[Qemu-devel] [PATCH 20/23] console: allow pinning displaychangelisteners to consoles

[Gerd Hoffmann <kraxel@redhat.com>]

DisplayChangeListener gets a new QemuConsole field, which can be set to
non-NULL before registering.  This will pin the QemuConsole, so that
particular DisplayChangeListener will not follow console switches.

spice+gtk (which don't support text console input anyway) are switched
over to be pinned to console 0, which usually is the graphical display.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/qxl.c                   |    2 +-
 include/ui/console.h       |    2 +
 include/ui/spice-display.h |    1 -
 ui/console.c               |  103 +++++++++++++++++++++++++++++++-------------
 ui/gtk.c                   |    3 +-
 ui/spice-display.c         |   11 ++---
 6 files changed, 84 insertions(+), 38 deletions(-)

diff --git a/hw/qxl.c b/hw/qxl.c
index 36f18fd..320c017 100644
--- a/hw/qxl.c
+++ b/hw/qxl.c
@@ -2061,7 +2061,6 @@ static int qxl_init_primary(PCIDevice *dev)
     portio_list_add(qxl_vga_port_list, pci_address_space_io(dev), 0x3b0);
 
     vga->con = graphic_console_init(&qxl_ops, qxl);
-    qxl->ssd.con = vga->con,
     qemu_spice_display_init_common(&qxl->ssd);
 
     rc = qxl_init_common(qxl);
@@ -2070,6 +2069,7 @@ static int qxl_init_primary(PCIDevice *dev)
     }
 
     qxl->ssd.dcl.ops = &display_listener_ops;
+    qxl->ssd.dcl.con = vga->con;
     ds = qemu_console_displaystate(vga->con);
     register_displaychangelistener(ds, &qxl->ssd.dcl);
     return rc;
diff --git a/include/ui/console.h b/include/ui/console.h
index bcd0139..e591d74 100644
--- a/include/ui/console.h
+++ b/include/ui/console.h
@@ -178,6 +178,7 @@ struct DisplayChangeListener {
     uint64_t update_interval;
     const DisplayChangeListenerOps *ops;
     DisplayState *ds;
+    QemuConsole *con;
 
     QLIST_ENTRY(DisplayChangeListener) next;
 };
@@ -282,6 +283,7 @@ void graphic_hw_update(QemuConsole *con);
 void graphic_hw_invalidate(QemuConsole *con);
 void graphic_hw_text_update(QemuConsole *con, console_ch_t *chardata);
 
+QemuConsole *qemu_console_lookup_by_index(unsigned int index);
 bool qemu_console_is_visible(QemuConsole *con);
 bool qemu_console_is_graphic(QemuConsole *con);
 bool qemu_console_is_fixedsize(QemuConsole *con);
diff --git a/include/ui/spice-display.h b/include/ui/spice-display.h
index 7a20fc4..a46bc80 100644
--- a/include/ui/spice-display.h
+++ b/include/ui/spice-display.h
@@ -71,7 +71,6 @@ typedef struct SimpleSpiceDisplay SimpleSpiceDisplay;
 typedef struct SimpleSpiceUpdate SimpleSpiceUpdate;
 
 struct SimpleSpiceDisplay {
-    QemuConsole *con;
     DisplaySurface *ds;
     DisplayChangeListener dcl;
     void *buf;
diff --git a/ui/console.c b/ui/console.c
index 0f2fea5..d78552e 100644
--- a/ui/console.c
+++ b/ui/console.c
@@ -117,6 +117,7 @@ struct QemuConsole {
     console_type_t console_type;
     DisplayState *ds;
     DisplaySurface *surface;
+    int dcls;
 
