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wireshark/gtk/font_utils.c

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/* font_utils.c
* Utilities to use for font manipulation
*
* $Id$
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gtk/gtk.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <epan/packet.h>
#include <epan/ws_strsplit.h>
#ifdef _WIN32
#include <windows.h>
#include <tchar.h>
#include <epan/unicode-utils.h>
#endif
#include "main.h"
#include "recent.h"
#include <epan/prefs.h>
#include "gtkglobals.h"
#include "compat_macros.h"
#include "font_utils.h"
#include "simple_dialog.h"
#include "packet_list.h"
#include "proto_draw.h"
#include "follow_tcp.h"
#if GTK_MAJOR_VERSION < 2
guint m_font_height, m_font_width;
#endif
FONT_TYPE *m_r_font, *m_b_font;
/* Get the regular user font.
*
* @return the regular user font
*/
FONT_TYPE *user_font_get_regular(void)
{
return m_r_font;
}
/* Get the bold user font.
*
* @return the bold user font
*/
FONT_TYPE *user_font_get_bold(void)
{
return m_b_font;
}
#if GTK_MAJOR_VERSION < 2
/* Get the regular user font height.
*
* @return the regular user font height
*/
guint user_font_get_regular_height(void)
{
return m_font_height;
}
/* Get the regular user font width.
*
* @return the regular user font width
*/
guint user_font_get_regular_width(void)
{
return m_font_width;
}
#endif
static void
set_fonts(FONT_TYPE *regular, FONT_TYPE *bold)
{
/* Yes, assert. The code that loads the font should check
* for NULL and provide its own error message. */
g_assert(m_r_font && m_b_font);
m_r_font = regular;
m_b_font = bold;
#if GTK_MAJOR_VERSION < 2
m_font_height = m_r_font->ascent + m_r_font->descent;
m_font_width = gdk_string_width(m_r_font, "0");
#endif
}
void
view_zoom_in_cb(GtkWidget *w _U_, gpointer d _U_)
{
gint save_gui_zoom_level;
save_gui_zoom_level = recent.gui_zoom_level;
recent.gui_zoom_level++;
switch (user_font_apply()) {
case FA_SUCCESS:
break;
case FA_FONT_NOT_RESIZEABLE:
/* "font_apply()" popped up an alert box. */
recent.gui_zoom_level = save_gui_zoom_level; /* undo zoom */
break;
case FA_FONT_NOT_AVAILABLE:
/* We assume this means that the specified size isn't available. */
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Your current font isn't available in the next larger size.\n");
recent.gui_zoom_level = save_gui_zoom_level; /* undo zoom */
break;
}
}
void
view_zoom_out_cb(GtkWidget *w _U_, gpointer d _U_)
{
gint save_gui_zoom_level;
save_gui_zoom_level = recent.gui_zoom_level;
recent.gui_zoom_level--;
switch (user_font_apply()) {
case FA_SUCCESS:
break;
case FA_FONT_NOT_RESIZEABLE:
/* "font_apply()" popped up an alert box. */
recent.gui_zoom_level = save_gui_zoom_level; /* undo zoom */
break;
case FA_FONT_NOT_AVAILABLE:
/* We assume this means that the specified size isn't available. */
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Your current font isn't available in the next smaller size.\n");
recent.gui_zoom_level = save_gui_zoom_level; /* undo zoom */
break;
}
}
void
view_zoom_100_cb(GtkWidget *w _U_, gpointer d _U_)
{
gint save_gui_zoom_level;
save_gui_zoom_level = recent.gui_zoom_level;
recent.gui_zoom_level = 0;
switch (user_font_apply()) {
case FA_SUCCESS:
break;
case FA_FONT_NOT_RESIZEABLE:
/* "font_apply()" popped up an alert box. */
recent.gui_zoom_level = save_gui_zoom_level; /* undo zoom */
break;
case FA_FONT_NOT_AVAILABLE:
/* We assume this means that the specified size isn't available.
XXX - this "shouldn't happen". */
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Your current font couldn't be reloaded at the size you selected.\n");
recent.gui_zoom_level = save_gui_zoom_level; /* undo zoom */
break;
}
}
#if GTK_MAJOR_VERSION < 2
/* Given a font name, construct the name of the next heavier version of
that font. */
#define XLFD_WEIGHT 3 /* index of the "weight" field */
/* Map from a given weight to the appropriate weight for the "bold"
version of a font.
