forked from AuroraMiddleware/gtk
1351 lines
41 KiB
C
1351 lines
41 KiB
C
/* Pango/Font Explorer
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*
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* This example demonstrates support for OpenType font features with
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* Pango attributes. The attributes can be used manually or via Pango
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* markup.
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*
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* It can also be used to explore available features in OpenType fonts
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* and their effect.
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*
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* If the selected font supports OpenType font variations, then the
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* axes are also offered for customization.
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*/
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#include <gtk/gtk.h>
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#include <pango/pangofc-font.h>
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#include <hb.h>
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#include <hb-ot.h>
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#include <glib/gi18n.h>
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#include "open-type-layout.h"
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#include "fontplane.h"
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#include "script-names.h"
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#include "language-names.h"
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#define MAKE_TAG(a,b,c,d) (unsigned int)(((a) << 24) | ((b) << 16) | ((c) << 8) | (d))
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static GtkWidget *the_label;
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static GtkWidget *settings;
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static GtkWidget *description;
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static GtkWidget *font;
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static GtkWidget *script_lang;
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static GtkWidget *resetbutton;
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static GtkWidget *stack;
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static GtkWidget *the_entry;
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static GtkWidget *variations_heading;
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static GtkWidget *variations_grid;
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static GtkWidget *instance_combo;
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static GtkWidget *edit_toggle;
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typedef struct {
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unsigned int tag;
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const char *name;
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GtkWidget *icon;
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GtkWidget *dflt;
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GtkWidget *feat;
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} FeatureItem;
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static GList *feature_items;
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typedef struct {
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unsigned int start;
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unsigned int end;
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PangoFontDescription *desc;
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char *features;
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PangoLanguage *language;
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} Range;
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static GList *ranges;
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static void add_font_variations (GString *s);
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static void
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free_range (gpointer data)
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{
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Range *range = data;
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if (range->desc)
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pango_font_description_free (range->desc);
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g_free (range->features);
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g_free (range);
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}
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static int
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compare_range (gconstpointer a, gconstpointer b)
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{
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const Range *ra = a;
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const Range *rb = b;
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if (ra->start < rb->start)
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return -1;
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else if (ra->start > rb->start)
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return 1;
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else if (ra->end < rb->end)
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return 1;
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else if (ra->end > rb->end)
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return -1;
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return 0;
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}
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static void
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ensure_range (unsigned int start,
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unsigned int end,
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PangoFontDescription *desc,
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const char *features,
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PangoLanguage *language)
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{
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GList *l;
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Range *range;
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for (l = ranges; l; l = l->next)
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{
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Range *r = l->data;
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if (r->start == start && r->end == end)
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{
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range = r;
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goto set;