     /* Graphic console state.  */
     const GraphicHwOps *hw_ops;
@@ -172,8 +173,6 @@ static QemuConsole *consoles[MAX_CONSOLES];
 static int nb_consoles = 0;
 
 static void text_console_do_init(CharDriverState *chr, DisplayState *ds);
-static void dpy_gfx_switch_surface(DisplayState *ds,
-                                   DisplaySurface *surface);
 static void dpy_refresh(DisplayState *s);
 
 static void gui_update(void *opaque)
@@ -309,7 +308,7 @@ write_err:
 
 void qmp_screendump(const char *filename, Error **errp)
 {
-    QemuConsole *con = consoles[0];
+    QemuConsole *con = qemu_console_lookup_by_index(0);
     DisplaySurface *surface;
 
     graphic_hw_update(con);
@@ -1016,13 +1015,14 @@ static void console_putchar(QemuConsole *s, int ch)
 
 void console_select(unsigned int index)
 {
+    DisplayChangeListener *dcl;
     QemuConsole *s;
 
     if (index >= MAX_CONSOLES)
         return;
 
     trace_console_select(index);
-    s = consoles[index];
+    s = qemu_console_lookup_by_index(index);
     if (s) {
         DisplayState *ds = s->ds;
 
@@ -1031,7 +1031,14 @@ void console_select(unsigned int index)
         }
         active_console = s;
         if (ds->have_gfx) {
-            dpy_gfx_switch_surface(ds, s->surface);
+            QLIST_FOREACH(dcl, &ds->listeners, next) {
+                if (dcl->con != NULL) {
+                    continue;
+                }
+                if (dcl->ops->dpy_gfx_switch) {
+                    dcl->ops->dpy_gfx_switch(dcl, s->surface);
+                }
+            }
             dpy_gfx_update(s, 0, 0, surface_width(s->surface),
                            surface_height(s->surface));
         }
@@ -1286,12 +1293,20 @@ void qemu_free_displaysurface(DisplaySurface *surface)
 void register_displaychangelistener(DisplayState *ds,
                                     DisplayChangeListener *dcl)
 {
+    QemuConsole *con;
+
     trace_displaychangelistener_register(dcl, dcl->ops->dpy_name);
     dcl->ds = ds;
     QLIST_INSERT_HEAD(&ds->listeners, dcl, next);
     gui_setup_refresh(ds);
-    if (dcl->ops->dpy_gfx_switch && active_console) {
-        dcl->ops->dpy_gfx_switch(dcl, active_console->surface);
+    if (dcl->con) {
+        dcl->con->dcls++;
+        con = dcl->con;
+    } else {
+        con = active_console;
+    }
+    if (dcl->ops->dpy_gfx_switch && con) {
+        dcl->ops->dpy_gfx_switch(dcl, con->surface);
     }
 }
 
@@ -1310,6 +1325,9 @@ void unregister_displaychangelistener(DisplayChangeListener *dcl)
 {
     DisplayState *ds = dcl->ds;
     trace_displaychangelistener_unregister(dcl, dcl->ops->dpy_name);
+    if (dcl->con) {
+        dcl->con->dcls--;
+    }
     QLIST_REMOVE(dcl, next);
     gui_setup_refresh(ds);
 }
@@ -1317,7 +1335,7 @@ void unregister_displaychangelistener(DisplayChangeListener *dcl)
 void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h)
 {
     DisplayState *s = con->ds;
-    struct DisplayChangeListener *dcl;
+    DisplayChangeListener *dcl;
     int width = surface_width(con->surface);
     int height = surface_height(con->surface);
 
@@ -1332,40 +1350,38 @@ void dpy_gfx_update(QemuConsole *con, int x, int y, int w, int h)
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (con != (dcl->con ? dcl->con : active_console)) {
+            continue;
+        }
         if (dcl->ops->dpy_gfx_update) {
             dcl->ops->dpy_gfx_update(dcl, x, y, w, h);
         }
     }
 }
 
