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dwl-patches/simple-touch-input/simple-touch-input.patch
A Frederick Christensen 3a71377bb0
Update simple-touch-input patch
2024-01-25 19:21:21 -06:00

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From 9d50f0acc00cf608a6841b02821796b300126624 Mon Sep 17 00:00:00 2001
From: A Frederick Christensen <dwl@ivories.org>
Date: Sun, 14 Jan 2024 08:30:31 -0600
Subject: [PATCH] Add SIMPLE touchscreen handling
This is based in part on original work by Bastien Brouant, "Unprex" at
https://github.com/Unprex/dwl
!!!!!!!!!!!!!!!
This patch may be used with or without the pointer-constraints branch
from anon_cvptw's repository
https://codeberg.org/anon_cvptw/dwl/src/branch/main
In maintaining this patch, be sure to watch for changes to the
`motionabsolute` function in anon_cvptw's `main` branch:
The `touchdown` function here incorporates the contents of the
`motionabsolute` function, adds in the `wlr_cursor_warp_closest` call
and then the button press
If `motionabsolute` is modified, `touchdown` should [likely] mirror
any of its modifications.
If/when anon_cvptw's pointer-constraints pull request is merged into
the upstream https://codeberg.org/dwl/dwl codebase, this remark will
be removed from the simple-touch-input patch branch commit, and things
will be significantly simplified.
KNOWN BUGS:
- Sometimes, the pointer moves to where the screen is pressed, but the
button press doesn't occur until the screen is touched AGAIN. This
means that if you touch to click button 'Q' on the screen (for
instance), nothing happens; then you touch elsewhere on the screen and
THEN button 'Q' registers a click. This is annoying, doesn't always
happen, and I don't yet know how to fix it.
!!!!!!!!!!!!!!!
---
dwl.c | 87 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 87 insertions(+)
diff --git a/dwl.c b/dwl.c
index 76ed8aa..26dff23 100644
--- a/dwl.c
+++ b/dwl.c
@@ -45,6 +45,7 @@
#include <wlr/types/wlr_session_lock_v1.h>
#include <wlr/types/wlr_single_pixel_buffer_v1.h>
#include <wlr/types/wlr_subcompositor.h>
+#include <wlr/types/wlr_touch.h>
#include <wlr/types/wlr_viewporter.h>
#include <wlr/types/wlr_virtual_keyboard_v1.h>
#include <wlr/types/wlr_virtual_pointer_v1.h>
@@ -255,6 +256,7 @@ static void createlocksurface(struct wl_listener *listener, void *data);
static void createmon(struct wl_listener *listener, void *data);
static void createnotify(struct wl_listener *listener, void *data);
static void createpointer(struct wlr_pointer *pointer);
+static void createtouch(struct wlr_touch *touch);
static void cursorframe(struct wl_listener *listener, void *data);
static void destroydecoration(struct wl_listener *listener, void *data);
static void destroydragicon(struct wl_listener *listener, void *data);
@@ -321,6 +323,8 @@ static void togglefloating(const Arg *arg);
static void togglefullscreen(const Arg *arg);
static void toggletag(const Arg *arg);
static void toggleview(const Arg *arg);
+static void touchdown(struct wl_listener *listener, void *data);
+static void touchup(struct wl_listener *listener, void *data);
static void unlocksession(struct wl_listener *listener, void *data);
static void unmaplayersurfacenotify(struct wl_listener *listener, void *data);
static void unmapnotify(struct wl_listener *listener, void *data);
@@ -1015,6 +1019,50 @@ createpointer(struct wlr_pointer *pointer)
wlr_cursor_attach_input_device(cursor, &pointer->base);
}
+void
+createtouch(struct wlr_touch *touch)
+{
+ if (wlr_input_device_is_libinput(&touch->base)) {
+ struct libinput_device *libinput_device = (struct libinput_device*)
+ wlr_libinput_get_device_handle(&touch->base);
+
+ if (libinput_device_config_tap_get_finger_count(libinput_device)) {
