src/libs/styles.c

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/*
    This file is part of darktable,
    Copyright (C) 2010 calca.
    Copyright (C) 2010-2011, 2013 Henrik Andersson.
    Copyright (C) 2010-2011 Olivier Tribout.
    Copyright (C) 2010-2012, 2014-2017 Tobias Ellinghaus.
    Copyright (C) 2011 Antony Dovgal.
    Copyright (C) 2011-2013 johannes hanika.
    Copyright (C) 2011, 2013 Jérémy Rosen.
    Copyright (C) 2011 Robert Bieber.
    Copyright (C) 2012 Frédéric Grollier.
    Copyright (C) 2012 Richard Wonka.
    Copyright (C) 2013 Pascal de Bruijn.
    Copyright (C) 2013-2014, 2019-2022 Pascal Obry.
    Copyright (C) 2014, 2016 Roman Lebedev.
    Copyright (C) 2017 parafin.
    Copyright (C) 2018, 2023 Maurizio Paglia.
    Copyright (C) 2018 rawfiner.
    Copyright (C) 2019, 2022-2023, 2025 Aurélien PIERRE.
    Copyright (C) 2020-2021 Aldric Renaudin.
    Copyright (C) 2020 Chris Elston.
    Copyright (C) 2020 darkelectron.
    Copyright (C) 2020-2022 Diederik Ter Rahe.
    Copyright (C) 2020 EdgarLux.
    Copyright (C) 2020-2021 Hubert Kowalski.
    Copyright (C) 2020 Philippe Weyland.
    Copyright (C) 2020-2021 Ralf Brown.
    Copyright (C) 2021 Marco Carrarini.
    Copyright (C) 2021 Victor Forsiuk.
    Copyright (C) 2022 Martin Bařinka.
    
    darktable is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    darktable 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 General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with darktable.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "widgets/widget_settings.h"
#include "common/act_on.h"
#include "common/history_actions.h"
#include "common/collection.h"
#include "common/styles.h"
#include "gui/common/styles_gui.h"
#include "system/macros.h"
#include "system/mem_alloc.h"
#include "common/logging.h"
#include "common/glib_utils.h"
#include "common/module_versioning.h"
#include "control/signal.h"
#include "database/database.h"
#include "common/conf.h"
#include "control/user_message.h"
 
#include "gui/application.h"
#include "gui/styles.h"
#include "libs/lib.h"
#include "libs/lib_api.h"
#ifdef GDK_WINDOWING_QUARTZ
#include "osx/osx.h"
#endif
#include <gdk/gdkkeysyms.h>
#include <gtk/gtk.h>
#include <stdlib.h>
#include <libxml/parser.h>
#include "widgets/scroll_wrap.h"
 
DT_MODULE(1)
 
typedef struct dt_lib_styles_t
{
  GtkEntry *entry;
  GtkWidget *duplicate;
  GtkTreeView *tree;
  GtkWidget *create_button, *edit_button, *delete_button, *import_button, *export_button, *apply_button;
} dt_lib_styles_t;
 
 
const char *name(struct dt_lib_module_t *self)
{
  return _("apply styles");
}
 
const char **views(dt_lib_module_t *self)
{
  // Goes in popup
  static const char *v[] = {"special", NULL};
  return v;
}
 
uint32_t container(dt_lib_module_t *self)
{
  return DT_UI_CONTAINER_SIZE;
}
 
int position()
{
  return 0;
}
 
typedef enum _styles_columns_t
{
  DT_STYLES_COL_NAME = 0,
  DT_STYLES_COL_TOOLTIP,
  DT_STYLES_COL_FULLNAME,
  DT_STYLES_NUM_COLS
} _styles_columns_t;
 
static gboolean _get_node_for_name(GtkTreeModel *model, gboolean root, GtkTreeIter *iter, const gchar *parent_name)
{
  GtkTreeIter parent = *iter;
 
  if(root)
  {
    // iter is null, we are at the top level
    // if we have no nodes in this tree, let's create it now
    if(!gtk_tree_model_get_iter_first(model, iter))
    {
      gtk_tree_store_append(GTK_TREE_STORE(model), iter, NULL);
      return FALSE;
    }
  }
  else
  {
    // if we have no children, create one, this is our node
    if(!gtk_tree_model_iter_children(GTK_TREE_MODEL(model), iter, &parent))
    {
      gtk_tree_store_append(GTK_TREE_STORE(model), iter, &parent);
      return FALSE;
    }
  }
 
  // here we have iter to be on the right level, let's check if we can find parent_name
  do
  {
    gchar *name;
    gtk_tree_model_get(model, iter, DT_STYLES_COL_NAME, &name, -1);
    const gboolean match = !g_strcmp0(name, parent_name);
    dt_free(name);
    if(match)
    {
      return TRUE;
    }
  }
  while(gtk_tree_model_iter_next(model, iter));
 