-static void dpy_gfx_switch_surface(DisplayState *ds,
-                                   DisplaySurface *surface)
-{
-    struct DisplayChangeListener *dcl;
-
-    QLIST_FOREACH(dcl, &ds->listeners, next) {
-        if (dcl->ops->dpy_gfx_switch) {
-            dcl->ops->dpy_gfx_switch(dcl, surface);
-        }
-    }
-}
-
 void dpy_gfx_replace_surface(QemuConsole *con,
                              DisplaySurface *surface)
 {
     DisplayState *s = con->ds;
     DisplaySurface *old_surface = con->surface;
+    DisplayChangeListener *dcl;
 
     con->surface = surface;
-    if (qemu_console_is_visible(con)) {
-        dpy_gfx_switch_surface(s, surface);
+    QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (con != (dcl->con ? dcl->con : active_console)) {
+            continue;
+        }
+        if (dcl->ops->dpy_gfx_switch) {
+            dcl->ops->dpy_gfx_switch(dcl, surface);
+        }
     }
     qemu_free_displaysurface(old_surface);
 }
 
 void dpy_refresh(DisplayState *s)
 {
-    struct DisplayChangeListener *dcl;
+    DisplayChangeListener *dcl;
+
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (dcl->ops->dpy_refresh) {
             dcl->ops->dpy_refresh(dcl);
@@ -1377,12 +1393,15 @@ void dpy_gfx_copy(QemuConsole *con, int src_x, int src_y,
                   int dst_x, int dst_y, int w, int h)
 {
     DisplayState *s = con->ds;
-    struct DisplayChangeListener *dcl;
+    DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (con != (dcl->con ? dcl->con : active_console)) {
+            continue;
+        }
         if (dcl->ops->dpy_gfx_copy) {
             dcl->ops->dpy_gfx_copy(dcl, src_x, src_y, dst_x, dst_y, w, h);
         } else { /* TODO */
@@ -1394,12 +1413,15 @@ void dpy_gfx_copy(QemuConsole *con, int src_x, int src_y,
 void dpy_text_cursor(QemuConsole *con, int x, int y)
 {
     DisplayState *s = con->ds;
-    struct DisplayChangeListener *dcl;
+    DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (con != (dcl->con ? dcl->con : active_console)) {
+            continue;
+        }
         if (dcl->ops->dpy_text_cursor) {
             dcl->ops->dpy_text_cursor(dcl, x, y);
         }
@@ -1409,12 +1431,15 @@ void dpy_text_cursor(QemuConsole *con, int x, int y)
 void dpy_text_update(QemuConsole *con, int x, int y, int w, int h)
 {
     DisplayState *s = con->ds;
-    struct DisplayChangeListener *dcl;
+    DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (con != (dcl->con ? dcl->con : active_console)) {
+            continue;
+        }
         if (dcl->ops->dpy_text_update) {
             dcl->ops->dpy_text_update(dcl, x, y, w, h);
         }
@@ -1430,6 +1455,9 @@ void dpy_text_resize(QemuConsole *con, int w, int h)
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (con != (dcl->con ? dcl->con : active_console)) {
+            continue;
+        }
         if (dcl->ops->dpy_text_resize) {
             dcl->ops->dpy_text_resize(dcl, w, h);
         }
@@ -1439,12 +1467,15 @@ void dpy_text_resize(QemuConsole *con, int w, int h)
 void dpy_mouse_set(QemuConsole *con, int x, int y, int on)
 {
     DisplayState *s = con->ds;
-    struct DisplayChangeListener *dcl;
+    DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (con != (dcl->con ? dcl->con : active_console)) {
+            continue;
+        }
         if (dcl->ops->dpy_mouse_set) {
             dcl->ops->dpy_mouse_set(dcl, x, y, on);
         }
@@ -1454,12 +1485,15 @@ void dpy_mouse_set(QemuConsole *con, int x, int y, int on)
 void dpy_cursor_define(QemuConsole *con, QEMUCursor *cursor)
 {
     DisplayState *s = con->ds;
-    struct DisplayChangeListener *dcl;
+    DisplayChangeListener *dcl;
 
