rework layer selector. This commit is compilable. Layer selector is now a separate GObject

* Move layer info struct and associated functions to dedicated c/h files.
* Rename layer selector folder more generic "layer"

Besides from restructuring nothing changes

CMakeLists.txt

@@ -20,7 +20,7 @@ aux_source_directory("gds-parser" PARSER_SOURCES)
 aux_source_directory("latex-output" LATEX_SOURCES)
 aux_source_directory("cairo-output" CAIRO_SOURCES)
 aux_source_directory("trigonometric" TRIG_SOURCES)
-aux_source_directory("layer-selector" LAYER_SELECTOR_SOURCES)
+aux_source_directory("layer" LAYER_SELECTOR_SOURCES)
 set(SOURCE "main.c" "mapping-parser.c" "command-line.c" "main-window.c" "external-renderer.c")
 
 set(SOURCE

cairo-output/cairo-output.h

@@ -24,7 +24,7 @@
 #ifndef __CAIRO_OUTPUT_H__
 #define __CAIRO_OUTPUT_H__
 
-#include "../layer-selector/layer-selector.h"
+#include "../layer/layer-info.h"
 #include "../gds-parser/gds-types.h"
 
 /** @addtogroup Cairo-Renderer

command-line.c

@@ -32,6 +32,7 @@
 #include "command-line.h"
 #include "gds-parser/gds-parser.h"
 #include "mapping-parser.h"
+#include "layer/layer-info.h"
 #include "cairo-output/cairo-output.h"
 #include "latex-output/latex-output.h"
 #include "external-renderer.h"

latex-output/latex-output.h

@@ -34,7 +34,7 @@
 #include "../gds-parser/gds-types.h"
 #include <glib.h>
 #include <stdio.h>
-#include "../mapping-parser.h"
+#include "../layer/layer-info.h"
 
 #define LATEX_LINE_BUFFER_KB (10) /**< @brief Buffer for LaTeX Code line in KiB */
 

layer-selector/layer-selector-dnd.c

@@ -1,231 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2019  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter 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 GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-/*
- * Original Drag and Drop Code taken from:
- * https://gitlab.gnome.org/GNOME/gtk/blob/gtk-3-22/tests/testlist3.c
- */
-
-/**
- * @file layer-selector-dnd.c
- * @brief This file implements the drag and drop functions regarding the list box containing the layer elements
- * @author Mario Hüttel <mario.huettel@gmx.net>
- */
-
-#include "layer-selector-dnd.h"
-
-static GtkTargetEntry entries[] = {
-	{ "GTK_LIST_BOX_ROW", GTK_TARGET_SAME_APP, 0 }
-};
-
-static GtkListBoxRow *layer_selector_get_last_row (GtkListBox *list)
-{
-	int i;
-	GtkListBoxRow *row;
-
-	row = NULL;
-	for (i = 0; ; i++) {
-		GtkListBoxRow *tmp;
-		tmp = gtk_list_box_get_row_at_index(list, i);
-		if (tmp == NULL)
-			break;
-		row = tmp;
-	}
-
-	return row;
-}
-
-
-static GtkListBoxRow *layer_selector_get_row_before (GtkListBox *list, GtkListBoxRow *row)
-{
-	int pos;
-
-	pos = gtk_list_box_row_get_index (row);
-	return gtk_list_box_get_row_at_index (list, pos - 1);
-}
-
-static GtkListBoxRow *layer_selector_get_row_after (GtkListBox *list, GtkListBoxRow *row)
-{
-	int pos;
-
-	pos = gtk_list_box_row_get_index(row);
-	return gtk_list_box_get_row_at_index(list, pos + 1);
-}
-
-static void layer_selector_drag_data_received(GtkWidget *widget, GdkDragContext *context, gint x, gint y,
-					     GtkSelectionData *selection_data, guint info, guint32 time,
-					     gpointer data)
-{
-	GtkWidget *row_before, *row_after;
-	GtkWidget *row;
-	GtkWidget *source;
-	int pos;
-
-	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
-	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
-
-	g_object_set_data(G_OBJECT(widget), "row-before", NULL);
-	g_object_set_data(G_OBJECT(widget), "row-after", NULL);
-
-	if (row_before)
-		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
-	if (row_after)
-		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
-
-	row = (gpointer) *((gpointer *)gtk_selection_data_get_data(selection_data));
-	source = gtk_widget_get_ancestor(row, GTK_TYPE_LIST_BOX_ROW);
-
-	if (source == row_after)
-		return;
-
-	g_object_ref(source);
-	gtk_container_remove(GTK_CONTAINER(gtk_widget_get_parent(source)), source);
-
-	if (row_after)
-		pos = gtk_list_box_row_get_index(GTK_LIST_BOX_ROW(row_after));
-	else
-		pos = gtk_list_box_row_get_index(GTK_LIST_BOX_ROW(row_before)) + 1;
-
-	gtk_list_box_insert(GTK_LIST_BOX(widget), source, pos);
-	g_object_unref(source);
-}
-
-static gboolean layer_selector_drag_motion(GtkWidget *widget, GdkDragContext *context, int x, int y, guint time)
-{
-	GtkAllocation alloc;
-	GtkWidget *row;
-	int hover_row_y;
-	int hover_row_height;
-	GtkWidget *drag_row;
-	GtkWidget *row_before;
-	GtkWidget *row_after;
-
-	row = GTK_WIDGET(gtk_list_box_get_row_at_y(GTK_LIST_BOX(widget), y));
-
-	drag_row = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "drag-row"));
-	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
-	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
-
-	gtk_style_context_remove_class(gtk_widget_get_style_context(drag_row), "drag-hover");
-	if (row_before)
-		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
-	if (row_after)
-		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
-
-	if (row) {
-		gtk_widget_get_allocation(row, &alloc);
-		hover_row_y = alloc.y;
-		hover_row_height = alloc.height;
-
-		if (y < hover_row_y + hover_row_height/2) {
-			row_after = row;
-			row_before = GTK_WIDGET(layer_selector_get_row_before(GTK_LIST_BOX(widget), GTK_LIST_BOX_ROW(row)));
-		} else {
-			row_before = row;
-			row_after = GTK_WIDGET(layer_selector_get_row_after(GTK_LIST_BOX(widget), GTK_LIST_BOX_ROW(row)));
-		}
-	} else {
-		row_before = GTK_WIDGET(layer_selector_get_last_row(GTK_LIST_BOX(widget)));
-		row_after = NULL;
-	}
-
-	g_object_set_data(G_OBJECT(widget), "row-before", row_before);
-	g_object_set_data(G_OBJECT(widget), "row-after", row_after);
-
-	if (drag_row == row_before || drag_row == row_after) {
-		gtk_style_context_add_class(gtk_widget_get_style_context(drag_row), "drag-hover");
-		return FALSE;
-	}
-
-	if (row_before)
-		gtk_style_context_add_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
-	if (row_after)
-		gtk_style_context_add_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
-
-	return TRUE;
-}
-
-static void layer_selector_drag_leave(GtkWidget *widget, GdkDragContext *context, guint time)
-{
-	GtkWidget *drag_row;
-	GtkWidget *row_before;
-	GtkWidget *row_after;
-
-	drag_row = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "drag-row"));
-	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
-	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
-
-	gtk_style_context_remove_class(gtk_widget_get_style_context(drag_row), "drag-hover");
-	if (row_before)
-		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
-	if (row_after)
-		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
-
-}
-
-static const char *dnd_additional_css =
-  ".row:not(:first-child) { "
-  "  border-top: 1px solid alpha(gray,0.5); "
-  "  border-bottom: 1px solid transparent; "
-  "}"
-  ".row:first-child { "
-  "  border-top: 1px solid transparent; "
-  "  border-bottom: 1px solid transparent; "
-  "}"
-  ".row:last-child { "
-  "  border-top: 1px solid alpha(gray,0.5); "
-  "  border-bottom: 1px solid alpha(gray,0.5); "
-  "}"
-  ".row.drag-icon { "
-  "  background: #282828; "
-  "  border: 1px solid blue; "
-  "}"
-  ".row.drag-row { "
-  "  color: gray; "
-  "  background: alpha(gray,0.2); "
-  "}"
-  ".row.drag-row.drag-hover { "
-  "  border-top: 1px solid #4e9a06; "
-  "  border-bottom: 1px solid #4e9a06; "
-  "}"
-  ".row.drag-hover image, "
-  ".row.drag-hover label { "
-  "  color: #4e9a06; "
-  "}"
-  ".row.drag-hover-top {"
-  "  border-top: 1px solid #4e9a06; "
-  "}"
-  ".row.drag-hover-bottom {"
-  "  border-bottom: 1px solid #4e9a06; "
-  "}";
-
-void layer_selector_list_box_setup_dnd(GtkListBox *box)
-{
-	GtkCssProvider *provider;
-
-	provider = gtk_css_provider_new ();
-	gtk_css_provider_load_from_data (provider, dnd_additional_css, -1, NULL);
-	gtk_style_context_add_provider_for_screen (gdk_screen_get_default (), GTK_STYLE_PROVIDER (provider), 800);
-
-	gtk_drag_dest_set(GTK_WIDGET(box), GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_DROP, entries, 1, GDK_ACTION_MOVE);
-	g_signal_connect(box, "drag-data-received", G_CALLBACK(layer_selector_drag_data_received), NULL);
-	g_signal_connect(box, "drag-motion", G_CALLBACK(layer_selector_drag_motion), NULL);
-	g_signal_connect(box, "drag-leave", G_CALLBACK(layer_selector_drag_leave), NULL);
-
-}

