Fix bug #6690: Wireshark quite slow displaying frames with many detail pane nodes and large byteviews

Add custom widget to render hexdump or bitsdump.

svn path=/trunk/; revision=43728

1 files changed, 1156 insertions, 0 deletions

diff --git a/ui/gtk/bytes_view.c b/ui/gtk/bytes_view.c
new file mode 100644
index 0000000000..816fac6aa6
--- /dev/null
+++ b/ui/gtk/bytes_view.c
@@ -0,0 +1,1156 @@
+/* bytes_view.c
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * This program 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 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
+ * USA.
+ */
+
+/* Code based on:
+ *   xtext, the text widget used by X-Chat. Peter Zelezny <zed@xchat.org>.
+ *   GtkTextView. Copyright (C) 2000 Red Hat, Inc.
+ *   GtkHex. Jaka Mocnik <jaka@gnu.org>.
+ *   pango-layout.c: High-level layout driver. Copyright (C) 2000, 2001, 2006 Red Hat Software
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#undef GTK_DISABLE_DEPRECATED
+#undef GSEAL_ENABLE
+
+#include <gtk/gtk.h>
+#include "ui/gtk/old-gtk-compat.h"
+
+#include <string.h>
+
+#include "../isprint.h"
+
+#include <epan/charsets.h>
+#include <epan/packet.h>
+#include <epan/prefs.h>
+
+#include "ui/recent.h"
+
+#include "packet_panes.h"
+
+#define MARGIN 2
+#define REFRESH_TIMEOUT 10
+
+static GtkWidgetClass *parent_class = NULL;
+
+struct _BytesView
+{
+	GtkWidget widget;
+
+	PangoContext *context;
+
+	PangoFontDescription *font;
+	int font_ascent;
+	int font_descent;
+	int fontsize;
+
+	gint adj_tag;
+	GtkAdjustment *vadj;
+	GtkAdjustment *hadj;
+	int max_width;
+
+	gboolean bold_highlight;
+	int state;
+
+/* data */
+	int encoding;
+	int format;
+	guint8 *pd;
+	int len;
+/* data-highlight */
+	int start[2];
+	int end[2];
+
+	int per_line;
+	int use_digits;
+};
+
+#include "bytes_view.h"
+
+typedef struct _BytesViewClass
+{
+	GtkWidgetClass parent_class;
+
+	void (*set_scroll_adjustments)(BytesView *, GtkAdjustment *, GtkAdjustment *);
+
+} BytesViewClass;
+
+static void bytes_view_set_scroll_adjustments(BytesView *, GtkAdjustment *, GtkAdjustment *);
+static void bytes_view_adjustment_set(BytesView *);
+
+static void 
+bytes_view_init(BytesView *bv)
+{
+	bv->context = NULL;
+
+	bv->encoding = PACKET_CHAR_ENC_CHAR_ASCII;
+	bv->format = BYTES_HEX;
+
+	bv->per_line = 16;
+	bv->use_digits = 4;
+
+	bv->max_width = 0;
+}
+
+static void 
+bytes_view_destroy(GtkObject *object)
+{
+	BytesView *bv = BYTES_VIEW(object);
+
+	if (bv->pd) {
+		g_free(bv->pd);
+		bv->pd = NULL;
+	}
+	if (bv->adj_tag) {
+		g_source_remove(bv->adj_tag);
+		bv->adj_tag = 0;
+	}
+	if (bv->vadj) {
+		g_object_unref(G_OBJECT(bv->vadj));
+		bv->vadj = NULL;
+	}
+	if (bv->hadj) {
+		g_object_unref(G_OBJECT(bv->hadj));
+		bv->hadj = NULL;
+	}
+	if (bv->font) {
+		pango_font_description_free(bv->font);
+		bv->font = NULL;
+	}
+	if (bv->context) {
+		g_object_unref(bv->context);
+		bv->context = NULL;
+	}
+	if (GTK_OBJECT_CLASS(parent_class)->destroy)
+		(*GTK_OBJECT_CLASS(parent_class)->destroy)(object);
+}
+
+static void
+bytes_view_ensure_layout(BytesView *bv)
+{
+	if (bv->context == NULL) {
+		bv->context = gtk_widget_get_pango_context(GTK_WIDGET(bv));
+		g_object_ref(bv->context);
+
+		{
+		PangoLanguage *lang;
+		PangoFontMetrics *metrics;
+
+			/* vte and xchat does it this way */
+			lang = pango_context_get_language(bv->context);
+			metrics = pango_context_get_metrics(bv->context, bv->font, lang);
+			bv->font_ascent = pango_font_metrics_get_ascent(metrics) / PANGO_SCALE;
+			bv->font_descent = pango_font_metrics_get_descent(metrics) / PANGO_SCALE;
+			pango_font_metrics_unref(metrics);
+
+			bv->fontsize = bv->font_ascent + bv->font_descent;
+		}
+		g_assert(bv->context);
+		bytes_view_adjustment_set(bv);
+	}
+}
+
