From 10b63b27ba84458884138cecc1b914b4f69bc9b9 Mon Sep 17 00:00:00 2001

From: Carlos Garnacho <carlosg@gnome.org>

Date: Thu, 19 Jan 2017 15:03:41 +0100

Subject: [PATCH] backends/x11: Support synaptics configuration

The code is taken mostly as-is from g-s-d, so we can drag the

dead horse a bit longer.

---

 src/backends/x11/meta-input-settings-x11.c | 264 +++++++++++++++++++++++++++++

 1 file changed, 264 insertions(+)

diff --git a/src/backends/x11/meta-input-settings-x11.c b/src/backends/x11/meta-input-settings-x11.c

index 8f962b4..75ceb0c 100644

--- a/src/backends/x11/meta-input-settings-x11.c

+++ b/src/backends/x11/meta-input-settings-x11.c

@@ -26,6 +26,7 @@

 #include "meta-backend-x11.h"

 #include "meta-input-settings-x11.h"

+#include <stdlib.h>

 #include <string.h>

 #include <gdk/gdkx.h>

 #include <X11/Xatom.h>

@@ -118,6 +119,177 @@ change_property (ClutterInputDevice *device,

   meta_XFree (data_ret);

 }

+static gboolean

+is_device_synaptics (ClutterInputDevice *device)

+{

+  guchar *has_setting;

+

+  /* We just need looking for a synaptics-specific property */

+  has_setting = get_property (device, "Synaptics Off", XA_INTEGER, 8, 1);

+  if (!has_setting)

+    return FALSE;

+

+  meta_XFree (has_setting);

+  return TRUE;

+}

+

+static void

+change_synaptics_tap_left_handed (ClutterInputDevice *device,

+                                  gboolean            tap_enabled,

+                                  gboolean            left_handed)

+{

+  MetaDisplay *display = meta_get_display ();

+  MetaBackend *backend = meta_get_backend ();

+  Display *xdisplay = meta_backend_x11_get_xdisplay (META_BACKEND_X11 (backend));

+  XDevice *xdevice;

+  guchar *tap_action, *buttons;

+  guint buttons_capacity = 16, n_buttons;

+

+  xdevice = XOpenDevice(xdisplay, clutter_input_device_get_device_id (device));

+  if (!xdevice)

+    return;

+

+  tap_action = get_property (device, "Synaptics Tap Action",

+                             XA_INTEGER, 8, 7);

+  if (!tap_action)

+    goto out;

+

+  tap_action[4] = tap_enabled ? (left_handed ? 3 : 1) : 0;

+  tap_action[5] = tap_enabled ? (left_handed ? 1 : 3) : 0;

+  tap_action[6] = tap_enabled ? 2 : 0;

+

+  change_property (device, "Synaptics Tap Action",

+                   XA_INTEGER, 8, tap_action, 7);

+  meta_XFree (tap_action);

+

+  if (display)

+    meta_error_trap_push (display);

+  buttons = g_new (guchar, buttons_capacity);

+  n_buttons = XGetDeviceButtonMapping (xdisplay, xdevice,

+                                       buttons, buttons_capacity);

+

+  while (n_buttons > buttons_capacity)

+    {

+      buttons_capacity = n_buttons;

+      buttons = (guchar *) g_realloc (buttons,

+                                      buttons_capacity * sizeof (guchar));

+

+      n_buttons = XGetDeviceButtonMapping (xdisplay, xdevice,

+                                           buttons, buttons_capacity);

+    }

+

+  buttons[0] = left_handed ? 3 : 1;

+  buttons[2] = left_handed ? 1 : 3;

+  XSetDeviceButtonMapping (xdisplay, xdevice, buttons, n_buttons);

+

+  if (display && meta_error_trap_pop_with_return (display))

+    {

+      g_warning ("Could not set synaptics touchpad left-handed for %s",

+                 clutter_input_device_get_device_name (device));

+    }

+

+ out:

+  XCloseDevice (xdisplay, xdevice);

+}

+

+static void

+change_synaptics_speed (ClutterInputDevice *device,

+                        gdouble             speed)

+{

+  MetaDisplay *display = meta_get_display ();

+  MetaBackend *backend = meta_get_backend ();

+  Display *xdisplay = meta_backend_x11_get_xdisplay (META_BACKEND_X11 (backend));

+  XDevice *xdevice;

