implemented "format" file and expression parsing as well as application to the transcript

 * "formats" are regular expressions encapsulated in Pango markup that allow the description of powerful highlighting rules
 * highlight as you type via entry boxes
 * loading from files implemented and tested but cannot yet be done via the UI
 * transcript widget is built as libtool convenience library
 * some renamings were necessary
 * install transcript widget header

6 files changed, 362 insertions, 77 deletions

diff --git a/lib/gtk-experiment-widgets/Makefile.am b/lib/gtk-experiment-widgets/Makefile.am
index ab05c9a..57390db 100644
--- a/lib/gtk-experiment-widgets/Makefile.am
+++ b/lib/gtk-experiment-widgets/Makefile.am
@@ -2,18 +2,26 @@ AM_CFLAGS = -Wall
 
 BUILT_SOURCES = cclosure-marshallers.c cclosure-marshallers.h
 
+noinst_LTLIBRARIES = libgtk-experiment-transcript.la
+libgtk_experiment_transcript_la_SOURCES = gtk-experiment-transcript.h \
+					  gtk-experiment-transcript-private.h \
+					  gtk-experiment-transcript.c \
+					  gtk-experiment-transcript-formats.c
+
+libgtk_experiment_transcript_la_CFLAGS = $(AM_CFLAGS) \
+					 @LIBGTK_CFLAGS@
+libgtk_experiment_transcript_la_CPPFLAGS = -I@top_srcdir@/lib/experiment-reader
+
 lib_LTLIBRARIES = libgtk-experiment-widgets.la
-libgtk_experiment_widgets_la_SOURCES = gtk-experiment-navigator.c \
-				       gtk-experiment-navigator.h \
-				       gtk-experiment-transcript.c \
-				       gtk-experiment-transcript.h
+libgtk_experiment_widgets_la_SOURCES = gtk-experiment-navigator.h \
+				       gtk-experiment-navigator.c
 nodist_libgtk_experiment_widgets_la_SOURCES = $(BUILT_SOURCES)
 
 libgtk_experiment_widgets_la_CFLAGS = $(AM_CFLAGS)
 libgtk_experiment_widgets_la_CPPFLAGS =
 libgtk_experiment_widgets_la_LDFLAGS = -no-undefined -shared -bindir @bindir@ \
 				       -avoid-version
-libgtk_experiment_widgets_la_LIBADD =
+libgtk_experiment_widgets_la_LIBADD = libgtk-experiment-transcript.la
 
 libgtk_experiment_widgets_la_CFLAGS += @LIBGTK_CFLAGS@
 libgtk_experiment_widgets_la_LIBADD += @LIBGTK_LIBS@
@@ -21,14 +29,15 @@ libgtk_experiment_widgets_la_LIBADD += @LIBGTK_LIBS@
 libgtk_experiment_widgets_la_CPPFLAGS += -I@top_srcdir@/lib/experiment-reader
 libgtk_experiment_widgets_la_LIBADD += @top_srcdir@/lib/experiment-reader/libexperiment-reader.la
 
-include_HEADERS = gtk-experiment-navigator.h
+include_HEADERS = gtk-experiment-navigator.h \
+		  gtk-experiment-transcript.h
 
 dist_gtk_experiment_widgets_catalogs_DATA = gtk-experiment-widgets-catalog.xml
 
 dist_noinst_DATA = cclosure-marshallers.list
 CLEANFILES = $(BUILT_SOURCES)
 
