Move the UI-independent help URL code to ui/help_url.[ch].

svn path=/trunk/; revision=44987

10 files changed, 545 insertions, 445 deletions

diff --git a/ui/CMakeLists.txt b/ui/CMakeLists.txt
index dbe08cffc7..21421d6347 100644
--- a/ui/CMakeLists.txt
+++ b/ui/CMakeLists.txt
@@ -24,6 +24,7 @@
 
 set(COMMON_UI_SRC
 	alert_box.c
+	help_url.c
 	iface_lists.c
 	text_import.c
 	util.c
diff --git a/ui/Makefile.common b/ui/Makefile.common
index 7bad41ae33..9b373a851d 100644
--- a/ui/Makefile.common
+++ b/ui/Makefile.common
@@ -46,6 +46,7 @@ GENERATOR_FILES = \
 WIRESHARK_UI_SRC = \
 	alert_box.c	\
 	iface_lists.c	\
+	help_url.c	\
 	text_import.c	\
 	util.c
 
@@ -53,6 +54,7 @@ noinst_HEADERS = \
 	alert_box.h		\
 	capture_globals.h	\
 	last_open_dir.h		\
+	help_url.h		\
 	iface_lists.h		\
 	main_statusbar.h	\
 	progress_dlg.h		\
diff --git a/ui/gtk/help_dlg.c b/ui/gtk/help_dlg.c
index bcb0376f86..262905e794 100644
--- a/ui/gtk/help_dlg.c
+++ b/ui/gtk/help_dlg.c
@@ -26,13 +26,11 @@
 #ifdef HAVE_CONFIG_H
 # include "config.h"
 #endif
-#include <string.h>
 #include <stdio.h>
 #include <errno.h>
 
 #include <gtk/gtk.h>
 
-#include "epan/filesystem.h"
 #include <epan/prefs.h>
 
 #include "ui/simple_dialog.h"
@@ -44,16 +42,8 @@
 #include "ui/gtk/dlg_utils.h"
 #include "ui/gtk/webbrowser.h"
 
-#ifdef HHC_DIR
-#include <windows.h>
-#include <htmlhelp.h>
-#include <wsutil/unicode-utils.h>
-#endif
-
 
 #define HELP_DIR        "help"
-
-
 #define NOTEBOOK_KEY    "notebook_key"
 
 /*
@@ -77,52 +67,6 @@ typedef struct {
 static GSList *help_text_pages = NULL;
 
 
-/*
- * Open the help dialog and show a specific HTML help page.
- */
-void help_topic_html(const gchar *topic) {
-    GString *url;
-
-    /* try to open local .chm file */
-#ifdef HHC_DIR
-    HWND hw;
-
-    url = g_string_new("");
-
-    g_string_append_printf(url, "%s\\user-guide.chm::/wsug_chm/%s>Wireshark Help",
-        get_datafile_dir(), topic);
-
-    hw = HtmlHelpW(NULL,
-        utf_8to16(url->str),
-        HH_DISPLAY_TOPIC, 0);
-
-    g_string_free(url, TRUE /* free_segment */);
-
-    /* if the .chm file could be opened, stop here */
-    if(hw != NULL) {
-        return;
-    }
-#endif /* HHC_DIR */
-
-    url = g_string_new("");
-
-#ifdef DOC_DIR
-    if (g_file_test(DOC_DIR "/guides/wsug_html_chunked", G_FILE_TEST_IS_DIR)) {
-        /* try to open the HTML page from wireshark.org instead */
-        g_string_append_printf(url, "file://" DOC_DIR "/guides/wsug_html_chunked/%s", topic);
-    } else {
-#endif /* ifdef DOC_DIR */
-       /* try to open the HTML page from wireshark.org instead */
-        g_string_append_printf(url, "http://www.wireshark.org/docs/wsug_html_chunked/%s", topic);
-#ifdef DOC_DIR
-    }
-#endif /* ifdef DOC_DIR */
-
-    browser_open_url(url->str);
-
-    g_string_free(url, TRUE /* free_segment */);
-}
-
 
 /**
  * Redraw all help pages, to use a new font.
@@ -143,221 +87,16 @@ void help_redraw(void)
 }
 
