548 lines
17 KiB
C
548 lines
17 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 2011 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "config.h"
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#include "gtkcsskeyframesprivate.h"
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#include "gtkcssarrayvalueprivate.h"
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#include "gtkcssshorthandpropertyprivate.h"
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#include "gtkcssstylepropertyprivate.h"
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#include "gtkstylepropertyprivate.h"
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#include <stdlib.h>
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#include <string.h>
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struct _GtkCssKeyframes {
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int ref_count; /* ref count */
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int n_keyframes; /* number of keyframes (at least 2 for 0% and 100% */
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double *keyframe_progress; /* ordered array of n_keyframes of [0..1] */
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int n_properties; /* number of properties used by keyframes */
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guint *property_ids; /* ordered array of n_properties property ids */
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GtkCssValue **values; /* 2D array: n_keyframes * n_properties of (value or NULL) for all the keyframes */
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};
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#define KEYFRAMES_VALUE(keyframes, k, p) ((keyframes)->values[(k) * (keyframes)->n_properties + (p)])
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GtkCssKeyframes *
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_gtk_css_keyframes_ref (GtkCssKeyframes *keyframes)
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{
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g_return_val_if_fail (keyframes != NULL, NULL);
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keyframes->ref_count++;
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return keyframes;
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}
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void
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_gtk_css_keyframes_unref (GtkCssKeyframes *keyframes)
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{
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guint k, p;
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g_return_if_fail (keyframes != NULL);
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keyframes->ref_count--;
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if (keyframes->ref_count > 0)
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return;
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g_free (keyframes->keyframe_progress);
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g_free (keyframes->property_ids);
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for (k = 0; k < keyframes->n_keyframes; k++)
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{
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for (p = 0; p < keyframes->n_properties; p++)
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{
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_gtk_css_value_unref (KEYFRAMES_VALUE (keyframes, k, p));
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KEYFRAMES_VALUE (keyframes, k, p) = NULL;
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}
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}
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g_free (keyframes->values);
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g_slice_free (GtkCssKeyframes, keyframes);
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}
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static guint
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gtk_css_keyframes_add_keyframe (GtkCssKeyframes *keyframes,
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double progress)
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{
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guint k, p;
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for (k = 0; k < keyframes->n_keyframes; k++)
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{
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if (keyframes->keyframe_progress[k] == progress)
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{
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for (p = 0; p < keyframes->n_properties; p++)
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{
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if (KEYFRAMES_VALUE (keyframes, k, p) == NULL)
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continue;
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_gtk_css_value_unref (KEYFRAMES_VALUE (keyframes, k, p));
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KEYFRAMES_VALUE (keyframes, k, p) = NULL;
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/* XXX: GC properties that are now unset
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* in all keyframes? */
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}
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return k;
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}
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else if (keyframes->keyframe_progress[k] > progress)
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break;
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}
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keyframes->n_keyframes++;
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keyframes->keyframe_progress = g_realloc (keyframes->keyframe_progress, sizeof (double) * keyframes->n_keyframes);
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memmove (keyframes->keyframe_progress + k + 1, keyframes->keyframe_progress + k, sizeof (double) * (keyframes->n_keyframes - k - 1));
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keyframes->keyframe_progress[k] = progress;
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if (keyframes->n_properties)
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{
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gsize size = sizeof (GtkCssValue *) * keyframes->n_properties;
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keyframes->values = g_realloc (keyframes->values, sizeof (GtkCssValue *) * keyframes->n_keyframes * keyframes->n_properties);
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memmove (&KEYFRAMES_VALUE (keyframes, k + 1, 0), &KEYFRAMES_VALUE (keyframes, k, 0), size * (keyframes->n_keyframes - k - 1));
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memset (&KEYFRAMES_VALUE (keyframes, k, 0), 0, size);
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}
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return k;
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}
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static guint
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gtk_css_keyframes_lookup_property (GtkCssKeyframes *keyframes,
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guint property_id)
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{
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guint p;
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for (p = 0; p < keyframes->n_properties; p++)
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{
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if (keyframes->property_ids[p] == property_id)
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return p;
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else if (keyframes->property_ids[p] > property_id)
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break;
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}
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keyframes->n_properties++;
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keyframes->property_ids = g_realloc (keyframes->property_ids, sizeof (guint) * keyframes->n_properties);
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memmove (keyframes->property_ids + p + 1, keyframes->property_ids + p, sizeof (guint) * (keyframes->n_properties - p - 1));