  // not found, create it under parent
  gtk_tree_store_append(GTK_TREE_STORE(model), iter, root?NULL:&parent);
 
  return FALSE;
}
 
static void _gui_styles_update_view(dt_lib_styles_t *d)
{
  /* clear current list */
  GtkTreeIter iter;
  GtkTreeModel *model = gtk_tree_view_get_model(GTK_TREE_VIEW(d->tree));
  g_object_ref(model);
  gtk_tree_view_set_model(GTK_TREE_VIEW(d->tree), NULL);
  gtk_tree_store_clear(GTK_TREE_STORE(model));
 
  GList *result = dt_styles_get_list(gtk_entry_get_text(d->entry));
  if(result)
  {
    for(const GList *res_iter = result; res_iter; res_iter = g_list_next(res_iter))
    {
      dt_style_t *style = (dt_style_t *)res_iter->data;
 
      gchar *items_string = (gchar *)dt_styles_get_item_list_as_string(style->name);
      gchar *tooltip = NULL;
 
      if(style->description && *style->description)
      {
        gchar *escaped_description = g_markup_escape_text(style->description, -1);
        tooltip = g_strconcat("<b>", escaped_description, "</b>\n", items_string, NULL);
        dt_free(escaped_description);
      }
      else
      {
        tooltip = g_strdup(items_string);
      }
 
      gchar **split = g_strsplit(style->name, "|", 0);
      int k = 0;
 
      while(split[k])
      {
        const gchar *s = split[k];
        const gboolean node_found = _get_node_for_name(model, k==0, &iter, s);
 
        if(!node_found)
        {
          if(split[k+1])
          {
            gtk_tree_store_set(GTK_TREE_STORE(model), &iter, DT_STYLES_COL_NAME, s, -1);
          }
          else
          {
            // a leaf
            gtk_tree_store_set(GTK_TREE_STORE(model), &iter,
                               DT_STYLES_COL_NAME, s, DT_STYLES_COL_TOOLTIP, tooltip, DT_STYLES_COL_FULLNAME, style->name, -1);
          }
        }
        k++;
      }
      g_strfreev(split);
 
      dt_free(items_string);
      dt_free(tooltip);
    }
    g_list_free_full(result, dt_style_free);
    result = NULL;
  }
 
  gtk_tree_view_set_tooltip_column(GTK_TREE_VIEW(d->tree), DT_STYLES_COL_TOOLTIP);
  gtk_tree_view_set_model(GTK_TREE_VIEW(d->tree), model);
  g_object_unref(model);
}
 
static void _styles_row_activated_callback(GtkTreeView *view, GtkTreePath *path, GtkTreeViewColumn *col,
                                           gpointer user_data)
{
  // This works on double click, so it's for single style
  dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
 
  GtkTreeModel *model;
  GtkTreeIter iter;
  model = gtk_tree_view_get_model(d->tree);
 
  if(!gtk_tree_model_get_iter(model, &iter, path)) return;
 
  gchar *name;
  gtk_tree_model_get(model, &iter, DT_STYLES_COL_FULLNAME, &name, -1);
 
  GList *list = dt_act_on_get_images();
  if(name)
  {
    dt_history_style_on_list(list, name, gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(d->duplicate)));
    dt_free(name);
  }
  g_list_free(list);
  list = NULL;
}
 
// get list of style names from selection
// free returned list with g_list_free_full(list, dt_free_gpointer)
GList* _get_selected_style_names(GList* selected_styles, GtkTreeModel *model)
{
  GtkTreeIter iter;
  GList *style_names = NULL;
  for (const GList *style = selected_styles; style; style = g_list_next(style))
  {
    GValue value = {0,};
    gtk_tree_model_get_iter(model, &iter, (GtkTreePath *)style->data);
    gtk_tree_model_get_value(model, &iter, DT_STYLES_COL_FULLNAME, &value);
    if(G_VALUE_HOLDS_STRING(&value))
      style_names = g_list_prepend(style_names, g_strdup(g_value_get_string(&value)));
    g_value_unset(&value);
  }
  return g_list_reverse(style_names); // list was built in reverse order, so un-reverse it
}
 
static void apply_clicked(GtkWidget *w, gpointer user_data)
{
  dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
  GtkTreeSelection *selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(d->tree));
 
  if(gtk_tree_selection_count_selected_rows(selection) == 0) return;
 
  GtkTreeModel *model= gtk_tree_view_get_model(d->tree);
  GList *selected_styles = gtk_tree_selection_get_selected_rows(selection, &model);
  GList *style_names = _get_selected_style_names(selected_styles, model);
  g_list_free_full(selected_styles, (GDestroyNotify) gtk_tree_path_free);
  selected_styles = NULL;
 
  if(IS_NULL_PTR(style_names)) return;
 
