gtk2/gtk/gtkemojichooser.c

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/* gtkemojichooser.c: An Emoji chooser widget
* Copyright 2017, Red Hat, Inc.
*
* 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 <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkemojichooser.h"
#include "gtkadjustment.h"
#include "gtkbox.h"
#include "gtkbutton.h"
#include "gtkcssprovider.h"
#include "gtkentry.h"
#include "gtkflowbox.h"
#include "gtkstack.h"
#include "gtklabel.h"
#include "gtkgesturelongpress.h"
#include "gtkpopover.h"
#include "gtkscrolledwindow.h"
#include "gtkintl.h"
#include "gtkprivate.h"
typedef struct {
GtkWidget *box;
GtkWidget *heading;
GtkWidget *button;
const char *first;
gunichar label;
gboolean empty;
} EmojiSection;
struct _GtkEmojiChooser
{
GtkPopover parent_instance;
GtkWidget *search_entry;
GtkWidget *stack;
GtkWidget *scrolled_window;
EmojiSection recent;
EmojiSection people;
EmojiSection body;
EmojiSection nature;
EmojiSection food;
EmojiSection travel;
EmojiSection activities;
EmojiSection objects;
EmojiSection symbols;
EmojiSection flags;
GtkGesture *recent_press;
GtkGesture *people_press;
GtkGesture *body_press;
GVariant *data;
GSettings *settings;
};
struct _GtkEmojiChooserClass {
GtkPopoverClass parent_class;
};
enum {
EMOJI_PICKED,
LAST_SIGNAL
};
static int signals[LAST_SIGNAL];
G_DEFINE_TYPE (GtkEmojiChooser, gtk_emoji_chooser, GTK_TYPE_POPOVER)
static void
gtk_emoji_chooser_finalize (GObject *object)
{
GtkEmojiChooser *chooser = GTK_EMOJI_CHOOSER (object);
g_variant_unref (chooser->data);
g_object_unref (chooser->settings);
G_OBJECT_CLASS (gtk_emoji_chooser_parent_class)->finalize (object);
}
static void
scroll_to_section (GtkButton *button,
gpointer data)
{
EmojiSection *section = data;
GtkEmojiChooser *chooser;
GtkAdjustment *adj;
GtkAllocation alloc = { 0, 0, 0, 0 };
double page_increment, value;
gboolean dummy;
chooser = GTK_EMOJI_CHOOSER (gtk_widget_get_ancestor (GTK_WIDGET (button), GTK_TYPE_EMOJI_CHOOSER));
adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (chooser->scrolled_window));
if (section->heading)
gtk_widget_get_allocation (section->heading, &alloc);
page_increment = gtk_adjustment_get_page_increment (adj);
value = gtk_adjustment_get_value (adj);
gtk_adjustment_set_page_increment (adj, alloc.y - value);
g_signal_emit_by_name (chooser->scrolled_window, "scroll-child", GTK_SCROLL_PAGE_FORWARD, FALSE, &dummy);
gtk_adjustment_set_page_increment (adj, page_increment);
}
static void
add_emoji (GtkWidget *box,
gboolean prepend,
GVariant *item,
gunichar modifier);
#define MAX_RECENT (7*3)
static void
populate_recent_section (GtkEmojiChooser *chooser)
{
GVariant *variant;
GVariant *item;
GVariantIter iter;
variant = g_settings_get_value (chooser->settings, "recent-emoji");
g_variant_iter_init (&iter, variant);
while ((item = g_variant_iter_next_value (&iter)))
{
GVariant *emoji_data;
gunichar modifier;
emoji_data = g_variant_get_child_value (item, 0);
g_variant_get_child (item, 1, "u", &modifier);
add_emoji (chooser->recent.box, FALSE, emoji_data, modifier);
g_variant_unref (emoji_data);
g_variant_unref (item);
}
g_variant_unref (variant);
}
static void
add_recent_item (GtkEmojiChooser *chooser,
GVariant *item,
gunichar modifier)
{
GList *children, *l;
int i;
GVariantBuilder builder;
g_variant_ref (item);
g_variant_builder_init (&builder, G_VARIANT_TYPE ("a((auss)u)"));
g_variant_builder_add (&builder, "(@(auss)u)", item, modifier);
children = gtk_container_get_children (GTK_CONTAINER (chooser->recent.box));
for (l = children, i = 1; l; l = l->next, i++)
{
GVariant *item2 = g_object_get_data (G_OBJECT (l->data), "emoji-data");
