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Blame SOURCES/0001-Add-a-gtk-overlay-scrolling-setting.patch

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From 044383fe4533c59a0bbd58c977ed2ba5fb5862b8 Mon Sep 17 00:00:00 2001
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From: Matthias Clasen <mclasen@redhat.com>
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Date: Fri, 31 May 2019 11:46:19 -0400
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Subject: [PATCH 1/2] Add a gtk-overlay-scrolling setting
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This is in preparation for letting user opt out of
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overlay scrolling in the control-center.
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---
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 gdk/wayland/gdkscreen-wayland.c |  2 +-
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 gdk/x11/gdksettings.c           |  1 +
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 gtk/gtksettings.c               | 21 ++++++++++++++++++++-
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 3 files changed, 22 insertions(+), 2 deletions(-)
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diff --git a/gdk/wayland/gdkscreen-wayland.c b/gdk/wayland/gdkscreen-wayland.c
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index 6aff3a5a1a..5e156072f2 100644
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--- a/gdk/wayland/gdkscreen-wayland.c
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+++ b/gdk/wayland/gdkscreen-wayland.c
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@@ -502,6 +502,7 @@ static TranslationEntry translations[] = {
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   { FALSE, "org.gnome.desktop.interface", "gtk-im-module", "gtk-im-module", G_TYPE_STRING, { .s = "simple" } },
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   { FALSE, "org.gnome.desktop.interface", "enable-animations", "gtk-enable-animations", G_TYPE_BOOLEAN, { .b = TRUE } },
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   { FALSE, "org.gnome.desktop.interface", "gtk-enable-primary-paste", "gtk-enable-primary-paste", G_TYPE_BOOLEAN, { .b = TRUE } },
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+  { FALSE, "org.gnome.desktop.interface", "overlay-scrolling", "gtk-overlay-scrolling", G_TYPE_BOOLEAN, { .b = TRUE } },
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   { FALSE, "org.gnome.settings-daemon.peripherals.mouse", "double-click", "gtk-double-click-time", G_TYPE_INT, { .i = 400 } },
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   { FALSE, "org.gnome.settings-daemon.peripherals.mouse", "drag-threshold", "gtk-dnd-drag-threshold", G_TYPE_INT, {.i = 8 } },
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   { FALSE, "org.gnome.desktop.sound", "theme-name", "gtk-sound-theme-name", G_TYPE_STRING, { .s = "freedesktop" } },
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diff --git a/gdk/x11/gdksettings.c b/gdk/x11/gdksettings.c
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index f8bb6d896b..869c239b18 100644
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--- a/gdk/x11/gdksettings.c
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+++ b/gdk/x11/gdksettings.c
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@@ -69,6 +69,7 @@ static const struct {
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   {"Gtk/RecentFilesMaxAge",   "gtk-recent-files-max-age"},
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   {"Gtk/RecentFilesEnabled",  "gtk-recent-files-enabled"},
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   {"Gtk/KeynavUseCaret",      "gtk-keynav-use-caret"},
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+  {"Gtk/OverlayScrolling",    "gtk-overlay-scrolling"},
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   /* These are here in order to be recognized, but are not sent to
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      gtk as they are handled internally by gdk: */
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diff --git a/gtk/gtksettings.c b/gtk/gtksettings.c
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index 571ae11cd4..b83d9d5561 100644
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--- a/gtk/gtksettings.c
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+++ b/gtk/gtksettings.c
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@@ -224,7 +224,8 @@ enum {
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   PROP_ENABLE_PRIMARY_PASTE,
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   PROP_RECENT_FILES_ENABLED,
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   PROP_LONG_PRESS_TIME,
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-  PROP_KEYNAV_USE_CARET
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+  PROP_KEYNAV_USE_CARET,
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+  PROP_OVERLAY_SCROLLING
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 };
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 /* --- prototypes --- */
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@@ -1767,6 +1768,24 @@ gtk_settings_class_init (GtkSettingsClass *class)
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                                                                    GTK_PARAM_READWRITE),
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                                              NULL);
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   g_assert (result == PROP_KEYNAV_USE_CARET);
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+
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+  /**
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+   * GtkSettings:gtk-overlay-scrolling:
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+   *
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+   * Whether scrolled windows may use overlayed scrolling indicators.
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+   * If this is set to %FALSE, scrolled windows will have permanent
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+   * scrollbars.
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+   *
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+   * Since: 3.24.9
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+   */
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+  result = settings_install_property_parser (class,
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+                                             g_param_spec_boolean ("gtk-overlay-scrolling",
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+                                                                   P_("Whether to use overlay scrollbars"),
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+                                                                   P_("Whether to use overlay scrollbars"),
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+                                                                   TRUE,
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+                                                                   GTK_PARAM_READWRITE),
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+                                             NULL);
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+  g_assert (result == PROP_OVERLAY_SCROLLING);
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 }
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 static void
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-- 
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2.23.0
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