+static void 
+bytes_view_realize(GtkWidget *widget)
+{
+	BytesView *bv;
+	GdkWindowAttr attributes;
+ 
+	_gtk_widget_set_realized_true(widget);
+	bv = BYTES_VIEW(widget);
+
+	attributes.window_type = GDK_WINDOW_CHILD;
+	attributes.x = widget->allocation.x;
+	attributes.y = widget->allocation.y;
+	attributes.width = widget->allocation.width;
+	attributes.height = widget->allocation.height;
+	attributes.wclass = GDK_INPUT_OUTPUT;
+	attributes.visual = gtk_widget_get_visual(widget);
+	attributes.colormap = gtk_widget_get_colormap(widget);
+
+	attributes.event_mask = gtk_widget_get_events(widget) | GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK | GDK_BUTTON_RELEASE_MASK | GDK_POINTER_MOTION_MASK;
+
+	widget->window = gdk_window_new(widget->parent->window, &attributes, GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP);
+
+	gdk_window_set_user_data(widget->window, widget);
+
+	gdk_window_set_back_pixmap(widget->window, NULL, FALSE);
+	widget->style = gtk_style_attach(widget->style, widget->window);
+	bytes_view_ensure_layout(bv);
+}
+
+static void 
+bytes_view_unrealize(GtkWidget *widget)
+{
+	BytesView *bv = BYTES_VIEW(widget);
+
+	if (bv->context) {
+		g_object_unref(bv->context);
+		bv->context = NULL;
+	}
+	/* if there are still events in the queue, this'll avoid segfault */
+	gdk_window_set_user_data(widget->window, NULL);
+
+	if (parent_class->unrealize)
+		(*GTK_WIDGET_CLASS(parent_class)->unrealize)(widget);
+}
+
+static GtkAdjustment *
+bytes_view_ensure_vadj(BytesView *bv)
+{
+	if (bv->vadj == NULL) {
+		bytes_view_set_scroll_adjustments(bv, bv->hadj, bv->vadj);
+		g_assert(bv->vadj != NULL);
+	}
+	return bv->vadj;
+}
+
+static GtkAdjustment *
+bytes_view_ensure_hadj(BytesView *bv)
+{
+	if (bv->hadj == NULL) {
+		bytes_view_set_scroll_adjustments(bv, bv->hadj, bv->vadj);
+		g_assert(bv->hadj != NULL);
+	}
+	return bv->hadj;
+}
+
+static gboolean 
+bytes_view_scroll(GtkWidget *widget, GdkEventScroll *event)
+{
+	BytesView *bv = BYTES_VIEW(widget);
+
+	gfloat new_value;
+
+	if (event->direction == GDK_SCROLL_UP) {	/* mouse wheel pageUp */
+		bytes_view_ensure_vadj(bv);
+
+		new_value = bv->vadj->value - (bv->vadj->page_increment / 10);
+		if (new_value < bv->vadj->lower)
+			new_value = bv->vadj->lower;
+		gtk_adjustment_set_value(bv->vadj, new_value);
+
+	} else if (event->direction == GDK_SCROLL_DOWN) {	/* mouse wheel pageDn */
+		bytes_view_ensure_vadj(bv);
+
+		new_value = bv->vadj->value + (bv->vadj->page_increment / 10);
+		if (new_value > (bv->vadj->upper - bv->vadj->page_size))
+			new_value = bv->vadj->upper - bv->vadj->page_size;
+		gtk_adjustment_set_value(bv->vadj, new_value);
+	}
+	return FALSE;
+}
+
+static void 
+bytes_view_allocate(GtkWidget *widget, GtkAllocation *allocation)
+{
+	widget->allocation = *allocation;
+	if (gtk_widget_get_realized(widget)) {
+		BytesView *bv = BYTES_VIEW(widget);
+
+		gdk_window_move_resize(widget->window, allocation->x, allocation->y, allocation->width, allocation->height);
+		bytes_view_adjustment_set(bv);
+	}
+}
+
+static void 
+bytes_view_size_request(GtkWidget *widget _U_, GtkRequisition *requisition)
+{
+	requisition->width = 200;
+	requisition->height = 90;
+}
+
+static GSList *
+_pango_runs_build(BytesView *bv, const char *str, int len)
+{
+	GSList *runs = NULL;
+
+	PangoAttrList *attrs;
+	PangoAttrIterator *iter;
+
+	GList *run_list;
+	GList *tmp_list;
+
+	attrs = pango_attr_list_new();
+	pango_attr_list_insert_before(attrs, pango_attr_font_desc_new(bv->font));
+
+	iter = pango_attr_list_get_iterator(attrs);
+
+	run_list = pango_itemize(bv->context, str, 0, len, attrs, iter);
+
+	for (tmp_list = run_list; tmp_list; tmp_list = tmp_list->next) {
+		PangoLayoutRun *run = g_slice_new(PangoLayoutRun);
