[gtk+] stylecontext: Add GtkCssAnimatedValues
- From: Benjamin Otte <otte src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk+] stylecontext: Add GtkCssAnimatedValues
- Date: Tue, 17 Apr 2012 07:22:24 +0000 (UTC)
commit 632a84af8c156954efc4c851246401a4560e8321
Author: Benjamin Otte <otte redhat com>
Date: Wed Apr 11 16:15:45 2012 +0200
stylecontext: Add GtkCssAnimatedValues
This is a GtkCssComputedValues subclass. So it's essentially a store for
computed CSS values. But it can be animated by advancing it to a certain
timestamp.
gtk/Makefile.am | 2 +
gtk/gtkcssanimatedvalues.c | 307 +++++++++++++++++++++++++++++++++++++
gtk/gtkcssanimatedvaluesprivate.h | 64 ++++++++
3 files changed, 373 insertions(+), 0 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index c5a2faa..e31feb2 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -422,6 +422,7 @@ gtk_private_h_sources = \
gtkcolorscaleprivate.h \
gtkcolorchooserprivate.h \
gtkcontainerprivate.h \
+ gtkcssanimatedvaluesprivate.h \
gtkcssarrayvalueprivate.h \
gtkcssbgsizevalueprivate.h \
gtkcssbordervalueprivate.h \
@@ -637,6 +638,7 @@ gtk_base_c_sources = \
gtkcombobox.c \
gtkcomboboxtext.c \
gtkcontainer.c \
+ gtkcssanimatedvalues.c \
gtkcssarrayvalue.c \
gtkcssbgsizevalue.c \
gtkcssbordervalue.c \
diff --git a/gtk/gtkcssanimatedvalues.c b/gtk/gtkcssanimatedvalues.c
new file mode 100644
index 0000000..c5e4e3b
--- /dev/null
+++ b/gtk/gtkcssanimatedvalues.c
@@ -0,0 +1,307 @@
+/*
+ * Copyright  2012 Red Hat Inc.
+ *
+ * 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 2.1 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/>.
+ *
+ * Authors: Benjamin Otte <otte gnome org>
+ */
+
+#include "config.h"
+
+#include "gtkcssanimatedvaluesprivate.h"
+
+#include "gtkcssarrayvalueprivate.h"
+#include "gtkcssnumbervalueprivate.h"
+#include "gtkcssshorthandpropertyprivate.h"
+#include "gtkcssstringvalueprivate.h"
+#include "gtkcssstylepropertyprivate.h"
+#include "gtkcsstransitionprivate.h"
+#include "gtkstyleanimationprivate.h"
+#include "gtkstylepropertyprivate.h"
+
+G_DEFINE_TYPE (GtkCssAnimatedValues, _gtk_css_animated_values, GTK_TYPE_CSS_COMPUTED_VALUES)
+
+static void
+gtk_css_animated_values_dispose (GObject *object)
+{
+ GtkCssAnimatedValues *values = GTK_CSS_ANIMATED_VALUES (object);
+
+ g_clear_object (&values->computed);
+ g_slist_free_full (values->animations, g_object_unref);
+ values->animations = NULL;
+
+ G_OBJECT_CLASS (_gtk_css_animated_values_parent_class)->dispose (object);
+}
+
+static void
+_gtk_css_animated_values_class_init (GtkCssAnimatedValuesClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+ object_class->dispose = gtk_css_animated_values_dispose;
+}
+
+static void
+_gtk_css_animated_values_init (GtkCssAnimatedValues *animated_values)
+{
+}
+
+/* TRANSITIONS */
+
+typedef struct _TransitionInfo TransitionInfo;
+struct _TransitionInfo {
+ guint index; /* index into value arrays */
+ gboolean pending; /* TRUE if we still need to handle it */
+};
+
+static void
+transition_info_add (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
+ GtkStyleProperty *property,
+ guint index)
+{
+ if (property == NULL)
+ {
+ guint i;
+
+ for (i = 0; i < _gtk_css_style_property_get_n_properties (); i++)
+ {
+ GtkCssStyleProperty *prop = _gtk_css_style_property_lookup_by_id (i);
+
+ transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
+ }
+ }
+ else if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
+ {
+ GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
+ guint i;
+
+ for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
+ {
+ GtkCssStyleProperty *prop = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
+
+ transition_info_add (infos, GTK_STYLE_PROPERTY (prop), index);
+ }
+ }
+ else if (GTK_IS_CSS_STYLE_PROPERTY (property))
+ {
+ guint id;
+
+ if (!_gtk_css_style_property_is_animated (GTK_CSS_STYLE_PROPERTY (property)))
+ return;
+
