/* GTK - The GIMP Toolkit * gtkfontchooser.c - Abstract interface for font file selectors GUIs * * Copyright (C) 2006, Emmanuele Bassi * Copyright (C) 2011 Alberto Ruiz * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library. If not, see . */ #include "config.h" #include "gtkfontchooser.h" #include "gtkfontchooserprivate.h" #include "gtktypebuiltins.h" #include "gtkprivate.h" /** * GtkFontChooser: * * `GtkFontChooser` is an interface that can be implemented by widgets * for choosing fonts. * * In GTK, the main objects that implement this interface are * [class@Gtk.FontChooserWidget], [class@Gtk.FontChooserDialog] and * [class@Gtk.FontButton]. */ enum { SIGNAL_FONT_ACTIVATED, LAST_SIGNAL }; static guint chooser_signals[LAST_SIGNAL]; typedef GtkFontChooserIface GtkFontChooserInterface; G_DEFINE_INTERFACE (GtkFontChooser, gtk_font_chooser, G_TYPE_OBJECT); static void gtk_font_chooser_default_init (GtkFontChooserInterface *iface) { /** * GtkFontChooser:font: (attributes org.gtk.Property.get=gtk_font_chooser_get_font org.gtk.Property.set=gtk_font_chooser_set_font) * * The font description as a string, e.g. "Sans Italic 12". */ g_object_interface_install_property (iface, g_param_spec_string ("font", NULL, NULL, GTK_FONT_CHOOSER_DEFAULT_FONT_NAME, GTK_PARAM_READWRITE)); /** * GtkFontChooser:font-desc: (attributes org.gtk.Property.get=gtk_font_chooser_get_font_desc org.gtk.Property.set=gtk_font_chooser_set_font_desc) * * The font description as a `PangoFontDescription`. */ g_object_interface_install_property (iface, g_param_spec_boxed ("font-desc", NULL, NULL, PANGO_TYPE_FONT_DESCRIPTION, GTK_PARAM_READWRITE)); /** * GtkFontChooser:preview-text: (attributes org.gtk.Property.get=gtk_font_chooser_get_preview_text org.gtk.Property.set=gtk_font_chooser_set_preview_text) * * The string with which to preview the font. */ g_object_interface_install_property (iface, g_param_spec_string ("preview-text", NULL, NULL, pango_language_get_sample_string (NULL), GTK_PARAM_READWRITE)); /** * GtkFontChooser:show-preview-entry: (attributes org.gtk.Property.get=gtk_font_chooser_get_show_preview_entry org.gtk.Property.set=gtk_font_chooser_set_show_preview_entry) * * Whether to show an entry to change the preview text. */ g_object_interface_install_property (iface, g_param_spec_boolean ("show-preview-entry", NULL, NULL, TRUE, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY)); /** * GtkFontChooser:level: (attributes org.gtk.Property.get=gtk_font_chooser_get_level org.gtk.Property.set=gtk_font_chooser_set_level) * * The level of granularity to offer for selecting fonts. */ g_object_interface_install_property (iface, g_param_spec_flags ("level", NULL, NULL, GTK_TYPE_FONT_CHOOSER_LEVEL, GTK_FONT_CHOOSER_LEVEL_FAMILY | GTK_FONT_CHOOSER_LEVEL_STYLE | GTK_FONT_CHOOSER_LEVEL_SIZE, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY)); /** * GtkFontChooser:font-features: (attributes org.gtk.Property.get=gtk_font_chooser_get_font_features) * * The selected font features. * * The format of the string is compatible with * CSS and with Pango attributes. */ g_object_interface_install_property (iface, g_param_spec_string ("font-features", NULL, NULL, "", GTK_PARAM_READABLE)); /** * GtkFontChooser:language: (attributes org.gtk.Property.get=gtk_font_chooser_get_language org.gtk.Property.set=gtk_font_chooser_set_language) * * The language for which the font features were selected. */ g_object_interface_install_property (iface, g_param_spec_string ("language", NULL, NULL, "", GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY)); /** * GtkFontChooser::font-activated: * @self: the object which received the signal * @fontname: the font name * * Emitted when a font is activated. * * This usually happens when the user double clicks an item, * or an item is selected and the user presses one of the keys * Space, Shift+Space, Return or Enter. */ chooser_signals[SIGNAL_FONT_ACTIVATED] = g_signal_new (I_("font-activated"), GTK_TYPE_FONT_CHOOSER, G_SIGNAL_RUN_FIRST, G_STRUCT_OFFSET (GtkFontChooserIface, font_activated), NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_STRING); } /** * gtk_font_chooser_get_font_family: * @fontchooser: a `GtkFontChooser` * * Gets the `PangoFontFamily` representing the selected font family. * * Font families are a collection of font faces. * * If the selected font is not installed, returns %NULL. * * Returns: (nullable) (transfer none): A `PangoFontFamily` representing the * selected font family */ PangoFontFamily * gtk_font_chooser_get_font_family (GtkFontChooser *fontchooser) { g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL); return GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->get_font_family (fontchooser); } /** * gtk_font_chooser_get_font_face: * @fontchooser: a `GtkFontChooser` * * Gets the `PangoFontFace` representing the selected font group * details (i.e. family, slant, weight, width, etc). * * If the selected font is not installed, returns %NULL. * * Returns: (nullable) (transfer none): A `PangoFontFace` representing the * selected font group details */ PangoFontFace * gtk_font_chooser_get_font_face (GtkFontChooser *fontchooser) { g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL); return GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->get_font_face (fontchooser); } /** * gtk_font_chooser_get_font_size: * @fontchooser: a `GtkFontChooser` * * The selected font size. * * Returns: A n integer representing the selected font size, * or -1 if no font size is selected. */ int gtk_font_chooser_get_font_size (GtkFontChooser *fontchooser) { g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), -1); return GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->get_font_size (fontchooser); } /** * gtk_font_chooser_get_font: (attributes org.gtk.Method.get_property=font) * @fontchooser: a `GtkFontChooser` * * Gets the currently-selected font name. * * Note that this can be a different string than what you set with * [method@Gtk.FontChooser.set_font], as the font chooser widget may * normalize font names and thus return a string with a different * structure. For example, “Helvetica Italic Bold 12” could be * normalized to “Helvetica Bold Italic 12”. * * Use [method@Pango.FontDescription.equal] if you want to compare two * font descriptions. * * Returns: (nullable) (transfer full): A string with the name * of the current font */ char * gtk_font_chooser_get_font (GtkFontChooser *fontchooser) { char *fontname; g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL); g_object_get (fontchooser, "font", &fontname, NULL); return fontname; } /** * gtk_font_chooser_set_font: (attributes org.gtk.Method.set_property=font) * @fontchooser: a `GtkFontChooser` * @fontname: a font name like “Helvetica 12” or “Times Bold 18” * * Sets the currently-selected font. */ void gtk_font_chooser_set_font (GtkFontChooser *fontchooser, const char *fontname) { g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser)); g_return_if_fail (fontname != NULL); g_object_set (fontchooser, "font", fontname, NULL); } /** * gtk_font_chooser_get_font_desc: (attributes org.gtk.Method.get_property=font-desc) * @fontchooser: a `GtkFontChooser` * * Gets the currently-selected font. * * Note that this can be a different string than what you set with * [method@Gtk.FontChooser.set_font], as the font chooser widget may * normalize font names and thus return a string with a different * structure. For example, “Helvetica Italic Bold 12” could be * normalized to “Helvetica Bold Italic 12”. * * Use [method@Pango.FontDescription.equal] if you want to compare two * font descriptions. * * Returns: (nullable) (transfer full): A `PangoFontDescription` for the * current font */ PangoFontDescription * gtk_font_chooser_get_font_desc (GtkFontChooser *fontchooser) { PangoFontDescription *font_desc; g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL); g_object_get (fontchooser, "font-desc", &font_desc, NULL); return font_desc; } /** * gtk_font_chooser_set_font_desc: (attributes org.gtk.Method.set_property=font-desc) * @fontchooser: a `GtkFontChooser` * @font_desc: a `PangoFontDescription` * * Sets the currently-selected font from @font_desc. */ void gtk_font_chooser_set_font_desc (GtkFontChooser *fontchooser, const PangoFontDescription *font_desc) { g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser)); g_return_if_fail (font_desc != NULL); g_object_set (fontchooser, "font-desc", font_desc, NULL); } /** * gtk_font_chooser_get_preview_text: (attributes org.gtk.Method.get_property=preview-text) * @fontchooser: a `GtkFontChooser` * * Gets the text displayed in the preview area. * * Returns: (transfer full): the text displayed in the preview area */ char * gtk_font_chooser_get_preview_text (GtkFontChooser *fontchooser) { char *text; g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL); g_object_get (fontchooser, "preview-text", &text, NULL); return text; } /** * gtk_font_chooser_set_preview_text: (attributes org.gtk.Method.set_property=preview-text) * @fontchooser: a `GtkFontChooser` * @text: (transfer none): the text to display in the preview area * * Sets the text displayed in the preview area. * * The @text is used to show how the selected font looks. */ void gtk_font_chooser_set_preview_text (GtkFontChooser *fontchooser, const char *text) { g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser)); g_return_if_fail (text != NULL); g_object_set (fontchooser, "preview-text", text, NULL); } /** * gtk_font_chooser_get_show_preview_entry: (attributes org.gtk.Method.get_property=show-preview-entry) * @fontchooser: a `GtkFontChooser` * * Returns whether the preview entry is shown or not. * * Returns: %TRUE if the preview entry is shown or %FALSE if it is hidden. */ gboolean gtk_font_chooser_get_show_preview_entry (GtkFontChooser *fontchooser) { gboolean show; g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), FALSE); g_object_get (fontchooser, "show-preview-entry", &show, NULL); return show; } /** * gtk_font_chooser_set_show_preview_entry: (attributes org.gtk.Method.set_property=show-preview-entry) * @fontchooser: a `GtkFontChooser` * @show_preview_entry: whether to show the editable preview entry or not * * Shows or hides the editable preview entry. */ void gtk_font_chooser_set_show_preview_entry (GtkFontChooser *fontchooser, gboolean show_preview_entry) { g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser)); show_preview_entry = show_preview_entry != FALSE; g_object_set (fontchooser, "show-preview-entry", show_preview_entry, NULL); } /** * gtk_font_chooser_set_filter_func: * @fontchooser: a `GtkFontChooser` * @filter: (nullable): a `GtkFontFilterFunc` * @user_data: (closure): data to pass to @filter * @destroy: function to call to free @data when it is no longer needed * * Adds a filter function that decides which fonts to display * in the font chooser. */ void gtk_font_chooser_set_filter_func (GtkFontChooser *fontchooser, GtkFontFilterFunc filter, gpointer user_data, GDestroyNotify destroy) { g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser)); GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->set_filter_func (fontchooser, filter, user_data, destroy); } void _gtk_font_chooser_font_activated (GtkFontChooser *chooser, const char *fontname) { g_return_if_fail (GTK_IS_FONT_CHOOSER (chooser)); g_signal_emit (chooser, chooser_signals[SIGNAL_FONT_ACTIVATED], 0, fontname); } /** * gtk_font_chooser_set_font_map: * @fontchooser: a `GtkFontChooser` * @fontmap: (nullable): a `PangoFontMap` * * Sets a custom font map to use for this font chooser widget. * * A custom font map can be used to present application-specific * fonts instead of or in addition to the normal system fonts. * * ```c * FcConfig *config; * PangoFontMap *fontmap; * * config = FcInitLoadConfigAndFonts (); * FcConfigAppFontAddFile (config, my_app_font_file); * * fontmap = pango_cairo_font_map_new_for_font_type (CAIRO_FONT_TYPE_FT); * pango_fc_font_map_set_config (PANGO_FC_FONT_MAP (fontmap), config); * * gtk_font_chooser_set_font_map (font_chooser, fontmap); * ``` * * Note that other GTK widgets will only be able to use the * application-specific font if it is present in the font map they use: * * ```c * context = gtk_widget_get_pango_context (label); * pango_context_set_font_map (context, fontmap); * ``` */ void gtk_font_chooser_set_font_map (GtkFontChooser *fontchooser, PangoFontMap *fontmap) { g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser)); g_return_if_fail (fontmap == NULL || PANGO_IS_FONT_MAP (fontmap)); if (GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->set_font_map) GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->set_font_map (fontchooser, fontmap); } /** * gtk_font_chooser_get_font_map: * @fontchooser: a `GtkFontChooser` * * Gets the custom font map of this font chooser widget, * or %NULL if it does not have one. * * Returns: (nullable) (transfer full): a `PangoFontMap` */ PangoFontMap * gtk_font_chooser_get_font_map (GtkFontChooser *fontchooser) { PangoFontMap *fontmap = NULL; g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL); if (GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->get_font_map) fontmap = GTK_FONT_CHOOSER_GET_IFACE (fontchooser)->get_font_map (fontchooser); return fontmap; } /** * gtk_font_chooser_set_level: (attributes org.gtk.Method.set_property=level) * @fontchooser: a `GtkFontChooser` * @level: the desired level of granularity * * Sets the desired level of granularity for selecting fonts. */ void gtk_font_chooser_set_level (GtkFontChooser *fontchooser, GtkFontChooserLevel level) { g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser)); g_object_set (fontchooser, "level", level, NULL); } /** * gtk_font_chooser_get_level: (attributes org.gtk.Method.get_property=level) * @fontchooser: a `GtkFontChooser` * * Returns the current level of granularity for selecting fonts. * * Returns: the current granularity level */ GtkFontChooserLevel gtk_font_chooser_get_level (GtkFontChooser *fontchooser) { GtkFontChooserLevel level; g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), 0); g_object_get (fontchooser, "level", &level, NULL); return level; } /** * gtk_font_chooser_get_font_features: (attributes org.gtk.Method.get_property=font-features) * @fontchooser: a `GtkFontChooser` * * Gets the currently-selected font features. * * The format of the returned string is compatible with the * [CSS font-feature-settings property](https://www.w3.org/TR/css-fonts-4/#font-rend-desc). * It can be passed to [func@Pango.AttrFontFeatures.new]. * * Returns: the currently selected font features */ char * gtk_font_chooser_get_font_features (GtkFontChooser *fontchooser) { char *text; g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL); g_object_get (fontchooser, "font-features", &text, NULL); return text; } /** * gtk_font_chooser_get_language: (attributes org.gtk.Method.get_property=language) * @fontchooser: a `GtkFontChooser` * * Gets the language that is used for font features. * * Returns: the currently selected language */ char * gtk_font_chooser_get_language (GtkFontChooser *fontchooser) { char *text; g_return_val_if_fail (GTK_IS_FONT_CHOOSER (fontchooser), NULL); g_object_get (fontchooser, "language", &text, NULL); return text; } /** * gtk_font_chooser_set_language: (attributes org.gtk.Method.set_property=language) * @fontchooser: a `GtkFontChooser` * @language: a language * * Sets the language to use for font features. */ void gtk_font_chooser_set_language (GtkFontChooser *fontchooser, const char *language) { g_return_if_fail (GTK_IS_FONT_CHOOSER (fontchooser)); g_object_set (fontchooser, "language", language, NULL); }