evas: Add normalized and window coordinates to axis events

This is for Wacom graphics tablets (with a pen).

The raw data sent by ecore to evas (and then to apps) is pretty
useless as it's not normalized, and apps have no way of knowing the
dimensions of the tablet, without themselves opening the device
(we don't know nor expose the path to the device).

This is for Xi2 only for now, as Wayland support hasn't been done
yet.

The intent is to deprecate LABEL_X and LABEL_Y. I'm not sure yet
if the normalized value is useful or not (it would seem we may not
be able to provide this info in Wayland).

The new WINDOW_X, WINDOW_Y labels will be used in the new event
type (Efl.Event.Pointer). Normalized values are not exposed yet,
let's decide if we want them or not first (based on what can be
done in Wayland space).

@feature

6 files changed, 101 insertions, 12 deletions

diff --git a/src/lib/ecore_evas/ecore_evas.c b/src/lib/ecore_evas/ecore_evas.c
index 9b43ec370e..d8d5b8b1e3 100644
--- a/src/lib/ecore_evas/ecore_evas.c
+++ b/src/lib/ecore_evas/ecore_evas.c
@@ -4525,6 +4525,7 @@ _direct_mouse_out_cb(Ecore_Evas *ee, const Ecore_Event_Mouse_IO *info)
 static Eina_Bool
 _direct_axis_update_cb(Ecore_Evas *ee, const Ecore_Event_Axis_Update *info)
 {
+   Eina_Bool haswinx = 0, haswiny = 0;
    Efl_Event_Pointer_Data *ev;
    Efl_Event_Pointer *evt;
    Evas *e = ee->evas;
@@ -4549,14 +4550,40 @@ _direct_axis_update_cb(Ecore_Evas *ee, const Ecore_Event_Axis_Update *info)
         const Ecore_Axis *axis = &(info->axis[n]);
         switch (axis->label)
           {
-           case EVAS_AXIS_LABEL_X:
+           case EVAS_AXIS_LABEL_WINDOW_X:
              _efl_input_value_mark(ev, EFL_INPUT_VALUE_X);
              x = axis->value;
+             haswinx = EINA_TRUE;
              break;
 
-           case EVAS_AXIS_LABEL_Y:
+           case EVAS_AXIS_LABEL_WINDOW_Y:
              _efl_input_value_mark(ev, EFL_INPUT_VALUE_Y);
              y = axis->value;
+             haswiny = EINA_TRUE;
+             break;
+
+           case EVAS_AXIS_LABEL_X:
+             if (!haswinx)
+               {
+                  _efl_input_value_mark(ev, EFL_INPUT_VALUE_X);
+                  x = axis->value;
+               }
+             break;
+
+           case EVAS_AXIS_LABEL_Y:
+             if (!haswiny)
+               {
+                  _efl_input_value_mark(ev, EFL_INPUT_VALUE_Y);
+                  y = axis->value;
+               }
+             break;
+
+           case EVAS_AXIS_LABEL_NORMAL_X:
+             ev->raw.x = axis->value;
+             break;
+
+           case EVAS_AXIS_LABEL_NORMAL_Y:
+             ev->raw.y = axis->value;
              break;
 
            case EVAS_AXIS_LABEL_PRESSURE:
diff --git a/src/lib/ecore_input/Ecore_Input.h b/src/lib/ecore_input/Ecore_Input.h
index 45f6c387bd..1122b6457c 100644
--- a/src/lib/ecore_input/Ecore_Input.h
+++ b/src/lib/ecore_input/Ecore_Input.h
@@ -319,7 +319,11 @@ extern "C" {
         ECORE_AXIS_LABEL_TOUCH_WIDTH_MAJOR,   /**< Length of contact ellipse along AZIMUTH. Range: Unbounded: Unit: Same as ECORE_AXIS_LABEL_{X,Y}. @since 1.13 */
         ECORE_AXIS_LABEL_TOUCH_WIDTH_MINOR,   /**< Length of contact ellipse perpendicular to AZIMUTH. Range: Unbounded. Unit: Same as ECORE_AXIS_LABEL_{X,Y}. @since 1.13 */
         ECORE_AXIS_LABEL_TOOL_WIDTH_MAJOR,    /**< Length of tool ellipse along AZIMUTH. Range: Unbounded. Unit: Same as ECORE_AXIS_LABEL_{X,Y}. @since 1.13 */
-        ECORE_AXIS_LABEL_TOOL_WIDTH_MINOR     /**< Length of tool ellipse perpendicular to AZIMUTH. Range: Unbounded. Unit: Same as ECORE_AXIS_LABEL_{X,Y}. @since 1.13 */
+        ECORE_AXIS_LABEL_TOOL_WIDTH_MINOR,    /**< Length of tool ellipse perpendicular to AZIMUTH. Range: Unbounded. Unit: Same as ECORE_AXIS_LABEL_{X,Y}. @since 1.13 */
+        ECORE_AXIS_LABEL_WINDOW_X,      /**< X coordinate mapped to the window. @since 1.19 */
+        ECORE_AXIS_LABEL_WINDOW_Y,      /**< Y coordinate mapped to the window. @since 1.19 */
+        ECORE_AXIS_LABEL_NORMAL_X,      /**< X normalized to the [0, 1] range. @since 1.19 */
+        ECORE_AXIS_LABEL_NORMAL_Y,      /**< Y normalized to the [0, 1] range. @since 1.19 */
    } Ecore_Axis_Label; /**< @since 1.13 */
 
