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db11a37a68
Add support for click assist, namely simulated secondary click (on a long primary button press) and hover click support (simulate a click when the pointer remains static for some time). https://gitlab.gnome.org/GNOME/mutter/merge_requests/512
670 lines
19 KiB
C
670 lines
19 KiB
C
/*
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* Copyright (C) 2019 Red Hat
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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* 02111-1307, USA.
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*
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* Author: Olivier Fourdan <ofourdan@redhat.com>
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*
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* This reimplements in Clutter the same behavior as mousetweaks original
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* implementation by Gerd Kohlberger <gerdko gmail com>
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* mousetweaks Copyright (C) 2007-2010 Gerd Kohlberger <gerdko gmail com>
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*/
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#include "clutter-build-config.h"
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#include "clutter-device-manager.h"
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#include "clutter-device-manager-private.h"
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#include "clutter-enum-types.h"
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#include "clutter-input-device.h"
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#include "clutter-input-pointer-a11y-private.h"
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#include "clutter-main.h"
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#include "clutter-virtual-input-device.h"
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static gboolean
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is_secondary_click_enabled (ClutterInputDevice *device)
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{
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ClutterPointerA11ySettings settings;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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return (settings.controls & CLUTTER_A11Y_SECONDARY_CLICK_ENABLED);
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}
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static gboolean
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is_dwell_click_enabled (ClutterInputDevice *device)
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{
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ClutterPointerA11ySettings settings;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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return (settings.controls & CLUTTER_A11Y_DWELL_ENABLED);
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}
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static unsigned int
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get_secondary_click_delay (ClutterInputDevice *device)
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{
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ClutterPointerA11ySettings settings;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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return settings.secondary_click_delay;
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}
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static unsigned int
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get_dwell_delay (ClutterInputDevice *device)
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{
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ClutterPointerA11ySettings settings;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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return settings.dwell_delay;
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}
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static unsigned int
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get_dwell_threshold (ClutterInputDevice *device)
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{
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ClutterPointerA11ySettings settings;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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return settings.dwell_threshold;
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}
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static ClutterPointerA11yDwellMode
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get_dwell_mode (ClutterInputDevice *device)
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{
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ClutterPointerA11ySettings settings;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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return settings.dwell_mode;
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}
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static ClutterPointerA11yDwellClickType
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get_dwell_click_type (ClutterInputDevice *device)
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{
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ClutterPointerA11ySettings settings;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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#
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return settings.dwell_click_type;
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}
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static ClutterPointerA11yDwellClickType
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get_dwell_click_type_for_direction (ClutterInputDevice *device,
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ClutterPointerA11yDwellDirection direction)
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{
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ClutterPointerA11ySettings settings;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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if (direction == settings.dwell_gesture_single)
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return CLUTTER_A11Y_DWELL_CLICK_TYPE_PRIMARY;
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else if (direction == settings.dwell_gesture_double)
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return CLUTTER_A11Y_DWELL_CLICK_TYPE_DOUBLE;
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else if (direction == settings.dwell_gesture_drag)
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return CLUTTER_A11Y_DWELL_CLICK_TYPE_DRAG;
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else if (direction == settings.dwell_gesture_secondary)
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return CLUTTER_A11Y_DWELL_CLICK_TYPE_SECONDARY;
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return CLUTTER_A11Y_DWELL_CLICK_TYPE_NONE;
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}
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static void
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emit_button_press (ClutterInputDevice *device,
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gint button)
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{
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clutter_virtual_input_device_notify_button (device->accessibility_virtual_device,
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g_get_monotonic_time (),
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button,
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CLUTTER_BUTTON_STATE_PRESSED);
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}
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static void
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emit_button_release (ClutterInputDevice *device,
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gint button)
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{
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clutter_virtual_input_device_notify_button (device->accessibility_virtual_device,
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g_get_monotonic_time (),
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button,
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CLUTTER_BUTTON_STATE_RELEASED);
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}
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static void
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emit_button_click (ClutterInputDevice *device,
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gint button)
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{
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emit_button_press (device, button);
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emit_button_release (device, button);
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}
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static void
