libmks/lib/mks-display.c

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/* mks-display.c
*
* Copyright 2023 Christian Hergert <chergert@redhat.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
#include "config.h"
#include <stdlib.h>
#include "mks-css-private.h"
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#include "mks-display.h"
#include "mks-keyboard.h"
#include "mks-mouse.h"
#include "mks-paintable-private.h"
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#include "mks-screen.h"
#include "mks-util-private.h"
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#include "mks-keymap-xorgevdev2qnum-private.h"
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typedef struct
{
/* The screen being displayed. We've gotten a GdkPaintable from it
* which is connected to @picture for display.
*/
MksScreen *screen;
/* The paintable containing the screen content */
GdkPaintable *paintable;
gulong invalidate_contents_handler;
gulong invalidate_size_handler;
gulong notify_cursor_handler;
/* Tracking the last known positions of mouse events so that we may
* do something "reasonable" if the pointer is not absolute.
*/
double last_mouse_x;
double last_mouse_y;
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} MksDisplayPrivate;
enum {
PROP_0,
PROP_PAINTABLE,
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PROP_SCREEN,
N_PROPS
};
G_DEFINE_TYPE_WITH_PRIVATE (MksDisplay, mks_display, GTK_TYPE_WIDGET)
static GParamSpec *properties [N_PROPS];
static void
mks_display_get_paintable_area (MksDisplay *self,
graphene_rect_t *area)
{
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
int x, y, width, height;
double display_ratio;
double ratio;
double w, h;
g_assert (MKS_IS_DISPLAY (self));
g_assert (area != NULL);
width = gtk_widget_get_width (GTK_WIDGET (self));
height = gtk_widget_get_height (GTK_WIDGET (self));
display_ratio = (double)width / (double)height;
ratio = gdk_paintable_get_intrinsic_aspect_ratio (priv->paintable);
if (ratio > display_ratio)
{
w = width;
h = width / ratio;
}
else
{
w = height * ratio;
h = height;
}
x = (width - ceil (w)) / 2;
y = floor(height - ceil (h)) / 2;
*area = GRAPHENE_RECT_INIT (x, y, w, h);
}
static void
mks_display_invalidate_contents_cb (MksDisplay *self,
MksPaintable *paintable)
{
g_assert (MKS_IS_DISPLAY (self));
g_assert (MKS_IS_PAINTABLE (paintable));
gtk_widget_queue_draw (GTK_WIDGET (self));
}
static void
mks_display_invalidate_size_cb (MksDisplay *self,
MksPaintable *paintable)
{
g_assert (MKS_IS_DISPLAY (self));
g_assert (MKS_IS_PAINTABLE (paintable));
gtk_widget_queue_resize (GTK_WIDGET (self));
}
static void
mks_display_notify_cursor_cb (MksDisplay *self,
GParamSpec *pspec,
MksPaintable *paintable)
{
GdkCursor *cursor;
g_assert (MKS_IS_DISPLAY (self));
g_assert (MKS_IS_PAINTABLE (paintable));
cursor = _mks_paintable_get_cursor (paintable);
gtk_widget_set_cursor (GTK_WIDGET (self), cursor);
}
static void
mks_display_set_paintable (MksDisplay *self,
GdkPaintable *paintable)
{
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
g_assert (MKS_IS_DISPLAY (self));
g_assert (!paintable || GDK_IS_PAINTABLE (paintable));
if (priv->paintable == paintable)
return;
if (priv->paintable != NULL)
{
g_clear_signal_handler (&priv->invalidate_contents_handler, priv->paintable);
g_clear_signal_handler (&priv->invalidate_size_handler, priv->paintable);
g_clear_signal_handler (&priv->notify_cursor_handler, priv->paintable);
g_clear_object (&priv->paintable);
}
if (paintable != NULL)
{
priv->paintable = g_object_ref (paintable);
priv->invalidate_contents_handler =
