/* * Clutter. * * An OpenGL based 'interactive canvas' library. * * Authored By Matthew Allum * * Copyright (C) 2006 OpenedHand * * 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, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:clutter-label * @short_description: Actor for displaying text * * #ClutterLabel is a #ClutterTexture that displays text. */ #include "config.h" #include "clutter-label.h" #include "clutter-main.h" #include "clutter-enum-types.h" #include "clutter-private.h" /* for DBG */ #include "pangoclutter.h" #define DEFAULT_FONT_NAME "Sans 10" G_DEFINE_TYPE (ClutterLabel, clutter_label, CLUTTER_TYPE_ACTOR); /* Probably move into main */ static PangoClutterFontMap *_font_map = NULL; static PangoContext *_context = NULL; enum { PROP_0, PROP_FONT_NAME, PROP_TEXT, PROP_COLOR, PROP_ATTRIBUTES, PROP_USE_MARKUP, PROP_ALIGNMENT, /* FIXME */ PROP_WRAP, PROP_WRAP_MODE, PROP_ELLIPSIZE, }; #define CLUTTER_LABEL_GET_PRIVATE(obj) \ (G_TYPE_INSTANCE_GET_PRIVATE ((obj), CLUTTER_TYPE_LABEL, ClutterLabelPrivate)) struct _ClutterLabelPrivate { PangoContext *context; PangoFontDescription *desc; ClutterColor fgcol; gchar *text; gchar *font_name; gint extents_width; gint extents_height; guint alignment : 2; guint wrap : 1; guint use_underline : 1; guint use_markup : 1; guint ellipsize : 3; guint single_line_mode : 1; guint wrap_mode : 3; PangoAttrList *attrs; PangoAttrList *effective_attrs; PangoLayout *layout; gint width_chars; }; static void clutter_label_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { ClutterLabel *label; ClutterLabelPrivate *priv; label = CLUTTER_LABEL(object); priv = label->priv; switch (prop_id) { case PROP_FONT_NAME: clutter_label_set_font_name (label, g_value_get_string (value)); break; case PROP_TEXT: clutter_label_set_text (label, g_value_get_string (value)); break; case PROP_COLOR: clutter_label_set_color (label, g_value_get_boxed (value)); break; case PROP_ATTRIBUTES: clutter_label_set_attributes (label, g_value_get_boxed (value)); break; case PROP_ALIGNMENT: clutter_label_set_alignment (label, g_value_get_enum (value)); break; case PROP_USE_MARKUP: clutter_label_set_use_markup (label, g_value_get_boolean (value)); break; case PROP_WRAP: clutter_label_set_line_wrap (label, g_value_get_boolean (value)); break; case PROP_WRAP_MODE: clutter_label_set_line_wrap_mode (label, g_value_get_enum (value)); break; case PROP_ELLIPSIZE: clutter_label_set_ellipsize (label, g_value_get_enum (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void clutter_label_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { ClutterLabel *label; ClutterLabelPrivate *priv; ClutterColor color; label = CLUTTER_LABEL(object); priv = label->priv; switch (prop_id) { case PROP_FONT_NAME: g_value_set_string (value, priv->font_name); break; case PROP_TEXT: g_value_set_string (value, priv->text); break; case PROP_COLOR: clutter_label_get_color (label, &color); g_value_set_boxed (value, &color); break; case PROP_ATTRIBUTES: g_value_set_boxed (value, priv->attrs); break; case PROP_ALIGNMENT: g_value_set_enum (value, priv->alignment); break; case PROP_USE_MARKUP: g_value_set_boolean (value, priv->use_markup); break; case PROP_WRAP: g_value_set_boolean (value, priv->wrap); break; case PROP_WRAP_MODE: g_value_set_enum (value, priv->wrap_mode); break; case PROP_ELLIPSIZE: g_value_set_enum (value, priv->ellipsize); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void clutter_label_ensure_layout (ClutterLabel *label, gint width) { ClutterLabelPrivate *priv; priv = label->priv; if (!priv->layout) { priv->layout = pango_layout_new (_context); if (priv->effective_attrs) pango_layout_set_attributes (priv->layout, priv->effective_attrs); pango_layout_set_alignment (priv->layout, priv->alignment); pango_layout_set_ellipsize (priv->layout, priv->ellipsize); pango_layout_set_single_paragraph_mode (priv->layout, priv->single_line_mode); pango_layout_set_font_description (priv->layout, priv->desc); pango_layout_set_text (priv->layout, priv->text, -1); if (priv->wrap) pango_layout_set_wrap (priv->layout, priv->wrap_mode); if ((priv->ellipsize || priv->wrap) && width > 0) { pango_layout_set_width (priv->layout, width * PANGO_SCALE); } else pango_layout_set_width (priv->layout, -1); } } static