libgtkada2.24.4-dev 2.24.4dfsg-1 / usr / share / ada / adainclude / gtkada / pango-font.ads

This file is indexed.

/usr/share/ada/adainclude/gtkada/pango-font.ads is in libgtkada2.24.4-dev 2.24.4dfsg-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below. 

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
-----------------------------------------------------------------------
--              GtkAda - Ada95 binding for Gtk+/Gnome                --
--                                                                   --
--                Copyright (C) 2001-2013, AdaCore                   --
--                                                                   --
-- This library is free software; you can redistribute it and/or     --
-- modify it under the terms of the GNU 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 --
-- General Public License for more details.                          --
--                                                                   --
-- You should have received a copy of the GNU 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.                                       --
--                                                                   --
-----------------------------------------------------------------------

--  <description>
--
--  This package provides high-level, system-independent handling of fonts. It
--  supercedes the old Gdk.Font package, which should no longer be used.
--
--  Fonts are defined through several attributes, like their family, weight,
--  size, style, ...
--
--  The Pango_Font_Description objects created by this package can either be
--  used directly to draw text through Pango.Layout.Pango_Layout objects (and
--  the associated Gdk.Drawable.Draw_Layout procedure), or by converting them
--  to a Gdk_Font. The first method is the preferred one, and provides
--  high-level handling of multi-line texts or tabs, when you have to handle
--  this yourself in the second case.
--
--  </description>
--  <group>Pango, font handling</group>

with Glib; use Glib;
with Glib.Object;
with Glib.Generic_Properties; use Glib.Generic_Properties;
pragma Elaborate_All (Glib.Generic_Properties);
with Pango.Enums;
with System;

package Pango.Font is

   type Pango_Font_Description is new Glib.C_Proxy;

   function Get_Type return Glib.GType;
   --  Return the internal gtk+ type associated with font descriptions.

   function Copy (Desc : Pango_Font_Description) return Pango_Font_Description;
   --  Return a newly allocated font description.
   --  This Pango_Font_Description needs to be free'ed after use.

   function Equal
     (Desc1 : Pango_Font_Description;
      Desc2 : Pango_Font_Description) return Boolean;
   --  Return True if the two font descriptions are identical.
   --  Note that two font description may result in identical fonts being
   --  loaded, but still compare False.

   procedure Free (Desc : in out Pango_Font_Description);
   --  Deallocate the given font description.

   function From_String (Str : String) return Pango_Font_Description;
   --  Create a new font description from the given string representation
   --  of the given form: "[FAMILY-LIST] [STYLE-OPTIONS] [SIZE]". Any one
   --  of the options may be omitted.
   --    - FAMILY-LIST is a comma separated list (spaces are not allowed)
   --      of font families optionally terminated by a comma. If absent,
   --      the font family of the font that will be used is unspecified.
   --    - STYLE_OPTIONS is a whitespace separated list of words where each
   --      word describes either style, variant, weight, or stretch. Any
   --      unspecified style option is defaulted to "Normal", which
   --      respectively corresponds to Pango_Style_Normal, Pango_Weight_Normal,
   --      Pango_Variant_Normal, and Pango_Stretch_Normal.
   --    - SIZE is a decimal number describing the size of the font in points.
   --      If unspecified, a size of 0 will be used.

   function To_Font_Description
     (Family_Name : String := "";
      Style       : Pango.Enums.Style := Pango.Enums.Pango_Style_Normal;
      Variant     : Pango.Enums.Variant := Pango.Enums.Pango_Variant_Normal;
      Weight      : Pango.Enums.Weight := Pango.Enums.Pango_Weight_Normal;
      Stretch     : Pango.Enums.Stretch := Pango.Enums.Pango_Stretch_Normal;
      Size        : Gint := 0) return Pango_Font_Description;
   --  Create a new font decription from the given parameters.

   function To_String (Desc : Pango_Font_Description) return String;
   --  Create a string representation of a font description. The format
   --  of the string produced follows the syntax used by From_String.
   --  The family-list in the string description will have a terminating
   --  comma only if the last word of the list is a valid style option.