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restore_dwell_position (ClutterInputDevice *device)
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{
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clutter_virtual_input_device_notify_absolute_motion (device->accessibility_virtual_device,
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g_get_monotonic_time (),
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device->ptr_a11y_data->dwell_x,
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device->ptr_a11y_data->dwell_y);
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}
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static gboolean
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trigger_secondary_click (gpointer data)
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{
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ClutterInputDevice *device = data;
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device->ptr_a11y_data->secondary_click_triggered = TRUE;
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device->ptr_a11y_data->secondary_click_timer = 0;
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g_signal_emit_by_name (device->device_manager,
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"ptr-a11y-timeout-stopped",
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device,
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CLUTTER_A11Y_TIMEOUT_TYPE_SECONDARY_CLICK);
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return G_SOURCE_REMOVE;
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}
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static void
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start_secondary_click_timeout (ClutterInputDevice *device)
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{
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unsigned int delay = get_secondary_click_delay (device);
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device->ptr_a11y_data->secondary_click_timer =
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clutter_threads_add_timeout (delay, trigger_secondary_click, device);
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g_signal_emit_by_name (device->device_manager,
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"ptr-a11y-timeout-started",
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device,
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CLUTTER_A11Y_TIMEOUT_TYPE_SECONDARY_CLICK,
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delay);
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}
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static void
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stop_secondary_click_timeout (ClutterInputDevice *device)
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{
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if (device->ptr_a11y_data->secondary_click_timer)
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{
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g_source_remove (device->ptr_a11y_data->secondary_click_timer);
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device->ptr_a11y_data->secondary_click_timer = 0;
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g_signal_emit_by_name (device->device_manager,
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"ptr-a11y-timeout-stopped",
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device,
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CLUTTER_A11Y_TIMEOUT_TYPE_SECONDARY_CLICK);
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}
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device->ptr_a11y_data->secondary_click_triggered = FALSE;
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}
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static gboolean
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pointer_has_moved (ClutterInputDevice *device)
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{
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float dx, dy;
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gint threshold;
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dx = device->ptr_a11y_data->dwell_x - device->ptr_a11y_data->current_x;
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dy = device->ptr_a11y_data->dwell_y - device->ptr_a11y_data->current_y;
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threshold = get_dwell_threshold (device);
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/* Pythagorean theorem */
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return ((dx * dx) + (dy * dy)) > (threshold * threshold);
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}
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static gboolean
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is_secondary_click_pending (ClutterInputDevice *device)
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{
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return device->ptr_a11y_data->secondary_click_timer != 0;
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}
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static gboolean
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is_secondary_click_triggered (ClutterInputDevice *device)
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{
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return device->ptr_a11y_data->secondary_click_triggered;
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}
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static gboolean
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is_dwell_click_pending (ClutterInputDevice *device)
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{
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return device->ptr_a11y_data->dwell_timer != 0;
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}
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static gboolean
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is_dwell_dragging (ClutterInputDevice *device)
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{
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return device->ptr_a11y_data->dwell_drag_started;
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}
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static gboolean
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is_dwell_gesturing (ClutterInputDevice *device)
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{
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return device->ptr_a11y_data->dwell_gesture_started;
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}
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static gboolean
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has_button_pressed (ClutterInputDevice *device)
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{
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return device->ptr_a11y_data->n_btn_pressed > 0;
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}
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static gboolean
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should_start_secondary_click_timeout (ClutterInputDevice *device)
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{
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return !is_dwell_dragging (device);
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}
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static gboolean
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should_start_dwell (ClutterInputDevice *device)
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{
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/* We should trigger a dwell if we've not already started one, and if
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* no button is currently pressed or we are in the middle of a dwell
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* drag action.
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*/
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return !is_dwell_click_pending (device) &&
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(is_dwell_dragging (device) ||
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!has_button_pressed (device));
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}
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static gboolean
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should_stop_dwell (ClutterInputDevice *device)
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{
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/* We should stop a dwell if the motion exceeds the threshold, unless
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* we've started a gesture, because we want to keep the original dwell
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* location to both detect a gesture and restore the original pointer
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* location once the gesture is finished.