 
-const char *
-topic_online_url(topic_action_e action)
-{
-    switch(action) {
-    case(ONLINEPAGE_HOME):
-        return "http://www.wireshark.org";
-        break;
-    case(ONLINEPAGE_WIKI):
-        return "http://wiki.wireshark.org";
-        break;
-    case(ONLINEPAGE_DOWNLOAD):
-        return "http://www.wireshark.org/download.html";
-        break;
-    case(ONLINEPAGE_USERGUIDE):
-        return "http://www.wireshark.org/docs/wsug_html_chunked/";
-        break;
-    case(ONLINEPAGE_FAQ):
-        return "http://www.wireshark.org/faq.html";
-        break;
-    case(ONLINEPAGE_ASK):
-        return "http://ask.wireshark.org";
-        break;
-    case(ONLINEPAGE_SAMPLE_FILES):
-        return "http://wiki.wireshark.org/SampleCaptures";
-        break;
-    case(ONLINEPAGE_CAPTURE_SETUP):
-        return "http://wiki.wireshark.org/CaptureSetup";
-        break;
-    case(ONLINEPAGE_NETWORK_MEDIA):
-        return "http://wiki.wireshark.org/CaptureSetup/NetworkMedia";
-        break;
-    case(ONLINEPAGE_SAMPLE_CAPTURES):
-        return "http://wiki.wireshark.org/SampleCaptures";
-        break;
-    case(ONLINEPAGE_SECURITY):
-        return "http://wiki.wireshark.org/Security";
-        break;
-    case(ONLINEPAGE_CHIMNEY):
-        return "http://wiki.wireshark.org/CaptureSetup/Offloading#chimney";
-        break;
-    default:
-        return NULL;
-    }
-}
-
-
 static void
 topic_action(topic_action_e action)
 {
-    const char *online_url;
+    char *url;
 
+    url = topic_action_url(action);
 
