Add wlr_primary_selection_device_manager and wlr_primary_selection_source

.editorconfig

@@ -11,3 +11,4 @@ trim_trailing_whitespace = true
 [*.xml]
 indent_style = space
 indent_size = 2
+tab_width = 8

include/wlr/types/wlr_primary_selection.h

@@ -0,0 +1,31 @@
+#ifndef WLR_TYPES_WLR_PRIMARY_SELECTION_H
+#define WLR_TYPES_WLR_PRIMARY_SELECTION_H
+
+#include <wayland-server.h>
+
+struct wlr_primary_selection_device_manager {
+	struct wl_global *global;
+
+	struct wl_listener display_destroy;
+
+	void *data;
+};
+
+struct wlr_primary_selection_source {
+	struct wl_resource *resource;
+
+	struct wl_array mime_types;
+
+	struct {
+		struct wl_signal destroy;
+	} events;
+
+	void *data;
+};
+
+struct wlr_primary_selection_device_manager *
+	wlr_primary_selection_device_manager_create(struct wl_display *display);
+void wlr_primary_selection_device_manager_destroy(
+	struct wlr_primary_selection_device_manager *manager);
+
+#endif

protocol/gtk-primary-selection.xml

@@ -0,0 +1,225 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="gtk_primary_selection">
+  <copyright>
+    Copyright © 2015, 2016 Red Hat
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice (including the next
+    paragraph) shall be included in all copies or substantial portions of the
+    Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+  </copyright>
+
+  <description summary="Primary selection protocol">
+    This protocol provides the ability to have a primary selection device to
+    match that of the X server. This primary selection is a shortcut to the
+    common clipboard selection, where text just needs to be selected in order
+    to allow copying it elsewhere. The de facto way to perform this action
+    is the middle mouse button, although it is not limited to this one.
+
+    Clients wishing to honor primary selection should create a primary
+    selection source and set it as the selection through
+    wp_primary_selection_device.set_selection whenever the text selection
+    changes. In order to minimize calls in pointer-driven text selection,
+    it should happen only once after the operation finished. Similarly,
+    a NULL source should be set when text is unselected.
+
+    wp_primary_selection_offer objects are first announced through the
+    wp_primary_selection_device.data_offer event. Immediately after this event,
+    the primary data offer will emit wp_primary_selection_offer.offer events
+    to let know of the mime types being offered.
+
+    When the primary selection changes, the client with the keyboard focus
+    will receive wp_primary_selection_device.selection events. Only the client
+    with the keyboard focus will receive such events with a non-NULL
+    wp_primary_selection_offer. Across keyboard focus changes, previously
+    focused clients will receive wp_primary_selection_device.events with a
+    NULL wp_primary_selection_offer.
+
+    In order to request the primary selection data, the client must pass
+    a recent serial pertaining to the press event that is triggering the
+    operation, if the compositor deems the serial valid and recent, the
+    wp_primary_selection_source.send event will happen in the other end
+    to let the transfer begin. The client owning the primary selection
+    should write the requested data, and close the file descriptor
+    immediately.
+
+    If the primary selection owner client disappeared during the transfer,
+    the client reading the data will receive a
+    wp_primary_selection_device.selection event with a NULL
+    wp_primary_selection_offer, the client should take this as a hint
+    to finish the reads related to the no longer existing offer.
+
+    The primary selection owner should be checking for errors during
+    writes, merely cancelling the ongoing transfer if any happened.
+  </description>
+
+  <interface name="gtk_primary_selection_device_manager" version="1">
+    <description summary="X primary selection emulation">
+      The primary selection device manager is a singleton global object that
+      provides access to the primary selection. It allows to create
+      wp_primary_selection_source objects, as well as retrieving the per-seat
+      wp_primary_selection_device objects.
+    </description>
+
+    <request name="create_source">
+      <description summary="create a new primary selection source">
+	Create a new primary selection source.
+      </description>
+      <arg name="id" type="new_id" interface="gtk_primary_selection_source"/>
+    </request>
+
+    <request name="get_device">
+      <description summary="create a new primary selection device">
+        Create a new data device for a given seat.
+      </description>
+      <arg name="id" type="new_id" interface="gtk_primary_selection_device"/>
+      <arg name="seat" type="object" interface="wl_seat"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the primary selection device manager">
+	Destroy the primary selection device manager.
+      </description>
+    </request>
+  </interface>
+
+  <interface name="gtk_primary_selection_device" version="1">
+    <request name="set_selection">
+      <description summary="set the primary selection">
+	Replaces the current selection. The previous owner of the primary selection
+	will receive a wp_primary_selection_source.cancelled event.
+
+	To unset the selection, set the source to NULL.
+      </description>
