Commit c4cdb33b authored by Benjamin Otte's avatar Benjamin Otte

cssprovider: Add parsing support for @keyframes

parent 3ee83756
......@@ -445,6 +445,7 @@ gtk_private_h_sources = \
gtkcssimagewin32private.h \
gtkcssinheritvalueprivate.h \
gtkcssinitialvalueprivate.h \
gtkcsskeyframesprivate.h \
gtkcsslookupprivate.h \
gtkcssmatcherprivate.h \
gtkcssnumbervalueprivate.h \
......@@ -665,6 +666,7 @@ gtk_base_c_sources = \
gtkcssimagewin32.c \
gtkcssinheritvalue.c \
gtkcssinitialvalue.c \
gtkcsskeyframes.c \
gtkcsslookup.c \
gtkcssmatcher.c \
gtkcssnumbervalue.c \
......
/* GTK - The GIMP Toolkit
* Copyright (C) 2011 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 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 "gtkcsskeyframesprivate.h"
#include "gtkcssarrayvalueprivate.h"
#include "gtkcssshorthandpropertyprivate.h"
#include "gtkcssstylepropertyprivate.h"
#include "gtkstylepropertyprivate.h"
#include <stdlib.h>
#include <string.h>
struct _GtkCssKeyframes {
int ref_count; /* ref count */
int n_keyframes; /* number of keyframes (at least 2 for 0% and 100% */
double *keyframe_progress; /* ordered array of n_keyframes of [0..1] */
int n_properties; /* number of properties used by keyframes */
guint *property_ids; /* ordered array of n_properties property ids */
GtkCssValue **values; /* 2D array: n_keyframes * n_properties of (value or NULL) for all the keyframes */
};
GtkCssKeyframes *
_gtk_css_keyframes_ref (GtkCssKeyframes *keyframes)
{
g_return_val_if_fail (keyframes != NULL, NULL);
keyframes->ref_count++;
return keyframes;
}
void
_gtk_css_keyframes_unref (GtkCssKeyframes *keyframes)
{
g_return_if_fail (keyframes != NULL);
keyframes->ref_count--;
if (keyframes->ref_count > 0)
return;
g_free (keyframes->keyframe_progress);
g_free (keyframes->property_ids);
g_free (keyframes->values);
g_slice_free (GtkCssKeyframes, keyframes);
}
#define KEYFRAMES_VALUE(keyframes, k, p) ((keyframes)->values[(k) * (keyframes)->n_properties + (p)])
static guint
gtk_css_keyframes_add_keyframe (GtkCssKeyframes *keyframes,
double progress)
{
guint k, p;
for (k = 0; k < keyframes->n_keyframes; k++)
{
if (keyframes->keyframe_progress[k] == progress)
{
for (p = 0; p < keyframes->n_properties; p++)
{
if (KEYFRAMES_VALUE (keyframes, k, p) == NULL)
continue;
_gtk_css_value_unref (KEYFRAMES_VALUE (keyframes, k, p));
KEYFRAMES_VALUE (keyframes, k, p) = NULL;
/* XXX: GC properties that are now unset
* in all keyframes? */
}
return k;
}
else if (keyframes->keyframe_progress[k] > progress)
break;
}
keyframes->n_keyframes++;
keyframes->keyframe_progress = g_realloc (keyframes->keyframe_progress, sizeof (double) * keyframes->n_keyframes);
memmove (keyframes->keyframe_progress + k + 1, keyframes->keyframe_progress + k, sizeof (double) * (keyframes->n_keyframes - k - 1));
keyframes->keyframe_progress[k] = progress;
if (keyframes->n_properties)
{
gsize size = sizeof (GtkCssValue *) * keyframes->n_properties;
keyframes->values = g_realloc (keyframes->values, sizeof (GtkCssValue *) * keyframes->n_keyframes * keyframes->n_properties);
memmove (&KEYFRAMES_VALUE (keyframes, k + 1, 0), &KEYFRAMES_VALUE (keyframes, k, 0), size * (keyframes->n_keyframes - k - 1));
memset (&KEYFRAMES_VALUE (keyframes, k, 0), 0, size);
}
return k;
}
static guint
gtk_css_keyframes_lookup_property (GtkCssKeyframes *keyframes,
guint property_id)
{
guint p;
for (p = 0; p < keyframes->n_properties; p++)
{
if (keyframes->property_ids[p] == property_id)
return p;
else if (keyframes->property_ids[p] > property_id)
break;
}
keyframes->n_properties++;
