fix(graph): persist viewport while navigating

include/views/main_window.h

@@ -125,6 +125,7 @@ typedef void (*MainWindowGraphNodeMovedCallback)(
     double y,
     gpointer user_data
 );
+typedef void (*MainWindowGraphTransformChangedCallback)(gpointer user_data);
 
 typedef void (*MainWindowExtractionDropCallback)(
     const char *file_path,
@@ -251,6 +252,10 @@ void main_window_set_graph_node_moved_callback(
     MainWindowGraphNodeMovedCallback callback,
     gpointer user_data
 );
+void main_window_set_graph_transform_changed_callback(
+    MainWindow *main_window,
+    MainWindowGraphTransformChangedCallback callback,
+    gpointer user_data);
 
 void main_window_set_extraction_drop_callback(
     MainWindow *main_window,

include/widgets/investigation_graph_view.h

@@ -71,6 +71,10 @@ typedef void (*InvestigationGraphViewNodeMovedCallback)(
     gpointer user_data
 );
 
+typedef void (*InvestigationGraphViewTransformChangedCallback)(
+    gpointer user_data
+);
+
 /** @brief Callback appelé lorsqu'une extraction est déposée sur le graphe. */
 typedef void (*InvestigationGraphViewExtractionDropCallback)(
     const char *file_path,
@@ -177,6 +181,12 @@ void investigation_graph_view_set_node_moved_callback(
     gpointer user_data
 );
 
+void investigation_graph_view_set_transform_changed_callback(
+    InvestigationGraphView *graph_view,
+    InvestigationGraphViewTransformChangedCallback callback,
+    gpointer user_data
+);
+
 void investigation_graph_view_set_extraction_drop_callback(
     InvestigationGraphView *graph_view,
     InvestigationGraphViewExtractionDropCallback callback,

include/widgets/workspace.h

@@ -55,6 +55,7 @@ typedef void (*WorkspaceGraphNodeMovedCallback)(
     double y,
     gpointer user_data
 );
+typedef void (*WorkspaceGraphTransformChangedCallback)(gpointer user_data);
 
 typedef void (*WorkspaceExtractionDropCallback)(
     const char *file_path,
@@ -324,6 +325,10 @@ void workspace_set_graph_node_moved_callback(
     WorkspaceGraphNodeMovedCallback callback,
     gpointer user_data
 );
+void workspace_set_graph_transform_changed_callback(
+    Workspace *workspace,
+    WorkspaceGraphTransformChangedCallback callback,
+    gpointer user_data);
 
 void workspace_set_extraction_drop_callback(
     Workspace *workspace,

src/core/application.c

@@ -138,6 +138,7 @@ struct Application
     InvestigationGraphLayout *graph_layout;
     guint64 graph_load_generation;
     gboolean graph_viewport_restored;
+    guint graph_viewport_save_source_id;
 
     char *selected_evidence_identifier;
     char *pending_relation_selection_identifier;
@@ -278,6 +279,25 @@ static void application_save_graph_viewport(Application *application)
     g_clear_error(&error);
 }
 
+static gboolean application_save_graph_viewport_timeout(gpointer user_data)
+{
+    Application *application = user_data;
+    if (application == NULL) return G_SOURCE_REMOVE;
+    application->graph_viewport_save_source_id = 0U;
+    application_save_graph_viewport(application);
+    return G_SOURCE_REMOVE;
+}
+
+static void application_on_graph_transform_changed(gpointer user_data)
+{
+    Application *application = user_data;
+    if (application == NULL) return;
+    if (application->graph_viewport_save_source_id != 0U)
+        g_source_remove(application->graph_viewport_save_source_id);
+    application->graph_viewport_save_source_id = g_timeout_add(
+        250U, application_save_graph_viewport_timeout, application);
+}
+
 static void application_restore_graph_viewport(Application *application)
 {
     GraphNodePositionDao *dao = NULL;
@@ -2665,6 +2685,11 @@ static gboolean application_install_session(
         application->tree_model
     );
 
+    if (application->graph_viewport_save_source_id != 0U)
+    {
+        g_source_remove(application->graph_viewport_save_source_id);
+        application->graph_viewport_save_source_id = 0U;
+    }
     application_save_graph_viewport(application);
     investigation_session_close(
         application->session
@@ -7841,6 +7866,10 @@ static void application_on_activate(
         application_on_graph_node_moved,
         application
     );
+    main_window_set_graph_transform_changed_callback(
+        application->main_window,
+        application_on_graph_transform_changed,
+        application);
     main_window_set_extraction_drop_callback(
         application->main_window, application_on_extraction_dropped,
         application);
@@ -8126,6 +8155,11 @@ void application_free(
         application
     );
 
+    if (application->graph_viewport_save_source_id != 0U)
+    {
+        g_source_remove(application->graph_viewport_save_source_id);
+        application->graph_viewport_save_source_id = 0U;
+    }
     application_save_graph_viewport(application);
 
     application_clear_graph(

src/views/main_window.c

@@ -125,6 +125,8 @@ struct MainWindow
 
     gpointer
         graph_node_moved_user_data;
+    MainWindowGraphTransformChangedCallback graph_transform_changed_callback;
+    gpointer graph_transform_changed_user_data;
 
     MainWindowExtractionDropCallback extraction_drop_callback;
     gpointer extraction_drop_user_data;
@@ -514,6 +516,15 @@ static void main_window_on_graph_node_moved(
     );
 }
 
