From c1b10a8d7c6abf55ac078777a573d44ccc59cd54 Mon Sep 17 00:00:00 2001
From: casey <casey@GREENPOINT>
Date: Mon, 18 Jul 2016 01:34:06 -0700
Subject: [PATCH] Disable window drawing if the terminal is resized too small.

---
 src/musikbox/Main.cpp                  | 16 ++++++++++++++--
 src/musikbox/app/layout/MainLayout.cpp | 20 +++++++++++---------
 src/musikbox/cursespp/App.cpp          |  5 ++++-
 src/musikbox/cursespp/Window.cpp       | 17 ++++++++++++++++-
 src/musikbox/cursespp/Window.h         |  2 ++
 5 files changed, 47 insertions(+), 13 deletions(-)

diff --git a/src/musikbox/Main.cpp b/src/musikbox/Main.cpp
index d65ffb820..6e191d1af 100644
--- a/src/musikbox/Main.cpp
+++ b/src/musikbox/Main.cpp
@@ -35,6 +35,7 @@
 #include "stdafx.h"
 
 #include <cursespp/App.h>
+#include <cursespp/Screen.h>
 
 #include <app/layout/ConsoleLayout.h>
 #include <app/layout/LibraryLayout.h>
@@ -58,6 +59,9 @@ using namespace musik::core::audio;
 using namespace musik::box;
 using namespace cursespp;
 
+#define MIN_WIDTH 60
+#define MIN_HEIGHT 14
+
 #ifdef WIN32
 int _main(int argc, _TCHAR* argv[]);
 
@@ -79,7 +83,7 @@ int main(int argc, char* argv[])
 #endif
 
 #ifdef __PDCURSES__
-    PDC_set_resize_limits(12, 60, 60, 250);
+    PDC_set_resize_limits(MIN_HEIGHT, MIN_WIDTH, 60, 250);
     resize_term(26, 100); /* must be before app init */
 #endif
 
@@ -124,7 +128,15 @@ int main(int argc, char* argv[])
         });
 
         app.SetResizeHandler([&]() {
-            mainLayout->Layout();
+            int cx = Screen::GetWidth();
+            int cy = Screen::GetHeight();
+            if (cx <= MIN_WIDTH || cy <= MIN_HEIGHT) {
+                Window::Freeze();
+            }
+            else {
+                Window::Unfreeze();
+                mainLayout->Layout();
+            }
         });
 
         app.Run(mainLayout);
diff --git a/src/musikbox/app/layout/MainLayout.cpp b/src/musikbox/app/layout/MainLayout.cpp
index 1bf0e7c35..20c79dc53 100755
--- a/src/musikbox/app/layout/MainLayout.cpp
+++ b/src/musikbox/app/layout/MainLayout.cpp
@@ -113,17 +113,19 @@ void MainLayout::SetMainLayout(std::shared_ptr<cursespp::LayoutBase> layout) {
         }
 
         this->layout = layout;
-        this->topLevelLayout = dynamic_cast<ITopLevelLayout*>(layout.get());
-
         this->shortcuts->RemoveAll();
-        if (this->topLevelLayout) {
-            this->topLevelLayout->SetShortcutsWindow(this->shortcuts.get());
-        }
 
-        this->AddWindow(layout);
-        this->layout->SetFocusOrder(0);
-        this->Show();
-        this->Layout();
+        if (this->layout) {
+            this->topLevelLayout = dynamic_cast<ITopLevelLayout*>(layout.get());
+            if (this->topLevelLayout) {
+                this->topLevelLayout->SetShortcutsWindow(this->shortcuts.get());
+            }
+
+            this->AddWindow(layout);
+            this->layout->SetFocusOrder(0);
+            this->Show();
+            this->Layout();
+        }
     }
 }
 
diff --git a/src/musikbox/cursespp/App.cpp b/src/musikbox/cursespp/App.cpp
index 8fc8f23d1..914164f32 100755
--- a/src/musikbox/cursespp/App.cpp
+++ b/src/musikbox/cursespp/App.cpp
@@ -173,7 +173,10 @@ void App::Run(ILayoutPtr layout) {
                 resizeAt = App::Now() + REDRAW_DEBOUNCE_MS;
             }
             /* order: focused input, global key handler, then layout. */
-            else if (!this->state.input || !this->state.input->Write(kn)) {
+            else if (!this->state.input ||
+                !this->state.focused->IsVisible() ||
+                !this->state.input->Write(kn))
+            {
                 if (!keyHandler || !keyHandler(kn)) {
                     if (!this->state.keyHandler || !this->state.keyHandler->KeyPress(kn)) {
                         this->state.layout->KeyPress(kn);
diff --git a/src/musikbox/cursespp/Window.cpp b/src/musikbox/cursespp/Window.cpp
index f23354ad1..1031f9d50 100755
--- a/src/musikbox/cursespp/Window.cpp
+++ b/src/musikbox/cursespp/Window.cpp
@@ -44,9 +44,10 @@ using namespace cursespp;
 
 static int NEXT_ID = 0;
 static bool drawPending = false;
+static bool freeze = false;
 
 void Window::WriteToScreen(IInput* input) {
-    if (drawPending) {
+    if (drawPending && !freeze) {
         drawPending = false;
 
         update_panels();
@@ -72,6 +73,20 @@ void Window::Invalidate() {
     drawPending = true;
 }
 
+void Window::Freeze() {
+    if (!freeze) {
+        freeze = true;
+        Window::Invalidate();
+    }
+}
+
+void Window::Unfreeze() {
+    if (freeze) {
+        freeze = false;
+        Window::Invalidate();
+    }
+}
+
 Window::Window(IWindow *parent) {
     this->frame = this->content = 0;
     this->framePanel = this->contentPanel = 0;
diff --git a/src/musikbox/cursespp/Window.h b/src/musikbox/cursespp/Window.h
index f74c9047b..35f3b1e82 100755
--- a/src/musikbox/cursespp/Window.h
+++ b/src/musikbox/cursespp/Window.h
@@ -88,6 +88,8 @@ namespace cursespp {
 
             static void WriteToScreen(IInput* input);
             static void Invalidate();
+            static void Freeze();
+            static void Unfreeze();
 
         protected:
             IWindow* GetParent() const;