599 lines
21 KiB
C
599 lines
21 KiB
C
/* Pango
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* pango-attributes.h: Attributed text
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*
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* Copyright (C) 2000 Red Hat Software
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __PANGO_ATTRIBUTES_H__
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#define __PANGO_ATTRIBUTES_H__
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#include <pango/pango-font.h>
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#include <glib-object.h>
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G_BEGIN_DECLS
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/* PangoColor */
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typedef struct _PangoColor PangoColor;
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/**
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* PangoColor:
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* @red: value of red component
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* @green: value of green component
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* @blue: value of blue component
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*
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* The #PangoColor structure is used to
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* represent a color in an uncalibrated RGB color-space.
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*/
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struct _PangoColor
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{
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guint16 red;
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guint16 green;
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guint16 blue;
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};
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/**
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* PANGO_TYPE_COLOR:
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*
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* The #GObject type for #PangoColor.
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*/
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#define PANGO_TYPE_COLOR pango_color_get_type ()
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PANGO_AVAILABLE_IN_ALL
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GType pango_color_get_type (void) G_GNUC_CONST;
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PANGO_AVAILABLE_IN_ALL
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PangoColor *pango_color_copy (const PangoColor *src);
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PANGO_AVAILABLE_IN_ALL
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void pango_color_free (PangoColor *color);
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PANGO_AVAILABLE_IN_ALL
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gboolean pango_color_parse (PangoColor *color,
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const char *spec);
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PANGO_AVAILABLE_IN_1_16
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gchar *pango_color_to_string(const PangoColor *color);
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/* Attributes */
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typedef struct _PangoAttribute PangoAttribute;
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typedef struct _PangoAttrClass PangoAttrClass;
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typedef struct _PangoAttrString PangoAttrString;
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typedef struct _PangoAttrLanguage PangoAttrLanguage;
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typedef struct _PangoAttrInt PangoAttrInt;
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typedef struct _PangoAttrSize PangoAttrSize;
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typedef struct _PangoAttrFloat PangoAttrFloat;
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typedef struct _PangoAttrColor PangoAttrColor;
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typedef struct _PangoAttrFontDesc PangoAttrFontDesc;
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typedef struct _PangoAttrShape PangoAttrShape;
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typedef struct _PangoAttrFontFeatures PangoAttrFontFeatures;
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/**
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* PANGO_TYPE_ATTR_LIST:
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*
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* The #GObject type for #PangoAttrList.
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*/
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#define PANGO_TYPE_ATTR_LIST pango_attr_list_get_type ()
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/**
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* PangoAttrIterator:
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*
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* The #PangoAttrIterator structure is used to represent an
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* iterator through a #PangoAttrList. A new iterator is created
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* with pango_attr_list_get_iterator(). Once the iterator
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* is created, it can be advanced through the style changes
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* in the text using pango_attr_iterator_next(). At each
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* style change, the range of the current style segment and the
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* attributes currently in effect can be queried.
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*/
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/**
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* PangoAttrList:
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*
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* The #PangoAttrList structure represents a list of attributes
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* that apply to a section of text. The attributes are, in general,
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* allowed to overlap in an arbitrary fashion, however, if the
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* attributes are manipulated only through pango_attr_list_change(),
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* the overlap between properties will meet stricter criteria.
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*
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* Since the #PangoAttrList structure is stored as a linear list,
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* it is not suitable for storing attributes for large amounts
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* of text. In general, you should not use a single #PangoAttrList
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* for more than one paragraph of text.