  GList *list = dt_act_on_get_images();
 
  if(list) dt_multiple_styles_apply_to_list(style_names, list, gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(d->duplicate)));
 
  g_list_free_full(style_names, dt_free_gpointer);
  style_names = NULL;
  g_list_free(list);
  list = NULL;
}
 
static void create_clicked(GtkWidget *w, gpointer user_data)
{
  dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
 
  GList *list = dt_act_on_get_images();
  dt_styles_create_from_list(list);
  g_list_free(list);
  list = NULL;
  _gui_styles_update_view(d);
}
 
static void edit_clicked(GtkWidget *w, gpointer user_data)
{
  dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
  GtkTreeSelection *selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(d->tree));
 
  if(gtk_tree_selection_count_selected_rows(selection) == 0) return;
 
  GtkTreeIter iter;
  GtkTreeModel *model= gtk_tree_view_get_model(d->tree);
 
  GList *styles = gtk_tree_selection_get_selected_rows(selection, &model);
  for (const GList *style = styles; style; style = g_list_next(style))
  {
    char *name = NULL;
    GValue value = {0,};
    gtk_tree_model_get_iter(model, &iter, (GtkTreePath *)style->data);
    gtk_tree_model_get_value(model, &iter, DT_STYLES_COL_FULLNAME, &value);
    if(G_VALUE_HOLDS_STRING(&value))
      name = g_strdup(g_value_get_string(&value));
    g_value_unset(&value);
 
    if(name)
    {
      dt_gui_styles_dialog_edit(name);
      _gui_styles_update_view(d);
      dt_free(name);
    }
  }
  g_list_free_full (styles, (GDestroyNotify) gtk_tree_path_free);
}
 
gboolean _ask_before_delete_style(const gint style_cnt)
{
  gint res = GTK_RESPONSE_YES;
 
  if(dt_conf_get_bool("plugins/lighttable/style/ask_before_delete_style"))
  {
    const GtkWidget *win = dt_gui_main_window();
    GtkWidget *dialog = gtk_message_dialog_new
      (GTK_WINDOW(win), GTK_DIALOG_DESTROY_WITH_PARENT, GTK_MESSAGE_QUESTION, GTK_BUTTONS_YES_NO,
       ngettext("do you really want to remove %d style?", "do you really want to remove %d styles?", style_cnt),
       style_cnt);
#ifdef GDK_WINDOWING_QUARTZ
    dt_osx_disallow_fullscreen(dialog);
#endif
 
    gtk_window_set_title(GTK_WINDOW(dialog), ngettext("remove style?", "remove styles?", style_cnt));
    res = gtk_dialog_run(GTK_DIALOG(dialog));
    gtk_widget_destroy(dialog);
  }
 
  return res == GTK_RESPONSE_YES;
}
 
static void delete_clicked(GtkWidget *w, gpointer user_data)
{
  dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
 
  GtkTreeSelection *selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(d->tree));
 
  if(gtk_tree_selection_count_selected_rows(selection) == 0) return;
 
  GtkTreeModel *model= gtk_tree_view_get_model(d->tree);
  GList *selected_styles = gtk_tree_selection_get_selected_rows(selection, &model);
  GList *style_names = _get_selected_style_names(selected_styles, model);
  g_list_free_full(selected_styles, (GDestroyNotify) gtk_tree_path_free);
  selected_styles = NULL;
 
  if(IS_NULL_PTR(style_names)) return;
 
  const gint select_cnt = g_list_length(style_names);
  const gboolean single_raise = (select_cnt == 1);
 
  const gboolean can_delete = _ask_before_delete_style(select_cnt);
 
  if(can_delete)
  {
    dt_database_start_transaction();
 
    for (const GList *style = style_names; style; style = g_list_next(style))
    {
      dt_styles_delete_by_name_adv((char*)style->data, single_raise);
    }
 
    if(!single_raise) {
      // raise signal at the end of processing all styles if we have more than 1 to delete
      // this also calls _gui_styles_update_view
      DT_DEBUG_CONTROL_SIGNAL_RAISE(dt_control_signal_get_global(), DT_SIGNAL_STYLE_CHANGED);
    }
    dt_database_release_transaction();
  }
  g_list_free_full(style_names, dt_free_gpointer);
  style_names = NULL;
}
 
static void export_clicked(GtkWidget *w, gpointer user_data)
{
  dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
 
  GtkTreeSelection *selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(d->tree));
 
  if(gtk_tree_selection_count_selected_rows(selection) == 0) return;
 
  GtkTreeModel *model= gtk_tree_view_get_model(d->tree);
  GList *selected_styles = gtk_tree_selection_get_selected_rows(selection, &model);
  GList *style_names = _get_selected_style_names(selected_styles, model);
  g_list_free_full(selected_styles, (GDestroyNotify) gtk_tree_path_free);
  selected_styles = NULL;
 
  if(IS_NULL_PTR(style_names)) return;
 
