Text Attributes: Pango Reference Manual

## Text Attributes Text Attributes — Font and other attributes for annotating text |

## Functions

gboolean | pango_parse_markup ()
GMarkupParseContext * | pango_markup_parser_new ()
gboolean | pango_markup_parser_finish ()
PangoAttrType | pango_attr_type_register ()
const char * | pango_attr_type_get_name ()
void | pango_attribute_init ()
PangoAttribute * | pango_attribute_copy ()
gboolean | pango_attribute_equal ()
void | pango_attribute_destroy ()
PangoAttribute * | pango_attr_language_new ()
PangoAttribute * | pango_attr_family_new ()
PangoAttribute * | pango_attr_style_new ()
PangoAttribute * | pango_attr_variant_new ()
PangoAttribute * | pango_attr_stretch_new ()
PangoAttribute * | pango_attr_weight_new ()
PangoAttribute * | pango_attr_size_new ()
PangoAttribute * | pango_attr_size_new_absolute ()
PangoAttribute * | pango_attr_font_desc_new ()
PangoAttribute * | pango_attr_foreground_new ()
PangoAttribute * | pango_attr_background_new ()
PangoAttribute * | pango_attr_strikethrough_new ()
PangoAttribute * | pango_attr_strikethrough_color_new ()
PangoAttribute * | pango_attr_underline_new ()
PangoAttribute * | pango_attr_underline_color_new ()
PangoAttribute * | pango_attr_shape_new ()
PangoAttribute * | pango_attr_shape_new_with_data ()
gpointer | (*PangoAttrDataCopyFunc) ()
PangoAttribute * | pango_attr_scale_new ()
PangoAttribute * | pango_attr_rise_new ()
PangoAttribute * | pango_attr_letter_spacing_new ()
PangoAttribute * | pango_attr_fallback_new ()
PangoAttribute * | pango_attr_gravity_new ()
PangoAttribute * | pango_attr_gravity_hint_new ()
PangoAttribute * | pango_attr_font_features_new ()
PangoAttribute * | pango_attr_foreground_alpha_new ()
PangoAttribute * | pango_attr_background_alpha_new ()
gboolean | pango_color_parse ()
PangoColor * | pango_color_copy ()
void | pango_color_free ()
gchar * | pango_color_to_string ()
PangoAttrList * | pango_attr_list_new ()
PangoAttrList * | pango_attr_list_ref ()
void | pango_attr_list_unref ()
PangoAttrList * | pango_attr_list_copy ()
void | pango_attr_list_insert ()
void | pango_attr_list_insert_before ()
void | pango_attr_list_change ()
void | pango_attr_list_splice ()
PangoAttrList * | pango_attr_list_filter ()
gboolean | (*PangoAttrFilterFunc) ()
PangoAttrIterator * | pango_attr_list_get_iterator ()
PangoAttrIterator * | pango_attr_iterator_copy ()
gboolean | pango_attr_iterator_next ()
void | pango_attr_iterator_range ()
PangoAttribute * | pango_attr_iterator_get ()
void | pango_attr_iterator_get_font ()
GSList * | pango_attr_iterator_get_attrs ()
void | pango_attr_iterator_destroy ()

## Types and Values

enum | PangoAttrType
#define | PANGO_TYPE_ATTR_TYPE
struct | PangoAttrClass
struct | PangoAttribute
#define | PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING
#define | PANGO_ATTR_INDEX_TO_TEXT_END
struct | PangoAttrString
struct | PangoAttrLanguage
struct | PangoAttrColor
struct | PangoAttrInt
struct | PangoAttrFloat
struct | PangoAttrFontDesc
struct | PangoAttrShape
struct | PangoAttrSize
struct | PangoAttrFontFeatures
enum | PangoUnderline
#define | PANGO_TYPE_UNDERLINE
#define | PANGO_SCALE_XX_SMALL
#define | PANGO_SCALE_X_SMALL
#define | PANGO_SCALE_SMALL
#define | PANGO_SCALE_MEDIUM
#define | PANGO_SCALE_LARGE
#define | PANGO_SCALE_X_LARGE
#define | PANGO_SCALE_XX_LARGE
struct | PangoColor
#define | PANGO_TYPE_COLOR
| PangoAttrList
#define | PANGO_TYPE_ATTR_LIST
| PangoAttrIterator

## Object Hierarchy

        GBoxed
        ├── PangoAttrList
        ╰── PangoColor
        GEnum
        ├── PangoAttrType
        ╰── PangoUnderline

## Description

Attributed text is used in a number of places in Pango. It is used as the input to the itemization process and also when creating a PangoLayout. The data types and functions in this section are used to represent and manipulate sets of attributes applied to a portion of text.

## Functions

### pango_parse_markup ()

    gboolean
    pango_parse_markup (const char *markup_text,
                        int length,
                        gunichar accel_marker,
                        PangoAttrList **attr_list,
                        char **text,
                        gunichar *accel_char,
                        GError **error);

Parses marked-up text (see

markup format) to create

a plain-text string and an attribute list.