+		PangoItem *run_item = tmp_list->data;
+
+		run->item = run_item;
+
+		/* XXX pango_layout_get_item_properties(run_item, &state->properties); */
+
+		run->glyphs = pango_glyph_string_new();
+		pango_shape(str + run_item->offset, run_item->length, &run_item->analysis, run->glyphs);
+
+		runs = g_slist_prepend(runs, run);
+	}
+
+	g_list_free(run_list);
+
+	pango_attr_iterator_destroy(iter);
+	pango_attr_list_unref(attrs);
+
+	return g_slist_reverse(runs);
+}
+
+static int
+_pango_glyph_string_to_pixels(PangoGlyphString *glyphs, PangoFont *font _U_)
+{
+#if PANGO_VERSION_MAJOR == 1 && PANGO_VERSION_MINOR >= 14
+	return pango_glyph_string_get_width(glyphs) / PANGO_SCALE;
+#else
+	PangoRectangle logical_rect;
+
+	pango_glyph_string_extents(glyphs, font, NULL, &logical_rect);
+ 	/*  pango_extents_to_pixels(&logical_rect, NULL); */
+
+	return (logical_rect.width / PANGO_SCALE);
+#endif
+}
+
+static int
+xtext_draw_layout_line(cairo_t *cr, gint x, gint y, GSList *runs)
+{
+	while (runs) {
+		PangoLayoutRun *run = runs->data;
+
+		cairo_move_to(cr, x, y);
+		pango_cairo_show_glyph_string(cr, run->item->analysis.font, run->glyphs);
+
+		x += _pango_glyph_string_to_pixels(run->glyphs, run->item->analysis.font);
+		runs = runs->next;
+	}
+	return x;
+}
+
+static int
+_pango_runs_width(GSList *runs)
+{
+	int width = 0;
+
+	while (runs) {
+		PangoLayoutRun *run = runs->data;
+
+		width += _pango_glyph_string_to_pixels(run->glyphs, run->item->analysis.font);
+		runs = runs->next;
+	}
+	return width;
+}
+
+static void
+_pango_runs_free(GSList *runs)
+{
+	GSList *list = runs;
+
+	while (list) {
+		PangoLayoutRun *run = list->data;
+
+		pango_item_free(run->item);
+		pango_glyph_string_free(run->glyphs);
+		g_slice_free(PangoLayoutRun, run);
+
+		list = list->next;
+	}
+	g_slist_free(runs);
+}
+
+typedef int bytes_view_line_cb(BytesView *, void *data, int x, int arg1, const char *str, int len);
+
+static int
+bytes_view_flush_render(BytesView *bv, void *data, int x, int y, const char *str, int len)
+{
+	cairo_t *cr = data;
+	GSList *line_runs;
+	int str_width;
+
+	if (len < 1)
+		return 0;
+
+	line_runs = _pango_runs_build(bv, str, len);
+
+	/* XXX, cliping */
+
+	if (bv->state != GTK_STATE_NORMAL) {
+		str_width = _pango_runs_width(line_runs);
+
+		/* background */
+		gdk_cairo_set_source_color(cr, &gtk_widget_get_style(GTK_WIDGET(bv))->base[bv->state]);
+		cairo_rectangle(cr, x, y - bv->font_ascent, str_width, bv->fontsize);
+		cairo_fill(cr);
+	}
+
+	/* text */
+	gdk_cairo_set_source_color(cr, &gtk_widget_get_style(GTK_WIDGET(bv))->text[bv->state]);
+	str_width = xtext_draw_layout_line(cr, x, y, line_runs)-x;
+
+	_pango_runs_free(line_runs);
+
+	return str_width;
+}
+
+static int
+_pango_runs_find_index(GSList *runs, int x_pos, const char *str)
+{
+	int start_pos = 0;
+
+	while (runs) {
+		PangoLayoutRun *run = runs->data;
+		int width;
+
+		width = _pango_glyph_string_to_pixels(run->glyphs, run->item->analysis.font);
+
+		if (x_pos >= start_pos && x_pos < start_pos + width) {
+			gboolean char_trailing;
+			int pos;
+
+			pango_glyph_string_x_to_index(run->glyphs,
+					(char *) str + run->item->offset, run->item->length,
+					&run->item->analysis,
+					(x_pos - start_pos) * PANGO_SCALE,
+					&pos, &char_trailing);
+
+			return run->item->offset + pos;
+		}
+
+		start_pos += width;
+		runs = runs->next;
+	}
+	return -1;
+}
+
+static int
+bytes_view_flush_pos(BytesView *bv, void *data, int x, int search_x, const char *str, int len)
+{
+	int *pos_x = data;
+	GSList *line_runs;
+	int line_width;
+
+	if (len < 1)
+		return 0;
+
+	line_runs = _pango_runs_build(bv, str, len);
+
+	line_width = _pango_runs_width(line_runs);
+
+	if (x <= search_x && x + line_width > search_x) {
+		int off_x = search_x - x;