XXX - the XLFD says these strings shouldn't be used for font matching;
can we get the weight, as a number, from GDK, and ask GDK to find us
a font just like the given font, but with the appropriate higher
weight? */
static const struct {
char *light;
char *heavier;
} weight_map[] = {
{ "ultralight", "light" },
{ "extralight", "semilight" },
{ "light", "medium" },
{ "semilight", "semibold" },
{ "medium", "bold" },
{ "normal", "bold" },
{ "semibold", "extrabold" },
{ "bold", "ultrabold" }
};
#define N_WEIGHTS (sizeof weight_map / sizeof weight_map[0])
/* Try to convert a font name to it's bold version.
*
* @param the font to convert
* @return the bold font
*/
static char *
user_font_boldify(const char *font_name)
{
char *bold_font_name;
gchar **xlfd_tokens;
unsigned int i;
/* Is this an XLFD font? If it begins with "-", yes, otherwise no. */
if (font_name[0] == '-') {
xlfd_tokens = g_strsplit(font_name, "-", XLFD_WEIGHT+1);
/*
* Make sure we *have* a weight (this might not be a valid
* XLFD font name).
*/
for (i = 0; i < XLFD_WEIGHT+1; i++) {
if (xlfd_tokens[i] == NULL) {
/*
* We don't, so treat this as a non-XLFD
* font name.
*/
goto not_xlfd;
}
}
for (i = 0; i < N_WEIGHTS; i++) {
if (strcmp(xlfd_tokens[XLFD_WEIGHT],
weight_map[i].light) == 0) {
g_free(xlfd_tokens[XLFD_WEIGHT]);
xlfd_tokens[XLFD_WEIGHT] =
g_strdup(weight_map[i].heavier);
break;
}
}
bold_font_name = g_strjoinv("-", xlfd_tokens);
g_strfreev(xlfd_tokens);
return bold_font_name;
}
not_xlfd:
/*
* This isn't an XLFD font name; just append "bold" to the name
* of the font.
*/
bold_font_name = g_strconcat(font_name, "bold", NULL);
return bold_font_name;
}
#endif
gboolean
user_font_test(gchar *font_name)
{
#if GTK_MAJOR_VERSION < 2
gchar *bold_font_name;
#endif
FONT_TYPE *new_r_font, *new_b_font;
#if GTK_MAJOR_VERSION < 2
/* Get the name that the boldface version of that font would have. */
bold_font_name = user_font_boldify(font_name);
/* Now load those fonts, just to make sure we can. */
new_r_font = gdk_font_load(font_name);
#else
new_r_font = pango_font_description_from_string(font_name);
#endif
if (new_r_font == NULL) {
/* Oops, that font didn't work.
Tell the user, but don't tear down the font selection
dialog, so that they can try again. */
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"The font you selected can't be loaded.");
#if GTK_MAJOR_VERSION < 2
g_free(bold_font_name);
#endif
return FALSE;
}
#if GTK_MAJOR_VERSION < 2
new_b_font = gdk_font_load(bold_font_name);
#else
new_b_font = pango_font_description_copy(new_r_font);
pango_font_description_set_weight(new_b_font, PANGO_WEIGHT_BOLD);
#endif
if (new_b_font == NULL) {
/* Oops, that font didn't work.
