Bug 356536 - [Mac] XUL Scroll bar slider jumps back up when mouse cursor strays from near scroll bar. patch from Stefan <stefanh@bluebottle.com>, r=me, sr=roc.

layout/xul/base/src/nsSliderFrame.cpp

@@ -79,7 +79,7 @@
 #include "nsDisplayList.h"
 
 PRBool nsSliderFrame::gMiddlePref = PR_FALSE;
-PRInt32 nsSliderFrame::gSnapMultiplier = 6;
+PRInt32 nsSliderFrame::gSnapMultiplier;
 
 // Turn this on if you want to debug slider frames.
 #undef DEBUG_SLIDER

modules/libpref/src/init/all.js

@@ -189,8 +189,10 @@ pref("nglayout.events.dispatchLeftClickOnly", true);
 // whether or not to use xbl form controls
 pref("nglayout.debug.enable_xbl_forms", false);
 
-// size of scrollbar snapping region
-pref("slider.snapMultiplier", 6);
+// scrollbar snapping region
+// 0 - off
+// 1 and higher - slider thickness multiple
+pref("slider.snapMultiplier", 0);
 
 // option to choose plug-in finder
 pref("application.use_ns_plugin_finder", false);
@@ -1342,6 +1344,9 @@ pref("ui.key.menuAccessKeyFocuses", true);
 // override double-click word selection behavior.
 pref("layout.word_select.eat_space_to_next_word", true);
 
+// scrollbar snapping region
+pref("slider.snapMultiplier", 6);
+
 // print_extra_margin enables platforms to specify an extra gap or margin
 // around the content of the page for Print Preview only
 pref("print.print_extra_margin", 90); // twips (90 twips is an eigth of an inch)
@@ -1743,9 +1748,6 @@ pref("netinst.profile.show_profile_wizard", true);
 
 pref("middlemouse.paste", true);
 
-// turn off scrollbar snapping
-pref("slider.snapMultiplier", 0);
-
 // override double-click word selection behavior.
 pref("layout.word_select.eat_space_to_next_word", true);
 pref("layout.word_select.stop_at_punctuation", false);
@@ -1900,9 +1902,6 @@ pref("layout.word_select.stop_at_punctuation", false);
 pref("autocomplete.grab_during_popup", true);
 pref("autocomplete.ungrab_during_mode_switch", true);
 
-// turn off scrollbar snapping
-pref("slider.snapMultiplier", 0);
-
 // Default to using the system filepicker if possible, but allow
 // toggling to use the XUL filepicker
 pref("ui.allow_platform_file_picker", true);