Commit 0969b893 authored by Geoff Voelker's avatar Geoff Voelker

(FRAME_OBSCURED_P): New macro.

(FRAME_SAMPLE_VISIBILITY): Distinguish between invisible and obscured.
parent bb1ff1f4
......@@ -214,6 +214,14 @@ struct frame
frame becomes visible again, it must be marked as garbaged. The
FRAME_SAMPLE_VISIBILITY macro takes care of this.
On Windows NT/9X, to avoid wasting effort updating visible frames
that are actually completely obscured by other windows on the
display, we bend the meaning of visible slightly: if greater than
1, then the frame is obscured - we still consider it to be
"visible" as seen from lisp, but we don't bother updating it. We
must take care to garbage the frame when it ceaces to be obscured
though. Note that these semantics are only used on NT/9X.
iconified is nonzero if the frame is currently iconified.
Asynchronous input handlers should NOT change these directly;
......@@ -353,6 +361,7 @@ typedef struct frame *FRAME_PTR;
#define FRAME_CURSOR_X(f) (f)->cursor_x
#define FRAME_CURSOR_Y(f) (f)->cursor_y
#define FRAME_VISIBLE_P(f) ((f)->visible != 0)
#define FRAME_OBSCURED_P(f) ((f)->visible > 1)
#define FRAME_SET_VISIBLE(f,p) \
((f)->async_visible = (p), FRAME_SAMPLE_VISIBILITY (f))
#define SET_FRAME_GARBAGED(f) (frame_garbaged = 1, f->garbaged = 1)
......@@ -429,7 +438,8 @@ typedef struct frame *FRAME_PTR;
it must be marked as garbaged, since redisplay hasn't been keeping
up its contents. */
(((f)->async_visible && ! (f)->visible) ? SET_FRAME_GARBAGED (f) : 0, \
(((f)->async_visible && (f)->visible != (f)->async_visible) ? \
(f)->visible = (f)->async_visible, \
(f)->iconified = (f)->async_iconified)
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