Adding upstream version 3.38.6.upstream/3.38.6upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 196 insertions, 0 deletions

diff --git a/src/shell-stack.c b/src/shell-stack.c
new file mode 100644
index 0000000..79841e0
--- /dev/null
+++ b/src/shell-stack.c
@@ -0,0 +1,196 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/**
+ * SECTION:shell-stack
+ * @short_description: Pure "Z-axis" container class
+ *
+ * A #ShellStack draws its children on top of each other,
+ * aligned to the top left.  It will be sized in width/height
+ * according to the largest such dimension of its children, and
+ * all children will be allocated that size.  This differs
+ * from #ClutterGroup which allocates its children their natural
+ * size, even if that would overflow the size allocated to the stack.
+ */
+
+#include "config.h"
+
+#include "shell-stack.h"
+
+struct _ShellStack
+{
+    StWidget parent;
+};
+
+G_DEFINE_TYPE (ShellStack, shell_stack, ST_TYPE_WIDGET);
+
+static void
+shell_stack_allocate (ClutterActor           *self,
+                      const ClutterActorBox  *box)
+{
+  StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
+  ClutterActorBox content_box;
+  ClutterActor *child;
+
+  clutter_actor_set_allocation (self, box);
+
+  st_theme_node_get_content_box (theme_node, box, &content_box);
+
+  for (child = clutter_actor_get_first_child (self);
+       child != NULL;
+       child = clutter_actor_get_next_sibling (child))
+    {
+      ClutterActorBox child_box = content_box;
+      clutter_actor_allocate (child, &child_box);
+    }
+}
+
+static void
+shell_stack_get_preferred_height (ClutterActor *actor,
+                                  gfloat for_width,
+                                  gfloat *min_height_p,
+                                  gfloat *natural_height_p)
+{
+  StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor));
+  gboolean first = TRUE;
+  float min = 0, natural = 0;
+  ClutterActor *child;
+
+  st_theme_node_adjust_for_width (theme_node, &for_width);
+
+  for (child = clutter_actor_get_first_child (actor);
+       child != NULL;
+       child = clutter_actor_get_next_sibling (child))
+    {
+      float child_min, child_natural;
+
+      clutter_actor_get_preferred_height (child,
+                                          for_width,
+                                          &child_min,
+                                          &child_natural);
+
+      if (first)
+        {
+          first = FALSE;
+          min = child_min;
+          natural = child_natural;
+        }
+      else
+        {
+          if (child_min > min)
+            min = child_min;
+
+          if (child_natural > natural)
+            natural = child_natural;
+        }
+    }
+
+  if (min_height_p)
+    *min_height_p = min;
+
+  if (natural_height_p)
+    *natural_height_p = natural;
+
+  st_theme_node_adjust_preferred_height (theme_node, min_height_p, natural_height_p);
+}
+
+static void
+shell_stack_get_preferred_width (ClutterActor *actor,
+                                 gfloat for_height,
+                                 gfloat *min_width_p,
+                                 gfloat *natural_width_p)
+{
+  StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (actor));
+  gboolean first = TRUE;
+  float min = 0, natural = 0;
+  ClutterActor *child;
+
+  st_theme_node_adjust_for_height (theme_node, &for_height);
+
+  for (child = clutter_actor_get_first_child (actor);
+       child != NULL;
+       child = clutter_actor_get_next_sibling (child))
+    {
+      float child_min, child_natural;
+
+      clutter_actor_get_preferred_width (child,
+                                         for_height,
+                                         &child_min,
+                                         &child_natural);
+
+      if (first)
+        {
+          first = FALSE;
+          min = child_min;
+          natural = child_natural;
+        }
+      else
+        {
+          if (child_min > min)
+            min = child_min;
+
+          if (child_natural > natural)
+            natural = child_natural;
+        }
+    }
+
+  if (min_width_p)
+    *min_width_p = min;
+
+  if (natural_width_p)
+    *natural_width_p = natural;
+
+  st_theme_node_adjust_preferred_width (theme_node, min_width_p, natural_width_p);
+}
+
+static gboolean
+shell_stack_navigate_focus (StWidget         *widget,
+                            ClutterActor     *from,
+                            StDirectionType   direction)
+{
+  ClutterActor *top_actor;
+
+  /* If the stack is itself focusable, then focus into or out of
+   * it, as appropriate.
+   */
+  if (st_widget_get_can_focus (widget))
+    {
+      if (from && clutter_actor_contains (CLUTTER_ACTOR (widget), from))
+        return FALSE;
+
+      if (clutter_actor_is_mapped (CLUTTER_ACTOR (widget)))
+        {
+          clutter_actor_grab_key_focus (CLUTTER_ACTOR (widget));
+          return TRUE;
+        }
+      else
+        {
+          return FALSE;
+        }
+    }
+
+  top_actor = clutter_actor_get_last_child (CLUTTER_ACTOR (widget));
+  while (top_actor && !clutter_actor_is_visible (top_actor))
+    top_actor = clutter_actor_get_previous_sibling (top_actor);
+  if (ST_IS_WIDGET (top_actor))
+    return st_widget_navigate_focus (ST_WIDGET (top_actor), from, direction, FALSE);
+  else
+    return FALSE;
+}
+
+static void
+shell_stack_class_init (ShellStackClass *klass)
+{
+  ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass);
+  StWidgetClass *widget_class = ST_WIDGET_CLASS (klass);
+
+  actor_class->get_preferred_width = shell_stack_get_preferred_width;
+  actor_class->get_preferred_height = shell_stack_get_preferred_height;
+  actor_class->allocate = shell_stack_allocate;
+
+  widget_class->navigate_focus = shell_stack_navigate_focus;
+}
+
+static void
+shell_stack_init (ShellStack *actor)
+{
+}