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gtk2/gtk/gtkcssnode.c
Benjamin Otte f6606c4f6f cssnode: Clear cache if reusing style 
When we reuse styles that didn't change across changes to the source
CSS, make sure we clear the caches. Otherwise child nodes will pick up
styles from the old source CSS.
2015-12-15 01:15:51 +01:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2014 Benjamin Otte <otte@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcssnodeprivate.h"
#include "gtkcssanimatedstyleprivate.h"
#include "gtkdebug.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtksettingsprivate.h"
#include "gtktypebuiltins.h"
/*
* CSS nodes are the backbone of the GtkStyleContext implementation and
* replace the role that GtkWidgetPath played in the past. A CSS node has
* an element name and a state, and can have an id and style classes, which
* is what is needed to determine the matching CSS selectors. CSS nodes have
* a 'visible' property, which makes it possible to temporarily 'hide' them
* from CSS matching - e.g. an invisible node will not affect :nth-child
* matching and so forth.
*
* The API to manage states, names, ids and classes of CSS nodes is:
* - gtk_css_node_get/set_state. States are represented as GtkStateFlags
* - gtk_css_node_get/set_name. Names are represented as interned strings
* - gtk_css_node_get/set_id. Ids are represented as interned strings
* - gtk_css_node_add/remove/has_class and gtk_css_node_list_classes. Style
* classes are represented as quarks.
*
* CSS nodes are organized in a dom-like tree, and there is API to navigate
* and manipulate this tree:
* - gtk_css_node_set_parent
* - gtk_css_node_insert_before/after
* - gtk_css_node_get_parent
* - gtk_css_node_get_first/last_child
* - gtk_css_node_get_previous/next_sibling
* Note that parents keep a reference on their children in this tree.
*
* Every widget has one or more CSS nodes - the first one gets created
* automatically by GtkStyleContext. To set the name of the main node,
* call gtk_widget_class_set_css_name() in class_init(). Widget implementations
* can and should add subnodes as suitable.
*
* Best practice is:
* - For permanent subnodes, create them in init(), and keep a pointer
* to the node (you don't have to keep a reference, cleanup will be
* automatic by means of the parent node getting cleaned up by the
* style context).
* - For transient nodes, create/destroy them when the conditions that
* warrant their existence change.
* - Keep the state of all your nodes up-to-date. This probably requires
* a ::state-flags-changed (and possibly ::direction-changed) handler,
* as well as code to update the state in other places. Note that GTK+
* does this automatically for the widget's main CSS node.
* - The sibling ordering in the CSS node tree is supposed to correspond
* to the visible order of content: top-to-bottom and left-to-right.
* Reorder your nodes to maintain this correlation. In particular for
* horizontally layed out widgets, this will require listening to
* ::direction-changed.
* - The draw function should just use gtk_style_context_save_to_node() to
* 'switch' to the right node, not make any other changes to the style
* context.
*
* A noteworthy difference between gtk_style_context_save() and
* gtk_style_context_save_to_node() is that the former inherits all the
* style classes from the main CSS node, which often leads to unintended
* inheritance.
*/
/* When these change we do a full restyling. Otherwise we try to figure out
* if we need to change things. */
#define GTK_CSS_RADICAL_CHANGE (GTK_CSS_CHANGE_ID | GTK_CSS_CHANGE_NAME | GTK_CSS_CHANGE_CLASS | GTK_CSS_CHANGE_SOURCE | GTK_CSS_CHANGE_PARENT_STYLE)
G_DEFINE_TYPE (GtkCssNode, gtk_css_node, G_TYPE_OBJECT)
enum {
NODE_ADDED,
NODE_REMOVED,
STYLE_CHANGED,
LAST_SIGNAL
};
enum {
PROP_0,
PROP_CLASSES,
PROP_ID,
PROP_NAME,
PROP_STATE,
PROP_VISIBLE,
PROP_WIDGET_TYPE,
NUM_PROPERTIES
};
struct _GtkCssNodeStyleChange {
GtkCssStyle *old_style;
GtkCssStyle *new_style;
};
static guint cssnode_signals[LAST_SIGNAL] = { 0 };
static GParamSpec *cssnode_properties[NUM_PROPERTIES];
static GQuark quark_global_cache;
