[epiphany] Constrain pages popover to current window

[Michael Catanzaro <mcatanzaro src gnome org>]

commit ee9728ebb7cec15d86e672b2fbee74de4fe8cae6
Author: Jan-Michael Brummer <jan brummer tabos org>
Date:   Thu May 2 15:50:01 2019 +0200

    Constrain pages popover to current window
    
    Fixes: https://gitlab.gnome.org/GNOME/epiphany/issues/656

 src/ephy-pages-popover.c | 35 +++++++++++++++++++++++++++++++++++
 src/meson.build          |  1 +
 2 files changed, 36 insertions(+)
---
diff --git a/src/ephy-pages-popover.c b/src/ephy-pages-popover.c
index a1ba5311e..b490d1a4b 100644
--- a/src/ephy-pages-popover.c
+++ b/src/ephy-pages-popover.c
@@ -23,6 +23,10 @@
 
 #include "ephy-pages-popover.h"
 
+#ifdef GDK_WINDOWING_X11
+#include <gdk/gdkx.h>
+#endif
+
 #define HANDY_USE_UNSTABLE_API
 #include <handy.h>
 #include "ephy-notebook.h"
@@ -160,6 +164,30 @@ ephy_pages_popover_dispose (GObject *object)
   G_OBJECT_CLASS (ephy_pages_popover_parent_class)->dispose (object);
 }
 
+#ifdef GDK_WINDOWING_X11
+static void
+ephy_pages_popover_get_preferred_height (GtkWidget *widget,
+                                         gint      *minimum_height,
+                                         gint      *natural_height)
+{
+  EphyPagesPopover *self = EPHY_PAGES_POPOVER (widget);
+  int height;
+
+  GTK_WIDGET_CLASS (ephy_pages_popover_parent_class)->get_preferred_height (widget,
+                                                                            minimum_height,
+                                                                            natural_height);
+  /* Ensure that popover won't leave current window */
+  height = gtk_widget_get_allocated_height (GTK_WIDGET (self->notebook));
+  gtk_scrolled_window_set_max_content_height (self->scrolled_window, height);
+}
+
+static GtkSizeRequestMode
+ephy_pages_popover_get_request_mode (GtkWidget *widget)
+{
+  return GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT;
+}
+#endif
+
 static void
 ephy_pages_popover_class_init (EphyPagesPopoverClass *klass)
 {
@@ -169,6 +197,13 @@ ephy_pages_popover_class_init (EphyPagesPopoverClass *klass)
   object_class->dispose = ephy_pages_popover_dispose;
   object_class->finalize = ephy_pages_popover_finalize;
 
+#ifdef GDK_WINDOWING_X11
+  if (GDK_IS_X11_DISPLAY (gdk_display_get_default ())) {
+    widget_class->get_request_mode = ephy_pages_popover_get_request_mode;
+    widget_class->get_preferred_height = ephy_pages_popover_get_preferred_height;
+  }
+#endif
+
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/epiphany/gtk/pages-popover.ui");
   gtk_widget_class_bind_template_child (widget_class, EphyPagesPopover, list_box);
   gtk_widget_class_bind_template_child (widget_class, EphyPagesPopover, scrolled_window);
diff --git a/src/meson.build b/src/meson.build
index e463a5008..66597f5d4 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -61,6 +61,7 @@ libephymain_deps = [
   ephymisc_dep,
   ephysync_dep,
   ephywidgets_dep,
+  gdk_dep,
   libhandy_dep,
   libnotify_dep
 ]