564 lines
21 KiB
C
564 lines
21 KiB
C
/* Pango
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* pango-layout.h: High-level layout driver
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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_LAYOUT_H__
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#define __PANGO_LAYOUT_H__
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#include <pango/pango-attributes.h>
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#include <pango/pango-context.h>
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#include <pango/pango-glyph-item.h>
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#include <pango/pango-tabs.h>
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G_BEGIN_DECLS
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typedef struct _PangoLayout PangoLayout;
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typedef struct _PangoLayoutClass PangoLayoutClass;
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typedef struct _PangoLayoutLine PangoLayoutLine;
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/**
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* PangoLayoutRun:
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*
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* A `PangoLayoutRun` represents a single run within a `PangoLayoutLine`.
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*
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* It is simply an alternate name for [struct@Pango.GlyphItem].
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* See the [struct@Pango.GlyphItem] docs for details on the fields.
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*/
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typedef PangoGlyphItem PangoLayoutRun;
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/**
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* PangoAlignment:
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* @PANGO_ALIGN_LEFT: Put all available space on the right
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* @PANGO_ALIGN_CENTER: Center the line within the available space
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* @PANGO_ALIGN_RIGHT: Put all available space on the left
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*
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* `PangoAlignment` describes how to align the lines of a `PangoLayout`
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* within the available space.
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*
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* If the `PangoLayout` is set to justify using [method@Pango.Layout.set_justify],
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* this only affects partial lines.
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*
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* See [method@Pango.Layout.set_auto_dir] for how text direction affects
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* the interpretation of `PangoAlignment` values.
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*/
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typedef enum {
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PANGO_ALIGN_LEFT,
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PANGO_ALIGN_CENTER,
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PANGO_ALIGN_RIGHT
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} PangoAlignment;
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/**
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* PangoWrapMode:
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* @PANGO_WRAP_WORD: wrap lines at word boundaries.
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* @PANGO_WRAP_CHAR: wrap lines at character boundaries.
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* @PANGO_WRAP_WORD_CHAR: wrap lines at word boundaries, but fall back to
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* character boundaries if there is not enough space for a full word.
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*
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* `PangoWrapMode` describes how to wrap the lines of a `PangoLayout`
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* to the desired width.
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*
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* For @PANGO_WRAP_WORD, Pango uses break opportunities that are determined
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* by the Unicode line breaking algorithm. For @PANGO_WRAP_CHAR, Pango allows
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* breaking at grapheme boundaries that are determined by the Unicode text
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* segmentation algorithm.
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*/
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/**
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* PANGO_WRAP_NONE:
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*
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* do not wrap.
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*
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* Since: 1.56
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*/
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typedef enum {
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PANGO_WRAP_WORD,
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PANGO_WRAP_CHAR,
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PANGO_WRAP_WORD_CHAR,
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PANGO_WRAP_NONE PANGO_AVAILABLE_ENUMERATOR_IN_1_56
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} PangoWrapMode;
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/**
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* PangoEllipsizeMode:
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* @PANGO_ELLIPSIZE_NONE: No ellipsization
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* @PANGO_ELLIPSIZE_START: Omit characters at the start of the text
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* @PANGO_ELLIPSIZE_MIDDLE: Omit characters in the middle of the text
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* @PANGO_ELLIPSIZE_END: Omit characters at the end of the text
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*
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* `PangoEllipsizeMode` describes what sort of ellipsization
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* should be applied to text.
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*
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* In the ellipsization process characters are removed from the
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* text in order to make it fit to a given width and replaced
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* with an ellipsis.
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*/
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typedef enum {
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PANGO_ELLIPSIZE_NONE,
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PANGO_ELLIPSIZE_START,
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PANGO_ELLIPSIZE_MIDDLE,
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PANGO_ELLIPSIZE_END
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} PangoEllipsizeMode;
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/**
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* PangoLayoutLine:
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* @layout: (nullable): the layout this line belongs to, might be %NULL
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* @start_index: start of line as byte index into layout->text
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* @length: length of line in bytes
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* @runs: (nullable) (element-type Pango.LayoutRun): list of runs in the
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* line, from left to right
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* @is_paragraph_start: #TRUE if this is the first line of the paragraph
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* @resolved_dir: #Resolved PangoDirection of line
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*
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* A `PangoLayoutLine` represents one of the lines resulting from laying
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* out a paragraph via `PangoLayout`.