gunichar modifier2 = GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (l->data), "modifier"));
if (modifier == modifier2 && g_variant_equal (item, item2))
{
gtk_widget_destroy (GTK_WIDGET (l->data));
i--;
continue;
}
if (i >= MAX_RECENT)
{
gtk_widget_destroy (GTK_WIDGET (l->data));
continue;
}
g_variant_builder_add (&builder, "(@(auss)u)", item2, modifier2);
}
g_list_free (children);
add_emoji (chooser->recent.box, TRUE, item, modifier);
g_settings_set_value (chooser->settings, "recent-emoji", g_variant_builder_end (&builder));
g_variant_unref (item);
}
static void
emoji_activated (GtkFlowBox *box,
GtkFlowBoxChild *child,
gpointer data)
{
GtkEmojiChooser *chooser = data;
char *text;
GtkWidget *label;
GVariant *item;
gunichar modifier;
gtk_popover_popdown (GTK_POPOVER (chooser));
label = gtk_bin_get_child (GTK_BIN (child));
text = g_strdup (gtk_label_get_label (GTK_LABEL (label)));
item = (GVariant*) g_object_get_data (G_OBJECT (child), "emoji-data");
modifier = (gunichar) GPOINTER_TO_UINT (g_object_get_data (G_OBJECT (child), "modifier"));
add_recent_item (chooser, item, modifier);
g_signal_emit (data, signals[EMOJI_PICKED], 0, text);
g_free (text);
}
static void
long_pressed_cb (GtkGesture *gesture,
double x,
double y,
gpointer data)
{
GtkWidget *child;
GtkWidget *popover;
GtkWidget *view;
GtkWidget *box;
GVariant *emoji_data;
GtkWidget *parent_popover;
GVariant *codes;
int i;
gboolean has_variations;
gunichar modifier;
box = gtk_event_controller_get_widget (GTK_EVENT_CONTROLLER (gesture));
child = GTK_WIDGET (gtk_flow_box_get_child_at_pos (GTK_FLOW_BOX (box), x, y));
if (!child)
return;
emoji_data = (GVariant*) g_object_get_data (G_OBJECT (child), "emoji-data");
if (!emoji_data)
return;
has_variations = FALSE;
codes = g_variant_get_child_value (emoji_data, 0);
for (i = 0; i < g_variant_n_children (codes); i++)
{
gunichar code;
g_variant_get_child (codes, i, "u", &code);
if (code == 0)
{
has_variations = TRUE;
break;
}
}
g_variant_unref (codes);
if (!has_variations)
return;
parent_popover = gtk_widget_get_ancestor (child, GTK_TYPE_POPOVER);
popover = gtk_popover_new (child);
view = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_style_context_add_class (gtk_widget_get_style_context (view), "view");
box = gtk_flow_box_new ();
gtk_flow_box_set_homogeneous (GTK_FLOW_BOX (box), TRUE);
gtk_flow_box_set_min_children_per_line (GTK_FLOW_BOX (box), 6);
gtk_flow_box_set_max_children_per_line (GTK_FLOW_BOX (box), 6);
gtk_flow_box_set_activate_on_single_click (GTK_FLOW_BOX (box), TRUE);
gtk_flow_box_set_selection_mode (GTK_FLOW_BOX (box), GTK_SELECTION_NONE);
gtk_container_add (GTK_CONTAINER (popover), view);
gtk_container_add (GTK_CONTAINER (view), box);
g_signal_connect (box, "child-activated", G_CALLBACK (emoji_activated), parent_popover);
add_emoji (box, FALSE, emoji_data, 0);
for (modifier = 0x1f3fb; modifier <= 0x1f3ff; modifier++)
add_emoji (box, FALSE, emoji_data, modifier);
gtk_popover_popup (GTK_POPOVER (popover));
}
static void
add_emoji (GtkWidget *box,
gboolean prepend,
GVariant *item,
gunichar modifier)
{
GtkWidget *child;
GtkWidget *label;
PangoAttrList *attrs;
GVariant *codes;
char text[64];
char *p = text;
int i;
codes = g_variant_get_child_value (item, 0);
for (i = 0; i < g_variant_n_children (codes); i++)
{
gunichar code;
g_variant_get_child (codes, i, "u", &code);
if (code == 0)
code = modifier;
if (code != 0)
p += g_unichar_to_utf8 (code, p);
}
p[0] = 0;
label = gtk_label_new (text);
attrs = pango_attr_list_new ();
pango_attr_list_insert (attrs, pango_attr_scale_new (PANGO_SCALE_X_LARGE));
gtk_label_set_attributes (GTK_LABEL (label), attrs);
pango_attr_list_unref (attrs);
child = gtk_flow_box_child_new ();