-MARSHAL_PREFIX = gtk_experiment_navigator_marshal
+MARSHAL_PREFIX = gtk_experiment_widgets_marshal
 
 cclosure-marshallers.c : cclosure-marshallers.list
 	@GLIB_GENMARSHAL@ --prefix $(MARSHAL_PREFIX) --body $< >$@
diff --git a/lib/gtk-experiment-widgets/gtk-experiment-navigator.c b/lib/gtk-experiment-widgets/gtk-experiment-navigator.c
index fb74326..d304371 100644
--- a/lib/gtk-experiment-widgets/gtk-experiment-navigator.c
+++ b/lib/gtk-experiment-widgets/gtk-experiment-navigator.c
@@ -111,7 +111,7 @@ gtk_experiment_navigator_class_init(GtkExperimentNavigatorClass *klass)
 			     G_SIGNAL_RUN_FIRST | G_SIGNAL_ACTION,
 			     G_STRUCT_OFFSET(GtkExperimentNavigatorClass, time_selected),
 			     NULL, NULL,
-			     gtk_experiment_navigator_marshal_VOID__INT64,
+			     gtk_experiment_widgets_marshal_VOID__INT64,
 			     G_TYPE_NONE, 1, G_TYPE_INT64);
 
 	g_type_class_add_private(klass, sizeof(GtkExperimentNavigatorPrivate));
diff --git a/lib/gtk-experiment-widgets/gtk-experiment-transcript-formats.c b/lib/gtk-experiment-widgets/gtk-experiment-transcript-formats.c
new file mode 100644
index 0000000..2c6c22d
--- /dev/null
+++ b/lib/gtk-experiment-widgets/gtk-experiment-transcript-formats.c
@@ -0,0 +1,201 @@
+/**
+ * @file
+ * "Format" expression-related functions of the \e GtkExperimentTranscript
+ * widget
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#include <glib.h>
+#include <glib/gprintf.h>
+#include <glib/gstdio.h>
+
+#include <gtk/gtk.h>
+
+#include "gtk-experiment-transcript-private.h"
+
+static gboolean
+gtk_experiment_transcript_parse_format(GtkExperimentTranscriptFormat *fmt,
+				       const gchar *str)
+{
+	PangoAttrIterator *iter;
+
+	gchar *pattern, pattern_captures[255], *p;
+
+	if (!pango_parse_markup(str, -1, 0, &fmt->attribs, &pattern,
+				NULL, NULL))
+		return TRUE;
+
+	p = pattern_captures;
+	iter = pango_attr_list_get_iterator(fmt->attribs);
+	do {
+		gint start, end;
+
+		pango_attr_iterator_range(iter, &start, &end);
+
+		if (end < G_MAXINT) {
+			*p++ = '(';
+			strncpy(p, pattern + start, end - start);
+			p += end - start;
+			*p++ = ')';
+		}
+	} while (pango_attr_iterator_next(iter));
+	pango_attr_iterator_destroy(iter);
+	*p = '\0';
+	g_free(pattern);
+
+	fmt->regexp = g_regex_new(pattern_captures, G_REGEX_CASELESS, 0, NULL);
+	if (fmt->regexp == NULL) {
+		pango_attr_list_unref(fmt->attribs);
+		fmt->attribs = NULL;
+		return TRUE;
+	}
+
+	return FALSE;
+}
+
+/** @private */
+void
+gtk_experiment_transcript_apply_format(GtkExperimentTranscriptFormat *fmt,
+				       const gchar *text,
+				       PangoAttrList *attrib_list)
+{
+	GMatchInfo *match_info;
+
+	if (fmt->regexp == NULL || fmt->attribs == NULL)
+		return;
+
+	g_regex_match(fmt->regexp, text, 0, &match_info);
+
+	while (g_match_info_matches(match_info)) {
+		PangoAttrIterator *iter;
+		gint match_num = 1;
+
+		iter = pango_attr_list_get_iterator(fmt->attribs);