static GtkStyleProviderPrivate *
gtk_css_node_get_style_provider_or_null (GtkCssNode *cssnode)
{
return GTK_CSS_NODE_GET_CLASS (cssnode)->get_style_provider (cssnode);
}
static void
gtk_css_node_set_invalid (GtkCssNode *node,
gboolean invalid)
{
if (node->invalid == invalid)
return;
node->invalid = invalid;
if (node->visible)
{
if (node->parent)
{
if (invalid)
gtk_css_node_set_invalid (node->parent, TRUE);
}
else
{
if (invalid)
GTK_CSS_NODE_GET_CLASS (node)->queue_validate (node);
else
GTK_CSS_NODE_GET_CLASS (node)->dequeue_validate (node);
}
}
}
static void
gtk_css_node_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkCssNode *cssnode = GTK_CSS_NODE (object);
switch (property_id)
{
case PROP_CLASSES:
g_value_take_boxed (value, gtk_css_node_get_classes (cssnode));
break;
case PROP_ID:
g_value_set_string (value, gtk_css_node_get_id (cssnode));
break;
case PROP_NAME:
g_value_set_string (value, gtk_css_node_get_name (cssnode));
break;
case PROP_STATE:
g_value_set_flags (value, gtk_css_node_get_state (cssnode));
break;
case PROP_VISIBLE:
g_value_set_boolean (value, gtk_css_node_get_visible (cssnode));
break;
case PROP_WIDGET_TYPE:
g_value_set_gtype (value, gtk_css_node_get_widget_type (cssnode));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
gtk_css_node_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCssNode *cssnode = GTK_CSS_NODE (object);
switch (property_id)
{
case PROP_CLASSES:
gtk_css_node_set_classes (cssnode, g_value_get_boxed (value));
break;
case PROP_ID:
gtk_css_node_set_id (cssnode, g_value_get_string (value));
break;
case PROP_NAME:
gtk_css_node_set_name (cssnode, g_value_get_string (value));
break;
case PROP_STATE:
gtk_css_node_set_state (cssnode, g_value_get_flags (value));
break;
case PROP_VISIBLE:
gtk_css_node_set_visible (cssnode, g_value_get_boolean (value));
break;
case PROP_WIDGET_TYPE:
gtk_css_node_set_widget_type (cssnode, g_value_get_gtype (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
gtk_css_node_dispose (GObject *object)
{
GtkCssNode *cssnode = GTK_CSS_NODE (object);
while (cssnode->first_child)
{
gtk_css_node_set_parent (cssnode->first_child, NULL);
}
gtk_css_node_set_invalid (cssnode, FALSE);
G_OBJECT_CLASS (gtk_css_node_parent_class)->dispose (object);
}
static void
gtk_css_node_finalize (GObject *object)
{
GtkCssNode *cssnode = GTK_CSS_NODE (object);
if (cssnode->style)
g_object_unref (cssnode->style);
gtk_css_node_declaration_unref (cssnode->decl);
G_OBJECT_CLASS (gtk_css_node_parent_class)->finalize (object);
}
#define UNPACK_DECLARATION(packed) ((GtkCssNodeDeclaration *) (GPOINTER_TO_SIZE (packed) & ~0x3))
#define UNPACK_FLAGS(packed) (GPOINTER_TO_SIZE (packed) & 0x3)
#define PACK(decl, first_child, last_child) GSIZE_TO_POINTER (GPOINTER_TO_SIZE (decl) | ((first_child) ? 0x2 : 0) | ((last_child) ? 0x1 : 0))
static gboolean
may_use_global_parent_cache (GtkCssNode *node)
{
GtkStyleProviderPrivate *provider;
GtkCssNode *parent;
parent = gtk_css_node_get_parent (node);
if (parent == NULL)
return FALSE;
provider = gtk_css_node_get_style_provider_or_null (node);
if (provider != NULL && provider != gtk_css_node_get_style_provider (parent))
return FALSE;
return TRUE;
}
static GtkCssStyle *
lookup_in_global_parent_cache (GtkCssNode *node,
GtkCssStyle *parent,
const GtkCssNodeDeclaration *decl)
{
GHashTable *cache;
GtkCssStyle *style;
if (parent == NULL ||
!may_use_global_parent_cache (node))
return NULL;
cache = g_object_get_qdata (G_OBJECT (parent), quark_global_cache);
if (cache == NULL)
return NULL;
style = g_hash_table_lookup (cache,
PACK (decl,
gtk_css_node_get_previous_sibling (node) == NULL,
gtk_css_node_get_next_sibling (node) == NULL));
return style;
}
static gboolean
may_be_stored_in_parent_cache (GtkCssStyle *style)
{
GtkCssChange change;
change = gtk_css_static_style_get_change (GTK_CSS_STATIC_STYLE (style));
/* The cache is shared between all children of the parent, so if a
* style depends on a sibling it is not independant of the child.
*/
if (change & GTK_CSS_CHANGE_ANY_SIBLING)
return FALSE;
/* Again, the cache is shared between all children of the parent.
* If the position is relevant, no child has the same style.
