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|
/* Pango
* pango-layout.h: High-level layout driver
*
* Copyright (C) 2000 Red Hat Software
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __PANGO_LAYOUT_H__
#define __PANGO_LAYOUT_H__
#include <pango/pango-attributes.h>
#include <pango/pango-context.h>
#include <pango/pango-glyph-item.h>
#include <pango/pango-tabs.h>
G_BEGIN_DECLS
typedef struct _PangoLayout PangoLayout;
typedef struct _PangoLayoutClass PangoLayoutClass;
typedef struct _PangoLayoutLine PangoLayoutLine;
/**
* PangoLayoutRun:
*
* A `PangoLayoutRun` represents a single run within a `PangoLayoutLine`.
*
* It is simply an alternate name for [struct@Pango.GlyphItem].
* See the [struct@Pango.GlyphItem] docs for details on the fields.
*/
typedef PangoGlyphItem PangoLayoutRun;
/**
* PangoAlignment:
* @PANGO_ALIGN_LEFT: Put all available space on the right
* @PANGO_ALIGN_CENTER: Center the line within the available space
* @PANGO_ALIGN_RIGHT: Put all available space on the left
*
* `PangoAlignment` describes how to align the lines of a `PangoLayout`
* within the available space.
*
* If the `PangoLayout` is set to justify using [method@Pango.Layout.set_justify],
* this only has effect for partial lines.
*
* See [method@Pango.Layout.set_auto_dir] for how text direction affects
* the interpretation of `PangoAlignment values.
*/
typedef enum {
PANGO_ALIGN_LEFT,
PANGO_ALIGN_CENTER,
PANGO_ALIGN_RIGHT
} PangoAlignment;
/**
* PangoWrapMode:
* @PANGO_WRAP_WORD: wrap lines at word boundaries.
* @PANGO_WRAP_CHAR: wrap lines at character boundaries.
* @PANGO_WRAP_WORD_CHAR: wrap lines at word boundaries, but fall back to
* character boundaries if there is not enough space for a full word.
*
* `PangoWrapMode` describes how to wrap the lines of a `PangoLayout`
* to the desired width.
*
* For @PANGO_WRAP_WORD, Pango uses break opportunities that are determined
* by the Unicode line breaking algorithm. For @PANGO_WRAP_CHAR, Pango allows
* breaking at grapheme boundaries that are determined by the Unicode text
* segmentation algorithm.
*/
typedef enum {
PANGO_WRAP_WORD,
PANGO_WRAP_CHAR,
PANGO_WRAP_WORD_CHAR
} PangoWrapMode;
/**
* PangoEllipsizeMode:
* @PANGO_ELLIPSIZE_NONE: No ellipsization
* @PANGO_ELLIPSIZE_START: Omit characters at the start of the text
* @PANGO_ELLIPSIZE_MIDDLE: Omit characters in the middle of the text
* @PANGO_ELLIPSIZE_END: Omit characters at the end of the text
*
* `PangoEllipsizeMode` describes what sort of ellipsization
* should be applied to text.
*
* In the ellipsization process characters are removed from the
* text in order to make it fit to a given width and replaced
* with an ellipsis.
*/
typedef enum {
PANGO_ELLIPSIZE_NONE,
PANGO_ELLIPSIZE_START,
PANGO_ELLIPSIZE_MIDDLE,
PANGO_ELLIPSIZE_END
} PangoEllipsizeMode;
/**
* PangoLayoutLine:
* @layout: (nullable): the layout this line belongs to, might be %NULL
* @start_index: start of line as byte index into layout->text
* @length: length of line in bytes
* @runs: (nullable) (element-type Pango.LayoutRun): list of runs in the
* line, from left to right
* @is_paragraph_start: #TRUE if this is the first line of the paragraph
* @resolved_dir: #Resolved PangoDirection of line
*
* A `PangoLayoutLine` represents one of the lines resulting from laying
* out a paragraph via `PangoLayout`.
*
* `PangoLayoutLine` structures are obtained by calling
* [method@Pango.Layout.get_line] and are only valid until the text,
* attributes, or settings of the parent `PangoLayout` are modified.
