[PATCH weston v7 2/5] data-device: Implement DnD actions
Carlos Garnacho
carlosg at gnome.org
Wed Dec 23 18:24:44 PST 2015
The policy in weston in order to determine the chosen DnD action is
deliberately simple, and is probably the minimals that any compositor
should be doing here.
Besides honoring the set_actions requests on both wl_data_source and
wl_data_offer, weston now will emit the newly added "action" events
notifying both source and dest of the chosen action.
The "dnd" client has been updated too (although minimally), so it
notifies the compositor of a "move" action on both sides.
Changes since v6:
- Misc changes after updating the previous patch to make
wl_data_offer.finish with the wrong state an error.
Changes since v5:
- Use enum types and values for not-a-bitfield stored values.
handle errors when finding unexpected dnd_actions values.
Changes since v4:
- Added compositor-side version checks. Spaces vs tabs fixes.
Fixed resource versioning. Initialized new weston_data_source/offer
fields.
Changes since v3:
- Put data_source.action to use in the dnd client, now updates
the dnd surface like data_source.target events do.
Changes since v2:
- Split from DnD progress notification changes.
Changes since v1:
- Updated to v2 of DnD actions protocol changes, implement
wl_data_offer.source_actions.
- Fixed coding style issues.
Signed-off-by: Carlos Garnacho <carlosg at gnome.org>
Reviewed-by: Michael Catanzaro <mcatanzaro at igalia.com>
---
clients/dnd.c | 32 ++++++++++---
clients/window.c | 25 +++++++++++
src/compositor.h | 4 ++
src/data-device.c | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++++--
4 files changed, 183 insertions(+), 9 deletions(-)
diff --git a/clients/dnd.c b/clients/dnd.c
index 48111d9..ddf3fcc 100644
--- a/clients/dnd.c
+++ b/clients/dnd.c
@@ -72,6 +72,7 @@ struct dnd_drag {
struct item *item;
int x_offset, y_offset;
int width, height;
+ uint32_t dnd_action;
const char *mime_type;
struct wl_surface *drag_surface;
@@ -266,16 +267,13 @@ dnd_get_item(struct dnd *dnd, int32_t x, int32_t y)
}
static void
-data_source_target(void *data,
- struct wl_data_source *source, const char *mime_type)
+dnd_drag_update_surface(struct dnd_drag *dnd_drag)
{
- struct dnd_drag *dnd_drag = data;
struct dnd *dnd = dnd_drag->dnd;
cairo_surface_t *surface;
struct wl_buffer *buffer;
- dnd_drag->mime_type = mime_type;
- if (mime_type)
+ if (dnd_drag->mime_type && dnd_drag->dnd_action)
surface = dnd_drag->opaque;
else
surface = dnd_drag->translucent;
@@ -288,6 +286,16 @@ data_source_target(void *data,
}
static void
+data_source_target(void *data,
+ struct wl_data_source *source, const char *mime_type)
+{
+ struct dnd_drag *dnd_drag = data;
+
+ dnd_drag->mime_type = mime_type;
+ dnd_drag_update_surface(dnd_drag);
+}
+
+static void
data_source_send(void *data, struct wl_data_source *source,
const char *mime_type, int32_t fd)
{
@@ -360,12 +368,22 @@ data_source_drag_finished(void *data, struct wl_data_source *source)
dnd_drag_destroy(dnd_drag);
}
+static void
+data_source_action(void *data, struct wl_data_source *source, uint32_t dnd_action)
+{
+ struct dnd_drag *dnd_drag = data;
+
+ dnd_drag->dnd_action = dnd_action;
+ dnd_drag_update_surface(dnd_drag);
+}
+
static const struct wl_data_source_listener data_source_listener = {
data_source_target,
data_source_send,
data_source_cancelled,
data_source_drop_performed,
data_source_drag_finished,
+ data_source_action,
};
static cairo_surface_t *
@@ -428,6 +446,8 @@ create_drag_source(struct dnd *dnd,
dnd_drag->item = item;
dnd_drag->x_offset = x - item->x;
dnd_drag->y_offset = y - item->y;
+ dnd_drag->dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE;
+ dnd_drag->mime_type = NULL;
for (i = 0; i < ARRAY_LENGTH(dnd->items); i++) {
if (item == dnd->items[i]){
@@ -461,6 +481,8 @@ create_drag_source(struct dnd *dnd,
window_get_wl_surface(dnd->window),
dnd_drag->drag_surface,
serial);
+ wl_data_source_set_actions(dnd_drag->data_source,
+ WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE);
dnd_drag->opaque =
create_drag_icon(dnd_drag, item, x, y, 1);
diff --git a/clients/window.c b/clients/window.c
index db96185..9c67b91 100644