-    /* pages online at www.wireshark.org */
-    online_url = topic_online_url(action);
-    if(online_url != NULL) {
-        browser_open_url (online_url);
-        return;
-    }
-
-    switch(action) {
-    /* local manual pages */
-    case(LOCALPAGE_MAN_WIRESHARK):
-        browser_open_data_file("wireshark.html");
-        break;
-    case(LOCALPAGE_MAN_WIRESHARK_FILTER):
-        browser_open_data_file("wireshark-filter.html");
-        break;
-    case(LOCALPAGE_MAN_TSHARK):
-        browser_open_data_file("tshark.html");
-        break;
-    case(LOCALPAGE_MAN_RAWSHARK):
-        browser_open_data_file("rawshark.html");
-        break;
-    case(LOCALPAGE_MAN_DUMPCAP):
-        browser_open_data_file("dumpcap.html");
-        break;
-    case(LOCALPAGE_MAN_MERGECAP):
-        browser_open_data_file("mergecap.html");
-        break;
-    case(LOCALPAGE_MAN_EDITCAP):
-        browser_open_data_file("editcap.html");
-        break;
-    case(LOCALPAGE_MAN_TEXT2PCAP):
-        browser_open_data_file("text2pcap.html");
-        break;
-
-    /* local help pages (User's Guide) */
-    case(HELP_CONTENT):
-        help_topic_html( "index.html");
-        break;
-    case(HELP_CAPTURE_OPTIONS_DIALOG):
-        help_topic_html("ChCapCaptureOptions.html");
-        break;
-    case(HELP_CAPTURE_FILTERS_DIALOG):
-        help_topic_html("ChWorkDefineFilterSection.html");
-        break;
-    case(HELP_DISPLAY_FILTERS_DIALOG):
-        help_topic_html("ChWorkDefineFilterSection.html");
-        break;
-    case(HELP_COLORING_RULES_DIALOG):
-        help_topic_html("ChCustColorizationSection.html");
-        break;
-    case(HELP_CONFIG_PROFILES_DIALOG):
-        help_topic_html("ChCustConfigProfilesSection.html");
-        break;
-    case (HELP_MANUAL_ADDR_RESOLVE_DIALOG):
-        help_topic_html("ChManualAddressResolveSection.html");
-        break;
-    case(HELP_PRINT_DIALOG):
-        help_topic_html("ChIOPrintSection.html");
-        break;
-    case(HELP_FIND_DIALOG):
-        help_topic_html("ChWorkFindPacketSection.html");
-        break;
-    case(HELP_FIREWALL_DIALOG):
-        help_topic_html("ChUseToolsMenuSection.html");
-        break;
-    case(HELP_GOTO_DIALOG):
-        help_topic_html("ChWorkGoToPacketSection.html");
-        break;
-    case(HELP_CAPTURE_INTERFACES_DIALOG):
-        help_topic_html("ChCapInterfaceSection.html");
-        break;
-    case(HELP_CAPTURE_INFO_DIALOG):
-        help_topic_html("ChCapRunningSection.html");
-        break;
-    case(HELP_ENABLED_PROTOCOLS_DIALOG):
-        help_topic_html("ChCustProtocolDissectionSection.html");
-        break;
-    case(HELP_DECODE_AS_DIALOG):
-        help_topic_html("ChCustProtocolDissectionSection.html");
-        break;
-    case(HELP_DECODE_AS_SHOW_DIALOG):
-        help_topic_html("ChCustProtocolDissectionSection.html");
-        break;
-    case(HELP_FOLLOW_STREAM_DIALOG):
-        help_topic_html("ChAdvFollowTCPSection.html");
-        break;
-    case(HELP_EXPERT_INFO_DIALOG):
-        help_topic_html("ChAdvExpert.html");
-        break;
-    case(HELP_STATS_SUMMARY_DIALOG):
-        help_topic_html("ChStatSummary.html");
-        break;
-    case(HELP_STATS_PROTO_HIERARCHY_DIALOG):
-        help_topic_html("ChStatHierarchy.html");
-        break;
-    case(HELP_STATS_ENDPOINTS_DIALOG):
-        help_topic_html("ChStatEndpoints.html");
-        break;
-    case(HELP_STATS_CONVERSATIONS_DIALOG):
-        help_topic_html("ChStatConversations.html");
-        break;
-    case(HELP_STATS_IO_GRAPH_DIALOG):
-        help_topic_html("ChStatIOGraphs.html");
-        break;
-    case(HELP_STATS_COMPARE_FILES_DIALOG):
-        help_topic_html("ChStatCompareCaptureFiles.html");
-        break;
-    case(HELP_STATS_LTE_MAC_TRAFFIC_DIALOG):
-        help_topic_html("ChTelLTEMACTraffic.html");
-        break;
-    case(HELP_STATS_LTE_RLC_TRAFFIC_DIALOG):
-        help_topic_html("ChTelLTERLCTraffic.html");
-        break;
-    case(HELP_STATS_WLAN_TRAFFIC_DIALOG):
-        help_topic_html("ChStatWLANTraffic.html");
-        break;
-    case(HELP_FILESET_DIALOG):
-        help_topic_html("ChIOFileSetSection.html");
-        break;
-    case(HELP_CAPTURE_INTERFACE_OPTIONS_DIALOG):
-        help_topic_html("ChCustPreferencesSection.html#ChCustInterfaceOptionsSection");
-        break;
-    case(HELP_CAPTURE_INTERFACES_DETAILS_DIALOG):
-        help_topic_html("ChCapInterfaceDetailsSection.html");
-        break;
-    case(HELP_PREFERENCES_DIALOG):
-        help_topic_html("ChCustPreferencesSection.html");
-        break;
-    case(HELP_EXPORT_FILE_DIALOG):
-    case(HELP_EXPORT_FILE_WIN32_DIALOG):
-        help_topic_html("ChIOExportSection.html");
-        break;
-    case(HELP_EXPORT_BYTES_DIALOG):
-    case(HELP_EXPORT_BYTES_WIN32_DIALOG):
-        help_topic_html("ChIOExportSection.html#ChIOExportSelectedDialog");
-        break;
-    case(HELP_EXPORT_OBJECT_LIST):
-        help_topic_html("ChIOExportSection.html#ChIOExportObjectsDialog");
-        break;
-    case(HELP_OPEN_DIALOG):
-    case(HELP_OPEN_WIN32_DIALOG):
-        help_topic_html("ChIOOpenSection.html");
-        break;
-    case(HELP_MERGE_DIALOG):
-    case(HELP_MERGE_WIN32_DIALOG):
-        help_topic_html("ChIOMergeSection.html");
-        break;
-    case(HELP_IMPORT_DIALOG):
-        help_topic_html("ChIOImportSection.html");
-        break;
-    case(HELP_SAVE_DIALOG):
-    case(HELP_SAVE_WIN32_DIALOG):
-        help_topic_html("ChIOSaveSection.html");
-        break;
-    case(HELP_TIME_SHIFT_DIALOG):
-        help_topic_html("ChWorkShiftTimePacketSection.html");
-        break;
-    case(HELP_FILTER_SAVE_DIALOG):
-        help_topic_html("ChWorkFilterSaveSection.html");
-        break;
-
-    default:
-        g_assert_not_reached();
+    if(url != NULL) {
+        browser_open_url(url);
+        g_free(url);
     }
 }
 
