Lua: Add possibility to insert action to toolbar

Change-Id: I04ccfdcc28ed33e03f8a3c531d775741d35fac7f
Reviewed-by: Marcus Tillmanns <marcus.tillmanns@qt.io>
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/lua/bindings/texteditor.cpp

@@ -427,6 +427,13 @@ void setupTextEditorModule()
                 QTC_ASSERT(textEditor, throw sol::error("TextEditor is not valid"));
                 textEditor->editorWidget()->insertExtraToolBarWidget(side, toWidget(widget));
             },
+            "insertExtraToolBarAction",
+            [](const TextEditorPtr &textEditor,
+               TextEditorWidget::Side side,
+               QAction* action) {
+                QTC_ASSERT(textEditor, throw sol::error("TextEditor is not valid"));
+                textEditor->editorWidget()->insertExtraToolBarAction(side, action);
+            },
             "setRefactorMarker",
             [pluginSpec, activeMarkers](
                 const TextEditorPtr &textEditor,

src/plugins/texteditor/texteditor.cpp

@@ -9887,6 +9887,23 @@ QAction * TextEditorWidget::insertExtraToolBarWidget(TextEditorWidget::Side side
     }
 }
 
+void TextEditorWidget::insertExtraToolBarAction(TextEditorWidget::Side side, QAction *action)
+{
+    if (side == Left) {
+        auto findLeftMostAction = [this](QAction *action) {
+            if (d->m_toolbarOutlineAction && action == d->m_toolbarOutlineAction)
+                return false;
+            return d->m_toolBar->widgetForAction(action) != nullptr;
+        };
+        QAction *before = Utils::findOr(d->m_toolBar->actions(),
+                                        d->m_fileEncodingLabelAction,
+                                        findLeftMostAction);
+        d->m_toolBar->insertAction(before, action);
+    } else {
+        d->m_toolBar->insertAction(d->m_fileLineEndingAction, action);
+    }
+}
+
 void TextEditorWidget::setToolbarOutline(QWidget *widget)
 {
     if (d->m_toolbarOutlineAction) {

src/plugins/texteditor/texteditor.h

@@ -351,6 +351,7 @@ public:
 
     enum Side { Left, Right };
     QAction *insertExtraToolBarWidget(Side side, QWidget *widget);
+    void insertExtraToolBarAction(Side side, QAction *action);
     void setToolbarOutline(QWidget* widget);
     const QWidget *toolbarOutlineWidget();