Add more tracing options to debug UI messages

Added REPORT_MOUSE/PAINT/TIMER_MESSAGES macros, and change _EVENTS to
_MESSAGES to avoid confusion with the current terminology.

The output string for each message was also simplified.

src/ui/CMakeLists.txt

@@ -63,4 +63,5 @@ target_link_libraries(ui-lib
   laf-os
   laf-gfx
   laf-base
-  obs)
+  obs
+  fmt)

src/ui/manager.cpp

@@ -5,11 +5,14 @@
 // This file is released under the terms of the MIT license.
 // Read LICENSE.txt for more information.
 
-// #define REPORT_EVENTS
-// #define REPORT_FOCUS_MOVEMENT
-// #define DEBUG_PAINT_EVENTS
-// #define LIMIT_DISPATCH_TIME
-#define GARBAGE_TRACE(...)
+// #define REPORT_MESSAGES           1
+// #define REPORT_MOUSE_MESSAGES     1
+// #define REPORT_PAINT_MESSAGES     1
+// #define REPORT_TIMER_MESSAGES     1
+// #define REPORT_FOCUS_MOVEMENT     1
+// #define DEBUG_PAINT_MESSAGES      1
+// #define LIMIT_DISPATCH_TIME       1
+#define GARBAGE_TRACE(...) // TRACE(__VA_ARGS__)
 
 #ifdef HAVE_CONFIG_H
 #include "config.h"
@@ -21,6 +24,7 @@
 #include "base/scoped_value.h"
 #include "base/thread.h"
 #include "base/time.h"
+#include "fmt/format.h"
 #include "os/event.h"
 #include "os/event_queue.h"
 #include "os/surface.h"
@@ -38,7 +42,7 @@
 #include <utility>
 #include <vector>
 
-#if defined(_WIN32) && defined(DEBUG_PAINT_EVENTS)
+#if defined(_WIN32) && defined(DEBUG_PAINT_MESSAGES)
   #define WIN32_LEAN_AND_MEAN
   #include <windows.h>
   #undef min
@@ -989,7 +993,7 @@ void Manager::setFocus(Widget* widget)
 
 void Manager::setMouse(Widget* widget)
 {
-#ifdef REPORT_EVENTS
+#if REPORT_MOUSE_MESSAGES
   TRACEARGS("Manager::setMouse ",
             (widget ? typeid(*widget).name(): "null"),
             (widget ? widget->id(): ""));
@@ -1812,13 +1816,13 @@ int Manager::pumpQueue()
 {
   ASSERT(manager_thread == std::this_thread::get_id());
 
-#ifdef LIMIT_DISPATCH_TIME
+#if LIMIT_DISPATCH_TIME
   base::tick_t t = base::current_tick();
 #endif
 
   int count = 0;                // Number of processed messages
   while (!msg_queue.empty()) {
-#ifdef LIMIT_DISPATCH_TIME
+#if LIMIT_DISPATCH_TIME
     if (base::current_tick()-t > 250)
       break;
 #endif
@@ -1887,7 +1891,7 @@ bool Manager::sendMessageToWidget(Message* msg, Widget* widget)
   if (!widget)
     return false;
 
-#ifdef REPORT_EVENTS
+#if REPORT_MESSAGES
   {
     static const char* msg_name[] = {
       "kOpenMessage",
@@ -1918,15 +1922,38 @@ bool Manager::sendMessageToWidget(Message* msg, Widget* widget)
     static_assert(kOpenMessage == 0 &&
                   kCallbackMessage == sizeof(msg_name)/sizeof(const char*)-1,
                   "MessageType enum has changed");
-    const char* string =
+    const char* messageStr =
       (msg->type() >= 0 &&
        msg->type() < sizeof(msg_name)/sizeof(const char*)) ?
       msg_name[msg->type()]: "Unknown";
 
-    TRACEARGS("Event", msg->type(), "(", string, ")",
-              "for", ((void*)widget),
-              typeid(*widget).name(),
-              widget->id().empty());
+    if (
+#if !REPORT_MOUSE_MESSAGES
+        (msg->type() < kMouseDownMessage ||
+         msg->type() > kTouchMagnifyMessage) &&
+#endif
+#if !REPORT_PAINT_MESSAGES
+        (msg->type() != kPaintMessage) &&
+#endif
+#if !REPORT_TIMER_MESSAGES
+        (msg->type() != kTimerMessage) &&
+#endif
+        true)
+    {
+      TRACEARGS(fmt::format(
+        "-- {} ({}) for {} {}{}{} --",
+        messageStr,
+        (int)msg->type(),
+        ((void*)widget),
+        typeid(*widget).name(),
+        !widget->id().empty() ? " " + widget->id() : "",
+  #if REPORT_PAINT_MESSAGES
+        (msg->type() == kPaintMessage) ?
+          " clipRect=" +
+            base_args_to_string(static_cast<PaintMessage*>(msg)->rect()) :
+  #endif
+          ""));
+    }
   }
 #endif
 
@@ -1953,11 +1980,7 @@ bool Manager::sendMessageToWidget(Message* msg, Widget* widget)
     surface->saveClip();
 
     if (surface->clipRect(paintMsg->rect())) {
-#ifdef REPORT_EVENTS
-      TRACEARGS(" - clipRect ", paintMsg->rect());
-#endif
-
-#ifdef DEBUG_PAINT_EVENTS
+#if DEBUG_PAINT_MESSAGES
       {
         os::SurfaceLock lock(surface.get());
         os::Paint p;
@@ -2280,7 +2303,7 @@ bool Manager::processFocusMovementMessage(Message* msg)
             }
           }
 
-#ifdef REPORT_FOCUS_MOVEMENT
+#if REPORT_FOCUS_MOVEMENT
           // Print list of widgets
           for (int i=c; i<count-1; ++i) {
             TRACE("list[%d] = %d (%s)\n",