+      <arg name="source" type="object" interface="gtk_primary_selection_source" allow-null="true"/>
+      <arg name="serial" type="uint" summary="serial of the event that triggered this request"/>
+    </request>
+
+    <event name="data_offer">
+      <description summary="introduce a new wp_primary_selection_offer">
+	Introduces a new wp_primary_selection_offer object that may be used
+	to receive the current primary selection. Immediately following this
+	event, the new wp_primary_selection_offer object will send
+	wp_primary_selection_offer.offer events to describe the offered mime
+	types.
+      </description>
+      <arg name="offer" type="new_id" interface="gtk_primary_selection_offer"/>
+    </event>
+
+    <event name="selection">
+      <description summary="advertise a new primary selection">
+	The wp_primary_selection_device.selection event is sent to notify the
+	client of a new primary selection. This event is sent after the
+	wp_primary_selection.data_offer event introducing this object, and after
+	the offer has announced its mimetypes through
+	wp_primary_selection_offer.offer.
+
+	The data_offer is valid until a new offer or NULL is received
+	or until the client loses keyboard focus. The client must destroy the
+	previous selection data_offer, if any, upon receiving this event.
+      </description>
+      <arg name="id" type="object" interface="gtk_primary_selection_offer" allow-null="true"/>
+    </event>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the primary selection device">
+	Destroy the primary selection device.
+      </description>
+    </request>
+  </interface>
+
+  <interface name="gtk_primary_selection_offer" version="1">
+    <description summary="offer to transfer primary selection contents">
+      A wp_primary_selection_offer represents an offer to transfer the contents
+      of the primary selection clipboard to the client. Similar to
+      wl_data_offer, the offer also describes the mime types that the source
+      will transferthat the
+      data can be converted to and provides the mechanisms for transferring the
+      data directly to the client.
+    </description>
+
+    <request name="receive">
+      <description summary="request that the data is transferred">
+	To transfer the contents of the primary selection clipboard, the client
+	issues this request and indicates the mime type that it wants to
+	receive. The transfer happens through the passed file descriptor
+	(typically created with the pipe system call). The source client writes
+	the data in the mime type representation requested and then closes the
+	file descriptor.
+
+	The receiving client reads from the read end of the pipe until EOF and
+	closes its end, at which point the transfer is complete.
+      </description>
+      <arg name="mime_type" type="string"/>
+      <arg name="fd" type="fd"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the primary selection offer">
+	Destroy the primary selection offer.
+      </description>
+    </request>
+
+    <event name="offer">
+      <description summary="advertise offered mime type">
+	Sent immediately after creating announcing the wp_primary_selection_offer
+	through wp_primary_selection_device.data_offer. One event is sent per
+	offered mime type.
+      </description>
+      <arg name="mime_type" type="string"/>
+    </event>
+  </interface>
+
+  <interface name="gtk_primary_selection_source" version="1">
+    <description summary="offer to replace the contents of the primary selection">
+      The source side of a wp_primary_selection_offer, it provides a way to
+      describe the offered data and respond to requests to transfer the
+      requested contents of the primary selection clipboard.
+    </description>
+
+    <request name="offer">
+      <description summary="add an offered mime type">
+	This request adds a mime type to the set of mime types advertised to
+	targets. Can be called several times to offer multiple types.
+      </description>
+      <arg name="mime_type" type="string"/>
+    </request>
+
+    <request name="destroy" type="destructor">
+      <description summary="destroy the primary selection source">
+	Destroy the primary selection source.
+      </description>
+    </request>
+
+    <event name="send">
+      <description summary="send the primary selection contents">
+	Request for the current primary selection contents from the client.
+	Send the specified mime type over the passed file descriptor, then
+	close it.
+      </description>
+      <arg name="mime_type" type="string"/>
+      <arg name="fd" type="fd"/>
+    </event>
+
+    <event name="cancelled">
+      <description summary="request for primary selection contents was canceled">
+	This primary selection source is no longer valid. The client should
+	clean up and destroy this primary selection source.
+      </description>
+    </event>
+  </interface>
+</protocol>

protocol/meson.build

@@ -23,6 +23,7 @@ wayland_scanner_client = generator(
 protocols = [
 	[wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml'],
 	'gamma-control.xml',
+	'gtk-primary-selection.xml',
 	'screenshooter.xml',
 	'server-decoration.xml',
 ]
@@ -30,6 +31,7 @@ protocols = [
 client_protocols = [
 	[wl_protocol_dir, 'unstable/xdg-shell/xdg-shell-unstable-v6.xml'],
 	'gamma-control.xml',
+	'gtk-primary-selection.xml',
 	'screenshooter.xml',
 	'server-decoration.xml',
 ]