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*/
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typedef struct _PangoAttrList PangoAttrList;
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typedef struct _PangoAttrIterator PangoAttrIterator;
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/**
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* PangoAttrType:
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* @PANGO_ATTR_INVALID: does not happen
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* @PANGO_ATTR_LANGUAGE: language (#PangoAttrLanguage)
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* @PANGO_ATTR_FAMILY: font family name list (#PangoAttrString)
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* @PANGO_ATTR_STYLE: font slant style (#PangoAttrInt)
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* @PANGO_ATTR_WEIGHT: font weight (#PangoAttrInt)
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* @PANGO_ATTR_VARIANT: font variant (normal or small caps) (#PangoAttrInt)
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* @PANGO_ATTR_STRETCH: font stretch (#PangoAttrInt)
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* @PANGO_ATTR_SIZE: font size in points scaled by %PANGO_SCALE (#PangoAttrInt)
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* @PANGO_ATTR_FONT_DESC: font description (#PangoAttrFontDesc)
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* @PANGO_ATTR_FOREGROUND: foreground color (#PangoAttrColor)
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* @PANGO_ATTR_BACKGROUND: background color (#PangoAttrColor)
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* @PANGO_ATTR_UNDERLINE: whether the text has an underline (#PangoAttrInt)
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* @PANGO_ATTR_STRIKETHROUGH: whether the text is struck-through (#PangoAttrInt)
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* @PANGO_ATTR_RISE: baseline displacement (#PangoAttrInt)
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* @PANGO_ATTR_SHAPE: shape (#PangoAttrShape)
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* @PANGO_ATTR_SCALE: font size scale factor (#PangoAttrFloat)
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* @PANGO_ATTR_FALLBACK: whether fallback is enabled (#PangoAttrInt)
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* @PANGO_ATTR_LETTER_SPACING: letter spacing (#PangoAttrInt)
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* @PANGO_ATTR_UNDERLINE_COLOR: underline color (#PangoAttrColor)
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* @PANGO_ATTR_STRIKETHROUGH_COLOR: strikethrough color (#PangoAttrColor)
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* @PANGO_ATTR_ABSOLUTE_SIZE: font size in pixels scaled by %PANGO_SCALE (#PangoAttrInt)
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* @PANGO_ATTR_GRAVITY: base text gravity (#PangoAttrInt)
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* @PANGO_ATTR_GRAVITY_HINT: gravity hint (#PangoAttrInt)
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* @PANGO_ATTR_FONT_FEATURES: OpenType font features (#PangoAttrString). Since 1.38
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* @PANGO_ATTR_FOREGROUND_ALPHA: foreground alpha (#PangoAttrInt). Since 1.38
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* @PANGO_ATTR_BACKGROUND_ALPHA: background alpha (#PangoAttrInt). Since 1.38
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*
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* The #PangoAttrType
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* distinguishes between different types of attributes. Along with the
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* predefined values, it is possible to allocate additional values
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* for custom attributes using pango_attr_type_register(). The predefined
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* values are given below. The type of structure used to store the
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* attribute is listed in parentheses after the description.
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*/
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typedef enum
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{
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PANGO_ATTR_INVALID, /* 0 is an invalid attribute type */
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PANGO_ATTR_LANGUAGE, /* PangoAttrLanguage */
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PANGO_ATTR_FAMILY, /* PangoAttrString */
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PANGO_ATTR_STYLE, /* PangoAttrInt */
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PANGO_ATTR_WEIGHT, /* PangoAttrInt */
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PANGO_ATTR_VARIANT, /* PangoAttrInt */
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PANGO_ATTR_STRETCH, /* PangoAttrInt */
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PANGO_ATTR_SIZE, /* PangoAttrSize */
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PANGO_ATTR_FONT_DESC, /* PangoAttrFontDesc */
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PANGO_ATTR_FOREGROUND, /* PangoAttrColor */
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PANGO_ATTR_BACKGROUND, /* PangoAttrColor */
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PANGO_ATTR_UNDERLINE, /* PangoAttrInt */
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PANGO_ATTR_STRIKETHROUGH, /* PangoAttrInt */
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PANGO_ATTR_RISE, /* PangoAttrInt */
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PANGO_ATTR_SHAPE, /* PangoAttrShape */
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PANGO_ATTR_SCALE, /* PangoAttrFloat */
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PANGO_ATTR_FALLBACK, /* PangoAttrInt */
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PANGO_ATTR_LETTER_SPACING, /* PangoAttrInt */
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PANGO_ATTR_UNDERLINE_COLOR, /* PangoAttrColor */
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PANGO_ATTR_STRIKETHROUGH_COLOR,/* PangoAttrColor */
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PANGO_ATTR_ABSOLUTE_SIZE, /* PangoAttrSize */
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PANGO_ATTR_GRAVITY, /* PangoAttrInt */
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PANGO_ATTR_GRAVITY_HINT, /* PangoAttrInt */
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PANGO_ATTR_FONT_FEATURES, /* PangoAttrString */
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PANGO_ATTR_FOREGROUND_ALPHA, /* PangoAttrInt */
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PANGO_ATTR_BACKGROUND_ALPHA /* PangoAttrInt */
