Introduced IFile::checkPermission() and use it to reduce the number of calls to isWritable().

Done with: mae

src/plugins/coreplugin/editormanager/editormanager.cpp

@@ -1173,6 +1173,8 @@ bool EditorManager::saveFile(IEditor *editor)
         return false;
 
     IFile *file = editor->file();
+    file->checkPermissions();
+
     const QString &fileName = file->fileName();
     if (!fileName.isEmpty() && file->isReadOnly()) {
         MakeWritableResult answer =
@@ -1242,6 +1244,7 @@ EditorManager::makeEditorWritable(IEditor *editor)
             QMessageBox::warning(m_d->m_core->mainWindow(), tr("Failed!"), tr("Could not open the file for edit with SCC."));
             return Failed;
         }
+        file->checkPermissions();
         return OpenedWithVersionControl;
     case RO_MakeWriteable: {
         const bool permsOk = QFile::setPermissions(fileName, QFile::permissions(fileName) | QFile::WriteUser);
@@ -1250,6 +1253,7 @@ EditorManager::makeEditorWritable(IEditor *editor)
             return Failed;
         }
     }
+        file->checkPermissions();
         return MadeWritable;
     case RO_SaveAs :
         return saveFileAs(editor) ? SavedAs : Failed;

src/plugins/coreplugin/ifile.h

@@ -60,6 +60,8 @@ public:
 
     virtual void modified(ReloadBehavior *behavior) = 0;
 
+    virtual void checkPermissions() {}
+
 signals:
     void changed();
 };

src/plugins/texteditor/basetextdocument.cpp

@@ -70,6 +70,7 @@ BaseTextDocument::BaseTextDocument()
 {
     m_documentMarker = new DocumentMarker(m_document);
     m_lineTerminatorMode = NativeLineTerminator;
+    m_fileIsReadOnly = false;
     m_isBinaryData = false;
     m_codec = QTextCodec::codecForLocale();
     m_hasDecodingError = false;
@@ -149,17 +150,8 @@ bool BaseTextDocument::isReadOnly() const
 
     const QFileInfo fi(m_fileName);
 
-#ifdef Q_OS_WIN
-    // Check for permissions on NTFS file systems
-    qt_ntfs_permission_lookup++;
-#endif
+    return m_fileIsReadOnly;
 
-    const bool ro = !fi.isWritable();
-
-#ifdef Q_OS_WIN
-    qt_ntfs_permission_lookup--;
-#endif
-    return ro;
 }
 
 bool BaseTextDocument::isModified() const
@@ -167,11 +159,33 @@ bool BaseTextDocument::isModified() const
     return m_document->isModified();
 }
 
+void BaseTextDocument::checkPermissions()
+{
+    if (!m_fileName.isEmpty()) {
+        const QFileInfo fi(m_fileName);
+
+#ifdef Q_OS_WIN
+        // Check for permissions on NTFS file systems
+        qt_ntfs_permission_lookup++;
+#endif
+
+        m_fileIsReadOnly = !fi.isWritable();
+
+#ifdef Q_OS_WIN
+        qt_ntfs_permission_lookup--;
+#endif
+
+    } else {
+        m_fileIsReadOnly = false;
+    }
+}
+
 bool BaseTextDocument::open(const QString &fileName)
 {
     QString title = tr("untitled");
     if (!fileName.isEmpty()) {
         const QFileInfo fi(fileName);
+        m_fileIsReadOnly = !fi.isWritable();
         m_fileName = fi.absoluteFilePath();
 
         QFile file(fileName);

src/plugins/texteditor/basetextdocument.h

@@ -83,6 +83,7 @@ public:
     virtual bool isReadOnly() const;
     virtual bool isModified() const;
     virtual bool isSaveAsAllowed() const { return true; }
+    virtual void checkPermissions();
     virtual void modified(Core::IFile::ReloadBehavior *behavior);
     virtual QString mimeType() const;
     void setMimeType(const QString &mt);
@@ -141,6 +142,7 @@ private:
     LineTerminatorMode m_lineTerminatorMode;
     QTextCodec *m_codec;
 
+    bool m_fileIsReadOnly;
     bool m_isBinaryData;
     bool m_hasDecodingError;
     QByteArray m_decodingErrorSample;

src/plugins/texteditor/basetexteditor.cpp

@@ -1312,15 +1312,6 @@ void BaseTextEditorPrivate::setupDocumentSignals(BaseTextDocument *document)
     q->slotUpdateExtraAreaWidth();
 }
 
-#ifndef TEXTEDITOR_STANDALONE
-bool BaseTextEditorPrivate::needMakeWritableCheck() const
-{
-    return !m_document->isModified()
-            && !m_document->fileName().isEmpty()
-            && m_document->isReadOnly();
-}
-#endif
-
 bool Parenthesis::hasClosingCollapse(const Parentheses &parentheses)
 {
     return closeCollapseAtPos(parentheses) >= 0;

src/plugins/texteditor/basetexteditor_p.h

@@ -128,9 +128,6 @@ public:
 #endif
     void setupDocumentSignals(BaseTextDocument *document);
     void updateLineSelectionColor();
-#ifndef TEXTEDITOR_STANDALONE
-    bool needMakeWritableCheck() const;
-#endif
 
     void print(QPrinter *printer);