+ libinput_device_config_tap_set_enabled(libinput_device, tap_to_click);
+ libinput_device_config_tap_set_drag_enabled(libinput_device, tap_and_drag);
+ libinput_device_config_tap_set_drag_lock_enabled(libinput_device, drag_lock);
+ libinput_device_config_tap_set_button_map(libinput_device, button_map);
+ }
+
+ if (libinput_device_config_scroll_has_natural_scroll(libinput_device))
+ libinput_device_config_scroll_set_natural_scroll_enabled(libinput_device, natural_scrolling);
+
+ if (libinput_device_config_dwt_is_available(libinput_device))
+ libinput_device_config_dwt_set_enabled(libinput_device, disable_while_typing);
+
+ if (libinput_device_config_left_handed_is_available(libinput_device))
+ libinput_device_config_left_handed_set(libinput_device, left_handed);
+
+ if (libinput_device_config_middle_emulation_is_available(libinput_device))
+ libinput_device_config_middle_emulation_set_enabled(libinput_device, middle_button_emulation);
+
+ if (libinput_device_config_scroll_get_methods(libinput_device) != LIBINPUT_CONFIG_SCROLL_NO_SCROLL)
+ libinput_device_config_scroll_set_method (libinput_device, scroll_method);
+
+ if (libinput_device_config_click_get_methods(libinput_device) != LIBINPUT_CONFIG_CLICK_METHOD_NONE)
+ libinput_device_config_click_set_method (libinput_device, click_method);
+
+ if (libinput_device_config_send_events_get_modes(libinput_device))
+ libinput_device_config_send_events_set_mode(libinput_device, send_events_mode);
+
+ if (libinput_device_config_accel_is_available(libinput_device)) {
+ libinput_device_config_accel_set_profile(libinput_device, accel_profile);
+ libinput_device_config_accel_set_speed(libinput_device, accel_speed);
+ }
+ }
+
+ wlr_cursor_attach_input_device(cursor, &touch->base);
+}
+
void
cursorframe(struct wl_listener *listener, void *data)
{
@@ -1344,6 +1392,9 @@ inputdevice(struct wl_listener *listener, void *data)
case WLR_INPUT_DEVICE_POINTER:
createpointer(wlr_pointer_from_input_device(device));
break;
+ case WLR_INPUT_DEVICE_TOUCH:
+ createtouch(wlr_touch_from_input_device(device));
+ break;
default:
/* TODO handle other input device types */
break;
@@ -2320,6 +2371,10 @@ setup(void)
LISTEN_STATIC(&cursor->events.button, buttonpress);
LISTEN_STATIC(&cursor->events.axis, axisnotify);
LISTEN_STATIC(&cursor->events.frame, cursorframe);
+ LISTEN_STATIC(&cursor->events.touch_down, touchdown);
+ LISTEN_STATIC(&cursor->events.touch_frame, cursorframe);
+ LISTEN_STATIC(&cursor->events.touch_motion, motionabsolute);
+ LISTEN_STATIC(&cursor->events.touch_up, touchup);
cursor_shape_mgr = wlr_cursor_shape_manager_v1_create(dpy, 1);
LISTEN_STATIC(&cursor_shape_mgr->events.request_set_shape, setcursorshape);
@@ -2537,6 +2592,38 @@ toggleview(const Arg *arg)
printstatus();
}
+void
+touchdown(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_button_event *button_event = data;
+
+#ifdef POINTERCONSTRAINTS
+ struct wlr_pointer_motion_absolute_event *event = data;
+ double lx, ly, dx, dy;
+
+ wlr_cursor_absolute_to_layout_coords(cursor, &event->pointer->base, event->x, event->y, &lx, &ly);
+ wlr_cursor_warp_closest(cursor, &event->pointer->base, lx, ly);
+ dx = lx - cursor->x;
+ dy = ly - cursor->y;
+ motionnotify(event->time_msec, &event->pointer->base, dx, dy, dx, dy);
+#else
+ motionabsolute(listener, data);
+#endif
+
+ button_event->button=BTN_LEFT;
+ button_event->state=WLR_BUTTON_PRESSED;
+ buttonpress(listener, button_event);
+}
+
+void
+touchup(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_button_event *button_event = data;
+ button_event->button=BTN_LEFT;
+ button_event->state=WLR_BUTTON_RELEASED;
+ buttonpress(listener, button_event);
+}
+
void
unlocksession(struct wl_listener *listener, void *data)
{
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