ui/vc: drop have_text

If there are no "text" listener, the callback will simply be ignored.
The rest of text handling can be done cheaply.

This allows to remove some dependency on DisplayState from VC
implementation.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230830093843.3531473-6-marcandre.lureau@redhat.com>

ui/console.c

@@ -133,7 +133,6 @@ struct DisplayState {
     uint64_t update_interval;
     bool refreshing;
     bool have_gfx;
-    bool have_text;
 
     QLIST_HEAD(, DisplayChangeListener) listeners;
 };
@@ -185,7 +184,6 @@ static void gui_setup_refresh(DisplayState *ds)
     DisplayChangeListener *dcl;
     bool need_timer = false;
     bool have_gfx = false;
-    bool have_text = false;
 
     QLIST_FOREACH(dcl, &ds->listeners, next) {
         if (dcl->ops->dpy_refresh != NULL) {
@@ -194,9 +192,6 @@ static void gui_setup_refresh(DisplayState *ds)
         if (dcl->ops->dpy_gfx_update != NULL) {
             have_gfx = true;
         }
-        if (dcl->ops->dpy_text_update != NULL) {
-            have_text = true;
-        }
     }
 
     if (need_timer && ds->gui_timer == NULL) {
@@ -209,7 +204,6 @@ static void gui_setup_refresh(DisplayState *ds)
     }
 
     ds->have_gfx = have_gfx;
-    ds->have_text = have_text;
 }
 
 void graphic_hw_update_done(QemuConsole *con)
@@ -456,9 +450,7 @@ static void update_xy(QemuConsole *s, int x, int y)
     TextCell *c;
     int y1, y2;
 
-    if (s->ds->have_text) {
-        text_update_xy(s, x, y);
-    }
+    text_update_xy(s, x, y);
 
     y1 = (s->y_base + y) % s->total_height;
     y2 = y1 - s->y_displayed;
@@ -482,9 +474,7 @@ static void console_show_cursor(QemuConsole *s, int show)
     int y, y1;
     int x = s->x;
 
-    if (s->ds->have_text) {
-        s->cursor_invalidate = 1;
-    }
+    s->cursor_invalidate = 1;
 
     if (x >= s->width) {
         x = s->width - 1;
@@ -513,13 +503,11 @@ static void console_refresh(QemuConsole *s)
     TextCell *c;
     int x, y, y1;
 
-    if (s->ds->have_text) {
-        s->text_x[0] = 0;
-        s->text_y[0] = 0;
-        s->text_x[1] = s->width - 1;
-        s->text_y[1] = s->height - 1;
-        s->cursor_invalidate = 1;
-    }
+    s->text_x[0] = 0;
+    s->text_y[0] = 0;
+    s->text_x[1] = s->width - 1;
+    s->text_y[1] = s->height - 1;
+    s->cursor_invalidate = 1;
 
     vga_fill_rect(s, 0, 0, surface_width(surface), surface_height(surface),
                   color_table_rgb[0][QEMU_COLOR_BLACK]);
@@ -594,12 +582,10 @@ static void console_put_lf(QemuConsole *s)
             c++;
         }
         if (s->y_displayed == s->y_base) {
-            if (s->ds->have_text) {
-                s->text_x[0] = 0;
-                s->text_y[0] = 0;
-                s->text_x[1] = s->width - 1;
-                s->text_y[1] = s->height - 1;
-            }
+            s->text_x[0] = 0;
+            s->text_y[0] = 0;
+            s->text_x[1] = s->width - 1;
+            s->text_y[1] = s->height - 1;
 
             vga_bitblt(s, 0, FONT_HEIGHT, 0, 0,
                        s->width * FONT_WIDTH,
@@ -1069,9 +1055,7 @@ void console_select(unsigned int index)
                 displaychangelistener_display_console(dcl, s, NULL);
             }
         }
-        if (ds->have_text) {
-            dpy_text_resize(s, s->width, s->height);
-        }
+        dpy_text_resize(s, s->width, s->height);
         text_console_update_cursor(NULL);
     }
 }
@@ -1239,7 +1223,7 @@ static void text_console_invalidate(void *opaque)
 {
     QemuConsole *s = (QemuConsole *) opaque;
 
-    if (s->ds->have_text && s->console_type == TEXT_CONSOLE) {
+    if (s->console_type == TEXT_CONSOLE) {
         text_console_resize(s);
     }
     console_refresh(s);