--- a/clients/window.c
+++ b/clients/window.c
@@ -3362,6 +3362,8 @@ struct data_offer {
int fd;
data_func_t func;
int32_t x, y;
+ uint32_t dnd_action;
+ uint32_t source_actions;
void *user_data;
};
@@ -3375,8 +3377,26 @@ data_offer_offer(void *data, struct wl_data_offer *wl_data_offer, const char *ty
*p = strdup(type);
}
+static void
+data_offer_source_actions(void *data, struct wl_data_offer *wl_data_offer, uint32_t source_actions)
+{
+ struct data_offer *offer = data;
+
+ offer->source_actions = source_actions;
+}
+
+static void
+data_offer_action(void *data, struct wl_data_offer *wl_data_offer, uint32_t dnd_action)
+{
+ struct data_offer *offer = data;
+
+ offer->dnd_action = dnd_action;
+}
+
static const struct wl_data_offer_listener data_offer_listener = {
data_offer_offer,
+ data_offer_source_actions,
+ data_offer_action
};
static void
@@ -3440,6 +3460,11 @@ data_device_enter(void *data, struct wl_data_device *data_device,
*p = NULL;
types_data = input->drag_offer->types.data;
+ wl_data_offer_set_actions(offer,
+ WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY |
+ WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE,
+ WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE);
+
} else {
input->drag_offer = NULL;
types_data = NULL;
diff --git a/src/compositor.h b/src/compositor.h
index 83d6f7f..2956f98 100644
--- a/src/compositor.h
+++ b/src/compositor.h
@@ -298,6 +298,8 @@ struct weston_data_offer {
struct wl_resource *resource;
struct weston_data_source *source;
struct wl_listener source_destroy_listener;
+ uint32_t dnd_actions;
+ enum wl_data_device_manager_dnd_action preferred_dnd_action;
};
struct weston_data_source {
@@ -307,6 +309,8 @@ struct weston_data_source {
struct weston_data_offer *offer;
struct weston_seat *seat;
bool accepted;
+ uint32_t dnd_actions;
+ enum wl_data_device_manager_dnd_action current_dnd_action;
void (*accept)(struct weston_data_source *source,
uint32_t serial, const char *mime_type);
diff --git a/src/data-device.c b/src/data-device.c
index 01b19e1..adae086 100644
--- a/src/data-device.c
+++ b/src/data-device.c
@@ -56,6 +56,10 @@ struct weston_touch_drag {
struct weston_touch_grab grab;
};
+#define ALL_ACTIONS (WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY | \
+ WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE | \
+ WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK)
+
static void
data_offer_accept(struct wl_client *client, struct wl_resource *resource,
uint32_t serial, const char *mime_type)
@@ -107,6 +111,86 @@ data_offer_notify_finish(struct weston_data_offer *offer)
offer->source->offer = NULL;
}
+static uint32_t
+data_offer_choose_action(struct weston_data_offer *offer)
+{
+ uint32_t available_actions, preferred_action = 0;
+ uint32_t source_actions, offer_actions;
+
+ if (wl_resource_get_version(offer->resource) >=
+ WL_DATA_OFFER_ACTION_SINCE_VERSION) {
+ offer_actions = offer->dnd_actions;
+ preferred_action = offer->preferred_dnd_action;
+ } else {
+ offer_actions = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
+ }
+
+ if (wl_resource_get_version(offer->source->resource) >=
+ WL_DATA_SOURCE_ACTION_SINCE_VERSION)
+ source_actions = offer->source->dnd_actions;
+ else
+ source_actions = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
+
+ available_actions = offer_actions & source_actions;
+
+ if (!available_actions)
+ return WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
+
+ /* If the dest side has a preferred DnD action, use it */
+ if ((preferred_action & available_actions) != 0)
+ return preferred_action;
+
+ /* Use the first found action, in bit order */
+ return 1 << (ffs(available_actions) - 1);
+}
+
+static void
+data_offer_update_action(struct weston_data_offer *offer)
+{
+ uint32_t action;
+
+ action = data_offer_choose_action(offer);
+
+ if (offer->source->current_dnd_action == action)
+ return;
+
+ offer->source->current_dnd_action = action;
+
+ if (wl_resource_get_version(offer->source->resource) >=
+ WL_DATA_SOURCE_ACTION_SINCE_VERSION)
+ wl_data_source_send_action(offer->source->resource, action);
+
+ if (wl_resource_get_version(offer->resource) >=
+ WL_DATA_OFFER_ACTION_SINCE_VERSION)