g_signal_connect_object (paintable,
"invalidate-contents",
G_CALLBACK (mks_display_invalidate_contents_cb),
self,
G_CONNECT_SWAPPED);
priv->invalidate_size_handler =
g_signal_connect_object (paintable,
"invalidate-size",
G_CALLBACK (mks_display_invalidate_size_cb),
self,
G_CONNECT_SWAPPED);
priv->notify_cursor_handler =
g_signal_connect_object (paintable,
"notify::cursor",
G_CALLBACK (mks_display_notify_cursor_cb),
self,
G_CONNECT_SWAPPED);
}
g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_PAINTABLE]);
}
static void
mks_display_translate_keycode (MksDisplay *self,
guint keyval,
guint keycode,
guint *translated)
{
g_assert (MKS_IS_DISPLAY (self));
g_assert (translated != NULL);
if (keycode < xorgevdev_to_qnum_len &&
xorgevdev_to_qnum[keycode] != 0)
*translated = xorgevdev_to_qnum[keycode];
else
*translated = keycode;
}
static void
mks_display_keyboard_press_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksKeyboard *keyboard = (MksKeyboard *)object;
g_autoptr(MksDisplay) self = user_data;
g_autoptr(GError) error = NULL;
g_assert (MKS_IS_KEYBOARD (keyboard));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (MKS_IS_DISPLAY (self));
if (!mks_keyboard_press_finish (keyboard, result, &error))
g_warning ("Keyboard press failed: %s", error->message);
}
static void
mks_display_keyboard_release_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksKeyboard *keyboard = (MksKeyboard *)object;
g_autoptr(MksDisplay) self = user_data;
g_autoptr(GError) error = NULL;
g_assert (MKS_IS_KEYBOARD (keyboard));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (MKS_IS_DISPLAY (self));
if (!mks_keyboard_release_finish (keyboard, result, &error))
g_warning ("Keyboard release failed: %s", error->message);
}
static void
mks_display_mouse_move_to_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksMouse *mouse = (MksMouse *)object;
g_autoptr(MksDisplay) self = user_data;
g_autoptr(GError) error = NULL;
g_assert (MKS_IS_MOUSE (mouse));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (MKS_IS_DISPLAY (self));
if (!mks_mouse_move_to_finish (mouse, result, &error))
g_warning ("Failed move_to: %s", error->message);
}
static void
mks_display_mouse_move_by_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksMouse *mouse = (MksMouse *)object;
g_autoptr(MksDisplay) self = user_data;
g_autoptr(GError) error = NULL;
g_assert (MKS_IS_MOUSE (mouse));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (MKS_IS_DISPLAY (self));
if (!mks_mouse_move_by_finish (mouse, result, &error))
g_warning ("Failed move_by: %s", error->message);
}
static void
mks_display_translate_button (MksDisplay *self,
int *button)
{
g_assert (MKS_IS_DISPLAY (self));
g_assert (button != NULL);
switch (*button)
{
case 1: *button = MKS_MOUSE_BUTTON_LEFT; break;
case 2: *button = MKS_MOUSE_BUTTON_MIDDLE; break;
case 3: *button = MKS_MOUSE_BUTTON_RIGHT; break;
case 8: *button = MKS_MOUSE_BUTTON_SIDE; break;
case 9: *button = MKS_MOUSE_BUTTON_EXTRA; break;
default: break;
}
}
static void
mks_display_mouse_press_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksMouse *mouse = (MksMouse *)object;
g_autoptr(MksDisplay) self = user_data;
g_autoptr(GError) error = NULL;
g_assert (MKS_IS_MOUSE (mouse));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (MKS_IS_DISPLAY (self));
if (!mks_mouse_press_finish (mouse, result, &error))
g_warning ("Mouse press failed: %s", error->message);
}
static void
mks_display_mouse_release_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
MksMouse *mouse = (MksMouse *)object;
g_autoptr(MksDisplay) self = user_data;