layer-selector/layer-selector.c

@@ -1,456 +0,0 @@
-/*
- * GDSII-Converter
- * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
- *
- * This file is part of GDSII-Converter.
- *
- * GDSII-Converter is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * GDSII-Converter 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 GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-/**
- * @file layer-selector.c
- * @brief Implementation of the layer selector
- * @author Mario Hüttel <mario.huettel@gmx.net>
- */
-
-/**
- * @addtogroup MainApplication
- * @{
- */
-
-#include "layer-selector.h"
-#include "../gds-parser/gds-parser.h"
-#include "../widgets/layer-element.h"
-#include <glib.h>
-#include <string.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-static GtkWidget *global_load_button;
-static GtkWidget *global_save_button;
-static GtkListBox *global_list_box;
-
-void delete_layer_info_struct(struct layer_info *info)
-{
-	if (info)
-		free(info);
-}
-
-/**
- * @brief export_rendered_layer_info
- * @return new list with all info elements needed to render cells
- */
-GList *export_rendered_layer_info()
-{
-	GList *info_list = NULL;
-	LayerElement *le;
-	struct layer_info *linfo;
-	GList *row_list;
-	GList *temp;
-	int i;
-
-	row_list = gtk_container_get_children(GTK_CONTAINER(global_list_box));
-
-	/* Iterate through  widgets and add layers that shall be exported */
-	for (i = 0, temp = row_list; temp != NULL; temp = temp->next, i++) {
-
-		le = LAYER_ELEMENT(temp->data);
-
-		if (layer_element_get_export(le) == TRUE) {
-			/* Allocate new info and fill with info */
-			linfo = (struct layer_info *)malloc(sizeof(struct layer_info));
-			layer_element_get_color(le, &linfo->color);
-			linfo->layer = layer_element_get_layer(le);
-			linfo->stacked_position = i;
-			linfo->name = (char *)layer_element_get_name(le);
-
-			/* Append to list */
-			info_list = g_list_append(info_list, (gpointer)linfo);
-		}
-	}
-
-	return info_list;
-}
-
-void clear_list_box_widgets(GtkListBox *box)
-{
-	GList *list;
-	GList *temp;
-
-	list = gtk_container_get_children(GTK_CONTAINER(box));
-	for (temp = list; temp != NULL; temp = temp->next) {
-		gtk_container_remove(GTK_CONTAINER(box), GTK_WIDGET(temp->data));
-	}
-	/* Widgets are already destroyed when removed from box because they are only referenced inside the container */
-
-	g_list_free(list);
-
-	/* Deactivate buttons */
-	gtk_widget_set_sensitive(global_load_button, FALSE);
-	gtk_widget_set_sensitive(global_save_button, FALSE);
-}
-
-/**
- * @brief Check if specific layer number is present in list box
- * @param layer Layer nu,ber
- * @return TRUE if present
- */
-static gboolean check_if_layer_widget_exists(int layer) {
-	GList *list;
-	GList *temp;
-	LayerElement *widget;
-	gboolean ret = FALSE;
-
-	list = gtk_container_get_children(GTK_CONTAINER(global_list_box));
-
-	for (temp = list; temp != NULL; temp = temp->next) {
-		widget = LAYER_ELEMENT(temp->data);
-		if (layer_element_get_layer(widget) == layer) {
-			ret = TRUE;
-			break;
-		}
-	}
-
-	g_list_free(list);
-
-	return ret;
-}
-
-/**
- * @brief Analyze \p cell and append used layers to list box
- * @param listbox listbox to add layer
- * @param cell Cell to analyze
- */
-static void analyze_cell_layers(GtkListBox *listbox, struct gds_cell *cell)
-{
-	GList *graphics;
-	struct gds_graphics *gfx;
-	int layer;
-	GtkWidget *le;
-
-	for (graphics = cell->graphic_objs; graphics != NULL; graphics = graphics->next) {
-		gfx = (struct gds_graphics *)graphics->data;
-		layer = (int)gfx->layer;
-		if (check_if_layer_widget_exists(layer) == FALSE) {
-			le = layer_element_new();
-			layer_element_set_layer(LAYER_ELEMENT(le), layer);
-			gtk_list_box_insert(listbox, le, -1);
-			gtk_widget_show(le);
-		}
-	}
-}
-
-/**
- * @brief sort_func Sort callback for list box
- * @param row1
- * @param row2
- * @param unused
- * @note Do not use this function. This is an internal callback
- * @return See sort function documentation of GTK+
- */
-static gint sort_func(GtkListBoxRow *row1, GtkListBoxRow *row2, gpointer unused)
-{
-	LayerElement *le1, *le2;
-	gint ret;
-	static const enum layer_selector_sort_algo default_sort = LAYER_SELECTOR_SORT_DOWN;
-	const enum layer_selector_sort_algo *algo = (const enum layer_selector_sort_algo *)unused;
-
-	/* Assume downward sorting */
-	/* TODO: This is nasty. Find a better way */
-	if (!algo)
-		algo = &default_sort;
-
-	le1 = LAYER_ELEMENT(row1);
-	le2 = LAYER_ELEMENT(row2);
-
-	/* Determine sort fow downward sort */
-	ret = layer_element_get_layer(le1) - layer_element_get_layer(le2);
-
-	/* Change order if upward sort is requested */
-	ret *= (*algo == LAYER_SELECTOR_SORT_DOWN ? 1 : -1);
-
-	return ret;
-}
-
-void generate_layer_widgets(GtkListBox *listbox, GList *libs)
-{
-	GList *cell_list = NULL;
-	struct gds_library *lib;
-
-	global_list_box = listbox;
-
-	clear_list_box_widgets(listbox);
-
-	for (; libs != NULL; libs = libs->next) {
-		lib = (struct gds_library *)libs->data;
-		for (cell_list = lib->cells; cell_list != NULL; cell_list = cell_list->next) {
-			analyze_cell_layers(listbox, (struct gds_cell *)cell_list->data);
-		} /* For Cell List */
-	} /* For libs */
-
-	/* Sort the layers */
-	layer_selector_force_sort(LAYER_SELECTOR_SORT_DOWN);
-
-	/* Activate Buttons */
-	gtk_widget_set_sensitive(global_load_button, TRUE);
-	gtk_widget_set_sensitive(global_save_button, TRUE);
-}
-
-/**
- * @brief Find LayerElement in list with specified layer number
- * @param el_list List with elements of type LayerElement
- * @param layer Layer number
- * @return Found LayerElement. If nothing is found, NULL.
- */
-static LayerElement *find_layer_element_in_list(GList *el_list, int layer)
-{
-	LayerElement *ret = NULL;
-	for (; el_list != NULL; el_list = el_list->next) {
-		if (layer_element_get_layer(LAYER_ELEMENT(el_list->data)) == layer) {
-			ret = LAYER_ELEMENT(el_list->data);
-			break;
-		}
-	}
-	return ret;
-}
-
-/**
- * @brief Load file and apply layer definitions to listbox
- * @param file_name CSV Layer Mapping File
- */
-static void load_layer_mapping_from_file(gchar *file_name)
-{
-	GFile *file;
-	GFileInputStream *stream;
-	GDataInputStream *dstream;
-	LayerElement *le;
-	char *name;
-	gboolean export;
-	int layer;
-	GdkRGBA color;
-	int result;
-	GList *rows;
-	GList *temp;
-
-	file = g_file_new_for_path(file_name);
-	stream = g_file_read(file, NULL, NULL);
-
-	if (!stream)
-		goto destroy_file;
-
-	dstream = g_data_input_stream_new(G_INPUT_STREAM(stream));
-
-	rows = gtk_container_get_children(GTK_CONTAINER(global_list_box));
-
-	/* Reference and remove all rows from box */
-	for (temp = rows; temp != NULL; temp = temp->next) {
-		le = LAYER_ELEMENT(temp->data);
-		/* Referencing protets the widget from being deleted when removed */
-		g_object_ref(G_OBJECT(le));
-		gtk_container_remove(GTK_CONTAINER(global_list_box), GTK_WIDGET(le));
-	}
-
-	while((result = load_csv_line(dstream, &export, &name, &layer, &color)) >= 0) {
-		/* skip broken line */
-		if (result == 1)
-			continue;
-
-		/* Add rows in the same order as in file */
-		if ((le = find_layer_element_in_list(rows, layer))) {
-			gtk_list_box_insert(global_list_box, GTK_WIDGET(le), -1);
-
-			layer_element_set_color(le, &color);
-			layer_element_set_export(le, export);
-			layer_element_set_name(le, name);
-			g_free(name);
-
-			/* Dereference and remove from list */
-			g_object_unref(G_OBJECT(le));
-			rows = g_list_remove(rows, le);
-		}
-	}
-
-	/* Add remaining elements */
-	for (temp = rows; temp != NULL; temp = temp->next) {
-		le = LAYER_ELEMENT(temp->data);
-		/* Referencing protets the widget from being deleted when removed */
-		gtk_list_box_insert(global_list_box, GTK_WIDGET(le), -1);
-		g_object_unref(G_OBJECT(le));
-	}
-
-	/* Delete list */
-	g_list_free(rows);
-
-	/* read line */
-	g_object_unref(dstream);
-	g_object_unref(stream);
-destroy_file:
-	g_object_unref(file);
-}
-
-/**
- * @brief Callback for Load Mapping Button
- * @param button
- * @param user_data
- */
-static void load_mapping_clicked(GtkWidget *button, gpointer user_data)
-{
-	GtkWidget *dialog;
-	gint res;
-	gchar *file_name;
-
-	dialog = gtk_file_chooser_dialog_new("Load Mapping File", GTK_WINDOW(user_data), GTK_FILE_CHOOSER_ACTION_OPEN,
-					     "Cancel", GTK_RESPONSE_CANCEL, "Load Mapping", GTK_RESPONSE_ACCEPT, NULL);
-	res = gtk_dialog_run(GTK_DIALOG(dialog));
-	if (res == GTK_RESPONSE_ACCEPT) {
-		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
-		load_layer_mapping_from_file(file_name);
-		g_free(file_name);
-	}
-	gtk_widget_destroy(dialog);
-}
-
-/**
- * @brief Create Line for LayerMapping file with supplied information
- * @param layer_element information
- * @param line_buffer buffer to write to
- * @param max_len Maximum length that cna be used in \p line_buffer
- */
-static void create_csv_line(LayerElement *layer_element, char *line_buffer, size_t max_len)
-{
-	int i;
-	GString *string;
-	gboolean export;
-	const gchar *name;
-	int layer;
-	GdkRGBA color;
-
-	string = g_string_new_len(NULL, max_len-1);
-
-	/* Extract values */
-	export = layer_element_get_export(layer_element);
-	name = (const gchar*)layer_element_get_name(layer_element);
-	layer = layer_element_get_layer(layer_element);
-	layer_element_get_color(layer_element, &color);
-
-	/* print values to line */
-	g_string_printf(string, "%d:%lf:%lf:%lf:%lf:%d:%s\n",
-			layer, color.red, color.green,
-			color.blue, color.alpha, (export == TRUE ? 1 : 0), name);
-	/* Fix broken locale settings */
-	for (i = 0; string->str[i]; i++) {
-		if (string->str[i] == ',')
-			string->str[i] = '.';
-	}
-
-	for (i = 0; string->str[i]; i++) {
-		if (string->str[i] == ':')
-			string->str[i] = ',';
-	}
-
-	if (string->len > (max_len-1)) {
-		printf("Layer Definition too long. Please shorten Layer Name!!\n");
-		line_buffer[0] = 0x0;
-		return;
-	}
-
-	/* copy max_len bytes of string */
-	strncpy(line_buffer, (char *)string->str, max_len-1);
-	line_buffer[max_len-1] = 0;
-
-	/* Completely remove string */
-	g_string_free(string, TRUE);
-}
-
-/**
- * @brief Save layer mapping of whole list box into file
- * @param file_name layer mapping file
- * @param list_box listbox
- */
-static void save_layer_mapping_data(const gchar *file_name, GtkListBox *list_box)
-{
-	FILE *file;
-	char workbuff[512];
-	GList *le_list;
-	GList *temp;
-
-	/* Overwrite existing file */
-	file = fopen((const char *)file_name, "w");
-
-	le_list = gtk_container_get_children(GTK_CONTAINER(list_box));
-
-	/* File format is CSV: <Layer>,<target_pos>,<R>,<G>,<B>,<Alpha>,<Export?>,<Name> */
-	for (temp = le_list; temp != NULL; temp = temp->next) {
-		/* To be sure it is a valid string */
-		workbuff[0] = 0;
-		create_csv_line(LAYER_ELEMENT(temp->data), workbuff, sizeof(workbuff));
-		fwrite(workbuff, sizeof(char), strlen(workbuff), file);
-	}
-
-	g_list_free(le_list);
-
-	/* Save File */
-	fflush(file);
-	fclose(file);
-}
-
-/**
- * @brief Callback for Save Layer Mapping Button
- * @param button
- * @param user_data
- */
-static void save_mapping_clicked(GtkWidget *button, gpointer user_data)
-{
-	GtkWidget *dialog;
-	gint res;
-	gchar *file_name;
-
-	dialog = gtk_file_chooser_dialog_new("Save Mapping File", GTK_WINDOW(user_data), GTK_FILE_CHOOSER_ACTION_SAVE,
-					     "Cancel", GTK_RESPONSE_CANCEL, "Save Mapping", GTK_RESPONSE_ACCEPT, NULL);
-	gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), TRUE);
-
-	res = gtk_dialog_run(GTK_DIALOG(dialog));
-	if (res == GTK_RESPONSE_ACCEPT) {
-		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
-		save_layer_mapping_data(file_name, global_list_box);
-		g_free(file_name);
-	}
-	gtk_widget_destroy(dialog);
-}
-
-void setup_load_mapping_callback(GtkWidget *button, GtkWindow *main_window)
-{
-	g_object_ref(G_OBJECT(button));
-	global_load_button = button;
-	g_signal_connect(button, "clicked", G_CALLBACK(load_mapping_clicked), main_window);
-}
-
-void setup_save_mapping_callback(GtkWidget *button,  GtkWindow *main_window)
-{
-	g_object_ref(G_OBJECT(button));
-	global_save_button = button;
-	g_signal_connect(button, "clicked", G_CALLBACK(save_mapping_clicked), main_window);
-}
-
-void layer_selector_force_sort(enum layer_selector_sort_algo sort_function)
-{
-	if (!global_list_box)
-		return;
-
-	/* Set dorting function, sort, and disable sorting function */
-	gtk_list_box_set_sort_func(global_list_box, sort_func, (gpointer)&sort_function, NULL);
-	gtk_list_box_invalidate_sort(global_list_box);
-	gtk_list_box_set_sort_func(global_list_box, NULL, NULL, NULL);
-}
-
-/** @} */