+ wl_data_offer_send_action(offer->resource, action);
+}
+
+static void
+data_offer_set_actions(struct wl_client *client,
+ struct wl_resource *resource,
+ uint32_t dnd_actions, uint32_t preferred_action)
+{
+ struct weston_data_offer *offer = wl_resource_get_user_data(resource);
+
+ if (dnd_actions & ~ALL_ACTIONS) {
+ wl_resource_post_error(offer->resource,
+ WL_DATA_OFFER_ERROR_INVALID_ACTION_MASK,
+ "invalid action mask %x", dnd_actions);
+ return;
+ }
+
+ if (__builtin_popcount(preferred_action) > 1) {
+ wl_resource_post_error(offer->resource,
+ WL_DATA_OFFER_ERROR_INVALID_ACTION,
+ "invalid action %x", preferred_action);
+ return;
+ }
+
+ offer->dnd_actions = dnd_actions;
+ offer->preferred_dnd_action = preferred_action;
+ data_offer_update_action(offer);
+}
+
static void
data_offer_finish(struct wl_client *client, struct wl_resource *resource)
{
@@ -119,7 +203,8 @@ data_offer_finish(struct wl_client *client, struct wl_resource *resource)
* if the negotiation is not at the right stage
*/
if (offer->source->seat ||
- !offer->source->accepted) {
+ !offer->source->accepted ||
+ !offer->source->current_dnd_action) {
wl_resource_post_error(offer->resource,
WL_DATA_OFFER_ERROR_INVALID_FINISH,
"premature finish request");
@@ -134,6 +219,7 @@ static const struct wl_data_offer_interface data_offer_interface = {
data_offer_receive,
data_offer_destroy,
data_offer_finish,
+ data_offer_set_actions,
};
static void
@@ -146,7 +232,7 @@ destroy_data_offer(struct wl_resource *resource)
* won't be called, so do this here as a safety net, because
* we still want the version >=3 drag source to be happy.
*/
- if (wl_resource_get_version (offer->source->resource) <
+ if (wl_resource_get_version(offer->source->resource) <
WL_DATA_SOURCE_DND_FINISHED_SINCE_VERSION)
data_offer_notify_finish(offer);
else
@@ -181,7 +267,8 @@ weston_data_source_send_offer(struct weston_data_source *source,
offer->resource =
wl_resource_create(wl_resource_get_client(target),
- &wl_data_offer_interface, 1, 0);
+ &wl_data_offer_interface,
+ wl_resource_get_version(source->resource), 0);
if (offer->resource == NULL) {
free(offer);
return NULL;
@@ -190,6 +277,8 @@ weston_data_source_send_offer(struct weston_data_source *source,
wl_resource_set_implementation(offer->resource, &data_offer_interface,
offer, destroy_data_offer);
+ offer->dnd_actions = 0;
+ offer->preferred_dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
offer->source = source;
offer->source_destroy_listener.notify = destroy_offer_data_source;
wl_signal_add(&source->destroy_signal,
@@ -202,6 +291,7 @@ weston_data_source_send_offer(struct weston_data_source *source,
source->offer = offer;
source->accepted = false;
+ data_offer_update_action(offer);
return offer->resource;
}
@@ -228,9 +318,40 @@ data_source_destroy(struct wl_client *client, struct wl_resource *resource)
wl_resource_destroy(resource);
}
+static void
+data_source_set_actions(struct wl_client *client,
+ struct wl_resource *resource,
+ uint32_t dnd_actions)
+{
+ struct weston_data_source *source =
+ wl_resource_get_user_data(resource);
+
+ if (dnd_actions & ~ALL_ACTIONS) {
+ wl_resource_post_error(source->resource,
+ WL_DATA_SOURCE_ERROR_INVALID_ACTION_MASK,
+ "invalid action mask %x", dnd_actions);
+ return;
+ }
+
+ if (source->dnd_actions == dnd_actions)
+ return;
+
+ source->dnd_actions = dnd_actions;
+
+ if (source->offer) {
+ if (wl_resource_get_version(source->offer->resource) >=
+ WL_DATA_OFFER_SOURCE_ACTIONS_SINCE_VERSION) {
+ wl_data_offer_send_source_actions(source->offer->resource,
+ dnd_actions);
+ }
+ data_offer_update_action(source->offer);
+ }
+}
+
static struct wl_data_source_interface data_source_interface = {
data_source_offer,
- data_source_destroy
+ data_source_destroy,
+ data_source_set_actions
};
static void
@@ -961,6 +1082,8 @@ create_data_source(struct wl_client *client,
source->cancel = client_source_cancel;
source->offer = NULL;
source->accepted = false;
+ source->dnd_actions = 0;
+ source->current_dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
wl_array_init(&source->mime_types);
--
2.5.0
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