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*/
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return pointer_has_moved (device) &&
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!is_dwell_gesturing (device);
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}
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static gboolean
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should_update_dwell_position (ClutterInputDevice *device)
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{
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return !is_dwell_gesturing (device) &&
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!is_dwell_click_pending (device) &&
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!is_secondary_click_pending (device);
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}
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static void
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update_dwell_click_type (ClutterInputDevice *device)
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{
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ClutterPointerA11ySettings settings;
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ClutterPointerA11yDwellClickType dwell_click_type;
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clutter_device_manager_get_pointer_a11y_settings (device->device_manager, &settings);
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dwell_click_type = settings.dwell_click_type;
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switch (dwell_click_type)
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{
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_DOUBLE:
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_SECONDARY:
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_MIDDLE:
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dwell_click_type = CLUTTER_A11Y_DWELL_CLICK_TYPE_PRIMARY;
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break;
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_DRAG:
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if (!is_dwell_dragging (device))
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dwell_click_type = CLUTTER_A11Y_DWELL_CLICK_TYPE_PRIMARY;
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break;
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_PRIMARY:
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_NONE:
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default:
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break;
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}
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if (dwell_click_type != settings.dwell_click_type)
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{
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settings.dwell_click_type = dwell_click_type;
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clutter_device_manager_set_pointer_a11y_settings (device->device_manager,
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&settings);
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g_signal_emit_by_name (device->device_manager,
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"ptr-a11y-dwell-click-type-changed",
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dwell_click_type);
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}
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}
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static void
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emit_dwell_click (ClutterInputDevice *device,
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ClutterPointerA11yDwellClickType dwell_click_type)
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{
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switch (dwell_click_type)
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{
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_PRIMARY:
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emit_button_click (device, CLUTTER_BUTTON_PRIMARY);
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break;
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_DOUBLE:
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emit_button_click (device, CLUTTER_BUTTON_PRIMARY);
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emit_button_click (device, CLUTTER_BUTTON_PRIMARY);
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break;
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_DRAG:
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if (is_dwell_dragging (device))
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{
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emit_button_release (device, CLUTTER_BUTTON_PRIMARY);
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device->ptr_a11y_data->dwell_drag_started = FALSE;
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}
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else
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{
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emit_button_press (device, CLUTTER_BUTTON_PRIMARY);
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device->ptr_a11y_data->dwell_drag_started = TRUE;
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}
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break;
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_SECONDARY:
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emit_button_click (device, CLUTTER_BUTTON_SECONDARY);
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break;
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_MIDDLE:
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emit_button_click (device, CLUTTER_BUTTON_MIDDLE);
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break;
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case CLUTTER_A11Y_DWELL_CLICK_TYPE_NONE:
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default:
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break;
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}
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}
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static ClutterPointerA11yDwellDirection
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get_dwell_direction (ClutterInputDevice *device)
