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Initial scaffolding of layer shell

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This commit is contained in:
Drew DeVault 2018-03-17 15:07:48 -04:00
parent 575bc81d54
commit f29d8b55ae
7 changed files with 419 additions and 1 deletions
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1
include/rootston/desktop.h
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@ -48,6 +48,7 @@ struct roots_desktop {
struct wlr_idle *idle;
struct wlr_idle_inhibit_manager_v1 *idle_inhibit;
struct wlr_linux_dmabuf *linux_dmabuf;
struct wlr_layer_shell *layer_shell;
struct wl_listener new_output;
struct wl_listener layout_change;

29
include/wlr/types/wlr_layer_shell.h Normal file
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@ -0,0 +1,29 @@
#ifndef WLR_TYPES_WLR_LAYER_SHELL_H
#define WLR_TYPES_WLR_LAYER_SHELL_H
struct wlr_layer_shell {
struct wl_global *wl_global;
struct wl_list clients;
struct wl_listener display_destroy;
struct {
struct wl_signal new_surface;
} events;
void *data;
};
struct wlr_layer_client {
struct wlr_layer_shell *shell;
struct wl_resource *resource;
struct wl_client *client;
struct wl_list surfaces;
struct wl_list link; // wlr_layer_shell::clients
};
struct wlr_layer_shell *wlr_layer_shell_create(struct wl_display *display);
void wlr_layer_shell_destroy(struct wlr_layer_shell *layer_shell);
#endif

1
protocol/meson.build
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@ -30,6 +30,7 @@ protocols = [
'idle.xml',
'screenshooter.xml',
'server-decoration.xml',
'wlr-layer-shell-unstable-v1.xml',
]
client_protocols = [