*/
if (change & (GTK_CSS_CHANGE_NTH_CHILD | GTK_CSS_CHANGE_NTH_LAST_CHILD))
return FALSE;
return TRUE;
}
static guint
gtk_global_parent_cache_hash (gconstpointer item)
{
return gtk_css_node_declaration_hash (UNPACK_DECLARATION (item)) << 2
| UNPACK_FLAGS (item);
}
static gboolean
gtk_global_parent_cache_equal (gconstpointer item1,
gconstpointer item2)
{
if (UNPACK_FLAGS (item1) != UNPACK_FLAGS (item2))
return FALSE;
return gtk_css_node_declaration_equal (UNPACK_DECLARATION (item1),
UNPACK_DECLARATION (item2));
}
static void
gtk_global_parent_cache_free (gpointer item)
{
gtk_css_node_declaration_unref (UNPACK_DECLARATION (item));
}
static void
store_in_global_parent_cache (GtkCssNode *node,
GtkCssStyle *parent,
const GtkCssNodeDeclaration *decl,
GtkCssStyle *style)
{
GHashTable *cache;
g_assert (GTK_IS_CSS_STATIC_STYLE (style));
if (parent == NULL ||
!may_use_global_parent_cache (node))
return;
if (!may_be_stored_in_parent_cache (style))
return;
cache = g_object_get_qdata (G_OBJECT (parent), quark_global_cache);
if (cache == NULL)
{
cache = g_hash_table_new_full (gtk_global_parent_cache_hash,
gtk_global_parent_cache_equal,
gtk_global_parent_cache_free,
g_object_unref);
g_object_set_qdata_full (G_OBJECT (parent),
quark_global_cache,
cache,
(GDestroyNotify) g_hash_table_destroy);
}
g_hash_table_insert (cache,
PACK (gtk_css_node_declaration_ref ((GtkCssNodeDeclaration *) decl),
gtk_css_node_get_previous_sibling (node) == NULL,
gtk_css_node_get_next_sibling (node) == NULL),
g_object_ref (style));
}
static GtkCssStyle *
gtk_css_node_create_style (GtkCssNode *cssnode)
{
const GtkCssNodeDeclaration *decl;
GtkCssMatcher matcher;
GtkCssStyle *parent;
GtkCssStyle *style;
decl = gtk_css_node_get_declaration (cssnode);
parent = cssnode->parent ? cssnode->parent->style : NULL;
style = lookup_in_global_parent_cache (cssnode, parent, decl);
if (style)
return g_object_ref (style);
if (gtk_css_node_init_matcher (cssnode, &matcher))
style = gtk_css_static_style_new_compute (gtk_css_node_get_style_provider (cssnode),
&matcher,
parent);
else
style = gtk_css_static_style_new_compute (gtk_css_node_get_style_provider (cssnode),
NULL,
parent);
store_in_global_parent_cache (cssnode, parent, decl, style);
return style;
}
static gboolean
should_create_transitions (GtkCssChange change)
{
return (change & GTK_CSS_CHANGE_ANIMATIONS) == 0;
}
static gboolean
gtk_css_style_needs_recreation (GtkCssStyle *style,
GtkCssChange change)
{
/* Try to avoid invalidating if we can */
if (change & GTK_CSS_RADICAL_CHANGE)
return TRUE;
if (GTK_IS_CSS_ANIMATED_STYLE (style))
style = GTK_CSS_ANIMATED_STYLE (style)->style;
if (gtk_css_static_style_get_change (GTK_CSS_STATIC_STYLE (style)) & change)
return TRUE;
else
return FALSE;
}
static GtkCssStyle *
gtk_css_node_real_update_style (GtkCssNode *cssnode,
GtkCssChange change,
gint64 timestamp,
GtkCssStyle *style)
{
GtkCssStyle *static_style, *new_static_style, *new_style;
if (GTK_IS_CSS_ANIMATED_STYLE (style))
{
static_style = GTK_CSS_ANIMATED_STYLE (style)->style;
}
else
{
static_style = style;
}
if (gtk_css_style_needs_recreation (static_style, change))
new_static_style = gtk_css_node_create_style (cssnode);
else
new_static_style = g_object_ref (static_style);
if (new_static_style != static_style || (change & GTK_CSS_CHANGE_ANIMATIONS))
{
GtkCssNode *parent = gtk_css_node_get_parent (cssnode);
new_style = gtk_css_animated_style_new (new_static_style,
parent ? gtk_css_node_get_style (parent) : NULL,
timestamp,
gtk_css_node_get_style_provider (cssnode),
should_create_transitions (change) ? style : NULL);
}
else if (static_style != style && (change & GTK_CSS_CHANGE_TIMESTAMP))
{
new_style = gtk_css_animated_style_new_advance (GTK_CSS_ANIMATED_STYLE (style),
static_style,
timestamp);
}
else
{
new_style = g_object_ref (style);
}
if (!gtk_css_style_is_static (new_style))
gtk_css_node_set_invalid (cssnode, TRUE);
g_object_unref (new_static_style);
return new_style;
}
static void
gtk_css_node_real_invalidate (GtkCssNode *node)
{
}
static void
gtk_css_node_real_queue_validate (GtkCssNode *node)
{
}
static void
gtk_css_node_real_dequeue_validate (GtkCssNode *node)
{
}
static void
gtk_css_node_real_validate (GtkCssNode *node)
{
}
gboolean
gtk_css_node_real_init_matcher (GtkCssNode *cssnode,
GtkCssMatcher *matcher)
{
_gtk_css_matcher_node_init (matcher, cssnode);
return TRUE;
}
static GtkWidgetPath *
gtk_css_node_real_create_widget_path (GtkCssNode *cssnode)
{
return gtk_widget_path_new ();
}
static const GtkWidgetPath *
gtk_css_node_real_get_widget_path (GtkCssNode *cssnode)
{
return NULL;
}