+		int pos_run;
+		
+		if ((pos_run = _pango_runs_find_index(line_runs, off_x, str)) != -1)
+			*pos_x = (-*pos_x) + pos_run;
+
+		return -1;	/* terminate */
+	} else
+		*pos_x -= len;
+
+	_pango_runs_free(line_runs);
+
+	return line_width;
+}
+
+static void
+bytes_view_render_state(BytesView *bv, int state)
+{
+	g_assert(state == GTK_STATE_NORMAL || state == GTK_STATE_SELECTED);
+
+	if (bv->bold_highlight) {
+		pango_font_description_set_weight(bv->font, 
+				(state == GTK_STATE_SELECTED) ? PANGO_WEIGHT_BOLD : PANGO_WEIGHT_NORMAL);
+		bv->state = GTK_STATE_NORMAL;
+	} else
+		bv->state = state;
+}
+
+#define BYTE_VIEW_SEP    8      /* insert a space every BYTE_VIEW_SEP bytes */
+
+static void
+_bytes_view_line_common(BytesView *bv, void *data, const int org_off, int xx, int arg1, bytes_view_line_cb flush)
+{
+	static const guchar hexchars[16] = {
+		'0', '1', '2', '3', '4', '5', '6', '7',
+		'8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
+
+	const guint8 *pd = bv->pd;
+	const int len = bv->len;
+
+	int state;
+
+	char str[128];
+	int cur = 0;
+
+	int off;
+	guchar c;
+	int byten;
+	int j;
+
+	int scroll_x;
+	int dx;
+
+	g_assert(org_off >= 0);
+
+	scroll_x = bytes_view_ensure_hadj(bv)->value;
+
+	state = GTK_STATE_NORMAL;
+	bytes_view_render_state(bv, GTK_STATE_NORMAL);
+
+	/* Print the line number */
+	j = bv->use_digits;
+	do {
+		j--;
+		c = (org_off >> (j*4)) & 0xF;
+		str[cur++] = hexchars[c];
+	} while (j != 0);
+	str[cur++] = ' ';
+	str[cur++] = ' ';
+
+	/* Print the hex bit */
+	for (byten = 0, off = org_off; byten < bv->per_line; byten++) {
+		gboolean byte_highlighted = 
+			(off >= bv->start[0] && off < bv->end[0]) ||
+			(off >= bv->start[1] && off < bv->end[1]);
+		int state_cur = (off < len && byte_highlighted) ?
+				GTK_STATE_SELECTED : GTK_STATE_NORMAL;
+
+		if (state_cur != state) {
+			if (state == GTK_STATE_NORMAL && byten) {
+				str[cur++] = ' ';
+				/* insert a space every BYTE_VIEW_SEP bytes */
+				if ((off % BYTE_VIEW_SEP) == 0)
+					str[cur++] = ' ';
+			}
+
+			if ((dx = flush(bv, data, xx - scroll_x, arg1, str, cur)) < 0)
+				return;
+			xx += dx;
+			cur = 0;
+			bytes_view_render_state(bv, state_cur);
+			state = state_cur;
+
+			if (state == GTK_STATE_NORMAL && byten) {
+				str[cur++] = ' ';
+				/* insert a space every BYTE_VIEW_SEP bytes */
+				if ((off % BYTE_VIEW_SEP) == 0)
+					str[cur++] = ' ';
+			}
+
+		} else if (byten) {
+			str[cur++] = ' ';
+			/* insert a space every BYTE_VIEW_SEP bytes */
+			if ((off % BYTE_VIEW_SEP) == 0)
+				str[cur++] = ' ';
+		}
+
+		if (off < len) {
+			switch (bv->format) {
+				case BYTES_HEX:
+					str[cur++] = hexchars[(pd[off] & 0xf0) >> 4];
+					str[cur++] = hexchars[pd[off] & 0x0f];
+					break;
+				case BYTES_BITS:
+					/* XXX, bitmask */
+					for (j = 7; j >= 0; j--)
+						str[cur++] = (pd[off] & (1 << j)) ? '1' : '0';
+					break;
+			}
+		} else {
+			switch (bv->format) {
+				case BYTES_HEX:
+					str[cur++] = ' ';
+					str[cur++] = ' ';
+					break;
+				case BYTES_BITS:
+					for (j = 7; j >= 0; j--)
+						str[cur++] = ' ';
+					break;
+			}
+		}
+		off++;
+	}
+
+	if (state != GTK_STATE_NORMAL) {
+		if ((dx = flush(bv, data, xx - scroll_x, arg1, str, cur)) < 0)
+			return;
+		xx += dx;
+		cur = 0;
+		bytes_view_render_state(bv, GTK_STATE_NORMAL);
+		state = GTK_STATE_NORMAL;
+	}
+
+	/* Print some space at the end of the line */
+	str[cur++] = ' '; str[cur++] = ' '; str[cur++] = ' ';
+
+	/* Print the ASCII bit */
+	for (byten = 0, off = org_off; byten < bv->per_line; byten++) {
+		gboolean byte_highlighted = 
+			(off >= bv->start[0] && off < bv->end[0]) ||
+			(off >= bv->start[1] && off < bv->end[1]);
+		int state_cur = (off < len && byte_highlighted) ?
