Lots of work on style sheet mechanism

1 files changed, 263 insertions, 4 deletions

diff --git a/src/stylesheet.c b/src/stylesheet.c
index b1cc6ed..5339067 100644
--- a/src/stylesheet.c
+++ b/src/stylesheet.c
@@ -29,6 +29,7 @@
 #include <string.h>
 #include <gtk/gtk.h>
 #include <assert.h>
+#include <libconfig.h>
 
 #include "presentation.h"
 #include "stylesheet.h"
@@ -36,11 +37,46 @@
 
 struct _stylesheetwindow
 {
-	struct presentation *p;
+	struct presentation *p;  /* Presentation to update when user alters
+	                          * something in this window */
 	GtkWidget           *window;
+	StyleSheet          *ss; /* Style sheet this window corresponds to */
+
+	GtkWidget           *fixed_font;
+
+	struct fixed_text_style *cur_fixed_style;
 };
 
 
+struct fixed_text_style
+{
+	char *name;
+	char *font;
+};
+
+
+struct text_style
+{
+	char *name;
+	char *font;
+};
+
+
+struct _stylesheet
+{
+	/* Fixed text styles */
+	struct fixed_text_style **fixed_text_styles;
+	int                 n_fixed_text_styles;
+
+	/* Normal text styles */
+	struct text_style **text_styles;
+	int                 n_text_styles;
+
+	/* Background stuff */
+
+	/* Image styles */
+};
+
 static void do_text(struct _stylesheetwindow *s, GtkWidget *b)
 {
 	GtkWidget *table;
@@ -50,6 +86,7 @@ static void do_text(struct _stylesheetwindow *s, GtkWidget *b)
 	GtkWidget *combo;
 	GtkWidget *font;
 	GtkWidget *colour;
+	int i;
 
 	table = gtk_table_new(4, 2, FALSE);
 	gtk_box_pack_start(GTK_BOX(b), table, TRUE, TRUE, 5);
@@ -61,9 +98,13 @@ static void do_text(struct _stylesheetwindow *s, GtkWidget *b)
 	gtk_table_attach_defaults(GTK_TABLE(table), label, 0, 1, 0, 1);
 	combo = gtk_combo_box_new_text();
 	gtk_table_attach_defaults(GTK_TABLE(table), combo, 1, 2, 0, 1);
-	gtk_combo_box_append_text(GTK_COMBO_BOX(combo), "Running text");
-	gtk_combo_box_append_text(GTK_COMBO_BOX(combo), "Label");
-	gtk_combo_box_append_text(GTK_COMBO_BOX(combo), "Slide title");
+
+	for ( i=0; i<s->ss->n_text_styles; i++ ) {
+
+		gtk_combo_box_append_text(GTK_COMBO_BOX(combo),
+		                          s->ss->text_styles[i]->name);
+
+	}
 	gtk_combo_box_set_active(GTK_COMBO_BOX(combo), 0);
 	gtk_widget_set_size_request(GTK_WIDGET(combo), 300, -1);
 
@@ -90,6 +131,88 @@ static void do_text(struct _stylesheetwindow *s, GtkWidget *b)
 }
 