keyframes->property_ids = g_realloc (keyframes->property_ids, sizeof (guint) * keyframes->n_properties);
memmove (keyframes->property_ids + p + 1, keyframes->property_ids + p, sizeof (guint) * (keyframes->n_properties - p - 1));
keyframes->property_ids[p] = property_id;
if (keyframes->n_properties > 1)
{
guint old_n_properties = keyframes->n_properties - 1;
int k;
keyframes->values = g_realloc (keyframes->values, sizeof (GtkCssValue *) * keyframes->n_keyframes * keyframes->n_properties);
if (p + 1 < keyframes->n_properties)
{
memmove (&KEYFRAMES_VALUE (keyframes, keyframes->n_keyframes - 1, p + 1),
&keyframes->values[(keyframes->n_keyframes - 1) * old_n_properties + p],
sizeof (GtkCssValue *) * (keyframes->n_properties - p - 1));
}
KEYFRAMES_VALUE (keyframes, keyframes->n_keyframes - 1, p) = NULL;
for (k = keyframes->n_keyframes - 2; k >= 0; k--)
{
memmove (&KEYFRAMES_VALUE (keyframes, k, p + 1),
&keyframes->values[k * old_n_properties + p],
sizeof (GtkCssValue *) * old_n_properties);
KEYFRAMES_VALUE (keyframes, k, p) = NULL;
}
}
else
{
keyframes->values = g_new0 (GtkCssValue *, keyframes->n_keyframes);
}
return p;
}
static GtkCssKeyframes *
gtk_css_keyframes_new (void)
{
GtkCssKeyframes *keyframes;
keyframes = g_slice_new0 (GtkCssKeyframes);
keyframes->ref_count = 1;
gtk_css_keyframes_add_keyframe (keyframes, 0);
gtk_css_keyframes_add_keyframe (keyframes, 1);
return keyframes;
}
static gboolean
keyframes_set_value (GtkCssKeyframes *keyframes,
guint k,
GtkCssStyleProperty *property,
GtkCssValue *value)
{
guint p;
if (!_gtk_css_style_property_is_animated (property))
return FALSE;
p = gtk_css_keyframes_lookup_property (keyframes, _gtk_css_style_property_get_id (property));
if (KEYFRAMES_VALUE (keyframes, k, p))
_gtk_css_value_unref (KEYFRAMES_VALUE (keyframes, k, p));
KEYFRAMES_VALUE (keyframes, k, p) = _gtk_css_value_ref (value);
return TRUE;
}
static gboolean
parse_declaration (GtkCssKeyframes *keyframes,
guint k,
GtkCssParser *parser)
{
GtkStyleProperty *property;
GtkCssValue *value;
char *name;
while (_gtk_css_parser_try (parser, ";", TRUE))
{
/* SKIP ALL THE THINGS! */
}
name = _gtk_css_parser_try_ident (parser, TRUE);
if (name == NULL)
{
_gtk_css_parser_error (parser, "No property name given");
return FALSE;
}
property = _gtk_style_property_lookup (name);
if (property == NULL)
{
/* should be GTK_CSS_PROVIDER_ERROR_NAME */
_gtk_css_parser_error (parser, "No property named '%s'", name);
g_free (name);
return FALSE;
}
g_free (name);
if (!_gtk_css_parser_try (parser, ":", TRUE))
{
_gtk_css_parser_error (parser, "Expected a ':'");
return FALSE;
}
value = _gtk_style_property_parse_value (property, parser);
if (value == NULL)
return FALSE;
if (!_gtk_css_parser_try (parser, ";", TRUE) &&
!_gtk_css_parser_begins_with (parser, '}'))
{
_gtk_css_parser_error (parser, "Junk at end of value");
_gtk_css_value_unref (value);
return FALSE;
}
if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
{
GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
gboolean animatable = FALSE;
guint i;
for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
{
GtkCssStyleProperty *child = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
GtkCssValue *sub = _gtk_css_array_value_get_nth (value, i);
animatable |= keyframes_set_value (keyframes, k, child, sub);
}
if (!animatable)
_gtk_css_parser_error (parser, "shorthand '%s' cannot be animated", _gtk_style_property_get_name (property));
}
else if (GTK_IS_CSS_STYLE_PROPERTY (property))
{
if (!keyframes_set_value (keyframes, k, GTK_CSS_STYLE_PROPERTY (property), value))
_gtk_css_parser_error (parser, "Cannot animate property '%s'", _gtk_style_property_get_name (property));