If `accel_marker` is nonzero, the given character will mark the character following it as an accelerator. For example, `accel_marker` might be an ampersand or underscore. All characters marked as an accelerator will receive a `PANGO_UNDERLINE_LOW` attribute, and the first character so marked will be returned in `accel_char` . Two `accel_marker` characters following each other produce a single literal `accel_marker` character.

To parse a stream of pango markup incrementally, use `pango_markup_parser_new()`.

If any error happens, none of the output arguments are touched except for `error` .

#### Parameters

markup_text | markup to parse (see markup format) |
length | length of `markup_text` , or -1 if nul-terminated |
accel_marker | character that precedes an accelerator, or 0 for none |
attr_list | address of return location for a PangoAttrList, or `NULL`. | [out][allow-none]
text | address of return location for text with tags stripped, or `NULL`. | [out][allow-none]
accel_char | address of return location for accelerator char, or `NULL`. | [out][allow-none]
error | address of return location for errors, or `NULL` |

#### Returns

`FALSE` if `error` is set, otherwise `TRUE`

### pango_markup_parser_new ()

    GMarkupParseContext *
    pango_markup_parser_new (gunichar accel_marker);

Parses marked-up text (see

markup format) to create

a plain-text string and an attribute list.

If `accel_marker` is nonzero, the given character will mark the character following it as an accelerator. For example, `accel_marker` might be an ampersand or underscore. All characters marked as an accelerator will receive a `PANGO_UNDERLINE_LOW` attribute, and the first character so marked will be returned in `accel_char` , when calling `finish()`. Two `accel_marker` characters following each other produce a single literal `accel_marker` character.

To feed markup to the parser, use `g_markup_parse_context_parse()` on the returned GMarkupParseContext. When done with feeding markup to the parser, use `pango_markup_parser_finish()` to get the data out of it, and then use `g_markup_parse_context_free()` to free it.

This function is designed for applications that read pango markup from streams. To simply parse a string containing pango markup, the simpler `pango_parse_markup()` API is recommended instead.

#### Parameters

accel_marker | character that precedes an accelerator, or 0 for none |

#### Returns

a GMarkupParseContext that should be destroyed with `g_markup_parse_context_free()`.

[transfer none]

Since: 1.31.0

### pango_markup_parser_finish ()

    gboolean
    pango_markup_parser_finish (GMarkupParseContext *context,
                                PangoAttrList **attr_list,
                                char **text,
                                gunichar *accel_char,
                                GError **error);

After feeding a pango markup parser some data with `g_markup_parse_context_parse()`, use this function to get the list of pango attributes and text out of the markup. This function will not free `context` , use `g_markup_parse_context_free()` to do so.

#### Parameters

context | A valid parse context that was returned from `pango_markup_parser_new()` |
attr_list | address of return location for a PangoAttrList, or `NULL`. | [out][allow-none]
text | address of return location for text with tags stripped, or `NULL`. | [out][allow-none]
accel_char | address of return location for accelerator char, or `NULL`. | [out][allow-none]
error | address of return location for errors, or `NULL` |

#### Returns

`FALSE` if `error` is set, otherwise `TRUE`

Since: 1.31.0

### pango_attr_type_register ()

    PangoAttrType
    pango_attr_type_register (const gchar *name);

Allocate a new attribute type ID. The attribute type name can be accessed later by using `pango_attr_type_get_name()`.

#### Parameters

name | an identifier for the type |

#### Returns

the new type ID.

### pango_attr_type_get_name ()

    const char *
    pango_attr_type_get_name (PangoAttrType type);

Fetches the attribute type name passed in when registering the type using `pango_attr_type_register()`.

The returned value is an interned string (see `g_intern_string()` for what that means) that should not be modified or freed.

#### Parameters

type | an attribute type ID to fetch the name for |

#### Returns

the type ID name (which may be `NULL`), or `NULL` if `type` is a built-in Pango attribute type or invalid.

[nullable]

Since: 1.22

### pango_attribute_init ()

    void
    pango_attribute_init (PangoAttribute *attr,
                          const PangoAttrClass *klass);

Initializes `attr` 's klass to `klass` , it's start_index to `PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING` and end_index to `PANGO_ATTR_INDEX_TO_TEXT_END` such that the attribute applies to the entire text by default.

#### Parameters

attr | a PangoAttribute |
klass | a PangoAttrClass |

Since: 1.20

### pango_attribute_copy ()

    PangoAttribute *
    pango_attribute_copy (const PangoAttribute *attr);

Make a copy of an attribute.

#### Parameters

attr | a PangoAttribute |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attribute_equal ()

    gboolean
    pango_attribute_equal (const PangoAttribute *attr1,
                           const PangoAttribute *attr2);

Compare two attributes for equality. This compares only the actual value of the two attributes and not the ranges that the attributes apply to.

#### Parameters

attr1 | a PangoAttribute |
attr2 | another PangoAttribute |

#### Returns

`TRUE` if the two attributes have the same value.