277
protocol/wlr-layer-shell-unstable-v1.xml Normal file
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@ -0,0 +1,277 @@
<?xml version="1.0" encoding="UTF-8"?>
<protocol name="wlr_layer_shell_unstable_v1">
<copyright>
Copyright © 2017 Drew DeVault
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.
</copyright>
<interface name="zwlr_layer_shell_v1" version="1">
<description summary="create surfaces that are layers of the desktop">
Clients can use this interface to assign the surface_layer role to
wl_surfaces. Such surfaces are assigned to a "layer" of the output and
rendered with a defined z-depth respective to each other. They may also be
anchored to the edges and corners of a screen and specify input handling
semantics. This interface should be suitable for the implementation of
many desktop shell components, and a broad number of other applications
that interact with the desktop.
</description>
<request name="get_layer_surface">
<description summary="create a layer_surface from a surface">
Create a layer surface for an existing surface. This assigns the role of
layer_surface, or raises a protocol error if another role is already
assigned.
Creating a layer surface from a wl_surface which has a buffer attached
or committed is a client error, and any attempts by a client to attach
or manipulate a buffer prior to the first layer_surface.configure call
must also be treated as errors.
Clients can specify a namespace that defines the purpose of the layer
surface.
</description>
<arg name="id" type="new_id" interface="zwlr_layer_surface_v1"/>
<arg name="surface" type="object" interface="wl_surface"/>
<arg name="output" type="object" interface="wl_output"/>
<arg name="layer" type="uint" enum="layer" summary="layer to add this surface to"/>
<arg name="namespace" type="string" summary="namespace for the layer surface"/>
</request>
<enum name="error">
<entry name="role" value="0" summary="wl_surface has another role"/>
<entry name="invalid_layer" value="1" summary="layer value is invalid"/>
<entry name="already_constructed" value="2" summary="wl_surface has a buffer attached or committed"/>
<entry name="request_denied" value="4" summary="the compositor has denied your request to use this layer"/>
</enum>
<enum name="layer">
<description summary="available layers for surfaces">
These values indicate which layers a surface can be rendered in. They
are ordered by z depth, bottom-most first. Traditional shell surfaces
will typically be rendered between the bottom and top layers.
Fullscreen shell surfaces are typically rendered at the top layer.
Multiple surfaces can share a single layer, and ordering within a
single layer is undefined.
</description>
<entry name="background" value="0"/>
<entry name="bottom" value="1"/>
<entry name="top" value="2"/>
<entry name="overlay" value="3"/>
</enum>
</interface>
<interface name="zwlr_layer_surface_v1" version="1">
<description summary="layer metadata interface">
An interface that may be implemented by a wl_surface, for surfaces that
are designed to be rendered as a layer of a stacked desktop-like
environment.
Layer surface state (anchor, exclusive zone, margin) is double-buffered.
Protocol requests modify the pending state, as opposed to the current
state in use by the compositor. The wl_surface.commit request atomically
applies all pending state, replacing the current state. After commit, the
new pending state is as documented for each related request.
</description>
<request name="set_anchor">
<description summary="configures the anchor point of the surface">
Requests that the compositor anchor the surface to the specified edges
and corners. If two orthoginal edges are specified (e.g. 'top' and
'left'), then the anchor point will be the intersection of the edges
(e.g. the top left corner of the output); otherwise the anchor point
will be centered on that edge, or in the center if none is specified.
Anchor is double-buffered, see wl_surface.commit.
</description>
<arg name="anchor" type="uint" enum="anchor"/>
</request>
<request name="set_exclusive_zone">
<description summary="configures the exclusive geometry of this surface">
Requests that the compositor avoids occluding an area of the surface
with other surfaces. The compositor's use of this information is
implementation-dependent - do not assume that this region will not
actually be occluded.
This value is only meaningful if the surface is anchored to an edge,
rather than a corner. The zone is the number of pixels from the edge
that are considered exclusive.
Exclusive zone is double-buffered, see wl_surface.commit.
</description>
<arg name="zone" type="uint"/>
</request>
<request name="set_margin">
<description summary="sets a margin from the anchor point">
Requests that the surface be placed some distance away from the anchor
point on the output, in pixels. Setting this value for edges you are
not anchored to has no effect.
Margin is double-buffered, see wl_surface.commit.
</description>
<arg name="top" type="int"/>
<arg name="right" type="int"/>
<arg name="bottom" type="int"/>
<arg name="left" type="int"/>
</request>
<request name="get_popup">
<description summary="assign this layer_surface as an xdg_popup parent">
This assigns an xdg_popup's parent to this layer_surface. This popup
should have been created via xdg_surface::get_popup with the parent set
