1 files changed, 266 insertions, 0 deletions

diff --git a/src/ui/new_contact.c b/src/ui/new_contact.c
new file mode 100644
index 0000000..f9cd215
--- /dev/null
+++ b/src/ui/new_contact.c
@@ -0,0 +1,266 @@
+/*
+   This file is part of GNUnet.
+   Copyright (C) 2021 GNUnet e.V.
+
+   GNUnet is free software: you can redistribute it and/or modify it
+   under the terms of the GNU Affero General Public License as published
+   by the Free Software Foundation, either version 3 of the License,
+   or (at your option) any later version.
+
+   GNUnet 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
+   Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   SPDX-License-Identifier: AGPL3.0-or-later
+ */
+/*
+ * @author Tobias Frisch
+ * @file ui/new_platform.h
+ */
+
+#include "new_contact.h"
+
+#include "../application.h"
+
+static void
+handle_cancel_button_click(UNUSED GtkButton *button,
+                           gpointer user_data)
+{
+  GtkDialog *dialog = GTK_DIALOG(user_data);
+  gtk_window_close(GTK_WINDOW(dialog));
+}
+
+static void
+handle_confirm_button_click(UNUSED GtkButton *button,
+                            gpointer user_data)
+{
+  MESSENGER_Application *app = (MESSENGER_Application*) user_data;
+
+  // TODO: Add new contact
+
+  gtk_window_close(GTK_WINDOW(app->ui.new_contact.dialog));
+}
+
+static void
+handle_dialog_destroy(UNUSED GtkWidget *window,
+                      gpointer user_data)
+{
+  ui_new_contact_dialog_cleanup((UI_NEW_CONTACT_Handle*) user_data);
+}
+
+static gboolean
+handle_id_drawing_area_draw(GtkWidget* drawing_area,
+                            cairo_t* cairo,
+                            gpointer user_data)
+{
+  UI_NEW_CONTACT_Handle *handle = (UI_NEW_CONTACT_Handle*) user_data;
+
+  GtkStyleContext* context = gtk_widget_get_style_context(drawing_area);
+
+  const guint width = gtk_widget_get_allocated_width(drawing_area);
+  const guint height = gtk_widget_get_allocated_height(drawing_area);
+
+  gtk_render_background(context, cairo, 0, 0, width, height);
+
+  GdkPixbuf *image = NULL;
+
+  if (handle->image)
+  {
+    uint w, h;
+    zbar_image_get_size(handle->image, &w, &h);
+
+    const void* data = zbar_image_get_data(handle->image);
+
+    image = gdk_pixbuf_new_from_data(
+      data,
+      GDK_COLORSPACE_RGB,
+      FALSE,
+      8,
+      w,
+      h,
+      w * 3,
+      NULL,
+      NULL
+    );
+  }
+
+  if (!image)
+    return FALSE;
+
+  int dwidth = gdk_pixbuf_get_width(image);
+  int dheight = gdk_pixbuf_get_height(image);
+
+  double ratio_width = 1.0 * width / dwidth;
+  double ratio_height = 1.0 * height / dheight;
+
+  const double ratio = ratio_width < ratio_height? ratio_width : ratio_height;
+
+  dwidth = (int) (dwidth * ratio);
+  dheight = (int) (dheight * ratio);
+
+  double dx = (width - dwidth) * 0.5;
+  double dy = (height - dheight) * 0.5;
+
+  const int interp_type = (ratio >= 1.0?