 
+static void fixed_text_changed_sig(GtkComboBox *combo,
+                                   struct _stylesheetwindow *s)
+{
+	int n;
+
+	n = gtk_combo_box_get_active(GTK_COMBO_BOX(combo));
+	s->cur_fixed_style = s->ss->fixed_text_styles[n];
+
+	gtk_font_button_set_font_name(GTK_FONT_BUTTON(s->fixed_font),
+	                              s->cur_fixed_style->font);
+}
+
+
+static void fixed_font_set_sig(GtkFontButton *widget,
+                               struct _stylesheetwindow *s)
+{
+	const gchar *font;
+
+	font = gtk_font_button_get_font_name(widget);
+	free(s->cur_fixed_style->font);
+	s->cur_fixed_style->font = strdup(font);
+}
+
+
+static void do_fixed_text(struct _stylesheetwindow *s, GtkWidget *b)
+{
+	GtkWidget *table;
+	GtkWidget *box;
+	GtkWidget *line;
+	GtkWidget *label;
+	GtkWidget *combo;
+	GtkWidget *colour;
+	int i;
+
+	table = gtk_table_new(4, 2, FALSE);
+	gtk_box_pack_start(GTK_BOX(b), table, TRUE, TRUE, 5);
+	gtk_table_set_row_spacings(GTK_TABLE(table), 5.0);
+	gtk_table_set_col_spacings(GTK_TABLE(table), 5.0);
+
+	label = gtk_label_new("Style:");
+	gtk_misc_set_alignment(GTK_MISC(label), 1.0, 0.5);
+	gtk_table_attach_defaults(GTK_TABLE(table), label, 0, 1, 0, 1);
+	combo = gtk_combo_box_new_text();
+	gtk_table_attach_defaults(GTK_TABLE(table), combo, 1, 2, 0, 1);
+
+	for ( i=0; i<s->ss->n_fixed_text_styles; i++ ) {
+		gtk_combo_box_append_text(GTK_COMBO_BOX(combo),
+		                          s->ss->fixed_text_styles[i]->name);
+	}
+	gtk_combo_box_set_active(GTK_COMBO_BOX(combo), 0);
+	gtk_widget_set_size_request(GTK_WIDGET(combo), 300, -1);
+	g_signal_connect(G_OBJECT(combo), "changed",
+	                 G_CALLBACK(fixed_text_changed_sig), s);
+
+	line = gtk_hseparator_new();
+	gtk_table_attach_defaults(GTK_TABLE(table), line, 0, 4, 1, 2);
+	gtk_table_set_row_spacing(GTK_TABLE(table), 0, 10);
+	gtk_table_set_row_spacing(GTK_TABLE(table), 1, 10);
+
+	label = gtk_label_new("Font:");
+	gtk_misc_set_alignment(GTK_MISC(label), 1.0, 0.5);
+	gtk_table_attach_defaults(GTK_TABLE(table), label, 0, 1, 2, 3);
+	s->fixed_font = gtk_font_button_new_with_font("Sans 12");
+	box = gtk_hbox_new(FALSE, 0);
+	gtk_table_attach_defaults(GTK_TABLE(table), box, 1, 2, 2, 3);
+	gtk_box_pack_start(GTK_BOX(box), s->fixed_font, FALSE, FALSE, 0);
+	g_signal_connect(G_OBJECT(s->fixed_font), "font-set",
+	                 G_CALLBACK(fixed_font_set_sig), s);
+
+	label = gtk_label_new("Colour:");
+	gtk_misc_set_alignment(GTK_MISC(label), 1.0, 0.5);
+	gtk_table_attach_defaults(GTK_TABLE(table), label, 0, 1, 3, 4);
+	colour = gtk_color_button_new();
+	box = gtk_hbox_new(FALSE, 0);
+	gtk_table_attach_defaults(GTK_TABLE(table), box, 1, 2, 3, 4);
+	gtk_box_pack_start(GTK_BOX(box), colour, FALSE, FALSE, 0);
+
+	/* Force first update */
+	fixed_text_changed_sig(GTK_COMBO_BOX(combo), s);
+}
+
+
 static gint destroy_stylesheet_sig(GtkWidget *w, struct _stylesheetwindow *s)
 {
 	s->p->stylesheetwindow = NULL;
@@ -98,6 +221,134 @@ static gint destroy_stylesheet_sig(GtkWidget *w, struct _stylesheetwindow *s)
 }
 