void clutter_label_clear_layout (ClutterLabel *label) { if (label->priv->layout) { g_object_unref (label->priv->layout); label->priv->layout = NULL; } } void clutter_label_paint (ClutterActor *self) { ClutterLabel *label; ClutterLabelPrivate *priv; label = CLUTTER_LABEL(self); priv = label->priv; if (priv->desc == NULL || priv->text == NULL) { CLUTTER_DBG("*** FAIL: layout: %p , desc: %p, text %p ***", priv->layout, priv->desc, priv->text); return; } clutter_label_ensure_layout (label, clutter_actor_get_width(self)); priv->fgcol.alpha = clutter_actor_get_opacity(self); pango_clutter_render_layout (priv->layout, 0, 0, &priv->fgcol, 0); } static void clutter_label_allocate_coords (ClutterActor *self, ClutterActorBox *box) { ClutterLabel *label = CLUTTER_LABEL(self); ClutterLabelPrivate *priv; PangoRectangle logical_rect; priv = label->priv; clutter_label_ensure_layout (label, box->x2 - box->x1); pango_layout_get_extents (priv->layout, NULL, &logical_rect); box->x2 = box->x1 + PANGO_PIXELS (logical_rect.width); box->y2 = box->y1 + PANGO_PIXELS (logical_rect.height); return; } static void clutter_label_request_coords (ClutterActor *self, ClutterActorBox *box) { /* do we need to do anything ? */ clutter_label_clear_layout (CLUTTER_LABEL(self)); } static void clutter_label_dispose (GObject *object) { ClutterLabel *self = CLUTTER_LABEL(object); ClutterLabelPrivate *priv; priv = self->priv; if (priv->layout) { g_object_unref (priv->layout); priv->layout = NULL; } if (priv->desc) { pango_font_description_free (priv->desc); priv->desc = NULL; } g_free (priv->text); priv->text = NULL; g_free (priv->font_name); priv->font_name = NULL; if (priv->context) { g_object_unref (priv->context); priv->context = NULL; } G_OBJECT_CLASS (clutter_label_parent_class)->dispose (object); } static void clutter_label_finalize (GObject *object) { G_OBJECT_CLASS (clutter_label_parent_class)->finalize (object); } static void clutter_label_class_init (ClutterLabelClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); ClutterActorClass *actor_class = CLUTTER_ACTOR_CLASS (klass); actor_class->paint = clutter_label_paint; actor_class->request_coords = clutter_label_request_coords; actor_class->allocate_coords = clutter_label_allocate_coords; gobject_class->finalize = clutter_label_finalize; gobject_class->dispose = clutter_label_dispose; gobject_class->set_property = clutter_label_set_property; gobject_class->get_property = clutter_label_get_property; g_object_class_install_property (gobject_class, PROP_FONT_NAME, g_param_spec_string ("font-name", "Font Name", "Pango font description", NULL, G_PARAM_CONSTRUCT | G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_TEXT, g_param_spec_string ("text", "Text", "Text to render", NULL, G_PARAM_CONSTRUCT | G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_COLOR, g_param_spec_boxed ("color", "Font Colour", "Font Colour", CLUTTER_TYPE_COLOR, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_ATTRIBUTES, g_param_spec_boxed ("attributes", "Attributes", "A list of style attributes to apply to the" "text of the label", PANGO_TYPE_ATTR_LIST, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_USE_MARKUP, g_param_spec_boolean ("use-markup", "Use markup", "The text of the label includes XML markup." "See pango_parse_markup()", FALSE, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_WRAP, g_param_spec_boolean ("wrap", "Line wrap", "If set, wrap lines if the text becomes too wide", TRUE, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_WRAP_MODE, g_param_spec_enum ("wrap-mode", "Line wrap mode", "If wrap is set, controls how linewrapping is done", PANGO_TYPE_WRAP_MODE, PANGO_WRAP_WORD, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_ELLIPSIZE, g_param_spec_enum ( "ellipsize", "Ellipsize", "The preferred place to ellipsize the string," "if the label does not have enough room to " "display the entire string", PANGO_TYPE_ELLIPSIZE_MODE, PANGO_ELLIPSIZE_NONE, G_PARAM_READWRITE)); g_object_class_install_property (gobject_class, PROP_ALIGNMENT, g_param_spec_enum ( "alignment", "Alignment", "The preferred alignment for the string,", PANGO_TYPE_ALIGNMENT, PANGO_ALIGN_LEFT, G_PARAM_READWRITE)); g_type_class_add_private (gobject_class, sizeof (ClutterLabelPrivate)); } static