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authorMatthias Clasen <mclasen@redhat.com>2021-07-10 00:03:40 -0400
committerMatthias Clasen <mclasen@redhat.com>2021-08-01 23:25:13 -0400
commit34c8e9c1a5915a12c376508244df6a96a1bf7fbc (patch)
tree2535d451d20adc37357c41aec4b9a8b7e27da5f7
parent6735e96058a007da315670aef1bc770e816e5d98 (diff)
downloadpango-introspection-fixes.tar.gz
attributes: Add helper api for introspectionintrospection-fixes
Add functions to cast PangoAttribute to the various struct types, so language bindings can get at the payload. Fixes: #476
-rw-r--r--pango/pango-attributes.c254
-rw-r--r--pango/pango-attributes.h19
2 files changed, 273 insertions, 0 deletions
diff --git a/pango/pango-attributes.c b/pango/pango-attributes.c
index cb3d917d..1a4a9443 100644
--- a/pango/pango-attributes.c
+++ b/pango/pango-attributes.c
@@ -2496,3 +2496,257 @@ pango_attr_iterator_get_attrs (PangoAttrIterator *iterator)
return attrs;
}
+
+
+/**
+ * pango_attribute_as_int:
+ * @attr: A `PangoAttribute` such as weight
+ *
+ * Returns the attribute cast to `PangoAttrInt`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrInt`,
+ * or %NULL if it's not an integer attribute
+ *
+ * Since: 1.50
+ */
+PangoAttrInt *
+pango_attribute_as_int (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_STYLE:
+ case PANGO_ATTR_WEIGHT:
+ case PANGO_ATTR_VARIANT:
+ case PANGO_ATTR_STRETCH:
+ case PANGO_ATTR_UNDERLINE:
+ case PANGO_ATTR_STRIKETHROUGH:
+ case PANGO_ATTR_RISE:
+ case PANGO_ATTR_FALLBACK:
+ case PANGO_ATTR_LETTER_SPACING:
+ case PANGO_ATTR_GRAVITY:
+ case PANGO_ATTR_GRAVITY_HINT:
+ case PANGO_ATTR_FOREGROUND_ALPHA:
+ case PANGO_ATTR_BACKGROUND_ALPHA:
+ case PANGO_ATTR_ALLOW_BREAKS:
+ case PANGO_ATTR_SHOW:
+ case PANGO_ATTR_INSERT_HYPHENS:
+ case PANGO_ATTR_OVERLINE:
+ return (PangoAttrInt *)attr;
+
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * pango_attribute_as_float:
+ * @attr: A `PangoAttribute` such as scale
+ *
+ * Returns the attribute cast to `PangoAttrFloat`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrFloat`,
+ * or %NULL if it's not a floating point attribute
+ *
+ * Since: 1.50
+ */
+PangoAttrFloat *
+pango_attribute_as_float (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_SCALE:
+ return (PangoAttrFloat *)attr;
+
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * pango_attribute_as_string:
+ * @attr: A `PangoAttribute` such as family
+ *
+ * Returns the attribute cast to `PangoAttrString`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrString`,
+ * or %NULL if it's not a string attribute
+ */
+PangoAttrString *
+pango_attribute_as_string (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_FAMILY:
+ return (PangoAttrString *)attr;
+
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * pango_attribute_as_size:
+ * @attr: A `PangoAttribute` representing a size
+ *
+ * Returns the attribute cast to `PangoAttrSize`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrSize`,
+ * or NULL if it's not a size attribute
+ *
+ * Since: 1.50
+ */
+PangoAttrSize *
+pango_attribute_as_size (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_SIZE:
+ case PANGO_ATTR_ABSOLUTE_SIZE:
+ return (PangoAttrSize *)attr;
+
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * pango_attribute_as_color:
+ * @attr: A `PangoAttribute` such as foreground
+ *
+ * Returns the attribute cast to `PangoAttrColor`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrColor`,
+ * or %NULL if it's not a color attribute
+ *
+ * Since: 1.50
+ */
+PangoAttrColor *
+pango_attribute_as_color (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_FOREGROUND:
+ case PANGO_ATTR_BACKGROUND:
+ case PANGO_ATTR_UNDERLINE_COLOR:
+ case PANGO_ATTR_STRIKETHROUGH_COLOR:
+ case PANGO_ATTR_OVERLINE_COLOR:
+ return (PangoAttrColor *)attr;
+
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * pango_attribute_as_font_desc:
+ * @attr: A `PangoAttribute` representing a font description
+ *
+ * Returns the attribute cast to `PangoAttrFontDesc`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrFontDesc`,
+ * or %NULL if it's not a font description attribute
+ *
+ * Since: 1.50
+ */
+PangoAttrFontDesc *
+pango_attribute_as_font_desc (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_FONT_DESC:
+ return (PangoAttrFontDesc *)attr;
+
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * pango_attribute_as_font_features:
+ * @attr: A `PangoAttribute` representing font features
+ *
+ * Returns the attribute cast to `PangoAttrFontFeatures`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrFontFeatures`,
+ * or %NULL if it's not a font features attribute
+ *
+ * Since: 1.50
+ */
+PangoAttrFontFeatures *
+pango_attribute_as_font_features (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_FONT_FEATURES:
+ return (PangoAttrFontFeatures *)attr;
+
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * pango_attribute_as_language:
+ * @attr: A `PangoAttribute` representing a language
+ *
+ * Returns the attribute cast to `PangoAttrLanguage`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrLanguage`,
+ * or %NULL if it's not a language attribute
+ *
+ * Since: 1.50
+ */
+PangoAttrLanguage *
+pango_attribute_as_language (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_LANGUAGE:
+ return (PangoAttrLanguage *)attr;
+
+ default:
+ return NULL;
+ }
+}
+
+/**
+ * pango_attribute_as_shape:
+ * @attr: A `PangoAttribute` representing a shape
+ *
+ * Returns the attribute cast to `PangoAttrShape`.
+ *
+ * This is mainly useful for language bindings.
+ *
+ * Returns: (nullable) (transfer none): The attribute as `PangoAttrShape`,
+ * or %NULL if it's not a shape attribute
+ *
+ * Since: 1.50
+ */
+PangoAttrShape *
+pango_attribute_as_shape (PangoAttribute *attr)
+{
+ switch (attr->klass->type)
+ {
+ case PANGO_ATTR_SHAPE:
+ return (PangoAttrShape *)attr;
+
+ default:
+ return NULL;
+ }
+}
diff --git a/pango/pango-attributes.h b/pango/pango-attributes.h
index 3336eb53..6f18718e 100644
--- a/pango/pango-attributes.h
+++ b/pango/pango-attributes.h
@@ -699,6 +699,25 @@ gboolean pango_markup_parser_finish (GMarkupParseContext *context
gunichar *accel_char,
GError **error);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrString *pango_attribute_as_string (PangoAttribute *attr);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrLanguage *pango_attribute_as_language (PangoAttribute *attr);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrInt *pango_attribute_as_int (PangoAttribute *attr);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrSize *pango_attribute_as_size (PangoAttribute *attr);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrFloat *pango_attribute_as_float (PangoAttribute *attr);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrColor *pango_attribute_as_color (PangoAttribute *attr);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrFontDesc *pango_attribute_as_font_desc (PangoAttribute *attr);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrShape *pango_attribute_as_shape (PangoAttribute *attr);
+PANGO_AVAILABLE_IN_1_50
+PangoAttrFontFeatures *pango_attribute_as_font_features (PangoAttribute *attr);
+
G_END_DECLS
#endif /* __PANGO_ATTRIBUTES_H__ */