layer/layer-info.c

@@ -0,0 +1,9 @@
+
+
+#include "layer-info.h"
+
+void layer_info_delete_struct(struct layer_info *info)
+{
+	if (info)
+		free(info);
+}

layer/layer-info.h

@@ -0,0 +1,26 @@
+#ifndef _LAYER_INFO_H_
+#define _LAYER_INFO_H_
+
+#include <gtk/gtk.h>
+
+/**
+ * @brief Layer information.
+ *
+ * This structs contains information on how to render a layer
+ */
+struct layer_info
+{
+	int layer; /**< @brief Layer number */
+	char *name; /**< @brief Layer name */
+	int stacked_position; ///< @brief Position of layer in output @warning This parameter is not used by any renderer so far @note Lower is bottom, higher is top
+	GdkRGBA color; /**< @brief RGBA color used to render this layer */
+};
+
+/**
+ * @brief Delete a layer_info struct
+ * @param info Struct to be deleted.
+ * @note The layer_info::name Element has to be freed manually
+ */
+void layer_info_delete_struct(struct layer_info *info);
+
+#endif // _LAYER_INFO_H_

layer/layer-selector-dnd.h

@@ -28,6 +28,4 @@
 
 #include <gtk/gtk.h>
 
-void layer_selector_list_box_setup_dnd(GtkListBox *box);
-
 #endif /* _LAYER_SELECTOR_DND_H_ */

