Internals: add SetContextName() helper. (#9097)

Amend 37c243b.

imgui.cpp

@@ -4443,6 +4443,13 @@ void ImGui::Shutdown()
     g.Initialized = false;
 }
 
+// When using multiple context it can be helpful to give name a name.
+// (A) Will be visible in debugger, (B) Will be included in all IMGUI_DEBUG_LOG() calls, (C) Should be <= 15 characters long.
+void ImGui::SetContextName(ImGuiContext* ctx, const char* name)
+{
+    ImStrncpy(ctx->ContextName, name, IM_ARRAYSIZE(ctx->ContextName));
+}
+
 // No specific ordering/dependency support, will see as needed
 ImGuiID ImGui::AddContextHook(ImGuiContext* ctx, const ImGuiContextHook* hook)
 {

imgui_internal.h

@@ -3193,6 +3193,12 @@ namespace ImGui
     IMGUI_API void          Initialize();
     IMGUI_API void          Shutdown();    // Since 1.60 this is a _private_ function. You can call DestroyContext() to destroy the context created by CreateContext().
 
+    // Context name & generic context hooks
+    IMGUI_API void          SetContextName(ImGuiContext* ctx, const char* name);
+    IMGUI_API ImGuiID       AddContextHook(ImGuiContext* ctx, const ImGuiContextHook* hook);
+    IMGUI_API void          RemoveContextHook(ImGuiContext* ctx, ImGuiID hook_to_remove);
+    IMGUI_API void          CallContextHooks(ImGuiContext* ctx, ImGuiContextHookType type);
+
     // NewFrame
     IMGUI_API void          UpdateInputEvents(bool trickle_fast_inputs);
     IMGUI_API void          UpdateHoveredWindowAndCaptureFlags(const ImVec2& mouse_pos);
@@ -3202,11 +3208,6 @@ namespace ImGui
     IMGUI_API void          UpdateMouseMovingWindowNewFrame();
     IMGUI_API void          UpdateMouseMovingWindowEndFrame();
 
-    // Generic context hooks
-    IMGUI_API ImGuiID       AddContextHook(ImGuiContext* context, const ImGuiContextHook* hook);
-    IMGUI_API void          RemoveContextHook(ImGuiContext* context, ImGuiID hook_to_remove);
-    IMGUI_API void          CallContextHooks(ImGuiContext* context, ImGuiContextHookType type);
-
     // Viewports
     IMGUI_API void          ScaleWindowsInViewport(ImGuiViewportP* viewport, float scale);
     IMGUI_API void          SetWindowViewport(ImGuiWindow* window, ImGuiViewportP* viewport);