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*
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* `PangoLayoutLine` structures are obtained by calling
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* [method@Pango.Layout.get_line] and are only valid until the text,
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* attributes, or settings of the parent `PangoLayout` are modified.
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*/
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struct _PangoLayoutLine
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{
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PangoLayout *layout;
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gint start_index; /* start of line as byte index into layout->text */
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gint length; /* length of line in bytes */
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GSList *runs;
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guint is_paragraph_start : 1; /* TRUE if this is the first line of the paragraph */
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guint resolved_dir : 3; /* Resolved PangoDirection of line */
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};
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#define PANGO_TYPE_LAYOUT (pango_layout_get_type ())
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#define PANGO_LAYOUT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_LAYOUT, PangoLayout))
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#define PANGO_LAYOUT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_LAYOUT, PangoLayoutClass))
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#define PANGO_IS_LAYOUT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_LAYOUT))
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#define PANGO_IS_LAYOUT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_LAYOUT))
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#define PANGO_LAYOUT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_LAYOUT, PangoLayoutClass))
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/* The PangoLayout and PangoLayoutClass structs are private; if you
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* need to create a subclass of these, file a bug.
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*/
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PANGO_AVAILABLE_IN_ALL
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GType pango_layout_get_type (void) G_GNUC_CONST;
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PANGO_AVAILABLE_IN_ALL
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PangoLayout *pango_layout_new (PangoContext *context);
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PANGO_AVAILABLE_IN_ALL
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PangoLayout *pango_layout_copy (PangoLayout *src);
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PANGO_AVAILABLE_IN_ALL
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PangoContext *pango_layout_get_context (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_attributes (PangoLayout *layout,
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PangoAttrList *attrs);
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PANGO_AVAILABLE_IN_ALL
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PangoAttrList *pango_layout_get_attributes (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_text (PangoLayout *layout,
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const char *text,
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int length);
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PANGO_AVAILABLE_IN_ALL
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const char *pango_layout_get_text (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_30
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gint pango_layout_get_character_count (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_markup (PangoLayout *layout,
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const char *markup,
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int length);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_markup_with_accel (PangoLayout *layout,
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const char *markup,
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int length,
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gunichar accel_marker,
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gunichar *accel_char);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_font_description (PangoLayout *layout,
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const PangoFontDescription *desc);
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PANGO_AVAILABLE_IN_1_8
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const PangoFontDescription *pango_layout_get_font_description (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_width (PangoLayout *layout,
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int width);
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PANGO_AVAILABLE_IN_ALL
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int pango_layout_get_width (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_20
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void pango_layout_set_height (PangoLayout *layout,
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int height);
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PANGO_AVAILABLE_IN_1_20
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int pango_layout_get_height (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_wrap (PangoLayout *layout,
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PangoWrapMode wrap);
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PANGO_AVAILABLE_IN_ALL
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PangoWrapMode pango_layout_get_wrap (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_16
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gboolean pango_layout_is_wrapped (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_indent (PangoLayout *layout,
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int indent);
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PANGO_AVAILABLE_IN_ALL
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int pango_layout_get_indent (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_spacing (PangoLayout *layout,
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int spacing);
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PANGO_AVAILABLE_IN_ALL
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int pango_layout_get_spacing (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_44
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void pango_layout_set_line_spacing (PangoLayout *layout,
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float factor);
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PANGO_AVAILABLE_IN_1_44
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float pango_layout_get_line_spacing (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_justify (PangoLayout *layout,
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gboolean justify);
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PANGO_AVAILABLE_IN_ALL
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gboolean pango_layout_get_justify (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_50
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void pango_layout_set_justify_last_line (PangoLayout *layout,
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gboolean justify);
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PANGO_AVAILABLE_IN_1_50
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gboolean pango_layout_get_justify_last_line (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_4
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void pango_layout_set_auto_dir (PangoLayout *layout,