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}
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}
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range = g_new0 (Range, 1);
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range->start = start;
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range->end = end;
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ranges = g_list_insert_sorted (ranges, range, compare_range);
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set:
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if (range->desc)
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pango_font_description_free (range->desc);
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if (desc)
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range->desc = pango_font_description_copy (desc);
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g_free (range->features);
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range->features = g_strdup (features);
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range->language = language;
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}
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static const char *
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get_feature_display_name (unsigned int tag)
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{
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int i;
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for (i = 0; i < G_N_ELEMENTS (open_type_layout_features); i++)
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{
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if (tag == open_type_layout_features[i].tag)
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return g_dpgettext2 (NULL, "OpenType layout", open_type_layout_features[i].name);
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}
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return NULL;
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}
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static void update_display (void);
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static void
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set_inconsistent (GtkCheckButton *button,
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gboolean inconsistent)
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{
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gtk_check_button_set_inconsistent (GTK_CHECK_BUTTON (button), inconsistent);
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gtk_widget_set_opacity (gtk_widget_get_first_child (GTK_WIDGET (button)), inconsistent ? 0.0 : 1.0);
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}
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static void
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feat_clicked (GtkWidget *feat,
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gpointer data)
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{
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g_signal_handlers_block_by_func (feat, feat_clicked, NULL);
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if (gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (feat)))
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{
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set_inconsistent (GTK_CHECK_BUTTON (feat), FALSE);
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (feat), TRUE);
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}
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else if (!gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (feat)))
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{
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (feat), FALSE);
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}
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else
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{
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set_inconsistent (GTK_CHECK_BUTTON (feat), TRUE);
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}
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g_signal_handlers_unblock_by_func (feat, feat_clicked, NULL);
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}
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static void
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add_check_group (GtkWidget *box,
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const char *title,
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const char **tags)
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{
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GtkWidget *label;
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GtkWidget *group;
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PangoAttrList *attrs;
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int i;
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group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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gtk_widget_set_halign (group, GTK_ALIGN_START);
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label = gtk_label_new (title);
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gtk_label_set_xalign (GTK_LABEL (label), 0.0);
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gtk_widget_set_halign (label, GTK_ALIGN_START);
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g_object_set (label, "margin-top", 10, "margin-bottom", 10, NULL);
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attrs = pango_attr_list_new ();
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pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD));
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gtk_label_set_attributes (GTK_LABEL (label), attrs);
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pango_attr_list_unref (attrs);
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gtk_container_add (GTK_CONTAINER (group), label);
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for (i = 0; tags[i]; i++)
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{
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unsigned int tag;
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GtkWidget *feat;
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FeatureItem *item;
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tag = hb_tag_from_string (tags[i], -1);
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feat = gtk_check_button_new_with_label (get_feature_display_name (tag));
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set_inconsistent (GTK_CHECK_BUTTON (feat), TRUE);
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g_signal_connect (feat, "notify::active", G_CALLBACK (update_display), NULL);
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g_signal_connect (feat, "notify::inconsistent", G_CALLBACK (update_display), NULL);
