From cf64d46bbebe636649cfd12c768aae31ef707bdb Mon Sep 17 00:00:00 2001
From: Eike Ziller <eike.ziller@qt.io>
Date: Mon, 27 May 2024 11:44:17 +0200
Subject: [PATCH] Markdown: Implement navigation history

The text editor widget now tells us when it thinks a new navigation
point should be added, so do it.

Change-Id: I20e65134420cb1d94d7bc5310791d07ff951647c
Reviewed-by: David Schulz <david.schulz@qt.io>
---
 src/plugins/texteditor/markdowneditor.cpp | 28 +++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/src/plugins/texteditor/markdowneditor.cpp b/src/plugins/texteditor/markdowneditor.cpp
index c08fedeb104..93b580a935e 100644
--- a/src/plugins/texteditor/markdowneditor.cpp
+++ b/src/plugins/texteditor/markdowneditor.cpp
@@ -110,6 +110,21 @@ public:
         m_textEditorWidget->setTextDocument(m_document);
         m_textEditorWidget->setupGenericHighlighter();
         m_textEditorWidget->setMarksVisible(false);
+        QObject::connect(
+            m_textEditorWidget,
+            &TextEditorWidget::saveCurrentStateForNavigationHistory,
+            this,
+            &MarkdownEditor::saveCurrentStateForNavigationHistory);
+        QObject::connect(
+            m_textEditorWidget,
+            &TextEditorWidget::addSavedStateToNavigationHistory,
+            this,
+            &MarkdownEditor::addSavedStateToNavigationHistory);
+        QObject::connect(
+            m_textEditorWidget,
+            &TextEditorWidget::addCurrentStateToNavigationHistory,
+            this,
+            &MarkdownEditor::addCurrentStateToNavigationHistory);
         auto context = new IContext(this);
         context->setWidget(m_textEditorWidget);
         context->setContext(Context(MARKDOWNVIEWER_TEXT_CONTEXT));
@@ -476,6 +491,18 @@ private:
         }
     }
 
+    void saveCurrentStateForNavigationHistory() { m_savedNavigationState = saveState(); }
+
+    void addSavedStateToNavigationHistory()
+    {
+        EditorManager::addCurrentPositionToNavigationHistory(m_savedNavigationState);
+    }
+
+    void addCurrentStateToNavigationHistory()
+    {
+        EditorManager::addCurrentPositionToNavigationHistory();
+    }
+
 private:
     QTimer m_previewTimer;
     bool m_performDelayedUpdate = false;
@@ -491,6 +518,7 @@ private:
     QAction *m_togglePreviewVisibleAction;
     QAction *m_swapViewsAction;
     std::optional<QPoint> m_previewRestoreScrollPosition;
+    QByteArray m_savedNavigationState;
 };
 
 class MarkdownEditorFactory final : public IEditorFactory