Tell the user, but don't tear down the font selection
dialog, so that they can try again. */
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"The font you selected doesn't have a boldface version.");
#if GTK_MAJOR_VERSION < 2
g_free(bold_font_name);
gdk_font_unref(new_r_font);
#else
pango_font_description_free(new_r_font);
#endif
return FALSE;
}
return TRUE;
}
/* Given a font name, construct the name of a version of that font with
the current zoom factor applied. */
static char *
font_zoom(char *gui_font_name)
{
char *new_font_name;
char *font_name_dup;
char *font_name_p;
long font_point_size_l;
#if GTK_MAJOR_VERSION < 2
int minus_chars;
char *font_foundry;
char *font_family;
char *font_weight;
char *font_slant;
char *font_set_width;
char *font_add_style;
char *font_pixel_size;
char *font_point_size;
char *font_res_x;
char *font_res_y;
char *font_spacing;
char *font_aver_width;
char *font_charset_reg;
char *font_charset_encoding;
#endif
if (recent.gui_zoom_level == 0) {
/* There is no zoom factor - just return the name, so that if
this is GTK+ 1.2[.x] and the font name isn't an XLFD font
name, we don't fail. */
return g_strdup(gui_font_name);
}
font_name_dup = g_strdup(gui_font_name);
font_name_p = font_name_dup;
#if GTK_MAJOR_VERSION >= 2
/* find the start of the font_size string */
font_name_p = strrchr(font_name_dup, ' ');
*font_name_p = '\0';
font_name_p++;
/* calculate the new font size */
font_point_size_l = strtol(font_name_p, NULL, 10);
font_point_size_l += recent.gui_zoom_level;
/* build a new font name */
new_font_name = g_strdup_printf("%s %ld", font_name_dup, font_point_size_l);
#else
minus_chars = 0;
/* replace all '-' chars by NUL and count them */
while ((font_name_p = strchr(font_name_p, '-')) != NULL) {
*font_name_p = '\0';
font_name_p++;
minus_chars++;
}
if (minus_chars != 14) {
/*
* Not a valid XLFD font name.
* XXX - can we try scaling it by looking for a size at the end
* and tweaking that? Unfortunately, some fonts have numbers
* at the end that aren't, as far as I know, sizes, e.g. "nil2".
*/
return NULL;
}
/* first element (font name registry) empty */
font_name_p = font_name_dup;
font_name_p += strlen(font_name_p);
font_name_p++;
/* get pointers to all font name elements */
font_foundry = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_family = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_weight = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_slant = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_set_width = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_add_style = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_pixel_size = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_point_size = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_res_x = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_res_y = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_spacing = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_aver_width = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_charset_reg = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
font_charset_encoding = font_name_p;
font_name_p += strlen(font_name_p);
font_name_p++;
/* calculate the new font size */
font_point_size_l = strtol(font_point_size, NULL, 10);
font_point_size_l += recent.gui_zoom_level*10;
if (font_point_size_l <= 0)
font_point_size_l = 10;
/* build a new font name */
new_font_name = g_strdup_printf("-%s-%s-%s-%s-%s-%s-%s-%ld-%s-%s-%s-%s-%s-%s",
font_foundry, font_family, font_weight, font_slant, font_set_width,
font_add_style, font_pixel_size, font_point_size_l, font_res_x,
font_res_y, font_spacing, font_aver_width, font_charset_reg,
font_charset_encoding);
#endif
g_free(font_name_dup);
return new_font_name;
}
fa_ret_t
user_font_apply(void) {
char *gui_font_name;
#if GTK_MAJOR_VERSION < 2
char *bold_font_name;
#endif
FONT_TYPE *new_r_font, *new_b_font;
FONT_TYPE *old_r_font = NULL, *old_b_font = NULL;
/* convert font name to reflect the zoom level */
gui_font_name = font_zoom(prefs.PREFS_GUI_FONT_NAME);
if (gui_font_name == NULL) {
/*
* This means the font name isn't an XLFD font name.
* We just report that for now as a font not available in
* multiple sizes.