  /* variables for overwrite dialog */
  gint overwrite_check_button = 0;
  gint overwrite = 0;
 
  GtkWidget *win = dt_gui_main_window();
  GtkFileChooserNative *filechooser = gtk_file_chooser_native_new(
        _("select directory"), GTK_WINDOW(win), GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER,
        _("_save"), _("_cancel"));
 
  dt_conf_get_folder_to_file_chooser("ui_last/export_path", GTK_FILE_CHOOSER(filechooser));
  gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(filechooser), FALSE);
 
  if(gtk_native_dialog_run(GTK_NATIVE_DIALOG(filechooser)) == GTK_RESPONSE_ACCEPT)
  {
    char *filedir = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(filechooser));
 
    for (const GList *style = style_names; style; style = g_list_next(style))
    {
      char stylename[520];
 
      /* check if file exists before overwriting */
      snprintf(stylename, sizeof(stylename), "%s/%s.dtstyle", filedir, (char*)style->data);
 
      if(g_file_test(stylename, G_FILE_TEST_EXISTS) == TRUE)
      {
        /* do not run overwrite dialog */
        if(overwrite_check_button == 1)
        {
          if(overwrite == 1)
          {
            // save style with overwrite
            dt_styles_save_to_file((char*)style->data, filedir, TRUE);
          }
          else if(overwrite == 2)
          {
            continue;
          }
          else
          {
            break;
          }
        }
        else
        {
          /* create and run dialog */
          char overwrite_str[256];
 
          gint overwrite_dialog_res = GTK_RESPONSE_ACCEPT;
          gint overwrite_dialog_check_button_res = TRUE;
 
          if(dt_conf_get_bool("plugins/lighttable/style/ask_before_delete_style"))
          {
            GtkWidget *dialog_overwrite_export = gtk_dialog_new_with_buttons(_("overwrite style?"), GTK_WINDOW(win), GTK_DIALOG_DESTROY_WITH_PARENT,
                _("cancel"), GTK_RESPONSE_CANCEL,
                _("skip"), GTK_RESPONSE_NONE,
                _("overwrite"), GTK_RESPONSE_ACCEPT, NULL);
 
            // contents for dialog
            GtkWidget *content_area = gtk_dialog_get_content_area(GTK_DIALOG(dialog_overwrite_export));
            sprintf(overwrite_str, _("style `%s' already exists.\ndo you want to overwrite existing style?\n"), (char*)style->data);
            GtkWidget *label = gtk_label_new(overwrite_str);
            GtkWidget *overwrite_dialog_check_button = gtk_check_button_new_with_label(_("apply this option to all existing styles"));
 
            gtk_container_add(GTK_CONTAINER(content_area), label);
            gtk_container_add(GTK_CONTAINER(content_area), overwrite_dialog_check_button);
            gtk_widget_show_all(dialog_overwrite_export);
 
            // disable check button and skip button when only one style is selected
            if(g_list_is_singleton(style_names))
            {
              gtk_widget_set_sensitive(GTK_WIDGET(overwrite_dialog_check_button), FALSE);
              gtk_dialog_set_response_sensitive(GTK_DIALOG(dialog_overwrite_export), GTK_RESPONSE_NONE, FALSE);
            }
 
#ifdef GDK_WINDOWING_QUARTZ
  dt_osx_disallow_fullscreen(dialog_overwrite_export);
#endif
 
            overwrite_dialog_res = gtk_dialog_run(GTK_DIALOG(dialog_overwrite_export));
            overwrite_dialog_check_button_res = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(overwrite_dialog_check_button));
            gtk_widget_destroy(dialog_overwrite_export);
          }
 
          if(overwrite_dialog_res == GTK_RESPONSE_ACCEPT)
          {
            overwrite = 1;
 
            /* do not run dialog on the next conflict when set to 1 */
            if(overwrite_dialog_check_button_res == TRUE)
            {
              overwrite_check_button = 1;
            }
            else
            {
              overwrite_check_button = 0;
            }
          }
          else if(overwrite_dialog_res == GTK_RESPONSE_NONE)
          {
            overwrite = 2;
 
            /* do not run dialog on the next conflict when set to 1 */
            if(overwrite_dialog_check_button_res == TRUE)
            {
              overwrite_check_button = 1;
            }
            else
            {
              overwrite_check_button = 0;
            }
            continue;
          }
          else
          {
            break;
          }
 
          dt_styles_save_to_file((char*)style->data, filedir, TRUE);
        }
      }
      else
      {
        dt_styles_save_to_file((char*)style->data, filedir, FALSE);
      }
      dt_control_log(_("style %s was successfully exported"), (char*)style->data);
    }
    dt_conf_set_folder_from_file_chooser("ui_last/export_path", GTK_FILE_CHOOSER(filechooser));
    dt_free(filedir);
  }
  g_object_unref(filechooser);
  g_list_free_full(style_names, dt_free_gpointer);
  style_names = NULL;
}
 
static void import_clicked(GtkWidget *w, gpointer user_data)
{
  /* variables for overwrite dialog */
  gint overwrite_check_button = 0;
  gint overwrite = 0;
 