   function To_Filename (Desc : Pango_Font_Description) return String;
   --  Create a filename representation of a font description. The filename
   --  is identical to the result from calling To_String, but with underscores
   --  instead of characters that are untypical in filenames, and in lower
   --  case only.

   function Get_Family (Desc : Pango_Font_Description) return String;
   --  Return the Family_Name of the given Pango_Font_Description.

   procedure Set_Family (Desc : Pango_Font_Description; Name : String);
   --  Set the Family_Name of the given Pango_Font_Description.

   function Get_Style (Desc : Pango_Font_Description) return Pango.Enums.Style;
   --  Return the Style of the given Pango_Font_Description.

   procedure Set_Style
     (Desc : Pango_Font_Description; Style : Pango.Enums.Style);
   --  Set the Style of the given Pango_Font_Description.

   function Get_Variant
     (Desc : Pango_Font_Description) return Pango.Enums.Variant;
   --  Return the Variant of the given Pango_Font_Description.

   procedure Set_Variant
     (Desc : Pango_Font_Description; Variant : Pango.Enums.Variant);
   --  Set the Variant of the given Pango_Font_Description.

   function Get_Weight
     (Desc : Pango_Font_Description) return Pango.Enums.Weight;
   --  Return the Weight of the given Pango_Font_Description.

   procedure Set_Weight
     (Desc : Pango_Font_Description; Weight : Pango.Enums.Weight);
   --  Set the Weight of the given Pango_Font_Description.

   function Get_Stretch
     (Desc : Pango_Font_Description) return Pango.Enums.Stretch;
   --  Return the Stretch of the given Pango_Font_Description.

   procedure Set_Stretch
     (Desc : Pango_Font_Description; Stretch : Pango.Enums.Stretch);
   --  Set the Stretch of the given Pango_Font_Description.

   function Get_Size (Desc : Pango_Font_Description) return Gint;
   --  Return value: the size for the font description in pango units.
   --  (PANGO_SCALE pango units equals one point). Returns 0 if Desc hasn't
   --  been initialized.

   procedure Set_Size (Desc : Pango_Font_Description; Size : Gint);
   --  Set the size for the font description in pango units.  (PANGO_SCALE
   --  pango units equals one point)

   ---------------
   -- Languages --
   ---------------
   --  The following section provides types and subprograms to identify a
   --  specific script and language inside a font (Not all characters of a font
   --  are used for all languages)

   type Pango_Language is new Glib.C_Proxy;

   function Pango_Language_Get_Type return Glib.GType;
   --  Return the internal value used to identify a Pango_Language

   function From_String (Language : String) return Pango_Language;
   --  Take a RFC-3066 format language tag as a string and convert it to a
   --  Pango_Language pointer that can be efficiently copied (copy the pointer)
   --  and compared with other language tags (compare the pointer). Language is
   --  something like "fr" (french), "ar" (arabic), "en" (english), "ru"
   --  (russian), ...
   --
   --  This function first canonicalizes the string by converting it to
   --  lowercase, mapping '_' to '-', and stripping all characters other than
   --  letters and '-'.
   --
   --  The returned value need not be freed, it is stored internally by gtk+ in
   --  a hash-table.

   -------------
   -- Metrics --
   -------------
   --  The following subprograms can be used to retrieve the metrics associated
   --  with the font. Note that such metrics might depend on the specific
   --  script/language in use.

   type Pango_Font_Metrics is new Glib.C_Proxy;

   type Pango_Font_Record is new Glib.Object.GObject_Record with null record;
   type Pango_Font is access all Pango_Font_Record'Class;
   --  Created through Pango.Context.Load_Font

   function Get_Metrics
     (Font : access Pango_Font_Record'Class;
      Language : Pango_Language := null) return Pango_Font_Metrics;
   --  Gets overall metric information for a font. Since the metrics may be
   --  substantially different for different scripts, a language tag can be
   --  provided to indicate that the metrics should be retrieved that
   --  correspond to the script(s) used by that language.
   --
   --  The returned value must be Unref'ed by the caller.
   --
   --  Language determines which script to get the metrics for, or null to
   --  indicate the metrics for the entire font.

   procedure Ref (Metrics : Pango_Font_Metrics);
   procedure Unref (Metrics : Pango_Font_Metrics);
   --  Ref or unref Metrics When the reference counter reaches 0, the memory is
   --  deallocated.