### pango_attribute_destroy ()

    void
    pango_attribute_destroy (PangoAttribute *attr);

Destroy a PangoAttribute and free all associated memory.

#### Parameters

attr | a PangoAttribute. |

### pango_attr_language_new ()

    PangoAttribute *
    pango_attr_language_new (PangoLanguage *language);

Create a new language tag attribute.

#### Parameters

language | language tag |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_family_new ()

    PangoAttribute *
    pango_attr_family_new (const char *family);

Create a new font family attribute.

#### Parameters

family | the family or comma separated list of families |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_style_new ()

    PangoAttribute *
    pango_attr_style_new (PangoStyle style);

Create a new font slant style attribute.

#### Parameters

style | the slant style |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_variant_new ()

    PangoAttribute *
    pango_attr_variant_new (PangoVariant variant);

Create a new font variant attribute (normal or small caps)

#### Parameters

variant | the variant |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_stretch_new ()

    PangoAttribute *
    pango_attr_stretch_new (PangoStretch stretch);

Create a new font stretch attribute

#### Parameters

stretch | the stretch |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_weight_new ()

    PangoAttribute *
    pango_attr_weight_new (PangoWeight weight);

Create a new font weight attribute.

#### Parameters

weight | the weight |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_size_new ()

    PangoAttribute *
    pango_attr_size_new (int size);

Create a new font-size attribute in fractional points.

#### Parameters

size | the font size, in `PANGO_SCALE`ths of a point. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_size_new_absolute ()

    PangoAttribute *
    pango_attr_size_new_absolute (int size);

Create a new font-size attribute in device units.

#### Parameters

size | the font size, in `PANGO_SCALE`ths of a device unit. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

Since: 1.8

### pango_attr_font_desc_new ()

    PangoAttribute *
    pango_attr_font_desc_new (const PangoFontDescription *desc);

Create a new font description attribute. This attribute allows setting family, style, weight, variant, stretch, and size simultaneously.

#### Parameters

desc | the font description |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_foreground_new ()

    PangoAttribute *
    pango_attr_foreground_new (guint16 red,
                               guint16 green,
                               guint16 blue);

Create a new foreground color attribute.

#### Parameters

red | the red value (ranging from 0 to 65535) |
green | the green value |
blue | the blue value |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_background_new ()

    PangoAttribute *
    pango_attr_background_new (guint16 red,
                               guint16 green,
                               guint16 blue);

Create a new background color attribute.

#### Parameters

red | the red value (ranging from 0 to 65535) |
green | the green value |
blue | the blue value |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_strikethrough_new ()

    PangoAttribute *
    pango_attr_strikethrough_new (gboolean strikethrough);

Create a new strike-through attribute.

#### Parameters

strikethrough | `TRUE` if the text should be struck-through. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_strikethrough_color_new ()

    PangoAttribute *
    pango_attr_strikethrough_color_new (guint16 red,
                                        guint16 green,
                                        guint16 blue);

Create a new strikethrough color attribute. This attribute modifies the color of strikethrough lines. If not set, strikethrough lines will use the foreground color.

#### Parameters

red | the red value (ranging from 0 to 65535) |
green | the green value |
blue | the blue value |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.8

### pango_attr_underline_new ()

    PangoAttribute *
    pango_attr_underline_new (PangoUnderline underline);

Create a new underline-style attribute.

#### Parameters

underline | the underline style. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_underline_color_new ()

    PangoAttribute *
    pango_attr_underline_color_new (guint16 red,
                                    guint16 green,
                                    guint16 blue);

Create a new underline color attribute. This attribute modifies the color of underlines. If not set, underlines will use the foreground color.

#### Parameters

red | the red value (ranging from 0 to 65535) |
green | the green value |
blue | the blue value |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.8

### pango_attr_shape_new ()

    PangoAttribute *
    pango_attr_shape_new (const PangoRectangle *ink_rect,
                          const PangoRectangle *logical_rect);

Create a new shape attribute. A shape is used to impose a particular ink and logical rectangle on the result of shaping a particular glyph. This might be used, for instance, for embedding a picture or a widget inside a PangoLayout.

#### Parameters

ink_rect | ink rectangle to assign to each character |
logical_rect | logical rectangle to assign to each character |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_shape_new_with_data ()

    PangoAttribute *
    pango_attr_shape_new_with_data (const PangoRectangle *ink_rect,
                                    const PangoRectangle *logical_rect,
                                    gpointer data,
                                    PangoAttrDataCopyFunc copy_func,
                                    GDestroyNotify destroy_func);

Like `pango_attr_shape_new()`, but a user data pointer is also provided; this pointer can be accessed when later rendering the glyph.

#### Parameters

ink_rect | ink rectangle to assign to each character |
logical_rect | logical rectangle to assign to each character |
data | user data pointer |
copy_func | function to copy `data` when the attribute is copied. If `NULL`, `data` is simply copied as a pointer. | [allow-none]
destroy_func | function to free `data` when the attribute is freed, or `NULL`. | [allow-none]

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

Since: 1.8

### PangoAttrDataCopyFunc ()

    gpointer
    (*PangoAttrDataCopyFunc) (gconstpointer user_data);

Type of a function that can duplicate user data for an attribute.