    struct _Ecore_Axis
diff --git a/src/lib/ecore_x/xlib/ecore_x_xi2.c b/src/lib/ecore_x/xlib/ecore_x_xi2.c
index be19de2c94..089c2a7029 100644
--- a/src/lib/ecore_x/xlib/ecore_x_xi2.c
+++ b/src/lib/ecore_x/xlib/ecore_x_xi2.c
@@ -494,7 +494,7 @@ _ecore_x_input_axis_handler(XEvent *xevent, XIDeviceInfo *dev)
 {
    if (xevent->type != GenericEvent) return;
    XIDeviceEvent *evd = (XIDeviceEvent *)(xevent->xcookie.data);
-   unsigned int n = _ecore_x_count_bits(*evd->valuators.mask);
+   unsigned int n = _ecore_x_count_bits(*evd->valuators.mask) + 4;
    int i;
    int j = 0;
    double tiltx = 0, tilty = 0;
@@ -514,15 +514,29 @@ _ecore_x_input_axis_handler(XEvent *xevent, XIDeviceInfo *dev)
                {
                   if (inf->label == _ecore_x_input_get_axis_label("Abs X"))
                     {
+                       int x = evd->valuators.values[j];
                        axis_ptr->label = ECORE_AXIS_LABEL_X;
-                       axis_ptr->value = evd->valuators.values[j];
+                       axis_ptr->value = x;
                        axis_ptr++;
+                       if (inf->max > inf->min)
+                         {
+                            axis_ptr->label = ECORE_AXIS_LABEL_NORMAL_X;
+                            axis_ptr->value = (x - inf->min) / (inf->max - inf->min);
+                            axis_ptr++;
+                         }
                     }
                   else if (inf->label == _ecore_x_input_get_axis_label("Abs Y"))
                     {
+                       int y = evd->valuators.values[j];
                        axis_ptr->label = ECORE_AXIS_LABEL_Y;
-                       axis_ptr->value = evd->valuators.values[j];
+                       axis_ptr->value = y;
                        axis_ptr++;
+                       if (inf->max > inf->min)
+                         {
+                            axis_ptr->label = ECORE_AXIS_LABEL_NORMAL_Y;
+                            axis_ptr->value = (y - inf->min) / (inf->max - inf->min);
+                            axis_ptr++;
+                         }
                     }
                   else if (inf->label == _ecore_x_input_get_axis_label("Abs Pressure"))
                     {
@@ -602,6 +616,15 @@ _ecore_x_input_axis_handler(XEvent *xevent, XIDeviceInfo *dev)
    n = (axis_ptr - axis);
    if (n > 0)
      {
+        /* event position in the window - most useful */
+        axis_ptr->label = ECORE_AXIS_LABEL_WINDOW_X;
+        axis_ptr->value = evd->event_x;
+        axis_ptr++;
+        axis_ptr->label = ECORE_AXIS_LABEL_WINDOW_Y;
+        axis_ptr->value = evd->event_y;
+        axis_ptr++;
+        n += 2;
+
         shrunk_axis = realloc(axis, n * sizeof(Ecore_Axis));
         if (shrunk_axis != NULL) axis = shrunk_axis;
         _ecore_x_axis_update(evd->child ? evd->child : evd->event,
diff --git a/src/lib/efl/interfaces/efl_common_internal.h b/src/lib/efl/interfaces/efl_common_internal.h
index 03940d560b..95b8681b67 100644
--- a/src/lib/efl/interfaces/efl_common_internal.h
+++ b/src/lib/efl/interfaces/efl_common_internal.h
@@ -33,7 +33,7 @@ struct _Efl_Event_Pointer_Data
    double          radius, radius_x, radius_y;
    double          pressure;
    double          angle;
-   Eina_Vector2    cur, prev;
+   Eina_Vector2    cur, prev, raw;
    struct {
       Efl_Orient   dir;
       int          z;
diff --git a/src/lib/evas/Evas_Common.h b/src/lib/evas/Evas_Common.h
index 00c17d2af5..05c2a0607e 100644
--- a/src/lib/evas/Evas_Common.h
+++ b/src/lib/evas/Evas_Common.h
@@ -607,7 +607,11 @@ typedef enum _Evas_Axis_Label
    EVAS_AXIS_LABEL_TOUCH_WIDTH_MAJOR,   /**< Length of contact ellipse along AZIMUTH. Range: Unbounded: Unit: Same as EVAS_AXIS_LABEL_{X,Y}. @since 1.13 */
    EVAS_AXIS_LABEL_TOUCH_WIDTH_MINOR,   /**< Length of contact ellipse perpendicular to AZIMUTH. Range: Unbounded. Unit: Same as EVAS_AXIS_LABEL_{X,Y}. @since 1.13 */
    EVAS_AXIS_LABEL_TOOL_WIDTH_MAJOR,    /**< Length of tool ellipse along AZIMUTH. Range: Unbounded. Unit: Same as EVAS_AXIS_LABEL_{X,Y}. @since 1.13 */
-   EVAS_AXIS_LABEL_TOOL_WIDTH_MINOR     /**< Length of tool ellipse perpendicular to AZIMUTH. Range: Unbounded. Unit: Same as EVAS_AXIS_LABEL_{X,Y}. @since 1.13 */
+   EVAS_AXIS_LABEL_TOOL_WIDTH_MINOR,    /**< Length of tool ellipse perpendicular to AZIMUTH. Range: Unbounded. Unit: Same as EVAS_AXIS_LABEL_{X,Y}. @since 1.13 */
+   EVAS_AXIS_LABEL_WINDOW_X,      /**< X coordinate mapped to the window. @since 1.19 */
+   EVAS_AXIS_LABEL_WINDOW_Y,      /**< Y coordinate mapped to the window. @since 1.19 */
+   EVAS_AXIS_LABEL_NORMAL_X,      /**< X normalized to the [0, 1] range. @since 1.19 */
+   EVAS_AXIS_LABEL_NORMAL_Y,      /**< Y normalized to the [0, 1] range. @since 1.19 */
 } Evas_Axis_Label; /**< Types of recognized device axes @since 1.13 */
 