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g_signal_connect (feat, "clicked", G_CALLBACK (feat_clicked), NULL);
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gtk_container_add (GTK_CONTAINER (group), feat);
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item = g_new (FeatureItem, 1);
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item->name = tags[i];
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item->tag = tag;
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item->icon = NULL;
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item->dflt = NULL;
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item->feat = feat;
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feature_items = g_list_prepend (feature_items, item);
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}
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gtk_container_add (GTK_CONTAINER (box), group);
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}
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static void
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add_radio_group (GtkWidget *box,
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const char *title,
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const char **tags)
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{
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GtkWidget *label;
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GtkWidget *group;
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int i;
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GtkWidget *group_button = NULL;
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PangoAttrList *attrs;
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group = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
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gtk_widget_set_halign (group, GTK_ALIGN_START);
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label = gtk_label_new (title);
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gtk_label_set_xalign (GTK_LABEL (label), 0.0);
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gtk_widget_set_halign (label, GTK_ALIGN_START);
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g_object_set (label, "margin-top", 10, "margin-bottom", 10, NULL);
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attrs = pango_attr_list_new ();
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pango_attr_list_insert (attrs, pango_attr_weight_new (PANGO_WEIGHT_BOLD));
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gtk_label_set_attributes (GTK_LABEL (label), attrs);
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pango_attr_list_unref (attrs);
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gtk_container_add (GTK_CONTAINER (group), label);
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for (i = 0; tags[i]; i++)
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{
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unsigned int tag;
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GtkWidget *feat;
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FeatureItem *item;
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const char *name;
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tag = hb_tag_from_string (tags[i], -1);
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name = get_feature_display_name (tag);
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feat = gtk_radio_button_new_with_label_from_widget (GTK_RADIO_BUTTON (group_button),
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name ? name : _("Default"));
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if (group_button == NULL)
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group_button = feat;
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g_signal_connect (feat, "notify::active", G_CALLBACK (update_display), NULL);
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g_object_set_data (G_OBJECT (feat), "default", group_button);
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gtk_container_add (GTK_CONTAINER (group), feat);
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item = g_new (FeatureItem, 1);
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item->name = tags[i];
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item->tag = tag;
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item->icon = NULL;
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item->dflt = NULL;
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item->feat = feat;
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feature_items = g_list_prepend (feature_items, item);
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}
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gtk_container_add (GTK_CONTAINER (box), group);
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}
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static void
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update_display (void)
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{
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GString *s;
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const char *text;
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gboolean has_feature;
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GtkTreeIter iter;
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GtkTreeModel *model;
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PangoFontDescription *desc;
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GList *l;
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PangoAttrList *attrs;
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PangoAttribute *attr;
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gint ins, bound;
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guint start, end;
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PangoLanguage *lang;
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char *font_desc;
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char *features;
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text = gtk_editable_get_text (GTK_EDITABLE (the_entry));
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if (gtk_label_get_selection_bounds (GTK_LABEL (the_label), &ins, &bound))
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{
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start = g_utf8_offset_to_pointer (text, ins) - text;
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end = g_utf8_offset_to_pointer (text, bound) - text;
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}
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else
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{
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start = PANGO_ATTR_INDEX_FROM_TEXT_BEGINNING;
