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API: gtk: Add gtk_css_provider_to_string()

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This is intented to convert the contents of a CSS provider back to a
string.
It is not complete yet but good enough for starting a testsuite. :)
This commit is contained in:
Benjamin Otte 2011-04-06 22:03:35 +02:00
parent 8b6f92d087
commit b1556abe04
4 changed files with 321 additions and 0 deletions
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1
docs/reference/gtk/gtk3-sections.txt
View File

@ -5662,6 +5662,7 @@ gtk_css_provider_load_from_data
gtk_css_provider_load_from_file
gtk_css_provider_load_from_path
gtk_css_provider_new
gtk_css_provider_to_string
GTK_CSS_PROVIDER_ERROR
GtkCssProviderError
<SUBSECTION Standard>

1
gtk/gtk.symbols
View File

@ -698,6 +698,7 @@ gtk_css_provider_load_from_data
gtk_css_provider_load_from_file
gtk_css_provider_load_from_path
gtk_css_provider_new
gtk_css_provider_to_string
#ifdef G_OS_UNIX
gtk_custom_paper_unix_dialog_get_type G_GNUC_CONST
#endif

317
gtk/gtkcssprovider.c
View File

@ -4249,3 +4249,320 @@ gtk_css_provider_get_named (const gchar *name,
return provider;
}
static void
gtk_css_provider_print_value (const GValue *value,
GString * str)
{
char *s;
if (G_VALUE_TYPE (value) == GTK_TYPE_BORDER)
{
const GtkBorder *border = g_value_get_boxed (value);
if (border == NULL)
g_string_append (str, "none");
else if (border->left != border->right)
g_string_append_printf (str, "%d %d %d %d", border->top, border->right, border->bottom, border->left);
else if (border->top != border->bottom)
g_string_append_printf (str, "%d %d %d", border->top, border->right, border->bottom);
else if (border->top != border->left)
g_string_append_printf (str, "%d %d", border->top, border->right);
else
g_string_append_printf (str, "%d", border->top);
return;
}
else if (G_VALUE_TYPE (value) == GDK_TYPE_RGBA)
{
const GdkRGBA *rgba = g_value_get_boxed (value);
if (rgba == NULL)
g_string_append (str, "none");
else
{
s = gdk_rgba_to_string (g_value_get_boxed (value));
g_string_append (str, s);
g_free (s);
}
return;
}
else if (G_VALUE_TYPE (value) == GTK_TYPE_SYMBOLIC_COLOR)
{
GtkSymbolicColor *color = g_value_get_boxed (value);
if (color == NULL)
g_string_append (str, "none");
else
{
s = gtk_symbolic_color_to_string (color);
g_string_append (str, s);
g_free (s);
}
return;
}
else if (G_VALUE_TYPE (value) == GTK_TYPE_ANIMATION_DESCRIPTION)
{
GtkAnimationDescription *desc = g_value_get_boxed (value);
if (desc == NULL)
g_string_append (str, "none");
else
{
s = _gtk_animation_description_to_string (desc);
g_string_append (str, s);
g_free (s);
}
return;
}
else if (G_VALUE_TYPE (value) == GTK_TYPE_GRADIENT)
{
GtkGradient *gradient = g_value_get_boxed (value);
if (gradient == NULL)
g_string_append (str, "none");
else
{
s = gtk_gradient_to_string (gradient);
g_string_append (str, s);
g_free (s);
}
return;
}
else if (G_VALUE_TYPE (value) == PANGO_TYPE_FONT_DESCRIPTION)
{
PangoFontDescription *desc = g_value_get_boxed (value);
if (desc == NULL)
g_string_append (str, "none");
else
{
s = pango_font_description_to_string (desc);
g_string_append (str, s);
g_free (s);
}
return;
}
if (g_type_is_a (G_VALUE_TYPE (value), G_TYPE_ENUM))
{
GEnumClass *enum_class;
GEnumValue *enum_value;
enum_class = g_type_class_ref (G_VALUE_TYPE (value));
enum_value = g_enum_get_value (enum_class, g_value_get_enum (value));
g_string_append (str, enum_value->value_nick);
g_type_class_unref (enum_class);
return;
}
/* fall back to boring strdup in the worst case */
s = g_strdup_value_contents (value);
g_string_append (str, s);
g_free (s);
}
static void
selector_path_print (const SelectorPath *path,
GString * str)
{
GSList *walk, *reverse;
reverse = g_slist_copy (path->elements);
reverse = g_slist_reverse (reverse);
for (walk = reverse; walk; walk = walk->next)
{
SelectorElement *elem = walk->data;
switch (elem->elem_type)
{
case SELECTOR_TYPE_NAME:
case SELECTOR_NAME:
g_string_append (str, g_quark_to_string (elem->name));
break;
case SELECTOR_GTYPE:
g_string_append (str, g_type_name (elem->type));
break;
case SELECTOR_REGION:
g_string_append (str, g_quark_to_string (elem->region.name));
if (elem->region.flags)
{
char * flag_names[] = {
"nth-child(even)",
"nth-child(odd)",
"first-child",
"last-child",
"sorted"
};
guint i;
for (i = 0; i < G_N_ELEMENTS (flag_names); i++)
{
if (elem->region.flags & (1 << i))
{
g_string_append_c (str, ':');
g_string_append (str, flag_names[i]);
}
}
}
break;
case SELECTOR_CLASS:
g_string_append_c (str, '.');
g_string_append (str, g_quark_to_string (elem->name));
break;
case SELECTOR_GLOB:
if (walk->next == NULL ||
elem->combinator != COMBINATOR_CHILD ||
((SelectorElement *) walk->next->data)->elem_type != SELECTOR_CLASS)
g_string_append (str, "*");
break;
default:
g_assert_not_reached ();
}
if (walk->next)
{
switch (elem->combinator)
{
case COMBINATOR_DESCENDANT:
if (elem->elem_type != SELECTOR_CLASS ||
((SelectorElement *) walk->next->data)->elem_type != SELECTOR_CLASS)
g_string_append_c (str, ' ');
break;
case COMBINATOR_CHILD:
if (((SelectorElement *) walk->next->data)->elem_type != SELECTOR_CLASS)
g_string_append (str, " > ");
break;
default:
g_assert_not_reached ();
}
}
}
if (path->state)
{
char * state_names[] = {
"active",
"hover",
"selected",
"insensitive",
"inconsistent",
"focus"
};
guint i;
for (i = 0; i < G_N_ELEMENTS (state_names); i++)
{
if (path->state & (1 << i))
{
g_string_append_c (str, ':');
g_string_append (str, state_names[i]);
}
}
}
g_slist_free (reverse);
}
static void
selector_style_info_print (const SelectorStyleInfo *info,
GString *str)
{
GList *keys, *walk;
selector_path_print (info->path, str);
g_string_append (str, " {\n");
keys = g_hash_table_get_keys (info->style);
/* so the output is identical for identical selector styles */
keys = g_list_sort (keys, (GCompareFunc) strcmp);
for (walk = keys; walk; walk = walk->next)
{
const char *name = walk->data;
const GValue *value = g_hash_table_lookup (info->style, (gpointer) name);
g_string_append (str, " ");
g_string_append (str, name);
g_string_append (str, ": ");
gtk_css_provider_print_value (value, str);
g_string_append (str, ";\n");
}
g_list_free (keys);
g_string_append (str, "}\n");
}
static void
gtk_css_provider_print_colors (GHashTable *colors,
GString *str)
{
GList *keys, *walk;
char *s;
keys = g_hash_table_get_keys (colors);
/* 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;
GtkSymbolicColor *symbolic = g_hash_table_lookup (colors, (gpointer) name);
g_string_append (str, "@define-color ");
g_string_append (str, name);
g_string_append (str, " ");
s = gtk_symbolic_color_to_string (symbolic);
g_string_append (str, s);
g_free (s);
g_string_append (str, ";\n");
}
g_list_free (keys);
}
/**
* gtk_css_provider_to_string:
* @provider: the provider to write to a string
*
* Convertes the @provider into a string representation in CSS
* format.
*
* Using gtk_css_provider_load_from_data() with the return value
* from this function on a new provider created with
* gtk_css_provider_new() will basicallu create a duplicate of
* this @provider.
*
* Returns: a new string representing the @provider.
**/
char *
gtk_css_provider_to_string (GtkCssProvider *provider)
{
GtkCssProviderPrivate *priv;
GString *str;
guint i;
g_return_val_if_fail (GTK_IS_CSS_PROVIDER (provider), NULL);
priv = provider->priv;
str = g_string_new ("");
gtk_css_provider_print_colors (priv->symbolic_colors, str);
for (i = 0; i < priv->selectors_info->len; i++)
{
if (i > 0)
g_string_append (str, "\n");
selector_style_info_print (g_ptr_array_index (priv->selectors_info, i),
str);
}
return g_string_free (str, FALSE);
}

2
gtk/gtkcssprovider.h
View File

@ -65,6 +65,8 @@ GType gtk_css_provider_get_type (void) G_GNUC_CONST;
GtkCssProvider * gtk_css_provider_new (void);
char * gtk_css_provider_to_string (GtkCssProvider *provider);
gboolean gtk_css_provider_load_from_data (GtkCssProvider *css_provider,
const gchar *data,
gssize length,