layer/layer-selector.c

@@ -0,0 +1,687 @@
+/*
+ * GDSII-Converter
+ * Copyright (C) 2018  Mario Hüttel <mario.huettel@gmx.net>
+ *
+ * This file is part of GDSII-Converter.
+ *
+ * GDSII-Converter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * GDSII-Converter 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 GDSII-Converter.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @file layer-selector.c
+ * @brief Implementation of the layer selector
+ * @author Mario Hüttel <mario.huettel@gmx.net>
+ */
+
+/**
+ * @addtogroup MainApplication
+ * @{
+ */
+
+#include "layer-selector.h"
+#include "layer-selector-dnd.h"
+#include "layer-info.h"
+#include "../gds-parser/gds-parser.h"
+#include "../widgets/layer-element.h"
+#include "../mapping-parser.h"
+#include <glib.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+struct _LayerSelector {
+	/* Parent */
+	GObject parent;
+	/* Own fields */
+	GtkWidget *associated_load_button;
+	GtkWidget *associated_save_button;
+	GtkWindow *load_parent_window;
+	GtkWindow *save_parent_window;
+	GtkListBox *list_box;
+
+	gpointer dummy[4];
+};
+
+G_DEFINE_TYPE(LayerSelector, layer_selector, G_TYPE_OBJECT)
+
+
+/* Drag and drop code */
+static GtkTargetEntry entries[] = {
+	{ "GTK_LIST_BOX_ROW", GTK_TARGET_SAME_APP, 0 }
+};
+
+static GtkListBoxRow *layer_selector_get_last_row (GtkListBox *list)
+{
+	int i;
+	GtkListBoxRow *row;
+
+	row = NULL;
+	for (i = 0; ; i++) {
+		GtkListBoxRow *tmp;
+		tmp = gtk_list_box_get_row_at_index(list, i);
+		if (tmp == NULL)
+			break;
+		row = tmp;
+	}
+
+	return row;
+}
+
+static GtkListBoxRow *layer_selector_get_row_before (GtkListBox *list, GtkListBoxRow *row)
+{
+	int pos;
+
+	pos = gtk_list_box_row_get_index (row);
+	return gtk_list_box_get_row_at_index (list, pos - 1);
+}
+
+static GtkListBoxRow *layer_selector_get_row_after (GtkListBox *list, GtkListBoxRow *row)
+{
+	int pos;
+
+	pos = gtk_list_box_row_get_index(row);
+	return gtk_list_box_get_row_at_index(list, pos + 1);
+}
+
+static void layer_selector_drag_data_received(GtkWidget *widget, GdkDragContext *context, gint x, gint y,
+					     GtkSelectionData *selection_data, guint info, guint32 time,
+					     gpointer data)
+{
+	GtkWidget *row_before, *row_after;
+	GtkWidget *row;
+	GtkWidget *source;
+	int pos;
+
+	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
+	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
+
+	g_object_set_data(G_OBJECT(widget), "row-before", NULL);
+	g_object_set_data(G_OBJECT(widget), "row-after", NULL);
+
+	if (row_before)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
+	if (row_after)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
+
+	row = (gpointer) *((gpointer *)gtk_selection_data_get_data(selection_data));
+	source = gtk_widget_get_ancestor(row, GTK_TYPE_LIST_BOX_ROW);
+
+	if (source == row_after)
+		return;
+
+	g_object_ref(source);
+	gtk_container_remove(GTK_CONTAINER(gtk_widget_get_parent(source)), source);
+
+	if (row_after)
+		pos = gtk_list_box_row_get_index(GTK_LIST_BOX_ROW(row_after));
+	else
+		pos = gtk_list_box_row_get_index(GTK_LIST_BOX_ROW(row_before)) + 1;
+
+	gtk_list_box_insert(GTK_LIST_BOX(widget), source, pos);
+	g_object_unref(source);
+}
+
+static gboolean layer_selector_drag_motion(GtkWidget *widget, GdkDragContext *context, int x, int y, guint time)
+{
+	GtkAllocation alloc;
+	GtkWidget *row;
+	int hover_row_y;
+	int hover_row_height;
+	GtkWidget *drag_row;
+	GtkWidget *row_before;
+	GtkWidget *row_after;
+
+	row = GTK_WIDGET(gtk_list_box_get_row_at_y(GTK_LIST_BOX(widget), y));
+
+	drag_row = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "drag-row"));
+	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
+	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
+
+	gtk_style_context_remove_class(gtk_widget_get_style_context(drag_row), "drag-hover");
+	if (row_before)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
+	if (row_after)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
+
+	if (row) {
+		gtk_widget_get_allocation(row, &alloc);
+		hover_row_y = alloc.y;
+		hover_row_height = alloc.height;
+
+		if (y < hover_row_y + hover_row_height/2) {
+			row_after = row;
+			row_before = GTK_WIDGET(layer_selector_get_row_before(GTK_LIST_BOX(widget), GTK_LIST_BOX_ROW(row)));
+		} else {
+			row_before = row;
+			row_after = GTK_WIDGET(layer_selector_get_row_after(GTK_LIST_BOX(widget), GTK_LIST_BOX_ROW(row)));
+		}
+	} else {
+		row_before = GTK_WIDGET(layer_selector_get_last_row(GTK_LIST_BOX(widget)));
+		row_after = NULL;
+	}
+
+	g_object_set_data(G_OBJECT(widget), "row-before", row_before);
+	g_object_set_data(G_OBJECT(widget), "row-after", row_after);
+
+	if (drag_row == row_before || drag_row == row_after) {
+		gtk_style_context_add_class(gtk_widget_get_style_context(drag_row), "drag-hover");
+		return FALSE;
+	}
+
+	if (row_before)
+		gtk_style_context_add_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
+	if (row_after)
+		gtk_style_context_add_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
+
+	return TRUE;
+}
+
+static void layer_selector_drag_leave(GtkWidget *widget, GdkDragContext *context, guint time)
+{
+	GtkWidget *drag_row;
+	GtkWidget *row_before;
+	GtkWidget *row_after;
+
+	drag_row = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "drag-row"));
+	row_before = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-before"));
+	row_after = GTK_WIDGET(g_object_get_data(G_OBJECT(widget), "row-after"));
+
+	gtk_style_context_remove_class(gtk_widget_get_style_context(drag_row), "drag-hover");
+	if (row_before)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_before), "drag-hover-bottom");
+	if (row_after)
+		gtk_style_context_remove_class(gtk_widget_get_style_context(row_after), "drag-hover-top");
+
+}
+
+static const char *dnd_additional_css =
+  ".row:not(:first-child) { "
+  "  border-top: 1px solid alpha(gray,0.5); "
+  "  border-bottom: 1px solid transparent; "
+  "}"
+  ".row:first-child { "
+  "  border-top: 1px solid transparent; "
+  "  border-bottom: 1px solid transparent; "
+  "}"
+  ".row:last-child { "
+  "  border-top: 1px solid alpha(gray,0.5); "
+  "  border-bottom: 1px solid alpha(gray,0.5); "
+  "}"
+  ".row.drag-icon { "
+  "  background: #282828; "
+  "  border: 1px solid blue; "
+  "}"
+  ".row.drag-row { "
+  "  color: gray; "
+  "  background: alpha(gray,0.2); "
+  "}"
+  ".row.drag-row.drag-hover { "
+  "  border-top: 1px solid #4e9a06; "
+  "  border-bottom: 1px solid #4e9a06; "
+  "}"
+  ".row.drag-hover image, "
+  ".row.drag-hover label { "
+  "  color: #4e9a06; "
+  "}"
+  ".row.drag-hover-top {"
+  "  border-top: 1px solid #4e9a06; "
+  "}"
+  ".row.drag-hover-bottom {"
+  "  border-bottom: 1px solid #4e9a06; "