   function Get_Ascent (Metrics : Pango_Font_Metrics) return Gint;
   --  Gets the ascent from a font metrics structure. The ascent is the
   --  distance from the baseline to the logical top of a line of text. (The
   --  logical top may be above or below the top of the actual drawn ink. It is
   --  necessary to lay out the text to figure where the ink will be).
   --
   --  The returned value is expressed in pango units, and must be divided by
   --  Pango_Scale to get the value in pixels.

   function Get_Descent (Metrics : Pango_Font_Metrics) return Gint;
   --  Gets the descent from a font metrics structure. The descent is the
   --  distance from the baseline to the logical bottom of a line of text. (The
   --  logical bottom may be above or below the bottom of the actual drawn
   --  ink. It is necessary to lay out the text to figure where the ink will
   --  be.)
   --
   --  The returned value is expressed in pango units, and must be divided by
   --  Pango_Scale to get the value in pixels.

   function Get_Approximate_Char_Width (Metrics : Pango_Font_Metrics)
      return Gint;
   --  Gets the approximate character width for a font metrics structure.  This
   --  is merely a representative value useful, for example, for determining
   --  the initial size for a window. Actual characters in text will be wider
   --  and narrower than this.
   --
   --  The returned value is expressed in pango units, and must be divided by
   --  Pango_Scale to get the value in pixels.

   function Get_Approximate_Digit_Width (Metrics : Pango_Font_Metrics)
      return Gint;
   --  Gets the approximate digit width for a font metrics structure.  This is
   --  merely a representative value useful, for example, for determining the
   --  initial size for a window. Actual digits in text can be wider and
   --  narrower than this, though this value is generally somewhat more
   --  accurate than the result of Get_Approximate_Char_Width.
   --
   --  The returned value is expressed in pango units, and must be divided by
   --  Pango_Scale to get the value in pixels.

   function Font_Metrics_Get_Type return Glib.GType;
   --  Return the internal value associated with a Pango_Font_Metrics

   ----------------
   -- Properties --
   ----------------
   --  See the package Glib.Properties for more information on how to
   --  use properties

   pragma Import (C, Get_Type, "pango_font_description_get_type");

   function To_Address
     (F : Pango_Font_Description; Add : System.Address) return System.Address;

   package Desc_Properties is new Generic_Internal_Boxed_Property
     (Pango_Font_Description, Get_Type, To_Address);

   type Property_Font_Description is new Desc_Properties.Property;

private
   pragma Import (C, Copy, "pango_font_description_copy");
   pragma Import (C, Get_Size, "pango_font_description_get_size");
   pragma Import (C, Set_Size, "pango_font_description_set_size");
   pragma Import (C, Pango_Language_Get_Type, "pango_language_get_type");
   pragma Import
     (C, Font_Metrics_Get_Type, "pango_font_metrics_get_type");
   pragma Import (C, Ref, "pango_font_metrics_ref");
   pragma Import (C, Unref, "pango_font_metrics_unref");
   pragma Import (C, Get_Ascent, "pango_font_metrics_get_ascent");
   pragma Import (C, Get_Descent, "pango_font_metrics_get_descent");
   pragma Import (C, Get_Approximate_Char_Width,
                  "pango_font_metrics_get_approximate_char_width");
   pragma Import (C, Get_Approximate_Digit_Width,
                  "pango_font_metrics_get_approximate_digit_width");

   pragma Import (C, Get_Style, "pango_font_description_get_style");
   pragma Import (C, Set_Style, "pango_font_description_set_style");
   pragma Import (C, Get_Variant, "pango_font_description_get_variant");
   pragma Import (C, Set_Variant, "pango_font_description_set_variant");
   pragma Import (C, Get_Weight, "pango_font_description_get_weight");
   pragma Import (C, Set_Weight, "pango_font_description_set_weight");
   pragma Import (C, Get_Stretch, "pango_font_description_get_stretch");
   pragma Import (C, Set_Stretch, "pango_font_description_set_stretch");
end Pango.Font;

--  Missing:
--  pango_language_matches

APT Browse - Built by Thomas Orozco.