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end = PANGO_ATTR_INDEX_TO_TEXT_END;
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}
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desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (font));
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s = g_string_new ("");
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add_font_variations (s);
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if (s->len > 0)
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{
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pango_font_description_set_variations (desc, s->str);
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g_string_free (s, TRUE);
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}
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font_desc = pango_font_description_to_string (desc);
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s = g_string_new ("");
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has_feature = FALSE;
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for (l = feature_items; l; l = l->next)
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{
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FeatureItem *item = l->data;
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if (!gtk_widget_is_sensitive (item->feat))
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continue;
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if (GTK_IS_RADIO_BUTTON (item->feat))
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{
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (item->feat)) &&
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strcmp (item->name, "xxxx") != 0)
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{
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if (has_feature)
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g_string_append (s, ", ");
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g_string_append (s, item->name);
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g_string_append (s, " 1");
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has_feature = TRUE;
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}
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}
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else if (GTK_IS_CHECK_BUTTON (item->feat))
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{
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if (gtk_check_button_get_inconsistent (GTK_CHECK_BUTTON (item->feat)))
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continue;
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if (has_feature)
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g_string_append (s, ", ");
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g_string_append (s, item->name);
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (item->feat)))
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g_string_append (s, " 1");
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else
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g_string_append (s, " 0");
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has_feature = TRUE;
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}
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}
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features = g_string_free (s, FALSE);
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if (gtk_combo_box_get_active_iter (GTK_COMBO_BOX (script_lang), &iter))
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{
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hb_tag_t lang_tag;
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model = gtk_combo_box_get_model (GTK_COMBO_BOX (script_lang));
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gtk_tree_model_get (model, &iter,
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3, &lang_tag,
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-1);
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lang = pango_language_from_string (hb_language_to_string (hb_ot_tag_to_language (lang_tag)));
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}
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else
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lang = NULL;
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ensure_range (start, end, desc, features, lang);
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attrs = pango_attr_list_new ();
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for (l = ranges; l; l = l->next)
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{
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Range *range = l->data;
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attr = pango_attr_font_desc_new (range->desc);
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attr->start_index = range->start;
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attr->end_index = range->end;
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pango_attr_list_insert (attrs, attr);
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attr = pango_attr_font_features_new (range->features);
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attr->start_index = range->start;
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attr->end_index = range->end;
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pango_attr_list_insert (attrs, attr);
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if (range->language)
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{
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attr = pango_attr_language_new (range->language);
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attr->start_index = range->start;
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attr->end_index = range->end;
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pango_attr_list_insert (attrs, attr);
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}
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}
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gtk_label_set_text (GTK_LABEL (description), font_desc);
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gtk_label_set_text (GTK_LABEL (settings), features);
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gtk_label_set_text (GTK_LABEL (the_label), text);
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gtk_label_set_attributes (GTK_LABEL (the_label), attrs);
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g_free (font_desc);
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pango_font_description_free (desc);
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g_free (features);
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pango_attr_list_unref (attrs);
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}
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static PangoFont *
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get_pango_font (void)