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} PangoAttrType;
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/**
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* PangoUnderline:
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* @PANGO_UNDERLINE_NONE: no underline should be drawn
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* @PANGO_UNDERLINE_SINGLE: a single underline should be drawn
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* @PANGO_UNDERLINE_DOUBLE: a double underline should be drawn
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* @PANGO_UNDERLINE_LOW: a single underline should be drawn at a position
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* beneath the ink extents of the text being
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* underlined. This should be used only for underlining
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* single characters, such as for keyboard
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* accelerators. %PANGO_UNDERLINE_SINGLE should
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* be used for extended portions of text.
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* @PANGO_UNDERLINE_ERROR: a wavy underline should be drawn below.
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* This underline is typically used to indicate
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* an error such as a possilble mispelling; in some
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* cases a contrasting color may automatically
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* be used. This type of underlining is available since Pango 1.4.
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*
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* The #PangoUnderline enumeration is used to specify
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* whether text should be underlined, and if so, the type
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* of underlining.
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*/
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typedef enum {
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PANGO_UNDERLINE_NONE,
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PANGO_UNDERLINE_SINGLE,
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PANGO_UNDERLINE_DOUBLE,
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PANGO_UNDERLINE_LOW,
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PANGO_UNDERLINE_ERROR
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} PangoUnderline;
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/**
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* PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING:
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*
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* This value can be used to set the start_index member of a #PangoAttribute
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* such that the attribute covers from the beginning of the text.
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*
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* Since: 1.24
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*/
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/**
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* PANGO_ATTR_INDEX_TO_TEXT_END:
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*
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* This value can be used to set the end_index member of a #PangoAttribute
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* such that the attribute covers to the end of the text.
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*
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* Since: 1.24
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*/
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#define PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING 0
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#define PANGO_ATTR_INDEX_TO_TEXT_END G_MAXUINT
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/**
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* PangoAttribute:
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* @klass: the class structure holding information about the type of the attribute
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* @start_index: the start index of the range (in bytes).
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* @end_index: end index of the range (in bytes). The character at this index
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* is not included in the range.
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*
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* The #PangoAttribute structure represents the common portions of all
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* attributes. Particular types of attributes include this structure
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* as their initial portion. The common portion of the attribute holds
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* the range to which the value in the type-specific part of the attribute
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* applies and should be initialized using pango_attribute_init().
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* By default an attribute will have an all-inclusive range of [0,%G_MAXUINT].
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*/
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struct _PangoAttribute
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{
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const PangoAttrClass *klass;
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guint start_index; /* in bytes */
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guint end_index; /* in bytes. The character at this index is not included */
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};
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/**
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* PangoAttrFilterFunc:
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* @attribute: a Pango attribute
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* @user_data: user data passed to the function
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*
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* Type of a function filtering a list of attributes.
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*
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* Return value: %TRUE if the attribute should be selected for
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* filtering, %FALSE otherwise.
