCodecOtherReason) = 0;
-    virtual QTextCodec *textCodec() const = 0;
-
     virtual const Utils::CommentDefinition* commentDefinition() const = 0;
 
     static QMap<QString, QString> openedTextEditorsContents();

src/plugins/vcsbase/vcsbaseeditor.cpp

@@ -1164,7 +1164,7 @@ DiffChunk VcsBaseEditorWidget::diffChunk(QTextCursor cursor) const
             unicode += QLatin1Char('\n');
         }
     }
-    const QTextCodec *cd = textCodec();
+    const QTextCodec *cd = baseTextDocument()->codec();
     rc.chunk = cd ? cd->fromUnicode(unicode) : unicode.toLocal8Bit();
     return rc;
 }
@@ -1232,8 +1232,8 @@ static QTextCodec *findFileCodec(const QString &source)
     if (!editors.empty()) {
         const EditorList::const_iterator ecend =  editors.constEnd();
         for (EditorList::const_iterator it = editors.constBegin(); it != ecend; ++it)
-            if (const TextEditor::BaseTextEditor *be = qobject_cast<const TextEditor::BaseTextEditor *>(*it)) {
-                QTextCodec *codec = be->editorWidget()->textCodec();
+            if (TextEditor::BaseTextEditor *be = qobject_cast<TextEditor::BaseTextEditor *>(*it)) {
+                QTextCodec *codec = const_cast<QTextCodec *>(be->textDocument()->codec());
                 return codec;
             }
     }