void clutter_label_init (ClutterLabel *self) { ClutterLabelPrivate *priv; self->priv = priv = CLUTTER_LABEL_GET_PRIVATE (self); if (_context == NULL) { _font_map = PANGO_CLUTTER_FONT_MAP (pango_clutter_font_map_new ()); /* pango_clutter_font_map_set_resolution (font_map, 96.0, 96.0); */ _context = pango_clutter_font_map_create_context (_font_map); } priv->alignment = PANGO_ALIGN_LEFT; priv->wrap = TRUE; priv->wrap_mode = PANGO_WRAP_WORD; priv->ellipsize = PANGO_ELLIPSIZE_NONE; priv->use_underline = FALSE; priv->use_markup = FALSE; priv->layout = NULL; priv->text = NULL; priv->attrs = NULL; priv->fgcol.red = 0; priv->fgcol.green = 0; priv->fgcol.blue = 0; priv->fgcol.alpha = 255; priv->font_name = g_strdup (DEFAULT_FONT_NAME); priv->desc = pango_font_description_from_string (priv->font_name); CLUTTER_MARK(); } /** * clutter_label_new_with_text: * @font_name: the name (and size) of the font to be used * @text: the text to be displayed * * Creates a new #ClutterLabel displaying @text using @font_name. * * Return value: a #ClutterLabel */ ClutterActor* clutter_label_new_with_text (const gchar *font_name, const gchar *text) { ClutterActor *label; CLUTTER_MARK(); label = clutter_label_new (); clutter_label_set_font_name (CLUTTER_LABEL(label), font_name); clutter_label_set_text (CLUTTER_LABEL(label), text); return label; } /** * clutter_label_new: * * Creates a new, empty #ClutterLabel. * * Returns: the newly created #ClutterLabel */ ClutterActor * clutter_label_new (void) { return g_object_new (CLUTTER_TYPE_LABEL, NULL); } /** * clutter_label_get_text: * @label: a #ClutterLabel * * Retrieves the text displayed by @label * * Return value: the text of the label. The returned string is * owned by #ClutterLabel and should not be modified or freed. */ G_CONST_RETURN gchar * clutter_label_get_text (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), NULL); return label->priv->text; } /** * clutter_label_set_text: * @label: a #ClutterLabel * @text: the text to be displayed * * Sets @text as the text to be displayed by @label. */ void clutter_label_set_text (ClutterLabel *label, const gchar *text) { ClutterLabelPrivate *priv; g_return_if_fail (CLUTTER_IS_LABEL (label)); priv = label->priv; g_free (priv->text); priv->text = g_strdup (text); clutter_label_clear_layout (label); if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(label))) clutter_actor_queue_redraw (CLUTTER_ACTOR(label)); g_object_notify (G_OBJECT (label), "text"); } /** * clutter_label_get_font_name: * @label: a #ClutterLabel * * Retrieves the font used by @label. * * Return value: a string containing the font name, in a format * understandable by pango_font_description_from_string(). The * string is owned by #ClutterLabel and should not be modified * or freed. */ G_CONST_RETURN gchar * clutter_label_get_font_name (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), NULL); return label->priv->font_name; } /** * clutter_label_set_font_name: * @label: a #ClutterLabel * @font_name: a font name and size, or %NULL for the default font * * Sets @font_name as the font used by @label. * * @font_name must be a string containing the font name and its * size, similarly to what you would feed to the * pango_font_description_from_string() function. */ void clutter_label_set_font_name (ClutterLabel *label, const gchar *font_name) { ClutterLabelPrivate *priv; g_return_if_fail (CLUTTER_IS_LABEL (label)); if (!font_name || font_name[0] == '\0') font_name = DEFAULT_FONT_NAME; priv = label->priv; if (priv->desc) pango_font_description_free (priv->desc); g_free (priv->font_name); priv->font_name = g_strdup (font_name); priv->desc = pango_font_description_from_string (priv->font_name); if (!priv->desc) { g_warning ("Attempting to create a PangoFontDescription for " "font name `%s', but failed.", priv->font_name); return; } if (label->priv->text && label->priv->text[0] != '\0') { clutter_label_clear_layout (label); if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(label))) clutter_actor_queue_redraw (CLUTTER_ACTOR(label)); } g_object_notify (G_OBJECT (label), "font-name"); } /** * clutter_label_set_color: * @label: a #ClutterLabel * @color: a #ClutterColor * * Sets the color of @label. */ void clutter_label_set_color (ClutterLabel *label, const ClutterColor *color) { ClutterActor *actor; ClutterLabelPrivate *priv; g_return_if_fail (CLUTTER_IS_LABEL (label)); g_return_if_fail (color != NULL); priv = label->priv; priv->fgcol.red = color->red; priv->fgcol.green = color->green; priv->fgcol.blue = color->blue; priv->fgcol.alpha = color->alpha; actor = CLUTTER_ACTOR (label); clutter_actor_set_opacity (actor, priv->fgcol.alpha); if (CLUTTER_ACTOR_IS_VISIBLE (actor)) clutter_actor_queue_redraw (actor); g_object_notify (G_OBJECT (label), "color"); } /** * clutter_label_get_color: * @label: a #ClutterLabel * @color: return location for a #ClutterColor * * Retrieves the color of @label. */ void clutter_label_get_color (ClutterLabel *label, ClutterColor *color) { ClutterLabelPrivate *priv; g_return_if_fail (CLUTTER_IS_LABEL (label)); g_return_if_fail (color != NULL); priv = label->priv; color->red = priv->fgcol.red; color->green = priv->fgcol.green; color->blue = priv->fgcol.blue; color->alpha = priv->fgcol.alpha; } /** * clutter_label_set_ellipsize: * @label: a #ClutterLabel * @mode: a #PangoEllipsizeMode * * Sets the mode used to ellipsize (add an ellipsis: "...") to the text * if there is not enough space to render the entire string. * * Since: 0.2 **/ void clutter_label_set_ellipsize (ClutterLabel *label, PangoEllipsizeMode mode) { g_return_if_fail (CLUTTER_IS_LABEL (label)); g_return_if_fail (mode >= PANGO_ELLIPSIZE_NONE && mode <= PANGO_ELLIPSIZE_END); if ((PangoEllipsizeMode) label->priv->ellipsize != mode) { label->priv->ellipsize = mode; clutter_label_clear_layout (label); if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(label))) clutter_actor_queue_redraw (CLUTTER_ACTOR(label)); } } /** * clutter_label_get_ellipsize: * @label: a #ClutterLabel * * Returns the ellipsizing position of the label. * See clutter_label_set_ellipsize(). * * Return value: #PangoEllipsizeMode * * Since: 0.2 **/ PangoEllipsizeMode clutter_label_get_ellipsize (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), PANGO_ELLIPSIZE_NONE); return label->priv->ellipsize; } /** * clutter_label_set_line_wrap: * @label: a #ClutterLabel * @wrap: the setting * * Toggles line wrapping within the #ClutterLabel widget. %TRUE makes it break * lines if text exceeds the widget's size. %FALSE lets the text get cut off * by the edge of the widget if it exceeds the widget size. * * Note that setting line wrapping to %TRUE does not make the label * wrap at its parent container's width, because CLUTTER+ widgets * conceptually can't make their requisition depend on the parent * container's size. For a label that wraps at a specific position, * set the label's width using clutter_widget_set_size_request(). **/ void clutter_label_set_line_wrap (ClutterLabel *label, gboolean wrap) { g_return_if_fail (CLUTTER_IS_LABEL (label)); wrap = wrap != FALSE; if (label->priv->wrap != wrap) { label->priv->wrap = wrap; clutter_label_clear_layout (label); if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(label))) clutter_actor_queue_redraw (CLUTTER_ACTOR(label)); g_object_notify (G_OBJECT (label), "wrap"); } } /** * clutter_label_get_line_wrap: * @label: a #ClutterLabel * * Returns whether lines in the label are automatically wrapped. * See clutter_label_set_line_wrap (). * * Return value: %TRUE if the lines of the label are automatically wrapped. * * Since: 0.2 */ gboolean clutter_label_get_line_wrap (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), FALSE); return label->priv->wrap; } /** * clutter_label_set_line_wrap_mode: * @label: a #ClutterLabel * @wrap_mode: the line wrapping mode * * If line wrapping is on (see clutter_label_set_line_wrap()) this controls how * the line wrapping is done. The default is %PANGO_WRAP_WORD which means * wrap on word boundaries. * * Since: 0.2 **/ void clutter_label_set_line_wrap_mode (ClutterLabel *label, PangoWrapMode wrap_mode) { g_return_if_fail (CLUTTER_IS_LABEL (label)); if (label->priv->wrap_mode != wrap_mode) { label->priv->wrap_mode = wrap_mode; clutter_label_clear_layout (label); if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(label))) clutter_actor_queue_redraw (CLUTTER_ACTOR(label)); g_object_notify (G_OBJECT (label), "wrap-mode"); } } /** * clutter_label_get_line_wrap_mode: * @label: a #ClutterLabel * * Returns line wrap mode used by the label. See clutter_label_set_line_wrap_mode (). * * Return value: %TRUE if the lines of the label are automatically wrapped. * * Since: 0.2 */ PangoWrapMode clutter_label_get_line_wrap_mode (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), FALSE); return label->priv->wrap_mode; } /** * clutter_label_get_layout: * @label: a #ClutterLabel * * Gets the #PangoLayout used to display the label. * The layout is useful to e.g. convert text positions to * pixel positions. * The returned layout is owned by the label so need not be * freed by the caller. * * Return value: the #PangoLayout for this label * * Since: 0.2 **/ PangoLayout* clutter_label_get_layout (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), NULL); clutter_label_ensure_layout (label, -1); return label->priv->layout; } static void clutter_label_set_attributes_internal (ClutterLabel *label, PangoAttrList *attrs) { ClutterLabelPrivate *priv; priv = label->priv; if (attrs) pango_attr_list_ref (attrs); if (priv->attrs) pango_attr_list_unref (priv->attrs); if (!priv->use_markup) { if (attrs) pango_attr_list_ref (attrs); if (priv->effective_attrs) pango_attr_list_unref (priv->effective_attrs); priv->effective_attrs = attrs; } label->priv->attrs = attrs; g_object_notify (G_OBJECT (label), "attributes"); } /** * clutter_label_set_attributes: * @label: a #ClutterLabel * @attrs: a #PangoAttrList * * Sets a #PangoAttrList; the attributes in the list are applied to the * label text. The attributes set with this function will be ignored * if the "use_markup" property * is %TRUE. * * Since: 0.2 **/ void clutter_label_set_attributes (ClutterLabel *label, PangoAttrList *attrs) { g_return_if_fail (CLUTTER_IS_LABEL (label)); clutter_label_set_attributes_internal (label, attrs); clutter_label_clear_layout (label); if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(label))) clutter_actor_queue_redraw (CLUTTER_ACTOR(label)); } /** * clutter_label_get_attributes: * @label: a #ClutterLabel * * Gets the attribute list that was set on the label using * clutter_label_set_attributes(), if any. * * Return value: the attribute list, or %NULL if none was set. * * Since: 0.2 **/ PangoAttrList * clutter_label_get_attributes (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), NULL); return label->priv->attrs; } /** * clutter_label_set_use_markup: * @label: a #ClutterLabel * @setting: %TRUE if the label's text should be parsed for markup. * * Sets whether the text of the label contains markup in Pango's text markup * language. See clutter_label_set_markup(). **/ void clutter_label_set_use_markup (ClutterLabel *label, gboolean setting) { g_return_if_fail (CLUTTER_IS_LABEL (label)); if (label->priv->use_markup != setting) { label->priv->use_markup = setting; clutter_label_clear_layout (label); if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(label))) clutter_actor_queue_redraw (CLUTTER_ACTOR(label)); g_object_notify (G_OBJECT (label), "use-markup"); } } /** * clutter_label_get_use_markup: * @label: a #ClutterLabel * * Returns whether the label's text is interpreted as marked up with * the Pango text markup * language. See clutter_label_set_use_markup (). * * Return value: %TRUE if the label's text will be parsed for markup. **/ gboolean clutter_label_get_use_markup (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), FALSE); return label->priv->use_markup; } /** * clutter_label_set_alignment: * @label: a #ClutterLabel * @alignment: A #PangoAlignment * * Sets text alignment of the label. **/ void clutter_label_set_alignment (ClutterLabel *label, PangoAlignment alignment) { g_return_if_fail (CLUTTER_IS_LABEL (label)); if (label->priv->alignment != alignment) { label->priv->alignment = alignment; clutter_label_clear_layout (label); if (CLUTTER_ACTOR_IS_VISIBLE (CLUTTER_ACTOR(label))) clutter_actor_queue_redraw (CLUTTER_ACTOR(label)); g_object_notify (G_OBJECT (label), "alignment"); } } /** * clutter_label_get_alignment: * @label: a #ClutterLabel * * Returns the label's text alignment * * Return value: The labels #PangoAlignment * * Since 0.2 **/ gboolean clutter_label_get_alignment (ClutterLabel *label) { g_return_val_if_fail (CLUTTER_IS_LABEL (label), FALSE); return label->priv->alignment; }