gtk_style_context_add_class (gtk_widget_get_style_context (child), "emoji");
g_object_set_data_full (G_OBJECT (child), "emoji-data",
g_variant_ref (item),
(GDestroyNotify)g_variant_unref);
if (modifier != 0)
g_object_set_data (G_OBJECT (child), "modifier", GUINT_TO_POINTER (modifier));
gtk_container_add (GTK_CONTAINER (child), label);
gtk_flow_box_insert (GTK_FLOW_BOX (box), child, prepend ? 0 : -1);
}
static void
populate_emoji_chooser (GtkEmojiChooser *chooser)
{
GBytes *bytes = NULL;
GVariantIter iter;
GVariant *item;
GtkWidget *box;
bytes = g_resources_lookup_data ("/org/gtk/libgtk/emoji/emoji.data", 0, NULL);
chooser->data = g_variant_ref_sink (g_variant_new_from_bytes (G_VARIANT_TYPE ("a(auss)"), bytes, TRUE));
g_variant_iter_init (&iter, chooser->data);
box = chooser->people.box;
while ((item = g_variant_iter_next_value (&iter)))
{
const char *name;
g_variant_get_child (item, 1, "&s", &name);
if (strcmp (name, chooser->body.first) == 0)
box = chooser->body.box;
else if (strcmp (name, chooser->nature.first) == 0)
box = chooser->nature.box;
else if (strcmp (name, chooser->food.first) == 0)
box = chooser->food.box;
else if (strcmp (name, chooser->travel.first) == 0)
box = chooser->travel.box;
else if (strcmp (name, chooser->activities.first) == 0)
box = chooser->activities.box;
else if (strcmp (name, chooser->objects.first) == 0)
box = chooser->objects.box;
else if (strcmp (name, chooser->symbols.first) == 0)
box = chooser->symbols.box;
else if (strcmp (name, chooser->flags.first) == 0)
box = chooser->flags.box;
add_emoji (box, FALSE, item, 0);
}
g_bytes_unref (bytes);
}
static void
update_state (EmojiSection *section,
double value)
{
GtkAllocation alloc = { 0, 0, 0, 20 };
if (section->heading)
gtk_widget_get_allocation (section->heading, &alloc);
if (alloc.y <= value && value < alloc.y + alloc.height)
gtk_widget_set_state_flags (section->button, GTK_STATE_FLAG_CHECKED, FALSE);
else
gtk_widget_unset_state_flags (section->button, GTK_STATE_FLAG_CHECKED);
}
static void
adj_value_changed (GtkAdjustment *adj,
gpointer data)
{
GtkEmojiChooser *chooser = data;
double value = gtk_adjustment_get_value (adj);
update_state (&chooser->recent, value);
update_state (&chooser->people, value);
update_state (&chooser->body, value);
update_state (&chooser->nature, value);
update_state (&chooser->food, value);
update_state (&chooser->travel, value);
update_state (&chooser->activities, value);
update_state (&chooser->objects, value);
update_state (&chooser->symbols, value);
update_state (&chooser->flags, value);
}
static gboolean
filter_func (GtkFlowBoxChild *child,
gpointer data)
{
EmojiSection *section = data;
GtkEmojiChooser *chooser;
GVariant *emoji_data;
const char *text;
const char *name;
gboolean res;
res = TRUE;
chooser = GTK_EMOJI_CHOOSER (gtk_widget_get_ancestor (GTK_WIDGET (child), GTK_TYPE_EMOJI_CHOOSER));
text = gtk_entry_get_text (GTK_ENTRY (chooser->search_entry));
emoji_data = (GVariant *) g_object_get_data (G_OBJECT (child), "emoji-data");
if (text[0] == 0)
goto out;
if (!emoji_data)
goto out;
g_variant_get_child (emoji_data, 1, "&s", &name);
res = strstr (name, text) != NULL;
out:
if (res)
section->empty = FALSE;
return res;
}
static void
invalidate_section (EmojiSection *section)
{
section->empty = TRUE;
gtk_flow_box_invalidate_filter (GTK_FLOW_BOX (section->box));
}
static void
update_headings (GtkEmojiChooser *chooser)
{
gtk_widget_set_visible (chooser->people.heading, !chooser->people.empty);
gtk_widget_set_visible (chooser->people.box, !chooser->people.empty);
gtk_widget_set_visible (chooser->body.heading, !chooser->body.empty);
gtk_widget_set_visible (chooser->body.box, !chooser->body.empty);
gtk_widget_set_visible (chooser->nature.heading, !chooser->nature.empty);