+				GTK_STATE_SELECTED : GTK_STATE_NORMAL;
+
+		if (state_cur != state) {
+			if (state == GTK_STATE_NORMAL && byten) {
+				/* insert a space every BYTE_VIEW_SEP bytes */
+				if ((off % BYTE_VIEW_SEP) == 0)
+					str[cur++] = ' ';
+			}
+
+			if ((dx = flush(bv, data, xx - scroll_x, arg1, str, cur)) < 0)
+				return;
+			xx += dx;
+			cur = 0;
+			bytes_view_render_state(bv, state_cur);
+			state = state_cur;
+
+			if (state == GTK_STATE_NORMAL && byten) {
+				/* insert a space every BYTE_VIEW_SEP bytes */
+				if ((off % BYTE_VIEW_SEP) == 0)
+					str[cur++] = ' ';
+			}
+
+		} else if (byten) {
+			/* insert a space every BYTE_VIEW_SEP bytes */
+			if ((off % BYTE_VIEW_SEP) == 0)
+				str[cur++] = ' ';
+		}
+
+		if (off < len) {
+			c = (bv->encoding == PACKET_CHAR_ENC_CHAR_EBCDIC) ? 
+				EBCDIC_to_ASCII1(pd[off]) :
+				pd[off];
+
+			str[cur++] = isprint(c) ? c : '.';
+		} else
+			str[cur++] = ' ';
+
+		off++;
+	}
+
+	if (cur) {
+		if ((dx = flush(bv, data, xx - scroll_x, arg1, str, cur)) < 0)
+			return;
+		xx += dx;
+		/* cur = 0; */
+	}
+
+	if (state != GTK_STATE_NORMAL) {
+		bytes_view_render_state(bv, GTK_STATE_NORMAL);
+		/* state = GTK_STATE_NORMAL; */
+	}
+
+	if (bv->max_width < xx)
+		bv->max_width = xx;
+}
+
+static void
+_bytes_view_render_line(BytesView *bv, cairo_t *cr, const int org_off, int yy)
+{
+	_bytes_view_line_common(bv, cr, org_off, MARGIN, yy, bytes_view_flush_render);
+}
+
+static int
+_bytes_view_find_pos(BytesView *bv, const int org_off, int search_x)
+{
+	int pos_x = 0;
+
+	_bytes_view_line_common(bv, &pos_x, org_off, MARGIN, search_x, bytes_view_flush_pos);
+
+	return pos_x;
+}
+
+static void
+bytes_view_render(BytesView *bv, GdkRectangle *area)
+{
+	const int old_max_width = bv->max_width;
+
+	int width, height;
+	GdkDrawable *draw_buf;
+	cairo_t *cr;
+	int y;
+	int off;
+
+	guint line, lines_max;
+	guint lines_max_full;
+
+	if (!gtk_widget_get_realized(GTK_WIDGET(bv)))
+		return;
+
+	bytes_view_ensure_layout(bv);
+
+	draw_buf = GTK_WIDGET(bv)->window;
+	gdk_drawable_get_size(draw_buf, &width, &height);
+
+	if (width < 32 + MARGIN || height < bv->fontsize)
+		return;
+
+	if (area) {
+		line = area->y / bv->fontsize;
+		lines_max = 1 + (area->y + area->height) / bv->fontsize;
+	} else {
+		line = 0;
+		lines_max = (guint) -1;
+	}
+
+	off = 0;
+	y = (bv->fontsize * line);
+
+	cr = gdk_cairo_create(draw_buf);
+	if (area) {
+		gdk_cairo_rectangle(cr, area);
+		/* gdk_cairo_area(cr, rectangle); */
+		cairo_clip(cr);
+	}
+
+	/* clear */
+	gdk_cairo_set_source_color(cr, &gtk_widget_get_style(GTK_WIDGET(bv))->base[GTK_STATE_NORMAL]);
+	if (area)
+		cairo_rectangle(cr, area->x, area->y, area->x + area->width, area->y + area->height);
+	else
+		cairo_rectangle(cr, 0, 0, width, height);
+	cairo_fill(cr);
+
+	if (bv->pd) {
+		guint real_line = line + bytes_view_ensure_vadj(bv)->value;
+
+		lines_max_full = (height / bv->fontsize) + 1;
+		if (lines_max_full < lines_max)
+			lines_max = lines_max_full;
+
+		off = real_line * bv->per_line;
+
+		while (off < bv->len) {
+			_bytes_view_render_line(bv, cr, off, y + bv->font_ascent);
+			line++;
+			if (line >= lines_max)
+				break;
+
+			off += bv->per_line;
+			y += bv->fontsize;
+		}
+	}
+
+	cairo_destroy(cr);
+
+	if (old_max_width != bv->max_width)
