Add per-tool settings and gesture customization
This commit is contained in:
ajp_anton
@@ -1,18 +1,23 @@
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-- SPDX-License-Identifier: MIT
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--
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-- Recognize one touchpad contact that has paused before a quick second-finger
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-- tap. Hide the tapping contact from libinput and emit a middle click instead.
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-- Recognize one established touchpad contact followed by a quick second-finger
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-- tap. Hide the tapping contact from libinput and emit a configured action.
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libinput:register({1})
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local MINIMUM_STATIONARY_US = 100 * 1000
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local MAXIMUM_TAP_US = 150 * 1000
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local settings = TOUCHPAD_HOLD_TAP_SETTINGS or {}
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local MINIMUM_ANCHOR_AGE_US = (settings.minimum_anchor_age_ms or 100) * 1000
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local MINIMUM_STATIONARY_US = (settings.minimum_pause_ms or 100) * 1000
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local MINIMUM_TAP_US = (settings.minimum_tap_ms or 10) * 1000
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local MAXIMUM_TAP_US = (settings.maximum_tap_ms or 150) * 1000
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local MAXIMUM_ANCHOR_MOVEMENT_MM = 1.5
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local MAXIMUM_TAPPER_MOVEMENT_MM = 1.0
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local OUTPUT_EVENT_NAME = settings.output_event or "BTN_MIDDLE"
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local OUTPUT_USAGE = evdev[OUTPUT_EVENT_NAME]
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local states = {}
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local button_devices = {}
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local button_device = nil
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local output_devices = {}
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local output_device = nil
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local tool_usages = {
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{ usage = evdev.BTN_TOOL_FINGER, count = 1 },
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@@ -131,18 +136,19 @@ local function restore_candidate(device, state, reason)
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"touchpad-hold-tap: restored candidate (" .. reason .. ")")
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end
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local function emit_middle_click()
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if not button_device then
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local function emit_action()
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if not output_device then
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libinput:log_error(
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"touchpad-hold-tap: no pointer device available for button output")
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"touchpad-hold-tap: no device available for " ..
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OUTPUT_EVENT_NAME .. " output")
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return false
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end
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button_device:append_frame({
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{ usage = evdev.BTN_MIDDLE, value = 1 },
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output_device:append_frame({
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{ usage = OUTPUT_USAGE, value = 1 },
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})
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button_device:append_frame({
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{ usage = evdev.BTN_MIDDLE, value = 0 },
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output_device:append_frame({
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{ usage = OUTPUT_USAGE, value = 0 },
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})
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return true
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end
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@@ -185,8 +191,14 @@ local function handle_tracking_begin(device, state, tracking_id, timestamp)
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state.anchor_slot = contact.slot
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elseif state.mode == "anchor" and previous_count == 1 then
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local anchor = state.contacts[state.anchor_slot]
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if anchor and anchor.rest_x and anchor.rest_y and
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timestamp - anchor.stationary_since >= MINIMUM_STATIONARY_US then
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local old_enough = anchor and
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timestamp - anchor.down_time >=
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MINIMUM_ANCHOR_AGE_US
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local stationary = MINIMUM_STATIONARY_US == 0 or
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(anchor and anchor.rest_x and anchor.rest_y and
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timestamp - anchor.stationary_since >=
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MINIMUM_STATIONARY_US)
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if old_enough and stationary then
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contact.hidden = true
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state.mode = "candidate"
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state.candidate_slot = contact.slot
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@@ -211,7 +223,9 @@ local function handle_tracking_end(device, state, timestamp)
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if contact.hidden and state.source_slot == state.candidate_slot then
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local anchor = state.contacts[state.anchor_slot]
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local duration = timestamp - contact.down_time
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local accepted = anchor and duration <= MAXIMUM_TAP_US
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local accepted = anchor and
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duration >= MINIMUM_TAP_US and
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duration <= MAXIMUM_TAP_US
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state.contacts[state.source_slot] = nil
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state.candidate_slot = nil
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@@ -224,11 +238,12 @@ local function handle_tracking_end(device, state, timestamp)
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end
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if accepted then
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if emit_middle_click() then
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libinput:log_debug("touchpad-hold-tap: middle click")
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if emit_action() then
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libinput:log_debug(
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"touchpad-hold-tap: emitted " .. OUTPUT_EVENT_NAME)
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end
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else
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libinput:log_debug("touchpad-hold-tap: ignored long tap")
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libinput:log_debug("touchpad-hold-tap: ignored tap duration")
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end
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return false, true
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end
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@@ -243,6 +258,12 @@ local function handle_tracking_end(device, state, timestamp)
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if contact_count(state, false) > 0 then
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state.mode = "passthrough"
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end
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elseif state.mode == "passthrough" and state.anchor_slot and
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state.contacts[state.anchor_slot] and
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contact_count(state, false) == 1 then
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-- A rejected second contact must not poison the original anchor.
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-- It can become eligible again without first being lifted.
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state.mode = "anchor"
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end
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reset_if_clear(state)
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return true, false
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@@ -272,7 +293,7 @@ local function handle_mt_axis(device, state, event, timestamp)
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remember_axis(contact, event.usage, event.value)
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if contact.slot == state.anchor_slot then
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if state.mode == "candidate" and
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if state.mode == "candidate" and MINIMUM_STATIONARY_US > 0 and
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movement_exceeded_from(
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state, contact, state.candidate_anchor_x,
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state.candidate_anchor_y, MAXIMUM_ANCHOR_MOVEMENT_MM) then
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@@ -373,31 +394,45 @@ end
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local function device_removed(device)
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states[device] = nil
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button_devices[device] = nil
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if button_device == device then
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button_device = nil
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for candidate in pairs(button_devices) do
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button_device = candidate
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output_devices[device] = nil
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if output_device == device then
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output_device = nil
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for candidate in pairs(output_devices) do
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output_device = candidate
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break
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end
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end
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end
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local function can_emit_output(properties, usages)
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if OUTPUT_EVENT_NAME:sub(1, 4) == "BTN_" then
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return (properties.ID_INPUT_MOUSE or
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properties.ID_INPUT_POINTINGSTICK) and
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not properties.ID_INPUT_TOUCHPAD and
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usages[evdev.REL_X] and usages[evdev.REL_Y]
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end
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return properties.ID_INPUT_KEYBOARD
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end
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local function device_new(device)
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if not OUTPUT_USAGE then
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libinput:log_error(
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"touchpad-hold-tap: unknown output event " .. OUTPUT_EVENT_NAME)
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return
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end
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local properties = device:udev_properties()
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local usages = device:usages()
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-- Clickpads intentionally ignore BTN_MIDDLE from their own event node.
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-- Route synthesized buttons through an existing pointer device instead.
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if (properties.ID_INPUT_MOUSE or properties.ID_INPUT_POINTINGSTICK) and
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not properties.ID_INPUT_TOUCHPAD and
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usages[evdev.REL_X] and usages[evdev.REL_Y] then
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if not usages[evdev.BTN_MIDDLE] then
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device:enable_evdev_usage(evdev.BTN_MIDDLE)
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-- Clickpads ignore synthesized buttons on their own event node. Keyboard
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-- events likewise belong on a keyboard, so use a suitable existing device.
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if can_emit_output(properties, usages) then
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if not usages[OUTPUT_USAGE] then
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device:enable_evdev_usage(OUTPUT_USAGE)
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end
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button_devices[device] = true
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if not button_device then
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button_device = device
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output_devices[device] = true
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if not output_device then
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output_device = device
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end
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device:connect("device-removed", device_removed)
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end
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