TextEditor: Make completion assist provider a data member

In case of the CppEditor a direct member is not possible due
to setup restrictions inside the CppEditor machinery. I'd expect
that to be fixable when the editor base system is in good shape.

Change-Id: I184e219ca2dff6f67c9b58c182212eb12972cc84
Reviewed-by: Christian Stenger <christian.stenger@digia.com>

src/plugins/android/javaeditor.cpp

@@ -56,6 +56,7 @@ JavaEditor::JavaEditor(JavaEditorWidget *editor)
               TextEditor::Constants::C_TEXTEDITOR));
     setDuplicateSupported(true);
     setCommentStyle(Utils::CommentDefinition::CppStyle);
+    setCompletionAssistProvider(ExtensionSystem::PluginManager::getObject<JavaCompletionAssistProvider>());
 }
 
 Core::IEditor *JavaEditor::duplicate()
@@ -66,11 +67,6 @@ Core::IEditor *JavaEditor::duplicate()
     return ret->editor();
 }
 
-TextEditor::CompletionAssistProvider *JavaEditor::completionAssistProvider()
-{
-    return ExtensionSystem::PluginManager::getObject<JavaCompletionAssistProvider>();
-}
-
 //
 // JavaEditorWidget
 //

src/plugins/cmakeprojectmanager/cmakeeditor.cpp

@@ -63,6 +63,7 @@ CMakeEditor::CMakeEditor(CMakeEditorWidget *editor)
               TextEditor::Constants::C_TEXTEDITOR));
     setDuplicateSupported(true);
     setCommentStyle(Utils::CommentDefinition::HashStyle);
+    setCompletionAssistProvider(ExtensionSystem::PluginManager::getObject<CMakeFileCompletionAssistProvider>());
     connect(document(), SIGNAL(changed()), this, SLOT(markAsChanged()));
 }
 
@@ -74,11 +75,6 @@ Core::IEditor *CMakeEditor::duplicate()
     return ret->editor();
 }
 
-TextEditor::CompletionAssistProvider *CMakeEditor::completionAssistProvider()
-{
-    return ExtensionSystem::PluginManager::getObject<CMakeFileCompletionAssistProvider>();
-}
-
 void CMakeEditor::markAsChanged()
 {
     if (!document()->isModified())

src/plugins/cmakeprojectmanager/cmakeeditor.h

@@ -53,7 +53,6 @@ public:
     CMakeEditor(CMakeEditorWidget *);
 
     Core::IEditor *duplicate();
-    TextEditor::CompletionAssistProvider *completionAssistProvider();
 
     QString contextHelpId() const;
 

src/plugins/cppeditor/cppeditor.cpp

@@ -114,6 +114,9 @@ CPPEditor::CPPEditor(CppEditorWidget *editor)
     m_context.add(TextEditor::Constants::C_TEXTEDITOR);
     setDuplicateSupported(true);
     setCommentStyle(Utils::CommentDefinition::CppStyle);
+    setCompletionAssistProvider([this] () -> TextEditor::CompletionAssistProvider * {
+        return CppModelManagerInterface::instance()->cppEditorSupport(this)->completionAssistProvider();
+    });
 }
 
 Q_GLOBAL_STATIC(CppTools::SymbolFinder, symbolFinder)
@@ -797,11 +800,6 @@ bool CPPEditor::open(QString *errorString, const QString &fileName, const QStrin
     return true;
 }
 
-TextEditor::CompletionAssistProvider *CPPEditor::completionAssistProvider()
-{
-    return CppModelManagerInterface::instance()->cppEditorSupport(this)->completionAssistProvider();
-}
-
 void CppEditorWidget::applyFontSettings()
 {
     const TextEditor::FontSettings &fs = baseTextDocument()->fontSettings();

src/plugins/cppeditor/cppeditor.h

@@ -66,8 +66,6 @@ public:
     bool open(QString *errorString,
               const QString &fileName,
               const QString &realFileName) QTC_OVERRIDE;
-
-    TextEditor::CompletionAssistProvider *completionAssistProvider() QTC_OVERRIDE;
 };
 
 class CppEditorWidget : public TextEditor::BaseTextEditorWidget

src/plugins/glsleditor/glsleditor.cpp

@@ -214,11 +214,6 @@ bool GlslEditor::open(QString *errorString, const QString &fileName, const QStri
     return b;
 }
 