static GtkStyleProviderPrivate *
gtk_css_node_real_get_style_provider (GtkCssNode *cssnode)
{
return NULL;
}
static GdkFrameClock *
gtk_css_node_real_get_frame_clock (GtkCssNode *cssnode)
{
return NULL;
}
static void
gtk_css_node_real_node_removed (GtkCssNode *parent,
GtkCssNode *node,
GtkCssNode *previous)
{
if (node->previous_sibling)
node->previous_sibling->next_sibling = node->next_sibling;
else
node->parent->first_child = node->next_sibling;
if (node->next_sibling)
node->next_sibling->previous_sibling = node->previous_sibling;
else
node->parent->last_child = node->previous_sibling;
node->previous_sibling = NULL;
node->next_sibling = NULL;
node->parent = NULL;
}
static void
gtk_css_node_real_node_added (GtkCssNode *parent,
GtkCssNode *node,
GtkCssNode *new_previous)
{
if (new_previous)
{
node->previous_sibling = new_previous;
node->next_sibling = new_previous->next_sibling;
new_previous->next_sibling = node;
}
else
{
node->next_sibling = parent->first_child;
parent->first_child = node;
}
if (node->next_sibling)
node->next_sibling->previous_sibling = node;
else
parent->last_child = node;
node->parent = parent;
}
static void
gtk_css_node_real_style_changed (GtkCssNode *cssnode,
GtkCssStyleChange *change)
{
g_object_unref (cssnode->style);
cssnode->style = g_object_ref (gtk_css_style_change_get_new_style (change));
}
static void
gtk_css_node_class_init (GtkCssNodeClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
quark_global_cache = g_quark_from_static_string ("gtk-global-cache");
object_class->get_property = gtk_css_node_get_property;
object_class->set_property = gtk_css_node_set_property;
object_class->dispose = gtk_css_node_dispose;
object_class->finalize = gtk_css_node_finalize;
klass->update_style = gtk_css_node_real_update_style;
klass->invalidate = gtk_css_node_real_invalidate;
klass->validate = gtk_css_node_real_validate;
klass->queue_validate = gtk_css_node_real_queue_validate;
klass->dequeue_validate = gtk_css_node_real_dequeue_validate;
klass->init_matcher = gtk_css_node_real_init_matcher;
klass->create_widget_path = gtk_css_node_real_create_widget_path;
klass->get_widget_path = gtk_css_node_real_get_widget_path;
klass->get_style_provider = gtk_css_node_real_get_style_provider;
klass->get_frame_clock = gtk_css_node_real_get_frame_clock;
klass->node_added = gtk_css_node_real_node_added;
klass->node_removed = gtk_css_node_real_node_removed;
klass->style_changed = gtk_css_node_real_style_changed;
cssnode_signals[NODE_ADDED] =
g_signal_new (I_("node-added"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCssNodeClass, node_added),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2,
GTK_TYPE_CSS_NODE, GTK_TYPE_CSS_NODE);
cssnode_signals[NODE_REMOVED] =
g_signal_new (I_("node-removed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCssNodeClass, node_removed),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2,
GTK_TYPE_CSS_NODE, GTK_TYPE_CSS_NODE);
cssnode_signals[STYLE_CHANGED] =
g_signal_new (I_("style-changed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCssNodeClass, style_changed),
NULL, NULL,
_gtk_marshal_VOID__POINTER,
G_TYPE_NONE, 1,
G_TYPE_POINTER);
cssnode_properties[PROP_CLASSES] =
g_param_spec_boxed ("classes", "Classes",
"List of classes",
G_TYPE_STRV,
G_PARAM_READWRITE
| G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
cssnode_properties[PROP_ID] =
g_param_spec_string ("id", "ID",
"Unique ID",
NULL,
G_PARAM_READWRITE
| G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
cssnode_properties[PROP_NAME] =
g_param_spec_string ("name", "Name",
"Name identifying the type of node",
NULL,
G_PARAM_READWRITE
| G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
cssnode_properties[PROP_STATE] =
g_param_spec_flags ("state", "State",
"State flags",
GTK_TYPE_STATE_FLAGS,
0,
G_PARAM_READWRITE
| G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
cssnode_properties[PROP_VISIBLE] =
g_param_spec_boolean ("visible", "Visible",
"If other nodes can see this node",
TRUE,
G_PARAM_READWRITE
| G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
cssnode_properties[PROP_WIDGET_TYPE] =
g_param_spec_gtype ("widget-type", "Widget type",
"GType of the widget",
G_TYPE_NONE,
G_PARAM_READWRITE
| G_PARAM_EXPLICIT_NOTIFY | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (object_class, NUM_PROPERTIES, cssnode_properties);
}
static void
gtk_css_node_init (GtkCssNode *cssnode)
{
cssnode->decl = gtk_css_node_declaration_new ();
cssnode->style = g_object_ref (gtk_css_static_style_get_default ());
cssnode->visible = TRUE;
}
/**
* gtk_css_node_new:
*
* Creates a new CSS node.
