/* GTK - The GIMP Toolkit * 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 #include #include #include "gtkfontchooserwidget.h" #include "gtkfontchooserwidgetprivate.h" #include "gtkadjustment.h" #include "gtkbuildable.h" #include "gtkbox.h" #include "gtkbinlayout.h" #include "gtkcheckbutton.h" #include "gtkcustomfilter.h" #include "gtkentry.h" #include "gtkfilter.h" #include "gtkframe.h" #include "gtkgrid.h" #include "gtkfontchooser.h" #include "gtkfontchooserutils.h" #include "gtkintl.h" #include "gtklabel.h" #include "gtksingleselection.h" #include "gtkstack.h" #include "gtkprivate.h" #include "gtkscale.h" #include "gtkscrolledwindow.h" #include "gtksearchentry.h" #include "gtkspinbutton.h" #include "gtktextview.h" #include "gtkwidgetprivate.h" #include "gtksettings.h" #include "gtkdialog.h" #include "gtkgestureclick.h" #include "gtkeventcontrollerscroll.h" #include "gtkroot.h" #include "gtkfilterlistmodel.h" #include "gtkflattenlistmodel.h" #include "gtkslicelistmodel.h" #include "gtkmaplistmodel.h" #include "gtklistitem.h" #include "gtksignallistitemfactory.h" #include "gtkstringlist.h" #include "gtklistview.h" #include "gtksortlistmodel.h" #include "gtkstringsorter.h" #include #include "language-names.h" #include "script-names.h" #include "open-type-layout.h" /** * GtkFontChooserWidget: * * The `GtkFontChooserWidget` widget lets the user select a font. * * It is used in the `GtkFontChooserDialog` widget to provide a * dialog for selecting fonts. * * To set the font which is initially selected, use * [method@Gtk.FontChooser.set_font] or [method@Gtk.FontChooser.set_font_desc]. * * To get the selected font use [method@Gtk.FontChooser.get_font] or * [method@Gtk.FontChooser.get_font_desc]. * * To change the text which is shown in the preview area, use * [method@Gtk.FontChooser.set_preview_text]. * * # CSS nodes * * `GtkFontChooserWidget` has a single CSS node with name fontchooser. */ typedef struct _GtkFontChooserWidgetClass GtkFontChooserWidgetClass; struct _GtkFontChooserWidget { GtkWidget parent_instance; GtkWidget *stack; GtkWidget *grid; GtkWidget *search_entry; GtkWidget *family_face_list; GtkWidget *list_stack; GtkSingleSelection *selection; GtkCustomFilter *custom_filter; GtkCustomFilter *user_filter; GtkFilterListModel *filter_model; GtkWidget *preview; GtkWidget *preview2; GtkWidget *font_name_label; char *preview_text; gboolean show_preview_entry; gboolean preview_text_set; GtkWidget *size_label; GtkWidget *size_spin; GtkWidget *size_slider; GtkWidget *size_slider2; GtkWidget *axis_grid; GtkWidget *feature_box; GtkFrame *language_button; GtkFrame *language_frame; GtkWidget *language_list; GtkStringList *languages; GHashTable *language_table; PangoLanguage *filter_language; gboolean filter_by_language; gboolean filter_by_monospace; PangoFontMap *font_map; PangoFontDescription *font_desc; char *font_features; PangoLanguage *language; GtkFontFilterFunc filter_func; gpointer filter_data; GDestroyNotify filter_data_destroy; guint last_fontconfig_timestamp; GtkFontChooserLevel level; GHashTable *axes; gboolean updating_variations; GList *feature_items; GAction *tweak_action; hb_map_t *glyphmap; }; struct _GtkFontChooserWidgetClass { GtkWidgetClass parent_class; }; enum { PROP_ZERO, PROP_TWEAK_ACTION }; static void gtk_font_chooser_widget_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gtk_font_chooser_widget_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gtk_font_chooser_widget_finalize (GObject *object); static char *gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser); static void gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser, const char *fontname); static PangoFontDescription *gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *fontchooser); static void gtk_font_chooser_widget_merge_font_desc(GtkFontChooserWidget *fontchooser, const PangoFontDescription *font_desc); static void gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser, PangoFontDescription *font_desc); static const char *gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser); static void gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser, const char *text); static gboolean gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser); static void gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser, gboolean show_preview_entry); static void gtk_font_chooser_widget_populate_features (GtkFontChooserWidget *fontchooser); static void gtk_font_chooser_widget_set_level (GtkFontChooserWidget *fontchooser, GtkFontChooserLevel level); static GtkFontChooserLevel gtk_font_chooser_widget_get_level (GtkFontChooserWidget *fontchooser); static void gtk_font_chooser_widget_set_language (GtkFontChooserWidget *fontchooser, const char *language); static void update_font_features (GtkFontChooserWidget *fontchooser); static void gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface); G_DEFINE_TYPE_WITH_CODE (GtkFontChooserWidget, gtk_font_chooser_widget, GTK_TYPE_WIDGET, G_IMPLEMENT_INTERFACE (GTK_TYPE_FONT_CHOOSER, gtk_font_chooser_widget_iface_init)) static void gtk_font_chooser_widget_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object); switch (prop_id) { case GTK_FONT_CHOOSER_PROP_FONT: gtk_font_chooser_widget_set_font (fontchooser, g_value_get_string (value)); break; case GTK_FONT_CHOOSER_PROP_FONT_DESC: gtk_font_chooser_widget_take_font_desc (fontchooser, g_value_dup_boxed (value)); break; case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT: gtk_font_chooser_widget_set_preview_text (fontchooser, g_value_get_string (value)); fontchooser->preview_text_set = TRUE; break; case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY: gtk_font_chooser_widget_set_show_preview_entry (fontchooser, g_value_get_boolean (value)); break; case GTK_FONT_CHOOSER_PROP_LEVEL: gtk_font_chooser_widget_set_level (fontchooser, g_value_get_flags (value)); break; case GTK_FONT_CHOOSER_PROP_LANGUAGE: gtk_font_chooser_widget_set_language (fontchooser, g_value_get_string (value)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gtk_font_chooser_widget_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object); switch (prop_id) { case PROP_TWEAK_ACTION: g_value_set_object (value, G_OBJECT (fontchooser->tweak_action)); break; case GTK_FONT_CHOOSER_PROP_FONT: g_value_take_string (value, gtk_font_chooser_widget_get_font (fontchooser)); break; case GTK_FONT_CHOOSER_PROP_FONT_DESC: g_value_set_boxed (value, gtk_font_chooser_widget_get_font_desc (fontchooser)); break; case GTK_FONT_CHOOSER_PROP_PREVIEW_TEXT: g_value_set_string (value, gtk_font_chooser_widget_get_preview_text (fontchooser)); break; case GTK_FONT_CHOOSER_PROP_SHOW_PREVIEW_ENTRY: g_value_set_boolean (value, gtk_font_chooser_widget_get_show_preview_entry (fontchooser)); break; case GTK_FONT_CHOOSER_PROP_LEVEL: g_value_set_flags (value, gtk_font_chooser_widget_get_level (fontchooser)); break; case GTK_FONT_CHOOSER_PROP_FONT_FEATURES: g_value_set_string (value, fontchooser->font_features); break; case GTK_FONT_CHOOSER_PROP_LANGUAGE: g_value_set_string (value, pango_language_to_string (fontchooser->language)); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void stop_search_cb (GtkSearchEntry *entry, GtkFontChooserWidget *fc) { if (gtk_editable_get_text (GTK_EDITABLE (entry))[0] != 0) gtk_editable_set_text (GTK_EDITABLE (entry), ""); else { GtkWidget *dialog; GtkWidget *button = NULL; dialog = gtk_widget_get_ancestor (GTK_WIDGET (fc), GTK_TYPE_DIALOG); if (dialog) button = gtk_dialog_get_widget_for_response (GTK_DIALOG (dialog), GTK_RESPONSE_CANCEL); if (button) gtk_widget_activate (button); } } static void size_change_cb (GtkAdjustment *adjustment, gpointer user_data) { GtkFontChooserWidget *fontchooser = user_data; PangoFontDescription *font_desc; double size = gtk_adjustment_get_value (adjustment); font_desc = pango_font_description_new (); if (pango_font_description_get_size_is_absolute (fontchooser->font_desc)) pango_font_description_set_absolute_size (font_desc, size * PANGO_SCALE); else pango_font_description_set_size (font_desc, size * PANGO_SCALE); gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc); } static gboolean output_cb (GtkSpinButton *spin, gpointer data) { GtkAdjustment *adjustment; char *text; double value; adjustment = gtk_spin_button_get_adjustment (spin); value = gtk_adjustment_get_value (adjustment); text = g_strdup_printf ("%2.4g", value); gtk_editable_set_text (GTK_EDITABLE (spin), text); g_free (text); return TRUE; } static gboolean user_filter_cb (gpointer item, gpointer data) { GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (data); PangoFontFamily *family; PangoFontFace *face; if (PANGO_IS_FONT_FAMILY (item)) { family = item; face = pango_font_family_get_face (family, NULL); } else { face = PANGO_FONT_FACE (item); family = pango_font_face_get_family (face); } if (self->filter_by_monospace && !pango_font_family_is_monospace (family)) return FALSE; if (self->filter_by_language && self->filter_language) { PangoFontDescription *desc; PangoContext *context; PangoFont *font; gboolean ret; PangoLanguage **langs; desc = pango_font_face_describe (face); pango_font_description_set_size (desc, 20); context = gtk_widget_get_pango_context (GTK_WIDGET (self)); font = pango_context_load_font (context, desc); ret = FALSE; langs = pango_font_get_languages (font); if (langs) { for (int i = 0; langs[i]; i++) { if (langs[i] == self->filter_language) { ret = TRUE; break; } } } g_object_unref (font); pango_font_description_free (desc); return ret; } return TRUE; } static void monospace_check_changed (GtkCheckButton *check, GParamSpec *pspec, GtkFontChooserWidget *self) { self->filter_by_monospace = gtk_check_button_get_active (check); gtk_filter_changed (GTK_FILTER (self->user_filter), self->filter_by_monospace ? GTK_FILTER_CHANGE_MORE_STRICT : GTK_FILTER_CHANGE_LESS_STRICT); } static void language_check_changed (GtkCheckButton *check, GParamSpec *pspec, GtkFontChooserWidget *self) { self->filter_by_language = gtk_check_button_get_active (check); gtk_filter_changed (GTK_FILTER (self->user_filter), self->filter_by_language ? GTK_FILTER_CHANGE_MORE_STRICT : GTK_FILTER_CHANGE_LESS_STRICT); } static void gtk_font_chooser_widget_update_marks (GtkFontChooserWidget *self) { GtkAdjustment *adj, *spin_adj; const int *sizes; int *font_sizes; int i, n_sizes; double value, spin_value; gpointer item; item = gtk_single_selection_get_selected_item (self->selection); if (item) { PangoFontFace *face; if (PANGO_IS_FONT_FAMILY (item)) face = pango_font_family_get_face (item, NULL); else face = item; pango_font_face_list_sizes (face, &font_sizes, &n_sizes); /* It seems not many fonts actually have a sane set of sizes */ for (i = 0; i < n_sizes; i++) font_sizes[i] = font_sizes[i] / PANGO_SCALE; } else { font_sizes = NULL; n_sizes = 0; } if (n_sizes < 2) { static const int fallback_sizes[] = { 6, 8, 9, 10, 11, 12, 13, 14, 16, 20, 24, 36, 48, 72 }; sizes = fallback_sizes; n_sizes = G_N_ELEMENTS (fallback_sizes); } else { sizes = font_sizes; } gtk_scale_clear_marks (GTK_SCALE (self->size_slider)); gtk_scale_clear_marks (GTK_SCALE (self->size_slider2)); adj = gtk_range_get_adjustment (GTK_RANGE (self->size_slider)); spin_adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (self->size_spin)); spin_value = gtk_adjustment_get_value (spin_adj); if (spin_value < sizes[0]) value = (double) sizes[0]; else if (spin_value > sizes[n_sizes - 1]) value = (double)sizes[n_sizes - 1]; else value = (double)spin_value; /* ensure clamping doesn't callback into font resizing code */ g_signal_handlers_block_by_func (adj, size_change_cb, self); gtk_adjustment_configure (adj, value, sizes[0], sizes[n_sizes - 1], gtk_adjustment_get_step_increment (adj), gtk_adjustment_get_page_increment (adj), gtk_adjustment_get_page_size (adj)); g_signal_handlers_unblock_by_func (adj, size_change_cb, self); for (i = 0; i < n_sizes; i++) { gtk_scale_add_mark (GTK_SCALE (self->size_slider), sizes[i], GTK_POS_BOTTOM, NULL); gtk_scale_add_mark (GTK_SCALE (self->size_slider2), sizes[i], GTK_POS_BOTTOM, NULL); } g_free (font_sizes); } static void row_activated_cb (GtkWidget *view, guint pos, gpointer user_data) { GtkFontChooserWidget *fontchooser = user_data; char *fontname; fontname = gtk_font_chooser_widget_get_font (fontchooser); _gtk_font_chooser_font_activated (GTK_FONT_CHOOSER (fontchooser), fontname); g_free (fontname); } static void resize_by_scroll_cb (GtkEventControllerScroll *controller, double dx, double dy, gpointer user_data) { GtkFontChooserWidget *self = user_data; GtkAdjustment *adj = gtk_spin_button_get_adjustment (GTK_SPIN_BUTTON (self->size_spin)); gtk_adjustment_set_value (adj, gtk_adjustment_get_value (adj) + gtk_adjustment_get_step_increment (adj) * dx); } static void maybe_update_preview_text (GtkFontChooserWidget *self, PangoFontFace *face, PangoFontDescription *desc) { PangoContext *context; PangoFont *font; const char *sample; PangoLanguage **languages; GHashTable *langs = NULL; PangoLanguage *default_lang; PangoLanguage *alt_default = NULL; PangoLanguage *lang = NULL; int i; const char *p; /* If the user has typed text into the entry, we don't touch it */ if (self->preview_text_set) return; if (self->filter_by_language && self->filter_language) { sample = pango_language_get_sample_string (self->filter_language); gtk_font_chooser_widget_set_preview_text (self, sample); return; } /* We do the work only once, and cache the result on the PangoFontFace */ sample = (const char *)g_object_get_data (G_OBJECT (face), "gtk-sample-text"); if (sample) { gtk_font_chooser_widget_set_preview_text (self, sample); return; } context = gtk_widget_get_pango_context (GTK_WIDGET (self)); font = pango_context_load_font (context, desc); default_lang = pango_language_get_default (); p = pango_language_to_string (default_lang); /* The default language tends to be of the form en-us. * Since fontconfig languages just have the language part, * and we want to use direct pointer comparisons, we need * an PangoLanguage for the shortened default language. */ if (strchr (p, '-')) { char q[10]; for (i = 0; p[i] != '-' && i < 9; i++) q[i] = p[i]; q[i] = '\0'; alt_default = pango_language_from_string (q); } languages = pango_font_get_languages (font); /* If the font supports the default language, just use it. */ if (languages) for (i = 0; languages[i]; i++) { if (languages[i] == default_lang || languages[i] == alt_default) { lang = default_lang; goto found; } } /* Otherwise, we make a list of representative languages */ langs = g_hash_table_new (NULL, NULL); if (languages) for (i = 0; languages[i]; i++) { const PangoScript *scripts; int num, j; scripts = pango_language_get_scripts (languages[i], &num); for (j = 0; j < num; j++) { lang = pango_script_get_sample_language (scripts[j]); if (lang) g_hash_table_add (langs, lang); } } /* ... and compare it to the users default and preferred languages */ if (g_hash_table_contains (langs, default_lang) || g_hash_table_contains (langs, alt_default)) { lang = default_lang; } else { PangoLanguage **preferred; preferred = pango_language_get_preferred (); if (preferred) { for (i = 0; preferred[i]; i++) { if (g_hash_table_contains (langs, preferred[i])) { lang = preferred[i]; break; } } } g_hash_table_unref (langs); found: sample = pango_language_get_sample_string (lang); gtk_font_chooser_widget_set_preview_text (self, sample); g_object_set_data (G_OBJECT (face), "gtk-sample-text", (gpointer)sample); } g_object_unref (font); } static void selection_changed_cb (GtkSingleSelection *selection, GParamSpec *pspec, GtkFontChooserWidget *self) { gpointer item; item = gtk_single_selection_get_selected_item (selection); if (item) { PangoFontFace *face; PangoFontDescription *desc; if (PANGO_IS_FONT_FAMILY (item)) face = pango_font_family_get_face (item, NULL); else face = item; desc = pango_font_face_describe (face); pango_font_description_set_variations (self->font_desc, NULL); gtk_font_chooser_widget_merge_font_desc (self, desc); g_simple_action_set_enabled (G_SIMPLE_ACTION (self->tweak_action), TRUE); maybe_update_preview_text (self, face, desc); pango_font_description_free (desc); } else { g_simple_action_set_state (G_SIMPLE_ACTION (self->tweak_action), g_variant_new_boolean (FALSE)); g_simple_action_set_enabled (G_SIMPLE_ACTION (self->tweak_action), FALSE); } g_object_notify (G_OBJECT (self), "font"); g_object_notify (G_OBJECT (self), "font-desc"); } static char * get_font_name (GObject *ignore, gpointer item) { if (item == NULL) return NULL; if (PANGO_IS_FONT_FACE (item)) { return g_strconcat (pango_font_family_get_name (pango_font_face_get_family (item)), " ", pango_font_face_get_face_name (item), NULL); } else { return g_strdup (pango_font_family_get_name (item)); } } static PangoAttrList * get_font_attributes (GObject *ignore, gpointer item) { PangoAttribute *attribute; PangoAttrList *attrs; attrs = pango_attr_list_new (); if (item) { PangoFontFace *face; PangoFontDescription *font_desc; if (PANGO_IS_FONT_FAMILY (item)) face = pango_font_family_get_face (item, NULL); else face = item; if (face) { font_desc = pango_font_face_describe (face); attribute = pango_attr_font_desc_new (font_desc); pango_attr_list_insert (attrs, attribute); pango_font_description_free (font_desc); } } return attrs; } static void gtk_font_chooser_widget_update_preview_attributes (GtkFontChooserWidget *fontchooser) { PangoAttrList *attrs; attrs = pango_attr_list_new (); /* Prevent font fallback */ pango_attr_list_insert (attrs, pango_attr_fallback_new (FALSE)); /* Force current font and features */ pango_attr_list_insert (attrs, pango_attr_font_desc_new (fontchooser->font_desc)); if (fontchooser->font_features) pango_attr_list_insert (attrs, pango_attr_font_features_new (fontchooser->font_features)); if (fontchooser->language) pango_attr_list_insert (attrs, pango_attr_language_new (fontchooser->language)); gtk_entry_set_attributes (GTK_ENTRY (fontchooser->preview), attrs); pango_attr_list_unref (attrs); } static void rows_changed_cb (GtkFontChooserWidget *self) { const char *page; if (g_list_model_get_n_items (G_LIST_MODEL (self->selection)) == 0 && gtk_filter_list_model_get_pending (GTK_FILTER_LIST_MODEL (self->filter_model)) == 0) page = "empty"; else page = "list"; if (strcmp (gtk_stack_get_visible_child_name (GTK_STACK (self->list_stack)), page) != 0) gtk_stack_set_visible_child_name (GTK_STACK (self->list_stack), page); } static void update_key_capture (GtkWidget *chooser) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser); GtkWidget *capture_widget; if (gtk_widget_get_mapped (chooser) && g_str_equal (gtk_stack_get_visible_child_name (GTK_STACK (fontchooser->stack)), "list")) { GtkWidget *toplevel; GtkWidget *focus; toplevel = GTK_WIDGET (gtk_widget_get_root (chooser)); focus = gtk_root_get_focus (GTK_ROOT (toplevel)); if (GTK_IS_EDITABLE (focus) && focus != fontchooser->search_entry) capture_widget = NULL; else capture_widget = chooser; } else capture_widget = NULL; gtk_search_entry_set_key_capture_widget (GTK_SEARCH_ENTRY (fontchooser->search_entry), capture_widget); } static void gtk_font_chooser_widget_map (GtkWidget *widget) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget); gtk_editable_set_text (GTK_EDITABLE (fontchooser->search_entry), ""); gtk_stack_set_visible_child_name (GTK_STACK (fontchooser->stack), "list"); g_simple_action_set_state (G_SIMPLE_ACTION (fontchooser->tweak_action), g_variant_new_boolean (FALSE)); GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->map (widget); update_key_capture (widget); } static void gtk_font_chooser_widget_unmap (GtkWidget *widget) { update_key_capture (widget); GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->unmap (widget); } static void gtk_font_chooser_widget_root (GtkWidget *widget) { GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->root (widget); g_signal_connect_swapped (gtk_widget_get_root (widget), "notify::focus-widget", G_CALLBACK (update_key_capture), widget); } static void gtk_font_chooser_widget_unroot (GtkWidget *widget) { g_signal_handlers_disconnect_by_func (gtk_widget_get_root (widget), update_key_capture, widget); GTK_WIDGET_CLASS (gtk_font_chooser_widget_parent_class)->unroot (widget); } static void gtk_font_chooser_widget_dispose (GObject *object) { GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (object); g_signal_handlers_disconnect_by_func (self->selection, rows_changed_cb, self); g_signal_handlers_disconnect_by_func (self->filter_model, rows_changed_cb, self); self->filter_func = NULL; g_clear_pointer (&self->filter_data, self->filter_data_destroy); g_clear_pointer (&self->stack, gtk_widget_unparent); g_clear_pointer (&self->language_table, g_hash_table_unref); G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->dispose (object); } static void gtk_font_chooser_widget_class_init (GtkFontChooserWidgetClass *klass) { GObjectClass *gobject_class = G_OBJECT_CLASS (klass); GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass); GParamSpec *pspec; g_type_ensure (G_TYPE_THEMED_ICON); widget_class->root = gtk_font_chooser_widget_root; widget_class->unroot = gtk_font_chooser_widget_unroot; widget_class->map = gtk_font_chooser_widget_map; widget_class->unmap = gtk_font_chooser_widget_unmap; gobject_class->finalize = gtk_font_chooser_widget_finalize; gobject_class->dispose = gtk_font_chooser_widget_dispose; gobject_class->set_property = gtk_font_chooser_widget_set_property; gobject_class->get_property = gtk_font_chooser_widget_get_property; /** * GtkFontChooserWidget:tweak-action: * * A toggle action that can be used to switch to the tweak page * of the font chooser widget, which lets the user tweak the * OpenType features and variation axes of the selected font. * * The action will be enabled or disabled depending on whether * the selected font has any features or axes. */ pspec = g_param_spec_object ("tweak-action", P_("The tweak action"), P_("The toggle action to switch to the tweak page"), G_TYPE_ACTION, G_PARAM_READABLE | G_PARAM_STATIC_STRINGS); g_object_class_install_property (gobject_class, PROP_TWEAK_ACTION, pspec); _gtk_font_chooser_install_properties (gobject_class); /* Bind class to template */ gtk_widget_class_set_template_from_resource (widget_class, "/org/gtk/libgtk/ui/gtkfontchooserwidget.ui"); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, search_entry); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, family_face_list); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, list_stack); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, filter_model); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, selection); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, custom_filter); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, user_filter); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, preview); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, preview2); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, size_label); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, size_spin); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, size_slider); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, size_slider2); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, stack); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, grid); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, font_name_label); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, feature_box); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, axis_grid); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, language_button); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, language_frame); gtk_widget_class_bind_template_child (widget_class, GtkFontChooserWidget, language_list); gtk_widget_class_bind_template_callback (widget_class, get_font_name); gtk_widget_class_bind_template_callback (widget_class, get_font_attributes); gtk_widget_class_bind_template_callback (widget_class, stop_search_cb); gtk_widget_class_bind_template_callback (widget_class, row_activated_cb); gtk_widget_class_bind_template_callback (widget_class, rows_changed_cb); gtk_widget_class_bind_template_callback (widget_class, size_change_cb); gtk_widget_class_bind_template_callback (widget_class, output_cb); gtk_widget_class_bind_template_callback (widget_class, selection_changed_cb); gtk_widget_class_bind_template_callback (widget_class, resize_by_scroll_cb); gtk_widget_class_bind_template_callback (widget_class, monospace_check_changed); gtk_widget_class_bind_template_callback (widget_class, language_check_changed); gtk_widget_class_set_layout_manager_type (widget_class, GTK_TYPE_BIN_LAYOUT); gtk_widget_class_set_css_name (widget_class, I_("fontchooser")); } static void change_tweak (GSimpleAction *action, GVariant *state, gpointer data) { GtkFontChooserWidget *fontchooser = data; gboolean tweak = g_variant_get_boolean (state); if (tweak) { gtk_entry_grab_focus_without_selecting (GTK_ENTRY (fontchooser->preview2)); gtk_stack_set_visible_child_name (GTK_STACK (fontchooser->stack), "tweaks"); } else { gtk_widget_grab_focus (fontchooser->search_entry); gtk_stack_set_visible_child_name (GTK_STACK (fontchooser->stack), "list"); } g_simple_action_set_state (action, state); } typedef struct { guint32 tag; float default_value; GtkAdjustment *adjustment; GtkWidget *label; GtkWidget *scale; GtkWidget *spin; GtkWidget *fontchooser; } Axis; static guint axis_hash (gconstpointer v) { const Axis *a = v; return a->tag; } static gboolean axis_equal (gconstpointer v1, gconstpointer v2) { const Axis *a1 = v1; const Axis *a2 = v2; return a1->tag == a2->tag; } static void axis_remove (gpointer key, gpointer value, gpointer data) { GtkFontChooserWidget *fontchooser = data; Axis *a = value; gtk_grid_remove (GTK_GRID (fontchooser->axis_grid), a->label); gtk_grid_remove (GTK_GRID (fontchooser->axis_grid), a->scale); gtk_grid_remove (GTK_GRID (fontchooser->axis_grid), a->spin); } static void axis_free (gpointer v) { Axis *a = v; g_free (a); } static void select_added (GListModel *model, guint position, guint removed, guint added, gpointer data) { GtkSingleSelection *selection = GTK_SINGLE_SELECTION (model); g_assert (removed == 0); g_assert (added == 1); gtk_single_selection_set_selected (selection, position); } static void add_languages_from_font (GtkFontChooserWidget *self, gpointer item) { PangoFontFace *face; PangoFontDescription *desc; PangoFont *font; PangoContext *context; GtkSelectionModel *model = gtk_list_view_get_model (GTK_LIST_VIEW (self->language_list)); PangoLanguage *default_lang = pango_language_get_default (); PangoLanguage **langs; int i; if (PANGO_IS_FONT_FAMILY (item)) face = pango_font_family_get_face (PANGO_FONT_FAMILY (item), NULL); else face = PANGO_FONT_FACE (item); if (!face) return; desc = pango_font_face_describe (face); pango_font_description_set_size (desc, 20); context = gtk_widget_get_pango_context (GTK_WIDGET (self)); font = pango_context_load_font (context, desc); langs = pango_font_get_languages (font); if (langs) { for (i = 0; langs[i]; i++) { if (!g_hash_table_contains (self->language_table, langs[i])) { g_hash_table_add (self->language_table, langs[i]); if (get_language_name (langs[i])) { const char *l = pango_language_to_string (langs[i]); gulong id = 0; /* Pre-select the default language */ if (pango_language_matches (default_lang, l)) id = g_signal_connect (model, "items-changed", G_CALLBACK (select_added), NULL); gtk_string_list_append (self->languages, l); if (id) g_signal_handler_disconnect (model, id); } } } } g_object_unref (font); pango_font_description_free (desc); } static gboolean gtk_font_chooser_widget_ensure_matching_selection (GtkFontChooserWidget *self); /* We incrementally populate our fontlist to prevent blocking * the font chooser for a long time with expensive FcFontSort * calls in pango for every row in the list). */ static gboolean add_to_fontlist (GtkWidget *widget, GdkFrameClock *clock, gpointer user_data) { GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (widget); GtkSliceListModel *model = user_data; GListModel *child_model; guint i G_GNUC_UNUSED; guint n G_GNUC_UNUSED; if (gtk_filter_list_model_get_model (self->filter_model) != G_LIST_MODEL (model)) return G_SOURCE_REMOVE; child_model = gtk_slice_list_model_get_model (model); n = gtk_slice_list_model_get_size (model); for (i = n; i < n + 10; i++) { gpointer item = g_list_model_get_item (child_model, i); if (!item) break; add_languages_from_font (self, item); g_object_unref (item); } n += 10; if (n >= g_list_model_get_n_items (child_model)) n = G_MAXUINT; gtk_slice_list_model_set_size (model, n); if (gtk_single_selection_get_selected (GTK_SINGLE_SELECTION (self->selection)) == GTK_INVALID_LIST_POSITION) gtk_font_chooser_widget_ensure_matching_selection (self); if (n == G_MAXUINT) return G_SOURCE_REMOVE; else return G_SOURCE_CONTINUE; } static void update_fontlist (GtkFontChooserWidget *self) { PangoFontMap *fontmap; GListModel *model; fontmap = self->font_map; if (!fontmap) fontmap = pango_cairo_font_map_get_default (); if ((self->level & GTK_FONT_CHOOSER_LEVEL_STYLE) == 0) model = g_object_ref (G_LIST_MODEL (fontmap)); else model = G_LIST_MODEL (gtk_flatten_list_model_new (G_LIST_MODEL (g_object_ref (fontmap)))); model = G_LIST_MODEL (gtk_slice_list_model_new (model, 0, 20)); gtk_widget_add_tick_callback (GTK_WIDGET (self), add_to_fontlist, g_object_ref (model), g_object_unref); gtk_filter_list_model_set_model (self->filter_model, model); g_object_unref (model); } static void setup_lang_item (GtkSignalListItemFactory *factory, gpointer item, gpointer data) { GtkWidget *label; label = gtk_label_new (NULL); gtk_label_set_xalign (GTK_LABEL (label), 0); gtk_list_item_set_child (GTK_LIST_ITEM (item), label); } static void bind_lang_item (GtkSignalListItemFactory *factory, gpointer item, gpointer data) { GtkWidget *label; gpointer obj; const char *str; PangoLanguage *language; const char *name; obj = gtk_list_item_get_item (GTK_LIST_ITEM (item)); str = gtk_string_object_get_string (GTK_STRING_OBJECT (obj)); language = pango_language_from_string (str); name = get_language_name (language); label = gtk_list_item_get_child (GTK_LIST_ITEM (item)); gtk_label_set_label (GTK_LABEL (label), name); } static char * get_lang_name (gpointer this, const char *lang) { return g_strdup (get_language_name (pango_language_from_string (lang))); } static void language_selection_changed (GtkSelectionModel *model, guint position, guint n_items, GtkFontChooserWidget *self) { gpointer obj; obj = gtk_single_selection_get_selected_item (GTK_SINGLE_SELECTION (model)); if (obj) self->filter_language = pango_language_from_string (gtk_string_object_get_string (obj)); else self->filter_language = NULL; if (self->filter_by_language) gtk_filter_changed (GTK_FILTER (self->user_filter), GTK_FILTER_CHANGE_DIFFERENT); } static gboolean setup_language_list (GtkFontChooserWidget *self) { GtkListItemFactory *factory; GtkExpression *expression; GListModel *model; GtkSelectionModel *selection; self->languages = gtk_string_list_new (NULL); self->language_table = g_hash_table_new (NULL, NULL); expression = gtk_property_expression_new (GTK_TYPE_STRING_OBJECT, NULL, "string"); expression = gtk_cclosure_expression_new (G_TYPE_STRING, NULL, 1, &expression, (GCallback)get_lang_name, NULL, NULL); model = G_LIST_MODEL (gtk_sort_list_model_new (G_LIST_MODEL (self->languages), GTK_SORTER (gtk_string_sorter_new (expression)))); selection = GTK_SELECTION_MODEL (gtk_single_selection_new (model)); g_signal_connect (selection, "selection-changed", G_CALLBACK (language_selection_changed), self); gtk_list_view_set_model (GTK_LIST_VIEW (self->language_list), selection); g_object_unref (selection); factory = gtk_signal_list_item_factory_new (); g_signal_connect (factory, "setup", G_CALLBACK (setup_lang_item), self); g_signal_connect (factory, "bind", G_CALLBACK (bind_lang_item), self); gtk_list_view_set_factory (GTK_LIST_VIEW (self->language_list), factory); g_object_unref (factory); return TRUE; } static void gtk_font_chooser_widget_init (GtkFontChooserWidget *self) { gtk_widget_init_template (GTK_WIDGET (self)); self->axes = g_hash_table_new_full (axis_hash, axis_equal, NULL, axis_free); /* Default preview string */ self->preview_text = g_strdup (pango_language_get_sample_string (NULL)); self->show_preview_entry = TRUE; self->font_desc = pango_font_description_new (); self->level = GTK_FONT_CHOOSER_LEVEL_FAMILY | GTK_FONT_CHOOSER_LEVEL_STYLE | GTK_FONT_CHOOSER_LEVEL_SIZE; self->language = pango_language_get_default (); /* Set default preview text */ gtk_editable_set_text (GTK_EDITABLE (self->preview), self->preview_text); gtk_font_chooser_widget_update_preview_attributes (self); /* Set the upper values of the spin/scale with G_MAXINT / PANGO_SCALE */ gtk_spin_button_set_range (GTK_SPIN_BUTTON (self->size_spin), 1.0, (double)(G_MAXINT / PANGO_SCALE)); gtk_adjustment_set_upper (gtk_range_get_adjustment (GTK_RANGE (self->size_slider)), (double)(G_MAXINT / PANGO_SCALE)); self->tweak_action = G_ACTION (g_simple_action_new_stateful ("tweak", NULL, g_variant_new_boolean (FALSE))); g_signal_connect (self->tweak_action, "change-state", G_CALLBACK (change_tweak), self); update_fontlist (self); /* Load data and set initial style-dependent parameters */ gtk_font_chooser_widget_populate_features (self); gtk_font_chooser_widget_take_font_desc (self, NULL); gtk_custom_filter_set_filter_func (self->user_filter, user_filter_cb, self, NULL); setup_language_list (self); } /** * gtk_font_chooser_widget_new: * * Creates a new `GtkFontChooserWidget`. * * Returns: a new `GtkFontChooserWidget` */ GtkWidget * gtk_font_chooser_widget_new (void) { return g_object_new (GTK_TYPE_FONT_CHOOSER_WIDGET, NULL); } static void gtk_font_chooser_widget_finalize (GObject *object) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (object); if (fontchooser->font_desc) pango_font_description_free (fontchooser->font_desc); if (fontchooser->filter_data_destroy) fontchooser->filter_data_destroy (fontchooser->filter_data); g_free (fontchooser->preview_text); g_clear_object (&fontchooser->font_map); g_object_unref (fontchooser->tweak_action); g_list_free_full (fontchooser->feature_items, g_free); g_hash_table_unref (fontchooser->axes); g_free (fontchooser->font_features); G_OBJECT_CLASS (gtk_font_chooser_widget_parent_class)->finalize (object); } static gboolean my_pango_font_family_equal (const char *familya, const char *familyb) { return g_ascii_strcasecmp (familya, familyb) == 0; } static gboolean gtk_font_chooser_widget_ensure_matching_selection (GtkFontChooserWidget *self) { const char *desc_family; guint i, n; desc_family = pango_font_description_get_family (self->font_desc); if (desc_family == NULL) { gtk_single_selection_set_selected (self->selection, GTK_INVALID_LIST_POSITION); return TRUE; } n = g_list_model_get_n_items (G_LIST_MODEL (self->selection)); for (i = 0; i < n; i++) { gpointer item; PangoFontFace *face; PangoFontFamily *family; PangoFontDescription *merged; item = g_list_model_get_item (G_LIST_MODEL (self->selection), i); g_object_unref (item); if (PANGO_IS_FONT_FAMILY (item)) { family = item; face = pango_font_family_get_face (family, NULL); } else { face = item; family = pango_font_face_get_family (face); } if (!my_pango_font_family_equal (desc_family, pango_font_family_get_name (family))) continue; merged = pango_font_face_describe (face); pango_font_description_merge_static (merged, self->font_desc, FALSE); if (pango_font_description_equal (merged, self->font_desc)) { pango_font_description_free (merged); break; } pango_font_description_free (merged); } if (i < n) { gtk_single_selection_set_selected (self->selection, i); return TRUE; } return FALSE; } static PangoFontFace * gtk_font_chooser_widget_get_face (GtkFontChooser *chooser) { GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (chooser); gpointer item; item = gtk_single_selection_get_selected_item (self->selection); if (PANGO_IS_FONT_FAMILY (item)) return pango_font_family_get_face (item, NULL); else return item; } static PangoFontFamily * gtk_font_chooser_widget_get_family (GtkFontChooser *chooser) { GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (chooser); gpointer item; item = gtk_single_selection_get_selected_item (self->selection); if (item == NULL) return NULL; if (PANGO_IS_FONT_FAMILY (item)) return item; else return pango_font_face_get_family (item); } static int gtk_font_chooser_widget_get_size (GtkFontChooser *chooser) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser); PangoFontDescription *desc = gtk_font_chooser_widget_get_font_desc (fontchooser); if (desc) return pango_font_description_get_size (desc); return -1; } static char * gtk_font_chooser_widget_get_font (GtkFontChooserWidget *fontchooser) { PangoFontDescription *desc = gtk_font_chooser_widget_get_font_desc (fontchooser); if (desc) return pango_font_description_to_string (desc); return NULL; } static PangoFontDescription * gtk_font_chooser_widget_get_font_desc (GtkFontChooserWidget *self) { if (gtk_single_selection_get_selected_item (self->selection)) return self->font_desc; return NULL; } static void gtk_font_chooser_widget_set_font (GtkFontChooserWidget *fontchooser, const char *fontname) { PangoFontDescription *font_desc; font_desc = pango_font_description_from_string (fontname); gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc); } /* OpenType variations */ static void add_font_variations (GtkFontChooserWidget *fontchooser, GString *s) { GHashTableIter iter; Axis *axis; const char *sep = ""; char buf[G_ASCII_DTOSTR_BUF_SIZE]; g_hash_table_iter_init (&iter, fontchooser->axes); while (g_hash_table_iter_next (&iter, (gpointer *)NULL, (gpointer *)&axis)) { char tag[5]; double value; value = gtk_adjustment_get_value (axis->adjustment); if (value == axis->default_value) continue; tag[0] = (axis->tag >> 24) & 0xff; tag[1] = (axis->tag >> 16) & 0xff; tag[2] = (axis->tag >> 8) & 0xff; tag[3] = (axis->tag >> 0) & 0xff; tag[4] = '\0'; g_string_append_printf (s, "%s%s=%s", sep, tag, g_ascii_dtostr (buf, sizeof(buf), value)); sep = ","; } } static void adjustment_changed (GtkAdjustment *adjustment, Axis *axis) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (axis->fontchooser); PangoFontDescription *font_desc; GString *s; fontchooser->updating_variations = TRUE; s = g_string_new (""); add_font_variations (fontchooser, s); font_desc = pango_font_description_new (); pango_font_description_set_variations (font_desc, s->str); gtk_font_chooser_widget_take_font_desc (fontchooser, font_desc); g_string_free (s, TRUE); fontchooser->updating_variations = FALSE; } static gboolean should_show_axis (hb_ot_var_axis_info_t *ax) { if (ax->flags & HB_OT_VAR_AXIS_FLAG_HIDDEN) return FALSE; return TRUE; } static gboolean is_named_instance (hb_font_t *font) { /* FIXME */ return FALSE; } static struct { guint32 tag; const char *name; } axis_names[] = { { HB_OT_TAG_VAR_AXIS_WIDTH, N_("Width") }, { HB_OT_TAG_VAR_AXIS_WEIGHT, N_("Weight") }, { HB_OT_TAG_VAR_AXIS_ITALIC, N_("Italic") }, { HB_OT_TAG_VAR_AXIS_SLANT, N_("Slant") }, { HB_OT_TAG_VAR_AXIS_OPTICAL_SIZE, N_("Optical Size") }, }; static gboolean add_axis (GtkFontChooserWidget *fontchooser, hb_font_t *hb_font, hb_ot_var_axis_info_t *ax, int value, int row) { hb_face_t *hb_face; Axis *axis; const char *name; char buffer[20]; unsigned int buffer_len = 20; int i; hb_face = hb_font_get_face (hb_font); axis = g_new (Axis, 1); axis->tag = ax->tag; axis->default_value = ax->default_value; axis->fontchooser = GTK_WIDGET (fontchooser); hb_ot_name_get_utf8 (hb_face, ax->name_id, HB_LANGUAGE_INVALID, &buffer_len, buffer); name = buffer; for (i = 0; i < G_N_ELEMENTS (axis_names); i++) { if (axis_names[i].tag == ax->tag) { name = _(axis_names[i].name); break; } } axis->label = gtk_label_new (name); gtk_widget_set_halign (axis->label, GTK_ALIGN_START); gtk_widget_set_valign (axis->label, GTK_ALIGN_BASELINE); gtk_grid_attach (GTK_GRID (fontchooser->axis_grid), axis->label, 0, row, 1, 1); axis->adjustment = gtk_adjustment_new ((double)value, (double)ax->min_value, (double)ax->max_value, 1.0, 10.0, 0.0); axis->scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, axis->adjustment); gtk_scale_add_mark (GTK_SCALE (axis->scale), (double)ax->default_value, GTK_POS_TOP, NULL); gtk_widget_set_valign (axis->scale, GTK_ALIGN_BASELINE); gtk_widget_set_hexpand (axis->scale, TRUE); gtk_widget_set_size_request (axis->scale, 100, -1); gtk_scale_set_draw_value (GTK_SCALE (axis->scale), FALSE); gtk_grid_attach (GTK_GRID (fontchooser->axis_grid), axis->scale, 1, row, 1, 1); axis->spin = gtk_spin_button_new (axis->adjustment, 0, 0); g_signal_connect (axis->spin, "output", G_CALLBACK (output_cb), fontchooser); gtk_widget_set_valign (axis->spin, GTK_ALIGN_BASELINE); gtk_grid_attach (GTK_GRID (fontchooser->axis_grid), axis->spin, 2, row, 1, 1); g_hash_table_add (fontchooser->axes, axis); adjustment_changed (axis->adjustment, axis); g_signal_connect (axis->adjustment, "value-changed", G_CALLBACK (adjustment_changed), axis); if (is_named_instance (hb_font) || !should_show_axis (ax)) { gtk_widget_hide (axis->label); gtk_widget_hide (axis->scale); gtk_widget_hide (axis->spin); return FALSE; } return TRUE; } /* FIXME: This doesn't work if the font has an avar table */ static float denorm_coord (hb_ot_var_axis_info_t *axis, int coord) { float r = coord / 16384.0; if (coord < 0) return axis->default_value + r * (axis->default_value - axis->min_value); else return axis->default_value + r * (axis->max_value - axis->default_value); } static gboolean gtk_font_chooser_widget_update_font_variations (GtkFontChooserWidget *fontchooser) { PangoFont *pango_font; hb_font_t *hb_font; hb_face_t *hb_face; const int *coords; unsigned int n_coords; unsigned int n_axes; hb_ot_var_axis_info_t *axes; gboolean has_axis = FALSE; int i; if (fontchooser->updating_variations) return FALSE; g_hash_table_foreach (fontchooser->axes, axis_remove, fontchooser); g_hash_table_remove_all (fontchooser->axes); if ((fontchooser->level & GTK_FONT_CHOOSER_LEVEL_VARIATIONS) == 0) return FALSE; pango_font = pango_context_load_font (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)), fontchooser->font_desc); hb_font = pango_font_get_hb_font (pango_font); hb_face = hb_font_get_face (hb_font); if (!hb_ot_var_has_data (hb_face)) return FALSE; coords = hb_font_get_var_coords_normalized (hb_font, &n_coords); n_axes = hb_ot_var_get_axis_count (hb_face); axes = g_new0 (hb_ot_var_axis_info_t, n_axes); hb_ot_var_get_axis_infos (hb_face, 0, &n_axes, axes); for (i = 0; i < n_axes; i++) { float value; if (coords && i < n_coords) value = denorm_coord (&axes[i], coords[i]); else value = axes[i].default_value; if (add_axis (fontchooser, hb_font, &axes[i], value, i + 4)) has_axis = TRUE; } g_free (axes); g_object_unref (pango_font); return has_axis; } /* OpenType features */ /* look for a lang / script combination that matches the * language property and is supported by the hb_face. If * none is found, return the default lang / script tags. */ static void find_language_and_script (GtkFontChooserWidget *fontchooser, hb_face_t *hb_face, hb_tag_t *lang_tag, hb_tag_t *script_tag) { int i, j, k; hb_tag_t scripts[80]; unsigned int n_scripts; unsigned int count; hb_tag_t table[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS }; hb_language_t lang; const char *langname, *p; langname = pango_language_to_string (fontchooser->language); p = strchr (langname, '-'); lang = hb_language_from_string (langname, p ? p - langname : -1); n_scripts = 0; for (i = 0; i < 2; i++) { count = G_N_ELEMENTS (scripts); hb_ot_layout_table_get_script_tags (hb_face, table[i], n_scripts, &count, scripts); n_scripts += count; } for (j = 0; j < n_scripts; j++) { hb_tag_t languages[80]; unsigned int n_languages; n_languages = 0; for (i = 0; i < 2; i++) { count = G_N_ELEMENTS (languages); hb_ot_layout_script_get_language_tags (hb_face, table[i], j, n_languages, &count, languages); n_languages += count; } for (k = 0; k < n_languages; k++) { if (lang == hb_ot_tag_to_language (languages[k])) { *script_tag = scripts[j]; *lang_tag = languages[k]; return; } } } *lang_tag = HB_OT_TAG_DEFAULT_LANGUAGE; *script_tag = HB_OT_TAG_DEFAULT_SCRIPT; } typedef struct { hb_tag_t tag; const char *name; GtkWidget *top; GtkWidget *feat; GtkWidget *example; } FeatureItem; static const char * get_feature_display_name (hb_tag_t tag) { int i; for (i = 0; i < G_N_ELEMENTS (open_type_layout_features); i++) { if (tag == open_type_layout_features[i].tag) return g_dpgettext2 (NULL, "OpenType layout", open_type_layout_features[i].name); } return NULL; } static void set_inconsistent (GtkCheckButton *button, gboolean inconsistent) { gtk_check_button_set_inconsistent (GTK_CHECK_BUTTON (button), inconsistent); gtk_widget_set_opacity (gtk_widget_get_first_child (GTK_WIDGET (button)), inconsistent ? 0.0 : 1.0); } static void feat_pressed (GtkGestureClick *gesture, int n_press, double x, double y, GtkWidget *feat) { const guint button = gtk_gesture_single_get_current_button (GTK_GESTURE_SINGLE (gesture)); if (button == GDK_BUTTON_PRIMARY) { g_signal_handlers_block_by_func (feat, feat_pressed, NULL); if (gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (feat))) { set_inconsistent (GTK_CHECK_BUTTON (feat), FALSE); gtk_check_button_set_active (GTK_CHECK_BUTTON (feat), TRUE); } g_signal_handlers_unblock_by_func (feat, feat_pressed, NULL); } else if (button == GDK_BUTTON_SECONDARY) { gboolean inconsistent = gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (feat)); set_inconsistent (GTK_CHECK_BUTTON (feat), !inconsistent); } } static char * find_affected_text (GtkFontChooserWidget *fontchooser, hb_tag_t feature_tag, hb_font_t *hb_font, hb_tag_t script_tag, hb_tag_t lang_tag, int max_chars) { hb_face_t *hb_face; unsigned int script_index = 0; unsigned int lang_index = 0; unsigned int feature_index = 0; GString *chars; hb_face = hb_font_get_face (hb_font); chars = g_string_new (""); hb_ot_layout_table_find_script (hb_face, HB_OT_TAG_GSUB, script_tag, &script_index); G_GNUC_BEGIN_IGNORE_DEPRECATIONS hb_ot_layout_script_find_language (hb_face, HB_OT_TAG_GSUB, script_index, lang_tag, &lang_index); G_GNUC_END_IGNORE_DEPRECATIONS if (hb_ot_layout_language_find_feature (hb_face, HB_OT_TAG_GSUB, script_index, lang_index, feature_tag, &feature_index)) { unsigned int lookup_indexes[32]; unsigned int lookup_count = 32; int count; int n_chars = 0; count = hb_ot_layout_feature_get_lookups (hb_face, HB_OT_TAG_GSUB, feature_index, 0, &lookup_count, lookup_indexes); if (count > 0) { hb_set_t* glyphs_before = NULL; hb_set_t* glyphs_input = NULL; hb_set_t* glyphs_after = NULL; hb_set_t* glyphs_output = NULL; hb_codepoint_t gid; glyphs_input = hb_set_create (); // XXX For now, just look at first index hb_ot_layout_lookup_collect_glyphs (hb_face, HB_OT_TAG_GSUB, lookup_indexes[0], glyphs_before, glyphs_input, glyphs_after, glyphs_output); if (!fontchooser->glyphmap) { fontchooser->glyphmap = hb_map_create (); for (hb_codepoint_t ch = 0; ch < 0xffff; ch++) { hb_codepoint_t glyph = 0; if (hb_font_get_nominal_glyph (hb_font, ch, &glyph) && !hb_map_has (fontchooser->glyphmap, glyph)) hb_map_set (fontchooser->glyphmap, glyph, ch); } } while (hb_set_next (glyphs_input, &gid)) { hb_codepoint_t ch; if (n_chars == max_chars) { g_string_append (chars, "…"); break; } ch = hb_map_get (fontchooser->glyphmap, gid); if (ch != HB_MAP_VALUE_INVALID) { g_string_append_unichar (chars, (gunichar)ch); n_chars++; } } hb_set_destroy (glyphs_input); } } return g_string_free (chars, FALSE); } static void update_feature_example (GtkFontChooserWidget *fontchooser, FeatureItem *item, hb_font_t *hb_font, hb_tag_t script_tag, hb_tag_t lang_tag, PangoFontDescription *font_desc) { const char *letter_case[] = { "smcp", "c2sc", "pcap", "c2pc", "unic", "cpsp", "case", NULL }; const char *number_case[] = { "xxxx", "lnum", "onum", NULL }; const char *number_spacing[] = { "xxxx", "pnum", "tnum", NULL }; const char *number_formatting[] = { "zero", "nalt", "frac", NULL }; const char *char_variants[] = { "swsh", "cswh", "calt", "falt", "hist", "salt", "jalt", "titl", "rand", "ss01", "ss02", "ss03", "ss04", "ss05", "ss06", "ss07", "ss08", "ss09", "ss10", "ss11", "ss12", "ss13", "ss14", "ss15", "ss16", "ss17", "ss18", "ss19", "ss20", NULL }; if (g_strv_contains (number_case, item->name) || g_strv_contains (number_spacing, item->name)) { PangoAttrList *attrs; PangoAttribute *attr; PangoFontDescription *desc; char *str; attrs = pango_attr_list_new (); desc = pango_font_description_copy (font_desc); pango_font_description_unset_fields (desc, PANGO_FONT_MASK_SIZE); pango_attr_list_insert (attrs, pango_attr_font_desc_new (desc)); pango_font_description_free (desc); str = g_strconcat (item->name, " 1", NULL); attr = pango_attr_font_features_new (str); pango_attr_list_insert (attrs, attr); gtk_label_set_text (GTK_LABEL (item->example), "0123456789"); gtk_label_set_attributes (GTK_LABEL (item->example), attrs); pango_attr_list_unref (attrs); } else if (g_strv_contains (letter_case, item->name) || g_strv_contains (number_formatting, item->name) || g_strv_contains (char_variants, item->name)) { char *input = NULL; char *text; if (strcmp (item->name, "case") == 0) input = g_strdup ("A-B[Cq]"); else if (g_strv_contains (letter_case, item->name)) input = g_strdup ("AaBbCc…"); else if (strcmp (item->name, "zero") == 0) input = g_strdup ("0"); else if (strcmp (item->name, "frac") == 0) input = g_strdup ("1/2 2/3 7/8"); else if (strcmp (item->name, "nalt") == 0) input = find_affected_text (fontchooser, item->tag, hb_font, script_tag, lang_tag, 3); else input = find_affected_text (fontchooser, item->tag, hb_font, script_tag, lang_tag, 10); if (input[0] != '\0') { PangoAttrList *attrs; PangoAttribute *attr; PangoFontDescription *desc; char *str; text = g_strconcat (input, " ⟶ ", input, NULL); attrs = pango_attr_list_new (); desc = pango_font_description_copy (font_desc); pango_font_description_unset_fields (desc, PANGO_FONT_MASK_SIZE); pango_attr_list_insert (attrs, pango_attr_font_desc_new (desc)); pango_font_description_free (desc); str = g_strconcat (item->name, " 0", NULL); attr = pango_attr_font_features_new (str); attr->start_index = 0; attr->end_index = strlen (input); pango_attr_list_insert (attrs, attr); str = g_strconcat (item->name, " 1", NULL); attr = pango_attr_font_features_new (str); attr->start_index = strlen (input) + strlen (" ⟶ "); attr->end_index = attr->start_index + strlen (input); pango_attr_list_insert (attrs, attr); gtk_label_set_text (GTK_LABEL (item->example), text); gtk_label_set_attributes (GTK_LABEL (item->example), attrs); g_free (text); pango_attr_list_unref (attrs); } else gtk_label_set_markup (GTK_LABEL (item->example), ""); g_free (input); } } static void font_feature_toggled_cb (GtkCheckButton *check_button, gpointer user_data) { GtkFontChooserWidget *fontchooser = user_data; set_inconsistent (check_button, FALSE); update_font_features (fontchooser); } static void add_check_group (GtkFontChooserWidget *fontchooser, const char *title, const char **tags) { GtkWidget *label; GtkWidget *group; PangoAttrList *attrs; int i; group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0); gtk_widget_set_halign (group, GTK_ALIGN_FILL); label = gtk_label_new (title); gtk_label_set_xalign (GTK_LABEL (label), 0.0); gtk_widget_set_halign (label, GTK_ALIGN_START); g_object_set (label, "margin-top", 10, "margin-bottom", 10, NULL); attrs = pango_attr_list_new (); pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD)); gtk_label_set_attributes (GTK_LABEL (label), attrs); pango_attr_list_unref (attrs); gtk_box_append (GTK_BOX (group), label); for (i = 0; tags[i]; i++) { hb_tag_t tag; GtkWidget *feat; FeatureItem *item; GtkGesture *gesture; GtkWidget *box; GtkWidget *example; tag = hb_tag_from_string (tags[i], -1); feat = gtk_check_button_new_with_label (get_feature_display_name (tag)); set_inconsistent (GTK_CHECK_BUTTON (feat), TRUE); g_signal_connect (feat, "toggled", G_CALLBACK (font_feature_toggled_cb), fontchooser); g_signal_connect_swapped (feat, "notify::inconsistent", G_CALLBACK (update_font_features), fontchooser); gesture = gtk_gesture_click_new (); gtk_gesture_single_set_button (GTK_GESTURE_SINGLE (gesture), GDK_BUTTON_SECONDARY); g_signal_connect (gesture, "pressed", G_CALLBACK (feat_pressed), feat); gtk_widget_add_controller (feat, GTK_EVENT_CONTROLLER (gesture)); example = gtk_label_new (""); gtk_label_set_selectable (GTK_LABEL (example), TRUE); gtk_widget_set_halign (example, GTK_ALIGN_START); box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10); gtk_box_set_homogeneous (GTK_BOX (box), TRUE); gtk_box_append (GTK_BOX (box), feat); gtk_box_append (GTK_BOX (box), example); gtk_box_append (GTK_BOX (group), box); item = g_new (FeatureItem, 1); item->name = tags[i]; item->tag = tag; item->top = box; item->feat = feat; item->example = example; fontchooser->feature_items = g_list_prepend (fontchooser->feature_items, item); } gtk_box_append (GTK_BOX (fontchooser->feature_box), group); } static void add_radio_group (GtkFontChooserWidget *fontchooser, const char *title, const char **tags) { GtkWidget *label; GtkWidget *group; int i; GtkWidget *group_button = NULL; PangoAttrList *attrs; group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0); gtk_widget_set_halign (group, GTK_ALIGN_FILL); label = gtk_label_new (title); gtk_label_set_xalign (GTK_LABEL (label), 0.0); gtk_widget_set_halign (label, GTK_ALIGN_START); g_object_set (label, "margin-top", 10, "margin-bottom", 10, NULL); attrs = pango_attr_list_new (); pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD)); gtk_label_set_attributes (GTK_LABEL (label), attrs); pango_attr_list_unref (attrs); gtk_box_append (GTK_BOX (group), label); for (i = 0; tags[i]; i++) { hb_tag_t tag; GtkWidget *feat; FeatureItem *item; const char *name; GtkWidget *box; GtkWidget *example; tag = hb_tag_from_string (tags[i], -1); name = get_feature_display_name (tag); feat = gtk_check_button_new_with_label (name ? name : _("Default")); if (group_button == NULL) group_button = feat; else gtk_check_button_set_group (GTK_CHECK_BUTTON (feat), GTK_CHECK_BUTTON (group_button)); g_signal_connect_swapped (feat, "notify::active", G_CALLBACK (update_font_features), fontchooser); g_object_set_data (G_OBJECT (feat), "default", group_button); example = gtk_label_new (""); gtk_label_set_selectable (GTK_LABEL (example), TRUE); gtk_widget_set_halign (example, GTK_ALIGN_START); box = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 10); gtk_box_set_homogeneous (GTK_BOX (box), TRUE); gtk_box_append (GTK_BOX (box), feat); gtk_box_append (GTK_BOX (box), example); gtk_box_append (GTK_BOX (group), box); item = g_new (FeatureItem, 1); item->name = tags[i]; item->tag = tag; item->top = box; item->feat = feat; item->example = example; fontchooser->feature_items = g_list_prepend (fontchooser->feature_items, item); } gtk_box_append (GTK_BOX (fontchooser->feature_box), group); } static void gtk_font_chooser_widget_populate_features (GtkFontChooserWidget *fontchooser) { const char *ligatures[] = { "liga", "dlig", "hlig", "clig", NULL }; const char *letter_case[] = { "smcp", "c2sc", "pcap", "c2pc", "unic", "cpsp", "case", NULL }; const char *number_case[] = { "xxxx", "lnum", "onum", NULL }; const char *number_spacing[] = { "xxxx", "pnum", "tnum", NULL }; const char *number_formatting[] = { "zero", "nalt", "frac", NULL }; const char *char_variants[] = { "swsh", "cswh", "calt", "falt", "hist", "salt", "jalt", "titl", "rand", "ss01", "ss02", "ss03", "ss04", "ss05", "ss06", "ss07", "ss08", "ss09", "ss10", "ss11", "ss12", "ss13", "ss14", "ss15", "ss16", "ss17", "ss18", "ss19", "ss20", NULL }; add_check_group (fontchooser, _("Ligatures"), ligatures); add_check_group (fontchooser, _("Letter Case"), letter_case); add_radio_group (fontchooser, _("Number Case"), number_case); add_radio_group (fontchooser, _("Number Spacing"), number_spacing); add_check_group (fontchooser, _("Number Formatting"), number_formatting); add_check_group (fontchooser, _("Character Variants"), char_variants); update_font_features (fontchooser); } static gboolean gtk_font_chooser_widget_update_font_features (GtkFontChooserWidget *fontchooser) { PangoFont *pango_font; hb_font_t *hb_font; hb_tag_t script_tag; hb_tag_t lang_tag; guint script_index = 0; guint lang_index = 0; int i, j; GList *l; gboolean has_feature = FALSE; for (l = fontchooser->feature_items; l; l = l->next) { FeatureItem *item = l->data; gtk_widget_hide (item->top); gtk_widget_hide (gtk_widget_get_parent (item->top)); } if ((fontchooser->level & GTK_FONT_CHOOSER_LEVEL_FEATURES) == 0) return FALSE; pango_font = pango_context_load_font (gtk_widget_get_pango_context (GTK_WIDGET (fontchooser)), fontchooser->font_desc); hb_font = pango_font_get_hb_font (pango_font); if (hb_font) { hb_tag_t table[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS }; hb_face_t *hb_face; hb_tag_t features[80]; unsigned int count; unsigned int n_features; hb_face = hb_font_get_face (hb_font); find_language_and_script (fontchooser, hb_face, &lang_tag, &script_tag); n_features = 0; for (i = 0; i < 2; i++) { hb_ot_layout_table_find_script (hb_face, table[i], script_tag, &script_index); G_GNUC_BEGIN_IGNORE_DEPRECATIONS hb_ot_layout_script_find_language (hb_face, table[i], script_index, lang_tag, &lang_index); G_GNUC_END_IGNORE_DEPRECATIONS count = G_N_ELEMENTS (features); hb_ot_layout_language_get_feature_tags (hb_face, table[i], script_index, lang_index, n_features, &count, features); n_features += count; } for (j = 0; j < n_features; j++) { for (l = fontchooser->feature_items; l; l = l->next) { FeatureItem *item = l->data; if (item->tag != features[j]) continue; has_feature = TRUE; gtk_widget_show (item->top); gtk_widget_show (gtk_widget_get_parent (item->top)); update_feature_example (fontchooser, item, hb_font, script_tag, lang_tag, fontchooser->font_desc); if (GTK_IS_CHECK_BUTTON (item->feat)) { GtkWidget *def = GTK_WIDGET (g_object_get_data (G_OBJECT (item->feat), "default")); if (def) { gtk_widget_show (def); gtk_widget_show (gtk_widget_get_parent (def)); gtk_check_button_set_active (GTK_CHECK_BUTTON (def), TRUE); } else set_inconsistent (GTK_CHECK_BUTTON (item->feat), TRUE); } } } if (fontchooser->glyphmap) { hb_map_destroy (fontchooser->glyphmap); fontchooser->glyphmap = NULL; } } g_object_unref (pango_font); return has_feature; } static void update_font_features (GtkFontChooserWidget *fontchooser) { GString *s; GList *l; s = g_string_new (""); for (l = fontchooser->feature_items; l; l = l->next) { FeatureItem *item = l->data; if (!gtk_widget_is_sensitive (item->feat)) continue; if (GTK_IS_CHECK_BUTTON (item->feat) && g_object_get_data (G_OBJECT (item->feat), "default")) { if (gtk_check_button_get_active (GTK_CHECK_BUTTON (item->feat)) && strcmp (item->name, "xxxx") != 0) { g_string_append_printf (s, "%s\"%s\" %d", s->len > 0 ? ", " : "", item->name, 1); } } else if (GTK_IS_CHECK_BUTTON (item->feat)) { if (gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (item->feat))) continue; g_string_append_printf (s, "%s\"%s\" %d", s->len > 0 ? ", " : "", item->name, gtk_check_button_get_active (GTK_CHECK_BUTTON (item->feat))); } } if (g_strcmp0 (fontchooser->font_features, s->str) != 0) { g_free (fontchooser->font_features); fontchooser->font_features = g_string_free (s, FALSE); g_object_notify (G_OBJECT (fontchooser), "font-features"); } else g_string_free (s, TRUE); gtk_font_chooser_widget_update_preview_attributes (fontchooser); } static void gtk_font_chooser_widget_merge_font_desc (GtkFontChooserWidget *fontchooser, const PangoFontDescription *font_desc) { PangoFontMask mask; g_assert (font_desc != NULL); /* iter may be NULL if the font doesn't exist on the list */ mask = pango_font_description_get_set_fields (font_desc); /* sucky test, because we can't restrict the comparison to * only the parts that actually do get merged */ if (pango_font_description_equal (font_desc, fontchooser->font_desc)) return; pango_font_description_merge (fontchooser->font_desc, font_desc, TRUE); if (mask & PANGO_FONT_MASK_SIZE) { double font_size = (double) pango_font_description_get_size (fontchooser->font_desc) / PANGO_SCALE; /* XXX: This clamps, which can cause it to reloop into here, do we need * to block its signal handler? */ gtk_range_set_value (GTK_RANGE (fontchooser->size_slider), font_size); gtk_spin_button_set_value (GTK_SPIN_BUTTON (fontchooser->size_spin), font_size); } if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT | PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH)) { gboolean has_tweak = FALSE; gtk_font_chooser_widget_update_marks (fontchooser); if (gtk_font_chooser_widget_update_font_features (fontchooser)) has_tweak = TRUE; if (gtk_font_chooser_widget_update_font_variations (fontchooser)) has_tweak = TRUE; g_simple_action_set_enabled (G_SIMPLE_ACTION (fontchooser->tweak_action), has_tweak); } if (mask & PANGO_FONT_MASK_VARIATIONS) { if (pango_font_description_get_variations (fontchooser->font_desc)[0] == '\0') pango_font_description_unset_fields (fontchooser->font_desc, PANGO_FONT_MASK_VARIANT); } gtk_font_chooser_widget_update_preview_attributes (fontchooser); g_object_notify (G_OBJECT (fontchooser), "font"); g_object_notify (G_OBJECT (fontchooser), "font-desc"); } static void gtk_font_chooser_widget_take_font_desc (GtkFontChooserWidget *fontchooser, PangoFontDescription *font_desc) { PangoFontMask mask; if (font_desc == NULL) font_desc = pango_font_description_from_string (GTK_FONT_CHOOSER_DEFAULT_FONT_NAME); mask = pango_font_description_get_set_fields (font_desc); gtk_font_chooser_widget_merge_font_desc (fontchooser, font_desc); if (mask & (PANGO_FONT_MASK_FAMILY | PANGO_FONT_MASK_STYLE | PANGO_FONT_MASK_VARIANT | PANGO_FONT_MASK_WEIGHT | PANGO_FONT_MASK_STRETCH)) { gtk_single_selection_set_selected (fontchooser->selection, GTK_INVALID_LIST_POSITION); gtk_font_chooser_widget_ensure_matching_selection (fontchooser); } pango_font_description_free (font_desc); } static const char * gtk_font_chooser_widget_get_preview_text (GtkFontChooserWidget *fontchooser) { return fontchooser->preview_text; } static void gtk_font_chooser_widget_set_preview_text (GtkFontChooserWidget *fontchooser, const char *text) { if (fontchooser->preview_text == text) return; g_free (fontchooser->preview_text); fontchooser->preview_text = g_strdup (text); gtk_editable_set_text (GTK_EDITABLE (fontchooser->preview), text); g_object_notify (G_OBJECT (fontchooser), "preview-text"); } static gboolean gtk_font_chooser_widget_get_show_preview_entry (GtkFontChooserWidget *fontchooser) { return fontchooser->show_preview_entry; } static void gtk_font_chooser_widget_set_show_preview_entry (GtkFontChooserWidget *fontchooser, gboolean show_preview_entry) { if (fontchooser->show_preview_entry != show_preview_entry) { fontchooser->show_preview_entry = show_preview_entry; if (show_preview_entry) gtk_widget_show (fontchooser->preview); else gtk_widget_hide (fontchooser->preview); g_object_notify (G_OBJECT (fontchooser), "show-preview-entry"); } } static void gtk_font_chooser_widget_set_font_map (GtkFontChooser *chooser, PangoFontMap *fontmap) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser); if (g_set_object (&fontchooser->font_map, fontmap)) { PangoContext *context; if (!fontmap) fontmap = pango_cairo_font_map_get_default (); context = gtk_widget_get_pango_context (fontchooser->family_face_list); pango_context_set_font_map (context, fontmap); context = gtk_widget_get_pango_context (fontchooser->preview); pango_context_set_font_map (context, fontmap); update_fontlist (fontchooser); } } static PangoFontMap * gtk_font_chooser_widget_get_font_map (GtkFontChooser *chooser) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (chooser); return fontchooser->font_map; } static gboolean gtk_font_chooser_widget_filter_cb (gpointer item, gpointer data) { GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (data); PangoFontFamily *family; PangoFontFace *face; if (PANGO_IS_FONT_FAMILY (item)) { family = item; face = pango_font_family_get_face (family, NULL); } else { face = item; family = pango_font_face_get_family (face); } return self->filter_func (family, face, self->filter_data); } static void gtk_font_chooser_widget_set_filter_func (GtkFontChooser *chooser, GtkFontFilterFunc filter, gpointer data, GDestroyNotify destroy) { GtkFontChooserWidget *self = GTK_FONT_CHOOSER_WIDGET (chooser); if (self->filter_data_destroy) self->filter_data_destroy (self->filter_data); self->filter_func = filter; self->filter_data = data; self->filter_data_destroy = destroy; if (filter) { gtk_custom_filter_set_filter_func (self->custom_filter, gtk_font_chooser_widget_filter_cb, self, NULL); } else { gtk_custom_filter_set_filter_func (self->custom_filter, NULL, NULL, NULL); } } static void gtk_font_chooser_widget_set_level (GtkFontChooserWidget *fontchooser, GtkFontChooserLevel level) { if (fontchooser->level == level) return; fontchooser->level = level; if ((level & GTK_FONT_CHOOSER_LEVEL_SIZE) != 0) { gtk_widget_show (fontchooser->size_label); gtk_widget_show (fontchooser->size_slider); gtk_widget_show (fontchooser->size_spin); } else { gtk_widget_hide (fontchooser->size_label); gtk_widget_hide (fontchooser->size_slider); gtk_widget_hide (fontchooser->size_spin); } update_fontlist (fontchooser); g_object_notify (G_OBJECT (fontchooser), "level"); } static GtkFontChooserLevel gtk_font_chooser_widget_get_level (GtkFontChooserWidget *fontchooser) { return fontchooser->level; } static void gtk_font_chooser_widget_set_language (GtkFontChooserWidget *fontchooser, const char *language) { PangoLanguage *lang; lang = pango_language_from_string (language); if (fontchooser->language == lang) return; fontchooser->language = lang; g_object_notify (G_OBJECT (fontchooser), "language"); gtk_font_chooser_widget_update_preview_attributes (fontchooser); } static void gtk_font_chooser_widget_iface_init (GtkFontChooserIface *iface) { iface->get_font_family = gtk_font_chooser_widget_get_family; iface->get_font_face = gtk_font_chooser_widget_get_face; iface->get_font_size = gtk_font_chooser_widget_get_size; iface->set_filter_func = gtk_font_chooser_widget_set_filter_func; iface->set_font_map = gtk_font_chooser_widget_set_font_map; iface->get_font_map = gtk_font_chooser_widget_get_font_map; } GAction * gtk_font_chooser_widget_get_tweak_action (GtkWidget *widget) { GtkFontChooserWidget *fontchooser = GTK_FONT_CHOOSER_WIDGET (widget); return fontchooser->tweak_action; }