Re: [Qemu-devel] [PATCH 4/8] gtk: add virtual console support (v2)

[Kevin Wolf <kwolf@redhat.com>]

Am 27.02.2012 00:46, schrieb Anthony Liguori:
> This enables VteTerminal to be used to render the text consoles.  VteTerminal is
> the same widget used by gnome-terminal which means it's VT100 emulation is as
> good as they come.
> 
> It's also screen reader accessible, supports copy/paste, proper scrolling and
> most of the other features you would expect from a terminal widget.
> 
> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
> ---
> v1 -> v2
>  - make sure to activate the menu item when switching tabs
>  - fix sizing of non-0 pages
> ---
>  console.c |    4 +-
>  console.h |    4 +-
>  ui/gtk.c  |  160 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 164 insertions(+), 4 deletions(-)
> 
> diff --git a/console.c b/console.c
> index 6434ed0..c12f02a 100644
> --- a/console.c
> +++ b/console.c
> @@ -1551,9 +1551,9 @@ static CharDriverState *text_console_init(QemuOpts *opts)
>  
>  static VcHandler *vc_handler = text_console_init;
>  
> -int vc_init(QemuOpts *opts, CharDriverState **_chr)
> +CharDriverState *vc_init(QemuOpts *opts)
>  {
> -    return vc_handler(opts, _chr);
> +    return vc_handler(opts);
>  }
>  
>  void register_vc_handler(VcHandler *handler)
> diff --git a/console.h b/console.h
> index 9b4b390..27d7929 100644
> --- a/console.h
> +++ b/console.h
> @@ -363,9 +363,9 @@ void qemu_console_resize(DisplayState *ds, int width, int height);
>  void qemu_console_copy(DisplayState *ds, int src_x, int src_y,
>                         int dst_x, int dst_y, int w, int h);
>  
> -typedef int (VcHandler)(QemuOpts *, CharDriverState **);
> +typedef CharDriverState *(VcHandler)(QemuOpts *);
>  
> -int vc_init(QemuOpts *opts, CharDriverState **_chr);
> +CharDriverState *vc_init(QemuOpts *opts);
>  void register_vc_handler(VcHandler *handler);
>  
>  /* sdl.c */
> diff --git a/ui/gtk.c b/ui/gtk.c
> index 591a987..0579a55 100644
> --- a/ui/gtk.c
> +++ b/ui/gtk.c
> @@ -56,6 +56,8 @@
>  #define dprintf(fmt, ...) do { } while (0)
>  #endif
>  
> +#define MAX_VCS 10
> +
>  typedef struct VirtualConsole
>  {
>      GtkWidget *menu_item;
> @@ -79,6 +81,9 @@ typedef struct GtkDisplayState
>      GtkWidget *view_menu;
>      GtkWidget *vga_item;
>  
> +    int nb_vcs;
> +    VirtualConsole vc[MAX_VCS];
> +
>      GtkWidget *show_tabs_item;
>  
>      GtkWidget *vbox;
> @@ -400,6 +405,15 @@ static void gd_menu_switch_vc(GtkMenuItem *item, void *opaque)
>  
>      if (gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(s->vga_item))) {
>          gtk_notebook_set_current_page(GTK_NOTEBOOK(s->notebook), 0);
> +    } else {
> +        int i;
> +
> +        for (i = 0; i < s->nb_vcs; i++) {
> +            if (gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(s->vc[i].menu_item))) {
> +                gtk_notebook_set_current_page(GTK_NOTEBOOK(s->notebook), i + 1);
> +                break;
> +            }
> +        }
>      }
>  }
>  
> @@ -418,16 +432,154 @@ static void gd_change_page(GtkNotebook *nb, gpointer arg1, guint arg2,
>                             gpointer data)
>  {
>      GtkDisplayState *s = data;
> +    guint last_page;
>  
>      if (!gtk_widget_get_realized(s->notebook)) {
>          return;
>      }
>  
> +    last_page = gtk_notebook_get_current_page(nb);
> +
> +    if (last_page) {
> +        gtk_widget_set_size_request(s->vc[last_page - 1].terminal, -1, -1);
> +    }
> +
> +    if (arg2 == 0) {
> +        gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(s->vga_item), TRUE);
> +    } else {
> +        VirtualConsole *vc = &s->vc[arg2 - 1];
> +        VteTerminal *term = VTE_TERMINAL(vc->terminal);
> +        int width, height;
> +
> +        width = 80 * vte_terminal_get_char_width(term);
> +        height = 25 * vte_terminal_get_char_height(term);
> +
> +        gtk_check_menu_item_set_active(GTK_CHECK_MENU_ITEM(vc->menu_item), TRUE);
> +        gtk_widget_set_size_request(vc->terminal, width, height);
> +    }        
> +
>      gd_update_cursor(s, TRUE);
>  }
>  
> +/** Virtual Console Callbacks **/
> +
> +static int gd_vc_chr_write(CharDriverState *chr, const uint8_t *buf, int len)
> +{
> +    VirtualConsole *vc = chr->opaque;
> +
> +    return write(vc->fd, buf, len);
> +}
> +
> +static int nb_vcs;
> +static CharDriverState *vcs[MAX_VCS];
> +
> +static CharDriverState *gd_vc_handler(QemuOpts *opts)
> +{
> +    CharDriverState *chr;
> +
> +    chr = g_malloc0(sizeof(*chr));
> +    chr->chr_write = gd_vc_chr_write;
> +
> +    vcs[nb_vcs++] = chr;
> +
> +    return chr;
> +}
> +
>  void early_gtk_display_init(void)
>  {
> +    register_vc_handler(gd_vc_handler);
> +}
> +
> +static gboolean gd_vc_in(GIOChannel *chan, GIOCondition cond, void *opaque)
> +{
> +    VirtualConsole *vc = opaque;
> +    uint8_t buffer[1024];
> +    ssize_t len;
> +
> +    len = read(vc->fd, buffer, sizeof(buffer));
> +    if (len <= 0) {
> +        return FALSE;
> +    }
> +
> +    qemu_chr_be_write(vc->chr, buffer, len);
> +
> +    return TRUE;
> +}
> +
> +static GSList *gd_vc_init(GtkDisplayState *s, VirtualConsole *vc, int index, GSList *group)
> +{
> +    const char *label;
> +    char buffer[32];
> +    char path[32];
> +    VtePty *pty;
> +    GIOChannel *chan;
> +    GtkWidget *scrolled_window;
> +    GtkAdjustment *hadjustment, *vadjustment;

Doesn't build without modifications:

ui/gtk.c: In function 'gd_vc_init':
ui/gtk.c:661:20: error: variable 'hadjustment' set but not used
[-Werror=unused-but-set-variable]
cc1: all warnings being treated as errors

Kevin