[PATCH weston] compositor: allow to control the vt switching
Giulio Camuffo
giuliocamuffo at gmail.com
Sat Jun 4 17:25:24 UTC 2016
A compositor may want to control the vt switching, for example to
ensure to have a lock screen before it. To enable that add a vfunc
that will be called when CTRL+ALT+FN is pressed. The default behavior
is to do the switching, but the user can change it by using the new
weston_compositor_set_vt_switcher() function, so that it can delay the
switching to later, by calling weston_compositor_activate_vt().
Signed-off-by: Giulio Camuffo <giuliocamuffo at gmail.com>
---
Makefile.am | 2 +-
src/compositor.c | 18 ++++++++++++++++++
src/compositor.h | 39 +++++++++++++++++++++++++++++++++++++++
src/launcher-direct.c | 8 ++++++++
src/launcher-impl.h | 2 ++
src/launcher-logind.c | 8 ++++++++
src/launcher-util.c | 11 ++++++++++-
src/main.c | 1 +
8 files changed, 87 insertions(+), 2 deletions(-)
diff --git a/Makefile.am b/Makefile.am
index 2358000..f6e0ee9 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -66,7 +66,7 @@ libweston_la_CPPFLAGS = $(AM_CPPFLAGS) -DIN_WESTON
libweston_la_CFLAGS = $(AM_CFLAGS) $(COMPOSITOR_CFLAGS) $(LIBUNWIND_CFLAGS)
libweston_la_LIBADD = $(COMPOSITOR_LIBS) $(LIBUNWIND_LIBS) \
$(DLOPEN_LIBS) -lm $(CLOCK_GETTIME_LIBS) \
- $(LIBINPUT_BACKEND_LIBS) libshared.la
+ $(LIBINPUT_BACKEND_LIBS) libshared.la libsession-helper.la
libweston_la_LDFLAGS = -release ${LIBWESTON_ABI_VERSION}
libweston_la_SOURCES = \
diff --git a/src/compositor.c b/src/compositor.c
index bf8e5aa..938894b 100644
--- a/src/compositor.c
+++ b/src/compositor.c
@@ -54,6 +54,8 @@
#include "timeline.h"
#include "compositor.h"
+#include "launcher-impl.h"
+#include "launcher-util.h"
#include "scaler-server-protocol.h"
#include "presentation-time-server-protocol.h"
#include "shared/helpers.h"
@@ -4492,6 +4494,22 @@ compositor_bind(struct wl_client *client,
}
WL_EXPORT int
+weston_compositor_activate_vt(struct weston_compositor *compositor, int vt)
+{
+ if (compositor->launcher)
+ return weston_launcher_activate_vt(compositor->launcher, vt);
+ return -1;
+}
+
+WL_EXPORT void
+weston_compositor_set_vt_switcher(struct weston_compositor *compositor,
+ weston_compositor_vt_switcher_func_t switcher)
+{
+ if (compositor->launcher)
+ compositor->launcher->vt_switcher = switcher;
+}
+
+WL_EXPORT int
weston_environment_get_fd(const char *env)
{
char *e, *end;
diff --git a/src/compositor.h b/src/compositor.h
index f934aab..472e482 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -1369,6 +1369,45 @@ void
weston_compositor_set_default_pointer_grab(struct weston_compositor *compositor,
const struct weston_pointer_grab_interface *interface);
+/**
+ * Request a vt switch for the compositor.
+ *
+ * This will only work if the compositor is running as the owner of
+ * the session.
+ *
+ * \param launcher The compositor instance.
+ * \param vt The vt to switch to.
+ *
+ * Returns 0 on success, -1 otherwise.
+ *
+ * \sa weston_compositor_set_vt_switcher
+ */
+int
+weston_compositor_activate_vt(struct weston_compositor *compositor, int vt);
+
+typedef void (*weston_compositor_vt_switcher_func_t)(
+ struct weston_compositor *compositor, int vt);
+/**
+ * Set the vt switcher for the compositor.
+ *
+ * If the compositor is the owner of the session, the CTRL+ALT+FN key
+ * combinations will trigger a vt switch. The default behavior is to do
+ * the switching immediately, but some compositors may want to make sure to
+ * e.g. draw a lock screen before doing the switch.