@@ -375,4 +114,3 @@ topic_menu_cb(GtkWidget *w _U_, GdkEventButton *event _U_, gpointer user_data)
     topic_action((topic_action_e)GPOINTER_TO_INT(user_data));
     return TRUE;
 }
-
diff --git a/ui/gtk/help_dlg.h b/ui/gtk/help_dlg.h
index ed8ddd0355..955c7b83f5 100644
--- a/ui/gtk/help_dlg.h
+++ b/ui/gtk/help_dlg.h
@@ -27,85 +27,13 @@
 #ifndef __HELP_DLG_H__
 #define __HELP_DLG_H__
 
+#include "ui/help_url.h"
+
 /** @file
  * "Help" dialog box.
  *  @ingroup dialog_group
  */
 
-typedef enum {
-    /* pages online at www.wireshark.org */
-    ONLINEPAGE_HOME,
-    ONLINEPAGE_WIKI,
-    ONLINEPAGE_USERGUIDE,
-    ONLINEPAGE_FAQ,
-    ONLINEPAGE_DOWNLOAD,
-    ONLINEPAGE_SAMPLE_FILES,
-    ONLINEPAGE_CAPTURE_SETUP,
-    ONLINEPAGE_NETWORK_MEDIA,
-    ONLINEPAGE_SAMPLE_CAPTURES,
-    ONLINEPAGE_SECURITY,
-    ONLINEPAGE_CHIMNEY,
-    ONLINEPAGE_ASK,
-
-    /* local manual pages */
-    LOCALPAGE_MAN_WIRESHARK = 100,
-    LOCALPAGE_MAN_WIRESHARK_FILTER,
-    LOCALPAGE_MAN_TSHARK,
-    LOCALPAGE_MAN_RAWSHARK,
-    LOCALPAGE_MAN_DUMPCAP,
-    LOCALPAGE_MAN_MERGECAP,
-    LOCALPAGE_MAN_EDITCAP,
-    LOCALPAGE_MAN_TEXT2PCAP,
-
-    /* help pages (textfiles or local HTML User's Guide) */
-    HELP_CONTENT = 200,
-    HELP_GETTING_STARTED,           /* currently unused */
-    HELP_CAPTURE_OPTIONS_DIALOG,
-    HELP_CAPTURE_FILTERS_DIALOG,
-    HELP_DISPLAY_FILTERS_DIALOG,
-    HELP_COLORING_RULES_DIALOG,
-    HELP_CONFIG_PROFILES_DIALOG,
-    HELP_MANUAL_ADDR_RESOLVE_DIALOG,
-    HELP_PRINT_DIALOG,
-    HELP_FIND_DIALOG,
-    HELP_FILESET_DIALOG,
-    HELP_FIREWALL_DIALOG,
-    HELP_GOTO_DIALOG,
-    HELP_CAPTURE_INTERFACES_DIALOG,
-    HELP_ENABLED_PROTOCOLS_DIALOG,
-    HELP_DECODE_AS_DIALOG,
-    HELP_DECODE_AS_SHOW_DIALOG,
-    HELP_FOLLOW_STREAM_DIALOG,
-    HELP_EXPERT_INFO_DIALOG,
-    HELP_STATS_SUMMARY_DIALOG,
-    HELP_STATS_PROTO_HIERARCHY_DIALOG,
-    HELP_STATS_ENDPOINTS_DIALOG,
-    HELP_STATS_CONVERSATIONS_DIALOG,
-    HELP_STATS_IO_GRAPH_DIALOG,
-    HELP_STATS_COMPARE_FILES_DIALOG,
-    HELP_STATS_LTE_MAC_TRAFFIC_DIALOG,
-    HELP_STATS_LTE_RLC_TRAFFIC_DIALOG,
-    HELP_STATS_WLAN_TRAFFIC_DIALOG,
-    HELP_CAPTURE_INTERFACE_OPTIONS_DIALOG,
-    HELP_CAPTURE_INTERFACES_DETAILS_DIALOG,
-    HELP_PREFERENCES_DIALOG,
-    HELP_CAPTURE_INFO_DIALOG,
-    HELP_EXPORT_FILE_DIALOG,
-    HELP_EXPORT_BYTES_DIALOG,
-    HELP_EXPORT_OBJECT_LIST,
-    HELP_OPEN_DIALOG,
-    HELP_MERGE_DIALOG,
-    HELP_IMPORT_DIALOG,
-    HELP_SAVE_DIALOG,
-    HELP_EXPORT_FILE_WIN32_DIALOG,
-    HELP_EXPORT_BYTES_WIN32_DIALOG,
-    HELP_OPEN_WIN32_DIALOG,
-    HELP_MERGE_WIN32_DIALOG,
-    HELP_SAVE_WIN32_DIALOG,
-    HELP_TIME_SHIFT_DIALOG,
-    HELP_FILTER_SAVE_DIALOG
-} topic_action_e;
-
 