gtk_widget_set_visible (chooser->nature.box, !chooser->nature.empty);
gtk_widget_set_visible (chooser->food.heading, !chooser->food.empty);
gtk_widget_set_visible (chooser->food.box, !chooser->food.empty);
gtk_widget_set_visible (chooser->travel.heading, !chooser->travel.empty);
gtk_widget_set_visible (chooser->travel.box, !chooser->travel.empty);
gtk_widget_set_visible (chooser->activities.heading, !chooser->activities.empty);
gtk_widget_set_visible (chooser->activities.box, !chooser->activities.empty);
gtk_widget_set_visible (chooser->objects.heading, !chooser->objects.empty);
gtk_widget_set_visible (chooser->objects.box, !chooser->objects.empty);
gtk_widget_set_visible (chooser->symbols.heading, !chooser->symbols.empty);
gtk_widget_set_visible (chooser->symbols.box, !chooser->symbols.empty);
gtk_widget_set_visible (chooser->flags.heading, !chooser->flags.empty);
gtk_widget_set_visible (chooser->flags.box, !chooser->flags.empty);
if (chooser->recent.empty && chooser->people.empty &&
chooser->body.empty && chooser->nature.empty &&
chooser->food.empty && chooser->travel.empty &&
chooser->activities.empty && chooser->objects.empty &&
chooser->symbols.empty && chooser->flags.empty)
gtk_stack_set_visible_child_name (GTK_STACK (chooser->stack), "empty");
else
gtk_stack_set_visible_child_name (GTK_STACK (chooser->stack), "list");
}
static void
search_changed (GtkEntry *entry,
gpointer data)
{
GtkEmojiChooser *chooser = data;
invalidate_section (&chooser->recent);
invalidate_section (&chooser->people);
invalidate_section (&chooser->body);
invalidate_section (&chooser->nature);
invalidate_section (&chooser->food);
invalidate_section (&chooser->travel);
invalidate_section (&chooser->activities);
invalidate_section (&chooser->objects);
invalidate_section (&chooser->symbols);
invalidate_section (&chooser->flags);
update_headings (chooser);
}
static void
setup_section (GtkEmojiChooser *chooser,
EmojiSection *section,
const char *first,
gunichar label)
{
char text[14];
char *p;
GtkAdjustment *adj;
section->first = first;
p = text;
p += g_unichar_to_utf8 (label, p);
p += g_unichar_to_utf8 (0xfe0e, p);
p[0] = 0;
gtk_button_set_label (GTK_BUTTON (section->button), text);
adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (chooser->scrolled_window));
gtk_container_set_focus_vadjustment (GTK_CONTAINER (section->box), adj);
gtk_flow_box_set_filter_func (GTK_FLOW_BOX (section->box), filter_func, section, NULL);
g_signal_connect (section->button, "clicked", G_CALLBACK (scroll_to_section), section);
}
static void
gtk_emoji_chooser_init (GtkEmojiChooser *chooser)
{
GtkAdjustment *adj;
chooser->settings = g_settings_new ("org.gtk.Settings.EmojiChooser");
gtk_widget_init_template (GTK_WIDGET (chooser));
chooser->recent_press = gtk_gesture_long_press_new (chooser->recent.box);
g_signal_connect (chooser->recent_press, "pressed", G_CALLBACK (long_pressed_cb), chooser);
chooser->people_press = gtk_gesture_long_press_new (chooser->people.box);
g_signal_connect (chooser->people_press, "pressed", G_CALLBACK (long_pressed_cb), chooser);
chooser->body_press = gtk_gesture_long_press_new (chooser->body.box);
g_signal_connect (chooser->body_press, "pressed", G_CALLBACK (long_pressed_cb), chooser);
adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (chooser->scrolled_window));
g_signal_connect (adj, "value-changed", G_CALLBACK (adj_value_changed), chooser);
setup_section (chooser, &chooser->recent, NULL, 0x1f557);
setup_section (chooser, &chooser->people, "grinning face", 0x1f642);
setup_section (chooser, &chooser->body, "selfie", 0x1f44d);
setup_section (chooser, &chooser->nature, "monkey face", 0x1f337);