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**/
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typedef gboolean (*PangoAttrFilterFunc) (PangoAttribute *attribute,
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gpointer user_data);
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/**
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* PangoAttrDataCopyFunc:
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* @user_data: user data to copy
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*
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* Type of a function that can duplicate user data for an attribute.
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*
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* Return value: new copy of @user_data.
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**/
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typedef gpointer (*PangoAttrDataCopyFunc) (gconstpointer user_data);
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/**
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* PangoAttrClass:
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* @type: the type ID for this attribute
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* @copy: function to duplicate an attribute of this type (see pango_attribute_copy())
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* @destroy: function to free an attribute of this type (see pango_attribute_destroy())
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* @equal: function to check two attributes of this type for equality (see pango_attribute_equal())
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*
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* The #PangoAttrClass structure stores the type and operations for
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* a particular type of attribute. The functions in this structure should
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* not be called directly. Instead, one should use the wrapper functions
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* provided for #PangoAttribute.
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*/
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struct _PangoAttrClass
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{
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/*< public >*/
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PangoAttrType type;
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PangoAttribute * (*copy) (const PangoAttribute *attr);
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void (*destroy) (PangoAttribute *attr);
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gboolean (*equal) (const PangoAttribute *attr1, const PangoAttribute *attr2);
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};
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/**
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* PangoAttrString:
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* @attr: the common portion of the attribute
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* @value: the string which is the value of the attribute
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*
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* The #PangoAttrString structure is used to represent attributes with
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* a string value.
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*/
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struct _PangoAttrString
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{
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PangoAttribute attr;
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char *value;
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};
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/**
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* PangoAttrLanguage:
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* @attr: the common portion of the attribute
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* @value: the #PangoLanguage which is the value of the attribute
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*
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* The #PangoAttrLanguage structure is used to represent attributes that
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* are languages.
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*/
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struct _PangoAttrLanguage
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{
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PangoAttribute attr;
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PangoLanguage *value;
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};
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/**
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* PangoAttrInt:
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* @attr: the common portion of the attribute
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* @value: the value of the attribute
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*
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* The #PangoAttrInt structure is used to represent attributes with
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* an integer or enumeration value.
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*/
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struct _PangoAttrInt
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{
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PangoAttribute attr;
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int value;
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};
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/**
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* PangoAttrFloat:
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* @attr: the common portion of the attribute
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* @value: the value of the attribute
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*
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* The #PangoAttrFloat structure is used to represent attributes with
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* a float or double value.
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*/
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struct _PangoAttrFloat
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{
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PangoAttribute attr;
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double value;
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};
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/**
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* PangoAttrColor:
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* @attr: the common portion of the attribute
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* @color: the #PangoColor which is the value of the attribute
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*
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* The #PangoAttrColor structure is used to represent attributes that
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* are colors.
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*/
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struct _PangoAttrColor
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{
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PangoAttribute attr;
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PangoColor color;
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};
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/**
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* PangoAttrSize:
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* @attr: the common portion of the attribute
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* @size: size of font, in units of 1/%PANGO_SCALE of a point (for
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* %PANGO_ATTR_SIZE) or of a device uni (for %PANGO_ATTR_ABSOLUTE_SIZE)
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* @absolute: whether the font size is in device units or points.
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* This field is only present for compatibility with Pango-1.8.0
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* (%PANGO_ATTR_ABSOLUTE_SIZE was added in 1.8.1); and always will
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* be %FALSE for %PANGO_ATTR_SIZE and %TRUE for %PANGO_ATTR_ABSOLUTE_SIZE.
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*
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* The #PangoAttrSize structure is used to represent attributes which
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* set font size.
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*/
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struct _PangoAttrSize
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{
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PangoAttribute attr;
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int size;
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guint absolute : 1;
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};
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/**
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* PangoAttrShape:
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* @attr: the common portion of the attribute
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* @ink_rect: the ink rectangle to restrict to
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* @logical_rect: the logical rectangle to restrict to
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* @data: user data set (see pango_attr_shape_new_with_data())
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* @copy_func: copy function for the user data
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* @destroy_func: destroy function for the user data
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*
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* The #PangoAttrShape structure is used to represent attributes which
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* impose shape restrictions.