 /** Open a specific topic (create a "Help" dialog box or open a webpage).
  *
@@ -126,12 +54,4 @@ gboolean topic_menu_cb(GtkWidget *widget _U_, GdkEventButton *event _U_, gpointe
 /** Redraw all the help dialog text widgets, to use a new font. */
 void help_redraw(void);
 
-
-/** Open the help dialog and show a specific HTML help page. */
-void help_topic_html(const gchar *topic);
-
-/** get the url string of one of the ONLINEPAGE_xxx values */
-const char *topic_online_url(topic_action_e action);
-
-
 #endif
diff --git a/ui/gtk/hostlist_table.c b/ui/gtk/hostlist_table.c
index bfe8d5ff7c..907f8a1305 100644
--- a/ui/gtk/hostlist_table.c
+++ b/ui/gtk/hostlist_table.c
@@ -1156,7 +1156,7 @@ open_as_map_cb(GtkWindow *copy_bt, gpointer data _U_)
     }
 
     /* open the webbrowser */
-    file_uri = filename2uri(map_filename);
+    file_uri = g_filename_to_uri(map_filename, NULL, NULL);
     g_free(map_filename);
     uri_open = browser_open_url (file_uri);
     if(!uri_open) {
diff --git a/ui/gtk/uat_gui.c b/ui/gtk/uat_gui.c
index 3cfee08015..5b7816965a 100644
--- a/ui/gtk/uat_gui.c
+++ b/ui/gtk/uat_gui.c
@@ -5,23 +5,23 @@
  *
  *  User Accessible Tables GUI
  *  Mantain an array of user accessible data strucures
- *  
+ *
  * (c) 2007, Luis E. Garcia Ontanon <luis@ontanon.org>
  *
  * Wireshark - Network traffic analyzer
  * By Gerald Combs <gerald@wireshark.org>
  * Copyright 2001 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.
@@ -61,15 +61,16 @@
 
 #include "../stat_menu.h"
 
+#include "ui/help_url.h"
 #include "ui/gtk/gtkglobals.h"
 #include "ui/gtk/gui_utils.h"
 #include "ui/gtk/dlg_utils.h"
-#include "ui/gtk/help_dlg.h"
 #include "ui/gtk/stock_icons.h"
 #include "ui/gtk/gui_stat_menu.h"
 #include "ui/gtk/main.h"
 #include "ui/gtk/uat_gui.h"
 #include "ui/gtk/packet_list.h"
+#include "ui/gtk/webbrowser.h"
 #include "ui/gtk/old-gtk-compat.h"
 