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keyframes->property_ids[p] = property_id;
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if (keyframes->n_properties > 1)
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{
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guint old_n_properties = keyframes->n_properties - 1;
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int k;
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keyframes->values = g_realloc (keyframes->values, sizeof (GtkCssValue *) * keyframes->n_keyframes * keyframes->n_properties);
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if (p + 1 < keyframes->n_properties)
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{
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memmove (&KEYFRAMES_VALUE (keyframes, keyframes->n_keyframes - 1, p + 1),
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&keyframes->values[(keyframes->n_keyframes - 1) * old_n_properties + p],
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sizeof (GtkCssValue *) * (keyframes->n_properties - p - 1));
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}
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KEYFRAMES_VALUE (keyframes, keyframes->n_keyframes - 1, p) = NULL;
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for (k = keyframes->n_keyframes - 2; k >= 0; k--)
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{
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memmove (&KEYFRAMES_VALUE (keyframes, k, p + 1),
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&keyframes->values[k * old_n_properties + p],
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sizeof (GtkCssValue *) * old_n_properties);
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KEYFRAMES_VALUE (keyframes, k, p) = NULL;
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}
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}
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else
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{
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keyframes->values = g_new0 (GtkCssValue *, keyframes->n_keyframes);
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}
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return p;
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}
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static GtkCssKeyframes *
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gtk_css_keyframes_alloc (void)
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{
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GtkCssKeyframes *keyframes;
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keyframes = g_slice_new0 (GtkCssKeyframes);
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keyframes->ref_count = 1;
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return keyframes;
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}
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static GtkCssKeyframes *
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gtk_css_keyframes_new (void)
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{
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GtkCssKeyframes *keyframes;
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keyframes = gtk_css_keyframes_alloc ();
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gtk_css_keyframes_add_keyframe (keyframes, 0);
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gtk_css_keyframes_add_keyframe (keyframes, 1);
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return keyframes;
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}
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static gboolean
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keyframes_set_value (GtkCssKeyframes *keyframes,
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guint k,
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GtkCssStyleProperty *property,
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GtkCssValue *value)
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{
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guint p;
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if (!_gtk_css_style_property_is_animated (property))
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return FALSE;
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p = gtk_css_keyframes_lookup_property (keyframes, _gtk_css_style_property_get_id (property));
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if (KEYFRAMES_VALUE (keyframes, k, p))
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_gtk_css_value_unref (KEYFRAMES_VALUE (keyframes, k, p));
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KEYFRAMES_VALUE (keyframes, k, p) = _gtk_css_value_ref (value);
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return TRUE;
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}
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static gboolean
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parse_declaration (GtkCssKeyframes *keyframes,
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guint k,
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GtkCssParser *parser)
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{
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GtkStyleProperty *property;
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GtkCssValue *value;
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char *name;
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while (_gtk_css_parser_try (parser, ";", TRUE))
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{
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/* SKIP ALL THE THINGS! */
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}
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name = _gtk_css_parser_try_ident (parser, TRUE);
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if (name == NULL)
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{
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_gtk_css_parser_error (parser, "No property name given");
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return FALSE;
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}
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property = _gtk_style_property_lookup (name);
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if (property == NULL)
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{
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/* should be GTK_CSS_PROVIDER_ERROR_NAME */
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_gtk_css_parser_error (parser, "No property named '%s'", name);
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g_free (name);
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return FALSE;
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}
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g_free (name);
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if (!_gtk_css_parser_try (parser, ":", TRUE))
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{
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_gtk_css_parser_error (parser, "Expected a ':'");
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return FALSE;
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}
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value = _gtk_style_property_parse_value (property, parser);
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if (value == NULL)
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return FALSE;
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if (!_gtk_css_parser_try (parser, ";", TRUE) &&
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!_gtk_css_parser_begins_with (parser, '}'))
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{
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_gtk_css_parser_error (parser, "Junk at end of value");
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_gtk_css_value_unref (value);
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return FALSE;
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}
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if (GTK_IS_CSS_SHORTHAND_PROPERTY (property))
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{
