Move data device implementation into wayland-server

1 files changed, 464 insertions, 0 deletions

diff --git a/src/data-device.c b/src/data-device.c
new file mode 100644
index 0000000..95b1a9d
--- /dev/null
+++ b/src/data-device.c
@@ -0,0 +1,464 @@
+/*
+ * Copyright © 2011 Kristian Høgsberg
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdio.h>
+
+#include "wayland-server.h"
+
+static void
+data_offer_accept(struct wl_client *client, struct wl_resource *resource,
+		  uint32_t time, const char *mime_type)
+{
+	struct wl_data_offer *offer = resource->data;
+
+	/* FIXME: Check that client is currently focused by the input
+	 * device that is currently dragging this data source.  Should
+	 * this be a wl_data_device request? */
+
+	if (offer->source)
+		wl_resource_post_event(&offer->source->resource,
+				       WL_DATA_SOURCE_TARGET, mime_type);
+}
+
+static void
+data_offer_receive(struct wl_client *client, struct wl_resource *resource,
+		   const char *mime_type, int32_t fd)
+{
+	struct wl_data_offer *offer = resource->data;
+
+	if (offer->source)
+		wl_resource_post_event(&offer->source->resource,
+				       WL_DATA_SOURCE_SEND, mime_type, fd);
+
+	close(fd);
+}
+
+static void
+data_offer_destroy(struct wl_client *client, struct wl_resource *resource)
+{
+	wl_resource_destroy(resource, 0);
+}
+
+static void
+destroy_data_offer(struct wl_resource *resource)
+{
+	struct wl_data_offer *offer = resource->data;
+
+	wl_list_remove(&offer->source_destroy_listener.link);
+	free(offer);
+}
+
+static const struct wl_data_offer_interface data_offer_interface = {
+	data_offer_accept,
+	data_offer_receive,
+	data_offer_destroy,
+};
+
+static void
+destroy_offer_data_source(struct wl_listener *listener,
+			  struct wl_resource *resource, uint32_t time)
+{
+	struct wl_data_offer *offer = resource->data;
+
+	offer->source = NULL;
+}
+
+static void
+data_source_cancel(struct wl_data_source *source)
+{
+	wl_resource_post_event(&source->resource, WL_DATA_SOURCE_CANCELLED);
+}
+
+static struct wl_resource *
+wl_data_source_send_offer(struct wl_data_source *source,
+			  struct wl_resource *target)
+{
+	struct wl_data_offer *offer;
+	char **p, **end;
+
+	offer = malloc(sizeof *offer);
+	if (offer == NULL)
+		return NULL;
+
+	offer->resource.destroy = destroy_data_offer;
+	offer->resource.object.id = 0;
+	offer->resource.object.interface = &wl_data_offer_interface;
+	offer->resource.object.implementation =
+		(void (**)(void)) source->offer_interface;
+	offer->resource.data = offer;
+	wl_list_init(&offer->resource.destroy_listener_list);
+
+	offer->source = source;
+	offer->source_destroy_listener.func = destroy_offer_data_source;
+	wl_list_insert(&source->resource.destroy_listener_list,
+		       &offer->source_destroy_listener.link);
+
+	wl_client_add_resource(target->client, &offer->resource);
+
+	wl_resource_post_event(target,
+			       WL_DATA_DEVICE_DATA_OFFER, &offer->resource);
+
+	end = source->mime_types.data + source->mime_types.size;
+	for (p = source->mime_types.data; p < end; p++)
+		wl_resource_post_event(&offer->resource,
+				       WL_DATA_OFFER_OFFER, *p);
+
+	return &offer->resource;
+}
+
+static void
+data_source_offer(struct wl_client *client,
+		  struct wl_resource *resource,
+		  const char *type)
+{
+	struct wl_data_source *source = resource->data;
+	char **p;
+
+	p = wl_array_add(&source->mime_types, sizeof *p);
+	if (p)
+		*p = strdup(type);
+	if (!p || !*p)
+		wl_resource_post_no_memory(resource);
+}
+
+static void
+data_source_destroy(struct wl_client *client, struct wl_resource *resource)
+{
+	wl_resource_destroy(resource, 0);
+}
+
+static struct wl_data_source_interface data_source_interface = {
+	data_source_offer,
+	data_source_destroy
+};
+
+static struct wl_resource *
+find_resource(struct wl_list *list, struct wl_client *client)
+{
+	struct wl_resource *r;
+
+	wl_list_for_each(r, list, link) {
+		if (r->client == client)
+			return r;
+	}
+
+	return NULL;
+}
+
+static void
+destroy_drag_focus(struct wl_listener *listener,
+		   struct wl_resource *resource, uint32_t time)
+{