 # define BUTTON_SIZE_X -1
@@ -167,14 +168,14 @@ static char* fld_tostr(void* rec, uat_field_t* f) {
 		case PT_TXTMOD_HEXBYTES: {
 			GString* s = g_string_sized_new( len*2 + 1 );
 			guint i;
-			
+
 			for (i=0; i<len;i++) g_string_append_printf(s,"%.2X",((guint8*)ptr)[i]);
-			
+
 			out = ep_strdup(s->str);
-			
+
 			g_string_free(s,TRUE);
 			break;
-		} 
+		}
 		default:
 			g_assert_not_reached();
 			out = NULL;
@@ -276,7 +277,7 @@ static guint8* unhexbytes(const char* si, guint len, guint* len_p, const char**
 
 	*err = NULL;
 	return buf;
-	
+
 on_error:
 	*err = "Error parsing hex string";
 	return NULL;
@@ -366,7 +367,7 @@ static gboolean uat_dlg_cb(GtkWidget *win _U_, gpointer user_data) {
 
 		g_free(rec_tmp);
 	}
-	
+
 	dd->uat->changed = TRUE;
 
 	set_buttons(dd->uat, dd->uat->rep ? dd->uat->rep->selected : -1);
@@ -421,7 +422,7 @@ static void uat_edit_dialog(uat_t* uat, gint row, gboolean copy) {
 	struct _uat_dlg_data* dd = g_malloc(sizeof(struct _uat_dlg_data));
 	uat_field_t* f = uat->fields;
 	guint colnum;
-	
+
 	dd->entries = g_ptr_array_new();
 	dd->win = dlg_conf_window_new(ep_strdup_printf("%s: %s", uat->name, (row == -1 ? "New" : "Edit")));
 	dd->uat = uat;
@@ -514,7 +515,7 @@ static void uat_edit_dialog(uat_t* uat, gint row, gboolean copy) {
 				for (idx = 0; enum_vals[idx].strptr != NULL; idx++) {
 					const char* str = enum_vals[idx].strptr;
 					 gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT(combo_box), str);
-					
+
 					if ( g_str_equal(str, text) ) {
 						*valptr = idx;
 					}
@@ -536,7 +537,7 @@ static void uat_edit_dialog(uat_t* uat, gint row, gboolean copy) {
 				return;
 		}
 	}
-	
+
 	gtk_widget_grab_default(bt_ok);
 	gtk_widget_show_all(win);
 }
@@ -591,7 +592,7 @@ static void uat_del_dlg(uat_t* uat, int idx) {
 	ud->uat = uat;
 	ud->idx = idx;
 	ud->win = win = dlg_conf_window_new(ep_strdup_printf("%s: Confirm Delete", uat->name));
-	
+
 	gtk_window_set_resizable(GTK_WINDOW(win),FALSE);
 	gtk_window_resize(GTK_WINDOW(win),400,25*(uat->ncols+2));
 
@@ -611,7 +612,7 @@ static void uat_del_dlg(uat_t* uat, int idx) {
 		label = gtk_label_new(ep_strdup_printf("%s:", f[colnum].title));
 		gtk_misc_set_alignment(GTK_MISC(label), 1.0f, 0.5f);
 		gtk_table_attach_defaults(GTK_TABLE(main_tb), label, 0, 1, colnum+1, colnum + 2);
-		
+
 		label = gtk_label_new(text);
 		gtk_misc_set_alignment(GTK_MISC(label), 1.0f, 0.5f);
 		gtk_table_attach_defaults(GTK_TABLE(main_tb), label, 1, 2, colnum+1, colnum + 2);
@@ -668,7 +669,7 @@ static void uat_delete_cb(GtkButton *button _U_, gpointer u) {
 
 static gboolean uat_window_delete_event_cb(GtkWindow *w _U_, GdkEvent* e _U_, gpointer u) {
 	uat_t* uat = u;
-	
+
 	if (uat->rep) {
 		void* rep = uat->rep;
 
