Some work on resizability and resize request on Mac (#209)

- Implmenet gui_can_resize etc... properly
- Have a callback so various hosts can do request_resize properly

With this short circuit zoom menu works on the clap-wraper side
even though the short circuit side and clap juce shim is still
kinda broken

src/detail/standalone/macos/AppDelegate.mm

@@ -4,6 +4,7 @@
 
 #include "detail/standalone/entry.h"
 #include "detail/standalone/standalone_details.h"
+#include "detail/standalone/standalone_host.h"
 
 #include "detail/clap/fsutil.h"
 
@@ -102,6 +103,15 @@ - (void)applicationDidFinishLaunching:(NSNotification *)aNotification
     ui->show(p);
   }
 
+  freeaudio::clap_wrapper::standalone::getStandaloneHost()->onRequestResize =
+      [self](uint32_t w, uint32_t h)
+  {
+    NSSize sz;
+    sz.width = w;
+    sz.height = h;
+    [[self window] setContentSize:sz];
+    return false;
+  };
   freeaudio::clap_wrapper::standalone::mainStartAudio();
 }
 

src/detail/standalone/standalone_host.cpp

@@ -61,15 +61,15 @@ void StandaloneHost::setupAudioBusses(const clap_plugin_t *plugin,
   for (auto i = 0U; i < numAudioInputs; ++i)
   {
     audioports->get(plugin, i, true, &info);
-    LOG << "  - input " << i << " " << info.name << std::endl;
+    // LOG << "  - input " << i << " " << info.name << std::endl;
     inputChannelByBus.push_back(info.channel_count);
     totalInputChannels += info.channel_count;
     if (info.flags & CLAP_AUDIO_PORT_IS_MAIN) mainInput = i;
   }
   for (auto i = 0U; i < numAudioOutputs; ++i)
   {
     audioports->get(plugin, i, false, &info);
-    LOG << "  - output " << i << " " << info.name << std::endl;
+    // LOG << "  - output " << i << " " << info.name << std::endl;
     outputChannelByBus.push_back(info.channel_count);
     totalOutputChannels += info.channel_count;
     if (info.flags & CLAP_AUDIO_PORT_IS_MAIN) mainOutput = i;
@@ -218,6 +218,26 @@ void StandaloneHost::clapProcess(void *pOutput, const void *pInput, uint32_t fra
   }
 }
 
+bool StandaloneHost::gui_can_resize()
+{
+  if (!clapPlugin) return false;
+
+  auto g = clapPlugin->_ext._gui;
+  if (!g) return false;
+
+  auto res = g->can_resize(clapPlugin->_plugin);
+  return res;
+}
+
+bool StandaloneHost::gui_request_resize(uint32_t width, uint32_t height)
+{
+  if (onRequestResize)
+  {
+    return onRequestResize(width, height);
+  }
+  return false;
+}
+
 #if LIN
 
 bool StandaloneHost::register_timer(uint32_t period_ms, clap_id *timer_id)

src/detail/standalone/standalone_host.h

@@ -163,16 +163,12 @@ struct StandaloneHost : Clap::IHost
   void param_request_flush() override
   {
   }
-  bool gui_can_resize() override
-  {
-    TRACE;
-    return false;
-  }
-  bool gui_request_resize(uint32_t width, uint32_t height) override
-  {
-    TRACE;
-    return false;
-  }
+
+  bool gui_can_resize() override;
+
+  std::function<bool(uint32_t, uint32_t)> onRequestResize = [](auto, auto) { return false; };
+  bool gui_request_resize(uint32_t width, uint32_t height) override;
+
   bool gui_request_show() override
   {
     TRACE;