M barito.c → barito.c

@@ -17,6 +17,7 @@ static Window root;
 static Colormap colormap;
 static int depth;
 static int screen;
+static int xfd;
 
 static unsigned long alloc_color(const char *s)
 {
@@ -36,9 +37,9 @@ swa.background_pixel = alloc_color(bg);
 	swa.override_redirect = 1;
 	swa.event_mask = ExposureMask;
 	win = XCreateWindow(dpy, root, x, y, w, h, 0, CopyFromParent,
-			    CopyFromParent, CopyFromParent,
-			    CWBackPixel | CWOverrideRedirect | CWEventMask,
-			    &swa);
+					CopyFromParent, CopyFromParent,
+					CWBackPixel | CWOverrideRedirect | CWEventMask,
+					&swa);
 
 	return win;
 }
@@ -94,7 +95,7 @@ }
 
 /* draw text on pixmap */
 static void draw_text(Drawable pix, XftFont *font, XftColor *color,
-		      const char *text)
+					const char *text)
 {
 	XGlyphInfo ext;
 	XftDraw *draw;
@@ -114,34 +115,6 @@
 	XftDrawDestroy(draw);
 }
 
-/* enter the event loop */
-// static void run(GC gc, Pixmap pix)
-// {
-// 	XEvent ev;
-//
-// 	while (XNextEvent(dpy, &ev) == 0) {
-// 		switch (e.type) {
-// 		case Expose:
-// 			printf("%d %d", e.xexpose.x, e.xexpose.y);
-// 			XCopyArea(dpy, pix, e.xexpose.window, gc, e.xexpose.x,
-// 				  e.xexpose.y, e.xexpose.width,
-// 				  e.xexpose.height, e.xexpose.x,
-// 				  e.xexpose.y);
-// 			break;
-// 		}
-// 	}
-
-// }
-
-void draw_bar(Window win, GC gc, Pixmap pix, XftFont *font, XftColor *color,
-	      const char *text, XExposeEvent xexpose)
-{
-	draw_text(pix, font, color, text);
-	XMapWindow(dpy, win);
-	XCopyArea(dpy, pix, win, gc, xexpose.x, xexpose.y, xexpose.width,
-		  xexpose.height, xexpose.x, xexpose.y);
-}
-
 int main(int argc, char *argv[])
 {
 	XftColor color;
@@ -156,9 +129,6 @@ char buffer[BUFSIZ];
 	int reading = 1;
 	int flags; /* stdin flags */
 
-	struct pollfd pfd;
-	pfd.fd = STDIN_FILENO;
-	pfd.events = POLLIN;
 
 	/* make stdin non-blocking */
 	if ((flags = fcntl(STDIN_FILENO, F_GETFL)) == -1)
@@ -179,35 +149,52 @@ gc = XCreateGC(dpy, root, 0, NULL);
 	pix = create_pixmap(gc, WIDTH, HEIGHT);
 	font = XftFontOpenName(dpy, screen, fontname);
 	xft_alloc_color(fg, &color);
+	xfd = XConnectionNumber(dpy);
 
 	init_atoms(win);
 
-	/* wait for expose event to draw our bar */
-	while (1) {
-		XEvent e;
-		XNextEvent(dpy, &e);
-		if (e.type == Expose) {
-			xexpose = e.xexpose;
-			break;
-		}
-	}
+	struct pollfd pfd[2];
+	pfd[0].fd = STDIN_FILENO;
+	pfd[1].fd = xfd;
+	pfd[0].events = pfd[1].events = POLLIN;
+
+	int redraw = 0;
 
+	XMapWindow(dpy, win);
 	while (reading) {
-		if (pfd.revents & POLLHUP) {
-			pfd.fd = -1;
+		if (pfd[0].revents & POLLHUP) {
+			pfd[0].fd = -1;
 			reading = 0;
 		}
-		if (poll(&pfd, 1, -1)) {
-			if (pfd.revents & POLLIN) {
+		if (poll(pfd, 2, -1)) {
+			if (pfd[0].revents & POLLIN) {
 				if (fgets(buffer, sizeof buffer, stdin) == NULL)
 					break;
+				
+				if (redraw) {
+					XFreePixmap(dpy, pix);
+					pix = create_pixmap(gc, WIDTH, HEIGHT);
+				}
 
-				draw_bar(win, gc, pix, font, &color, buffer,
-					 xexpose);
+				draw_text(pix, font, &color, buffer);
+				XClearArea(dpy, win, 0, 0, WIDTH, HEIGHT, 1);
+				XFlush(dpy);
+			}
+			if (pfd[1].revents & POLLIN) {
+				XEvent ev;
+				while (XPending(dpy) && !XNextEvent(dpy, &ev)) {
+					if (ev.type == Expose) {
+						xexpose = ev.xexpose;
+						XCopyArea(dpy, pix, win, gc, xexpose.x, xexpose.y, xexpose.width,
+						xexpose.height, xexpose.x, xexpose.y);
+						redraw = 1;
+						break;
+					}
+				}
 			}
 		}
+		XFlush(dpy);
 	}
-
 	/* housekeeping */
 	XUnmapWindow(dpy, win);
 	XDestroyWindow(dpy, win);