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*/
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struct _PangoAttrShape
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{
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PangoAttribute attr;
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PangoRectangle ink_rect;
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PangoRectangle logical_rect;
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gpointer data;
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PangoAttrDataCopyFunc copy_func;
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GDestroyNotify destroy_func;
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};
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/**
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* PangoAttrFontDesc:
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* @attr: the common portion of the attribute
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* @desc: the font description which is the value of this attribute
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*
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* The #PangoAttrFontDesc structure is used to store an attribute that
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* sets all aspects of the font description at once.
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*/
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struct _PangoAttrFontDesc
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{
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PangoAttribute attr;
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PangoFontDescription *desc;
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};
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/**
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* PangoAttrFontFeatures:
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* @attr: the common portion of the attribute
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* @features: the featues, as a string in CSS syntax
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*
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* The #PangoAttrFontFeatures structure is used to represent OpenType
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* font features as an attribute.
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*
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* Since: 1.38
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*/
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struct _PangoAttrFontFeatures
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{
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PangoAttribute attr;
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gchar *features;
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};
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PANGO_AVAILABLE_IN_ALL
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PangoAttrType pango_attr_type_register (const gchar *name);
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PANGO_AVAILABLE_IN_1_22
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const char * pango_attr_type_get_name (PangoAttrType type) G_GNUC_CONST;
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PANGO_AVAILABLE_IN_1_20
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void pango_attribute_init (PangoAttribute *attr,
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const PangoAttrClass *klass);
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute * pango_attribute_copy (const PangoAttribute *attr);
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PANGO_AVAILABLE_IN_ALL
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void pango_attribute_destroy (PangoAttribute *attr);
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PANGO_AVAILABLE_IN_ALL
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gboolean pango_attribute_equal (const PangoAttribute *attr1,
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const PangoAttribute *attr2) G_GNUC_PURE;
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute *pango_attr_language_new (PangoLanguage *language);
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute *pango_attr_family_new (const char *family);
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute *pango_attr_foreground_new (guint16 red,
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guint16 green,
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guint16 blue);
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute *pango_attr_background_new (guint16 red,
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guint16 green,
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guint16 blue);
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute *pango_attr_size_new (int size);
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PANGO_AVAILABLE_IN_1_8
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PangoAttribute *pango_attr_size_new_absolute (int size);
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute *pango_attr_style_new (PangoStyle style);