*/
struct _PangoLayoutLine
{
PangoLayout *layout;
gint start_index; /* start of line as byte index into layout->text */
gint length; /* length of line in bytes */
GSList *runs;
guint is_paragraph_start : 1; /* TRUE if this is the first line of the paragraph */
guint resolved_dir : 3; /* Resolved PangoDirection of line */
};
#define PANGO_TYPE_LAYOUT (pango_layout_get_type ())
#define PANGO_LAYOUT(object) (G_TYPE_CHECK_INSTANCE_CAST ((object), PANGO_TYPE_LAYOUT, PangoLayout))
#define PANGO_LAYOUT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), PANGO_TYPE_LAYOUT, PangoLayoutClass))
#define PANGO_IS_LAYOUT(object) (G_TYPE_CHECK_INSTANCE_TYPE ((object), PANGO_TYPE_LAYOUT))
#define PANGO_IS_LAYOUT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), PANGO_TYPE_LAYOUT))
#define PANGO_LAYOUT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), PANGO_TYPE_LAYOUT, PangoLayoutClass))
/* The PangoLayout and PangoLayoutClass structs are private; if you
* need to create a subclass of these, file a bug.
*/
PANGO_AVAILABLE_IN_ALL
GType pango_layout_get_type (void) G_GNUC_CONST;
PANGO_AVAILABLE_IN_ALL
PangoLayout *pango_layout_new (PangoContext *context);
PANGO_AVAILABLE_IN_ALL
PangoLayout *pango_layout_copy (PangoLayout *src);
PANGO_AVAILABLE_IN_ALL
PangoContext *pango_layout_get_context (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_attributes (PangoLayout *layout,
PangoAttrList *attrs);
PANGO_AVAILABLE_IN_ALL
PangoAttrList *pango_layout_get_attributes (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_text (PangoLayout *layout,
const char *text,
int length);
PANGO_AVAILABLE_IN_ALL
const char *pango_layout_get_text (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_30
gint pango_layout_get_character_count (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_markup (PangoLayout *layout,
const char *markup,
int length);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_markup_with_accel (PangoLayout *layout,
const char *markup,
int length,
gunichar accel_marker,
gunichar *accel_char);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_font_description (PangoLayout *layout,
const PangoFontDescription *desc);
PANGO_AVAILABLE_IN_1_8
const PangoFontDescription *pango_layout_get_font_description (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_width (PangoLayout *layout,
int width);
PANGO_AVAILABLE_IN_ALL
int pango_layout_get_width (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_20
void pango_layout_set_height (PangoLayout *layout,
int height);
PANGO_AVAILABLE_IN_1_20
int pango_layout_get_height (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_wrap (PangoLayout *layout,
PangoWrapMode wrap);
PANGO_AVAILABLE_IN_ALL
PangoWrapMode pango_layout_get_wrap (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_16
gboolean pango_layout_is_wrapped (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_indent (PangoLayout *layout,
int indent);
PANGO_AVAILABLE_IN_ALL
int pango_layout_get_indent (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_spacing (PangoLayout *layout,
int spacing);
PANGO_AVAILABLE_IN_ALL
int pango_layout_get_spacing (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_44
void pango_layout_set_line_spacing (PangoLayout *layout,
float factor);
PANGO_AVAILABLE_IN_1_44
float pango_layout_get_line_spacing (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_justify (PangoLayout *layout,
gboolean justify);
PANGO_AVAILABLE_IN_ALL
gboolean pango_layout_get_justify (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_50
void pango_layout_set_justify_last_line (PangoLayout *layout,
gboolean justify);
PANGO_AVAILABLE_IN_1_50
gboolean pango_layout_get_justify_last_line (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_4