 
+static void add_fixed_text_style(StyleSheet *ss, struct fixed_text_style *st)
+{
+	int n = ss->n_fixed_text_styles;
+	ss->fixed_text_styles = realloc(ss->fixed_text_styles,
+	                                (n+1)*sizeof(st));
+
+	ss->fixed_text_styles[n] = st;
+
+	ss->n_fixed_text_styles = n+1;
+}
+
+
+static struct fixed_text_style *new_fixed_text_style(const char *name)
+{
+	struct fixed_text_style *st;
+
+	st = malloc(sizeof(*st));
+	if ( st == NULL ) return NULL;
+
+	st->name = strdup(name);
+
+	return st;
+}
+
+
+static void add_text_style(StyleSheet *ss, struct text_style *st)
+{
+	int n = ss->n_text_styles;
+	ss->text_styles = realloc(ss->text_styles, (n+1)*sizeof(st));
+
+	ss->text_styles[n] = st;
+
+	ss->n_text_styles = n+1;
+}
+
+
+static struct text_style *new_text_style(const char *name)
+{
+	struct text_style *st;
+
+	st = malloc(sizeof(*st));
+	if ( st == NULL ) return NULL;
+
+	st->name = strdup(name);
+
+	return st;
+}
+
+
+static void default_stylesheet(StyleSheet *ss)
+{
+	struct fixed_text_style *st;
+	struct text_style *nst;
+
+	st = new_fixed_text_style("Slide title");
+	st->font = strdup("Sans 40");
+	add_fixed_text_style(ss, st);
+
+	st = new_fixed_text_style("Presentation title");
+	st->font = strdup("Sans 50");
+	add_fixed_text_style(ss, st);
+
+	st = new_fixed_text_style("Presentation author");
+	st->font = strdup("Sans 30");
+	add_fixed_text_style(ss, st);
+
+	nst = new_text_style("Running text");
+	nst->font = strdup("Sans 14");
+	add_text_style(ss, nst);
+}
+
+
+StyleSheet *new_stylesheet()
+{
+	StyleSheet *ss;
+
+	ss = calloc(1, sizeof(struct _stylesheet));
+	if ( ss == NULL ) return NULL;
+
+	ss->n_text_styles = 0;
+	ss->text_styles = NULL;
+	ss->n_fixed_text_styles = 0;
+	ss->fixed_text_styles = NULL;
+	default_stylesheet(ss);
+
+	return ss;
+}
+
+
+void save_stylesheet(StyleSheet *ss, const char *filename)
+{
+	config_t config;
+
+	config_init(&config);
+
+	if ( config_write_file(&config, filename) == CONFIG_FALSE ) {
+		printf("Couldn't save style sheet to '%s'\n", filename);
+	}
+	config_destroy(&config);
+}
+
+
+StyleSheet *load_stylesheet(const char *filename)
+{
+	StyleSheet *ss;
+	config_t config;
+
+	ss = new_stylesheet();
+	if ( ss == NULL ) return NULL;
+
+	config_init(&config);
+	if ( config_read_file(&config, filename) != CONFIG_TRUE ) {
+		printf("Style sheet parse error: %s at line %i.\n",
+		        config_error_text(&config),
+		        config_error_line(&config));
+		config_destroy(&config);
+		default_stylesheet(ss);
+		return ss;
+	}
+
+
+
+	config_destroy(&config);
+
+	return ss;
+}
+
+
 StylesheetWindow *open_stylesheet(struct presentation *p)
 {
 	struct _stylesheetwindow *s;
@@ -109,6 +360,8 @@ StylesheetWindow *open_stylesheet(struct presentation *p)
 	if ( s == NULL ) return NULL;
 
 	s->p = p;
+	s->ss = p->ss;
+	s->cur_fixed_style = NULL;
 
 	s->window = gtk_dialog_new_with_buttons("Stylesheet",
 	                                   GTK_WINDOW(p->window), 0,
@@ -124,6 +377,12 @@ StylesheetWindow *open_stylesheet(struct presentation *p)
 	text_box = gtk_vbox_new(FALSE, 0);
 	gtk_container_set_border_width(GTK_CONTAINER(text_box), 12);
 	gtk_notebook_append_page(GTK_NOTEBOOK(nb), text_box,
+	                         gtk_label_new("Fixed text"));
+	do_fixed_text(s, text_box);
+
+	text_box = gtk_vbox_new(FALSE, 0);
+	gtk_container_set_border_width(GTK_CONTAINER(text_box), 12);
+	gtk_notebook_append_page(GTK_NOTEBOOK(nb), text_box,
 	                         gtk_label_new("Text"));
 	do_text(s, text_box);