+		do {
+			gint start, end;
+
+			pango_attr_iterator_range(iter, &start, &end);
+			if (end == G_MAXINT)
+				continue;
+
+			start = end = -1;
+			g_match_info_fetch_pos(match_info, match_num,
+					       &start, &end);
+			if (start >= 0 && end >= 0) {
+				GSList *attribs;
+
+				attribs = pango_attr_iterator_get_attrs(iter);
+				for (GSList *cur = attribs; cur != NULL; cur = cur->next) {
+					PangoAttribute *attrib;
+
+					attrib = pango_attribute_copy((PangoAttribute *)cur->data);
+					attrib->start_index = (guint)start;
+					attrib->end_index = (guint)end;
+					pango_attr_list_change(attrib_list, attrib);
+				}
+				g_slist_free(attribs);
+			}
+
+			match_num++;
+		} while (pango_attr_iterator_next(iter));
+		pango_attr_iterator_destroy(iter);
+
+		g_match_info_next(match_info, NULL);
+	}
+
+	g_match_info_free(match_info);
+}
+
+/** @private */
+void
+gtk_experiment_transcript_free_formats(GSList *formats)
+{
+	for (GSList *cur = formats; cur != NULL; cur = cur->next) {
+		GtkExperimentTranscriptFormat *fmt =
+				(GtkExperimentTranscriptFormat *)cur->data;
+
+		gtk_experiment_transcript_free_format(fmt);
+		g_free(fmt);
+	}
+
+	g_slist_free(formats);
+}
+
+/*
+ * API
+ */
+
+gboolean
+gtk_experiment_transcript_load_formats(GtkExperimentTranscript *trans,
+				       const gchar *filename)
+{
+	FILE *file;
+	gchar buf[255];
+
+	if ((file = g_fopen(filename, "r")) == NULL)
+		return TRUE;
+
+	gtk_experiment_transcript_free_formats(trans->priv->formats);
+	trans->priv->formats = NULL;
+
+	while (fgets((char *)buf, sizeof(buf)-1, file) != NULL) {
+		GtkExperimentTranscriptFormat *fmt;
+
+		g_strchug(buf);
+
+		switch (*buf) {
+		case '#':
+		case '\n':
+		case '\0':
+			continue;
+		}
+
+		fmt = g_new(GtkExperimentTranscriptFormat, 1);
+
+		if (gtk_experiment_transcript_parse_format(fmt, buf)) {
+			g_free(fmt);
+			fclose(file);
+			return TRUE;
+		}
+
+		trans->priv->formats = g_slist_prepend(trans->priv->formats, fmt);
+	}
+	trans->priv->formats = g_slist_reverse(trans->priv->formats);
+
+	fclose(file);
+
+	gtk_experiment_transcript_text_layer_redraw(trans);
+	return FALSE;
+}
+
+gboolean
+gtk_experiment_transcript_set_interactive_format(GtkExperimentTranscript *trans,
+						 const gchar *format,
+						 gboolean with_markup)
+{
+	gboolean res = TRUE;
+
+	gtk_experiment_transcript_free_format(&trans->priv->interactive_format);
+	trans->priv->interactive_format.regexp = NULL;
+	trans->priv->interactive_format.attribs = NULL;
+
+	if (format == NULL || *format == '\0') {
+		res = FALSE;
+	} else if (with_markup) {
+		res = gtk_experiment_transcript_parse_format(&trans->priv->interactive_format,
+							     format);
+	} else {
+		/** @todo !with_markup, default attributes */
+		res = TRUE;
+	}
+
+	gtk_experiment_transcript_text_layer_redraw(trans);
+	return res;
+}