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{
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PangoFontDescription *desc;
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PangoContext *context;
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desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (font));
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context = gtk_widget_get_pango_context (font);
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return pango_context_load_font (context, desc);
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}
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typedef struct {
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hb_tag_t script_tag;
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hb_tag_t lang_tag;
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unsigned int script_index;
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unsigned int lang_index;
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} TagPair;
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static guint
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tag_pair_hash (gconstpointer data)
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{
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const TagPair *pair = data;
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return pair->script_tag + pair->lang_tag;
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}
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static gboolean
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tag_pair_equal (gconstpointer a, gconstpointer b)
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{
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const TagPair *pair_a = a;
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const TagPair *pair_b = b;
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return pair_a->script_tag == pair_b->script_tag && pair_a->lang_tag == pair_b->lang_tag;
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}
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static int
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script_sort_func (GtkTreeModel *model,
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GtkTreeIter *a,
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GtkTreeIter *b,
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gpointer user_data)
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{
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char *sa, *sb;
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int ret;
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gtk_tree_model_get (model, a, 0, &sa, -1);
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gtk_tree_model_get (model, b, 0, &sb, -1);
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ret = strcmp (sa, sb);
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g_free (sa);
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g_free (sb);
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return ret;
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}
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static void
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update_script_combo (void)
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{
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GtkListStore *store;
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hb_font_t *hb_font;
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gint i, j, k;
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PangoFont *pango_font;
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GHashTable *tags;
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GHashTableIter iter;
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TagPair *pair;
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char *lang;
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hb_tag_t active;
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GtkTreeIter active_iter;
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gboolean have_active = FALSE;
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lang = gtk_font_chooser_get_language (GTK_FONT_CHOOSER (font));
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G_GNUC_BEGIN_IGNORE_DEPRECATIONS
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active = hb_ot_tag_from_language (hb_language_from_string (lang, -1));
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G_GNUC_END_IGNORE_DEPRECATIONS
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g_free (lang);
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store = gtk_list_store_new (4, G_TYPE_STRING, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
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pango_font = get_pango_font ();
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hb_font = pango_font_get_hb_font (pango_font);
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tags = g_hash_table_new_full (tag_pair_hash, tag_pair_equal, g_free, NULL);
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pair = g_new (TagPair, 1);
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pair->script_tag = HB_OT_TAG_DEFAULT_SCRIPT;
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pair->lang_tag = HB_OT_TAG_DEFAULT_LANGUAGE;
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g_hash_table_add (tags, pair);
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if (hb_font)
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{
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hb_tag_t tables[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS };
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hb_face_t *hb_face;
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hb_face = hb_font_get_face (hb_font);
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for (i= 0; i < 2; i++)
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{
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hb_tag_t scripts[80];
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unsigned int script_count = G_N_ELEMENTS (scripts);
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hb_ot_layout_table_get_script_tags (hb_face, tables[i], 0, &script_count, scripts);
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for (j = 0; j < script_count; j++)
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{
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hb_tag_t languages[80];
|
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unsigned int language_count = G_N_ELEMENTS (languages);
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|
hb_ot_layout_script_get_language_tags (hb_face, tables[i], j, 0, &language_count, languages);
|
|
for (k = 0; k < language_count; k++)
|
|
{
|
|
pair = g_new (TagPair, 1);
|
|
pair->script_tag = scripts[j];
|
|
pair->lang_tag = languages[k];
|