  GtkWidget *win = dt_gui_main_window();
  GtkFileChooserNative *filechooser = gtk_file_chooser_native_new(
        _("select style"), GTK_WINDOW(win), GTK_FILE_CHOOSER_ACTION_OPEN,
        _("_open"), _("_cancel"));
 
  dt_conf_get_folder_to_file_chooser("ui_last/import_path", GTK_FILE_CHOOSER(filechooser));
  gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(filechooser), TRUE);
 
  GtkFileFilter *filter;
  filter = GTK_FILE_FILTER(gtk_file_filter_new());
  gtk_file_filter_add_pattern(filter, "*.dtstyle");
  gtk_file_filter_add_pattern(filter, "*.DTSTYLE");
  gtk_file_filter_set_name(filter, _("Ansel style files"));
  gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(filechooser), filter);
 
  filter = GTK_FILE_FILTER(gtk_file_filter_new());
  gtk_file_filter_add_pattern(filter, "*");
  gtk_file_filter_set_name(filter, _("all files"));
 
  gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(filechooser), filter);
 
  if(gtk_native_dialog_run(GTK_NATIVE_DIALOG(filechooser)) == GTK_RESPONSE_ACCEPT)
  {
    GSList *filenames = gtk_file_chooser_get_filenames(GTK_FILE_CHOOSER(filechooser));
 
    for(const GSList *filename = filenames; filename; filename = g_slist_next(filename))
    {
      /* extract name from xml file */
      gchar *bname = NULL;
      xmlDoc *document = xmlReadFile((char*)filename->data, NULL, XML_PARSE_NOBLANKS);
      xmlNode *root = NULL;
      if(!IS_NULL_PTR(document))
        root = xmlDocGetRootElement(document);
 
      if(IS_NULL_PTR(document) || IS_NULL_PTR(root) || xmlStrcmp(root->name, BAD_CAST "darktable_style"))
      {
        dt_print(DT_DEBUG_CONTROL,
                 "[styles] file %s is not a style file\n", (char*)filename->data);
        if(document)
          xmlFreeDoc(document);
        continue;
      }
 
      for(xmlNode *node = root->children->children; node; node = node->next)
      {
        if(node->type == XML_ELEMENT_NODE)
        {
          if(strcmp((char*)node->name, "name") == 0)
          {
            bname = g_strdup((char*)xmlNodeGetContent(node));
            break;
          }
        }
      }
 
      // xml doc is not necessary after this point
      xmlFreeDoc(document);
 
      if(IS_NULL_PTR(bname)){
        dt_print(DT_DEBUG_CONTROL,
                 "[styles] file %s is malformed style file\n", (char*)filename->data);
        continue;
      }
 
      // check if style exists
      if(dt_styles_exists(bname))
      {
        /* do not run overwrite dialog */
        if(overwrite_check_button == 1)
        {
          if(overwrite == 1)
          {
            // remove style then import
            dt_styles_delete_by_name(bname);
            dt_styles_import_from_file((char*)filename->data);
          }
          else if(overwrite == 2)
          {
            continue;
          }
          else
          {
            break;
          }
        }
        else
        {
          /* create and run dialog */
          char overwrite_str[256];
 
          gint overwrite_dialog_res = GTK_RESPONSE_ACCEPT;
          gint overwrite_dialog_check_button_res = TRUE;
 
          // use security check/option
          if(dt_conf_get_bool("plugins/lighttable/style/ask_before_delete_style"))
          {
            GtkWidget *dialog_overwrite_import = gtk_dialog_new_with_buttons(_("overwrite style?"), GTK_WINDOW(win), GTK_DIALOG_DESTROY_WITH_PARENT,
                _("cancel"), GTK_RESPONSE_CANCEL,
                _("skip"), GTK_RESPONSE_NONE,
                _("overwrite"), GTK_RESPONSE_ACCEPT, NULL);
 
            // contents for dialog
            GtkWidget *content_area = gtk_dialog_get_content_area(GTK_DIALOG(dialog_overwrite_import));
            sprintf(overwrite_str, _("style `%s' already exists.\ndo you want to overwrite existing style?\n"), (char*)filename->data);
            GtkWidget *label = gtk_label_new(overwrite_str);
            GtkWidget *overwrite_dialog_check_button = gtk_check_button_new_with_label(_("apply this option to all existing styles"));
 
            gtk_container_add(GTK_CONTAINER(content_area), label);
            gtk_container_add(GTK_CONTAINER(content_area), overwrite_dialog_check_button);
            gtk_widget_show_all(dialog_overwrite_import);
 
