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author | Benjamin Otte <otte@redhat.com> | 2016-04-01 01:38:31 +0200 |
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committer | Benjamin Otte <otte@redhat.com> | 2016-04-08 16:18:32 +0200 |
commit | e351cbc83fb4f69735f694d145cda5b2e4c97e09 (patch) | |
tree | e541e216f70498b20e1c1c470f592b571de843ea | |
parent | f4fba248adcb5a5d5c39a4c6635bc6b35d895889 (diff) | |
download | gtk+-e351cbc83fb4f69735f694d145cda5b2e4c97e09.tar.gz |
cssimage: Add token parser for cross-fade()
-rw-r--r-- | gtk/gtkcssimagecrossfade.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/gtk/gtkcssimagecrossfade.c b/gtk/gtkcssimagecrossfade.c index 812457995a..e4e62a0161 100644 --- a/gtk/gtkcssimagecrossfade.c +++ b/gtk/gtkcssimagecrossfade.c @@ -203,6 +203,101 @@ gtk_css_image_cross_fade_parse (GtkCssImage *image, return TRUE; } +static gboolean +gtk_css_image_cross_fade_parse_progress (GtkCssTokenSource *source, + gboolean *parsed_something, + double *progress) +{ + const GtkCssToken *token; + GtkCssValue *value; + + token = gtk_css_token_source_get_token (source); + if (!gtk_css_number_value_check_token (token)) + { + *parsed_something = FALSE; + return TRUE; + } + + *parsed_something = TRUE; + + value = gtk_css_number_value_token_parse (source, GTK_CSS_PARSE_PERCENT | GTK_CSS_POSITIVE_ONLY); + if (value == NULL) + return FALSE; + + *progress = _gtk_css_number_value_get (value, 1.0); + _gtk_css_value_unref (value); + if (*progress < 0.0 || *progress > 1.0) + { + gtk_css_token_source_error (source, "Percentage must be between 0%% and 100%%"); + gtk_css_token_source_consume_all (source); + return FALSE; + } + + return TRUE; +} + +static guint +gtk_css_image_cross_fade_token_parse_argument (GtkCssTokenSource *source, + guint arg, + gpointer data) +{ + GtkCssImageCrossFade *cross_fade = data; + + if (arg == 0) + { + gboolean has_percentage = FALSE; + + if (!gtk_css_image_cross_fade_parse_progress (source, &has_percentage, &cross_fade->progress)) + return 0; + + cross_fade->end = gtk_css_image_new_token_parse (source); + if (cross_fade->end == NULL) + return 0; + + if (!has_percentage && + !gtk_css_image_cross_fade_parse_progress (source, &has_percentage, &cross_fade->progress)) + return 0; + if (!has_percentage) + cross_fade->progress = 0.5; + + return 1; + } + else if (arg == 1) + { + /* XXX: allow parsing colors here */ + cross_fade->start = gtk_css_image_new_token_parse (source); + if (cross_fade->start == NULL) + return 0; + + return 1; + } + else + { + g_assert_not_reached (); + return 0; + } +} + +static gboolean +gtk_css_image_cross_fade_token_parse (GtkCssImage *image, + GtkCssTokenSource *source) +{ + const GtkCssToken *token; + + token = gtk_css_token_source_get_token (source); + if (!gtk_css_token_is_function (token, "cross-fade")) + { + gtk_css_token_source_error (source, "Expected 'cross-fade('"); + gtk_css_token_source_consume_all (source); + return FALSE; + } + + return gtk_css_token_source_consume_function (source, + 2, 2, + gtk_css_image_cross_fade_token_parse_argument, + image); +} + static void gtk_css_image_cross_fade_print (GtkCssImage *image, GString *string) @@ -249,6 +344,7 @@ _gtk_css_image_cross_fade_class_init (GtkCssImageCrossFadeClass *klass) image_class->equal = gtk_css_image_cross_fade_equal; image_class->draw = gtk_css_image_cross_fade_draw; image_class->parse = gtk_css_image_cross_fade_parse; + image_class->token_parse = gtk_css_image_cross_fade_token_parse; image_class->print = gtk_css_image_cross_fade_print; object_class->dispose = gtk_css_image_cross_fade_dispose; |