*
* Returns: (transfer full): the new CSS node
*/
GtkCssNode *
gtk_css_node_new (void)
{
return g_object_new (GTK_TYPE_CSS_NODE, NULL);
}
static GdkFrameClock *
gtk_css_node_get_frame_clock_or_null (GtkCssNode *cssnode)
{
while (cssnode->parent)
cssnode = cssnode->parent;
return GTK_CSS_NODE_GET_CLASS (cssnode)->get_frame_clock (cssnode);
}
static gint64
gtk_css_node_get_timestamp (GtkCssNode *cssnode)
{
GdkFrameClock *frameclock;
frameclock = gtk_css_node_get_frame_clock_or_null (cssnode);
if (frameclock == NULL)
return 0;
return gdk_frame_clock_get_frame_time (frameclock);
}
static void
gtk_css_node_parent_was_unset (GtkCssNode *node)
{
if (node->invalid)
GTK_CSS_NODE_GET_CLASS (node)->queue_validate (node);
}
static void
gtk_css_node_parent_will_be_set (GtkCssNode *node)
{
if (node->invalid)
GTK_CSS_NODE_GET_CLASS (node)->dequeue_validate (node);
}
static void
gtk_css_node_invalidate_style (GtkCssNode *cssnode)
{
if (cssnode->style_is_invalid)
return;
cssnode->style_is_invalid = TRUE;
gtk_css_node_set_invalid (cssnode, TRUE);
if (cssnode->first_child)
gtk_css_node_invalidate_style (cssnode->first_child);
if (cssnode->next_sibling)
gtk_css_node_invalidate_style (cssnode->next_sibling);
}
static void
gtk_css_node_reposition (GtkCssNode *node,
GtkCssNode *new_parent,
GtkCssNode *previous)
{
GtkCssNode *old_parent;
g_assert (! (new_parent == NULL && previous != NULL));
old_parent = node->parent;
/* Take a reference here so the whole function has a reference */
g_object_ref (node);
if (node->visible)
{
if (node->next_sibling)
gtk_css_node_invalidate (node->next_sibling,
GTK_CSS_CHANGE_ANY_SIBLING
| GTK_CSS_CHANGE_NTH_CHILD
| (node->previous_sibling ? 0 : GTK_CSS_CHANGE_FIRST_CHILD));
else if (node->previous_sibling)
gtk_css_node_invalidate (node->previous_sibling, GTK_CSS_CHANGE_LAST_CHILD);
}
if (old_parent != NULL)
{
g_signal_emit (old_parent, cssnode_signals[NODE_REMOVED], 0, node, node->previous_sibling);
if (old_parent->first_child && node->visible)
gtk_css_node_invalidate (old_parent->first_child, GTK_CSS_CHANGE_NTH_LAST_CHILD);
}
if (old_parent != new_parent)
{
if (old_parent == NULL)
{
gtk_css_node_parent_will_be_set (node);
}
else
{
g_object_unref (node);
}
if (gtk_css_node_get_style_provider_or_null (node) == NULL)
gtk_css_node_invalidate_style_provider (node);
gtk_css_node_invalidate (node, GTK_CSS_CHANGE_TIMESTAMP | GTK_CSS_CHANGE_ANIMATIONS);
if (new_parent)
{
g_object_ref (node);
if (node->pending_changes)
new_parent->needs_propagation = TRUE;
if (node->invalid && node->visible)
gtk_css_node_set_invalid (new_parent, TRUE);
}
else
{
gtk_css_node_parent_was_unset (node);
}
}
if (new_parent)
{
g_signal_emit (new_parent, cssnode_signals[NODE_ADDED], 0, node, previous);
if (node->visible)
gtk_css_node_invalidate (new_parent->first_child, GTK_CSS_CHANGE_NTH_LAST_CHILD);
}
if (node->visible)
{
if (node->next_sibling)
{
if (node->previous_sibling == NULL)
gtk_css_node_invalidate (node->next_sibling, GTK_CSS_CHANGE_FIRST_CHILD);
else
gtk_css_node_invalidate_style (node->next_sibling);
}
else if (node->previous_sibling)
{
gtk_css_node_invalidate (node->previous_sibling, GTK_CSS_CHANGE_LAST_CHILD);
}
}
else
{
if (node->next_sibling)
gtk_css_node_invalidate_style (node->next_sibling);
}
gtk_css_node_invalidate (node, GTK_CSS_CHANGE_ANY_PARENT
| GTK_CSS_CHANGE_ANY_SIBLING
| GTK_CSS_CHANGE_NTH_CHILD
| (node->previous_sibling ? 0 : GTK_CSS_CHANGE_FIRST_CHILD)
| (node->next_sibling ? 0 : GTK_CSS_CHANGE_LAST_CHILD));
g_object_unref (node);
}
void
gtk_css_node_set_parent (GtkCssNode *node,
GtkCssNode *parent)
{
if (node->parent == parent)
return;
gtk_css_node_reposition (node, parent, parent ? parent->last_child : NULL);
}
/* If previous_sibling is NULL, insert at the beginning */
void
gtk_css_node_insert_after (GtkCssNode *parent,
GtkCssNode *cssnode,
GtkCssNode *previous_sibling)
{
g_return_if_fail (previous_sibling == NULL || previous_sibling->parent == parent);
if (cssnode->previous_sibling == previous_sibling &&
cssnode->parent == parent)
return;
gtk_css_node_reposition (cssnode,
parent,
previous_sibling);
}
/* If next_sibling is NULL, insert at the end */
void
gtk_css_node_insert_before (GtkCssNode *parent,
GtkCssNode *cssnode,
GtkCssNode *next_sibling)
{
g_return_if_fail (next_sibling == NULL || next_sibling->parent == parent);