+  XPtrFeedbackControl feedback;

+  XFeedbackState *states, *state;

+  int i, num_feedbacks, motion_threshold, numerator, denominator;

+  gfloat motion_acceleration;

+

+  xdevice = XOpenDevice(xdisplay, clutter_input_device_get_device_id (device));

+  if (!xdevice)

+    return;

+  /* Get the list of feedbacks for the device */

+  states = XGetFeedbackControl (xdisplay, xdevice, &num_feedbacks);

+  if (!states)

+    return;

+

+  /* Calculate acceleration and threshold */

+  motion_acceleration = (speed + 1) * 5; /* speed is [-1..1], map to [0..10] */

+  motion_threshold = CLAMP (10 - floor (motion_acceleration), 1, 10);

+

+  if (motion_acceleration >= 1.0)

+    {

+      /* we want to get the acceleration, with a resolution of 0.5

+       */

+      if ((motion_acceleration - floor (motion_acceleration)) < 0.25)

+        {

+          numerator = floor (motion_acceleration);

+          denominator = 1;

+        }

+      else if ((motion_acceleration - floor (motion_acceleration)) < 0.5)

+        {

+          numerator = ceil (2.0 * motion_acceleration);

+          denominator = 2;

+        }

+      else if ((motion_acceleration - floor (motion_acceleration)) < 0.75)

+        {

+          numerator = floor (2.0 *motion_acceleration);

+          denominator = 2;

+        }

+      else

+        {

+          numerator = ceil (motion_acceleration);

+          denominator = 1;

+        }

+    }

+  else if (motion_acceleration < 1.0 && motion_acceleration > 0)

+    {

+      /* This we do to 1/10ths */

+      numerator = floor (motion_acceleration * 10) + 1;

+      denominator= 10;

+    }

+  else

+    {

+      numerator = -1;

+      denominator = -1;

+    }

+

+  if (display)

+    meta_error_trap_push (display);

+

+  state = (XFeedbackState *) states;

+

+  for (i = 0; i < num_feedbacks; i++)

+    {

+      if (state->class == PtrFeedbackClass)

+        {

+          /* And tell the device */

+          feedback.class      = PtrFeedbackClass;

+          feedback.length     = sizeof (XPtrFeedbackControl);

+          feedback.id         = state->id;

+          feedback.threshold  = motion_threshold;

+          feedback.accelNum   = numerator;

+          feedback.accelDenom = denominator;

+

+          XChangeFeedbackControl (xdisplay, xdevice,

+                                  DvAccelNum | DvAccelDenom | DvThreshold,

+                                  (XFeedbackControl *) &feedback);

+          break;

+        }

+

+      state = (XFeedbackState *) ((char *) state + state->length);

+    }

+

+  if (display && meta_error_trap_pop_with_return (display))

+    {

+      g_warning ("Could not set synaptics touchpad acceleration for %s",

+                 clutter_input_device_get_device_name (device));

+    }

+

+  XFreeFeedbackList (states);

+  XCloseDevice (xdisplay, xdevice);

+}

+

 static void

 meta_input_settings_x11_set_send_events (MetaInputSettings        *settings,

                                          ClutterInputDevice       *device,

@@ -126,6 +298,13 @@ meta_input_settings_x11_set_send_events (MetaInputSettings        *settings,

   guchar values[2] = { 0 }; /* disabled, disabled-on-external-mouse */

   guchar *available;

+  if (is_device_synaptics (device))

+    {

+      values[0] = mode != G_DESKTOP_DEVICE_SEND_EVENTS_ENABLED;

+      change_property (device, "Synaptics Off", XA_INTEGER, 8, &values, 1);

+      return;

+    }

+

   available = get_property (device, "libinput Send Events Modes Available",

                             XA_INTEGER, 8, 2);

   if (!available)

@@ -178,6 +357,12 @@ meta_input_settings_x11_set_speed (MetaInputSettings  *settings,

   Display *xdisplay = meta_backend_x11_get_xdisplay (META_BACKEND_X11 (backend));

   gfloat value = speed;

+  if (is_device_synaptics (device))

+    {

+      change_synaptics_speed (device, speed);

+      return;

+    }

+

   change_property (device, "libinput Accel Speed",

                    XInternAtom (xdisplay, "FLOAT", False),

                    32, &value, 1);