}
else
{
g_assert_not_reached ();
}
_gtk_css_value_unref (value);
return TRUE;
}
static gboolean
parse_block (GtkCssKeyframes *keyframes,
guint k,
GtkCssParser *parser)
{
if (!_gtk_css_parser_try (parser, "{", TRUE))
{
_gtk_css_parser_error (parser, "Expected closing bracket after keyframes block");
return FALSE;
}
while (!_gtk_css_parser_try (parser, "}", TRUE))
{
if (!parse_declaration (keyframes, k, parser))
_gtk_css_parser_resync (parser, TRUE, '}');
if (_gtk_css_parser_is_eof (parser))
{
_gtk_css_parser_error (parser, "Expected closing '}' after keyframes block");
return FALSE;
}
}
return TRUE;
}
GtkCssKeyframes *
_gtk_css_keyframes_parse (GtkCssParser *parser)
{
GtkCssKeyframes *keyframes;
double progress;
guint k;
g_return_val_if_fail (parser != NULL, NULL);
keyframes = gtk_css_keyframes_new ();
while (!_gtk_css_parser_begins_with (parser, '}'))
{
if (_gtk_css_parser_try (parser, "from", TRUE))
progress = 0;
else if (_gtk_css_parser_try (parser, "to", TRUE))
progress = 1;
else if (_gtk_css_parser_try_double (parser, &progress) &&
_gtk_css_parser_try (parser, "%", TRUE))
{
if (progress < 0 || progress > 100)
{
/* XXX: should we skip over the block here? */
_gtk_css_parser_error (parser, "percentages must be between 0%% and 100%%");
_gtk_css_keyframes_unref (keyframes);
return NULL;
}
progress /= 100;
}
else
{
_gtk_css_parser_error (parser, "expected a percentage");
_gtk_css_keyframes_unref (keyframes);
return NULL;
}
k = gtk_css_keyframes_add_keyframe (keyframes, progress);
if (!parse_block (keyframes, k, parser))
{
_gtk_css_keyframes_unref (keyframes);
return NULL;
}
}
return keyframes;
}
static int
compare_property_by_name (gconstpointer a,
gconstpointer b,
gpointer data)
{
GtkCssKeyframes *keyframes = data;
return strcmp (_gtk_style_property_get_name (GTK_STYLE_PROPERTY (
_gtk_css_style_property_lookup_by_id (keyframes->property_ids[*(const guint *) a]))),
_gtk_style_property_get_name (GTK_STYLE_PROPERTY (
_gtk_css_style_property_lookup_by_id (keyframes->property_ids[*(const guint *) b]))));
}
void
_gtk_css_keyframes_print (GtkCssKeyframes *keyframes,
GString *string)
{
guint k, p;
guint *sorted;
g_return_if_fail (keyframes != NULL);
g_return_if_fail (string != NULL);
sorted = g_new (guint, keyframes->n_properties);
for (p = 0; p < keyframes->n_properties; p++)
sorted[p] = p;
g_qsort_with_data (sorted, keyframes->n_properties, sizeof (guint), compare_property_by_name, keyframes);
for (k = 0; k < keyframes->n_keyframes; k++)
{
/* useful for 0% and 100% which might be empty */
gboolean opened = FALSE;
for (p = 0; p < keyframes->n_properties; p++)
{
if (KEYFRAMES_VALUE (keyframes, k, sorted[p]) == NULL)
continue;
if (!opened)
{
if (keyframes->keyframe_progress[k] == 0.0)
g_string_append (string, " from {\n");
else if (keyframes->keyframe_progress[k] == 1.0)
g_string_append (string, " to {\n");
else
g_string_append_printf (string, " %g%% {\n", keyframes->keyframe_progress[k] * 100);
opened = TRUE;
}
g_string_append_printf (string, " %s: ", _gtk_style_property_get_name (
GTK_STYLE_PROPERTY (
_gtk_css_style_property_lookup_by_id (
keyframes->property_ids[sorted[p]]))));
_gtk_css_value_print (KEYFRAMES_VALUE (keyframes, k, sorted[p]), string);
g_string_append (string, ";\n");
}
if (opened)
g_string_append (string, " }\n");
}
g_free (sorted);
}
GtkCssKeyframes *
_gtk_css_keyframes_compute (GtkCssKeyframes *keyframes,
GtkStyleContext *context)
{
GtkCssKeyframes *resolved;
guint k, p;
g_return_val_if_fail (keyframes != NULL, NULL);
g_return_val_if_fail (GTK_IS_STYLE_CONTEXT (context), NULL);
resolved = gtk_css_keyframes_new ();
