Attachment 8821 Details for Bug 20036 – Test demo application that illustrates the problem

Test demo application that illustrates the problem

demo.c (text/x-csrc), 2.28 KB, created by Juergen Harms on 2016-12-28 12:29:17 CET

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Creator: Juergen Harms

Created: 2016-12-28 12:29:17 CET

Size: 2.28 KB

patch

obsolete

>#include <gtk/gtk.h>
>#include <string.h>
>
>#define	MAX_SEEN	30
>
>/*	Gtk3 textview error demo
>    ------------------------ 
>
>	The application aborts when the pointer enters a line of the textview-panel
>	that contains invisible text (marked by a trailing '#' character):
>
>(demo:30090): Gtk-WARNING **: gtktextbtree.c:4041: byte index off the end of the line
>(demo:30090): Gtk-ERROR **: Byte index 44 is off the end of the line
>
>	Compile/bind/run with:	
>	gcc `pkg-config --cflags gtk+-3.0` -o demo demo.c `pkg-config --libs gtk+-3.0` ; demo
>*/
>
>static void activate (
>	GtkApplication	*app,
>	gpointer		user_data )
>{	
>	GtkWidget		*window;
>	GtkTextView		*text_panel;
>	GtkTextBuffer	*x_bf;
>	GtkTextIter		x_iter;
>	GtkTextTag		*hide_tag;
>
>	int				ii;
>	char			*x_data[] = { "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
>								  "ABCDEFGHIJKLMNOPQRSTUVWXYZ123456789",
>								  "ABCDEFGHIJKLM",
>								  NULL };
>	
>	window = gtk_application_window_new (app);
>	gtk_window_set_title ( GTK_WINDOW (window), "Window" );
>	gtk_window_set_default_size ( GTK_WINDOW (window), 400, 100 );
>
>	text_panel = (GtkTextView *)gtk_text_view_new ();
>	gtk_container_add ( GTK_CONTAINER (window), (GtkWidget *)text_panel );
>	gtk_text_view_set_pixels_below_lines ( text_panel, 2 ); /*###########*/
>
>	x_bf = gtk_text_view_get_buffer ( text_panel );
>	gtk_text_buffer_get_start_iter ( x_bf, &x_iter );
>	hide_tag = gtk_text_buffer_create_tag ( x_bf, NULL, "invisible", 1, NULL );
>							 
>	ii = 0;
>	while (1) {
>		char		*x_pnt;
>		int			x_length;
>
>		x_pnt = x_data[ii++];
>		if ( x_pnt == NULL ) { break; }
>		x_length = strlen (x_pnt);
>		if ( x_length < MAX_SEEN ) {
>			gtk_text_buffer_insert ( x_bf, &x_iter, x_pnt, -1 );
>		} else {
>			gtk_text_buffer_insert ( x_bf, &x_iter, x_pnt, MAX_SEEN );
>			gtk_text_buffer_insert_with_tags ( x_bf, &x_iter,
>										&x_pnt[MAX_SEEN], -1, hide_tag, NULL );
>			gtk_text_buffer_insert ( x_bf, &x_iter, " # ", -1 );
>		}
>		gtk_text_buffer_insert ( x_bf, &x_iter, "\n", -1 );
>	}
>	gtk_widget_show_all ( window );
>}
>
>int main (
>	int				argc,
>	char			**argv )
>{
>	GtkApplication	*app;
>	int				status;
>
>	app = gtk_application_new ( "org.gtk.example", G_APPLICATION_FLAGS_NONE );
>	g_signal_connect ( app, "activate", G_CALLBACK (activate), NULL );
>	status = g_application_run ( G_APPLICATION (app), argc, argv );
>	g_object_unref (app);
>
>	return status;
>}

#include <gtk/gtk.h>
#include <string.h>

#define	MAX_SEEN	30

/*	Gtk3 textview error demo
    ------------------------ 

	The application aborts when the pointer enters a line of the textview-panel
	that contains invisible text (marked by a trailing '#' character):

(demo:30090): Gtk-WARNING **: gtktextbtree.c:4041: byte index off the end of the line
(demo:30090): Gtk-ERROR **: Byte index 44 is off the end of the line

	Compile/bind/run with:	
	gcc `pkg-config --cflags gtk+-3.0` -o demo demo.c `pkg-config --libs gtk+-3.0` ; demo
*/

static void activate (
	GtkApplication	*app,
	gpointer		user_data )
{	
	GtkWidget		*window;
	GtkTextView		*text_panel;
	GtkTextBuffer	*x_bf;
	GtkTextIter		x_iter;
	GtkTextTag		*hide_tag;

	int				ii;
	char			*x_data[] = { "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
								  "ABCDEFGHIJKLMNOPQRSTUVWXYZ123456789",
								  "ABCDEFGHIJKLM",
								  NULL };
	
	window = gtk_application_window_new (app);
	gtk_window_set_title ( GTK_WINDOW (window), "Window" );
	gtk_window_set_default_size ( GTK_WINDOW (window), 400, 100 );

	text_panel = (GtkTextView *)gtk_text_view_new ();
	gtk_container_add ( GTK_CONTAINER (window), (GtkWidget *)text_panel );
	gtk_text_view_set_pixels_below_lines ( text_panel, 2 ); /*###########*/

	x_bf = gtk_text_view_get_buffer ( text_panel );
	gtk_text_buffer_get_start_iter ( x_bf, &x_iter );
	hide_tag = gtk_text_buffer_create_tag ( x_bf, NULL, "invisible", 1, NULL );
							 
	ii = 0;
	while (1) {
		char		*x_pnt;
		int			x_length;

		x_pnt = x_data[ii++];
		if ( x_pnt == NULL ) { break; }
		x_length = strlen (x_pnt);
		if ( x_length < MAX_SEEN ) {
			gtk_text_buffer_insert ( x_bf, &x_iter, x_pnt, -1 );
		} else {
			gtk_text_buffer_insert ( x_bf, &x_iter, x_pnt, MAX_SEEN );
			gtk_text_buffer_insert_with_tags ( x_bf, &x_iter,
										&x_pnt[MAX_SEEN], -1, hide_tag, NULL );
			gtk_text_buffer_insert ( x_bf, &x_iter, " # ", -1 );
		}
		gtk_text_buffer_insert ( x_bf, &x_iter, "\n", -1 );
	}
	gtk_widget_show_all ( window );
}

int main (
	int				argc,
	char			**argv )
{
	GtkApplication	*app;
	int				status;

	app = gtk_application_new ( "org.gtk.example", G_APPLICATION_FLAGS_NONE );
	g_signal_connect ( app, "activate", G_CALLBACK (activate), NULL );
	status = g_application_run ( G_APPLICATION (app), argc, argv );
	g_object_unref (app);

	return status;
}

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Attachments on bug 20036: 8821