to NULL, and this request must be invoked before committing the popup's
initial state.
See the documentation of xdg_popup for more details about what an
xdg_popup is and how it is used.
</description>
<arg name="popup" type="object" interface="xdg_popup"/>
</request>
<request name="get_input">
<description summary="obtain a layer input for this layer surface">
This creates a layer input for this layer surface. This can be used to
control input semantics for the layer surface on the specified wl_seat.
</description>
<arg name="id" type="new_id" interface="zwlr_layer_input_v1"/>
<arg name="seat" type="object" interface="wl_seat"/>
</request>
<request name="ack_configure">
<description summary="ack a configure event">
When a configure event is received, if a client commits the
surface in response to the configure event, then the client
must make an ack_configure request sometime before the commit
request, passing along the serial of the configure event.
If the client receives multiple configure events before it
can respond to one, it only has to ack the last configure event.
A client is not required to commit immediately after sending
an ack_configure request - it may even ack_configure several times
before its next surface commit.
A client may send multiple ack_configure requests before committing, but
only the last request sent before a commit indicates which configure
event the client really is responding to.
</description>
<arg name="serial" type="uint" summary="the serial from the configure event"/>
</request>
<request name="destroy" type="destructor">
<description summary="destroy the layer_surface">
This request destroys the layer surface.
</description>
</request>
<event name="configure">
<description summary="suggest a surface change">
The configure event asks the client to resize its surface.
Clients should arrange their surface for the new states, and then send
an ack_configure request with the serial sent in this configure event at
some point before committing the new surface.
The client is free to dismiss all but the last configure event it
received.
The width and height arguments specify the size of the window in
surface-local coordinates.
The size is a hint, in the sense that the client is free to ignore it if
it doesn't resize, pick a smaller size (to satisfy aspect ratio or
resize in steps of NxM pixels). If the client picks a smaller size and
is anchored to two opposite anchors (e.g. 'top' and 'bottom'), the
surface will be centered on this axis.
If the width or height arguments are zero, it means the client should
decide its own window dimension.
</description>
<arg name="serial" type="uint"/>
<arg name="width" type="uint"/>
<arg name="height" type="uint"/>
</event>
<enum name="error">
<entry name="invalid_input_device" value="0" summary="input device bitfield is invalid"/>
<entry name="invalid_anchor" value="1" summary="anchor bitfield is invalid"/>
</enum>
<enum name="anchor" bitfield="true">
<entry name="top" value="1" summary="the top edge of the anchor rectangle"/>
<entry name="bottom" value="2" summary="the bottom edge of the anchor rectangle"/>
<entry name="left" value="4" summary="the left edge of the anchor rectangle"/>
<entry name="right" value="8" summary="the right edge of the anchor rectangle"/>
</enum>
</interface>
<interface name="zwlr_layer_input_v1" version="1">
<description summary="layer surface input configuration object">
Clients can use this interface to specify input semantics for a layer
surface on a given seat. By default, layer surfaces are considered
non-interactive by seats, and will not participate in their focus
semantics or receive input events for them.
Input state is double-buffered. Protocol requests modify the pending
state, as opposed to the current state in use by the compositor. The
wl_surface.commit request for the associated layer surface atomically
applies all pending state, replacing the current state. After commit, the
new pending state is as documented for each related request.
</description>
<request name="set_events">
<description summary="set input events to receive">
Requests that the seat send input events for the specified input devices
to this layer surface.
Positional events (pointer and touch) will only be sent if the layer
surface is the top-most interactive surface, and only when the position
of these events are relative to the surface. Enter and leave events will
be signalled normally in these cases.
Keyboard events will treat the layer surface as the only focused surface
on the seat. Upon requesting keyboard events, the layer surface will
receive a keyboard enter event. A leave event is signalled when it
invokes set_events again without keyboard events specified.
Events is double-buffered, see wl_surface.commit.
</description>
<arg name="events" type="uint" enum="input_device"/>
</request>
<request name="destroy" type="destructor">
<description summary="destroy the layer_input">
This request destroys the layer input.
</description>
</request>
<enum name="input_device" bitfield="true">
<entry name="pointer" value="1" summary="wl_pointer devices"/>
<entry name="keyboard" value="2" summary="wl_keyboard devices"/>
<entry name="touch" value="4" summary="wl_touch devices"/>
<entry name="tablet" value="8" summary="zwp_tablet and zwp_tablet_tool devices"/>
</enum>
</interface>
</protocol>