if (cssnode->next_sibling == next_sibling &&
cssnode->parent == parent)
return;
gtk_css_node_reposition (cssnode,
parent,
next_sibling ? next_sibling->previous_sibling : parent->last_child);
}
void
gtk_css_node_reverse_children (GtkCssNode *cssnode)
{
GtkCssNode *end;
end = cssnode->last_child;
while (cssnode->first_child != end)
{
gtk_css_node_reposition (cssnode->first_child,
cssnode,
end);
}
}
GtkCssNode *
gtk_css_node_get_parent (GtkCssNode *cssnode)
{
return cssnode->parent;
}
GtkCssNode *
gtk_css_node_get_first_child (GtkCssNode *cssnode)
{
return cssnode->first_child;
}
GtkCssNode *
gtk_css_node_get_last_child (GtkCssNode *cssnode)
{
return cssnode->last_child;
}
GtkCssNode *
gtk_css_node_get_previous_sibling (GtkCssNode *cssnode)
{
return cssnode->previous_sibling;
}
GtkCssNode *
gtk_css_node_get_next_sibling (GtkCssNode *cssnode)
{
return cssnode->next_sibling;
}
static gboolean
gtk_css_node_set_style (GtkCssNode *cssnode,
GtkCssStyle *style)
{
GtkCssStyleChange change;
gboolean style_changed;
if (cssnode->style == style)
return FALSE;
gtk_css_style_change_init (&change, cssnode->style, style);
style_changed = gtk_css_style_change_has_change (&change);
if (style_changed)
{
g_signal_emit (cssnode, cssnode_signals[STYLE_CHANGED], 0, &change);
}
else if (cssnode->style != style &&
(GTK_IS_CSS_ANIMATED_STYLE (cssnode->style) || GTK_IS_CSS_ANIMATED_STYLE (style)))
{
/* This is when animations are starting/stopping but they didn't change any CSS this frame */
g_object_unref (cssnode->style);
cssnode->style = g_object_ref (style);
}
gtk_css_style_change_finish (&change);
return style_changed;
}
static void
gtk_css_node_propagate_pending_changes (GtkCssNode *cssnode,
gboolean style_changed)
{
GtkCssChange change, child_change;
GtkCssNode *child;
change = _gtk_css_change_for_child (cssnode->pending_changes);
if (style_changed)
change |= GTK_CSS_CHANGE_PARENT_STYLE;
if (!cssnode->needs_propagation && change == 0)
return;
for (child = gtk_css_node_get_first_child (cssnode);
child;
child = gtk_css_node_get_next_sibling (child))
{
child_change = child->pending_changes;
gtk_css_node_invalidate (child, change);
if (child->visible)
change |= _gtk_css_change_for_sibling (child_change);
}
cssnode->needs_propagation = FALSE;
}
static gboolean
gtk_css_node_needs_new_style (GtkCssNode *cssnode)
{
return cssnode->style_is_invalid || cssnode->needs_propagation;
}
static void
gtk_css_node_ensure_style (GtkCssNode *cssnode,
gint64 current_time)
{
gboolean style_changed;
if (!gtk_css_node_needs_new_style (cssnode))
return;
if (cssnode->parent)
gtk_css_node_ensure_style (cssnode->parent, current_time);
if (cssnode->style_is_invalid)
{
GtkCssStyle *new_style;
if (cssnode->previous_sibling)
gtk_css_node_ensure_style (cssnode->previous_sibling, current_time);
new_style = GTK_CSS_NODE_GET_CLASS (cssnode)->update_style (cssnode,
cssnode->pending_changes,
current_time,
cssnode->style);
style_changed = gtk_css_node_set_style (cssnode, new_style);
g_object_unref (new_style);
if (!style_changed && (cssnode->pending_changes & GTK_CSS_CHANGE_SOURCE))
{
/* clear the global cache if we reuse the same style after the CSS changed */
g_object_set_qdata (G_OBJECT (cssnode->style), quark_global_cache, NULL);
}
}
else
{
style_changed = FALSE;
}
gtk_css_node_propagate_pending_changes (cssnode, style_changed);
cssnode->pending_changes = 0;
cssnode->style_is_invalid = FALSE;
}
GtkCssStyle *
gtk_css_node_get_style (GtkCssNode *cssnode)
{
if (gtk_css_node_needs_new_style (cssnode))
{
gint64 timestamp = gtk_css_node_get_timestamp (cssnode);
gtk_css_node_ensure_style (cssnode, timestamp);
}
return cssnode->style;
}
void
gtk_css_node_set_visible (GtkCssNode *cssnode,
gboolean visible)
{
if (cssnode->visible == visible)
return;
cssnode->visible = visible;
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_VISIBLE]);
if (cssnode->invalid)
{
if (cssnode->visible)
{
if (cssnode->parent)
gtk_css_node_set_invalid (cssnode->parent, TRUE);
else
GTK_CSS_NODE_GET_CLASS (cssnode)->queue_validate (cssnode);
}
else
{
if (cssnode->parent == NULL)
GTK_CSS_NODE_GET_CLASS (cssnode)->dequeue_validate (cssnode);
}
}
if (cssnode->next_sibling)
gtk_css_node_invalidate (cssnode->next_sibling, GTK_CSS_CHANGE_ANY_SIBLING
| GTK_CSS_CHANGE_NTH_CHILD