+  "}";
+
+static void layer_selector_dispose(GObject *self)
+{
+	LayerSelector *sel = LAYER_SELECTOR(self);
+
+	g_clear_object(&sel->list_box);
+	g_clear_object(&sel->load_parent_window);
+	g_clear_object(&sel->save_parent_window);
+	g_clear_object(&sel->associated_load_button);
+	g_clear_object(&sel->associated_save_button);
+
+	/* Chain up to parent's dispose function */
+	G_OBJECT_CLASS(layer_selector_parent_class)->dispose(self);
+}
+
+static void layer_selector_class_init(LayerSelectorClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS(klass);
+	GtkCssProvider *provider;
+
+	/* Implement handles to virtual functions */
+	object_class->dispose = layer_selector_dispose;
+
+	/* Setup the CSS provider for the drag and drop animations once */
+	provider = gtk_css_provider_new();
+	gtk_css_provider_load_from_data(provider, dnd_additional_css, -1, NULL);
+	gtk_style_context_add_provider_for_screen(gdk_screen_get_default(), GTK_STYLE_PROVIDER(provider), 800);
+
+	g_object_unref(provider);
+}
+
+static void layer_selector_setup_dnd(GtkListBox *box)
+{
+	gtk_drag_dest_set(GTK_WIDGET(box), GTK_DEST_DEFAULT_MOTION | GTK_DEST_DEFAULT_DROP, entries, 1, GDK_ACTION_MOVE);
+	g_signal_connect(box, "drag-data-received", G_CALLBACK(layer_selector_drag_data_received), NULL);
+	g_signal_connect(box, "drag-motion", G_CALLBACK(layer_selector_drag_motion), NULL);
+	g_signal_connect(box, "drag-leave", G_CALLBACK(layer_selector_drag_leave), NULL);
+}
+
+/* Drag and drop end */
+
+static void layer_selector_init(LayerSelector *self)
+{
+	/* Setup drag and drop for associated list box */
+	self->load_parent_window = NULL;
+	self->save_parent_window = NULL;
+	self->associated_load_button = NULL;
+	self->associated_save_button = NULL;
+}
+
+LayerSelector *layer_selector_new(GtkListBox *list_box)
+{
+	LayerSelector *selector;
+
+	if (GTK_IS_LIST_BOX(list_box) == FALSE)
+		return NULL;
+
+	selector = LAYER_SELECTOR(g_object_new(TYPE_LAYER_SELECTOR, NULL));
+	selector->list_box = list_box;
+	layer_selector_setup_dnd(list_box);
+	g_object_ref(G_OBJECT(list_box));
+
+	return selector;
+}
+
+GList *layer_selector_export_rendered_layer_info(LayerSelector *selector)
+{
+	GList *info_list = NULL;
+	LayerElement *le;
+	struct layer_info *linfo;
+	GList *row_list;
+	GList *temp;
+	int i;
+
+	if (!selector)
+		return NULL;
+
+	row_list = gtk_container_get_children(GTK_CONTAINER(selector->list_box));
+
+	/* Iterate through  widgets and add layers that shall be exported */
+	for (i = 0, temp = row_list; temp != NULL; temp = temp->next, i++) {
+
+		le = LAYER_ELEMENT(temp->data);
+
+		if (layer_element_get_export(le) == TRUE) {
+			/* Allocate new info and fill with info */
+			linfo = (struct layer_info *)malloc(sizeof(struct layer_info));
+			layer_element_get_color(le, &linfo->color);
+			linfo->layer = layer_element_get_layer(le);
+			linfo->stacked_position = i;
+			linfo->name = (char *)layer_element_get_name(le);
+
+			/* Append to list */
+			info_list = g_list_append(info_list, (gpointer)linfo);
+		}
+	}
+
+	return info_list;
+}
+
+static void layer_selector_clear_widgets(LayerSelector *self)
+{
+	GList *list;
+	GList *temp;
+
+	list = gtk_container_get_children(GTK_CONTAINER(self->list_box));
+	for (temp = list; temp != NULL; temp = temp->next) {
+		gtk_container_remove(GTK_CONTAINER(self->list_box), GTK_WIDGET(temp->data));
+	}
+	/* Widgets are already destroyed when removed from box because they are only referenced inside the container */
+
+	g_list_free(list);
+
+	/* Deactivate buttons */
+	if (self->associated_load_button)
+		gtk_widget_set_sensitive(self->associated_load_button, FALSE);
+	if (self->associated_save_button)
+		gtk_widget_set_sensitive(self->associated_save_button, FALSE);
+}
+
+/**
+ * @brief Check if specific layer number is present in list box
+ * @param layer Layer nu,ber
+ * @return TRUE if present
+ */
+static gboolean layer_selector_check_if_layer_widget_exists(LayerSelector *self, int layer) {
+	GList *list;
+	GList *temp;
+	LayerElement *widget;
+	gboolean ret = FALSE;
+
+	list = gtk_container_get_children(GTK_CONTAINER(self->list_box));
+
+	for (temp = list; temp != NULL; temp = temp->next) {
+		widget = LAYER_ELEMENT(temp->data);
+		if (layer_element_get_layer(widget) == layer) {
+			ret = TRUE;
+			break;
+		}
+	}
+
+	g_list_free(list);
+
+	return ret;
+}
+
+/**
+ * @brief Analyze \p cell and append used layers to list box
+ * @param listbox listbox to add layer
+ * @param cell Cell to analyze
+ */
+static void layer_selector_analyze_cell_layers(LayerSelector *self, struct gds_cell *cell)
+{
+	GList *graphics;
+	struct gds_graphics *gfx;
+	int layer;
+	GtkWidget *le;
+
+	for (graphics = cell->graphic_objs; graphics != NULL; graphics = graphics->next) {
+		gfx = (struct gds_graphics *)graphics->data;
+		layer = (int)gfx->layer;
+		if (layer_selector_check_if_layer_widget_exists(self, layer) == FALSE) {
+			le = layer_element_new();
+			layer_element_set_layer(LAYER_ELEMENT(le), layer);
+			gtk_list_box_insert(self->list_box, le, -1);
+			gtk_widget_show(le);
+		}
+	}
+}
+
+/**
+ * @brief sort_func Sort callback for list box
+ * @param row1
+ * @param row2
+ * @param unused
+ * @note Do not use this function. This is an internal callback
+ * @return See sort function documentation of GTK+
+ */
+static gint layer_selector_sort_func(GtkListBoxRow *row1, GtkListBoxRow *row2, gpointer unused)
+{
+	LayerElement *le1, *le2;
+	gint ret;
+	static const enum layer_selector_sort_algo default_sort = LAYER_SELECTOR_SORT_DOWN;
+	const enum layer_selector_sort_algo *algo = (const enum layer_selector_sort_algo *)unused;
+
+	/* Assume downward sorting */
+	/* TODO: This is nasty. Find a better way */
+	if (!algo)
+		algo = &default_sort;
+
+	le1 = LAYER_ELEMENT(row1);
+	le2 = LAYER_ELEMENT(row2);
+
+	/* Determine sort fow downward sort */
+	ret = layer_element_get_layer(le1) - layer_element_get_layer(le2);
+
+	/* Change order if upward sort is requested */
+	ret *= (*algo == LAYER_SELECTOR_SORT_DOWN ? 1 : -1);
+
+	return ret;
+}
+
+void layer_selector_generate_layer_widgets(LayerSelector *selector, GList *libs)
+{
+	GList *cell_list = NULL;
+	struct gds_library *lib;
+
+	layer_selector_clear_widgets(selector);
+
+	for (; libs != NULL; libs = libs->next) {
+		lib = (struct gds_library *)libs->data;
+		for (cell_list = lib->cells; cell_list != NULL; cell_list = cell_list->next) {
+			layer_selector_analyze_cell_layers(selector, (struct gds_cell *)cell_list->data);
+		} /* For Cell List */
+	} /* For libs */
+
+	/* Sort the layers */
+	layer_selector_force_sort(selector, LAYER_SELECTOR_SORT_DOWN);
+
+	/* Activate Buttons */
+	if (selector->associated_load_button)