6
rootston/desktop.c
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@ -9,9 +9,10 @@
#include <wlr/types/wlr_cursor.h>
#include <wlr/types/wlr_gamma_control.h>
#include <wlr/types/wlr_idle.h>
#include <wlr/types/wlr_idle_inhibit_v1.h>
#include <wlr/types/wlr_layer_shell.h>
#include <wlr/types/wlr_linux_dmabuf.h>
#include <wlr/types/wlr_output_layout.h>
#include <wlr/types/wlr_idle_inhibit_v1.h>
#include <wlr/types/wlr_primary_selection.h>
#include <wlr/types/wlr_server_decoration.h>
#include <wlr/types/wlr_wl_shell.h>
@ -714,6 +715,9 @@ struct roots_desktop *desktop_create(struct roots_server *server,
&desktop->wl_shell_surface);
desktop->wl_shell_surface.notify = handle_wl_shell_surface;
desktop->layer_shell = wlr_layer_shell_create(server->wl_display);
// TODO: Pick up new surfaces
#ifdef WLR_HAS_XWAYLAND
const char *cursor_theme = NULL;
const char *cursor_default = ROOTS_XCURSOR_DEFAULT;

2
types/meson.build
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@ -8,8 +8,10 @@ lib_wlr_types = static_library(
'wlr_gamma_control.c',
'wlr_idle_inhibit_v1.c',
'wlr_idle.c',
'wlr_idle_inhibit_v1.c',
'wlr_input_device.c',
'wlr_keyboard.c',
'wlr_layer_shell.c',
'wlr_linux_dmabuf.c',
'wlr_list.c',
'wlr_matrix.c',

104
types/wlr_layer_shell.c Normal file
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@ -0,0 +1,104 @@
#include <assert.h>
#include <stdlib.h>
#include <wayland-server.h>
#include <wlr/types/wlr_layer_shell.h>
#include "wlr-layer-shell-unstable-v1-protocol.h"
static void layer_shell_handle_get_layer_surface(struct wl_client *client,
struct wl_resource *resource,
uint32_t id,
struct wl_resource *surface,
struct wl_resource *output,
uint32_t layer,
const char *namespace) {
// TODO
}
static struct zwlr_layer_shell_v1_interface layer_shell_impl = {
.get_layer_surface = layer_shell_handle_get_layer_surface,
};
static struct wlr_layer_client *layer_client_from_resource(
struct wl_resource *resource) {
assert(wl_resource_instance_of(resource, &zwlr_layer_shell_v1_interface,
&layer_shell_impl));
return wl_resource_get_user_data(resource);
}
static void wlr_layer_client_destroy(struct wl_resource *resource) {
struct wlr_layer_client *client = layer_client_from_resource(resource);
// TODO: Destroy surfaces
wl_list_remove(&client->link);
free(client);
}
static void layer_shell_bind(struct wl_client *wl_client, void *data,
uint32_t version, uint32_t id) {
struct wlr_layer_shell *layer_shell = data;
assert(wl_client && layer_shell);
struct wlr_layer_client *client =
calloc(1, sizeof(struct wlr_layer_client));
if (client == NULL) {
wl_client_post_no_memory(wl_client);
return;
}
wl_list_init(&client->surfaces);
client->resource = wl_resource_create(
wl_client, &zwlr_layer_shell_v1_interface, version, id);
if (client->resource == NULL) {
free(client);
wl_client_post_no_memory(wl_client);
return;
}
client->client = wl_client;
client->shell = layer_shell;
wl_resource_set_implementation(client->resource, &layer_shell_impl, client,
wlr_layer_client_destroy);
wl_list_insert(&layer_shell->clients, &client->link);
}
static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_layer_shell *layer_shell =
wl_container_of(listener, layer_shell, display_destroy);
wlr_layer_shell_destroy(layer_shell);
}
struct wlr_layer_shell *wlr_layer_shell_create(struct wl_display *display) {
struct wlr_layer_shell *layer_shell =
calloc(1, sizeof(struct wlr_layer_shell));
if (!layer_shell) {
return NULL;
}
wl_list_init(&layer_shell->clients);
struct wl_global *wl_global = wl_global_create(display,
&zwlr_layer_shell_v1_interface, 1, layer_shell, layer_shell_bind);
if (!wl_global) {
free(layer_shell);
return NULL;
}
layer_shell->wl_global = wl_global;
wl_signal_init(&layer_shell->events.new_surface);
layer_shell->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &layer_shell->display_destroy);
return layer_shell;
}
void wlr_layer_shell_destroy(struct wlr_layer_shell *layer_shell) {
if (!layer_shell) {
return;
}
wl_list_remove(&layer_shell->display_destroy.link);
wl_global_destroy(layer_shell->wl_global);
free(layer_shell);
}