|
pair->script_index = j;
|
|
pair->lang_index = k;
|
|
g_hash_table_add (tags, pair);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
g_object_unref (pango_font);
|
|
|
|
g_hash_table_iter_init (&iter, tags);
|
|
while (g_hash_table_iter_next (&iter, (gpointer *)&pair, NULL))
|
|
{
|
|
const char *langname;
|
|
char langbuf[5];
|
|
GtkTreeIter tree_iter;
|
|
|
|
if (pair->lang_tag == HB_OT_TAG_DEFAULT_LANGUAGE)
|
|
langname = NC_("Language", "Default");
|
|
else
|
|
{
|
|
langname = get_language_name_for_tag (pair->lang_tag);
|
|
if (!langname)
|
|
{
|
|
hb_tag_to_string (pair->lang_tag, langbuf);
|
|
langbuf[4] = 0;
|
|
langname = langbuf;
|
|
}
|
|
}
|
|
|
|
gtk_list_store_insert_with_values (store, &tree_iter, -1,
|
|
0, langname,
|
|
1, pair->script_index,
|
|
2, pair->lang_index,
|
|
3, pair->lang_tag,
|
|
-1);
|
|
if (pair->lang_tag == active)
|
|
{
|
|
have_active = TRUE;
|
|
active_iter = tree_iter;
|
|
}
|
|
}
|
|
|
|
g_hash_table_destroy (tags);
|
|
|
|
gtk_tree_sortable_set_default_sort_func (GTK_TREE_SORTABLE (store),
|
|
script_sort_func, NULL, NULL);
|
|
gtk_tree_sortable_set_sort_column_id (GTK_TREE_SORTABLE (store),
|
|
GTK_TREE_SORTABLE_DEFAULT_SORT_COLUMN_ID,
|
|
GTK_SORT_ASCENDING);
|
|
gtk_combo_box_set_model (GTK_COMBO_BOX (script_lang), GTK_TREE_MODEL (store));
|
|
if (have_active)
|
|
gtk_combo_box_set_active_iter (GTK_COMBO_BOX (script_lang), &active_iter);
|
|
else
|
|
gtk_combo_box_set_active_iter (GTK_COMBO_BOX (script_lang), 0);
|
|
}
|
|
|
|
static void
|
|
update_features (void)
|
|
{
|
|
gint i, j;
|
|
GtkTreeModel *model;
|
|
GtkTreeIter iter;
|
|
guint script_index, lang_index;
|
|
PangoFont *pango_font;
|
|
hb_font_t *hb_font;
|
|
GList *l;
|
|
|
|
for (l = feature_items; l; l = l->next)
|
|
{
|
|
FeatureItem *item = l->data;
|
|
gtk_widget_hide (item->feat);
|
|
gtk_widget_hide (gtk_widget_get_parent (item->feat));
|
|
if (strcmp (item->name, "xxxx") == 0)
|
|
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (item->feat), TRUE);
|
|
}
|
|
|
|
/* set feature presence checks from the font features */
|
|
|
|
if (!gtk_combo_box_get_active_iter (GTK_COMBO_BOX (script_lang), &iter))
|
|
return;
|
|
|
|
model = gtk_combo_box_get_model (GTK_COMBO_BOX (script_lang));
|
|
gtk_tree_model_get (model, &iter,
|
|
1, &script_index,
|
|
2, &lang_index,
|
|
-1);
|
|
|
|
pango_font = get_pango_font ();
|
|
hb_font = pango_font_get_hb_font (pango_font);
|
|
|
|
if (hb_font)
|
|
{
|
|
hb_tag_t tables[2] = { HB_OT_TAG_GSUB, HB_OT_TAG_GPOS };
|
|
hb_face_t *hb_face;
|
|
char *feat;
|
|
|
|
hb_face = hb_font_get_face (hb_font);
|
|
|
|
for (i = 0; i < 2; i++)
|
|
{
|
|
hb_tag_t features[80];
|
|
unsigned int count = G_N_ELEMENTS(features);
|
|
|
|
hb_ot_layout_language_get_feature_tags (hb_face,
|
|
tables[i],
|
|
script_index,
|
|
lang_index,
|
|
0,
|
|
&count,
|
|
features);
|
|
|
|
for (j = 0; j < count; j++)
|
|
{
|
|
#if 0
|
|
char buf[5];
|
|
hb_tag_to_string (features[j], buf);
|
|
buf[4] = 0;
|
|
g_print ("%s present in %s\n", buf, i == 0 ? "GSUB" : "GPOS");
|
|
#endif
|
|
for (l = feature_items; l; l = l->next)
|
|
{
|
|
FeatureItem *item = l->data;
|
|
|
|
if (item->tag == features[j])
|
|
{
|
|
gtk_widget_show (item->feat);
|
|
gtk_widget_show (gtk_widget_get_parent (item->feat));
|
|
if (GTK_IS_RADIO_BUTTON (item->feat))
|
|
{
|
|
GtkWidget *def = GTK_WIDGET (g_object_get_data (G_OBJECT (item->feat), "default"));
|
|
gtk_widget_show (def);
|
|
}
|
|
else if (GTK_IS_CHECK_BUTTON (item->feat))
|
|
{
|
|
set_inconsistent (GTK_CHECK_BUTTON (item->feat), TRUE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
feat = gtk_font_chooser_get_font_features (GTK_FONT_CHOOSER (font));
|
|
if (feat)
|
|
{
|
|
for (l = feature_items; l; l = l->next)
|
|
{
|
|
FeatureItem *item = l->data;
|
|
char buf[5];
|
|
char *p;
|
|
|
|
hb_tag_to_string (item->tag, buf);
|
|
buf[4] = 0;
|
|
|
|
p = strstr (feat, buf);
|
|
if (p)
|
|
{
|
|
if (GTK_IS_RADIO_BUTTON (item->feat))
|
|
{
|
|
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (item->feat), p[6] == '1');
|
|
}
|
|
else if (GTK_IS_CHECK_BUTTON (item->feat))
|
|
{
|
|
set_inconsistent (GTK_CHECK_BUTTON (item->feat), FALSE);
|
|
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (item->feat), p[6] == '1');
|
|
}
|
|
}
|
|
}
|
|
|
|
g_free (feat);
|
|
}
|
|
}
|
|
|
|
g_object_unref (pango_font);
|
|
}
|
|
|
|
#define FixedToFloat(f) (((float)(f))/65536.0)
|
|
|
|
static void
|
|
adjustment_changed (GtkAdjustment *adjustment,
|
|
GtkEntry *entry)
|
|
{
|
|
char *str;
|
|
|
|
str = g_strdup_printf ("%g", gtk_adjustment_get_value (adjustment));
|
|
gtk_editable_set_text (GTK_EDITABLE (entry), str);
|
|
g_free (str);
|
|
|
|
update_display ();
|
|
}
|
|
|
|
static void
|
|
entry_activated (GtkEntry *entry,
|
|
GtkAdjustment *adjustment)
|
|
{
|
|
gdouble value;
|
|
gchar *err = NULL;
|
|
|
|
value = g_strtod (gtk_editable_get_text (GTK_EDITABLE (entry)), &err);
|
|
if (err != NULL)
|
|
gtk_adjustment_set_value (adjustment, value);
|
|
}
|
|
|
|
static void unset_instance (GtkAdjustment *adjustment);
|
|
|
|
typedef struct {
|
|
guint32 tag;
|
|
GtkAdjustment *adjustment;
|
|
} Axis;
|
|
|
|
static GHashTable *axes;
|
|
|
|
static void
|
|
add_font_variations (GString *s)
|
|
{
|
|
GHashTableIter iter;
|
|
Axis *axis;
|
|
char buf[G_ASCII_DTOSTR_BUF_SIZE];
|
|
const char *sep = "";
|
|
|
|
g_hash_table_iter_init (&iter, axes);
|
|
while (g_hash_table_iter_next (&iter, (gpointer *)NULL, (gpointer *)&axis))
|
|
{
|
|
char tag[5];
|
|
double value;
|
|
|
|
hb_tag_to_string (axis->tag, tag);
|
|
tag[4] = '\0';
|
|
value = gtk_adjustment_get_value (axis->adjustment);
|
|
|
|
g_string_append_printf (s, "%s%s=%s", sep, tag, g_ascii_dtostr (buf, sizeof (buf), value));
|
|
sep = ",";
|
|
}
|
|
}
|
|
|
|
static guint
|
|
axes_hash (gconstpointer v)
|
|
{
|
|
const Axis *p = v;
|
|
|
|
return p->tag;
|
|
}
|
|
|
|
static gboolean
|
|
axes_equal (gconstpointer v1, gconstpointer v2)
|
|
{
|
|
const Axis *p1 = v1;
|
|
const Axis *p2 = v2;
|
|
|
|
return p1->tag == p2->tag;
|
|
}
|
|
|
|
static void
|
|
add_axis (hb_face_t *hb_face,
|
|
hb_ot_var_axis_info_t *ax,
|
|
float value,
|
|
int i)
|
|
{
|
|
GtkWidget *axis_label;
|
|
GtkWidget *axis_entry;
|
|
GtkWidget *axis_scale;
|
|
GtkAdjustment *adjustment;
|
|
Axis *axis;
|
|
char name[20];
|
|
unsigned int name_len = 20;
|
|
|
|
hb_ot_name_get_utf8 (hb_face, ax->name_id, HB_LANGUAGE_INVALID, &name_len, name);
|
|
|
|
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 (variations_grid), axis_label, 0, i, 1, 1);
|
|
adjustment = gtk_adjustment_new (value, ax->min_value, ax->max_value,
|
|
1.0, 10.0, 0.0);
|
|
axis_scale = gtk_scale_new (GTK_ORIENTATION_HORIZONTAL, adjustment);
|
|
gtk_scale_add_mark (GTK_SCALE (axis_scale), 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 (variations_grid), axis_scale, 1, i, 1, 1);
|
|
axis_entry = gtk_entry_new ();
|
|
gtk_widget_set_valign (axis_entry, GTK_ALIGN_BASELINE);