#### Parameters

user_data | user data to copy |

#### Returns

new copy of `user_data` .

### pango_attr_scale_new ()

    PangoAttribute *
    pango_attr_scale_new (double scale_factor);

Create a new font size scale attribute. The base font for the affected text will have its size multiplied by `scale_factor` .

#### Parameters

scale_factor | factor to scale the font |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_rise_new ()

    PangoAttribute *
    pango_attr_rise_new (int rise);

Create a new baseline displacement attribute.

#### Parameters

rise | the amount that the text should be displaced vertically, in Pango units. Positive values displace the text upwards. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

### pango_attr_letter_spacing_new ()

    PangoAttribute *
    pango_attr_letter_spacing_new (int letter_spacing);

Create a new letter-spacing attribute.

#### Parameters

letter_spacing | amount of extra space to add between graphemes of the text, in Pango units. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.6

### pango_attr_fallback_new ()

    PangoAttribute *
    pango_attr_fallback_new (gboolean enable_fallback);

Create a new font fallback attribute.

If fallback is disabled, characters will only be used from the closest matching font on the system. No fallback will be done to other fonts on the system that might contain the characters in the text.

#### Parameters

enable_fallback | `TRUE` if we should fall back on other fonts for characters the active font is missing. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.4

### pango_attr_gravity_new ()

    PangoAttribute *
    pango_attr_gravity_new (PangoGravity gravity);

Create a new gravity attribute.

#### Parameters

gravity | the gravity value; should not be `PANGO_GRAVITY_AUTO`. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.16

### pango_attr_gravity_hint_new ()

    PangoAttribute *
    pango_attr_gravity_hint_new (PangoGravityHint hint);

Create a new gravity hint attribute.

#### Parameters

hint | the gravity hint value. |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.16

### pango_attr_font_features_new ()

    PangoAttribute *
    pango_attr_font_features_new (const gchar *features);

Create a new font features tag attribute.

#### Parameters

features | a string with OpenType font features, in CSS syntax |

#### Returns

the newly allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.38

### pango_attr_foreground_alpha_new ()

    PangoAttribute *
    pango_attr_foreground_alpha_new (guint16 alpha);

Create a new foreground alpha attribute.

#### Parameters

alpha | the alpha value, between 1 and 65536 |

#### Returns

the new allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.38

### pango_attr_background_alpha_new ()

    PangoAttribute *
    pango_attr_background_alpha_new (guint16 alpha);

Create a new background alpha attribute.

#### Parameters

alpha | the alpha value, between 1 and 65536 |

#### Returns

the new allocated PangoAttribute, which should be freed with `pango_attribute_destroy()`.

[transfer full]

Since: 1.38

### pango_color_parse ()

    gboolean
    pango_color_parse (PangoColor *color,
                       const char *spec);

Fill in the fields of a color from a string specification. The string can either one of a large set of standard names. (Taken from the CSS specification), or it can be a hexadecimal value in the form '#rgb' '#rrggbb' '#rrrgggbbb' or '#rrrrggggbbbb' where 'r', 'g' and 'b' are hex digits of the red, green, and blue components of the color, respectively. (White in the four forms is '#fff' '#ffffff' '#fffffffff' and '#ffffffffffff')

#### Parameters

color | a PangoColor structure in which to store the result, or `NULL`. | [nullable]
spec | a string specifying the new color |

#### Returns

`TRUE` if parsing of the specifier succeeded, otherwise false.

### pango_color_copy ()

    PangoColor *
    pango_color_copy (const PangoColor *src);

Creates a copy of `src` , which should be freed with `pango_color_free()`. Primarily used by language bindings, not that useful otherwise (since colors can just be copied by assignment in C).

#### Parameters

src | color to copy, may be `NULL`. | [nullable]

#### Returns

the newly allocated PangoColor, which should be freed with `pango_color_free()`, or `NULL` if `src` was `NULL`.

[nullable]

### pango_color_free ()

    void
    pango_color_free (PangoColor *color);

Frees a color allocated by `pango_color_copy()`.

#### Parameters

color | an allocated PangoColor, may be `NULL`. | [nullable]

### pango_color_to_string ()

    gchar *
    pango_color_to_string (const PangoColor *color);

Returns a textual specification of `color` in the hexadecimal form `#rrrrggggbbbb`, where `r`, `g` and `b` are hex digits representing the red, green, and blue components respectively.

#### Parameters

color | a PangoColor |

#### Returns

a newly-allocated text string that must be freed with `g_free()`.

Since: 1.16

### pango_attr_list_new ()

    PangoAttrList *
    pango_attr_list_new (void);

Create a new empty attribute list with a reference count of one.

#### Returns

the newly allocated PangoAttrList, which should be freed with `pango_attr_list_unref()`.

[transfer full]

### pango_attr_list_ref ()

    PangoAttrList *
    pango_attr_list_ref (PangoAttrList *list);

Increase the reference count of the given attribute list by one.