diff --git a/lib/gtk-experiment-widgets/gtk-experiment-transcript-private.h b/lib/gtk-experiment-widgets/gtk-experiment-transcript-private.h
new file mode 100644
index 0000000..8dc47c1
--- /dev/null
+++ b/lib/gtk-experiment-widgets/gtk-experiment-transcript-private.h
@@ -0,0 +1,90 @@
+/**
+ * @file
+ * Private header for the \e GtkExperimentTranscript widget
+ */
+
+#ifndef __GTK_EXPERIMENT_TRANSCRIPT_PRIVATE_H
+#define __GTK_EXPERIMENT_TRANSCRIPT_PRIVATE_H
+
+#include "gtk-experiment-transcript.h"
+
+/** @private */
+#define GTK_EXPERIMENT_TRANSCRIPT_GET_PRIVATE(obj) \
+	(G_TYPE_INSTANCE_GET_PRIVATE((obj), GTK_TYPE_EXPERIMENT_TRANSCRIPT, GtkExperimentTranscriptPrivate))
+
+/** @private */
+typedef struct _GtkExperimentTranscriptFormat {
+	GRegex		*regexp;
+	PangoAttrList	*attribs;
+} GtkExperimentTranscriptFormat;
+
+/**
+ * @private
+ * Private instance attribute structure.
+ * You can access these attributes using \c klass->priv->attribute.
+ */
+struct _GtkExperimentTranscriptPrivate {
+	GtkObject	*time_adjustment;
+	gulong		time_adj_on_value_changed_id;
+
+	GdkPixmap	*layer_text;
+	PangoLayout	*layer_text_layout;
+
+	GList		*contribs;
+	GSList		*formats;
+	GtkExperimentTranscriptFormat interactive_format;
+
+	GtkWidget	*menu;		/**< Drop-down menu, doesn't have to be unreferenced manually */
+};
+
+#define DEFAULT_WIDTH		100
+#define DEFAULT_HEIGHT		200
+
+#define LAYER_TEXT_INVISIBLE	100
+
+/** @todo scale should be configurable */
+#define PX_PER_SECOND		15
+#define TIME_TO_PX(TIME)	((TIME)/(1000/PX_PER_SECOND))
+#define PX_TO_TIME(PX)		(((PX)*1000)/PX_PER_SECOND)
+
+/**
+ * @private
+ * Unreference object given by variable, but only once.
+ * Use it in \ref gtk_experiment_transcript_dispose to unreference object
+ * references in public or private instance attributes.
+ *
+ * @sa gtk_experiment_transcript_dispose
+ *
+ * @param VAR Variable to unreference
+ */
+#define GOBJECT_UNREF_SAFE(VAR) do {	\
+	if ((VAR) != NULL) {		\
+		g_object_unref(VAR);	\
+		VAR = NULL;		\
+	}				\
+} while (0)
+
+/** @private */
+void gtk_experiment_transcript_text_layer_redraw(GtkExperimentTranscript *trans);
+
+/** @private */
+void gtk_experiment_transcript_apply_format(GtkExperimentTranscriptFormat *fmt,
+					    const gchar *text,
+					    PangoAttrList *attrib_list);
+
+/** @private */
+static inline void
+gtk_experiment_transcript_free_format(GtkExperimentTranscriptFormat *format)
+{
+	if (format->regexp != NULL)
+		g_regex_unref(format->regexp);
+	if (format->attribs != NULL)
+		pango_attr_list_unref(format->attribs);
+}
+
+/** @private */
+void gtk_experiment_transcript_free_formats(GSList *formats);
+
+
+
+#endif
diff --git a/lib/gtk-experiment-widgets/gtk-experiment-transcript.c b/lib/gtk-experiment-widgets/gtk-experiment-transcript.c
index c52b80d..e5a9384 100644
--- a/lib/gtk-experiment-widgets/gtk-experiment-transcript.c
+++ b/lib/gtk-experiment-widgets/gtk-experiment-transcript.c
@@ -9,7 +9,6 @@
 #endif
 