| (cssnode->previous_sibling ? 0 : GTK_CSS_CHANGE_FIRST_CHILD));
if (cssnode->previous_sibling)
{
if (cssnode->next_sibling)
gtk_css_node_invalidate (cssnode->previous_sibling, GTK_CSS_CHANGE_LAST_CHILD);
gtk_css_node_invalidate (cssnode->parent->first_child, GTK_CSS_CHANGE_NTH_LAST_CHILD);
}
}
gboolean
gtk_css_node_get_visible (GtkCssNode *cssnode)
{
return cssnode->visible;
}
void
gtk_css_node_set_name (GtkCssNode *cssnode,
/*interned*/ const char *name)
{
if (gtk_css_node_declaration_set_name (&cssnode->decl, name))
{
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_NAME);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_NAME]);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_WIDGET_TYPE]);
}
}
/* interned */ const char *
gtk_css_node_get_name (GtkCssNode *cssnode)
{
return gtk_css_node_declaration_get_name (cssnode->decl);
}
void
gtk_css_node_set_widget_type (GtkCssNode *cssnode,
GType widget_type)
{
if (gtk_css_node_declaration_set_type (&cssnode->decl, widget_type))
{
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_NAME);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_NAME]);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_WIDGET_TYPE]);
}
}
GType
gtk_css_node_get_widget_type (GtkCssNode *cssnode)
{
return gtk_css_node_declaration_get_type (cssnode->decl);
}
void
gtk_css_node_set_id (GtkCssNode *cssnode,
/* interned */ const char *id)
{
if (gtk_css_node_declaration_set_id (&cssnode->decl, id))
{
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_ID);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_ID]);
}
}
/* interned */ const char *
gtk_css_node_get_id (GtkCssNode *cssnode)
{
return gtk_css_node_declaration_get_id (cssnode->decl);
}
void
gtk_css_node_set_state (GtkCssNode *cssnode,
GtkStateFlags state_flags)
{
if (gtk_css_node_declaration_set_state (&cssnode->decl, state_flags))
{
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_STATE);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_STATE]);
}
}
GtkStateFlags
gtk_css_node_get_state (GtkCssNode *cssnode)
{
return gtk_css_node_declaration_get_state (cssnode->decl);
}
void
gtk_css_node_set_junction_sides (GtkCssNode *cssnode,
GtkJunctionSides junction_sides)
{
gtk_css_node_declaration_set_junction_sides (&cssnode->decl, junction_sides);
}
GtkJunctionSides
gtk_css_node_get_junction_sides (GtkCssNode *cssnode)
{
return gtk_css_node_declaration_get_junction_sides (cssnode->decl);
}
static void
gtk_css_node_clear_classes (GtkCssNode *cssnode)
{
if (gtk_css_node_declaration_clear_classes (&cssnode->decl))
{
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_CLASS);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_CLASSES]);
}
}
void
gtk_css_node_set_classes (GtkCssNode *cssnode,
const char **classes)
{
guint i;
g_object_freeze_notify (G_OBJECT (cssnode));
gtk_css_node_clear_classes (cssnode);
if (classes)
{
for (i = 0; classes[i] != NULL; i++)
{
gtk_css_node_add_class (cssnode, g_quark_from_string (classes[i]));
}
}
g_object_thaw_notify (G_OBJECT (cssnode));
}
char **
gtk_css_node_get_classes (GtkCssNode *cssnode)
{
const GQuark *classes;
char **result;
guint n_classes, i, j;
classes = gtk_css_node_declaration_get_classes (cssnode->decl, &n_classes);
result = g_new (char *, n_classes + 1);
for (i = n_classes, j = 0; i-- > 0; ++j)
{
result[j] = g_strdup (g_quark_to_string (classes[i]));
}
result[n_classes] = NULL;
return result;
}
void
gtk_css_node_add_class (GtkCssNode *cssnode,
GQuark style_class)
{
if (gtk_css_node_declaration_add_class (&cssnode->decl, style_class))
{
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_CLASS);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_CLASSES]);
}
}
void
gtk_css_node_remove_class (GtkCssNode *cssnode,
GQuark style_class)
{
if (gtk_css_node_declaration_remove_class (&cssnode->decl, style_class))
{
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_CLASS);
g_object_notify_by_pspec (G_OBJECT (cssnode), cssnode_properties[PROP_CLASSES]);
}
}
gboolean
gtk_css_node_has_class (GtkCssNode *cssnode,
GQuark style_class)
{
return gtk_css_node_declaration_has_class (cssnode->decl, style_class);
}
const GQuark *
gtk_css_node_list_classes (GtkCssNode *cssnode,
guint *n_classes)
{
return gtk_css_node_declaration_get_classes (cssnode->decl, n_classes);
}
void