            // disable check button and skip button when dealing with one style
            if(g_slist_length(filenames) == 1)
            {
              gtk_widget_set_sensitive(GTK_WIDGET(overwrite_dialog_check_button), FALSE);
              gtk_dialog_set_response_sensitive(GTK_DIALOG(dialog_overwrite_import), GTK_RESPONSE_NONE, FALSE);
            }
 
#ifdef GDK_WINDOWING_QUARTZ
  dt_osx_disallow_fullscreen(dialog_overwrite_import);
#endif
 
            overwrite_dialog_res = gtk_dialog_run(GTK_DIALOG(dialog_overwrite_import));
            overwrite_dialog_check_button_res = gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(overwrite_dialog_check_button));
            gtk_widget_destroy(dialog_overwrite_import);
          }
 
          if(overwrite_dialog_res == GTK_RESPONSE_ACCEPT)
          {
            overwrite = 1;
 
            /* do not run dialog on next conflict when set to 1 */
            if(overwrite_dialog_check_button_res == TRUE)
            {
              overwrite_check_button = 1;
            }
            else
            {
              overwrite_check_button = 0;
            }
          }
          else if(overwrite_dialog_res == GTK_RESPONSE_NONE)
          {
            overwrite = 2;
 
 
            /* do not run dialog on next conflict when set to 1 */
            if(overwrite_dialog_check_button_res == TRUE)
            {
              overwrite_check_button = 1;
            }
            else
            {
              overwrite_check_button = 0;
            }
            continue;
          }
          else
          {
            break;
          }
 
          dt_styles_delete_by_name(bname);
          dt_styles_import_from_file((char*)filename->data);
        }
      }
      else
      {
        dt_styles_import_from_file((char*)filename->data);
      }
      dt_free(bname);
    }
    g_slist_free_full(filenames, dt_free_gpointer);
 
    dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
    _gui_styles_update_view(d);
    dt_conf_set_folder_from_file_chooser("ui_last/import_path", GTK_FILE_CHOOSER(filechooser));
  }
  g_object_unref(filechooser);
}
 
static gboolean entry_callback(GtkEntry *entry, gpointer user_data)
{
  _gui_styles_update_view(user_data);
  return FALSE;
}
 
static gboolean entry_activated(GtkEntry *entry, gpointer user_data)
{
  dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
  const gchar *name = gtk_entry_get_text(d->entry);
  if(name)
  {
    GList *imgs = dt_act_on_get_images();
    dt_history_style_on_list(imgs, name, gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(d->duplicate)));
    g_list_free(imgs);
    imgs = NULL;
  }
 
  return FALSE;
}
 
static gboolean duplicate_callback(GtkEntry *entry, gpointer user_data)
{
  dt_lib_styles_t *d = (dt_lib_styles_t *)user_data;
  dt_conf_set_bool("ui_last/styles_create_duplicate",
                   gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(d->duplicate)));
  return FALSE;
}
 
static void _update(dt_lib_module_t *self)
{
  dt_lib_cancel_postponed_update(self);
  dt_lib_styles_t *d = (dt_lib_styles_t *)self->data;
 
  const gboolean has_act_on = (dt_act_on_get_images_nb(TRUE, FALSE) > 0);
 
  GtkTreeSelection *selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(d->tree));
  const gint sel_styles_cnt = gtk_tree_selection_count_selected_rows(selection);
 
  gtk_widget_set_sensitive(GTK_WIDGET(d->create_button), has_act_on);
  gtk_widget_set_sensitive(GTK_WIDGET(d->edit_button), sel_styles_cnt > 0);
  gtk_widget_set_sensitive(GTK_WIDGET(d->delete_button), sel_styles_cnt > 0);
 
  //import is ALWAYS enabled.
  gtk_widget_set_sensitive(GTK_WIDGET(d->export_button), sel_styles_cnt > 0);
 
  gtk_widget_set_sensitive(GTK_WIDGET(d->apply_button), has_act_on && sel_styles_cnt > 0);
}
 
static void _styles_changed_callback(gpointer instance, gpointer user_data)
{
  dt_lib_module_t *self = (dt_lib_module_t *)user_data;
  dt_lib_styles_t *d = (dt_lib_styles_t *)self->data;
  _gui_styles_update_view(d);
  _update(self);
}
 
static void _image_selection_changed_callback(gpointer instance, dt_lib_module_t *self)
{
  _update(self);
}
 
static void _collection_updated_callback(gpointer instance, dt_collection_change_t query_change,
                                         dt_collection_properties_t changed_property, gpointer imgs, int next,
                                         dt_lib_module_t *self)
{
  _update(self);
}
 