setup_section (chooser, &chooser->food, "grapes", 0x1f374);
setup_section (chooser, &chooser->travel, "globe showing Europe-Africa", 0x2708);
setup_section (chooser, &chooser->activities, "jack-o-lantern", 0x1f3c3);
setup_section (chooser, &chooser->objects, "muted speaker", 0x1f514);
setup_section (chooser, &chooser->symbols, "ATM sign", 0x2764);
setup_section (chooser, &chooser->flags, "chequered flag", 0x1f3f4);
populate_emoji_chooser (chooser);
populate_recent_section (chooser);
}
static void
gtk_emoji_chooser_show (GtkWidget *widget)
{
GtkEmojiChooser *chooser = GTK_EMOJI_CHOOSER (widget);
GtkAdjustment *adj;
GTK_WIDGET_CLASS (gtk_emoji_chooser_parent_class)->show (widget);
adj = gtk_scrolled_window_get_vadjustment (GTK_SCROLLED_WINDOW (chooser->scrolled_window));
gtk_adjustment_set_value (adj, 0);
gtk_entry_set_text (GTK_ENTRY (chooser->search_entry), "");
}
static void
gtk_emoji_chooser_class_init (GtkEmojiChooserClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
object_class->finalize = gtk_emoji_chooser_finalize;
widget_class->show = gtk_emoji_chooser_show;
signals[EMOJI_PICKED] = g_signal_new ("emoji-picked",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
0,
NULL, NULL,
NULL,
G_TYPE_NONE, 1, G_TYPE_STRING|G_SIGNAL_TYPE_STATIC_SCOPE);
gtk_widget_class_set_template_from_resource (widget_class, "/org/gtk/libgtk/ui/gtkemojichooser.ui");
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, search_entry);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, stack);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, scrolled_window);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, recent.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, recent.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, people.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, people.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, people.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, body.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, body.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, body.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, nature.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, nature.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, nature.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, food.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, food.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, food.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, travel.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, travel.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, travel.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, activities.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, activities.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, activities.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, objects.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, objects.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, objects.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, symbols.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, symbols.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, symbols.button);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, flags.box);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, flags.heading);
gtk_widget_class_bind_template_child (widget_class, GtkEmojiChooser, flags.button);
gtk_widget_class_bind_template_callback (widget_class, emoji_activated);
gtk_widget_class_bind_template_callback (widget_class, search_changed);
}
GtkWidget *
gtk_emoji_chooser_new (void)
{
return GTK_WIDGET (g_object_new (GTK_TYPE_EMOJI_CHOOSER, NULL));
}