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gboolean auto_dir);
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PANGO_AVAILABLE_IN_1_4
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gboolean pango_layout_get_auto_dir (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_alignment (PangoLayout *layout,
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PangoAlignment alignment);
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PANGO_AVAILABLE_IN_ALL
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PangoAlignment pango_layout_get_alignment (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_tabs (PangoLayout *layout,
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PangoTabArray *tabs);
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PANGO_AVAILABLE_IN_ALL
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PangoTabArray* pango_layout_get_tabs (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_set_single_paragraph_mode (PangoLayout *layout,
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gboolean setting);
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PANGO_AVAILABLE_IN_ALL
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gboolean pango_layout_get_single_paragraph_mode (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_6
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void pango_layout_set_ellipsize (PangoLayout *layout,
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PangoEllipsizeMode ellipsize);
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PANGO_AVAILABLE_IN_1_6
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PangoEllipsizeMode pango_layout_get_ellipsize (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_16
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gboolean pango_layout_is_ellipsized (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_16
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int pango_layout_get_unknown_glyphs_count (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_46
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PangoDirection pango_layout_get_direction (PangoLayout *layout,
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int index);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_context_changed (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_32
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guint pango_layout_get_serial (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_get_log_attrs (PangoLayout *layout,
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PangoLogAttr **attrs,
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gint *n_attrs);
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PANGO_AVAILABLE_IN_1_30
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const PangoLogAttr *pango_layout_get_log_attrs_readonly (PangoLayout *layout,
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gint *n_attrs);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_index_to_pos (PangoLayout *layout,
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int index_,
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PangoRectangle *pos);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_index_to_line_x (PangoLayout *layout,
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int index_,
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gboolean trailing,
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int *line,
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int *x_pos);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_get_cursor_pos (PangoLayout *layout,
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int index_,
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PangoRectangle *strong_pos,
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PangoRectangle *weak_pos);
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PANGO_AVAILABLE_IN_1_50
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void pango_layout_get_caret_pos (PangoLayout *layout,
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int index_,
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PangoRectangle *strong_pos,
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PangoRectangle *weak_pos);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_move_cursor_visually (PangoLayout *layout,
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gboolean strong,
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int old_index,
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int old_trailing,
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int direction,
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int *new_index,
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int *new_trailing);
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PANGO_AVAILABLE_IN_ALL
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gboolean pango_layout_xy_to_index (PangoLayout *layout,
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int x,
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int y,
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int *index_,
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int *trailing);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_get_extents (PangoLayout *layout,
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PangoRectangle *ink_rect,
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PangoRectangle *logical_rect);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_get_pixel_extents (PangoLayout *layout,
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PangoRectangle *ink_rect,
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PangoRectangle *logical_rect);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_get_size (PangoLayout *layout,
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int *width,
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int *height);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_get_pixel_size (PangoLayout *layout,
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int *width,
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int *height);
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PANGO_AVAILABLE_IN_1_22
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int pango_layout_get_baseline (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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int pango_layout_get_line_count (PangoLayout *layout);
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PANGO_AVAILABLE_IN_ALL
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PangoLayoutLine *pango_layout_get_line (PangoLayout *layout,
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int line);
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PANGO_AVAILABLE_IN_1_16
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PangoLayoutLine *pango_layout_get_line_readonly (PangoLayout *layout,
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int line);
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PANGO_AVAILABLE_IN_ALL
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GSList * pango_layout_get_lines (PangoLayout *layout);
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PANGO_AVAILABLE_IN_1_16
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GSList * pango_layout_get_lines_readonly (PangoLayout *layout);
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/**
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* PangoLayoutSerializeFlags:
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* @PANGO_LAYOUT_SERIALIZE_DEFAULT: Default behavior
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* @PANGO_LAYOUT_SERIALIZE_CONTEXT: Include context information
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* @PANGO_LAYOUT_SERIALIZE_OUTPUT: Include information about the formatted output
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*
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* Flags that influence the behavior of [method@Pango.Layout.serialize].