+	struct wl_input_device *device =
+		container_of(listener, struct wl_input_device,
+			     drag_focus_listener);
+
+	device->drag_focus_resource = NULL;
+}
+
+static void
+drag_grab_focus(struct wl_grab *grab, uint32_t time,
+		struct wl_surface *surface, int32_t x, int32_t y)
+{
+	struct wl_input_device *device =
+		container_of(grab, struct wl_input_device, drag_grab);
+	struct wl_resource *resource, *offer;
+
+	if (device->drag_focus_resource) {
+		wl_resource_post_event(device->drag_focus_resource,
+				       WL_DATA_DEVICE_LEAVE);
+		wl_list_remove(&device->drag_focus_listener.link);
+		device->drag_focus_resource = NULL;
+		device->drag_focus = NULL;
+	}
+
+	if (surface)
+		resource = find_resource(&device->drag_resource_list, 
+					 surface->resource.client);
+	if (surface && resource) {
+		offer = wl_data_source_send_offer(device->drag_data_source,
+						  resource);
+
+		wl_resource_post_event(resource,
+				       WL_DATA_DEVICE_ENTER,
+				       time, surface, x, y, offer);
+
+		device->drag_focus = surface;
+		device->drag_focus_listener.func = destroy_drag_focus;
+		wl_list_insert(resource->destroy_listener_list.prev,
+			       &device->drag_focus_listener.link);
+		device->drag_focus_resource = resource;
+		grab->focus = surface;
+	}
+}
+
+static void
+drag_grab_motion(struct wl_grab *grab,
+		 uint32_t time, int32_t x, int32_t y)
+{
+	struct wl_input_device *device =
+		container_of(grab, struct wl_input_device, drag_grab);
+
+	if (device->drag_focus_resource)
+		wl_resource_post_event(device->drag_focus_resource,
+				       WL_DATA_DEVICE_MOTION, time, x, y);
+}
+
+static void
+drag_grab_button(struct wl_grab *grab,
+		 uint32_t time, int32_t button, int32_t state)
+{
+	struct wl_input_device *device =
+		container_of(grab, struct wl_input_device, drag_grab);
+
+	if (device->drag_focus_resource &&
+	    device->grab_button == button && state == 0)
+		wl_resource_post_event(device->drag_focus_resource,
+				       WL_DATA_DEVICE_DROP);
+
+	if (device->button_count == 0 && state == 0) {
+		wl_input_device_end_grab(device, time);
+		device->drag_data_source = NULL;
+	}
+}
+
+static const struct wl_grab_interface drag_grab_interface = {
+	drag_grab_focus,
+	drag_grab_motion,
+	drag_grab_button,
+};
+
+static void
+data_device_start_drag(struct wl_client *client, struct wl_resource *resource,
+		       struct wl_resource *source_resource,
+		       struct wl_resource *surface_resource, uint32_t time)
+{
+	struct wl_input_device *device = resource->data;
+
+	/* FIXME: Check that client has implicit grab on the surface
+	 * that matches the given time. */
+
+	/* FIXME: Check that the data source type array isn't empty. */
+
+	device->drag_grab.interface = &drag_grab_interface;
+	device->drag_data_source = source_resource->data;
+
+	wl_input_device_start_grab(device, &device->drag_grab, time);
+}
+
+static void
+data_device_attach(struct wl_client *client, struct wl_resource *resource,
+		   uint32_t time,
+		   struct wl_resource *buffer, int32_t x, int32_t y)
+{
+}
+
+static void
+destroy_selection_data_source(struct wl_listener *listener,
+			      struct wl_resource *resource, uint32_t time)
+{
+	struct wl_input_device *device =
+		container_of(listener, struct wl_input_device,
+			     selection_data_source_listener);
+	struct wl_resource *data_device, *focus;
+
+	device->selection_data_source = NULL;
+
+	focus = device->keyboard_focus_resource;
+	if (focus) {
+		data_device = find_resource(&device->drag_resource_list,
+					    focus->client);
+		wl_resource_post_event(data_device,
+				       WL_DATA_DEVICE_SELECTION, NULL);
+	}
+}
+
+WL_EXPORT void
+wl_input_device_set_selection(struct wl_input_device *device,
+			      struct wl_data_source *source, uint32_t time)
+{
+	struct wl_resource *data_device, *focus, *offer;
+	struct wl_selection_listener *listener, *next;
+
+	if (device->selection_data_source) {
+		device->selection_data_source->cancel(device->selection_data_source);
+		wl_list_remove(&device->selection_data_source_listener.link);
+		device->selection_data_source = NULL;
+	}
+