+		gtk_widget_set_sensitive(selector->associated_load_button, TRUE);
+	if (selector->associated_save_button)
+		gtk_widget_set_sensitive(selector->associated_save_button, TRUE);
+}
+
+/**
+ * @brief Find LayerElement in list with specified layer number
+ * @param el_list List with elements of type LayerElement
+ * @param layer Layer number
+ * @return Found LayerElement. If nothing is found, NULL.
+ */
+static LayerElement *layer_selector_find_layer_element_in_list(GList *el_list, int layer)
+{
+	LayerElement *ret = NULL;
+	for (; el_list != NULL; el_list = el_list->next) {
+		if (layer_element_get_layer(LAYER_ELEMENT(el_list->data)) == layer) {
+			ret = LAYER_ELEMENT(el_list->data);
+			break;
+		}
+	}
+	return ret;
+}
+
+/**
+ * @brief Load file and apply layer definitions to listbox
+ * @param file_name CSV Layer Mapping File
+ */
+static void layer_selector_load_layer_mapping_from_file(LayerSelector *self, gchar *file_name)
+{
+	GFile *file;
+	GFileInputStream *stream;
+	GDataInputStream *dstream;
+	LayerElement *le;
+	char *name;
+	gboolean export;
+	int layer;
+	GdkRGBA color;
+	int result;
+	GList *rows;
+	GList *temp;
+
+	file = g_file_new_for_path(file_name);
+	stream = g_file_read(file, NULL, NULL);
+
+	if (!stream)
+		goto destroy_file;
+
+	dstream = g_data_input_stream_new(G_INPUT_STREAM(stream));
+
+	rows = gtk_container_get_children(GTK_CONTAINER(self->list_box));
+
+	/* Reference and remove all rows from box */
+	for (temp = rows; temp != NULL; temp = temp->next) {
+		le = LAYER_ELEMENT(temp->data);
+		/* Referencing protets the widget from being deleted when removed */
+		g_object_ref(G_OBJECT(le));
+		gtk_container_remove(GTK_CONTAINER(self->list_box), GTK_WIDGET(le));
+	}
+
+	while((result = load_csv_line(dstream, &export, &name, &layer, &color)) >= 0) {
+		/* skip broken line */
+		if (result == 1)
+			continue;
+
+		/* Add rows in the same order as in file */
+		if ((le = layer_selector_find_layer_element_in_list(rows, layer))) {
+			gtk_list_box_insert(self->list_box, GTK_WIDGET(le), -1);
+
+			layer_element_set_color(le, &color);
+			layer_element_set_export(le, export);
+			layer_element_set_name(le, name);
+			g_free(name);
+
+			/* Dereference and remove from list */
+			g_object_unref(G_OBJECT(le));
+			rows = g_list_remove(rows, le);
+		}
+	}
+
+	/* Add remaining elements */
+	for (temp = rows; temp != NULL; temp = temp->next) {
+		le = LAYER_ELEMENT(temp->data);
+		/* Referencing protets the widget from being deleted when removed */
+		gtk_list_box_insert(self->list_box, GTK_WIDGET(le), -1);
+		g_object_unref(G_OBJECT(le));
+	}
+
+	/* Delete list */
+	g_list_free(rows);
+
+	/* read line */
+	g_object_unref(dstream);
+	g_object_unref(stream);
+destroy_file:
+	g_object_unref(file);
+}
+
+/**
+ * @brief Callback for Load Mapping Button
+ * @param button
+ * @param user_data
+ */
+static void layer_selector_load_mapping_clicked(GtkWidget *button, gpointer user_data)
+{
+	LayerSelector *sel;
+	GtkWidget *dialog;
+	gint res;
+	gchar *file_name;
+
+	sel = LAYER_SELECTOR(user_data);
+
+	dialog = gtk_file_chooser_dialog_new("Load Mapping File", GTK_WINDOW(sel->load_parent_window), GTK_FILE_CHOOSER_ACTION_OPEN,
+					     "Cancel", GTK_RESPONSE_CANCEL, "Load Mapping", GTK_RESPONSE_ACCEPT, NULL);
+	res = gtk_dialog_run(GTK_DIALOG(dialog));
+	if (res == GTK_RESPONSE_ACCEPT) {
+		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
+		layer_selector_load_layer_mapping_from_file(sel, file_name);
+		g_free(file_name);
+	}
+	gtk_widget_destroy(dialog);
+}
+
+
+
+/**
+ * @brief Save layer mapping of whole list box into file
+ * @param file_name layer mapping file
+ * @param list_box listbox
+ */
+static void layer_selector_save_layer_mapping_data(LayerSelector *self, const gchar *file_name)
+{
+	FILE *file;
+	char workbuff[512];
+	GList *le_list;
+	GList *temp;
+
+	/* Overwrite existing file */
+	file = fopen((const char *)file_name, "w");
+
+	le_list = gtk_container_get_children(GTK_CONTAINER(self->list_box));
+
+	/* File format is CSV: <Layer>,<target_pos>,<R>,<G>,<B>,<Alpha>,<Export?>,<Name> */
+	for (temp = le_list; temp != NULL; temp = temp->next) {
+		/* To be sure it is a valid string */
+		workbuff[0] = 0;
+		create_csv_line(LAYER_ELEMENT(temp->data), workbuff, sizeof(workbuff));
+		fwrite(workbuff, sizeof(char), strlen(workbuff), file);
+	}
+
+	g_list_free(le_list);
+
+	/* Save File */
+	fflush(file);
+	fclose(file);
+}
+
+/**
+ * @brief Callback for Save Layer Mapping Button
+ * @param button
+ * @param user_data
+ */
+static void layer_selector_save_mapping_clicked(GtkWidget *button, gpointer user_data)
+{
+	GtkWidget *dialog;
+	gint res;
+	gchar *file_name;
+	LayerSelector *sel;
+
+	sel = LAYER_SELECTOR(user_data);
+
+	dialog = gtk_file_chooser_dialog_new("Save Mapping File", GTK_WINDOW(sel->save_parent_window), GTK_FILE_CHOOSER_ACTION_SAVE,
+					     "Cancel", GTK_RESPONSE_CANCEL, "Save Mapping", GTK_RESPONSE_ACCEPT, NULL);
+	gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dialog), TRUE);
+
+	res = gtk_dialog_run(GTK_DIALOG(dialog));
+	if (res == GTK_RESPONSE_ACCEPT) {
+		file_name = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
+		layer_selector_save_layer_mapping_data(sel, file_name);
+		g_free(file_name);
+	}
+	gtk_widget_destroy(dialog);
+}
+
+void layer_selector_set_load_mapping_button(LayerSelector *selector, GtkWidget *button, GtkWindow *main_window)
+{
+	g_clear_object(&selector->load_parent_window);
+	g_clear_object(&selector->associated_load_button);
+
+	g_object_ref(G_OBJECT(button));
+	g_object_ref(G_OBJECT(main_window));
+	selector->associated_load_button = button;
+	selector->load_parent_window = main_window;
+	g_signal_connect(button, "clicked", G_CALLBACK(layer_selector_load_mapping_clicked), selector);
+}
+
+void layer_selector_set_save_mapping_button(LayerSelector *selector, GtkWidget *button,  GtkWindow *main_window)
+{
+	g_clear_object(&selector->save_parent_window);
+	g_clear_object(&selector->associated_save_button);
+
+	g_object_ref(G_OBJECT(button));
+	g_object_ref(G_OBJECT(main_window));
+	selector->associated_save_button = button;
+	selector->save_parent_window = main_window;
+	g_signal_connect(button, "clicked", G_CALLBACK(layer_selector_save_mapping_clicked), selector);
+}
+
+void layer_selector_force_sort(LayerSelector *selector, enum layer_selector_sort_algo sort_function)
+{
+	GtkListBox *box;
+
+	if (!selector)
+		return;
+
+	box = selector->list_box;
+	if (!box)
+		return;
+
+	/* Set dorting function, sort, and disable sorting function */
+	gtk_list_box_set_sort_func(box, layer_selector_sort_func, (gpointer)&sort_function, NULL);
+	gtk_list_box_invalidate_sort(box);
+	gtk_list_box_set_sort_func(box, NULL, NULL, NULL);
+}
+
+/** @} */