*/
simple_dialog(ESD_TYPE_ERROR, ESD_BTN_OK,
"Your current font isn't available in any other sizes.\n");
return FA_FONT_NOT_RESIZEABLE;
}
/* load normal and bold font */
#if GTK_MAJOR_VERSION < 2
new_r_font = gdk_font_load(gui_font_name);
bold_font_name = user_font_boldify(gui_font_name);
new_b_font = gdk_font_load(bold_font_name);
#else
new_r_font = pango_font_description_from_string(gui_font_name);
new_b_font = pango_font_description_copy(new_r_font);
pango_font_description_set_weight(new_b_font, PANGO_WEIGHT_BOLD);
#endif
if (new_r_font == NULL || new_b_font == NULL) {
/* We're no longer using the new fonts; unreference them. */
#if GTK_MAJOR_VERSION < 2
if (new_r_font != NULL)
gdk_font_unref(new_r_font);
if (new_b_font != NULL)
gdk_font_unref(new_b_font);
#else
if (new_r_font != NULL)
pango_font_description_free(new_r_font);
if (new_b_font != NULL)
pango_font_description_free(new_b_font);
#endif
g_free(gui_font_name);
/* We let our caller pop up a dialog box, as the error message
depends on the context (did they zoom in or out, or did they
do something else? */
return FA_FONT_NOT_AVAILABLE;
}
/* the font(s) seem to be ok */
packet_list_set_font(new_r_font);
set_ptree_font_all(new_r_font);
old_r_font = m_r_font;
old_b_font = m_b_font;
set_fonts(new_r_font, new_b_font);
#if GTK_MAJOR_VERSION < 2
g_free(bold_font_name);
#endif
/* Redraw the hex dump windows. */
redraw_hex_dump_all();
/* Redraw the "Follow TCP Stream" windows. */
follow_tcp_redraw_all();
/* We're no longer using the old fonts; unreference them. */
#if GTK_MAJOR_VERSION < 2
if (old_r_font != NULL)
gdk_font_unref(old_r_font);
if (old_b_font != NULL)
gdk_font_unref(old_b_font);
#else
if (old_r_font != NULL)
pango_font_description_free(old_r_font);
if (old_b_font != NULL)
pango_font_description_free(old_b_font);
#endif
g_free(gui_font_name);
return FA_SUCCESS;
}
#ifdef _WIN32
#define NAME_BUFFER_LEN 32
#if GTK_MAJOR_VERSION < 2
/* The setting of the MS default font for system stuff (menus, dialogs, ...),
* coming from: Allin Cottrell, http://www.ecn.wfu.edu/~cottrell/gtk_win32,
* Thank you very much for this! */
static int get_windows_font_gtk1(char *fontspec, int fontspec_len)
{
HDC h_dc;
HGDIOBJ h_font;
TEXTMETRIC tm;
TCHAR name[NAME_BUFFER_LEN];
int len, pix_height;
h_dc = CreateDC(_T("DISPLAY"), NULL, NULL, NULL);
if (h_dc == NULL) return 1;
h_font = GetStockObject(DEFAULT_GUI_FONT);
if (h_font == NULL || !SelectObject(h_dc, h_font)) {
DeleteDC(h_dc);
return 1;
}
len = GetTextFace(h_dc, NAME_BUFFER_LEN, name);
if (len <= 0) {
DeleteDC(h_dc);
return 1;
}
if (!GetTextMetrics(h_dc, &tm)) {
DeleteDC(h_dc);
return 1;
}
pix_height = tm.tmHeight;
DeleteDC(h_dc);
g_snprintf(fontspec, fontspec_len, "-*-%s-*-*-*-*-%i-*-*-*-p-*-iso8859-1",
utf_16to8(name), pix_height);
return 0;
}
void app_font_gtk1_init(GtkWidget *top_level_w)
{
GtkStyle *style;
char winfont[80];
style = gtk_widget_get_style(top_level_w);
if (get_windows_font_gtk1(winfont, sizeof(winfont)) == 0)
style->font = gdk_font_load(winfont);
if (style->font) gtk_widget_set_style(top_level_w, style);
}
#else /* GTK_MAJOR_VERSION */
static char appfontname[128] = "tahoma 8";
static void
set_app_font_gtk2(const char *fontname)
{
GtkSettings *settings;
if (fontname != NULL && *fontname == 0) return;
settings = gtk_settings_get_default();
if (fontname == NULL) {
g_object_set(G_OBJECT(settings), "gtk-font-name", appfontname, NULL);
} else {
GtkWidget *w;
PangoFontDescription *pfd;
PangoContext *pc;
PangoFont *pfont;
w = gtk_label_new(NULL);
pfd = pango_font_description_from_string(fontname);
pc = gtk_widget_get_pango_context(w);
pfont = pango_context_load_font(pc, pfd);
if (pfont != NULL) {
strcpy(appfontname, fontname);
g_object_set(G_OBJECT(settings), "gtk-font-name", appfontname, NULL);