|
|
gtk_editable_set_width_chars (GTK_EDITABLE (axis_entry), 4);
|
|
gtk_grid_attach (GTK_GRID (variations_grid), axis_entry, 2, i, 1, 1);
|
|
|
|
axis = g_new (Axis, 1);
|
|
axis->tag = ax->tag;
|
|
axis->adjustment = adjustment;
|
|
g_hash_table_add (axes, axis);
|
|
|
|
adjustment_changed (adjustment, GTK_ENTRY (axis_entry));
|
|
|
|
g_signal_connect (adjustment, "value-changed", G_CALLBACK (adjustment_changed), axis_entry);
|
|
g_signal_connect (adjustment, "value-changed", G_CALLBACK (unset_instance), NULL);
|
|
g_signal_connect (axis_entry, "activate", G_CALLBACK (entry_activated), adjustment);
|
|
}
|
|
|
|
typedef struct {
|
|
char *name;
|
|
unsigned int index;
|
|
} Instance;
|
|
|
|
static guint
|
|
instance_hash (gconstpointer v)
|
|
{
|
|
const Instance *p = v;
|
|
|
|
return g_str_hash (p->name);
|
|
}
|
|
|
|
static gboolean
|
|
instance_equal (gconstpointer v1, gconstpointer v2)
|
|
{
|
|
const Instance *p1 = v1;
|
|
const Instance *p2 = v2;
|
|
|
|
return g_str_equal (p1->name, p2->name);
|
|
}
|
|
|
|
static void
|
|
free_instance (gpointer data)
|
|
{
|
|
Instance *instance = data;
|
|
|
|
g_free (instance->name);
|
|
g_free (instance);
|
|
}
|
|
|
|
static GHashTable *instances;
|
|
|
|
static void
|
|
add_instance (hb_face_t *face,
|
|
unsigned int index,
|
|
GtkWidget *combo,
|
|
int pos)
|
|
{
|
|
Instance *instance;
|
|
hb_ot_name_id_t name_id;
|
|
char name[20];
|
|
unsigned int name_len = 20;
|
|
|
|
instance = g_new0 (Instance, 1);
|
|
|
|
name_id = hb_ot_var_named_instance_get_subfamily_name_id (face, index);
|
|
hb_ot_name_get_utf8 (face, name_id, HB_LANGUAGE_INVALID, &name_len, name);
|
|
|
|
instance->name = g_strdup (name);
|
|
instance->index = index;
|
|
|
|
g_hash_table_add (instances, instance);
|
|
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), instance->name);
|
|
}
|
|
|
|
static void
|
|
unset_instance (GtkAdjustment *adjustment)
|
|
{
|
|
if (instance_combo)
|
|
gtk_combo_box_set_active (GTK_COMBO_BOX (instance_combo), 0);
|
|
}
|
|
|
|
static void
|
|
instance_changed (GtkComboBox *combo)
|
|
{
|
|
char *text;
|
|
Instance *instance;
|
|
Instance ikey;
|
|
int i;
|
|
unsigned int coords_length;
|
|
float *coords = NULL;
|
|
hb_ot_var_axis_info_t *ai = NULL;
|
|
unsigned int n_axes;
|
|
PangoFont *pango_font = NULL;
|
|
hb_font_t *hb_font;
|
|
hb_face_t *hb_face;
|
|
|
|
text = gtk_combo_box_text_get_active_text (GTK_COMBO_BOX_TEXT (combo));
|
|
if (text[0] == '\0')
|
|
goto out;
|
|
|
|
ikey.name = text;
|
|
instance = g_hash_table_lookup (instances, &ikey);
|
|
if (!instance)
|
|
{
|
|
g_print ("did not find instance %s\n", text);
|
|
goto out;
|
|
}
|
|
|
|
pango_font = get_pango_font ();
|
|
hb_font = pango_font_get_hb_font (pango_font);
|
|
hb_face = hb_font_get_face (hb_font);
|
|
|
|
n_axes = hb_ot_var_get_axis_infos (hb_face, 0, NULL, NULL);
|
|
ai = g_new (hb_ot_var_axis_info_t, n_axes);
|
|
hb_ot_var_get_axis_infos (hb_face, 0, &n_axes, ai);
|
|
|
|
coords = g_new (float, n_axes);
|
|
hb_ot_var_named_instance_get_design_coords (hb_face,
|
|
instance->index,
|
|
&coords_length,
|
|
coords);
|
|
|
|
for (i = 0; i < n_axes; i++)
|
|
{
|
|
Axis *axis;
|
|
Axis akey;
|
|
gdouble value;
|
|
|
|
value = coords[ai[i].axis_index];
|
|
|
|
akey.tag = ai[i].tag;
|
|
axis = g_hash_table_lookup (axes, &akey);
|
|
if (axis)
|
|
{
|
|
g_signal_handlers_block_by_func (axis->adjustment, unset_instance, NULL);
|
|
gtk_adjustment_set_value (axis->adjustment, value);
|
|
g_signal_handlers_unblock_by_func (axis->adjustment, unset_instance, NULL);
|
|
}
|
|
}
|
|
|
|
out:
|
|
g_free (text);
|
|
g_clear_object (&pango_font);
|
|
g_free (ai);
|
|
g_free (coords);
|
|
}
|
|
|
|
static gboolean
|
|
matches_instance (hb_face_t *hb_face,
|
|
unsigned int index,
|
|
unsigned int n_axes,
|
|
float *coords)
|
|
{
|
|
float *instance_coords;
|
|
unsigned int coords_length;
|
|
int i;
|
|
|
|
instance_coords = g_new (float, n_axes);
|
|
coords_length = n_axes;
|
|
|
|
hb_ot_var_named_instance_get_design_coords (hb_face,
|
|
index,
|
|
&coords_length,
|
|
instance_coords);
|
|
|
|
for (i = 0; i < n_axes; i++)
|
|
if (instance_coords[i] != coords[i])
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
add_font_plane (int i)
|
|
{
|
|
GtkWidget *plane;
|
|
Axis *weight_axis;
|
|
Axis *width_axis;
|
|
|
|
Axis key;
|
|
|
|
key.tag = MAKE_TAG('w','g','h','t');
|
|
weight_axis = g_hash_table_lookup (axes, &key);
|
|
key.tag = MAKE_TAG('w','d','t','h');
|
|
width_axis = g_hash_table_lookup (axes, &key);
|
|
|
|
if (weight_axis && width_axis)
|
|
{
|
|
plane = gtk_font_plane_new (weight_axis->adjustment,
|
|
width_axis->adjustment);
|
|
|
|
gtk_widget_set_size_request (plane, 300, 300);
|
|
gtk_widget_set_halign (plane, GTK_ALIGN_CENTER);
|
|
gtk_grid_attach (GTK_GRID (variations_grid), plane, 0, i, 3, 1);
|
|
}
|
|
}
|
|
|
|
/* 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 void
|
|
update_font_variations (void)
|
|
{
|
|
GtkWidget *child, *next;
|
|
PangoFont *pango_font = NULL;
|
|
hb_font_t *hb_font;
|
|
hb_face_t *hb_face;
|
|
unsigned int n_axes;
|
|
hb_ot_var_axis_info_t *ai = NULL;
|
|
float *design_coords = NULL;
|
|
const int *coords;
|
|
unsigned int length;
|
|
int i;
|
|
|
|
child = gtk_widget_get_first_child (variations_grid);
|
|
while (child != NULL)
|
|
{
|
|
next = gtk_widget_get_next_sibling (child);
|
|
gtk_widget_destroy (child);
|
|
child = next;
|
|
}
|
|
|
|
instance_combo = NULL;
|
|
|
|
g_hash_table_remove_all (axes);
|
|
g_hash_table_remove_all (instances);
|
|
|
|
pango_font = get_pango_font ();
|
|
hb_font = pango_font_get_hb_font (pango_font);
|
|
hb_face = hb_font_get_face (hb_font);
|
|
|
|
n_axes = hb_ot_var_get_axis_infos (hb_face, 0, NULL, NULL);
|
|
if (n_axes == 0)
|
|
goto done;
|
|
|
|
ai = g_new0 (hb_ot_var_axis_info_t, n_axes);
|
|
design_coords = g_new (float, n_axes);
|
|
|
|
hb_ot_var_get_axis_infos (hb_face, 0, &n_axes, ai);
|
|
coords = hb_font_get_var_coords_normalized (hb_font, &length);
|
|
for (i = 0; i < length; i++)
|
|
design_coords[i] = denorm_coord (&ai[i], coords[i]);
|
|
|
|
if (hb_ot_var_get_named_instance_count (hb_face) > 0)
|
|
{
|
|
GtkWidget *label;
|
|
GtkWidget *combo;
|
|
|
|
label = gtk_label_new ("Instance");
|
|
gtk_label_set_xalign (GTK_LABEL (label), 0);
|
|
gtk_widget_set_halign (label, GTK_ALIGN_START);
|
|
gtk_widget_set_valign (label, GTK_ALIGN_BASELINE);
|
|
gtk_grid_attach (GTK_GRID (variations_grid), label, 0, -1, 2, 1);
|
|
|
|
combo = gtk_combo_box_text_new ();
|
|
gtk_widget_set_valign (combo, GTK_ALIGN_BASELINE);
|
|
|
|
gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), "");
|
|
|
|
for (i = 0; i < hb_ot_var_get_named_instance_count (hb_face); i++)
|
|
add_instance (hb_face, i, combo, i);
|
|
|
|
for (i = 0; i < hb_ot_var_get_named_instance_count (hb_face); i++)
|
|
{
|
|
if (matches_instance (hb_face, i, n_axes, design_coords))
|
|
{
|
|