-TextEditor::CompletionAssistProvider *GlslEditor::completionAssistProvider()
-{
-    return ExtensionSystem::PluginManager::getObject<GLSLCompletionAssistProvider>();
-}
-
 QString GlslEditorWidget::wordUnderCursor() const
 {
     QTextCursor tc = textCursor();

src/plugins/glsleditor/glsleditoreditable.cpp

@@ -28,17 +28,14 @@
 ****************************************************************************/
 
 #include "glsleditoreditable.h"
-#include "glsleditor.h"
 #include "glsleditorconstants.h"
+#include "glslcompletionassist.h"
 
 #include <texteditor/texteditorconstants.h>
-#include <qmldesigner/qmldesignerconstants.h>
 
-#include <coreplugin/mimedatabase.h>
 #include <coreplugin/icore.h>
-#include <coreplugin/designmode.h>
-#include <coreplugin/modemanager.h>
-#include <coreplugin/coreconstants.h>
+
+#include <extensionsystem/pluginmanager.h>
 
 namespace GLSLEditor {
 namespace Internal {
@@ -50,6 +47,7 @@ GlslEditor::GlslEditor(GlslEditorWidget *editor)
                              TextEditor::Constants::C_TEXTEDITOR));
     setDuplicateSupported(true);
     setCommentStyle(Utils::CommentDefinition::CppStyle);
+    setCompletionAssistProvider(ExtensionSystem::PluginManager::getObject<GLSLCompletionAssistProvider>());
 }
 
 } // namespace Internal

src/plugins/glsleditor/glsleditoreditable.h

@@ -46,7 +46,6 @@ public:
 
     Core::IEditor *duplicate();
     bool open(QString *errorString, const QString &fileName, const QString &realFileName);
-    TextEditor::CompletionAssistProvider *completionAssistProvider();
 };
 
 } // namespace Internal

src/plugins/qmakeprojectmanager/profileeditor.cpp

@@ -59,6 +59,7 @@ ProFileEditor::ProFileEditor(ProFileEditorWidget *editor)
               TextEditor::Constants::C_TEXTEDITOR));
     setDuplicateSupported(true);
     setCommentStyle(Utils::CommentDefinition::HashStyle);
+    setCompletionAssistProvider(ExtensionSystem::PluginManager::getObject<ProFileCompletionAssistProvider>());
 }
 
 Core::IEditor *ProFileEditor::duplicate()
@@ -69,11 +70,6 @@ Core::IEditor *ProFileEditor::duplicate()
     return ret->editor();
 }
 
-TextEditor::CompletionAssistProvider *ProFileEditor::completionAssistProvider()
-{
-    return ExtensionSystem::PluginManager::getObject<ProFileCompletionAssistProvider>();
-}
-
 //
 // ProFileEditorWidget
 //

src/plugins/qmakeprojectmanager/profileeditor.h

@@ -48,7 +48,6 @@ public:
     ProFileEditor(ProFileEditorWidget *);
 
     Core::IEditor *duplicate();
-    TextEditor::CompletionAssistProvider *completionAssistProvider();
 };
 
 class ProFileEditorWidget : public TextEditor::BaseTextEditorWidget

src/plugins/qmljseditor/qmljseditoreditable.cpp

@@ -55,6 +55,7 @@ QmlJSEditor::QmlJSEditor(QmlJSTextEditorWidget *editor)
     m_context.add(ProjectExplorer::Constants::LANG_QMLJS);
     setDuplicateSupported(true);
     setCommentStyle(Utils::CommentDefinition::CppStyle);
+    setCompletionAssistProvider(ExtensionSystem::PluginManager::getObject<Internal::QmlJSCompletionAssistProvider>());
 }
 
 bool QmlJSEditor::isDesignModePreferred() const
@@ -66,10 +67,5 @@ bool QmlJSEditor::isDesignModePreferred() const
     return false;
 }
 