#### Parameters

list | a PangoAttrList, may be `NULL`. | [nullable]

#### Returns

The attribute list passed in

Since: 1.10

### pango_attr_list_unref ()

    void
    pango_attr_list_unref (PangoAttrList *list);

Decrease the reference count of the given attribute list by one. If the result is zero, free the attribute list and the attributes it contains.

#### Parameters

list | a PangoAttrList, may be `NULL`. | [nullable]

### pango_attr_list_copy ()

    PangoAttrList *
    pango_attr_list_copy (PangoAttrList *list);

Copy `list` and return an identical new list.

#### Parameters

list | a PangoAttrList, may be `NULL`. | [nullable]

#### Returns

the newly allocated PangoAttrList, with a reference count of one, which should be freed with `pango_attr_list_unref()`. Returns `NULL` if `list` was `NULL`.

[nullable]

### pango_attr_list_insert ()

    void
    pango_attr_list_insert (PangoAttrList *list,
                            PangoAttribute *attr);

Insert the given attribute into the PangoAttrList. It will be inserted after all other attributes with a matching `start_index` .

#### Parameters

list | a PangoAttrList |
attr | the attribute to insert. Ownership of this value is assumed by the list. | [transfer full]

### pango_attr_list_insert_before ()

    void
    pango_attr_list_insert_before (PangoAttrList *list,
                                   PangoAttribute *attr);

Insert the given attribute into the PangoAttrList. It will be inserted before all other attributes with a matching `start_index` .

#### Parameters

list | a PangoAttrList |
attr | the attribute to insert. Ownership of this value is assumed by the list. | [transfer full]

### pango_attr_list_change ()

    void
    pango_attr_list_change (PangoAttrList *list,
                            PangoAttribute *attr);

Insert the given attribute into the PangoAttrList. It will replace any attributes of the same type on that segment and be merged with any adjoining attributes that are identical.

This function is slower than `pango_attr_list_insert()` for creating a attribute list in order (potentially much slower for large lists). However, `pango_attr_list_insert()` is not suitable for continually changing a set of attributes since it never removes or combines existing attributes.

#### Parameters

list | a PangoAttrList |
attr | the attribute to insert. Ownership of this value is assumed by the list. | [transfer full]

### pango_attr_list_splice ()

    void
    pango_attr_list_splice (PangoAttrList *list,
                            PangoAttrList *other,
                            gint pos,
                            gint len);

This function opens up a hole in `list` , fills it in with attributes from the left, and then merges `other` on top of the hole.

This operation is equivalent to stretching every attribute that applies at position `pos` in `list` by an amount `len` , and then calling `pango_attr_list_change()` with a copy of each attribute in `other` in sequence (offset in position by `pos` ).

This operation proves useful for, for instance, inserting a pre-edit string in the middle of an edit buffer.

#### Parameters

list | a PangoAttrList |
other | another PangoAttrList |
pos | the position in `list` at which to insert `other` |
len | the length of the spliced segment. (Note that this must be specified since the attributes in `other` may only be present at some subsection of this range) |

### pango_attr_list_filter ()

    PangoAttrList *
    pango_attr_list_filter (PangoAttrList *list,
                            PangoAttrFilterFunc func,
                            gpointer data);

Given a PangoAttrList and callback function, removes any elements of `list` for which `func` returns `TRUE` and inserts them into a new list.

#### Parameters

list | a PangoAttrList |
func | callback function; returns `TRUE` if an attribute should be filtered out. | [scope call][closure data]
data | Data to be passed to `func` . | [closure]

#### Returns

the new PangoAttrList or `NULL` if no attributes of the given types were found.

[transfer full][nullable]

Since: 1.2

### PangoAttrFilterFunc ()

    gboolean
    (*PangoAttrFilterFunc) (PangoAttribute *attribute,
                            gpointer user_data);

Type of a function filtering a list of attributes.

#### Parameters

attribute | a Pango attribute |
user_data | user data passed to the function |

#### Returns

`TRUE` if the attribute should be selected for filtering, `FALSE` otherwise.

### pango_attr_list_get_iterator ()

    PangoAttrIterator *
    pango_attr_list_get_iterator (PangoAttrList *list);

Create a iterator initialized to the beginning of the list. `list` must not be modified until this iterator is freed.

#### Parameters

list | a PangoAttrList |

#### Returns

the newly allocated PangoAttrIterator, which should be freed with `pango_attr_iterator_destroy()`.

[transfer full]

### pango_attr_iterator_copy ()

    PangoAttrIterator *
    pango_attr_iterator_copy (PangoAttrIterator *iterator);

Copy a PangoAttrIterator

#### Parameters

iterator | a PangoAttrIterator. |

#### Returns

the newly allocated PangoAttrIterator, which should be freed with `pango_attr_iterator_destroy()`.

[transfer full]

### pango_attr_iterator_next ()

    gboolean
    pango_attr_iterator_next (PangoAttrIterator *iterator);

Advance the iterator until the next change of style.