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{
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float dx, dy;
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dx = ABS (device->ptr_a11y_data->dwell_x - device->ptr_a11y_data->current_x);
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dy = ABS (device->ptr_a11y_data->dwell_y - device->ptr_a11y_data->current_y);
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/* The pointer hasn't moved */
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if (!pointer_has_moved (device))
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return CLUTTER_A11Y_DWELL_DIRECTION_NONE;
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if (device->ptr_a11y_data->dwell_x < device->ptr_a11y_data->current_x)
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{
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if (dx > dy)
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return CLUTTER_A11Y_DWELL_DIRECTION_LEFT;
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}
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else
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{
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if (dx > dy)
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return CLUTTER_A11Y_DWELL_DIRECTION_RIGHT;
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}
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if (device->ptr_a11y_data->dwell_y < device->ptr_a11y_data->current_y)
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return CLUTTER_A11Y_DWELL_DIRECTION_UP;
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return CLUTTER_A11Y_DWELL_DIRECTION_DOWN;
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}
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static gboolean
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trigger_clear_dwell_gesture (gpointer data)
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{
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ClutterInputDevice *device = data;
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device->ptr_a11y_data->dwell_timer = 0;
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device->ptr_a11y_data->dwell_gesture_started = FALSE;
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return G_SOURCE_REMOVE;
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}
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static gboolean
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trigger_dwell_gesture (gpointer data)
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{
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ClutterInputDevice *device = data;
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ClutterPointerA11yDwellDirection direction;
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unsigned int delay = get_dwell_delay (device);
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restore_dwell_position (device);
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direction = get_dwell_direction (device);
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emit_dwell_click (device,
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get_dwell_click_type_for_direction (device,
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direction));
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/* Do not clear the gesture right away, otherwise we'll start another one */
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device->ptr_a11y_data->dwell_timer =
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clutter_threads_add_timeout (delay, trigger_clear_dwell_gesture, device);
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g_signal_emit_by_name (device->device_manager,
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"ptr-a11y-timeout-stopped",
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device,
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CLUTTER_A11Y_TIMEOUT_TYPE_GESTURE);
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return G_SOURCE_REMOVE;
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}
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static void
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start_dwell_gesture_timeout (ClutterInputDevice *device)
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{
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unsigned int delay = get_dwell_delay (device);
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device->ptr_a11y_data->dwell_timer =
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clutter_threads_add_timeout (delay, trigger_dwell_gesture, device);
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device->ptr_a11y_data->dwell_gesture_started = TRUE;
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g_signal_emit_by_name (device->device_manager,
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"ptr-a11y-timeout-started",
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device,
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CLUTTER_A11Y_TIMEOUT_TYPE_GESTURE,
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delay);
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}
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static gboolean
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trigger_dwell_click (gpointer data)
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{
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ClutterInputDevice *device = data;
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device->ptr_a11y_data->dwell_timer = 0;
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g_signal_emit_by_name (device->device_manager,
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"ptr-a11y-timeout-stopped",
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device,
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CLUTTER_A11Y_TIMEOUT_TYPE_DWELL);
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if (get_dwell_mode (device) == CLUTTER_A11Y_DWELL_MODE_GESTURE)
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{
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if (is_dwell_dragging (device))
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emit_dwell_click (device, CLUTTER_A11Y_DWELL_CLICK_TYPE_DRAG);
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else