static void _mouse_over_image_callback(gpointer instance, dt_lib_module_t *self)
{
  dt_lib_queue_postponed_update(self, _update);
}
 
static void _tree_selection_changed(GtkTreeSelection *treeselection, gpointer data)
{
  _update((dt_lib_module_t *)data);
}
 
void gui_init(dt_lib_module_t *self)
{
  dt_lib_styles_t *d = (dt_lib_styles_t *)malloc(sizeof(dt_lib_styles_t));
  self->data = (void *)d;
  self->timeout_handle = 0;
  d->edit_button = NULL;
  self->widget = gtk_box_new(GTK_ORIENTATION_VERTICAL, DT_GUI_BOX_SPACING);
  GtkWidget *w;
 
  /* tree */
  d->tree = GTK_TREE_VIEW(gtk_tree_view_new());
  gtk_tree_view_set_headers_visible(d->tree, FALSE);
  GtkTreeStore *treestore = gtk_tree_store_new(DT_STYLES_NUM_COLS, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_STRING);
  GtkTreeViewColumn *col = gtk_tree_view_column_new();
  gtk_tree_view_append_column(GTK_TREE_VIEW(d->tree), col);
  GtkCellRenderer *renderer = gtk_cell_renderer_text_new();
  g_object_set(renderer, "ellipsize", PANGO_ELLIPSIZE_MIDDLE, (gchar *)0);
  gtk_tree_view_column_pack_start(col, renderer, TRUE);
  gtk_tree_view_column_add_attribute(col, renderer, "text", DT_STYLES_COL_NAME);
 
  gtk_tree_selection_set_mode(gtk_tree_view_get_selection(GTK_TREE_VIEW(d->tree)), GTK_SELECTION_MULTIPLE);
  gtk_tree_view_set_model(GTK_TREE_VIEW(d->tree), GTK_TREE_MODEL(treestore));
  g_object_unref(treestore);
 
  gtk_widget_set_tooltip_text(GTK_WIDGET(d->tree), _("available styles,\ndoubleclick to apply"));
  g_signal_connect(d->tree, "row-activated", G_CALLBACK(_styles_row_activated_callback), d);
  g_signal_connect(gtk_tree_view_get_selection(GTK_TREE_VIEW(d->tree)), "changed", G_CALLBACK(_tree_selection_changed), self);
 
  /* filter entry */
  w = gtk_entry_new();
  d->entry = GTK_ENTRY(w);
  gtk_entry_set_placeholder_text(GTK_ENTRY(d->entry), _("filter style names"));
  gtk_widget_set_tooltip_text(w, _("filter style names"));
  gtk_entry_set_width_chars(GTK_ENTRY(w), 0);
  g_signal_connect(d->entry, "changed", G_CALLBACK(entry_callback), d);
  g_signal_connect(d->entry, "activate", G_CALLBACK(entry_activated), d);
 
 
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->entry), TRUE, TRUE, 0);
  GtkWidget *style_tree_sw = dt_ui_scroll_wrap(GTK_WIDGET(d->tree), 250, "plugins/lighttable/style/windowheight",
                                               DT_UI_RESIZE_DYNAMIC);
  gtk_box_pack_start(GTK_BOX(self->widget), style_tree_sw, FALSE, FALSE, 0);
 
  d->duplicate = gtk_check_button_new_with_label(_("create duplicate"));
  gtk_label_set_ellipsize(GTK_LABEL(gtk_bin_get_child(GTK_BIN(d->duplicate))), PANGO_ELLIPSIZE_START);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(d->duplicate), TRUE, FALSE, 0);
  g_signal_connect(d->duplicate, "toggled", G_CALLBACK(duplicate_callback), d);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(d->duplicate),
                               dt_conf_get_bool("ui_last/styles_create_duplicate"));
  gtk_widget_set_tooltip_text(d->duplicate, _("creates a duplicate of the image before applying style"));
 
  GtkWidget *hbox1 = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  GtkWidget *hbox2 = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  GtkWidget *hbox3 = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, DT_GUI_BOX_SPACING);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(hbox1), TRUE, FALSE, 0);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(hbox2), TRUE, FALSE, 0);
  gtk_box_pack_start(GTK_BOX(self->widget), GTK_WIDGET(hbox3), TRUE, FALSE, 0);
 
  // create
  d->create_button = dt_action_button_new(self, N_("create..."), create_clicked, d, _("create styles from history stack of selected images"), 0, 0);
  gtk_box_pack_start(GTK_BOX(hbox1), d->create_button, TRUE, TRUE, 0);
 
  // edit
  d->edit_button = dt_action_button_new(self, N_("edit..."), edit_clicked, d, _("edit the selected styles in list above"), 0, 0);
  gtk_box_pack_start(GTK_BOX(hbox1), d->edit_button, TRUE, TRUE, 0);
 
