feat(toolbox): add remove_data_source runtime-host slot; release 0.7.0

Add an optional tail slot remove_data_source(handle) to
PJ_toolbox_runtime_host_vtable_t so a toolbox can ask the host to drop a
data source it created via create_data_source — its derived topics leave
the catalog, enabling a clean reset that leaves no residue. Mirrors the
existing notify_data_changed control-plane callback.

ABI: slot is tail-appended after notify_data_changed and marked
OPTIONAL; hosts may omit it. ToolboxRuntimeHostView::removeDataSource()
guards the read with PJ_HAS_TAIL_SLOT (struct_size + nullability), so a
new plugin on an older host no-ops, and an older plugin never calls it.
ABI-appendable → backward compatible, no recompile needed for existing
plugins.

toolbox_plugin_test: the runtime-host vtable initializer gains
.remove_data_source = nullptr (the test does not exercise it).

Release: MINOR bump 0.6.0 -> 0.7.0 (version in conanfile.py and
CMakeLists.txt PJ_PACKAGE_VERSION, plus the conanfile docstring
example). abi/baseline.abi is unchanged (it moves only on MAJOR); CI's
abidiff must confirm additions-only against the existing baseline.

Author: pabloinigoblasco

CMakeLists.txt

@@ -111,7 +111,7 @@ endif()
 if(PJ_INSTALL_SDK)
   include(CMakePackageConfigHelpers)
 
-  set(PJ_PACKAGE_VERSION "0.6.0")
+  set(PJ_PACKAGE_VERSION "0.7.0")
   set(PJ_PACKAGE_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/plotjuggler_sdk)
 
   install(EXPORT plotjuggler_sdkTargets

conanfile.py

@@ -6,7 +6,7 @@
   plugin_sdk   — umbrella for plugin authors (base + dialog SDK + parser SDK)
   plugin_host  — umbrella for host loaders (data_source/parser/toolbox/dialog)
 
-A consuming Conan recipe declares e.g. `plotjuggler_sdk/0.6.0` and then:
+A consuming Conan recipe declares e.g. `plotjuggler_sdk/0.7.0` and then:
 
     find_package(plotjuggler_sdk REQUIRED COMPONENTS plugin_sdk)
     target_link_libraries(my_plugin PRIVATE plotjuggler_sdk::plugin_sdk)
@@ -30,7 +30,7 @@
 
 class PlotjugglerSdkConan(ConanFile):
     name = "plotjuggler_sdk"
-    version = "0.6.0"
+    version = "0.7.0"
     # Apache-2.0 covers the whole SDK (pj_base + pj_plugins). See LICENSE.
     license = "Apache-2.0"
     url = "https://github.com/PlotJuggler/plotjuggler_sdk"

pj_base/include/pj_base/sdk/toolbox_plugin_base.hpp

@@ -56,6 +56,14 @@ class ToolboxRuntimeHostView {
     }
   }
 
+  /// Ask the host to remove a data source this toolbox created (its derived
+  /// topics leave the catalog). No-op on hosts that predate this slot.
+  void removeDataSource(PJ_data_source_handle_t handle) const {
+    if (valid() && PJ_HAS_TAIL_SLOT(PJ_toolbox_runtime_host_vtable_t, host_.vtable, remove_data_source)) {
+      host_.vtable->remove_data_source(host_.ctx, handle);
+    }
+  }
+
   [[nodiscard]] const PJ_toolbox_runtime_host_t& raw() const {
     return host_;
   }

pj_base/include/pj_base/toolbox_protocol.h

@@ -74,6 +74,19 @@ typedef struct PJ_toolbox_runtime_host_vtable_t {
 
   /** [thread-safe] Notify the host that data has been modified; host refreshes UI. */
   void (*notify_data_changed)(void* ctx) PJ_NOEXCEPT;
+
+  /* ====================================================================
+   * Tail slots beyond here are OPTIONAL (added after v4.0). Plugins MUST
+   * guard reads via PJ_HAS_TAIL_SLOT(struct_size + nullability).
+   * ==================================================================== */
+
+  /** [thread-safe] Remove a data source the toolbox previously created via the
+   *  write host's create_data_source, so its derived topics disappear from the
+   *  host catalog — a clean reset that leaves no residue. The host tombstones
+   *  the data source's topics; cached reader handles are not invalidated.
+   *  Optional tail slot: hosts may omit it, so plugins guard with
+   *  PJ_HAS_TAIL_SLOT(PJ_toolbox_runtime_host_vtable_t, vtable, remove_data_source). */
+  void (*remove_data_source)(void* ctx, PJ_data_source_handle_t handle) PJ_NOEXCEPT;
 } PJ_toolbox_runtime_host_vtable_t;
 
 typedef struct {

pj_plugins/tests/toolbox_plugin_test.cpp

@@ -103,6 +103,7 @@ PJ_toolbox_runtime_host_t makeRuntimeHost(RuntimeState* state) {
       .struct_size = sizeof(PJ_toolbox_runtime_host_vtable_t),
       .report_message = rhReportMessage,
       .notify_data_changed = rhNotifyDataChanged,
+      .remove_data_source = nullptr,
   };
   return PJ_toolbox_runtime_host_t{.ctx = state, .vtable = &vtable};
 }