     if (!qemu_console_is_visible(con)) {
         return;
     }
     QLIST_FOREACH(dcl, &s->listeners, next) {
+        if (con != (dcl->con ? dcl->con : active_console)) {
+            continue;
+        }
         if (dcl->ops->dpy_cursor_define) {
             dcl->ops->dpy_cursor_define(dcl, cursor);
         }
@@ -1469,7 +1503,8 @@ void dpy_cursor_define(QemuConsole *con, QEMUCursor *cursor)
 bool dpy_cursor_define_supported(QemuConsole *con)
 {
     DisplayState *s = con->ds;
-    struct DisplayChangeListener *dcl;
+    DisplayChangeListener *dcl;
+
     QLIST_FOREACH(dcl, &s->listeners, next) {
         if (dcl->ops->dpy_cursor_define) {
             return true;
@@ -1530,9 +1565,17 @@ QemuConsole *graphic_console_init(const GraphicHwOps *hw_ops,
     return s;
 }
 
+QemuConsole *qemu_console_lookup_by_index(unsigned int index)
+{
+    if (index >= MAX_CONSOLES) {
+        return NULL;
+    }
+    return consoles[index];
+}
+
 bool qemu_console_is_visible(QemuConsole *con)
 {
-    return con == active_console;
+    return (con == active_console) || (con->dcls > 0);
 }
 
 bool qemu_console_is_graphic(QemuConsole *con)
diff --git a/ui/gtk.c b/ui/gtk.c
index bccab90..7599ff4 100644
--- a/ui/gtk.c
+++ b/ui/gtk.c
@@ -300,7 +300,7 @@ static void gd_update(DisplayChangeListener *dcl,
 
 static void gd_refresh(DisplayChangeListener *dcl)
 {
-    graphic_hw_update(NULL);
+    graphic_hw_update(dcl->con);
 }
 
 static void gd_switch(DisplayChangeListener *dcl,
@@ -1318,6 +1318,7 @@ void gtk_display_init(DisplayState *ds)
     gtk_init(NULL, NULL);
 
     s->dcl.ops = &dcl_ops;
+    s->dcl.con = qemu_console_lookup_by_index(0);
 
     s->window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
 #if GTK_CHECK_VERSION(3, 2, 0)
diff --git a/ui/spice-display.c b/ui/spice-display.c
index 2c01674..53c19be 100644
--- a/ui/spice-display.c
+++ b/ui/spice-display.c
@@ -398,14 +398,14 @@ void qemu_spice_display_switch(SimpleSpiceDisplay *ssd,
 void qemu_spice_cursor_refresh_unlocked(SimpleSpiceDisplay *ssd)
 {
     if (ssd->cursor) {
-        assert(ssd->con);
-        dpy_cursor_define(ssd->con, ssd->cursor);
+        assert(ssd->dcl.con);
+        dpy_cursor_define(ssd->dcl.con, ssd->cursor);
         cursor_put(ssd->cursor);
         ssd->cursor = NULL;
     }
     if (ssd->mouse_x != -1 && ssd->mouse_y != -1) {
-        assert(ssd->con);
-        dpy_mouse_set(ssd->con, ssd->mouse_x, ssd->mouse_y, 1);
+        assert(ssd->dcl.con);
+        dpy_mouse_set(ssd->dcl.con, ssd->mouse_x, ssd->mouse_y, 1);
         ssd->mouse_x = -1;
         ssd->mouse_y = -1;
     }
@@ -414,7 +414,7 @@ void qemu_spice_cursor_refresh_unlocked(SimpleSpiceDisplay *ssd)
 void qemu_spice_display_refresh(SimpleSpiceDisplay *ssd)
 {
     dprint(3, "%s:\n", __func__);
-    graphic_hw_update(ssd->con);
+    graphic_hw_update(ssd->dcl.con);
 
     qemu_mutex_lock(&ssd->lock);
     if (QTAILQ_EMPTY(&ssd->updates) && ssd->ds) {
@@ -624,6 +624,7 @@ void qemu_spice_display_init(DisplayState *ds)
     qemu_spice_create_host_memslot(ssd);
 
     ssd->dcl.ops = &display_listener_ops;
+    ssd->dcl.con = qemu_console_lookup_by_index(0);
     register_displaychangelistener(ds, &ssd->dcl);
 
     qemu_spice_create_host_primary(ssd);
-- 
1.7.9.7