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute *pango_attr_weight_new (PangoWeight weight);
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PANGO_AVAILABLE_IN_ALL
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PangoAttribute *pango_attr_variant_new (PangoVariant variant);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttribute *pango_attr_stretch_new (PangoStretch stretch);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttribute *pango_attr_font_desc_new (const PangoFontDescription *desc);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttribute *pango_attr_underline_new (PangoUnderline underline);
|
|
PANGO_AVAILABLE_IN_1_8
|
|
PangoAttribute *pango_attr_underline_color_new (guint16 red,
|
|
guint16 green,
|
|
guint16 blue);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttribute *pango_attr_strikethrough_new (gboolean strikethrough);
|
|
PANGO_AVAILABLE_IN_1_8
|
|
PangoAttribute *pango_attr_strikethrough_color_new (guint16 red,
|
|
guint16 green,
|
|
guint16 blue);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttribute *pango_attr_rise_new (int rise);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttribute *pango_attr_scale_new (double scale_factor);
|
|
PANGO_AVAILABLE_IN_1_4
|
|
PangoAttribute *pango_attr_fallback_new (gboolean enable_fallback);
|
|
PANGO_AVAILABLE_IN_1_6
|
|
PangoAttribute *pango_attr_letter_spacing_new (int letter_spacing);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttribute *pango_attr_shape_new (const PangoRectangle *ink_rect,
|
|
const PangoRectangle *logical_rect);
|
|
PANGO_AVAILABLE_IN_1_8
|
|
PangoAttribute *pango_attr_shape_new_with_data (const PangoRectangle *ink_rect,
|
|
const PangoRectangle *logical_rect,
|
|
gpointer data,
|
|
PangoAttrDataCopyFunc copy_func,
|
|
GDestroyNotify destroy_func);
|
|
|
|
PANGO_AVAILABLE_IN_1_16
|
|
PangoAttribute *pango_attr_gravity_new (PangoGravity gravity);
|
|
PANGO_AVAILABLE_IN_1_16
|
|
PangoAttribute *pango_attr_gravity_hint_new (PangoGravityHint hint);
|
|
PANGO_AVAILABLE_IN_1_38
|
|
PangoAttribute *pango_attr_font_features_new (const gchar *features);
|
|
PANGO_AVAILABLE_IN_1_38
|
|
PangoAttribute *pango_attr_foreground_alpha_new (guint16 alpha);
|
|
PANGO_AVAILABLE_IN_1_38
|
|
PangoAttribute *pango_attr_background_alpha_new (guint16 alpha);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
GType pango_attr_list_get_type (void) G_GNUC_CONST;
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttrList * pango_attr_list_new (void);
|
|
PANGO_AVAILABLE_IN_1_10
|
|
PangoAttrList * pango_attr_list_ref (PangoAttrList *list);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_attr_list_unref (PangoAttrList *list);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttrList * pango_attr_list_copy (PangoAttrList *list);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_attr_list_insert (PangoAttrList *list,
|
|
PangoAttribute *attr);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_attr_list_insert_before (PangoAttrList *list,
|
|
PangoAttribute *attr);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_attr_list_change (PangoAttrList *list,
|
|
PangoAttribute *attr);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_attr_list_splice (PangoAttrList *list,
|
|
PangoAttrList *other,
|
|
gint pos,
|
|
gint len);
|
|
|
|
PANGO_AVAILABLE_IN_1_2
|
|
PangoAttrList *pango_attr_list_filter (PangoAttrList *list,
|
|
PangoAttrFilterFunc func,
|
|
gpointer data);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttrIterator *pango_attr_list_get_iterator (PangoAttrList *list);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_attr_iterator_range (PangoAttrIterator *iterator,
|
|
gint *start,
|
|
gint *end);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
gboolean pango_attr_iterator_next (PangoAttrIterator *iterator);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttrIterator *pango_attr_iterator_copy (PangoAttrIterator *iterator);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_attr_iterator_destroy (PangoAttrIterator *iterator);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoAttribute * pango_attr_iterator_get (PangoAttrIterator *iterator,
|
|
PangoAttrType type);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_attr_iterator_get_font (PangoAttrIterator *iterator,
|
|
PangoFontDescription *desc,
|
|
PangoLanguage **language,
|
|
GSList **extra_attrs);
|
|
PANGO_AVAILABLE_IN_1_2
|
|
GSList * pango_attr_iterator_get_attrs (PangoAttrIterator *iterator);
|
|
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
gboolean pango_parse_markup (const char *markup_text,
|
|
int length,
|
|
gunichar accel_marker,
|
|
PangoAttrList **attr_list,
|
|
char **text,
|
|
gunichar *accel_char,
|
|
GError **error);
|
|
|
|
PANGO_AVAILABLE_IN_1_32
|
|
GMarkupParseContext * pango_markup_parser_new (gunichar accel_marker);
|
|
PANGO_AVAILABLE_IN_1_32
|
|
gboolean pango_markup_parser_finish (GMarkupParseContext *context,
|
|
PangoAttrList **attr_list,
|
|
char **text,
|
|
gunichar *accel_char,
|
|
GError **error);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __PANGO_ATTRIBUTES_H__ */
|