+		bytes_view_adjustment_set(bv);
+}
+
+static void
+bytes_view_render_full(BytesView *bv)
+{
+	if (bv->adj_tag) {
+		g_source_remove(bv->adj_tag);
+		bv->adj_tag = 0;
+	}
+	bytes_view_render(bv, NULL);
+}
+
+static void
+bytes_view_paint(GtkWidget *widget, GdkRectangle *area)
+{
+	BytesView *bv = BYTES_VIEW(widget);
+
+	if (area->x == 0 && area->y == 0 && area->height == widget->allocation.height && area->width == widget->allocation.width)
+		bytes_view_render_full(bv);
+	else
+		bytes_view_render(bv, area);
+}
+
+static gboolean 
+bytes_view_expose(GtkWidget *widget, GdkEventExpose *event)
+{
+	bytes_view_paint(widget, &event->area);
+	return FALSE;
+}
+
+static void 
+bytes_view_adjustment_set(BytesView *bv)
+{
+	if (bv->vadj) {
+		bv->vadj->lower = 0;
+		bv->vadj->upper = (int) (bv->len / bv->per_line);
+		if ((bv->len % bv->per_line))
+			bv->vadj->upper++;
+
+		bytes_view_ensure_layout(bv);
+
+		bv->vadj->page_size =
+			(GTK_WIDGET(bv)->allocation.height - bv->font_descent) / bv->fontsize;
+		bv->vadj->step_increment = 1;
+		bv->vadj->page_increment = bv->vadj->page_size;
+
+		if (bv->vadj->value > bv->vadj->upper - bv->vadj->page_size)
+			bv->vadj->value = bv->vadj->upper - bv->vadj->page_size;
+
+		if (bv->vadj->value < 0)
+			bv->vadj->value = 0;
+
+		gtk_adjustment_changed(bv->vadj);
+	}
+
+	if (bv->hadj) {
+		bv->hadj->lower = 0;
+		bv->hadj->upper = bv->max_width;
+
+		bytes_view_ensure_layout(bv);
+
+		bv->hadj->page_size = (GTK_WIDGET(bv)->allocation.width);
+		bv->hadj->step_increment = bv->hadj->page_size / 10.0;
+		bv->hadj->page_increment = bv->hadj->page_size;
+
+		if (bv->hadj->value > bv->hadj->upper - bv->hadj->page_size)
+			bv->hadj->value = bv->hadj->upper - bv->hadj->page_size;
+
+		if (bv->hadj->value < 0)
+			bv->hadj->value = 0;
+
+		gtk_adjustment_changed(bv->hadj);
+	}
+}
+
+static gint 
+bytes_view_adjustment_timeout(BytesView *bv)
+{
+	bv->adj_tag = 0;
+	bytes_view_render_full(bv);
+	return 0;
+}
+
+static void 
+bytes_view_adjustment_changed(GtkAdjustment *adj, BytesView *bv)
+{
+	/*  delay rendering when scrolling (10ms) */
+	if (adj && ((adj == bv->vadj) || (adj == bv->hadj))) {
+		if (!bv->adj_tag)
+			bv->adj_tag = g_timeout_add(REFRESH_TIMEOUT, (GSourceFunc) bytes_view_adjustment_timeout, bv);
+	}
+}
+
+static void
+bytes_view_set_scroll_adjustments(BytesView *bv, GtkAdjustment *hadj, GtkAdjustment *vadj)
+{
+	gboolean need_adjust = FALSE;
+
+	g_return_if_fail(!hadj || GTK_IS_ADJUSTMENT(hadj));
+	g_return_if_fail(!vadj || GTK_IS_ADJUSTMENT(vadj));
+
+	if (!vadj)
+		vadj = GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
+
+	if (!hadj)
+		hadj = GTK_ADJUSTMENT(gtk_adjustment_new(0.0, 0.0, 0.0, 0.0, 0.0, 0.0));
+
+	if (bv->vadj && (bv->vadj != vadj)) {
+		g_signal_handlers_disconnect_by_func(bv->vadj, bytes_view_adjustment_changed, bv);
+		g_object_unref(bv->vadj);
+	}
+	if (bv->vadj != vadj) {
+		bv->vadj = vadj;
+		g_object_ref_sink(bv->vadj);
+
+		g_signal_connect(bv->vadj, "value-changed", G_CALLBACK(bytes_view_adjustment_changed), bv);
+		need_adjust = TRUE;
+	}
+
+	if (bv->hadj && (bv->hadj != hadj)) {
+		g_signal_handlers_disconnect_by_func(bv->hadj, bytes_view_adjustment_changed, bv);
+		g_object_unref(bv->hadj);
+	}
+	if (bv->hadj != hadj) {
+		bv->hadj = hadj;
+		g_object_ref_sink(bv->hadj);