g_autoptr(GError) error = NULL;
g_assert (MKS_IS_MOUSE (mouse));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (MKS_IS_DISPLAY (self));
if (!mks_mouse_release_finish (mouse, result, &error))
g_warning ("Mouse release failed: %s", error->message);
}
static gboolean
mks_display_legacy_event_cb (MksDisplay *self,
GdkEvent *event,
GtkEventControllerLegacy *controller)
{
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
GdkEventType event_type;
g_assert (MKS_IS_DISPLAY (self));
g_assert (event != NULL);
g_assert (GTK_IS_EVENT_CONTROLLER_LEGACY (controller));
if (priv->screen == NULL || priv->paintable == NULL)
return GDK_EVENT_PROPAGATE;
event_type = gdk_event_get_event_type (event);
switch ((int)event_type)
{
case GDK_MOTION_NOTIFY:
{
MksMouse *mouse = mks_screen_get_mouse (priv->screen);
GdkSurface *surface = gdk_event_get_surface (event);
GtkNative *native = gtk_widget_get_native (GTK_WIDGET (self));
int guest_width = gdk_paintable_get_intrinsic_width (priv->paintable);
int guest_height = gdk_paintable_get_intrinsic_height (priv->paintable);
graphene_rect_t area;
double translate_x;
double translate_y;
g_assert (MKS_IS_MOUSE (mouse));
g_assert (GDK_IS_SURFACE (surface));
mks_display_get_paintable_area (self, &area);
gtk_native_get_surface_transform (native, &translate_x, &translate_y);
if (mks_mouse_get_is_absolute (mouse))
{
gdouble x, y;
if (gdk_event_get_position (event, &x, &y))
{
x -= translate_x;
y -= translate_y;
gtk_widget_translate_coordinates (GTK_WIDGET (native),
GTK_WIDGET (self),
x, y, &x, &y);
if (graphene_rect_contains_point (&area, &GRAPHENE_POINT_INIT (x, y)))
{
double guest_x = floor (x) / area.size.width * guest_width;
double guest_y = floor (y) / area.size.height * guest_height;
mks_mouse_move_to (mouse,
guest_x,
guest_y,
NULL,
mks_display_mouse_move_to_cb,
g_object_ref (self));
return GDK_EVENT_STOP;
}
}
}
else
{
double x, y;
if (gdk_event_get_axis (event, GDK_AXIS_X, &x) &&
gdk_event_get_axis (event, GDK_AXIS_Y, &y))
{
double delta_x = floor (x - priv->last_mouse_x) / area.size.width * guest_width;
double delta_y = floor (y - priv->last_mouse_y) / area.size.height * guest_height;
priv->last_mouse_x = x;
priv->last_mouse_y = y;
mks_mouse_move_by (mouse,
delta_x,
delta_y,
NULL,
mks_display_mouse_move_by_cb,
g_object_ref (self));
return GDK_EVENT_STOP;
}
}
break;
}
case GDK_BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
{
MksMouse *mouse = mks_screen_get_mouse (priv->screen);
int button = gdk_button_event_get_button (event);
mks_display_translate_button (self, &button);
if (event_type == GDK_BUTTON_PRESS)
mks_mouse_press (mouse,
button,
NULL,
mks_display_mouse_press_cb,
g_object_ref (self));
else
mks_mouse_release (mouse,
button,
NULL,
mks_display_mouse_release_cb,
g_object_ref (self));
return GDK_EVENT_STOP;
}
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
{
MksKeyboard *keyboard = mks_screen_get_keyboard (priv->screen);
guint keycode = gdk_key_event_get_keycode (event);
guint keyval = gdk_key_event_get_keycode (event);
guint qkeycode;
mks_display_translate_keycode (self, keyval, keycode, &qkeycode);
if (event_type == GDK_KEY_PRESS)
mks_keyboard_press (keyboard,
qkeycode,
NULL,
mks_display_keyboard_press_cb,
g_object_ref (self));
else
mks_keyboard_release (keyboard,
qkeycode,
NULL,
mks_display_keyboard_release_cb,
g_object_ref (self));
return GDK_EVENT_STOP;
}
case GDK_SCROLL:
{
MksMouse *mouse = mks_screen_get_mouse (priv->screen);
GdkScrollDirection direction = gdk_scroll_event_get_direction (event);
gboolean inverted = mks_scroll_event_is_inverted (event);
int button = -1;