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GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
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gboolean animatable = FALSE;
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guint i;
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for (i = 0; i < _gtk_css_shorthand_property_get_n_subproperties (shorthand); i++)
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{
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GtkCssStyleProperty *child = _gtk_css_shorthand_property_get_subproperty (shorthand, i);
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GtkCssValue *sub = _gtk_css_array_value_get_nth (value, i);
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animatable |= keyframes_set_value (keyframes, k, child, sub);
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}
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if (!animatable)
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_gtk_css_parser_error (parser, "shorthand '%s' cannot be animated", _gtk_style_property_get_name (property));
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}
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else if (GTK_IS_CSS_STYLE_PROPERTY (property))
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{
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if (!keyframes_set_value (keyframes, k, GTK_CSS_STYLE_PROPERTY (property), value))
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_gtk_css_parser_error (parser, "Cannot animate property '%s'", _gtk_style_property_get_name (property));
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}
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else
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{
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g_assert_not_reached ();
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}
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_gtk_css_value_unref (value);
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return TRUE;
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}
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static gboolean
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parse_block (GtkCssKeyframes *keyframes,
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guint k,
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GtkCssParser *parser)
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{
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if (!_gtk_css_parser_try (parser, "{", TRUE))
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{
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_gtk_css_parser_error (parser, "Expected closing bracket after keyframes block");
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return FALSE;
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}
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while (!_gtk_css_parser_try (parser, "}", TRUE))
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{
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if (!parse_declaration (keyframes, k, parser))
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_gtk_css_parser_resync (parser, TRUE, '}');
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if (_gtk_css_parser_is_eof (parser))
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{
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_gtk_css_parser_error (parser, "Expected closing '}' after keyframes block");
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return FALSE;
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}
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}
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return TRUE;
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}
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GtkCssKeyframes *
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_gtk_css_keyframes_parse (GtkCssParser *parser)
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{
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GtkCssKeyframes *keyframes;
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double progress;
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guint k;
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g_return_val_if_fail (parser != NULL, NULL);
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keyframes = gtk_css_keyframes_new ();
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while (!_gtk_css_parser_begins_with (parser, '}'))
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{
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if (_gtk_css_parser_try (parser, "from", TRUE))
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progress = 0;
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else if (_gtk_css_parser_try (parser, "to", TRUE))
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progress = 1;
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else if (_gtk_css_parser_try_double (parser, &progress) &&
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_gtk_css_parser_try (parser, "%", TRUE))
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{
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if (progress < 0 || progress > 100)
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{
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/* XXX: should we skip over the block here? */
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_gtk_css_parser_error (parser, "percentages must be between 0%% and 100%%");
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_gtk_css_keyframes_unref (keyframes);
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return NULL;
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}
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progress /= 100;
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}
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else
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{
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_gtk_css_parser_error (parser, "expected a percentage");
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_gtk_css_keyframes_unref (keyframes);
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return NULL;
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}
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k = gtk_css_keyframes_add_keyframe (keyframes, progress);
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if (!parse_block (keyframes, k, parser))
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{
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_gtk_css_keyframes_unref (keyframes);
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return NULL;
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}
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}
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return keyframes;
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}
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static int
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compare_property_by_name (gconstpointer a,
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gconstpointer b,
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gpointer data)
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{
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GtkCssKeyframes *keyframes = data;
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return strcmp (_gtk_style_property_get_name (GTK_STYLE_PROPERTY (
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_gtk_css_style_property_lookup_by_id (keyframes->property_ids[*(const guint *) a]))),
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_gtk_style_property_get_name (GTK_STYLE_PROPERTY (
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_gtk_css_style_property_lookup_by_id (keyframes->property_ids[*(const guint *) b]))));
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}
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void
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_gtk_css_keyframes_print (GtkCssKeyframes *keyframes,
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GString *string)
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{
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guint k, p;