#### Parameters

iterator | a PangoAttrIterator |

#### Returns

`FALSE` if the iterator is at the end of the list, otherwise `TRUE`

### pango_attr_iterator_range ()

    void
    pango_attr_iterator_range (PangoAttrIterator *iterator,
                               gint *start,
                               gint *end);

Get the range of the current segment. Note that the stored return values are signed, not unsigned like the values in PangoAttribute. To deal with this API oversight, stored return values that wouldn't fit into a signed integer are clamped to `G_MAXINT`.

#### Parameters

iterator | a PangoAttrIterator |
start | location to store the start of the range. | [out]
end | location to store the end of the range. | [out]

### pango_attr_iterator_get ()

    PangoAttribute *
    pango_attr_iterator_get (PangoAttrIterator *iterator,
                             PangoAttrType type);

Find the current attribute of a particular type at the iterator location. When multiple attributes of the same type overlap, the attribute whose range starts closest to the current location is used.

#### Parameters

iterator | a PangoAttrIterator |
type | the type of attribute to find. |

#### Returns

the current attribute of the given type, or `NULL` if no attribute of that type applies to the current location.

[nullable]

### pango_attr_iterator_get_font ()

    void
    pango_attr_iterator_get_font (PangoAttrIterator *iterator,
                                  PangoFontDescription *desc,
                                  PangoLanguage **language,
                                  GSList **extra_attrs);

Get the font and other attributes at the current iterator position.

#### Parameters

iterator | a PangoAttrIterator |
desc | a PangoFontDescription to fill in with the current values. The family name in this structure will be set using `pango_font_description_set_family_static()` using values from an attribute in the PangoAttrList associated with the iterator, so if you plan to keep it around, you must call: `pango_font_description_set_family (desc, pango_font_description_get_family (desc))`. |
language | if non-`NULL`, location to store language tag for item, or `NULL` if none is found. | [allow-none]
extra_attrs | if non-`NULL`, location in which to store a list of non-font attributes at the the current position; only the highest priority value of each attribute will be added to this list. In order to free this value, you must call `pango_attribute_destroy()` on each member. | [allow-none][element-type Pango.Attribute][transfer full]

### pango_attr_iterator_get_attrs ()

    GSList *
    pango_attr_iterator_get_attrs (PangoAttrIterator *iterator);

Gets a list of all attributes at the current position of the iterator.

#### Parameters

iterator | a PangoAttrIterator |

#### Returns

a list of all attributes for the current range. To free this value, call `pango_attribute_destroy()` on each value and `g_slist_free()` on the list.

[element-type Pango.Attribute][transfer full]

Since: 1.2

### pango_attr_iterator_destroy ()

    void
    pango_attr_iterator_destroy (PangoAttrIterator *iterator);

Destroy a PangoAttrIterator and free all associated memory.

#### Parameters

iterator | a PangoAttrIterator. |

## Types and Values

### enum PangoAttrType

The PangoAttrType distinguishes between different types of attributes. Along with the predefined values, it is possible to allocate additional values for custom attributes using `pango_attr_type_register()`. The predefined values are given below. The type of structure used to store the attribute is listed in parentheses after the description.

#### Members

PANGO_ATTR_INVALID | does not happen |
PANGO_ATTR_LANGUAGE | language (PangoAttrLanguage) |
PANGO_ATTR_FAMILY | font family name list (PangoAttrString) |
PANGO_ATTR_STYLE | font slant style (PangoAttrInt) |
PANGO_ATTR_WEIGHT | font weight (PangoAttrInt) |
PANGO_ATTR_VARIANT | font variant (normal or small caps) (PangoAttrInt) |
PANGO_ATTR_STRETCH | font stretch (PangoAttrInt) |
PANGO_ATTR_SIZE | font size in points scaled by `PANGO_SCALE` (PangoAttrInt) |
PANGO_ATTR_FONT_DESC | font description (PangoAttrFontDesc) |
PANGO_ATTR_FOREGROUND | foreground color (PangoAttrColor) |
PANGO_ATTR_BACKGROUND | background color (PangoAttrColor) |
PANGO_ATTR_UNDERLINE | whether the text has an underline (PangoAttrInt) |
PANGO_ATTR_STRIKETHROUGH | whether the text is struck-through (PangoAttrInt) |
PANGO_ATTR_RISE | baseline displacement (PangoAttrInt) |
PANGO_ATTR_SHAPE | shape (PangoAttrShape) |
PANGO_ATTR_SCALE | font size scale factor (PangoAttrFloat) |
PANGO_ATTR_FALLBACK | whether fallback is enabled (PangoAttrInt) |
PANGO_ATTR_LETTER_SPACING | letter spacing (PangoAttrInt) |
PANGO_ATTR_UNDERLINE_COLOR | underline color (PangoAttrColor) |
PANGO_ATTR_STRIKETHROUGH_COLOR | strikethrough color (PangoAttrColor) |
PANGO_ATTR_ABSOLUTE_SIZE | font size in pixels scaled by `PANGO_SCALE` (PangoAttrInt) |
PANGO_ATTR_GRAVITY | base text gravity (PangoAttrInt) |
PANGO_ATTR_GRAVITY_HINT | gravity hint (PangoAttrInt) |
PANGO_ATTR_FONT_FEATURES | OpenType font features (PangoAttrString). Since 1.38 |
PANGO_ATTR_FOREGROUND_ALPHA | foreground alpha (PangoAttrInt). Since 1.38 |
PANGO_ATTR_BACKGROUND_ALPHA | background alpha (PangoAttrInt). Since 1.38 |

