xenv: add minimize functionality

git-svn-id: file:///home/notaz/opt/svn/PicoDrive/platform@948 be3aeb3a-fb24-0410-a615-afba39da0efa

diff --git a/linux/xenv.c b/linux/xenv.c
index c2cd603..a932a1e 100644 (file)
--- a/linux/xenv.c
+++ b/linux/xenv.c
@@ -38,6 +38,7 @@
 
 struct xstuff {
        Display *display;
+       Window window;
        FPTR(XCreateBitmapFromData);
        FPTR(XCreatePixmapCursor);
        FPTR(XFreePixmap);
@@ -50,11 +51,17 @@ struct xstuff {
        FPTR(XMapWindow);
        FPTR(XNextEvent);
        FPTR(XCheckTypedEvent);
-       FPTR(XUnmapWindow);
+       FPTR(XWithdrawWindow);
        FPTR(XGrabKeyboard);
        FPTR(XPending);
        FPTR(XLookupKeysym);
        FPTR(XkbSetDetectableAutoRepeat);
+       FPTR(XStoreName);
+       FPTR(XIconifyWindow);
+       FPTR(XMoveResizeWindow);
+       FPTR(XInternAtom);
+       FPTR(XSetWMHints);
+       FPTR(XSync);
 };
 
 static struct xstuff g_xstuff;
@@ -74,7 +81,7 @@ static Cursor transparent_cursor(struct xstuff *xf, Display *display, Window win
        return cursor;
 }
 
-static int x11h_init(void)
+static int x11h_init(const char *window_title)
 {
        unsigned int display_width, display_height;
        Display *display;
@@ -102,11 +109,17 @@ static int x11h_init(void)
        FPTR_LINK(g_xstuff, x11lib, XMapWindow);
        FPTR_LINK(g_xstuff, x11lib, XNextEvent);
        FPTR_LINK(g_xstuff, x11lib, XCheckTypedEvent);
-       FPTR_LINK(g_xstuff, x11lib, XUnmapWindow);
+       FPTR_LINK(g_xstuff, x11lib, XWithdrawWindow);
        FPTR_LINK(g_xstuff, x11lib, XGrabKeyboard);
        FPTR_LINK(g_xstuff, x11lib, XPending);
        FPTR_LINK(g_xstuff, x11lib, XLookupKeysym);
        FPTR_LINK(g_xstuff, x11lib, XkbSetDetectableAutoRepeat);
+       FPTR_LINK(g_xstuff, x11lib, XStoreName);
+       FPTR_LINK(g_xstuff, x11lib, XIconifyWindow);
+       FPTR_LINK(g_xstuff, x11lib, XMoveResizeWindow);
+       FPTR_LINK(g_xstuff, x11lib, XInternAtom);
+       FPTR_LINK(g_xstuff, x11lib, XSetWMHints);
+       FPTR_LINK(g_xstuff, x11lib, XSync);
 
        //XInitThreads();
 
@@ -132,23 +145,26 @@ static int x11h_init(void)
        display_height = DisplayHeight(display, screen);
        printf(PFX "display is %dx%d\n", display_width, display_height);
 
-       win = g_xstuff.pXCreateSimpleWindow(display,
-                       RootWindow(display, screen),
-                       0, 0, display_width, display_height, 0,
-                       BlackPixel(display, screen),
-                       BlackPixel(display, screen));
+       g_xstuff.window = win = g_xstuff.pXCreateSimpleWindow(display,
+               RootWindow(display, screen), 0, 0, display_width, display_height,
+               0, BlackPixel(display, screen), BlackPixel(display, screen));
 
        attributes.override_redirect = True;
        attributes.cursor = transparent_cursor(&g_xstuff, display, win);
        g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes);
 
-       g_xstuff.pXSelectInput(display, win, ExposureMask | FocusChangeMask | KeyPressMask
-               | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask | PointerMotionMask);
+       g_xstuff.pXStoreName(display, win, window_title);
+       g_xstuff.pXSelectInput(display, win, ExposureMask | FocusChangeMask
+               | KeyPressMask | KeyReleaseMask | ButtonPressMask
+               | ButtonReleaseMask | PointerMotionMask | PropertyChangeMask);
        g_xstuff.pXMapWindow(display, win);
        g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime);
        g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL);
        // XSetIOErrorHandler
 
+       // we don't know when event dispatch will be called, so sync now
+       g_xstuff.pXSync(display, False);
+
        return 0;
 fail2:
        dlclose(x11lib);
@@ -208,6 +224,86 @@ static void x11h_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed),
        }
 }
 