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*
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* New members may be added to this enumeration over time.
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*
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* Since: 1.50
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*/
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typedef enum {
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PANGO_LAYOUT_SERIALIZE_DEFAULT = 0,
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PANGO_LAYOUT_SERIALIZE_CONTEXT = 1 << 0,
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PANGO_LAYOUT_SERIALIZE_OUTPUT = 1 << 1,
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} PangoLayoutSerializeFlags;
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PANGO_AVAILABLE_IN_1_50
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GBytes * pango_layout_serialize (PangoLayout *layout,
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PangoLayoutSerializeFlags flags);
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PANGO_AVAILABLE_IN_1_50
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gboolean pango_layout_write_to_file (PangoLayout *layout,
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PangoLayoutSerializeFlags flags,
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const char *filename,
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GError **error);
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#define PANGO_LAYOUT_DESERIALIZE_ERROR (pango_layout_deserialize_error_quark ())
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/**
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* PangoLayoutDeserializeError:
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* @PANGO_LAYOUT_DESERIALIZE_INVALID: Unspecified error
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* @PANGO_LAYOUT_DESERIALIZE_INVALID_VALUE: A JSon value could not be
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* interpreted
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* @PANGO_LAYOUT_DESERIALIZE_MISSING_VALUE: A required JSon member was
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* not found
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*
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* Errors that can be returned by [func@Pango.Layout.deserialize].
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*
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* Since: 1.50
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*/
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typedef enum {
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PANGO_LAYOUT_DESERIALIZE_INVALID,
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PANGO_LAYOUT_DESERIALIZE_INVALID_VALUE,
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PANGO_LAYOUT_DESERIALIZE_MISSING_VALUE,
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} PangoLayoutDeserializeError;
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PANGO_AVAILABLE_IN_1_50
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GQuark pango_layout_deserialize_error_quark (void);
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/**
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* PangoLayoutDeserializeFlags:
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* @PANGO_LAYOUT_DESERIALIZE_DEFAULT: Default behavior
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* @PANGO_LAYOUT_DESERIALIZE_CONTEXT: Apply context information
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* from the serialization to the `PangoContext`
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*
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* Flags that influence the behavior of [func@Pango.Layout.deserialize].
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*
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* New members may be added to this enumeration over time.
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*
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* Since: 1.50
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*/
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typedef enum {
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PANGO_LAYOUT_DESERIALIZE_DEFAULT = 0,
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PANGO_LAYOUT_DESERIALIZE_CONTEXT = 1 << 0,
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} PangoLayoutDeserializeFlags;
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PANGO_AVAILABLE_IN_1_50
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PangoLayout * pango_layout_deserialize (PangoContext *context,
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GBytes *bytes,
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PangoLayoutDeserializeFlags flags,
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GError **error);
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#define PANGO_TYPE_LAYOUT_LINE (pango_layout_line_get_type ())
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PANGO_AVAILABLE_IN_ALL
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GType pango_layout_line_get_type (void) G_GNUC_CONST;
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PANGO_AVAILABLE_IN_1_10
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PangoLayoutLine *pango_layout_line_ref (PangoLayoutLine *line);