+
+		g_signal_connect(bv->hadj, "value-changed", G_CALLBACK(bytes_view_adjustment_changed), bv);
+		need_adjust = TRUE;
+	}
+
+	if (need_adjust)
+		bytes_view_adjustment_set(bv);
+}
+
+static void 
+bytes_view_class_init(BytesViewClass *klass)
+{
+	GtkObjectClass *object_class;
+	GtkWidgetClass *widget_class;
+
+	parent_class = (GtkWidgetClass *) g_type_class_peek_parent(klass);
+
+	object_class = (GtkObjectClass *) klass;
+	widget_class = (GtkWidgetClass *) klass;
+
+	object_class->destroy = bytes_view_destroy;
+	widget_class->realize = bytes_view_realize;
+	widget_class->unrealize = bytes_view_unrealize;
+	widget_class->size_request = bytes_view_size_request;
+	widget_class->size_allocate = bytes_view_allocate;
+	widget_class->expose_event = bytes_view_expose;
+	widget_class->scroll_event = bytes_view_scroll;
+
+	klass->set_scroll_adjustments = bytes_view_set_scroll_adjustments;
+
+	widget_class->set_scroll_adjustments_signal = 
+		g_signal_new(g_intern_static_string("set-scroll-adjustments"),
+			G_OBJECT_CLASS_TYPE(object_class),
+			G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
+			G_STRUCT_OFFSET(BytesViewClass, set_scroll_adjustments),
+			NULL, NULL,
+			gtk_marshal_VOID__POINTER_POINTER,
+/*			_gtk_marshal_VOID__OBJECT_OBJECT, */
+			G_TYPE_NONE, 2,
+			GTK_TYPE_ADJUSTMENT,
+			GTK_TYPE_ADJUSTMENT);
+}
+
+GType 
+bytes_view_get_type(void)
+{
+	static GType bytes_view_type = 0;
+	
+	if (!bytes_view_type) {
+		static const GTypeInfo bytes_view_info = {
+			sizeof (BytesViewClass),
+			NULL, /* base_init */
+			NULL, /* base_finalize */
+			(GClassInitFunc) bytes_view_class_init,
+			NULL, /* class finalize */
+			NULL, /* class_data */
+			sizeof(BytesView),
+			0, /* n_preallocs */
+			(GInstanceInitFunc) bytes_view_init,
+			NULL /* value_table */
+		};
+	
+		bytes_view_type = g_type_register_static(GTK_TYPE_WIDGET,
+							"BytesView",
+							&bytes_view_info,
+							(GTypeFlags)0);	
+	}
+	return bytes_view_type;
+}
+
+int 
+bytes_view_byte_from_xy(BytesView *bv, int x, int y)
+{
+	/* hex_pos_byte array generated with hex_view_get_byte(0, 0, 0...70) */
+	static const int hex_pos_byte[70] = { 
+		-1, -1,
+		0, 0, 0, 1, 1, 1, 2, 2, 2, 3, 3, 3,
+		4, 4, 4, 5, 5, 5, 6, 6, 6, 7, 7, 7,
+		-1,
+		8, 8, 8, 9, 9, 9, 10, 10, 10, 11, 11, 11,
+		12, 12, 12, 13, 13, 13, 14, 14, 14, 15, 15, 15,
+		-1, -1,
+		0, 1, 2, 3, 4, 5, 6, 7,
+		-1,
+		8, 9, 10, 11, 12, 13, 14, 15
+	};
+
+	/* bits_pos_byte array generated with bit_view_get_byte(0, 0, 0...84) */
+	static const int bits_pos_byte[84] = {
+		-1, -1,
+		0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1,
+		2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3,
+		4, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5,
+		6, 6, 6, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7,
+		-1, -1,
+		0, 1, 2, 3, 4, 5, 6, 7
+	};
+
+	int char_x, off_x = 1;
+	int char_y, off_y;
+
+	if (x < MARGIN)
+		return -1;
+
+	bytes_view_ensure_layout(bv);
+
+	char_y = bytes_view_ensure_vadj(bv)->value + (y / bv->fontsize);
+	off_y = char_y * bv->per_line;
+
+	char_x = _bytes_view_find_pos(bv, off_y, x);
+	if (/* char_x < 0 || */ char_x < bv->use_digits)
+		return -1;
+	char_x -= bv->use_digits;
+
+	switch (bv->format) {
+		case BYTES_BITS:
+			g_return_val_if_fail(char_x >= 0 && char_x < (int) G_N_ELEMENTS(bits_pos_byte), -1);
+			off_x = bits_pos_byte[char_x];
+			break;
+
+		case BYTES_HEX:
+			g_return_val_if_fail(char_x >= 0 && char_x < (int) G_N_ELEMENTS(hex_pos_byte), -1);
+			off_x = hex_pos_byte[char_x];
+			break;
+	}
+
+	if (off_x == -1)
+		return -1;
+
+	return off_y + off_x;
+}
+
+void 
+bytes_view_scroll_to_byte(BytesView *bv, int byte)
+{
+	int line;
+
+	g_return_if_fail(byte >= 0 && byte < bv->len);
+
+	line = byte / bv->per_line;
+
+	bytes_view_ensure_vadj(bv);
+
+	if (line > bv->vadj->upper - bv->vadj->page_size) {
+		line = bv->vadj->upper - bv->vadj->page_size;
+
+		if (line < 0)
+			line = 0;
+	}
+
+	/* after bytes_view_scroll_to_byte() we always do bytes_view_refresh() so we can block it */
+	g_signal_handlers_block_by_func(bv->vadj, bytes_view_adjustment_changed, bv);
+	gtk_adjustment_set_value(bv->vadj, line);
+	g_signal_handlers_unblock_by_func(bv->vadj, bytes_view_adjustment_changed, bv);
+
+	/* XXX, scroll hadj? */
+}
+
+void
+bytes_view_set_font(BytesView *bv, PangoFontDescription *font)
+{
+	if (bv->font)
+		pango_font_description_free(bv->font);
+
+	bv->font = pango_font_description_copy(font);
+	bv->max_width = 0;
+
+	if (bv->context) {
+		g_object_unref(bv->context);
+		bv->context = NULL;
+		bytes_view_ensure_layout(bv);
+	}
+}
+
+void 
+bytes_view_set_data(BytesView *bv, const guint8 *data, int len)
+{
+	g_free(bv->pd);
+	bv->pd = g_memdup(data, len);
+	bv->len = len;
+
+	/*
+	 * How many of the leading digits of the offset will we supply?
+	 * We always supply at least 4 digits, but if the maximum offset
+	 * won't fit in 4 digits, we use as many digits as will be needed.
+	 */
+	if (((len - 1) & 0xF0000000) != 0)
+		bv->use_digits = 8; /* need all 8 digits */
+	else if (((len - 1) & 0x0F000000) != 0)
+		bv->use_digits = 7; /* need 7 digits */
+	else if (((len - 1) & 0x00F00000) != 0)
+		bv->use_digits = 6; /* need 6 digits */
+	else if (((len - 1) & 0x000F0000) != 0)
+		bv->use_digits = 5; /* need 5 digits */
+	else
+		bv->use_digits = 4; /* we'll supply 4 digits */
+
+	bytes_view_ensure_vadj(bv);
+
+	bytes_view_adjustment_set(bv);
+}
+
+void 
+bytes_view_set_encoding(BytesView *bv, int enc)
+{
+	g_assert(enc == PACKET_CHAR_ENC_CHAR_ASCII || enc == PACKET_CHAR_ENC_CHAR_EBCDIC);
+
+	bv->encoding = enc;
+}
+
+void 
+bytes_view_set_format(BytesView *bv, int format)
+{
+	g_assert(format == BYTES_HEX || format == BYTES_BITS);
+
+	bv->format = format;
+
+	switch (format) {
+		case BYTES_BITS:
+			bv->per_line = 8;
+			break;
+
+		case BYTES_HEX:
+			bv->per_line = 16;
+			break;
+	}
+}
+
+void
+bytes_view_set_highlight_style(BytesView *bv, gboolean inverse)
+{
+	bv->bold_highlight = !inverse;
+}
+
+void 
+bytes_view_set_highlight(BytesView *bv, int start, int end, guint32 mask _U_, int maskle _U_)
+{
+	bv->start[0] = start;
+	bv->end[0] = end;
+}
+
+void 
+bytes_view_set_highlight_appendix(BytesView *bv, int start, int end)
+{
+	bv->start[1] = start;
+	bv->end[1] = end;
+}
+
+void 
+bytes_view_refresh(BytesView *bv)
+{
+	/* bytes_view_render_full(bv); */
+	gtk_widget_queue_draw(GTK_WIDGET(bv));
+}
+
+GtkWidget *
+bytes_view_new(void)
+{
+	GtkWidget *widget;
+
+	widget = (GtkWidget *) g_object_new(BYTES_VIEW_TYPE, NULL);
+
+	g_assert(widget != NULL);
+
+	return widget;
+}