void pango_layout_set_auto_dir (PangoLayout *layout,
gboolean auto_dir);
PANGO_AVAILABLE_IN_1_4
gboolean pango_layout_get_auto_dir (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_alignment (PangoLayout *layout,
PangoAlignment alignment);
PANGO_AVAILABLE_IN_ALL
PangoAlignment pango_layout_get_alignment (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_tabs (PangoLayout *layout,
PangoTabArray *tabs);
PANGO_AVAILABLE_IN_ALL
PangoTabArray* pango_layout_get_tabs (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_set_single_paragraph_mode (PangoLayout *layout,
gboolean setting);
PANGO_AVAILABLE_IN_ALL
gboolean pango_layout_get_single_paragraph_mode (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_6
void pango_layout_set_ellipsize (PangoLayout *layout,
PangoEllipsizeMode ellipsize);
PANGO_AVAILABLE_IN_1_6
PangoEllipsizeMode pango_layout_get_ellipsize (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_16
gboolean pango_layout_is_ellipsized (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_16
int pango_layout_get_unknown_glyphs_count (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_46
PangoDirection pango_layout_get_direction (PangoLayout *layout,
int index);
PANGO_AVAILABLE_IN_ALL
void pango_layout_context_changed (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_32
guint pango_layout_get_serial (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
void pango_layout_get_log_attrs (PangoLayout *layout,
PangoLogAttr **attrs,
gint *n_attrs);
PANGO_AVAILABLE_IN_1_30
const PangoLogAttr *pango_layout_get_log_attrs_readonly (PangoLayout *layout,
gint *n_attrs);
PANGO_AVAILABLE_IN_ALL
void pango_layout_index_to_pos (PangoLayout *layout,
int index_,
PangoRectangle *pos);
PANGO_AVAILABLE_IN_ALL
void pango_layout_index_to_line_x (PangoLayout *layout,
int index_,
gboolean trailing,
int *line,
int *x_pos);
PANGO_AVAILABLE_IN_ALL
void pango_layout_get_cursor_pos (PangoLayout *layout,
int index_,
PangoRectangle *strong_pos,
PangoRectangle *weak_pos);
PANGO_AVAILABLE_IN_1_50
void pango_layout_get_caret_pos (PangoLayout *layout,
int index_,
PangoRectangle *strong_pos,
PangoRectangle *weak_pos);
PANGO_AVAILABLE_IN_ALL
void pango_layout_move_cursor_visually (PangoLayout *layout,
gboolean strong,
int old_index,
int old_trailing,
int direction,
int *new_index,
int *new_trailing);
PANGO_AVAILABLE_IN_ALL
gboolean pango_layout_xy_to_index (PangoLayout *layout,
int x,
int y,
int *index_,
int *trailing);
PANGO_AVAILABLE_IN_ALL
void pango_layout_get_extents (PangoLayout *layout,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect);
PANGO_AVAILABLE_IN_ALL
void pango_layout_get_pixel_extents (PangoLayout *layout,
PangoRectangle *ink_rect,
PangoRectangle *logical_rect);
PANGO_AVAILABLE_IN_ALL
void pango_layout_get_size (PangoLayout *layout,
int *width,
int *height);
PANGO_AVAILABLE_IN_ALL
void pango_layout_get_pixel_size (PangoLayout *layout,
int *width,
int *height);
PANGO_AVAILABLE_IN_1_22
int pango_layout_get_baseline (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
int pango_layout_get_line_count (PangoLayout *layout);
PANGO_AVAILABLE_IN_ALL
PangoLayoutLine *pango_layout_get_line (PangoLayout *layout,
int line);
PANGO_AVAILABLE_IN_1_16
PangoLayoutLine *pango_layout_get_line_readonly (PangoLayout *layout,
int line);
PANGO_AVAILABLE_IN_ALL
GSList * pango_layout_get_lines (PangoLayout *layout);
PANGO_AVAILABLE_IN_1_16
GSList * pango_layout_get_lines_readonly (PangoLayout *layout);
/**
* PangoLayoutSerializeFlags:
* @PANGO_LAYOUT_SERIALIZE_DEFAULT: Default behavior
* @PANGO_LAYOUT_SERIALIZE_CONTEXT: Include context information
*
* Flags that influence the behavior of [method@Pango.Layout.serialize].