resolved->n_keyframes = keyframes->n_keyframes;
resolved->keyframe_progress = g_memdup (keyframes->keyframe_progress, keyframes->n_keyframes * sizeof (double));
resolved->n_properties = keyframes->n_properties;
resolved->property_ids = g_memdup (keyframes->property_ids, keyframes->n_properties * sizeof (guint));
resolved->values = g_new0 (GtkCssValue *, resolved->n_keyframes * resolved->n_properties);
for (p = 0; p < resolved->n_properties; p++)
{
for (k = 0; k < resolved->n_keyframes; k++)
{
if (KEYFRAMES_VALUE (keyframes, k, p) == NULL)
continue;
KEYFRAMES_VALUE (resolved, k, p) = _gtk_css_value_compute (KEYFRAMES_VALUE (keyframes, k, p),
resolved->property_ids[p],
context,
NULL);
}
}
return resolved;
}
guint
_gtk_css_keyframes_get_n_properties (GtkCssKeyframes *keyframes)
{
g_return_val_if_fail (keyframes != NULL, 0);
return keyframes->n_properties;
}
guint
_gtk_css_keyframes_get_property_id (GtkCssKeyframes *keyframes,
guint id)
{
g_return_val_if_fail (keyframes != NULL, 0);
g_return_val_if_fail (id < keyframes->n_properties, 0);
return keyframes->property_ids[id];
}
GtkCssValue *
_gtk_css_keyframes_get_value (GtkCssKeyframes *keyframes,
guint id,
double progress,
GtkCssValue *default_value)
{
GtkCssValue *start_value, *end_value, *result;
double start_progress, end_progress;
guint k;
g_return_val_if_fail (keyframes != NULL, 0);
g_return_val_if_fail (id < keyframes->n_properties, 0);
start_value = default_value;
start_progress = 0.0;
end_value = default_value;
end_progress = 1.0;
for (k = 0; k < keyframes->n_keyframes; k++)
{
if (KEYFRAMES_VALUE (keyframes, k, id) == NULL)
continue;
if (keyframes->keyframe_progress[k] == progress)
{
return _gtk_css_value_ref (KEYFRAMES_VALUE (keyframes, k, id));
}
else if (keyframes->keyframe_progress[k] < progress)
{
start_value = KEYFRAMES_VALUE (keyframes, k, id);
start_progress = keyframes->keyframe_progress[k];
}
else
{
end_value = KEYFRAMES_VALUE (keyframes, k, id);
end_progress = keyframes->keyframe_progress[k];
break;
}
}
progress = (progress - start_progress) / (end_progress - start_progress);
result = _gtk_css_value_transition (start_value,
end_value,
keyframes->property_ids[id],
progress);
/* XXX: Dear spec, what's the correct thing to do here? */
if (result == NULL)
return _gtk_css_value_ref (start_value);
return result;
}
/*
* 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: Alexander Larsson <alexl@gnome.org>
*/
#ifndef __GTK_CSS_KEYFRAMES_PRIVATE_H__
#define __GTK_CSS_KEYFRAMES_PRIVATE_H__
#include "gtkcssparserprivate.h"
#include "gtkcssvalueprivate.h"
#include "gtktypes.h"
G_BEGIN_DECLS
typedef struct _GtkCssKeyframes GtkCssKeyframes;
GtkCssKeyframes * _gtk_css_keyframes_parse (GtkCssParser *parser);
GtkCssKeyframes * _gtk_css_keyframes_ref (GtkCssKeyframes *keyframes);
void _gtk_css_keyframes_unref (GtkCssKeyframes *keyframes);
void _gtk_css_keyframes_print (GtkCssKeyframes *keyframes,
GString *string);
GtkCssKeyframes * _gtk_css_keyframes_compute (GtkCssKeyframes *keyframes,
GtkStyleContext *context);
guint _gtk_css_keyframes_get_n_properties (GtkCssKeyframes *keyframes);
guint _gtk_css_keyframes_get_property_id (GtkCssKeyframes *keyframes,
guint id);
GtkCssValue * _gtk_css_keyframes_get_value (GtkCssKeyframes *keyframes,
guint id,
double progress,
GtkCssValue *default_value);
G_END_DECLS
#endif /* __GTK_CSS_KEYFRAMES_PRIVATE_H__ */
......@@ -27,11 +27,12 @@
#include "gtkbitmaskprivate.h"
#include "gtkcssarrayvalueprivate.h"
#include "gtkcssstylefuncsprivate.h"
#include "gtkcsskeyframesprivate.h"
#include "gtkcssparserprivate.h"
#include "gtkcsssectionprivate.h"
