Add new Outline sidebar pane

Adds a generic Outline pane to the sidebar. The CppEditor & QmlJSEditor
plugins will implement the IOutlineWidget/IOutlineWidgetFactory interface to
provide views specific to C++/Qml/JS documents.

Reviewed-by: con

src/plugins/texteditor/outlinefactory.cpp

@@ -0,0 +1,123 @@
+#include "outlinefactory.h"
+#include <coreplugin/editormanager/editormanager.h>
+#include <coreplugin/editormanager/ieditor.h>
+#include <QVBoxLayout>
+#include <QDebug>
+#include <QToolButton>
+#include <QLabel>
+#include <QStackedWidget>
+
+namespace TextEditor {
+namespace Internal {
+
+OutlineWidgetStack::OutlineWidgetStack(OutlineFactory *factory) :
+    QStackedWidget(),
+    m_factory(factory),
+    m_syncWithEditor(true)
+{
+    QLabel *label = new QLabel(tr("No outline available"), this);
+    label->setAlignment(Qt::AlignCenter);
+    addWidget(label);
+
+    m_toggleSync = new QToolButton;
+    m_toggleSync->setIcon(QIcon(":/core/images/linkicon.png"));
+    m_toggleSync->setCheckable(true);
+    m_toggleSync->setChecked(true);
+    m_toggleSync->setToolTip(tr("Synchronize with Editor"));
+    connect(m_toggleSync, SIGNAL(clicked(bool)), this, SLOT(toggleCursorSynchronization()));
+
+    Core::EditorManager *editorManager = Core::EditorManager::instance();
+    connect(editorManager, SIGNAL(currentEditorChanged(Core::IEditor*)),
+            this, SLOT(updateCurrentEditor(Core::IEditor*)));
+    updateCurrentEditor(editorManager->currentEditor());
+}
+
+OutlineWidgetStack::~OutlineWidgetStack()
+{
+}
+
+QToolButton *OutlineWidgetStack::toggleSyncButton()
+{
+    return m_toggleSync;
+}
+
+bool OutlineWidgetStack::isCursorSynchronized() const
+{
+    return m_syncWithEditor;
+}
+
+void OutlineWidgetStack::toggleCursorSynchronization()
+{
+    m_syncWithEditor = !m_syncWithEditor;
+    if (IOutlineWidget *outlineWidget = qobject_cast<IOutlineWidget*>(currentWidget()))
+        outlineWidget->setCursorSynchronization(m_syncWithEditor);
+}
+
+void OutlineWidgetStack::updateCurrentEditor(Core::IEditor *editor)
+{
+    IOutlineWidget *newWidget = 0;
+
+    if (editor) {
+        foreach (IOutlineWidgetFactory *widgetFactory, m_factory->widgetFactories()) {
+            if (widgetFactory->supportsEditor(editor)) {
+                newWidget = widgetFactory->createWidget(editor);
+                break;
+            }
+        }
+    }
+
+    if (newWidget != currentWidget()) {
+        // delete old widget
+        if (IOutlineWidget *outlineWidget = qobject_cast<IOutlineWidget*>(currentWidget())) {
+            removeWidget(outlineWidget);
+            delete outlineWidget;
+        }
+        if (newWidget) {
+            newWidget->setCursorSynchronization(m_syncWithEditor);
+            addWidget(newWidget);
+            setCurrentWidget(newWidget);
+        }
+    }
+}
+
+OutlineFactory::OutlineFactory() :
+    Core::INavigationWidgetFactory()
+{
+}
+
+QList<IOutlineWidgetFactory*> OutlineFactory::widgetFactories() const
+{
+    return m_factories;
+}
+
+void OutlineFactory::setWidgetFactories(QList<IOutlineWidgetFactory*> factories)
+{
+    m_factories = factories;
+}
+
+QString OutlineFactory::displayName() const
+{
+    return tr("Outline");
+}
+
+QString OutlineFactory::id() const
+{
+    return QLatin1String("Outline");
+}
+
+QKeySequence OutlineFactory::activationSequence() const
+{
+    return QKeySequence();
+}
+
+Core::NavigationView OutlineFactory::createWidget()
+{
+    Core::NavigationView n;
+    OutlineWidgetStack *placeHolder = new OutlineWidgetStack(this);
+    n.widget = placeHolder;
+    n.dockToolBarWidgets.append(placeHolder->toggleSyncButton());
+    return n;
+}
+
+} // namespace Internal
+} // namespace TextEditor