+static void x11h_wait_vmstate(void)
+{
+       Atom wm_state = g_xstuff.pXInternAtom(g_xstuff.display, "WM_STATE", False);
+       XEvent evt;
+       int i;
+
+       usleep(20000);
+
+       for (i = 0; i < 20; i++) {
+               while (g_xstuff.pXPending(g_xstuff.display)) {
+                       g_xstuff.pXNextEvent(g_xstuff.display, &evt);
+                       // printf("w event %d\n", evt.type);
+                       if (evt.type == PropertyNotify && evt.xproperty.atom == wm_state)
+                               return;
+               }
+               usleep(200000);
+       }
+
+       fprintf(stderr, PFX "timeout waiting for wm_state change\n");
+}
+
+static int x11h_minimize(void)
+{
+       XSetWindowAttributes attributes;
+       Display *display = g_xstuff.display;
+       Window window = g_xstuff.window;
+       int screen = DefaultScreen(g_xstuff.display);
+       int display_width, display_height;
+       XWMHints wm_hints;
+       XEvent evt;
+
+       g_xstuff.pXWithdrawWindow(display, window, screen);
+
+       attributes.override_redirect = False;
+       g_xstuff.pXChangeWindowAttributes(display, window,
+               CWOverrideRedirect, &attributes);
+
+       wm_hints.flags = StateHint;
+       wm_hints.initial_state = IconicState;
+       g_xstuff.pXSetWMHints(display, window, &wm_hints);
+
+       g_xstuff.pXMapWindow(display, window);
+
+       while (g_xstuff.pXNextEvent(display, &evt) == 0)
+       {
+               // printf("m event %d\n", evt.type);
+               switch (evt.type)
+               {
+                       case FocusIn:
+                               goto out;
+                       default:
+                               break;
+               }
+       }
+
+out:
+       g_xstuff.pXWithdrawWindow(display, window, screen);
+
+       // must wait for some magic vmstate property change before setting override_redirect
+       x11h_wait_vmstate();
+
+       attributes.override_redirect = True;
+       g_xstuff.pXChangeWindowAttributes(display, window,
+               CWOverrideRedirect, &attributes);
+
+       // fixup window after resize on override_redirect loss
+       display_width = DisplayWidth(display, screen);
+       display_height = DisplayHeight(display, screen);
+       g_xstuff.pXMoveResizeWindow(display, window, 0, 0, display_width, display_height);
+
+       g_xstuff.pXMapWindow(display, window);
+       g_xstuff.pXGrabKeyboard(display, window, False, GrabModeAsync, GrabModeAsync, CurrentTime);
+       g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL);
+
+       // we don't know when event dispatch will be called, so sync now
+       g_xstuff.pXSync(display, False);
+
+       return 0;
+}
+
 static struct termios g_kbd_termios_saved;
 static int g_kbdfd = -1;
 
@@ -272,12 +368,12 @@ static void tty_end(void)
        g_kbdfd = -1;
 }
 
-int xenv_init(int *have_mouse_events)
+int xenv_init(int *have_mouse_events, const char *window_title)
 {
        int have_mouse = 0;
        int ret;
 
-       ret = x11h_init();
+       ret = x11h_init(window_title);
        if (ret == 0) {
                have_mouse = 1;
                goto out;
@@ -309,8 +405,47 @@ int xenv_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed),
        return -1;
 }
 
+/* blocking minimize until user maximizes again */
+int xenv_minimize(void)
+{
+       int ret;
+
+       if (g_xstuff.display) {
+               xenv_update(NULL, NULL, NULL, NULL);
+               ret = x11h_minimize();
+               xenv_update(NULL, NULL, NULL, NULL);
+               return ret;
+       }
+
+       return -1;
+}
+
 void xenv_finish(void)
 {
        // TODO: cleanup X?
        tty_end();
 }
+
+#if 0
+int main()
+{
+       int i, r, d;
+
+       xenv_init("just a test");
+
+       for (i = 0; i < 5; i++) {
+               while ((r = xenv_update(&d)) > 0)
+                       printf("%d %x %d\n", d, r, r);
+               sleep(1);
+
+               if (i == 1)
+                       xenv_minimize();
+               printf("ll %d\n", i);
+       }
+
+       printf("xenv_finish..\n");
+       xenv_finish();
+
+       return 0;
+}
+#endif

diff --git a/linux/xenv.h b/linux/xenv.h
index 4c5281c..cd1bc70 100644 (file)
--- a/linux/xenv.h
+++ b/linux/xenv.h
@@ -1,5 +1,5 @@
 
-int  xenv_init(int *have_mouse_events);
+int  xenv_init(int *have_mouse_events, const char *window_title);
 
 /* read events from X, calling key_cb for key, mouseb_cb for mouse button
  * and mousem_cb for mouse motion events */
@@ -8,5 +8,6 @@ int  xenv_update(int (*key_cb)(void *cb_arg, int kc, int is_pressed),
                 int (*mousem_cb)(void *cb_arg, int x, int y),
                 void *cb_arg);
 
+int  xenv_minimize(void);
 void xenv_finish(void);