layer/layer-selector.h

@@ -28,47 +28,52 @@
 
 #include <gtk/gtk.h>
 #include <glib.h>
-#include "../mapping-parser.h"
+
+G_BEGIN_DECLS
+
+G_DECLARE_FINAL_TYPE(LayerSelector, layer_selector, LAYER, SELECTOR, GObject);
+
+#define TYPE_LAYER_SELECTOR (layer_selector_get_type())
 
 /**
  * @brief Defines how to sort the layer selector list box.
  */
 enum layer_selector_sort_algo {LAYER_SELECTOR_SORT_DOWN = 0, LAYER_SELECTOR_SORT_UP};
 
+/**
+ * @brief layer_selector_new
+ * @param list_box The associated list box, the content is displayed in
+ * @return Newly created layer selector
+ */
+LayerSelector *layer_selector_new(GtkListBox *list_box);
+
 /**
  * @brief Generate layer widgets in \p listbox
  * @note This clears all previously inserted elements
  * @param listbox
- * @param libs The library to add
+ * @param libs The libraries to add
  */
-void generate_layer_widgets(GtkListBox *listbox, GList *libs);
+void layer_selector_generate_layer_widgets(LayerSelector *selector, GList *libs);
 
 /**
  * @brief Supply button for loading the layer mapping
  * @param button
  * @param main_window Parent window for dialogs
  */
-void setup_load_mapping_callback(GtkWidget *button, GtkWindow *main_window);
+void layer_selector_set_load_mapping_button(LayerSelector *selector, GtkWidget *button, GtkWindow *main_window);
 
 /**
  * @brief Supply button for saving the layer mapping
  * @param button
- * @param main_window
+ * @param main_window Parent window for dialogs
  */
-void setup_save_mapping_callback(GtkWidget *button, GtkWindow *main_window);
+void layer_selector_set_save_mapping_button(LayerSelector *selector, GtkWidget *button, GtkWindow *main_window);
 
 /**
  * @brief get the layer information present in the listbox of the selector
  * @return List with layer_info elements
  */
-GList *export_rendered_layer_info();
-
-/**
- * @brief Delete a layer_info struct
- * @param info Struct to be deleted.
- * @note The layer_info::name Element has to be freed manually
- */
-void delete_layer_info_struct(struct layer_info *info);
+GList *layer_selector_export_rendered_layer_info(LayerSelector *selector);
 
 /**
  * @brief Force sorting of the layer selector in a specified way
@@ -77,6 +82,8 @@ void delete_layer_info_struct(struct layer_info *info);
  *
  * @param sort_function Sorting direction
  */
-void layer_selector_force_sort(enum layer_selector_sort_algo sort_function);
+void layer_selector_force_sort(LayerSelector *selector, enum layer_selector_sort_algo sort_function);
+
+G_END_DECLS
 
 #endif /* __LAYER_SELECTOR_H__ */

main-window.c

@@ -31,8 +31,8 @@
 #include <stdio.h>
 #include "gds-parser/gds-parser.h"
 #include <gtk/gtk.h>
-#include "layer-selector/layer-selector.h"
-#include "layer-selector/layer-selector-dnd.h"
+#include "layer/layer-selector.h"
+#include "layer/layer-selector-dnd.h"
 #include "tree-renderer/tree-store.h"
 #include "latex-output/latex-output.h"
 #include "widgets/conv-settings-dialog.h"
@@ -48,8 +48,8 @@ struct open_button_data {
 	GtkWindow *main_window;
 	GList **list_ptr;
 	GtkTreeStore *cell_store;
-	GtkListBox *layer_box;
 	GtkSearchEntry *search_entry;
+	LayerSelector *layer_selector;
 };
 
 /**
@@ -58,6 +58,7 @@ struct open_button_data {
 struct convert_button_data {
 	GtkTreeView *tree_view;
 	GtkWindow *main_window;
+	LayerSelector *layer_selector;
 };
 
 /**
@@ -68,8 +69,12 @@ struct convert_button_data {
  * @param user not used
  * @return TRUE. This indicates that the event has been fully handled
  */
-static gboolean on_window_close(gpointer window, gpointer user)
+static gboolean on_window_close(gpointer window, GdkEvent *event, gpointer user)
 {
+	/* Destroy all objects helb by this module, that are not part of the GUI itself */
+	g_object_unref(LAYER_SELECTOR(user));
+
+	/* Close Window. Leads to termination of the program */
 	gtk_widget_destroy(GTK_WIDGET(window));
 	return TRUE;
 }
@@ -210,7 +215,7 @@ static void on_load_gds(gpointer button, gpointer user)
 		}
 
 		/* Create Layers in Layer Box */
-		generate_layer_widgets(ptr->layer_box, *(ptr->list_ptr));
+		layer_selector_generate_layer_widgets(ptr->layer_selector, *(ptr->list_ptr));
 	}
 
 end_destroy:
@@ -259,7 +264,7 @@ static void on_convert_clicked(gpointer button, gpointer user)
 		return;
 
 	/* Get layers that are rendered */
-	layer_list = export_rendered_layer_info();
+	layer_list = layer_selector_export_rendered_layer_info(data->layer_selector);
 
 	/* Calculate cell size in DB units */
 	bounding_box_prepare_empty(&cell_box);
@@ -267,7 +272,7 @@ static void on_convert_clicked(gpointer button, gpointer user)
 
