Make mouse cursor temporarily hide on keyboard input.

Note: We are very liberal in hiding the mouse cursor, much like Preview
and some other apps. Safari is much more conservative (e.g., press "x"
in random text content), but for us to do that we'd have to wire up the
renderer to tell us when to hide the cursor.

BUG=14077
TEST=Give web content keyboard focus, press various keys.

Patch by viettrungluu@gmail.com

Review URL: http://codereview.chromium.org/165252

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@22941 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 12 insertions, 0 deletions

diff --git a/chrome/browser/renderer_host/render_widget_host_view_mac.mm b/chrome/browser/renderer_host/render_widget_host_view_mac.mm
index ea3bf8f..ae77260 100644
--- a/chrome/browser/renderer_host/render_widget_host_view_mac.mm
+++ b/chrome/browser/renderer_host/render_widget_host_view_mac.mm
@@ -23,6 +23,7 @@ using WebKit::WebMouseEvent;
 using WebKit::WebMouseWheelEvent;
 
 @interface RenderWidgetHostViewCocoa (Private)
++ (BOOL)shouldAutohideCursorForEvent:(NSEvent*)event;
 - (id)initWithRenderWidgetHostViewMac:(RenderWidgetHostViewMac*)r;
 - (void)cancelChildPopups;
 @end
@@ -495,6 +496,10 @@ void RenderWidgetHostViewMac::SetActive(bool active) {
   // (See <https://bugs.webkit.org/show_bug.cgi?id=25119>).
   if ([theEvent type] == NSKeyDown)
     [self interpretKeyEvents:[NSArray arrayWithObject:theEvent]];
+
+  // Possibly autohide the cursor.
+  if ([RenderWidgetHostViewCocoa shouldAutohideCursorForEvent:theEvent])
+    [NSCursor setHiddenUntilMouseMoves:YES];
 }
 
 - (void)scrollWheel:(NSEvent *)theEvent {
@@ -667,6 +672,13 @@ void RenderWidgetHostViewMac::SetActive(bool active) {
   return renderWidgetHostView_;
 }
 
+// Determine whether we should autohide the cursor (i.e., hide it until mouse
+// move) for the given event. Customize here to be more selective about which
+// key presses to autohide on.
++ (BOOL)shouldAutohideCursorForEvent:(NSEvent*)event {
+  return ([event type] == NSKeyDown) ? YES : NO;
+}
+
 
 // Below is the nasty tooltip stuff -- copied from WebKit's WebHTMLView.mm
 // with minor modifications for code style and commenting.