types/meson.build

@@ -12,6 +12,7 @@ lib_wlr_types = static_library(
 		'wlr_output.c',
 		'wlr_output_layout.c',
 		'wlr_pointer.c',
+		'wlr_primary_selection.c',
 		'wlr_region.c',
 		'wlr_screenshooter.c',
 		'wlr_seat.c',

types/wlr_primary_selection.c

@@ -0,0 +1,131 @@
+#define _XOPEN_SOURCE 700
+#include <stdlib.h>
+#include <string.h>
+#include <gtk-primary-selection-protocol.h>
+#include <wlr/types/wlr_primary_selection.h>
+#include <wlr/util/log.h>
+
+static void source_handle_offer(struct wl_client *client,
+		struct wl_resource *resource, const char *mime_type) {
+	struct wlr_primary_selection_source *source =
+		wl_resource_get_user_data(resource);
+
+	char **p = wl_array_add(&source->mime_types, sizeof(*p));
+	if (p) {
+		*p = strdup(mime_type);
+	}
+	if (p == NULL || *p == NULL) {
+		wl_resource_post_no_memory(resource);
+	}
+}
+
+static void source_handle_destroy(struct wl_client *client,
+		struct wl_resource *resource) {
+	wl_resource_destroy(resource);
+}
+
+static const struct gtk_primary_selection_source_interface source_impl = {
+	.offer = source_handle_offer,
+	.destroy = source_handle_destroy,
+};
+
+static void source_resource_handle_destroy( struct wl_resource *resource) {
+	struct wlr_primary_selection_source *source =
+		wl_resource_get_user_data(resource);
+	wl_signal_emit(&source->events.destroy, source);
+	free(source);
+}
+
+static void device_manager_handle_create_source(struct wl_client *client,
+		struct wl_resource *manager_resource, uint32_t id) {
+	//struct wlr_primary_selection_device_manager *manager =
+	//	wl_resource_get_user_data(manager_resource);
+
+	struct wlr_primary_selection_source *source =
+		calloc(1, sizeof(struct wlr_primary_selection_source));
+	if (source == NULL) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+
+	int version = wl_resource_get_version(manager_resource);
+	source->resource = wl_resource_create(client,
+		&gtk_primary_selection_source_interface, version, id);
+	if (source->resource == NULL) {
+		free(source);
+		wl_client_post_no_memory(client);
+		return;
+	}
+	wl_resource_set_implementation(source->resource, &source_impl, source,
+		source_resource_handle_destroy);
+
+	wl_signal_init(&source->events.destroy);
+	wl_array_init(&source->mime_types);
+
+	wlr_log(L_DEBUG, "new gtk_primary_selection_source %p (res %p)", source,
+		source->resource);
+}
+
+static void device_manager_handle_destroy(struct wl_client *client,
+		struct wl_resource *manager_resource) {
+	wl_resource_destroy(manager_resource);
+}
+
+static const struct gtk_primary_selection_device_manager_interface
+device_manager_impl = {
+	.create_source = device_manager_handle_create_source,
+	//.get_device = device_manager_handle_get_device,
+	.destroy = device_manager_handle_destroy,
+};
+
+static void primary_selection_device_manager_bind(struct wl_client *client,
+		void *data, uint32_t version, uint32_t id) {
+	struct wlr_primary_selection_device_manager *manager = data;
+
+	struct wl_resource *resource = wl_resource_create(client,
+		&gtk_primary_selection_device_manager_interface, version, id);
+	if (resource == NULL) {
+		wl_client_post_no_memory(client);
+		return;
+	}
+	wl_resource_set_implementation(resource, &device_manager_impl, manager,
+		NULL);
+}
+
+static void handle_display_destroy(struct wl_listener *listener, void *data) {
+	struct wlr_primary_selection_device_manager *manager =
+		wl_container_of(listener, manager, display_destroy);
+	wlr_primary_selection_device_manager_destroy(manager);
+}
+
+struct wlr_primary_selection_device_manager *
+		wlr_primary_selection_device_manager_create(
+		struct wl_display *display) {
+	struct wlr_primary_selection_device_manager *manager =
+		calloc(1, sizeof(struct wlr_primary_selection_device_manager));
+	if (manager == NULL) {
+		return NULL;
+	}
+	manager->global = wl_global_create(display,
+		&gtk_primary_selection_device_manager_interface, 1, manager,
+		primary_selection_device_manager_bind);
+	if (manager->global == NULL) {
+		free(manager);
+		return NULL;
+	}
+
+	manager->display_destroy.notify = handle_display_destroy;
+	wl_display_add_destroy_listener(display, &manager->display_destroy);
+
+	return manager;
+}
+
+void wlr_primary_selection_device_manager_destroy(
+		struct wlr_primary_selection_device_manager *manager) {
+	if (manager == NULL) {
+		return;
+	}
+	// TODO: free wl_resources
+	wl_global_destroy(manager->global);
+	free(manager);
+}