+ id = _gtk_css_style_property_get_id (GTK_CSS_STYLE_PROPERTY (property));
+ g_assert (id < GTK_CSS_PROPERTY_N_PROPERTIES);
+ infos[id].index = index;
+ infos[id].pending = TRUE;
+ }
+ else
+ {
+ g_assert_not_reached ();
+ }
+}
+
+static void
+transition_infos_set (TransitionInfo infos[GTK_CSS_PROPERTY_N_PROPERTIES],
+ GtkCssValue *transitions)
+{
+ guint i;
+
+ for (i = 0; i < _gtk_css_array_value_get_n_values (transitions); i++)
+ {
+ GtkStyleProperty *property;
+ GtkCssValue *prop_value;
+
+ prop_value = _gtk_css_array_value_get_nth (transitions, i);
+ if (g_ascii_strcasecmp (_gtk_css_ident_value_get (prop_value), "all") == 0)
+ property = NULL;
+ else
+ {
+ property = _gtk_style_property_lookup (_gtk_css_ident_value_get (prop_value));
+ if (property == NULL)
+ continue;
+ }
+
+ transition_info_add (infos, property, i);
+ }
+}
+
+static GtkStyleAnimation *
+gtk_css_animated_values_find_transition (GtkCssAnimatedValues *values,
+ guint property_id)
+{
+ GSList *list;
+
+ for (list = values->animations; list; list = list->next)
+ {
+ if (!GTK_IS_CSS_TRANSITION (list->data))
+ continue;
+
+ if (_gtk_css_transition_get_property (list->data) == property_id)
+ return list->data;
+ }
+
+ return NULL;
+}
+
+static void
+gtk_css_animated_values_start_transitions (GtkCssAnimatedValues *values,
+ gint64 timestamp,
+ GtkCssComputedValues *source)
+{
+ TransitionInfo transitions[GTK_CSS_PROPERTY_N_PROPERTIES] = { { 0, } };
+ GtkCssComputedValues *source_computed, *computed;
+ GtkCssValue *durations, *delays, *timing_functions;
+ guint i;
+
+ computed = GTK_CSS_COMPUTED_VALUES (values);
+ if (GTK_IS_CSS_ANIMATED_VALUES (source))
+ source_computed = GTK_CSS_ANIMATED_VALUES (source)->computed;
+ else
+ source_computed = source;
+
+ transition_infos_set (transitions, _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_PROPERTY));
+
+ durations = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_DURATION);
+ delays = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_DELAY);
+ timing_functions = _gtk_css_computed_values_get_value (computed, GTK_CSS_PROPERTY_TRANSITION_TIMING_FUNCTION);
+
+
+ for (i = 0; i < GTK_CSS_PROPERTY_N_PROPERTIES; i++)
+ {
+ GtkStyleAnimation *animation;
+ GtkCssValue *start, *end;
+ double duration, delay;
+
+ if (!transitions[i].pending)
+ continue;
+
+ duration = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (durations, transitions[i].index), 100);
+ delay = _gtk_css_number_value_get (_gtk_css_array_value_get_nth (delays, transitions[i].index), 100);
+ if (duration + delay == 0.0)
+ continue;
+
+ start = _gtk_css_computed_values_get_value (source_computed, i);
+ end = _gtk_css_computed_values_get_value (values->computed, i);
+ if (_gtk_css_value_equal (start, end))
+ {
+ if (GTK_IS_CSS_ANIMATED_VALUES (source))
+ {
+ animation = gtk_css_animated_values_find_transition (GTK_CSS_ANIMATED_VALUES (source), i);
+ if (animation)
+ values->animations = g_slist_prepend (values->animations, g_object_ref (animation));
+ }
+ }
+ else
+ {
+ animation = _gtk_css_transition_new (i,
+ start,
+ end,
+ _gtk_css_array_value_get_nth (timing_functions, i),
+ timestamp + delay * G_USEC_PER_SEC,
+ timestamp + (delay + duration) * G_USEC_PER_SEC);
+ values->animations = g_slist_prepend (values->animations, animation);
+ }
+ }
+}
+
+/* PUBLIC API */
+
+static void
+gtk_css_animated_values_start_animations (GtkCssAnimatedValues *values,
+ gint64 timestamp,
+ GtkCssComputedValues *source)
+{
+ gtk_css_animated_values_start_transitions (values, timestamp, source);
+}
+
+GtkCssComputedValues *
+_gtk_css_animated_values_new (GtkCssComputedValues *computed,
+ GtkCssComputedValues *source,
+ gint64 timestamp)
+{
+ GtkCssAnimatedValues *values;
+ GtkCssValue *value;
+ GtkBitmask *ignore;
+ guint i;
+
+ g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (computed), NULL);
+ g_return_val_if_fail (GTK_IS_CSS_COMPUTED_VALUES (source), NULL);