@@ -190,6 +375,18 @@ meta_input_settings_x11_set_left_handed (MetaInputSettings  *settings,

 {

   guchar value = (enabled) ? 1 : 0;

+  if (is_device_synaptics (device))

+    {

+      GSettings *settings;

+

+      settings = g_settings_new ("org.gnome.desktop.peripherals.touchpad");

+      change_synaptics_tap_left_handed (device,

+                                        g_settings_get_boolean (settings, "tap-to-click"),

+                                        enabled);

+      g_object_unref (settings);

+      return;

+    }

+

   change_property (device, "libinput Left Handed Enabled",

                    XA_INTEGER, 8, &value, 1);

 }

@@ -201,6 +398,20 @@ meta_input_settings_x11_set_tap_enabled (MetaInputSettings  *settings,

 {

   guchar value = (enabled) ? 1 : 0;

+  if (is_device_synaptics (device))

+    {

+      GDesktopTouchpadHandedness handedness;

+      GSettings *settings;

+

+      settings = g_settings_new ("org.gnome.desktop.peripherals.touchpad");

+      handedness = g_settings_get_enum (settings, "left-handed");

+      g_object_unref (settings);

+

+      change_synaptics_tap_left_handed (device, enabled,

+                                        handedness == G_DESKTOP_TOUCHPAD_HANDEDNESS_LEFT);

+      return;

+    }

+

   change_property (device, "libinput Tapping Enabled",

                    XA_INTEGER, 8, &value, 1);

 }

@@ -212,6 +423,27 @@ meta_input_settings_x11_set_invert_scroll (MetaInputSettings  *settings,

 {

   guchar value = (inverted) ? 1 : 0;

+  if (is_device_synaptics (device))

+    {

+      gint32 *scrolling_distance;

+

+      scrolling_distance = get_property (device, "Synaptics Scrolling Distance",

+                                         XA_INTEGER, 32, 2);

+      if (scrolling_distance)

+        {

+          scrolling_distance[0] = inverted ?

+            -abs (scrolling_distance[0]) : abs (scrolling_distance[0]);

+          scrolling_distance[1] = inverted ?

+            -abs (scrolling_distance[1]) : abs (scrolling_distance[1]);

+

+          change_property (device, "Synaptics Scrolling Distance",

+                           XA_INTEGER, 32, scrolling_distance, 2);

+          meta_XFree (scrolling_distance);

+        }

+

+      return;

+    }

+

   change_property (device, "libinput Natural Scrolling Enabled",

                    XA_INTEGER, 8, &value, 1);

 }

@@ -225,6 +457,22 @@ meta_input_settings_x11_set_edge_scroll (MetaInputSettings            *settings,

   guchar *current = NULL;

   guchar *available = NULL;

+  if (is_device_synaptics (device))

+    {

+      current = get_property (device, "Synaptics Edge Scrolling",

+                              XA_INTEGER, 8, 3);

+      if (current)

+        {

+          current[0] = !!edge_scroll_enabled;

+          current[1] = !!edge_scroll_enabled;

+          change_property (device, "Synaptics Edge Scrolling",

+                           XA_INTEGER, 8, current, 3);

+          meta_XFree (current);

+        }

+

+      return;

+    }

+

   available = get_property (device, "libinput Scroll Methods Available",

                             XA_INTEGER, 8, SCROLL_METHOD_NUM_FIELDS);

   if (!available || !available[SCROLL_METHOD_FIELD_EDGE])

@@ -254,6 +502,22 @@ meta_input_settings_x11_set_two_finger_scroll (MetaInputSettings            *set

   guchar *current = NULL;

   guchar *available = NULL;

+  if (is_device_synaptics (device))

+    {

+      current = get_property (device, "Synaptics Two-Finger Scrolling",

+                              XA_INTEGER, 8, 2);

+      if (current)

+        {

+          current[0] = !!two_finger_scroll_enabled;

+          current[1] = !!two_finger_scroll_enabled;

+          change_property (device, "Synaptics Two-Finger Scrolling",

+                           XA_INTEGER, 8, current, 2);

+          meta_XFree (current);

+        }

+

+      return;

+    }

+

   available = get_property (device, "libinput Scroll Methods Available",

                             XA_INTEGER, 8, SCROLL_METHOD_NUM_FIELDS);

   if (!available || !available[SCROLL_METHOD_FIELD_2FG])

-- 

2.9.3