#include "gtkcssselectorprivate.h"
#include "gtkcssshorthandpropertyprivate.h"
#include "gtkcssstylefuncsprivate.h"
#include "gtksymboliccolor.h"
#include "gtkstyleprovider.h"
#include "gtkstylecontextprivate.h"
......@@ -1007,6 +1008,7 @@ struct _GtkCssProviderPrivate
GScanner *scanner;
GHashTable *symbolic_colors;
GHashTable *keyframes;
GArray *rulesets;
GResource *resource;
......@@ -1423,6 +1425,9 @@ gtk_css_provider_init (GtkCssProvider *css_provider)
priv->symbolic_colors = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) gtk_symbolic_color_unref);
priv->keyframes = g_hash_table_new_full (g_str_hash, g_str_equal,
(GDestroyNotify) g_free,
(GDestroyNotify) _gtk_css_value_unref);
}
static void
......@@ -1666,8 +1671,8 @@ gtk_css_provider_finalize (GObject *object)
g_array_free (priv->rulesets, TRUE);
if (priv->symbolic_colors)
g_hash_table_destroy (priv->symbolic_colors);
g_hash_table_destroy (priv->symbolic_colors);
g_hash_table_destroy (priv->keyframes);
if (priv->resource)
{
......@@ -1797,6 +1802,7 @@ gtk_css_provider_reset (GtkCssProvider *css_provider)
}
g_hash_table_remove_all (priv->symbolic_colors);
g_hash_table_remove_all (priv->keyframes);
for (i = 0; i < priv->rulesets->len; i++)
gtk_css_ruleset_clear (&g_array_index (priv->rulesets, GtkCssRuleset, i));
......@@ -2083,6 +2089,71 @@ skip_semicolon:
return TRUE;
}
static gboolean
parse_keyframes (GtkCssScanner *scanner)
{
GtkCssKeyframes *keyframes;
char *name;
gtk_css_scanner_push_section (scanner, GTK_CSS_SECTION_KEYFRAMES);
if (!_gtk_css_parser_try (scanner->parser, "@keyframes", TRUE))
{
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_KEYFRAMES);
return FALSE;
}
name = _gtk_css_parser_try_ident (scanner->parser, TRUE);
if (name == NULL)
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected name for keyframes");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
goto exit;
}
if (!_gtk_css_parser_try (scanner->parser, "{", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"Expected '{' for keyframes");
_gtk_css_parser_resync (scanner->parser, TRUE, 0);
g_free (name);
goto exit;
}
keyframes = _gtk_css_keyframes_parse (scanner->parser);
if (keyframes == NULL)
{
_gtk_css_parser_resync (scanner->parser, TRUE, '}');
g_free (name);
goto exit;
}
g_hash_table_insert (scanner->provider->priv->keyframes, name, keyframes);
if (!_gtk_css_parser_try (scanner->parser, "}", TRUE))
{
gtk_css_provider_error_literal (scanner->provider,
scanner,
GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_SYNTAX,
"expected '}' after declarations");
if (!_gtk_css_parser_is_eof (scanner->parser))
_gtk_css_parser_resync (scanner->parser, FALSE, 0);
}
exit:
gtk_css_scanner_pop_section (scanner, GTK_CSS_SECTION_KEYFRAMES);
return TRUE;
}
static void
parse_at_keyword (GtkCssScanner *scanner)
{
......@@ -2092,6 +2163,8 @@ parse_at_keyword (GtkCssScanner *scanner)
return;
if (parse_binding_set (scanner))
return;
if (parse_keyframes (scanner))
return;
else
{
......@@ -2964,6 +3037,33 @@ gtk_css_provider_print_colors (GHashTable *colors,
g_list_free (keys);
}
static void
gtk_css_provider_print_keyframes (GHashTable *keyframes,
GString *str)
{
GList *keys, *walk;
keys = g_hash_table_get_keys (keyframes);
/* so the output is identical for identical styles */
keys = g_list_sort (keys, (GCompareFunc) strcmp);
for (walk = keys; walk; walk = walk->next)
{
const char *name = walk->data;
GtkCssKeyframes *keyframe = g_hash_table_lookup (keyframes, (gpointer) name);
if (str->len > 0)
g_string_append (str, "\n");
g_string_append (str, "@keyframes ");
g_string_append (str, name);
g_string_append (str, " {\n");