+
+ values = g_object_new (GTK_TYPE_CSS_ANIMATED_VALUES, NULL);
+
+ values->computed = g_object_ref (computed);
+ for (i = 0; ; i++)
+ {
+ value = _gtk_css_computed_values_get_value (computed, i);
+
+ if (value == NULL)
+ break;
+
+ _gtk_css_computed_values_set_value (GTK_CSS_COMPUTED_VALUES (values),
+ i,
+ value,
+ _gtk_css_computed_values_get_section (computed, i));
+ }
+
+ gtk_css_animated_values_start_animations (values, timestamp, source);
+
+ ignore = _gtk_css_animated_values_advance (values, timestamp);
+ _gtk_bitmask_free (ignore);
+
+ return GTK_CSS_COMPUTED_VALUES (values);
+}
+
+GtkBitmask *
+_gtk_css_animated_values_advance (GtkCssAnimatedValues *values,
+ gint64 timestamp)
+{
+ GtkBitmask *changed;
+ GSList *list;
+
+ g_return_val_if_fail (GTK_IS_CSS_ANIMATED_VALUES (values), NULL);
+ g_return_val_if_fail (timestamp >= values->current_time, NULL);
+
+ changed = _gtk_bitmask_new ();
+
+ values->current_time = timestamp;
+
+ list = values->animations;
+ while (list)
+ {
+ GtkStyleAnimation *animation = list->data;
+
+ list = list->next;
+
+ changed = _gtk_style_animation_set_values (animation,
+ changed,
+ timestamp,
+ GTK_CSS_COMPUTED_VALUES (values));
+
+ if (_gtk_style_animation_is_finished (animation, timestamp))
+ {
+ values->animations = g_slist_remove (values->animations, animation);
+ g_object_unref (animation);
+ }
+ }
+
+ return changed;
+}
+
+gboolean
+_gtk_css_animated_values_is_finished (GtkCssAnimatedValues *values)
+{
+ g_return_val_if_fail (GTK_IS_CSS_ANIMATED_VALUES (values), TRUE);
+
+ return values->animations == NULL;
+}
diff --git a/gtk/gtkcssanimatedvaluesprivate.h b/gtk/gtkcssanimatedvaluesprivate.h
new file mode 100644
index 0000000..50ef4d8
--- /dev/null
+++ b/gtk/gtkcssanimatedvaluesprivate.h
@@ -0,0 +1,64 @@
+/*
+ * Copyright  2012 Red Hat Inc.
+ *
+ * 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 2.1 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/>.
+ *
+ * Authors: Benjamin Otte <otte gnome org>
+ */
+
+#ifndef __GTK_CSS_ANIMATED_VALUES_PRIVATE_H__
+#define __GTK_CSS_ANIMATED_VALUES_PRIVATE_H__
+
+#include "gtk/gtkcsscomputedvaluesprivate.h"
+
+G_BEGIN_DECLS
+
+#define GTK_TYPE_CSS_ANIMATED_VALUES (_gtk_css_animated_values_get_type ())
+#define GTK_CSS_ANIMATED_VALUES(obj) (G_TYPE_CHECK_INSTANCE_CAST (obj, GTK_TYPE_CSS_ANIMATED_VALUES, GtkCssAnimatedValues))
+#define GTK_CSS_ANIMATED_VALUES_CLASS(cls) (G_TYPE_CHECK_CLASS_CAST (cls, GTK_TYPE_CSS_ANIMATED_VALUES, GtkCssAnimatedValuesClass))
+#define GTK_IS_CSS_ANIMATED_VALUES(obj) (G_TYPE_CHECK_INSTANCE_TYPE (obj, GTK_TYPE_CSS_ANIMATED_VALUES))
+#define GTK_IS_CSS_ANIMATED_VALUES_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE (obj, GTK_TYPE_CSS_ANIMATED_VALUES))
+#define GTK_CSS_ANIMATED_VALUES_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_CSS_ANIMATED_VALUES, GtkCssAnimatedValuesClass))
+
+typedef struct _GtkCssAnimatedValues GtkCssAnimatedValues;
+typedef struct _GtkCssAnimatedValuesClass GtkCssAnimatedValuesClass;
+
+struct _GtkCssAnimatedValues
+{
+ GtkCssComputedValues parent;
+
+ gint64 current_time; /* the current time in our world */
+ GtkCssComputedValues *computed; /* the computed values we'd have without animations */
+ GSList *animations; /* the running animations */
+};
+
+struct _GtkCssAnimatedValuesClass
+{
+ GtkCssComputedValuesClass parent_class;
+};
+
+GType _gtk_css_animated_values_get_type (void) G_GNUC_CONST;
+
+GtkCssComputedValues * _gtk_css_animated_values_new (GtkCssComputedValues *computed,
+ GtkCssComputedValues *source,
+ gint64 timestamp);
+
+GtkBitmask * _gtk_css_animated_values_advance (GtkCssAnimatedValues *values,
+ gint64 timestamp) G_GNUC_WARN_UNUSED_RESULT;
+gboolean _gtk_css_animated_values_is_finished (GtkCssAnimatedValues *values);
+
+
+G_END_DECLS
+
+#endif /* __GTK_CSS_ANIMATED_VALUES_PRIVATE_H__ */
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