 #include <assert.h>
-#include <inttypes.h>
 
 #include <glib.h>
 #include <glib/gprintf.h>
@@ -17,8 +16,7 @@
 #include <gtk/gtk.h>
 #include <experiment-reader.h>
 
-#include "cclosure-marshallers.h"
-#include "gtk-experiment-transcript.h"
+#include "gtk-experiment-transcript-private.h"
 
 static void gtk_experiment_transcript_class_init(GtkExperimentTranscriptClass *klass);
 static void gtk_experiment_transcript_init(GtkExperimentTranscript *klass);
@@ -38,62 +36,12 @@ static void gtk_experiment_transcript_finalize(GObject *gobject);
 
 static void time_adj_on_value_changed(GtkAdjustment *adj, gpointer user_data);
 
-static void text_layer_redraw(GtkExperimentTranscript *trans);
-
 static gboolean button_pressed(GtkWidget *widget, GdkEventButton *event);
 static void choose_font_activated(GtkWidget *widget, gpointer data);
 static void choose_fg_color_activated(GtkWidget *widget, gpointer data);
 static void choose_bg_color_activated(GtkWidget *widget, gpointer data);
 static void reverse_activated(GtkWidget *widget, gpointer data);
 
-#define DEFAULT_WIDTH		100
-#define DEFAULT_HEIGHT		200
-
-#define LAYER_TEXT_INVISIBLE	100
-
-/** @todo scale should be configurable */
-#define PX_PER_SECOND		15
-#define TIME_TO_PX(TIME)	((TIME)/(1000/PX_PER_SECOND))
-#define PX_TO_TIME(PX)		(((PX)*1000)/PX_PER_SECOND)
-
-/**
- * @private
- * Unreference object given by variable, but only once.
- * Use it in \ref gtk_experiment_transcript_dispose to unreference object
- * references in public or private instance attributes.
- *
- * @sa gtk_experiment_transcript_dispose
- *
- * @param VAR Variable to unreference
- */
-#define GOBJECT_UNREF_SAFE(VAR) do {	\
-	if ((VAR) != NULL) {		\
-		g_object_unref(VAR);	\
-		VAR = NULL;		\
-	}				\
-} while (0)
-
-/** @private */
-#define GTK_EXPERIMENT_TRANSCRIPT_GET_PRIVATE(obj) \
-	(G_TYPE_INSTANCE_GET_PRIVATE((obj), GTK_TYPE_EXPERIMENT_TRANSCRIPT, GtkExperimentTranscriptPrivate))
-
-/**
- * @private
- * Private instance attribute structure.
- * You can access these attributes using \c klass->priv->attribute.
- */
-struct _GtkExperimentTranscriptPrivate {
-	GtkObject	*time_adjustment;
-	gulong		time_adj_on_value_changed_id;
-
-	GdkPixmap	*layer_text;
-	PangoLayout	*layer_text_layout;
-
-	GList		*contribs;
-
-	GtkWidget	*menu;		/**< Drop-down menu, doesn't have to be unreferenced manually */
-};
-
 /**
  * @private
  * Will create \e gtk_experiment_transcript_get_type and set
@@ -152,6 +100,9 @@ gtk_experiment_transcript_init(GtkExperimentTranscript *klass)
 	pango_layout_set_ellipsize(klass->priv->layer_text_layout, PANGO_ELLIPSIZE_END);
 
 	klass->priv->contribs = NULL;
+	klass->priv->formats = NULL;
+	klass->priv->interactive_format.regexp = NULL;
+	klass->priv->interactive_format.attribs = NULL;
 
 	klass->priv->menu = gtk_menu_new();
 	gtk_menu_attach_to_widget(GTK_MENU(klass->priv->menu),
@@ -247,6 +198,8 @@ gtk_experiment_transcript_finalize(GObject *gobject)
 
 	g_free(trans->speaker);
 	experiment_reader_free_contributions(trans->priv->contribs);
+	gtk_experiment_transcript_free_formats(trans->priv->formats);
+	gtk_experiment_transcript_free_format(&trans->priv->interactive_format);
 
 	/* Chain up to the parent class */
 	G_OBJECT_CLASS(gtk_experiment_transcript_parent_class)->finalize(gobject);
@@ -326,7 +279,7 @@ gtk_experiment_transcript_configure(GtkWidget *widget,
 	pango_layout_set_width(trans->priv->layer_text_layout,
 			       widget->allocation.width*PANGO_SCALE);
 
-	text_layer_redraw(trans);
+	gtk_experiment_transcript_text_layer_redraw(trans);
 
 	return TRUE;
 }
@@ -349,16 +302,19 @@ gtk_experiment_transcript_expose(GtkWidget *widget, GdkEventExpose *event)
 static void
 time_adj_on_value_changed(GtkAdjustment *adj, gpointer user_data)
 {
+	GtkExperimentTranscript *trans = GTK_EXPERIMENT_TRANSCRIPT(user_data);
+
 	/**
 	 * @todo
 	 * heuristic to improve performance in the common case of advancing
 	 * time in small steps
 	 */
-	text_layer_redraw(GTK_EXPERIMENT_TRANSCRIPT(user_data));
+	gtk_experiment_transcript_text_layer_redraw(trans);
 }
 