switch (direction)
{
case GDK_SCROLL_UP:
button = MKS_MOUSE_BUTTON_WHEEL_UP;
break;
case GDK_SCROLL_DOWN:
button = MKS_MOUSE_BUTTON_WHEEL_DOWN;
break;
case GDK_SCROLL_LEFT:
case GDK_SCROLL_RIGHT:
case GDK_SCROLL_SMOOTH:
default:
break;
}
if (button != -1)
{
if (inverted)
{
if (button == MKS_MOUSE_BUTTON_WHEEL_UP)
button = MKS_MOUSE_BUTTON_WHEEL_DOWN;
else if (button == MKS_MOUSE_BUTTON_WHEEL_DOWN)
button = MKS_MOUSE_BUTTON_WHEEL_UP;
}
mks_mouse_press (mouse,
button,
NULL,
mks_display_mouse_press_cb,
g_object_ref (self));
return GDK_EVENT_STOP;
}
break;
}
default:
break;
}
return GDK_EVENT_PROPAGATE;
}
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static void
mks_display_attach_cb (GObject *object,
GAsyncResult *result,
gpointer user_data)
{
g_autoptr(MksDisplay) self = user_data;
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
MksScreen *screen = (MksScreen *)object;
g_autoptr(GdkPaintable) paintable = NULL;
g_autoptr(GError) error = NULL;
g_assert (MKS_IS_SCREEN (screen));
g_assert (G_IS_ASYNC_RESULT (result));
g_assert (MKS_IS_DISPLAY (self));
paintable = mks_screen_attach_finish (screen, result, &error);
if (priv->screen != screen)
return;
mks_display_set_paintable (self, paintable);
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}
static void
mks_display_connect (MksDisplay *self,
MksScreen *screen)
{
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
g_assert (MKS_IS_DISPLAY (self));
g_assert (priv->screen == NULL);
g_set_object (&priv->screen, screen);
mks_screen_attach (screen,
NULL,
mks_display_attach_cb,
g_object_ref (self));
}
static void
mks_display_disconnect (MksDisplay *self)
{
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
g_assert (MKS_IS_DISPLAY (self));
g_assert (priv->screen != NULL);
mks_display_set_paintable (self, NULL);
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g_clear_object (&priv->screen);
}
static void
mks_display_dispose (GObject *object)
{
MksDisplay *self = (MksDisplay *)object;
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
if (priv->screen != NULL)
mks_display_disconnect (self);
G_OBJECT_CLASS (mks_display_parent_class)->dispose (object);
}
static void
mks_display_snapshot (GtkWidget *widget,
GtkSnapshot *snapshot)
{
MksDisplay *self = (MksDisplay *)widget;
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
graphene_rect_t area;
if (priv->paintable == NULL)
return;
mks_display_get_paintable_area (self, &area);
gtk_snapshot_save (snapshot);
gtk_snapshot_translate (snapshot, &area.origin);
gdk_paintable_snapshot (priv->paintable, snapshot, area.size.width, area.size.height);
gtk_snapshot_restore (snapshot);
}
static GtkSizeRequestMode
mks_display_get_request_mode (GtkWidget *widget)
{
return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
}
static void
mks_display_measure (GtkWidget *widget,
GtkOrientation orientation,
int for_size,
int *minimum,
int *natural,
int *minimum_baseline,
int *natural_baseline)
{
MksDisplay *self = (MksDisplay *)widget;
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
double min_width, min_height, nat_width, nat_height;
int default_width;
int default_height;
g_assert (MKS_IS_DISPLAY (self));
if (priv->paintable == NULL || for_size == 0)
{
*minimum = 0;
*natural = 0;
return;
}
default_width = gdk_paintable_get_intrinsic_width (priv->paintable);
default_height = gdk_paintable_get_intrinsic_width (priv->paintable);
if (default_width <= 0)
default_width = 640;
if (default_height <= 0)
default_height = 480;
gdk_paintable_compute_concrete_size (priv->paintable,
0, 0,
default_width, default_height,