 struct _Evas_Axis
diff --git a/src/lib/evas/canvas/evas_events.c b/src/lib/evas/canvas/evas_events.c
index f94566b8fe..d8359478b2 100644
--- a/src/lib/evas/canvas/evas_events.c
+++ b/src/lib/evas/canvas/evas_events.c
@@ -2929,7 +2929,9 @@ evas_event_feed_axis_update(Evas *eo_e, unsigned int timestamp, int device, int
    EINA_SAFETY_ON_FALSE_RETURN(efl_isa(eo_e, EVAS_CANVAS_CLASS));
    Evas_Public_Data *e = efl_data_scope_get(eo_e, EVAS_CANVAS_CLASS);
    Efl_Event_Pointer_Data *ev = NULL;
+   Eina_Bool haswinx = 0, haswiny = 0;
    Efl_Event_Pointer *evt;
+   double x = 0, y = 0;
    int n;
 
    evt = efl_event_instance_get(EFL_EVENT_POINTER_CLASS, eo_e, (void **) &ev);
@@ -2946,14 +2948,40 @@ evas_event_feed_axis_update(Evas *eo_e, unsigned int timestamp, int device, int
         const Evas_Axis *axis = &(axes[n]);
         switch (axis->label)
           {
-           case EVAS_AXIS_LABEL_X:
+           case EVAS_AXIS_LABEL_WINDOW_X:
              _efl_input_value_mark(ev, EFL_INPUT_VALUE_X);
-             ev->cur.x = axis->value;
+             x = axis->value;
+             haswinx = EINA_TRUE;
              break;
 
-           case EVAS_AXIS_LABEL_Y:
+           case EVAS_AXIS_LABEL_WINDOW_Y:
              _efl_input_value_mark(ev, EFL_INPUT_VALUE_Y);
-             ev->cur.y = axis->value;
+             y = axis->value;
+             haswiny = EINA_TRUE;
+             break;
+
+           case EVAS_AXIS_LABEL_X:
+             if (!haswinx)
+               {
+                  _efl_input_value_mark(ev, EFL_INPUT_VALUE_X);
+                  x = axis->value;
+               }
+             break;
+
+           case EVAS_AXIS_LABEL_Y:
+             if (!haswiny)
+               {
+                  _efl_input_value_mark(ev, EFL_INPUT_VALUE_Y);
+                  y = axis->value;
+               }
+             break;
+
+           case EVAS_AXIS_LABEL_NORMAL_X:
+             ev->raw.x = axis->value;
+             break;
+
+           case EVAS_AXIS_LABEL_NORMAL_Y:
+             ev->raw.y = axis->value;
              break;
 
            case EVAS_AXIS_LABEL_PRESSURE:
@@ -2979,6 +3007,9 @@ evas_event_feed_axis_update(Evas *eo_e, unsigned int timestamp, int device, int
           }
      }
 
+   ev->cur.x = x;
+   ev->cur.y = y;
+
    /* FIXME: set proper device based on the device id (X or WL specific) */
    ev->device = _evas_device_top_get(eo_e); // FIXME
    (void) device;