+	device->selection_data_source = source;
+
+	focus = device->keyboard_focus_resource;
+	if (focus) {
+		data_device = find_resource(&device->drag_resource_list,
+					    focus->client);
+		if (data_device) {
+			offer = wl_data_source_send_offer(device->selection_data_source,
+							  data_device);
+			wl_resource_post_event(data_device,
+					       WL_DATA_DEVICE_SELECTION,
+					       offer);
+		}
+	}
+
+	wl_list_for_each_safe(listener, next,
+			      &device->selection_listener_list, link)
+		listener->func(listener, device);
+
+	device->selection_data_source_listener.func =
+		destroy_selection_data_source;
+	wl_list_insert(source->resource.destroy_listener_list.prev,
+		       &device->selection_data_source_listener.link);
+}
+
+static void
+data_device_set_selection(struct wl_client *client,
+			  struct wl_resource *resource,
+			  struct wl_resource *source_resource, uint32_t time)
+{
+	if (!source_resource)
+		return;
+
+	wl_input_device_set_selection(resource->data,
+				      source_resource->data, time);
+}
+
+static const struct wl_data_device_interface data_device_interface = {
+	data_device_start_drag,
+	data_device_attach,
+	data_device_set_selection,
+};
+
+static void
+destroy_data_source(struct wl_resource *resource)
+{
+	struct wl_data_source *source =
+		container_of(resource, struct wl_data_source, resource);
+	char **p, **end;
+
+	end = source->mime_types.data + source->mime_types.size;
+	for (p = source->mime_types.data; p < end; p++)
+		free(*p);
+
+	wl_array_release(&source->mime_types);
+
+	source->resource.object.id = 0;
+}
+
+static void
+create_data_source(struct wl_client *client,
+		   struct wl_resource *resource, uint32_t id)
+{
+	struct wl_data_source *source;
+
+	source = malloc(sizeof *source);
+	if (source == NULL) {
+		wl_resource_post_no_memory(resource);
+		return;
+	}
+
+	source->resource.destroy = destroy_data_source;
+	source->resource.object.id = id;
+	source->resource.object.interface = &wl_data_source_interface;
+	source->resource.object.implementation =
+		(void (**)(void)) &data_source_interface;
+	source->resource.data = source;
+	wl_list_init(&source->resource.destroy_listener_list);
+
+	source->offer_interface = &data_offer_interface;
+	source->cancel = data_source_cancel;
+
+	wl_array_init(&source->mime_types);
+	wl_client_add_resource(client, &source->resource);
+}
+
+static void unbind_data_device(struct wl_resource *resource)
+{
+	wl_list_remove(&resource->link);
+	free(resource);
+}
+
+static void
+get_data_device(struct wl_client *client,
+		struct wl_resource *manager_resource,
+		uint32_t id, struct wl_resource *input_device)
+{
+	struct wl_input_device *device = input_device->data;
+	struct wl_resource *resource;
+
+	resource =
+		wl_client_add_object(client, &wl_data_device_interface,
+				     &data_device_interface, id, device);
+				     
+	wl_list_insert(&device->drag_resource_list, &resource->link);
+	resource->destroy = unbind_data_device;
+}
+
+static const struct wl_data_device_manager_interface manager_interface = {
+	create_data_source,
+	get_data_device
+};
+
+static void
+bind_manager(struct wl_client *client,
+	     void *data, uint32_t version, uint32_t id)
+{
+	wl_client_add_object(client, &wl_data_device_manager_interface,
+			     &manager_interface, id, NULL);
+}
+
+WL_EXPORT void
+wl_data_device_set_keyboard_focus(struct wl_input_device *device)
+{
+	struct wl_resource *data_device, *focus, *offer;
+	struct wl_data_source *source;
+
+	focus = device->keyboard_focus_resource;
+	if (!focus)
+		return;
+
+	data_device = find_resource(&device->drag_resource_list,
+				    focus->client);
+	if (!data_device)
+		return;
+
+	source = device->selection_data_source;
+	if (source) {
+		offer = wl_data_source_send_offer(source, data_device);
+		wl_resource_post_event(data_device,
+				       WL_DATA_DEVICE_SELECTION, offer);
+	}
+}
+
+WL_EXPORT int
+wl_data_device_manager_init(struct wl_display *display)
+{
+	if (wl_display_add_global(display,
+				  &wl_data_device_manager_interface,
+				  NULL, bind_manager) == NULL)
+		return -1;
+
+	return 0;
+}