*
* New members may be added to this enumeration over time.
*/
typedef enum {
PANGO_LAYOUT_SERIALIZE_DEFAULT = 0,
PANGO_LAYOUT_SERIALIZE_CONTEXT = 1 << 0,
} PangoLayoutSerializeFlags;
PANGO_AVAILABLE_IN_1_50
GBytes * pango_layout_serialize (PangoLayout *layout,
PangoLayoutSerializeFlags flags);
PANGO_AVAILABLE_IN_1_50
gboolean pango_layout_write_to_file (PangoLayout *layout,
PangoLayoutSerializeFlags flags,
const char *filename,
GError **error);
#define PANGO_LAYOUT_DESERIALIZE_ERROR (pango_layout_deserialize_error_quark ())
/**
* PangoLayoutDeserializeError:
* @PANGO_LAYOUT_SERIALIZE_INVALID: Unspecified error
* @PANGO_LAYOUT_SERIALIZE_INVALID_SYNTAX: The serialized data had
* the wrong structure (e.g. a member was expected to be a JSon object,
* but was an array)
* @PANGO_LAYOUT_SERIALIZE_INVALID_VALUE: A JSon value could not be
* interpreted
* @PANGO_LAYOUT_SERIALIZE_MISSING_VALUE: A required JSon member was
* not found
*
* Errors that can be returned by [func@Pango.Layout.deserialize].
*/
typedef enum {
PANGO_LAYOUT_DESERIALIZE_INVALID,
PANGO_LAYOUT_DESERIALIZE_INVALID_SYNTAX,
PANGO_LAYOUT_DESERIALIZE_INVALID_VALUE,
PANGO_LAYOUT_DESERIALIZE_MISSING_VALUE,
} PangoLayoutDeserializeError;
PANGO_AVAILABLE_IN_1_50
GQuark pango_layout_deserialize_error_quark (void);
/**
* PangoLayoutDeserializeFlags:
* @PANGO_LAYOUT_DESERIALIZE_DEFAULT: Default behavior
* @PANGO_LAYOUT_DESERIALIZE_CONTEXT: Apply context information
* from the serialization to the `PangoContext`
*
* Flags that influence the behavior of [method@Pango.Layout.deserialize].
*
* New members may be added to this enumeration over time.
*/
typedef enum {
PANGO_LAYOUT_DESERIALIZE_DEFAULT = 0,
PANGO_LAYOUT_DESERIALIZE_CONTEXT = 1 << 0,
} PangoLayoutDeserializeFlags;
PANGO_AVAILABLE_IN_1_50
PangoLayout * pango_layout_deserialize (PangoContext *context,
GBytes *bytes,
PangoLayoutDeserializeFlags flags,
GError **error);
#define PANGO_TYPE_LAYOUT_LINE (pango_layout_line_get_type ())
PANGO_AVAILABLE_IN_ALL
GType pango_layout_line_get_type (void) G_GNUC_CONST;
PANGO_AVAILABLE_IN_1_10
PangoLayoutLine *pango_layout_line_ref (PangoLayoutLine *line);
PANGO_AVAILABLE_IN_ALL
void pango_layout_line_unref (PangoLayoutLine *line);
PANGO_AVAILABLE_IN_1_50
int pango_layout_line_get_start_index (PangoLayoutLine *line);
PANGO_AVAILABLE_IN_1_50
int pango_layout_line_get_length (PangoLayoutLine *line);
PANGO_AVAILABLE_IN_1_50
gboolean pango_layout_line_is_paragraph_start (PangoLayoutLine *line);
PANGO_AVAILABLE_IN_1_50
PangoDirection pango_layout_line_get_resolved_direction (PangoLayoutLine *line);
PANGO_AVAILABLE_IN_ALL
gboolean pango_layout_line_x_to_index (PangoLayoutLine *line,
int x_pos,
int *index_,
int *trailing);
PANGO_AVAILABLE_IN_ALL
void pango_layout_line_index_to_x (PangoLayoutLine *line,
int index_,
gboolean trailing,
int *x_pos);
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;
#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__ */
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