-static void
-text_layer_redraw(GtkExperimentTranscript *trans)
+/** @private */
+void
+gtk_experiment_transcript_text_layer_redraw(GtkExperimentTranscript *trans)
 {
 	GtkWidget *widget = GTK_WIDGET(trans);
 
@@ -395,11 +351,26 @@ text_layer_redraw(GtkExperimentTranscript *trans)
 			 TIME_TO_PX(current_time - contrib->start_time);
 		int logical_height;
 
+		PangoAttrList *attrib_list;
+
 		if (y > widget->allocation.height + LAYER_TEXT_INVISIBLE)
 			continue;
 
-		/** @todo add attributes according to regexp masks and search mask */
-		pango_layout_set_attributes(trans->priv->layer_text_layout, NULL);
+		attrib_list = pango_attr_list_new();
+
+		for (GSList *cur = trans->priv->formats; cur != NULL; cur = cur->next) {
+			GtkExperimentTranscriptFormat *fmt =
+				(GtkExperimentTranscriptFormat *)cur->data;
+
+			gtk_experiment_transcript_apply_format(fmt, contrib->text,
+							       attrib_list);
+		}
+		gtk_experiment_transcript_apply_format(&trans->priv->interactive_format,
+						       contrib->text, attrib_list);
+
+		pango_layout_set_attributes(trans->priv->layer_text_layout,
+					    attrib_list);
+		pango_attr_list_unref(attrib_list);
 
 		pango_layout_set_text(trans->priv->layer_text_layout,
 				      contrib->text, -1);
@@ -436,12 +407,14 @@ static void
 choose_font_activated(GtkWidget *widget __attribute__((unused)),
 		      gpointer data)
 {
+	GtkExperimentTranscript *trans = GTK_EXPERIMENT_TRANSCRIPT(data);
+
 	GtkWidget *dialog;
 	gchar *font_name;
 
 	dialog = gtk_font_selection_dialog_new("Choose Font...");
 
-	font_name = pango_font_description_to_string(GTK_WIDGET(data)->style->font_desc);
+	font_name = pango_font_description_to_string(GTK_WIDGET(trans)->style->font_desc);
 	gtk_font_selection_dialog_set_font_name(GTK_FONT_SELECTION_DIALOG(dialog),
 						font_name);
 	g_free(font_name);
@@ -452,12 +425,12 @@ choose_font_activated(GtkWidget *widget __attribute__((unused)),
 		font_name = gtk_font_selection_dialog_get_font_name(GTK_FONT_SELECTION_DIALOG(dialog));
 		font_desc = pango_font_description_from_string(font_name);
 
-		gtk_widget_modify_font(GTK_WIDGET(data), font_desc);
+		gtk_widget_modify_font(GTK_WIDGET(trans), font_desc);
 
 		pango_font_description_free(font_desc);
 		g_free(font_name);
 
-		text_layer_redraw(GTK_EXPERIMENT_TRANSCRIPT(data));
+		gtk_experiment_transcript_text_layer_redraw(trans);
 	}
 
 	gtk_widget_destroy(dialog);
@@ -467,22 +440,25 @@ static void
 choose_fg_color_activated(GtkWidget *widget __attribute__((unused)),
 			  gpointer data)
 {
+	GtkExperimentTranscript *trans = GTK_EXPERIMENT_TRANSCRIPT(data);
+
 	GtkWidget *dialog, *colorsel;
 
 	dialog = gtk_color_selection_dialog_new("Choose Foreground Color...");
 	colorsel = gtk_color_selection_dialog_get_color_selection(GTK_COLOR_SELECTION_DIALOG(dialog));
 