+ * This function allows to register a custom vt switcher so that the actual
+ * vt switch can be controlled by calling \a weston_compositor_activate_vt.
+ *
+ * \param compositor The compositor instance.
+ * \param switcher The vt switcher function, which will be called when a
+ * CTRL+ALT+FN key combination is pressed, carrying the
+ * requested vt.
+ *
+ * \sa weston_compositor_activate_vt
+ */
+void
+weston_compositor_set_vt_switcher(struct weston_compositor *compositor,
+ weston_compositor_vt_switcher_func_t switcher);
+
int
weston_environment_get_fd(const char *env);
diff --git a/src/launcher-direct.c b/src/launcher-direct.c
index 29d9c28..fdf8b55 100644
--- a/src/launcher-direct.c
+++ b/src/launcher-direct.c
@@ -305,6 +305,13 @@ launcher_direct_destroy(struct weston_launcher *launcher_base)
free(launcher);
}
+static int
+launcher_direct_get_vt(struct weston_launcher *base)
+{
+ struct launcher_direct *launcher = wl_container_of(base, launcher, base);
+ return launcher->tty;
+}
+
struct launcher_interface launcher_direct_iface = {
launcher_direct_connect,
launcher_direct_destroy,
@@ -312,4 +319,5 @@ struct launcher_interface launcher_direct_iface = {
launcher_direct_close,
launcher_direct_activate_vt,
launcher_direct_restore,
+ launcher_direct_get_vt,
};
diff --git a/src/launcher-impl.h b/src/launcher-impl.h
index 742721b..8b0531d 100644
--- a/src/launcher-impl.h
+++ b/src/launcher-impl.h
@@ -34,10 +34,12 @@ struct launcher_interface {
void (* close) (struct weston_launcher *launcher, int fd);
int (* activate_vt) (struct weston_launcher *launcher, int vt);
void (* restore) (struct weston_launcher *launcher);
+ int (* get_vt) (struct weston_launcher *launcher);
};
struct weston_launcher {
struct launcher_interface *iface;
+ weston_compositor_vt_switcher_func_t vt_switcher;
};
extern struct launcher_interface launcher_logind_iface;
diff --git a/src/launcher-logind.c b/src/launcher-logind.c
index f755ec3..4680402 100644
--- a/src/launcher-logind.c
+++ b/src/launcher-logind.c
@@ -829,6 +829,13 @@ launcher_logind_destroy(struct weston_launcher *launcher)
free(wl);
}
+static int
+launcher_logind_get_vt(struct weston_launcher *launcher)
+{
+ struct launcher_logind *wl = wl_container_of(launcher, wl, base);
+ return wl->vtnr;
+}
+
struct launcher_interface launcher_logind_iface = {
launcher_logind_connect,
launcher_logind_destroy,
@@ -836,4 +843,5 @@ struct launcher_interface launcher_logind_iface = {
launcher_logind_close,
launcher_logind_activate_vt,
launcher_logind_restore,
+ launcher_logind_get_vt,
};
diff --git a/src/launcher-util.c b/src/launcher-util.c
index 03b9d63..7bd91ae 100644
--- a/src/launcher-util.c
+++ b/src/launcher-util.c
@@ -97,8 +97,17 @@ switch_vt_binding(struct weston_keyboard *keyboard,
uint32_t time, uint32_t key, void *data)
{
struct weston_compositor *compositor = data;
+ struct weston_launcher *launcher = compositor->launcher;
+ int vt = key - KEY_F1 + 1;
+ weston_compositor_vt_switcher_func_t switcher = launcher->vt_switcher;
- weston_launcher_activate_vt(compositor->launcher, key - KEY_F1 + 1);
+ if (vt == launcher->iface->get_vt(launcher))
+ return;
+
+ if (switcher)
+ launcher->vt_switcher(compositor, vt);
+ else
+ weston_launcher_activate_vt(launcher, vt);
}
WL_EXPORT void
diff --git a/src/main.c b/src/main.c
index d17d941..1cba49a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -54,6 +54,7 @@
#include "git-version.h"
#include "version.h"
#include "weston.h"
+#include "launcher-util.h"
#include "compositor-drm.h"
#include "compositor-headless.h"
--
2.8.3
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