touchpad: add upper edge into exclusion zone

This reduces unexpected cursor moves when placing the thumb near the border
of trackpoint buttons and upper edge of touchpad.

https://bugs.freedesktop.org/show_bug.cgi?id=101574

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

2 files changed, 43 insertions, 28 deletions

diff --git a/doc/palm-detection.dox b/doc/palm-detection.dox
index c8ceb4eb..4dbd67c0 100644
--- a/doc/palm-detection.dox
+++ b/doc/palm-detection.dox
@@ -27,16 +27,20 @@ pressure ranges, see @ref touchpad_pressure.
 
 @section palm_exclusion_zones Palm exclusion zones
 
-libinput enables palm detection on the edge of the touchpad. Two exclusion
-zones are defined  on the left and right edge of the touchpad.
-If a touch starts in the exclusion zone, it is considered a palm and the
-touch point is ignored. However, for fast cursor movements across the
-screen, it is common for a finger to start inside an exclusion zone and move
-rapidly across the touchpad. libinput detects such movements and avoids palm
-detection on such touch sequences.
-
-Each exclusion zone is divided into a top part and a bottom part. A touch
-starting in the top part of the exclusion zone does not trigger a
+libinput enables palm detection on the left, right and top edges of the
+touchpad. Two exclusion zones are defined  on the left and right edge of the
+touchpad. If a touch starts in the exclusion zone, it is considered a palm
+and the touch point is ignored. However, for fast cursor movements across
+the screen, it is common for a finger to start inside an exclusion zone and
+move rapidly across the touchpad. libinput detects such movements and avoids
+palm detection on such touch sequences.
+
+Another exclusion zone is defined on the top edge of the touchpad. As with
+the edge zones, libinput detects vertical movements out of the edge zone and
+avoids palm detection on such touch sequences.
+
+Each side edge exclusion zone is divided into a top part and a bottom part.
+A touch starting in the top part of the exclusion zone does not trigger a
 tap (see @ref tapping).
 
 In the diagram below, the exclusion zones are painted red.
diff --git a/doc/svg/palm-detection.svg b/doc/svg/palm-detection.svg
index c3e45f44..2849e265 100644
--- a/doc/svg/palm-detection.svg
+++ b/doc/svg/palm-detection.svg
@@ -36,16 +36,17 @@
      inkscape:pageopacity="0"
      inkscape:pageshadow="2"
      inkscape:window-width="1920"
-     inkscape:window-height="1136"
+     inkscape:window-height="1016"
      id="namedview3477"
      showgrid="false"
      inkscape:zoom="3.5662625"
-     inkscape:cx="199.35048"
-     inkscape:cy="156.74673"
+     inkscape:cx="180.54059"
+     inkscape:cy="269.48563"
      inkscape:window-x="0"
      inkscape:window-y="27"
      inkscape:window-maximized="1"
-     inkscape:current-layer="svg2" />
+     inkscape:current-layer="svg2"
+     inkscape:document-rotation="0" />
   <defs
      id="defs4">
     <marker
@@ -138,15 +139,14 @@
      id="path13492"
      d="m 38.928571,67.914286 c 0,0 3.508205,24.810617 9.642857,57.857144 6.134651,33.04652 23.277202,79.68584 89.642852,90.35714" />
   <rect
-     style="fill:#000000;fill-opacity:0.3559322;fill-rule:evenodd;stroke:none;stroke-width:3.30527353px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+     style="fill:#000000;fill-opacity:0.3559322;fill-rule:evenodd;stroke:none;stroke-width:3.30510259px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
      id="rect3490"
-     width="65.272476"
-     height="136.21509"
+     width="65.310997"
+     height="136.12065"
      x="7.0411549"
-     y="7.0411549" />
+     y="7.1355872" />
   <text
-     sodipodi:linespacing="100%"
-     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:100%;font-family:Utopia;-inkscape-font-specification:Utopia;text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none"
+     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:0%;font-family:Utopia;-inkscape-font-specification:Utopia;text-align:start;writing-mode:lr-tb;text-anchor:start;fill:#000000;fill-opacity:1;stroke:none"
      xml:space="preserve"
      id="text13874"
      y="63.628628"
@@ -160,11 +160,10 @@
      id="rect3490-2"
      width="65.272476"
      height="136.21509"
-     x="321.23563"
-     y="6.7607527" />
+     x="321.22849"
+     y="6.8830237" />
   <text
-     sodipodi:linespacing="100%"
-     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:100%;font-family:Utopia;-inkscape-font-specification:Utopia;text-align:start;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none"
+     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:0%;font-family:Utopia;-inkscape-font-specification:Utopia;text-align:start;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none"
      xml:space="preserve"
      id="text13874-8"
      y="98.748993"
@@ -183,8 +182,7 @@
      id="layer1"
      style="display:inline" />
   <text
-     sodipodi:linespacing="100%"
-     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:100%;font-family:Utopia;-inkscape-font-specification:Utopia;text-align:start;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none"
+     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:0%;font-family:Utopia;-inkscape-font-specification:Utopia;text-align:start;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none"
      xml:space="preserve"
      id="text13874-8-1"
      y="46.009491"
@@ -194,8 +192,7 @@
        y="46.009491"
        x="342.27759">C</tspan></text>
   <text
-     sodipodi:linespacing="100%"
-     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:100%;font-family:Utopia;-inkscape-font-specification:Utopia;text-align:start;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none"
+     style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:12px;line-height:0%;font-family:Utopia;-inkscape-font-specification:Utopia;text-align:start;writing-mode:lr-tb;text-anchor:start;display:inline;fill:#000000;fill-opacity:1;stroke:none"
      xml:space="preserve"
      id="text13874-8-1-4"
      y="215.65927"
@@ -218,4 +215,18 @@
      cy="194.8819"
      r="4.0658817"
      transform="scale(-1,1)" />
+  <rect
+     width="248.87633"
+     height="6.8111157"
+     x="72.35215"
+     y="7.1355872"
+     id="rect4355"
+     style="color:#000000;display:inline;overflow:visible;visibility:visible;fill:#ff0000;fill-opacity:0.32017547;fill-rule:nonzero;stroke:none;stroke-width:1.11822701;marker:none;enable-background:accumulate" />
+  <rect
+     y="7.1355872"
+     x="72.35215"
+     height="6.8111153"
+     width="248.87634"
+     id="rect4353"
+     style="fill:#000000;fill-opacity:0.3559322;fill-rule:evenodd;stroke:none;stroke-width:1.44321382px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
 </svg>