  // delete
  d->delete_button = dt_action_button_new(self, N_("remove"), delete_clicked, d, _("removes the selected styles in list above"), 0, 0);
  gtk_box_pack_start(GTK_BOX(hbox1), d->delete_button, TRUE, TRUE, 0);
 
  // import button
  d->import_button = dt_action_button_new(self, N_("import..."), import_clicked, d, _("import styles from a style files"), 0, 0);
  gtk_box_pack_start(GTK_BOX(hbox2), d->import_button, TRUE, TRUE, 0);
 
  // export button
  d->export_button = dt_action_button_new(self, N_("export..."), export_clicked, d, _("export the selected styles into a style files"), 0, 0);
  gtk_box_pack_start(GTK_BOX(hbox2), d->export_button, TRUE, TRUE, 0);
 
  // apply button
  d->apply_button = dt_action_button_new(self, N_("apply"), apply_clicked, d, _("apply the selected styles in list above to selected images"), 0, 0);
  gtk_box_pack_start(GTK_BOX(hbox3), d->apply_button, TRUE, TRUE, 0);
 
  // add entry completion
  GtkEntryCompletion *completion = gtk_entry_completion_new();
  gtk_entry_completion_set_model(completion, gtk_tree_view_get_model(GTK_TREE_VIEW(d->tree)));
  gtk_entry_completion_set_text_column(completion, 0);
  gtk_entry_completion_set_inline_completion(completion, TRUE);
  gtk_entry_set_completion(d->entry, completion);
 
  /* update filtered list */
  _gui_styles_update_view(d);
 
  DT_DEBUG_CONTROL_SIGNAL_CONNECT(dt_control_signal_get_global(), DT_SIGNAL_STYLE_CHANGED, G_CALLBACK(_styles_changed_callback), self);
 
  DT_DEBUG_CONTROL_SIGNAL_CONNECT(dt_control_signal_get_global(), DT_SIGNAL_SELECTION_CHANGED,
                            G_CALLBACK(_image_selection_changed_callback), self);
  DT_DEBUG_CONTROL_SIGNAL_CONNECT(dt_control_signal_get_global(), DT_SIGNAL_MOUSE_OVER_IMAGE_CHANGE,
                            G_CALLBACK(_mouse_over_image_callback), self);
  DT_DEBUG_CONTROL_SIGNAL_CONNECT(dt_control_signal_get_global(), DT_SIGNAL_COLLECTION_CHANGED,
                            G_CALLBACK(_collection_updated_callback), self);
 
  _update(self);
}
 
void gui_cleanup(dt_lib_module_t *self)
{
  if(IS_NULL_PTR(self->data)) return;
  dt_lib_cancel_postponed_update(self);
 
  DT_DEBUG_CONTROL_SIGNAL_DISCONNECT(dt_control_signal_get_global(), G_CALLBACK(_styles_changed_callback), self);
  DT_DEBUG_CONTROL_SIGNAL_DISCONNECT(dt_control_signal_get_global(), G_CALLBACK(_image_selection_changed_callback), self);
  DT_DEBUG_CONTROL_SIGNAL_DISCONNECT(dt_control_signal_get_global(), G_CALLBACK(_mouse_over_image_callback), self);
  DT_DEBUG_CONTROL_SIGNAL_DISCONNECT(dt_control_signal_get_global(), G_CALLBACK(_collection_updated_callback), self);
 
  dt_free(self->data);
}
 
void gui_reset(dt_lib_module_t *self)
{
  dt_database_start_transaction();
 
  GList *all_styles = dt_styles_get_list("");
 
  if(IS_NULL_PTR(all_styles))
  {
    dt_database_release_transaction();
    return;
  }
 
  const gint styles_cnt = g_list_length(all_styles);
  const gboolean can_delete = _ask_before_delete_style(styles_cnt);
 
  if(can_delete)
  {
    for (const GList *result = all_styles; result; result = g_list_next(result))
    {
      dt_style_t *style = (dt_style_t *)result->data;
      dt_styles_delete_by_name_adv((char*)style->name, FALSE);
    }
    DT_DEBUG_CONTROL_SIGNAL_RAISE(dt_control_signal_get_global(), DT_SIGNAL_STYLE_CHANGED);
  }
  g_list_free_full(all_styles, dt_style_free);
  all_styles = NULL;
  dt_database_release_transaction();
  _update(self);
}
 
 
// clang-format off
// modelines: These editor modelines have been set for all relevant files by tools/update_modelines.py
// vim: shiftwidth=2 expandtab tabstop=2 cindent
// kate: tab-indents: off; indent-width 2; replace-tabs on; indent-mode cstyle; remove-trailing-spaces modified;
// clang-format on