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start_dwell_gesture_timeout (device);
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}
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else
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{
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emit_dwell_click (device, get_dwell_click_type (device));
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update_dwell_click_type (device);
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}
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return G_SOURCE_REMOVE;
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}
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static void
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start_dwell_timeout (ClutterInputDevice *device)
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{
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unsigned int delay = get_dwell_delay (device);
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device->ptr_a11y_data->dwell_timer =
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clutter_threads_add_timeout (delay, trigger_dwell_click, device);
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g_signal_emit_by_name (device->device_manager,
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"ptr-a11y-timeout-started",
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device,
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CLUTTER_A11Y_TIMEOUT_TYPE_DWELL,
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delay);
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}
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static void
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stop_dwell_timeout (ClutterInputDevice *device)
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{
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if (device->ptr_a11y_data->dwell_timer)
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{
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g_source_remove (device->ptr_a11y_data->dwell_timer);
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device->ptr_a11y_data->dwell_timer = 0;
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device->ptr_a11y_data->dwell_gesture_started = FALSE;
|
|
|
|
g_signal_emit_by_name (device->device_manager,
|
|
"ptr-a11y-timeout-stopped",
|
|
device,
|
|
CLUTTER_A11Y_TIMEOUT_TYPE_DWELL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
update_dwell_position (ClutterInputDevice *device)
|
|
{
|
|
device->ptr_a11y_data->dwell_x = device->ptr_a11y_data->current_x;
|
|
device->ptr_a11y_data->dwell_y = device->ptr_a11y_data->current_y;
|
|
}
|
|
|
|
static void
|
|
update_current_position (ClutterInputDevice *device,
|
|
float x,
|
|
float y)
|
|
{
|
|
device->ptr_a11y_data->current_x = x;
|
|
device->ptr_a11y_data->current_y = y;
|
|
}
|
|
|
|
static gboolean
|
|
is_device_core_pointer (ClutterInputDevice *device)
|
|
{
|
|
ClutterInputDevice *core_pointer;
|
|
|
|
core_pointer = clutter_device_manager_get_core_device (device->device_manager,
|
|
CLUTTER_POINTER_DEVICE);
|
|
if (core_pointer == NULL)
|
|
return FALSE;
|
|
|
|
return (core_pointer == device);
|
|
}
|
|
|
|
void
|
|
_clutter_input_pointer_a11y_add_device (ClutterInputDevice *device)
|
|
{
|
|
if (!is_device_core_pointer (device))
|
|
return;
|
|
|
|
device->accessibility_virtual_device =
|
|
clutter_device_manager_create_virtual_device (device->device_manager,
|
|
CLUTTER_POINTER_DEVICE);
|
|
|
|
device->ptr_a11y_data = g_new0 (ClutterPtrA11yData, 1);
|
|
}
|
|
|
|
void
|
|
_clutter_input_pointer_a11y_remove_device (ClutterInputDevice *device)
|
|
{
|
|
if (!is_device_core_pointer (device))
|
|
return;
|
|
|
|
/* Terminate a drag if started */
|
|
if (is_dwell_dragging (device))
|
|
emit_dwell_click (device, CLUTTER_A11Y_DWELL_CLICK_TYPE_DRAG);
|
|
|
|
stop_dwell_timeout (device);
|
|
stop_secondary_click_timeout (device);
|
|
|
|
g_clear_pointer (&device->ptr_a11y_data, g_free);
|
|
}
|
|
|
|
void
|
|
_clutter_input_pointer_a11y_on_motion_event (ClutterInputDevice *device,
|
|
float x,
|
|
float y)
|
|
{
|
|
if (!is_device_core_pointer (device))
|
|
return;
|
|
|
|
if (!_clutter_is_input_pointer_a11y_enabled (device))
|
|
return;
|
|
|
|
update_current_position (device, x, y);
|
|
|
|
if (is_secondary_click_enabled (device))
|
|
{
|
|
if (pointer_has_moved (device))
|
|
stop_secondary_click_timeout (device);
|
|
}
|
|
|
|
if (is_dwell_click_enabled (device))
|
|
{
|
|
if (should_stop_dwell (device))
|
|
stop_dwell_timeout (device);
|
|
else if (should_start_dwell (device))
|
|
start_dwell_timeout (device);
|
|
}
|
|
|
|
if (should_update_dwell_position (device))
|
|
update_dwell_position (device);
|
|
}
|
|
|
|
void
|
|
_clutter_input_pointer_a11y_on_button_event (ClutterInputDevice *device,
|
|
int button,
|
|
gboolean pressed)
|
|
{
|
|
if (!is_device_core_pointer (device))
|
|
return;
|
|
|
|
if (!_clutter_is_input_pointer_a11y_enabled (device))
|
|
return;
|
|
|
|
if (pressed)
|
|
{
|
|
device->ptr_a11y_data->n_btn_pressed++;
|
|
|
|
if (is_dwell_click_enabled (device))
|
|
stop_dwell_timeout (device);
|
|
|
|
if (is_dwell_dragging (device))
|
|
stop_dwell_timeout (device);
|
|
|
|
if (is_secondary_click_enabled (device))
|
|
{
|
|
if (button == CLUTTER_BUTTON_PRIMARY)
|
|
{
|
|
if (should_start_secondary_click_timeout (device))
|
|
start_secondary_click_timeout (device);
|
|
}
|
|
else if (is_secondary_click_pending (device))
|
|
{
|
|
stop_secondary_click_timeout (device);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (has_button_pressed (device))
|
|
device->ptr_a11y_data->n_btn_pressed--;
|
|
|
|
if (is_secondary_click_triggered (device))
|
|
{
|
|
emit_button_click (device, CLUTTER_BUTTON_SECONDARY);
|
|
stop_secondary_click_timeout (device);
|
|
}
|
|
|
|
if (is_secondary_click_pending (device))
|
|
stop_secondary_click_timeout (device);
|
|
|
|
if (is_dwell_dragging (device))
|
|
emit_dwell_click (device, CLUTTER_A11Y_DWELL_CLICK_TYPE_DRAG);
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
_clutter_is_input_pointer_a11y_enabled (ClutterInputDevice *device)
|
|
{
|
|
g_return_val_if_fail (CLUTTER_IS_INPUT_DEVICE (device), FALSE);
|
|
|
|
return (is_secondary_click_enabled (device) || is_dwell_click_enabled (device));
|
|
}
|