### PANGO_TYPE_ATTR_TYPE

    #define PANGO_TYPE_ATTR_TYPE (pango_attr_type_get_type ())

### struct PangoAttrClass

    struct PangoAttrClass {
      PangoAttrType type;
      PangoAttribute * (*copy) (const PangoAttribute *attr);
      void             (*destroy) (PangoAttribute *attr);
      gboolean         (*equal) (const PangoAttribute *attr1, const PangoAttribute *attr2);
    };

The PangoAttrClass structure stores the type and operations for a particular type of attribute. The functions in this structure should not be called directly. Instead, one should use the wrapper functions provided for PangoAttribute.

#### Members

PangoAttrType `type`; | the type ID for this attribute |
`copy` () | function to duplicate an attribute of this type (see `pango_attribute_copy()`) |
`destroy` () | function to free an attribute of this type (see `pango_attribute_destroy()`) |
`equal` () | function to check two attributes of this type for equality (see `pango_attribute_equal()`) |

### struct PangoAttribute

    struct PangoAttribute {
      const PangoAttrClass *klass;
      guint start_index; /* in bytes */
      guint end_index; /* in bytes. The character at this index is not included */
    };

The PangoAttribute structure represents the common portions of all attributes. Particular types of attributes include this structure as their initial portion. The common portion of the attribute holds the range to which the value in the type-specific part of the attribute applies and should be initialized using `pango_attribute_init()`. By default an attribute will have an all-inclusive range of [0,`G_MAXUINT`].

#### Members

const PangoAttrClass *`klass`; | the class structure holding information about the type of the attribute |
guint `start_index`; | the start index of the range (in bytes). |
guint `end_index`; | end index of the range (in bytes). The character at this index is not included in the range. |

### PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING

    #define PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING 0

This value can be used to set the start_index member of a PangoAttribute such that the attribute covers from the beginning of the text.

Since: 1.24

### PANGO_ATTR_INDEX_TO_TEXT_END

    #define PANGO_ATTR_INDEX_TO_TEXT_END		G_MAXUINT

This value can be used to set the end_index member of a PangoAttribute such that the attribute covers to the end of the text.

Since: 1.24

### struct PangoAttrString

    struct PangoAttrString {
      PangoAttribute attr;
      char *value;
    };

The PangoAttrString structure is used to represent attributes with a string value.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
char *`value`; | the string which is the value of the attribute |

### struct PangoAttrLanguage

    struct PangoAttrLanguage {
      PangoAttribute attr;
      PangoLanguage *value;
    };

The PangoAttrLanguage structure is used to represent attributes that are languages.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
PangoLanguage *`value`; | the PangoLanguage which is the value of the attribute |

### struct PangoAttrColor

    struct PangoAttrColor {
      PangoAttribute attr;
      PangoColor color;
    };

The PangoAttrColor structure is used to represent attributes that are colors.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
PangoColor `color`; | the PangoColor which is the value of the attribute |

### struct PangoAttrInt

    struct PangoAttrInt {
      PangoAttribute attr;
      int value;
    };

The PangoAttrInt structure is used to represent attributes with an integer or enumeration value.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
int `value`; | the value of the attribute |

### struct PangoAttrFloat

    struct PangoAttrFloat {
      PangoAttribute attr;
      double value;
    };

The PangoAttrFloat structure is used to represent attributes with a float or double value.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
double `value`; | the value of the attribute |

### struct PangoAttrFontDesc

    struct PangoAttrFontDesc {
      PangoAttribute attr;
      PangoFontDescription *desc;
    };

The PangoAttrFontDesc structure is used to store an attribute that sets all aspects of the font description at once.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
PangoFontDescription *`desc`; | the font description which is the value of this attribute |

### struct PangoAttrShape

    struct PangoAttrShape {
      PangoAttribute attr;
      PangoRectangle ink_rect;
      PangoRectangle logical_rect;

      gpointer              data;
      PangoAttrDataCopyFunc copy_func;
      GDestroyNotify        destroy_func;
    };

The PangoAttrShape structure is used to represent attributes which impose shape restrictions.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
PangoRectangle `ink_rect`; | the ink rectangle to restrict to |
PangoRectangle `logical_rect`; | the logical rectangle to restrict to |
gpointer `data`; | user data set (see `pango_attr_shape_new_with_data()`) |
PangoAttrDataCopyFunc `copy_func`; | copy function for the user data |
GDestroyNotify `destroy_func`; | destroy function for the user data |

