From 9444c11e99f3e480e006e6f37acf43f97932bbb3 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Fri, 9 Aug 2013 23:13:52 -0700
Subject: [PATCH] Fixed bug 2007 - SDL_SetWindowMinimumSize() not implemented
 on X11 (thanks Rainer!)

---
 src/video/x11/SDL_x11video.c  |  2 ++
 src/video/x11/SDL_x11window.c | 59 +++++++++++++++++++++++++++++++++++
 src/video/x11/SDL_x11window.h |  2 ++
 3 files changed, 63 insertions(+)

diff --git a/src/video/x11/SDL_x11video.c b/src/video/x11/SDL_x11video.c
index d12f87a7b..86597ecf2 100644
--- a/src/video/x11/SDL_x11video.c
+++ b/src/video/x11/SDL_x11video.c
@@ -362,6 +362,8 @@ X11_CreateDevice(int devindex)
     device->SetWindowIcon = X11_SetWindowIcon;
     device->SetWindowPosition = X11_SetWindowPosition;
     device->SetWindowSize = X11_SetWindowSize;
+    device->SetWindowMinimumSize = X11_SetWindowMinimumSize;
+    device->SetWindowMaximumSize = X11_SetWindowMaximumSize;
     device->ShowWindow = X11_ShowWindow;
     device->HideWindow = X11_HideWindow;
     device->RaiseWindow = X11_RaiseWindow;
diff --git a/src/video/x11/SDL_x11window.c b/src/video/x11/SDL_x11window.c
index 078ca3014..e101bec0c 100644
--- a/src/video/x11/SDL_x11window.c
+++ b/src/video/x11/SDL_x11window.c
@@ -741,6 +741,64 @@ X11_SetWindowPosition(_THIS, SDL_Window * window)
     XFlush(display);
 }
 
+void
+X11_SetWindowMinimumSize(_THIS, SDL_Window * window)
+{
+    SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
+    Display *display = data->videodata->display;
+
+    if (window->flags & SDL_WINDOW_RESIZABLE) {
+         XSizeHints *sizehints = XAllocSizeHints();
+         long userhints;
+
+         XGetWMNormalHints(display, data->xwindow, sizehints, &userhints);
+
+         sizehints->min_width = window->min_w;
+         sizehints->min_height = window->min_h;
+         sizehints->flags |= PMinSize;
+
+         XSetWMNormalHints(display, data->xwindow, sizehints);
+
+         XFree(sizehints);
+
+        /* See comment in X11_SetWindowSize. */
+        XResizeWindow(display, data->xwindow, window->w, window->h);
+        XMoveWindow(display, data->xwindow, window->x, window->y);
+        XRaiseWindow(display, data->xwindow);
+    }
+
+    XFlush(display);
+}
+
+void
+X11_SetWindowMaximumSize(_THIS, SDL_Window * window)
+{
+    SDL_WindowData *data = (SDL_WindowData *) window->driverdata;
+    Display *display = data->videodata->display;
+
+    if (window->flags & SDL_WINDOW_RESIZABLE) {
+         XSizeHints *sizehints = XAllocSizeHints();
+         long userhints;
+
+         XGetWMNormalHints(display, data->xwindow, sizehints, &userhints);
+
+         sizehints->max_width = window->max_w;
+         sizehints->max_height = window->max_h;
+         sizehints->flags |= PMaxSize;
+
+         XSetWMNormalHints(display, data->xwindow, sizehints);
+
+         XFree(sizehints);
+
+        /* See comment in X11_SetWindowSize. */
+        XResizeWindow(display, data->xwindow, window->w, window->h);
+        XMoveWindow(display, data->xwindow, window->x, window->y);
+        XRaiseWindow(display, data->xwindow);
+    }
+
+    XFlush(display);
+}
+
 void
 X11_SetWindowSize(_THIS, SDL_Window * window)
 {
@@ -760,6 +818,7 @@ X11_SetWindowSize(_THIS, SDL_Window * window)
 
          sizehints->min_width = sizehints->max_width = window->w;
          sizehints->min_height = sizehints->max_height = window->h;
+         sizehints->flags |= PMinSize | PMaxSize;
 
          XSetWMNormalHints(display, data->xwindow, sizehints);
 
diff --git a/src/video/x11/SDL_x11window.h b/src/video/x11/SDL_x11window.h
index b9cb750b6..f53fd8aa2 100644
--- a/src/video/x11/SDL_x11window.h
+++ b/src/video/x11/SDL_x11window.h
@@ -70,6 +70,8 @@ extern char *X11_GetWindowTitle(_THIS, Window xwindow);
 extern void X11_SetWindowTitle(_THIS, SDL_Window * window);
 extern void X11_SetWindowIcon(_THIS, SDL_Window * window, SDL_Surface * icon);
 extern void X11_SetWindowPosition(_THIS, SDL_Window * window);
+extern void X11_SetWindowMinimumSize(_THIS, SDL_Window * window);
+extern void X11_SetWindowMaximumSize(_THIS, SDL_Window * window);
 extern void X11_SetWindowSize(_THIS, SDL_Window * window);
 extern void X11_ShowWindow(_THIS, SDL_Window * window);
 extern void X11_HideWindow(_THIS, SDL_Window * window);