 	/* Calculate size in database units
 	 * Note that the results are bound to be positive,
-	 * so casting them to unsigned int is asbsolutely valid
+	 * so casting them to unsigned int is absolutely valid
 	 */
 	height = (unsigned int)(cell_box.vectors.upper_right.y - cell_box.vectors.lower_left.y);
 	width = (unsigned int)(cell_box.vectors.upper_right.x - cell_box.vectors.lower_left.x);
@@ -344,7 +349,7 @@ static void on_convert_clicked(gpointer button, gpointer user)
 		gtk_widget_destroy(dialog);
 	}
 ret_layer_destroy:
-	g_list_free_full(layer_list, (GDestroyNotify)delete_layer_info_struct);
+	g_list_free_full(layer_list, (GDestroyNotify)layer_info_delete_struct);
 }
 
 /**
@@ -387,17 +392,23 @@ static void cell_selection_changed(GtkTreeSelection *sel, GtkWidget *convert_but
 static void sort_up_callback(GtkWidget *widget, gpointer user)
 {
 	(void)widget;
-	(void)user;
+	LayerSelector *sel;
 
-	layer_selector_force_sort(LAYER_SELECTOR_SORT_UP);
+	sel = LAYER_SELECTOR(user);
+	if (!sel)
+		return;
+	layer_selector_force_sort(sel, LAYER_SELECTOR_SORT_UP);
 }
 
 static void sort_down_callback(GtkWidget *widget, gpointer user)
 {
 	(void)widget;
-	(void)user;
+	LayerSelector *sel;
 
-	layer_selector_force_sort(LAYER_SELECTOR_SORT_DOWN);
+	sel = LAYER_SELECTOR(user);
+	if (!sel)
+		return;
+	layer_selector_force_sort(sel, LAYER_SELECTOR_SORT_DOWN);
 }
 
 GtkWindow *create_main_window()
@@ -408,6 +419,7 @@ GtkWindow *create_main_window()
 	GtkWidget *conv_button;
 	GtkWidget *search_entry;
 	GtkHeaderBar *header_bar;
+	LayerSelector *layer_selector;
 	static GList *gds_libs;
 	static struct open_button_data open_data;
 	static struct convert_button_data conv_data;
@@ -429,10 +441,6 @@ GtkWindow *create_main_window()
 	g_signal_connect(GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-gds")),
 			 "clicked", G_CALLBACK(on_load_gds), (gpointer)&open_data);
 
-	/* Connect delete-event */
-	g_signal_connect(GTK_WIDGET(open_data.main_window), "delete-event",
-			 G_CALLBACK(on_window_close), NULL);
-
 	/* Connect Convert button */
 	conv_data.tree_view = cell_tree;
 	conv_data.main_window = open_data.main_window;
@@ -441,16 +449,10 @@ GtkWindow *create_main_window()
 	g_signal_connect(conv_button, "clicked", G_CALLBACK(on_convert_clicked), &conv_data);
 
 	listbox = GTK_WIDGET(gtk_builder_get_object(main_builder, "layer-list"));
-	/* Set up the list box sided callbacks for drag and drop */
-	layer_selector_list_box_setup_dnd(GTK_LIST_BOX(listbox));
-
-	open_data.layer_box = GTK_LIST_BOX(listbox);
-
-	/* Set buttons fpr layer mapping GUI */
-	setup_load_mapping_callback(GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-mapping")),
-				    open_data.main_window);
-	setup_save_mapping_callback(GTK_WIDGET(gtk_builder_get_object(main_builder, "button-save-mapping")),
-				    open_data.main_window);
+	/* Create layer selector */
+	layer_selector = layer_selector_new(GTK_LIST_BOX(listbox));
+	conv_data.layer_selector = layer_selector;
+	open_data.layer_selector = layer_selector;
 
 	/* Callback for selection change of cell selector */
 	g_signal_connect(G_OBJECT(gtk_tree_view_get_selection(cell_tree)), "changed",
@@ -465,8 +467,21 @@ GtkWindow *create_main_window()
 	sort_up_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-up-sort"));
 	sort_down_button = GTK_WIDGET(gtk_builder_get_object(main_builder, "button-down-sort"));
 
-	g_signal_connect(sort_up_button, "clicked", G_CALLBACK(sort_up_callback), NULL);
-	g_signal_connect(sort_down_button, "clicked", G_CALLBACK(sort_down_callback), NULL);
+	g_signal_connect(sort_up_button, "clicked", G_CALLBACK(sort_up_callback), layer_selector);
+	g_signal_connect(sort_down_button, "clicked", G_CALLBACK(sort_down_callback), layer_selector);
+
+
+	/* Set buttons for loading and saving */
+	layer_selector_set_load_mapping_button(layer_selector,
+						GTK_WIDGET(gtk_builder_get_object(main_builder, "button-load-mapping")),
+						conv_data.main_window);
+	layer_selector_set_save_mapping_button(layer_selector, GTK_WIDGET(gtk_builder_get_object(main_builder, "button-save-mapping")),
+						conv_data.main_window);
+
+
+	/* Connect delete-event */
+	g_signal_connect(GTK_WIDGET(open_data.main_window), "delete-event",
+			 G_CALLBACK(on_window_close), layer_selector);
 
 	g_object_unref(main_builder);
 

mapping-parser.c

@@ -94,5 +94,51 @@ ret_direct:
 
 }
 
+void create_csv_line(LayerElement *layer_element, char *line_buffer, size_t max_len)
+{
+	int i;
+	GString *string;
+	gboolean export;
+	const gchar *name;
+	int layer;
+	GdkRGBA color;
+
+	string = g_string_new_len(NULL, max_len-1);
+
+	/* Extract values */
+	export = layer_element_get_export(layer_element);
+	name = (const gchar*)layer_element_get_name(layer_element);
+	layer = layer_element_get_layer(layer_element);
+	layer_element_get_color(layer_element, &color);
+
+	/* print values to line */
+	g_string_printf(string, "%d:%lf:%lf:%lf:%lf:%d:%s\n",
+			layer, color.red, color.green,
+			color.blue, color.alpha, (export == TRUE ? 1 : 0), name);
+	/* Fix broken locale settings */
+	for (i = 0; string->str[i]; i++) {
+		if (string->str[i] == ',')
+			string->str[i] = '.';
+	}
+
+	for (i = 0; string->str[i]; i++) {
+		if (string->str[i] == ':')
+			string->str[i] = ',';
+	}
+
+	if (string->len > (max_len-1)) {
+		printf("Layer Definition too long. Please shorten Layer Name!!\n");
+		line_buffer[0] = 0x0;
+		return;
+	}
+
+	/* copy max_len bytes of string */
+	strncpy(line_buffer, (char *)string->str, max_len-1);
+	line_buffer[max_len-1] = 0;
+
+	/* Completely remove string */
+	g_string_free(string, TRUE);
+}
+
 /** @} */
 

mapping-parser.h

@@ -32,19 +32,7 @@
  */
 
 #include <gtk/gtk.h>
-
-/**
- * @brief Layer information.
- *
- * This structs contains information on how to render a layer
- */
-struct layer_info
-{
-	int layer; /**< @brief Layer number */
-	char *name; /**< @brief Layer name */
-	int stacked_position; ///< @brief Position of layer in output @warning This parameter is not used by any renderer so far @note Lower is bottom, higher is top
-	GdkRGBA color; /**< @brief RGBA color used to render this layer */
-};
+#include "widgets/layer-element.h"
 
 /**
  * @brief Load a line from \p stream and parse try to parse it as layer information
@@ -57,6 +45,14 @@ struct layer_info
  */
 int load_csv_line(GDataInputStream *stream, gboolean *export, char **name, int *layer, GdkRGBA *color);
 
+/**
+ * @brief Create Line for LayerMapping file with supplied information
+ * @param layer_element information
+ * @param line_buffer buffer to write to
+ * @param max_len Maximum length that cna be used in \p line_buffer
+ */
+void create_csv_line(LayerElement *layer_element, char *line_buffer, size_t max_len);
+
 /** @} */
 
 #endif /* __MAPPING_PARSER_H__ */