gtk_combo_box_set_active (GTK_COMBO_BOX (combo), i + 1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
gtk_grid_attach (GTK_GRID (variations_grid), combo, 1, -1, 2, 1);
|
|
g_signal_connect (combo, "changed", G_CALLBACK (instance_changed), NULL);
|
|
instance_combo = combo;
|
|
}
|
|
|
|
for (i = 0; i < n_axes; i++)
|
|
add_axis (hb_face, &ai[i], design_coords[i], i);
|
|
|
|
add_font_plane (n_axes);
|
|
|
|
done:
|
|
g_clear_object (&pango_font);
|
|
g_free (ai);
|
|
g_free (design_coords);
|
|
}
|
|
|
|
void
|
|
font_features_font_changed (void)
|
|
{
|
|
update_script_combo ();
|
|
update_features ();
|
|
update_font_variations ();
|
|
}
|
|
|
|
void
|
|
font_features_script_changed (void)
|
|
{
|
|
update_features ();
|
|
update_display ();
|
|
}
|
|
|
|
void
|
|
font_features_reset_features (void)
|
|
{
|
|
GList *l;
|
|
|
|
gtk_label_select_region (GTK_LABEL (the_label), 0, 0);
|
|
|
|
g_list_free_full (ranges, free_range);
|
|
ranges = NULL;
|
|
|
|
for (l = feature_items; l; l = l->next)
|
|
{
|
|
FeatureItem *item = l->data;
|
|
|
|
if (GTK_IS_RADIO_BUTTON (item->feat))
|
|
{
|
|
if (strcmp (item->name, "xxxx") == 0)
|
|
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (item->feat), TRUE);
|
|
}
|
|
else if (GTK_IS_CHECK_BUTTON (item->feat))
|
|
{
|
|
gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (item->feat), FALSE);
|
|
set_inconsistent (GTK_CHECK_BUTTON (item->feat), TRUE);
|
|
}
|
|
}
|
|
}
|
|
|
|
static char *text;
|
|
|
|
static void
|
|
switch_to_entry (void)
|
|
{
|
|
text = g_strdup (gtk_editable_get_text (GTK_EDITABLE (the_entry)));
|
|
gtk_stack_set_visible_child_name (GTK_STACK (stack), "entry");
|
|
gtk_widget_grab_focus (the_entry);
|
|
}
|
|
|
|
static void
|
|
switch_to_label (void)
|
|
{
|
|
g_free (text);
|
|
text = NULL;
|
|
gtk_stack_set_visible_child_name (GTK_STACK (stack), "label");
|
|
update_display ();
|
|
}
|
|
|
|
void
|
|
font_features_toggle_edit (void)
|
|
{
|
|
if (strcmp (gtk_stack_get_visible_child_name (GTK_STACK (stack)), "label") == 0)
|
|
switch_to_entry ();
|
|
else
|
|
switch_to_label ();
|
|
}
|
|
|
|
void
|
|
font_features_stop_edit (void)
|
|
{
|
|
g_signal_emit_by_name (edit_toggle, "clicked");
|
|
}
|
|
|
|
static gboolean
|
|
entry_key_press (GtkEventController *controller,
|
|
guint keyval,
|
|
guint keycode,
|
|
GdkModifierType modifiers,
|
|
GtkEntry *entry)
|
|
{
|
|
if (keyval == GDK_KEY_Escape)
|
|
{
|
|
gtk_editable_set_text (GTK_EDITABLE (entry), text);
|
|
font_features_stop_edit ();
|
|
return GDK_EVENT_STOP;
|
|
}
|
|
|
|
return GDK_EVENT_PROPAGATE;
|
|
}
|
|
|
|
GtkWidget *
|
|
do_font_features (GtkWidget *do_widget)
|
|
{
|
|
static GtkWidget *window = NULL;
|
|
|
|
if (!window)
|
|
{
|
|
GtkBuilder *builder;
|
|
GtkWidget *feature_list;
|
|
GtkEventController *controller;
|
|
|
|
builder = gtk_builder_new_from_resource ("/font_features/font-features.ui");
|
|
|
|
window = GTK_WIDGET (gtk_builder_get_object (builder, "window"));
|
|
feature_list = GTK_WIDGET (gtk_builder_get_object (builder, "feature_list"));
|
|
the_label = GTK_WIDGET (gtk_builder_get_object (builder, "label"));
|
|
settings = GTK_WIDGET (gtk_builder_get_object (builder, "settings"));
|
|
description = GTK_WIDGET (gtk_builder_get_object (builder, "description"));
|
|
resetbutton = GTK_WIDGET (gtk_builder_get_object (builder, "reset"));
|
|
font = GTK_WIDGET (gtk_builder_get_object (builder, "font"));
|
|
script_lang = GTK_WIDGET (gtk_builder_get_object (builder, "script_lang"));
|
|
stack = GTK_WIDGET (gtk_builder_get_object (builder, "stack"));
|
|
the_entry = GTK_WIDGET (gtk_builder_get_object (builder, "entry"));
|
|
edit_toggle = GTK_WIDGET (gtk_builder_get_object (builder, "edit_toggle"));
|
|
|
|
controller = gtk_event_controller_key_new ();
|
|
g_object_set_data_full (G_OBJECT (the_entry), "controller", g_object_ref (controller), g_object_unref);
|
|
g_signal_connect (controller, "key-pressed", G_CALLBACK (entry_key_press), the_entry);
|
|
gtk_widget_add_controller (the_entry, controller);
|
|
|
|
add_check_group (feature_list, _("Kerning"), (const char *[]){ "kern", NULL });
|
|
add_check_group (feature_list, _("Ligatures"), (const char *[]){ "liga",
|
|
"dlig",
|
|
"hlig",
|
|
"clig",
|
|
"rlig", NULL });
|
|
add_check_group (feature_list, _("Letter Case"), (const char *[]){ "smcp",
|
|
"c2sc",
|
|
"pcap",
|
|
"c2pc",
|
|
"unic",
|
|
"cpsp",
|
|
"case",NULL });
|
|
add_radio_group (feature_list, _("Number Case"), (const char *[]){ "xxxx",
|
|
"lnum",
|
|
"onum", NULL });
|
|
add_radio_group (feature_list, _("Number Spacing"), (const char *[]){ "xxxx",
|
|
"pnum",
|
|
"tnum", NULL });
|
|
add_radio_group (feature_list, _("Fractions"), (const char *[]){ "xxxx",
|
|
"frac",
|
|
"afrc", NULL });
|
|
add_check_group (feature_list, _("Numeric Extras"), (const char *[]){ "zero",
|
|
"nalt",
|
|
"sinf", NULL });
|
|
add_check_group (feature_list, _("Character Alternatives"), (const char *[]){ "swsh",
|
|
"cswh",
|
|
"locl",
|
|
"calt",
|
|
"falt",
|
|
"hist",
|
|
"salt",
|
|
"jalt",
|
|
"titl",
|
|
"rand",
|
|
"subs",
|
|
"sups",
|
|
"ordn",
|
|
"ltra",
|
|
"ltrm",
|
|
"rtla",
|
|
"rtlm",
|
|
"rclt", NULL });
|
|
add_check_group (feature_list, _("Positional Alternatives"), (const char *[]){ "init",
|
|
"medi",
|
|
"med2",
|
|
"fina",
|
|
"fin2",
|
|
"fin3",
|
|
"isol", NULL });
|
|
add_check_group (feature_list, _("Width Variants"), (const char *[]){ "fwid",
|
|
"hwid",
|
|
"halt",
|
|
"pwid",
|
|
"palt",
|
|
"twid",
|
|
"qwid", NULL });
|
|
add_check_group (feature_list, _("Alternative Stylistic Sets"), (const char *[]){ "ss00",
|
|
"ss01",
|
|
"ss02",
|
|
"ss03",
|
|
"ss04",
|
|
"ss05",
|
|
"ss06",
|
|
"ss07",
|
|
"ss08",
|
|
"ss09",
|
|
"ss10",
|
|
"ss11",
|
|
"ss12",
|
|
"ss13",
|
|
"ss14",
|
|
"ss15",
|
|
"ss16",
|
|
"ss17",
|
|
"ss18",
|
|
"ss19",
|
|
"ss20", NULL });
|
|
add_check_group (feature_list, _("Mathematical"), (const char *[]){ "dtls",
|
|
"flac",
|
|
"mgrk",
|
|
"ssty", NULL });
|
|
add_check_group (feature_list, _("Optical Bounds"), (const char *[]){ "opbd",
|
|
"lfbd",
|
|
"rtbd", NULL });
|
|
feature_items = g_list_reverse (feature_items);
|
|
|
|
variations_heading = GTK_WIDGET (gtk_builder_get_object (builder, "variations_heading"));
|
|
variations_grid = GTK_WIDGET (gtk_builder_get_object (builder, "variations_grid"));
|
|
if (instances == NULL)
|
|
instances = g_hash_table_new_full (instance_hash, instance_equal, NULL, free_instance);
|
|
else
|
|
g_hash_table_remove_all (instances);
|
|
|
|
if (axes == NULL)
|
|
axes = g_hash_table_new_full (axes_hash, axes_equal, NULL, g_free);
|
|
else
|
|
g_hash_table_remove_all (axes);
|
|
|
|
font_features_font_changed ();
|
|
|
|
g_signal_connect (window, "destroy",
|
|
G_CALLBACK (gtk_widget_destroyed), &window);
|
|
|
|
g_object_unref (builder);
|
|
|
|
update_display ();
|
|
}
|
|
|
|
if (!gtk_widget_get_visible (window))
|
|
gtk_window_present (GTK_WINDOW (window));
|
|
else
|
|
gtk_widget_destroy (window);
|
|
|
|
return window;
|
|
}
|