}
gtk_widget_destroy(w);
pango_font_description_free(pfd);
}
}
static char *default_windows_menu_fontspec_gtk2(void)
{
gchar *fontspec = NULL;
NONCLIENTMETRICS ncm;
memset(&ncm, 0, sizeof ncm);
ncm.cbSize = sizeof ncm;
if (SystemParametersInfo(SPI_GETNONCLIENTMETRICS, ncm.cbSize, &ncm, 0)) {
HDC screen = GetDC(0);
double y_scale = 72.0 / GetDeviceCaps(screen, LOGPIXELSY);
int point_size = (int) (ncm.lfMenuFont.lfHeight * y_scale);
if (point_size < 0) point_size = -point_size;
fontspec = g_strdup_printf("%s %d", ncm.lfMenuFont.lfFaceName,
point_size);
ReleaseDC(0, screen);
}
return fontspec;
}
static void try_to_get_windows_font_gtk2(void)
{
gchar *fontspec;
fontspec = default_windows_menu_fontspec_gtk2();
if (fontspec != NULL) {
int match = 0;
PangoFontDescription *pfd;
PangoFont *pfont;
PangoContext *pc;
GtkWidget *w;
pfd = pango_font_description_from_string(fontspec);
w = gtk_label_new(NULL);
pc = gtk_widget_get_pango_context(w);
pfont = pango_context_load_font(pc, pfd);
match = (pfont != NULL);
pango_font_description_free(pfd);
g_object_unref(G_OBJECT(pc));
gtk_widget_destroy(w);
if (match) set_app_font_gtk2(fontspec);
g_free(fontspec);
}
}
#endif /* GTK_MAJOR_VERSION */
#endif /* _WIN32 */
void font_init(void)
{
#if GTK_MAJOR_VERSION < 2
gchar *bold_font_name;
#endif
#ifdef _WIN32
#if GTK_MAJOR_VERSION >= 2
/* try to load the application font for GTK2 */
try_to_get_windows_font_gtk2();
#endif
#endif
/* Try to load the regular and boldface fixed-width fonts */
#if GTK_MAJOR_VERSION < 2
bold_font_name = user_font_boldify(prefs.gui_font_name1);
m_r_font = gdk_font_load(prefs.gui_font_name1);
m_b_font = gdk_font_load(bold_font_name);
if (m_r_font == NULL || m_b_font == NULL) {
/* XXX - pop this up as a dialog box? no */
if (m_r_font == NULL) {
fprintf(stderr, "wireshark: Warning: font %s not found - defaulting to 6x13 and 6x13bold\n",
prefs.gui_font_name1);
} else {
gdk_font_unref(m_r_font);
}
if (m_b_font == NULL) {
fprintf(stderr, "wireshark: Warning: font %s not found - defaulting to 6x13 and 6x13bold\n",
bold_font_name);
} else {
gdk_font_unref(m_b_font);
}
g_free(bold_font_name);
if ((m_r_font = gdk_font_load("6x13")) == NULL) {
fprintf(stderr, "wireshark: Error: font 6x13 not found\n");
exit(1);
}
if ((m_b_font = gdk_font_load("6x13bold")) == NULL) {
fprintf(stderr, "wireshark: Error: font 6x13bold not found\n");
exit(1);
}
g_free(prefs.gui_font_name1);
prefs.gui_font_name1 = g_strdup("6x13");
}
#else /* GTK_MAJOR_VERSION */
m_r_font = pango_font_description_from_string(prefs.gui_font_name2);
m_b_font = pango_font_description_copy(m_r_font);
pango_font_description_set_weight(m_b_font, PANGO_WEIGHT_BOLD);
if (m_r_font == NULL || m_b_font == NULL) {
/* XXX - pop this up as a dialog box? no */
if (m_r_font == NULL) {
fprintf(stderr, "wireshark: Warning: font %s not found - defaulting to Monospace 9\n",
prefs.gui_font_name2);
} else {
pango_font_description_free(m_r_font);
}
if (m_b_font == NULL) {
fprintf(stderr, "wireshark: Warning: bold font %s not found - defaulting"
" to Monospace 9\n", prefs.gui_font_name2);
} else {
pango_font_description_free(m_b_font);
}
if ((m_r_font = pango_font_description_from_string("Monospace 9")) == NULL)
{
fprintf(stderr, "wireshark: Error: font Monospace 9 not found\n");
exit(1);
}
if ((m_b_font = pango_font_description_copy(m_r_font)) == NULL) {
fprintf(stderr, "wireshark: Error: font Monospace 9 bold not found\n");
exit(1);
}
g_free(prefs.gui_font_name2);
pango_font_description_set_weight(m_b_font, PANGO_WEIGHT_BOLD);
prefs.gui_font_name2 = g_strdup("Monospace 9");
}
#endif /* GTK_MAJOR_VERSION */
/* Call this for the side-effects that set_fonts() produces */
set_fonts(m_r_font, m_b_font);
}
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