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guint *sorted;
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g_return_if_fail (keyframes != NULL);
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g_return_if_fail (string != NULL);
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sorted = g_new (guint, keyframes->n_properties);
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for (p = 0; p < keyframes->n_properties; p++)
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sorted[p] = p;
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g_qsort_with_data (sorted, keyframes->n_properties, sizeof (guint), compare_property_by_name, keyframes);
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for (k = 0; k < keyframes->n_keyframes; k++)
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{
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/* useful for 0% and 100% which might be empty */
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gboolean opened = FALSE;
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for (p = 0; p < keyframes->n_properties; p++)
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{
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if (KEYFRAMES_VALUE (keyframes, k, sorted[p]) == NULL)
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continue;
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if (!opened)
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{
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if (keyframes->keyframe_progress[k] == 0.0)
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g_string_append (string, " from {\n");
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else if (keyframes->keyframe_progress[k] == 1.0)
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g_string_append (string, " to {\n");
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else
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g_string_append_printf (string, " %g%% {\n", keyframes->keyframe_progress[k] * 100);
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opened = TRUE;
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}
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g_string_append_printf (string, " %s: ", _gtk_style_property_get_name (
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GTK_STYLE_PROPERTY (
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_gtk_css_style_property_lookup_by_id (
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keyframes->property_ids[sorted[p]]))));
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_gtk_css_value_print (KEYFRAMES_VALUE (keyframes, k, sorted[p]), string);
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g_string_append (string, ";\n");
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}
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if (opened)
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g_string_append (string, " }\n");
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}
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g_free (sorted);
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}
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GtkCssKeyframes *
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_gtk_css_keyframes_compute (GtkCssKeyframes *keyframes,
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GtkStyleProviderPrivate *provider,
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GtkCssStyle *style,
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GtkCssStyle *parent_style)
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{
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GtkCssKeyframes *resolved;
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guint k, p;
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g_return_val_if_fail (keyframes != NULL, NULL);
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g_return_val_if_fail (GTK_IS_STYLE_PROVIDER_PRIVATE (provider), NULL);
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g_return_val_if_fail (GTK_IS_CSS_STYLE (style), NULL);
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g_return_val_if_fail (parent_style == NULL || GTK_IS_CSS_STYLE (parent_style), NULL);
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resolved = gtk_css_keyframes_alloc ();
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resolved->n_keyframes = keyframes->n_keyframes;
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resolved->keyframe_progress = g_memdup (keyframes->keyframe_progress, keyframes->n_keyframes * sizeof (double));
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resolved->n_properties = keyframes->n_properties;
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resolved->property_ids = g_memdup (keyframes->property_ids, keyframes->n_properties * sizeof (guint));
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resolved->values = g_new0 (GtkCssValue *, resolved->n_keyframes * resolved->n_properties);
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for (p = 0; p < resolved->n_properties; p++)
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{
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for (k = 0; k < resolved->n_keyframes; k++)
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{
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if (KEYFRAMES_VALUE (keyframes, k, p) == NULL)
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continue;
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KEYFRAMES_VALUE (resolved, k, p) = _gtk_css_value_compute (KEYFRAMES_VALUE (keyframes, k, p),
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resolved->property_ids[p],
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provider,
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style,
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parent_style);
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}
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}
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return resolved;
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}
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guint
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_gtk_css_keyframes_get_n_properties (GtkCssKeyframes *keyframes)
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{
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g_return_val_if_fail (keyframes != NULL, 0);
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return keyframes->n_properties;
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}
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guint
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_gtk_css_keyframes_get_property_id (GtkCssKeyframes *keyframes,
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guint id)
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{
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g_return_val_if_fail (keyframes != NULL, 0);
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g_return_val_if_fail (id < keyframes->n_properties, 0);
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return keyframes->property_ids[id];
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}
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GtkCssValue *
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_gtk_css_keyframes_get_value (GtkCssKeyframes *keyframes,
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guint id,
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double progress,
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GtkCssValue *default_value)
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{
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GtkCssValue *start_value, *end_value, *result;
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double start_progress, end_progress;
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guint k;
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g_return_val_if_fail (keyframes != NULL, 0);
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g_return_val_if_fail (id < keyframes->n_properties, 0);
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start_value = default_value;
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start_progress = 0.0;
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|
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;
|
|
}
|
|
|