-TextEditor::CompletionAssistProvider *QmlJSEditor::completionAssistProvider()
-{
-    return ExtensionSystem::PluginManager::getObject<Internal::QmlJSCompletionAssistProvider>();
-}
-
 } // namespace Internal
 } // namespace QmlJSEditor

src/plugins/qmljseditor/qmljseditoreditable.h

@@ -49,8 +49,6 @@ public:
     Core::IEditor *duplicate();
     bool open(QString *errorString, const QString &fileName, const QString &realFileName);
     bool isDesignModePreferred() const;
-
-    TextEditor::CompletionAssistProvider *completionAssistProvider();
 };
 
 } // namespace Internal

src/plugins/texteditor/basetexteditor.cpp

@@ -198,6 +198,7 @@ public:
     QAction *m_fileEncodingLabelAction;
     Utils::LineColumnLabel *m_fileEncodingLabel;
     CommentDefinition m_commentDefinition;
+    std::function<CompletionAssistProvider *()> m_completionAssistProvider;
 };
 
 class BaseTextEditorWidgetPrivate
@@ -6447,6 +6448,8 @@ BaseTextEditor::BaseTextEditor(BaseTextEditorWidget *editor)
     d->m_cursorPositionLabelAction = d->m_toolBar->addWidget(d->m_cursorPositionLabel);
     d->m_fileEncodingLabelAction = d->m_toolBar->addWidget(d->m_fileEncodingLabel);
 
+    d->m_completionAssistProvider = [] () -> CompletionAssistProvider * { return 0; };
+
     setFileEncodingLabelVisible(editor->displaySettings().m_displayFileEncoding);
     connect(editor, SIGNAL(cursorPositionChanged()), this, SLOT(updateCursorPosition()));
     connect(d->m_cursorPositionLabel, SIGNAL(clicked()), this, SLOT(openGotoLocator()));
@@ -6587,7 +6590,17 @@ void BaseTextEditor::setCommentStyle(CommentDefinition::Style style)
 
 CompletionAssistProvider *BaseTextEditor::completionAssistProvider()
 {
-    return 0;
+    return d->m_completionAssistProvider();
+}
+
+void BaseTextEditor::setCompletionAssistProvider(CompletionAssistProvider *provider)
+{
+    d->m_completionAssistProvider = [provider] () -> CompletionAssistProvider * { return provider; };
+}
+
+void BaseTextEditor::setCompletionAssistProvider(const std::function<CompletionAssistProvider *()> &provider)
+{
+    d->m_completionAssistProvider = provider;
 }
 
 QObject *BaseTextEditor::fileEncodingLabel() const

src/plugins/texteditor/basetexteditor.h

@@ -42,6 +42,7 @@
 #include <utils/uncommentselection.h>
 
 #include <QPlainTextEdit>
+#include <functional>
 
 QT_BEGIN_NAMESPACE
 class QToolBar;
@@ -185,7 +186,12 @@ public:
     /*! Convenience style setter. */
     void setCommentStyle(Utils::CommentDefinition::Style style);
 
-    virtual CompletionAssistProvider *completionAssistProvider();
+    CompletionAssistProvider *completionAssistProvider();
+    void setCompletionAssistProvider(CompletionAssistProvider *provider); // Not owned.
+
+    // FIXME: Only used to delay initialization from CppEditor.
+    // There should be something simpler.
+    void setCompletionAssistProvider(const std::function<CompletionAssistProvider *()> &provider);
 
     QObject *fileEncodingLabel() const; // FIXME: Remove