### struct PangoAttrSize

    struct PangoAttrSize {
      PangoAttribute attr;
      int size;
      guint absolute : 1;
    };

The PangoAttrSize structure is used to represent attributes which set font size.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
int `size`; | size of font, in units of 1/`PANGO_SCALE` of a point (for `PANGO_ATTR_SIZE`) or of a device uni (for `PANGO_ATTR_ABSOLUTE_SIZE`) |
guint `absolute` : 1; | whether the font size is in device units or points. This field is only present for compatibility with Pango-1.8.0 (`PANGO_ATTR_ABSOLUTE_SIZE` was added in 1.8.1); and always will be `FALSE` for `PANGO_ATTR_SIZE` and `TRUE` for `PANGO_ATTR_ABSOLUTE_SIZE`. |

### struct PangoAttrFontFeatures

    struct PangoAttrFontFeatures {
      PangoAttribute attr;
      gchar *features;
    };

The PangoAttrFontFeatures structure is used to represent OpenType font features as an attribute.

#### Members

PangoAttribute `attr`; | the common portion of the attribute |
gchar *`features`; | the featues, as a string in CSS syntax |

Since: 1.38

### enum PangoUnderline

The PangoUnderline enumeration is used to specify whether text should be underlined, and if so, the type of underlining.

#### Members

PANGO_UNDERLINE_NONE | no underline should be drawn |
PANGO_UNDERLINE_SINGLE | a single underline should be drawn |
PANGO_UNDERLINE_DOUBLE | a double underline should be drawn |
PANGO_UNDERLINE_LOW | a single underline should be drawn at a position beneath the ink extents of the text being underlined. This should be used only for underlining single characters, such as for keyboard accelerators. `PANGO_UNDERLINE_SINGLE` should be used for extended portions of text. |
PANGO_UNDERLINE_ERROR | a wavy underline should be drawn below. This underline is typically used to indicate an error such as a possilble mispelling; in some cases a contrasting color may automatically be used. This type of underlining is available since Pango 1.4. |

### PANGO_TYPE_UNDERLINE

    #define PANGO_TYPE_UNDERLINE (pango_underline_get_type ())

### PANGO_SCALE_XX_SMALL

    #define PANGO_SCALE_XX_SMALL ((double)0.5787037037037)

The scale factor for three shrinking steps (1 / (1.2 * 1.2 * 1.2)).

### PANGO_SCALE_X_SMALL

    #define PANGO_SCALE_X_SMALL  ((double)0.6444444444444)

The scale factor for two shrinking steps (1 / (1.2 * 1.2)).

### PANGO_SCALE_SMALL

    #define PANGO_SCALE_SMALL    ((double)0.8333333333333)

The scale factor for one shrinking step (1 / 1.2).

### PANGO_SCALE_MEDIUM

    #define PANGO_SCALE_MEDIUM   ((double)1.0)

The scale factor for normal size (1.0).

### PANGO_SCALE_LARGE

    #define PANGO_SCALE_LARGE    ((double)1.2)

The scale factor for one magnification step (1.2).

### PANGO_SCALE_X_LARGE

    #define PANGO_SCALE_X_LARGE  ((double)1.4399999999999)

The scale factor for two magnification steps (1.2 * 1.2).

### PANGO_SCALE_XX_LARGE

    #define PANGO_SCALE_XX_LARGE ((double)1.728)

The scale factor for three magnification steps (1.2 * 1.2 * 1.2).

### struct PangoColor

    struct PangoColor {
      guint16 red;
      guint16 green;
      guint16 blue;
    };

The PangoColor structure is used to represent a color in an uncalibrated RGB color-space.

#### Members

guint16 `red`; | value of red component |
guint16 `green`; | value of green component |
guint16 `blue`; | value of blue component |

### PANGO_TYPE_COLOR

    #define PANGO_TYPE_COLOR pango_color_get_type ()

The GObject type for PangoColor.

### PangoAttrList

    typedef struct _PangoAttrList PangoAttrList;

The PangoAttrList structure represents a list of attributes that apply to a section of text. The attributes are, in general, allowed to overlap in an arbitrary fashion, however, if the attributes are manipulated only through `pango_attr_list_change()`, the overlap between properties will meet stricter criteria.

Since the PangoAttrList structure is stored as a linear list, it is not suitable for storing attributes for large amounts of text. In general, you should not use a single PangoAttrList for more than one paragraph of text.

### PANGO_TYPE_ATTR_LIST

    #define PANGO_TYPE_ATTR_LIST pango_attr_list_get_type ()

The GObject type for PangoAttrList.

### PangoAttrIterator

    typedef struct _PangoAttrIterator PangoAttrIterator;

The PangoAttrIterator structure is used to represent an iterator through a PangoAttrList. A new iterator is created with `pango_attr_list_get_iterator()`. Once the iterator is created, it can be advanced through the style changes in the text using `pango_attr_iterator_next()`. At each style change, the range of the current style segment and the attributes currently in effect can be queried.