+      GDK_INTERP_NEAREST :
+      GDK_INTERP_BILINEAR
+  );
+
+  GdkPixbuf* scaled = gdk_pixbuf_scale_simple(
+      image,
+      dwidth,
+      dheight,
+      interp_type
+  );
+
+  gtk_render_icon(context, cairo, scaled, dx, dy);
+
+  cairo_fill(cairo);
+
+  g_object_unref(scaled);
+  g_object_unref(image);
+
+  zbar_image_destroy(handle->image);
+  handle->image = NULL;
+
+  return FALSE;
+}
+
+static gboolean
+idle_video_processing(gpointer user_data)
+{
+  UI_NEW_CONTACT_Handle *handle = (UI_NEW_CONTACT_Handle*) user_data;
+
+  if (0 == handle->idle_processing)
+    return FALSE;
+
+  zbar_image_t *image = zbar_video_next_image(handle->video);
+
+  if (!image)
+    return TRUE;
+
+  zbar_image_t *rgb = zbar_image_convert(
+      image,
+      zbar_fourcc('R', 'G', 'B', '3')
+  );
+
+  if (!rgb)
+    goto cleanup_image;
+
+  if (handle->image)
+    zbar_image_destroy(handle->image);
+
+  handle->image = rgb;
+
+  if (handle->id_drawing_area)
+    gtk_widget_queue_draw(GTK_WIDGET(handle->id_drawing_area));
+
+cleanup_image:
+  zbar_image_destroy(image);
+  return TRUE;
+}
+
+static void*
+_ui_new_contact_video_thread(void *args)
+{
+  UI_NEW_CONTACT_Handle *handle = (UI_NEW_CONTACT_Handle*) args;
+
+  if (0 != zbar_video_open(handle->video, "/dev/video0"))
+    return NULL;
+
+  if (0 != zbar_video_enable(handle->video, 1))
+    return NULL;
+
+  handle->idle_processing = g_idle_add(idle_video_processing, handle);
+  return NULL;
+}
+
+void
+ui_new_contact_dialog_init(MESSENGER_Application *app,
+                           UI_NEW_CONTACT_Handle *handle)
+{
+  handle->video = zbar_video_create();
+  handle->scanner = zbar_image_scanner_create();
+
+  pthread_create(&(handle->video_tid), NULL, _ui_new_contact_video_thread, handle);
+
+  GtkBuilder* builder = gtk_builder_new_from_file("resources/ui/new_contact.ui");
+
+  handle->dialog = GTK_DIALOG(
+      gtk_builder_get_object(builder, "new_contact_dialog")
+  );
+
+  gtk_window_set_title(
+      GTK_WINDOW(handle->dialog),
+      "New Contact"
+  );
+
+  gtk_window_set_transient_for(
+      GTK_WINDOW(handle->dialog),
+      GTK_WINDOW(app->ui.messenger.main_window)
+  );
+
+  handle->id_drawing_area = GTK_DRAWING_AREA(
+      gtk_builder_get_object(builder, "id_drawing_area")
+  );
+
+  g_signal_connect(
+      handle->id_drawing_area,
+      "draw",
+      G_CALLBACK(handle_id_drawing_area_draw),
+      handle
+  );
+
+  handle->id_entry = GTK_ENTRY(
+      gtk_builder_get_object(builder, "platform_entry")
+  );
+
+  handle->cancel_button = GTK_BUTTON(
+      gtk_builder_get_object(builder, "cancel_button")
+  );
+
+  g_signal_connect(
+      handle->cancel_button,
+      "clicked",
+      G_CALLBACK(handle_cancel_button_click),
+      handle->dialog
+  );
+
+  handle->confirm_button = GTK_BUTTON(
+      gtk_builder_get_object(builder, "confirm_button")
+  );
+
+  g_signal_connect(
+      handle->confirm_button,
+      "clicked",
+      G_CALLBACK(handle_confirm_button_click),
+      app
+  );
+
+  g_signal_connect(
+      handle->dialog,
+      "destroy",
+      G_CALLBACK(handle_dialog_destroy),
+      handle
+  );
+
+  handle->idle_processing = 0;
+}
+
+void
+ui_new_contact_dialog_cleanup(UI_NEW_CONTACT_Handle *handle)
+{
+  pthread_join(handle->video_tid, NULL);
+
+  if (0 != handle->idle_processing)
+    g_source_remove(handle->idle_processing);
+
+  handle->idle_processing = 0;
+
+  zbar_image_scanner_destroy(handle->scanner);
+  zbar_video_destroy(handle->video);
+}