gtk_css_node_add_region (GtkCssNode *cssnode,
GQuark region,
GtkRegionFlags flags)
{
gtk_css_node_declaration_add_region (&cssnode->decl, region, flags);
}
void
gtk_css_node_remove_region (GtkCssNode *cssnode,
GQuark region)
{
gtk_css_node_declaration_remove_region (&cssnode->decl, region);
}
gboolean
gtk_css_node_has_region (GtkCssNode *cssnode,
GQuark region,
GtkRegionFlags *out_flags)
{
return gtk_css_node_declaration_has_region (cssnode->decl, region, out_flags);
}
GList *
gtk_css_node_list_regions (GtkCssNode *cssnode)
{
return gtk_css_node_declaration_list_regions (cssnode->decl);
}
const GtkCssNodeDeclaration *
gtk_css_node_get_declaration (GtkCssNode *cssnode)
{
return cssnode->decl;
}
void
gtk_css_node_invalidate_style_provider (GtkCssNode *cssnode)
{
GtkCssNode *child;
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_SOURCE);
for (child = cssnode->first_child;
child;
child = child->next_sibling)
{
if (gtk_css_node_get_style_provider_or_null (child) == NULL)
gtk_css_node_invalidate_style_provider (child);
}
}
static void
gtk_css_node_invalidate_timestamp (GtkCssNode *cssnode)
{
GtkCssNode *child;
if (!cssnode->invalid)
return;
if (!gtk_css_style_is_static (cssnode->style))
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_TIMESTAMP);
for (child = cssnode->first_child; child; child = child->next_sibling)
{
gtk_css_node_invalidate_timestamp (child);
}
}
void
gtk_css_node_invalidate_frame_clock (GtkCssNode *cssnode,
gboolean just_timestamp)
{
/* frame clock is handled by the top level */
if (cssnode->parent)
return;
gtk_css_node_invalidate_timestamp (cssnode);
if (!just_timestamp)
gtk_css_node_invalidate (cssnode, GTK_CSS_CHANGE_ANIMATIONS);
}
void
gtk_css_node_invalidate (GtkCssNode *cssnode,
GtkCssChange change)
{
if (!cssnode->invalid)
change &= ~GTK_CSS_CHANGE_TIMESTAMP;
if (change == 0)
return;
cssnode->pending_changes |= change;
GTK_CSS_NODE_GET_CLASS (cssnode)->invalidate (cssnode);
if (cssnode->parent)
cssnode->parent->needs_propagation = TRUE;
gtk_css_node_invalidate_style (cssnode);
}
void
gtk_css_node_validate_internal (GtkCssNode *cssnode,
gint64 timestamp)
{
GtkCssNode *child;
/* If you run your application with
* GTK_DEBUG=no-css-cache
* every invalidation will purge the cache and completely query
* everything anew form the cache. This is slow (in particular
* when animating), but useful for figuring out bugs.
*
* We achieve that by pretending that everything that could have
* changed has and so we of course totally need to redo everything.
*
* Note that this also completely revalidates child widgets all
* the time.
*/
#ifdef G_ENABLE_DEBUG
if (GTK_DEBUG_CHECK (NO_CSS_CACHE))
cssnode->pending_changes |= GTK_CSS_CHANGE_ANY;
#endif
if (!cssnode->invalid)
return;
gtk_css_node_ensure_style (cssnode, timestamp);
/* need to set to FALSE then to TRUE here to make it chain up */
gtk_css_node_set_invalid (cssnode, FALSE);
if (!gtk_css_style_is_static (cssnode->style))
gtk_css_node_set_invalid (cssnode, TRUE);
GTK_CSS_NODE_GET_CLASS (cssnode)->validate (cssnode);
for (child = gtk_css_node_get_first_child (cssnode);
child;
child = gtk_css_node_get_next_sibling (child))
{
if (child->visible)
gtk_css_node_validate_internal (child, timestamp);
}
}
void
gtk_css_node_validate (GtkCssNode *cssnode)
{
gint64 timestamp;
timestamp = gtk_css_node_get_timestamp (cssnode);
gtk_css_node_validate_internal (cssnode, timestamp);
}
gboolean
gtk_css_node_init_matcher (GtkCssNode *cssnode,
GtkCssMatcher *matcher)
{
return GTK_CSS_NODE_GET_CLASS (cssnode)->init_matcher (cssnode, matcher);
}
GtkWidgetPath *
gtk_css_node_create_widget_path (GtkCssNode *cssnode)
{
return GTK_CSS_NODE_GET_CLASS (cssnode)->create_widget_path (cssnode);
}
const GtkWidgetPath *
gtk_css_node_get_widget_path (GtkCssNode *cssnode)
{
return GTK_CSS_NODE_GET_CLASS (cssnode)->get_widget_path (cssnode);
}
GtkStyleProviderPrivate *
gtk_css_node_get_style_provider (GtkCssNode *cssnode)
{
GtkStyleProviderPrivate *result;
result = gtk_css_node_get_style_provider_or_null (cssnode);
if (result)
return result;
if (cssnode->parent)
return gtk_css_node_get_style_provider (cssnode->parent);
return GTK_STYLE_PROVIDER_PRIVATE (_gtk_settings_get_style_cascade (gtk_settings_get_default (), 1));
}
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