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PANGO_AVAILABLE_IN_ALL
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void pango_layout_line_unref (PangoLayoutLine *line);
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PANGO_AVAILABLE_IN_1_50
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int pango_layout_line_get_start_index (PangoLayoutLine *line);
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PANGO_AVAILABLE_IN_1_50
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int pango_layout_line_get_length (PangoLayoutLine *line);
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PANGO_AVAILABLE_IN_1_50
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gboolean pango_layout_line_is_paragraph_start (PangoLayoutLine *line);
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PANGO_AVAILABLE_IN_1_50
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PangoDirection pango_layout_line_get_resolved_direction (PangoLayoutLine *line);
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PANGO_AVAILABLE_IN_ALL
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gboolean pango_layout_line_x_to_index (PangoLayoutLine *line,
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|
int x_pos,
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|
int *index_,
|
|
int *trailing);
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|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_line_index_to_x (PangoLayoutLine *line,
|
|
int index_,
|
|
gboolean trailing,
|
|
int *x_pos);
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|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_line_get_x_ranges (PangoLayoutLine *line,
|
|
int start_index,
|
|
int end_index,
|
|
int **ranges,
|
|
int *n_ranges);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_line_get_extents (PangoLayoutLine *line,
|
|
PangoRectangle *ink_rect,
|
|
PangoRectangle *logical_rect);
|
|
PANGO_AVAILABLE_IN_1_44
|
|
void pango_layout_line_get_height (PangoLayoutLine *line,
|
|
int *height);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_line_get_pixel_extents (PangoLayoutLine *layout_line,
|
|
PangoRectangle *ink_rect,
|
|
PangoRectangle *logical_rect);
|
|
|
|
typedef struct _PangoLayoutIter PangoLayoutIter;
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|
|
|
#define PANGO_TYPE_LAYOUT_ITER (pango_layout_iter_get_type ())
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
GType pango_layout_iter_get_type (void) G_GNUC_CONST;
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoLayoutIter *pango_layout_get_iter (PangoLayout *layout);
|
|
PANGO_AVAILABLE_IN_1_20
|
|
PangoLayoutIter *pango_layout_iter_copy (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_iter_free (PangoLayoutIter *iter);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
int pango_layout_iter_get_index (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoLayoutRun *pango_layout_iter_get_run (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_1_16
|
|
PangoLayoutRun *pango_layout_iter_get_run_readonly (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
PangoLayoutLine *pango_layout_iter_get_line (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_1_16
|
|
PangoLayoutLine *pango_layout_iter_get_line_readonly (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
gboolean pango_layout_iter_at_last_line (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_1_20
|
|
PangoLayout *pango_layout_iter_get_layout (PangoLayoutIter *iter);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
gboolean pango_layout_iter_next_char (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
gboolean pango_layout_iter_next_cluster (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
gboolean pango_layout_iter_next_run (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
gboolean pango_layout_iter_next_line (PangoLayoutIter *iter);
|
|
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_iter_get_char_extents (PangoLayoutIter *iter,
|
|
PangoRectangle *logical_rect);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_iter_get_cluster_extents (PangoLayoutIter *iter,
|
|
PangoRectangle *ink_rect,
|
|
PangoRectangle *logical_rect);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_iter_get_run_extents (PangoLayoutIter *iter,
|
|
PangoRectangle *ink_rect,
|
|
PangoRectangle *logical_rect);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_iter_get_line_extents (PangoLayoutIter *iter,
|
|
PangoRectangle *ink_rect,
|
|
PangoRectangle *logical_rect);
|
|
/* All the yranges meet, unlike the logical_rect's (i.e. the yranges
|
|
* assign between-line spacing to the nearest line)
|
|
*/
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_iter_get_line_yrange (PangoLayoutIter *iter,
|
|
int *y0_,
|
|
int *y1_);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
void pango_layout_iter_get_layout_extents (PangoLayoutIter *iter,
|
|
PangoRectangle *ink_rect,
|
|
PangoRectangle *logical_rect);
|
|
PANGO_AVAILABLE_IN_ALL
|
|
int pango_layout_iter_get_baseline (PangoLayoutIter *iter);
|
|
PANGO_AVAILABLE_IN_1_50
|
|
int pango_layout_iter_get_run_baseline (PangoLayoutIter *iter);
|
|
|
|
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC(PangoLayout, g_object_unref)
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC(PangoLayoutIter, pango_layout_iter_free)
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __PANGO_LAYOUT_H__ */
|
|
|