+static void main_window_on_graph_transform_changed(gpointer user_data)
+{
+    MainWindow *main_window = user_data;
+    if (main_window != NULL &&
+        main_window->graph_transform_changed_callback != NULL)
+        main_window->graph_transform_changed_callback(
+            main_window->graph_transform_changed_user_data);
+}
+
 static void main_window_on_extraction_dropped(const char *file_path,
     const char *target_entity_identifier, gpointer user_data)
 {
@@ -978,6 +989,9 @@ MainWindow *main_window_new(
         main_window_on_graph_node_moved,
         main_window
     );
+    workspace_set_graph_transform_changed_callback(
+        main_window->workspace, main_window_on_graph_transform_changed,
+        main_window);
     workspace_set_extraction_drop_callback(main_window->workspace,
         main_window_on_extraction_dropped, main_window);
 
@@ -1803,6 +1817,16 @@ void main_window_set_graph_node_moved_callback(
         user_data;
 }
 
+void main_window_set_graph_transform_changed_callback(
+    MainWindow *main_window,
+    MainWindowGraphTransformChangedCallback callback,
+    gpointer user_data)
+{
+    if (main_window == NULL) return;
+    main_window->graph_transform_changed_callback = callback;
+    main_window->graph_transform_changed_user_data = user_data;
+}
+
 void main_window_set_extraction_drop_callback(
     MainWindow *main_window,
     MainWindowExtractionDropCallback callback,
@@ -2070,6 +2094,8 @@ void main_window_free(
             NULL,
             NULL
         );
+        workspace_set_graph_transform_changed_callback(
+            main_window->workspace, NULL, NULL);
 
         workspace_set_reset_graph_layout_callback(
             main_window->workspace,

src/widgets/investigation_graph_view.c

@@ -121,6 +121,8 @@ struct InvestigationGraphView
 
     InvestigationGraphViewNodeMovedCallback node_moved_callback;
     gpointer node_moved_user_data;
+    InvestigationGraphViewTransformChangedCallback transform_changed_callback;
+    gpointer transform_changed_user_data;
     InvestigationGraphViewExtractionDropCallback extraction_drop_callback;
     gpointer extraction_drop_user_data;
 
@@ -317,6 +319,10 @@ static void investigation_graph_view_zoom_at_point(
     gtk_widget_queue_draw(
         graph_view->drawing_area
     );
+
+    if (graph_view->transform_changed_callback != NULL)
+        graph_view->transform_changed_callback(
+            graph_view->transform_changed_user_data);
 }
 
 /**
@@ -513,6 +519,10 @@ static void investigation_graph_view_on_scale_changed(
     gtk_widget_queue_draw(
         graph_view->drawing_area
     );
+
+    if (graph_view->transform_changed_callback != NULL)
+        graph_view->transform_changed_callback(
+            graph_view->transform_changed_user_data);
 }
 
 /**
@@ -1201,6 +1211,10 @@ static void investigation_graph_view_on_drag_update(
             graph_view->drag_origin_offset_y +
             offset_y;
 
+        if (graph_view->transform_changed_callback != NULL)
+            graph_view->transform_changed_callback(
+                graph_view->transform_changed_user_data);
+
         gtk_widget_queue_draw(
             graph_view->drawing_area
         );
@@ -4462,6 +4476,16 @@ void investigation_graph_view_set_node_moved_callback(
         user_data;
 }
 
+void investigation_graph_view_set_transform_changed_callback(
+    InvestigationGraphView *graph_view,
+    InvestigationGraphViewTransformChangedCallback callback,
+    gpointer user_data)
+{
+    if (graph_view == NULL) return;
+    graph_view->transform_changed_callback = callback;
+    graph_view->transform_changed_user_data = user_data;
+}
+
 void investigation_graph_view_set_extraction_drop_callback(
     InvestigationGraphView *graph_view,
     InvestigationGraphViewExtractionDropCallback callback,

src/widgets/workspace.c

@@ -128,6 +128,8 @@ struct Workspace
 
     gpointer
         graph_node_moved_user_data;
+    WorkspaceGraphTransformChangedCallback graph_transform_changed_callback;
+    gpointer graph_transform_changed_user_data;
 
     WorkspaceExtractionDropCallback extraction_drop_callback;
     gpointer extraction_drop_user_data;
@@ -749,6 +751,14 @@ static void workspace_on_graph_node_moved(
     );
 }
 
+static void workspace_on_graph_transform_changed(gpointer user_data)
+{
+    Workspace *workspace = user_data;
+    if (workspace != NULL && workspace->graph_transform_changed_callback != NULL)
+        workspace->graph_transform_changed_callback(
+            workspace->graph_transform_changed_user_data);
+}
+
 /**
  * @brief Transmet la sélection du graphe au volet de détails.
  */
@@ -1966,6 +1976,8 @@ Workspace *workspace_new(void)
         workspace_on_graph_node_moved,
         workspace
     );
+    investigation_graph_view_set_transform_changed_callback(
+        workspace->graph_view, workspace_on_graph_transform_changed, workspace);
     investigation_graph_view_set_extraction_drop_callback(
         workspace->graph_view, workspace_on_extraction_dropped, workspace);
 
@@ -3473,6 +3485,16 @@ void workspace_set_graph_node_moved_callback(
         user_data;
 }
 
+void workspace_set_graph_transform_changed_callback(
+    Workspace *workspace,
+    WorkspaceGraphTransformChangedCallback callback,
+    gpointer user_data)
+{
+    if (workspace == NULL) return;
+    workspace->graph_transform_changed_callback = callback;
+    workspace->graph_transform_changed_user_data = user_data;
+}
+
 void workspace_set_extraction_drop_callback(
     Workspace *workspace,
     WorkspaceExtractionDropCallback callback,
@@ -3680,6 +3702,8 @@ void workspace_free(Workspace *workspace)
         NULL,
         NULL
     );
+    investigation_graph_view_set_transform_changed_callback(
+        workspace->graph_view, NULL, NULL);
 
     entity_details_panel_set_close_callback(
         workspace->entity_details_panel,