&min_width, &min_height);
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
gdk_paintable_compute_concrete_size (priv->paintable,
0,
for_size < 0 ? 0 : for_size,
default_width, default_height,
&nat_width, &nat_height);
*minimum = ceil (min_width);
*natural = ceil (nat_width);
}
else
{
gdk_paintable_compute_concrete_size (priv->paintable,
for_size < 0 ? 0 : for_size,
0,
default_width, default_height,
&nat_width, &nat_height);
*minimum = ceil (min_height);
*natural = ceil (nat_height);
}
}
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static void
mks_display_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
MksDisplay *self = MKS_DISPLAY (object);
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
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switch (prop_id)
{
case PROP_PAINTABLE:
g_value_set_object (value, priv->paintable);
break;
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case PROP_SCREEN:
g_value_set_object (value, mks_display_get_screen (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
mks_display_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
MksDisplay *self = MKS_DISPLAY (object);
switch (prop_id)
{
case PROP_SCREEN:
mks_display_set_screen (self, g_value_get_object (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
}
}
static void
mks_display_class_init (MksDisplayClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->dispose = mks_display_dispose;
object_class->get_property = mks_display_get_property;
object_class->set_property = mks_display_set_property;
widget_class->get_request_mode = mks_display_get_request_mode;
widget_class->measure = mks_display_measure;
widget_class->snapshot = mks_display_snapshot;
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properties [PROP_PAINTABLE] =
g_param_spec_object ("paintable", NULL, NULL,
GDK_TYPE_PAINTABLE,
(G_PARAM_READABLE | G_PARAM_STATIC_STRINGS));
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properties[PROP_SCREEN] =
g_param_spec_object ("screen", NULL, NULL,
MKS_TYPE_SCREEN,
(G_PARAM_READWRITE | G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS));
g_object_class_install_properties (object_class, N_PROPS, properties);
gtk_widget_class_set_css_name (widget_class, "MksDisplay");
_mks_css_init ();
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}
static void
mks_display_init (MksDisplay *self)
{
GtkEventController *controller;
controller = gtk_event_controller_legacy_new ();
g_signal_connect_object (controller,
"event",
G_CALLBACK (mks_display_legacy_event_cb),
self,
G_CONNECT_SWAPPED);
gtk_widget_add_controller (GTK_WIDGET (self), controller);
gtk_widget_set_focusable (GTK_WIDGET (self), TRUE);
gtk_widget_set_cursor_from_name (GTK_WIDGET (self), "none");
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}
GtkWidget *
mks_display_new (void)
{
return g_object_new (MKS_TYPE_DISPLAY, NULL);
}
/**
* mks_display_get_screen:
* @self: a #MksDisplay
*
* Gets the screen connected to the display.
*
* Returns: (transfer none): a #MksScreen
*/
MksScreen *
mks_display_get_screen (MksDisplay *self)
{
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
g_return_val_if_fail (MKS_IS_DISPLAY (self), NULL);
return priv->screen;
}
void
mks_display_set_screen (MksDisplay *self,
MksScreen *screen)
{
MksDisplayPrivate *priv = mks_display_get_instance_private (self);
g_return_if_fail (MKS_IS_DISPLAY (self));
if (priv->screen == screen)
return;
if (priv->screen != NULL)
mks_display_disconnect (self);
if (screen != NULL)
mks_display_connect (self, screen);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SCREEN]);
}