 	gtk_color_selection_set_current_color(GTK_COLOR_SELECTION(colorsel),
-					      &GTK_WIDGET(data)->style->text[GTK_STATE_NORMAL]);
+					      &GTK_WIDGET(trans)->style->text[GTK_STATE_NORMAL]);
 
 	if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_OK) {
 		GdkColor color;
 
 		gtk_color_selection_get_current_color(GTK_COLOR_SELECTION(colorsel),
 						      &color);
-		gtk_widget_modify_text(GTK_WIDGET(data), GTK_STATE_NORMAL, &color);
+		gtk_widget_modify_text(GTK_WIDGET(trans),
+				       GTK_STATE_NORMAL, &color);
 
-		text_layer_redraw(GTK_EXPERIMENT_TRANSCRIPT(data));
+		gtk_experiment_transcript_text_layer_redraw(trans);
 	}
 
 	gtk_widget_destroy(dialog);
@@ -492,22 +468,25 @@ static void
 choose_bg_color_activated(GtkWidget *widget __attribute__((unused)),
 			  gpointer data)
 {
+	GtkExperimentTranscript *trans = GTK_EXPERIMENT_TRANSCRIPT(data);
+
 	GtkWidget *dialog, *colorsel;
 
 	dialog = gtk_color_selection_dialog_new("Choose Background Color...");
 	colorsel = gtk_color_selection_dialog_get_color_selection(GTK_COLOR_SELECTION_DIALOG(dialog));
 
 	gtk_color_selection_set_current_color(GTK_COLOR_SELECTION(colorsel),
-					      &GTK_WIDGET(data)->style->bg[GTK_STATE_NORMAL]);
+					      &GTK_WIDGET(trans)->style->bg[GTK_STATE_NORMAL]);
 
 	if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_OK) {
 		GdkColor color;
 
 		gtk_color_selection_get_current_color(GTK_COLOR_SELECTION(colorsel),
 						      &color);
-		gtk_widget_modify_bg(GTK_WIDGET(data), GTK_STATE_NORMAL, &color);
+		gtk_widget_modify_bg(GTK_WIDGET(trans),
+				     GTK_STATE_NORMAL, &color);
 
-		text_layer_redraw(GTK_EXPERIMENT_TRANSCRIPT(data));
+		gtk_experiment_transcript_text_layer_redraw(trans);
 	}
 
 	gtk_widget_destroy(dialog);
@@ -555,7 +534,7 @@ gtk_experiment_transcript_load(GtkExperimentTranscript *trans,
 	trans->priv->contribs =
 		experiment_reader_get_contributions_by_speaker(exp, trans->speaker);
 
-	text_layer_redraw(trans);
+	gtk_experiment_transcript_text_layer_redraw(trans);
 
 	return trans->priv->contribs == NULL;
 }
diff --git a/lib/gtk-experiment-widgets/gtk-experiment-transcript.h b/lib/gtk-experiment-widgets/gtk-experiment-transcript.h
index 3b34754..a242a57 100644
--- a/lib/gtk-experiment-widgets/gtk-experiment-transcript.h
+++ b/lib/gtk-experiment-widgets/gtk-experiment-transcript.h
@@ -68,6 +68,12 @@ gboolean gtk_experiment_transcript_load(GtkExperimentTranscript *trans,
 gboolean gtk_experiment_transcript_load_filename(GtkExperimentTranscript *trans,
 						 const gchar *filename);
 
+gboolean gtk_experiment_transcript_load_formats(GtkExperimentTranscript *trans,
+						const gchar *filename);
+gboolean gtk_experiment_transcript_set_interactive_format(GtkExperimentTranscript *trans,
+							  const gchar *format,
+							  gboolean with_markup);
+
 GtkAdjustment *gtk_experiment_transcript_get_time_adjustment(GtkExperimentTranscript *trans);
 void gtk_experiment_transcript_set_time_adjustment(GtkExperimentTranscript *trans,
 						   GtkAdjustment *adj);