@@ -900,7 +901,15 @@ static gboolean unsaved_dialog(GtkWindow *w _U_, GdkEvent* e _U_, gpointer u) {
 }
 
 static void uat_help_cb(GtkWidget* w _U_, gpointer u) {
-	help_topic_html(ep_strdup_printf("%s.html",((uat_t*)u)->help));
+	gchar *help_page, *url;
+
+	help_page = g_strdup_printf("%s.html",((uat_t*)u)->help);
+	url = user_guide_url(help_page);
+	if (url) {
+		browser_open_url(url);
+	}
+	g_free(help_page);
+	g_free(url);
 }
 
 static GtkWidget* uat_window(void* u) {
@@ -988,7 +997,7 @@ static GtkWidget* uat_window(void* u) {
 	} else {
 
 		rep->bbox = dlg_button_row_new(GTK_STOCK_OK, GTK_STOCK_APPLY, GTK_STOCK_CANCEL, NULL);
-	}	
+	}
 
 	move_hbox = gtk_button_box_new(GTK_ORIENTATION_VERTICAL);
 	gtk_box_pack_start(GTK_BOX(vbox), move_hbox, TRUE, FALSE, 0);
@@ -1078,7 +1087,7 @@ static GtkWidget* uat_window(void* u) {
 		g_signal_connect(GTK_WINDOW(rep->window), "delete_event", G_CALLBACK(uat_window_delete_event_cb), uat);
 		g_signal_connect(GTK_WINDOW(rep->window), "destroy", G_CALLBACK(uat_window_delete_event_cb), uat);
 	}
-	
+
 	gtk_widget_grab_focus(GTK_WIDGET(rep->list));
 
 	gtk_widget_show_all(rep->window);
@@ -1090,4 +1099,3 @@ static GtkWidget* uat_window(void* u) {
 void uat_window_cb(GtkWidget* u _U_, void* uat) {
 	uat_window(uat);
 }
-
diff --git a/ui/gtk/webbrowser.c b/ui/gtk/webbrowser.c
index 196efdf04d..06514c2ddc 100644
--- a/ui/gtk/webbrowser.c
+++ b/ui/gtk/webbrowser.c
@@ -76,6 +76,7 @@
 #include <epan/prefs.h>
 
 #include "ui/simple_dialog.h"
+#include "ui/help_url.h"
 
 #include "ui/gtk/webbrowser.h"
 
@@ -262,55 +263,6 @@ browser_open_url (const gchar *url)
 #endif
 }
 
-/** Convert local absolute path to uri.
- *
- * @param filename to (absolute pathed) filename to convert
- * @return a newly allocated uri, you must g_free it later
- */
-gchar *
-filename2uri(const gchar *filename)
-{
-    int i = 0;
-    gchar *file_tmp;
-    GString *filestr;
-
-
-    filestr = g_string_sized_new(200);
-
-    /* this escaping is somewhat slow but should working fine */
-    for(i=0; filename[i]; i++) {
-        switch(filename[i]) {
-        case(' '):
-            g_string_append(filestr, "%20");
-            break;
-        case('%'):
-            g_string_append(filestr, "%%");
-            break;
-        case('\\'):
-            g_string_append_c(filestr, '/');
-            break;
-            /* XXX - which other chars need to be escaped? */
-        default:
-            g_string_append_c(filestr, filename[i]);
-        }
-    }
-
-
-    /* prepend URI header "file:" appropriate for the system */
-#ifdef G_OS_WIN32
-    /* XXX - how do we handle UNC names (e.g. //servername/sharename/dir1/dir2/capture-file.cap) */
-    g_string_prepend(filestr, "file:///");
-#else
-    g_string_prepend(filestr, "file://");
-#endif
-
-    file_tmp = filestr->str;
-
-    g_string_free(filestr, FALSE /* don't free segment data */);
-
-    return file_tmp;
-}
-
 gboolean
 filemanager_open_directory (const gchar *path)
 {
@@ -414,7 +366,7 @@ filemanager_open_directory (const gchar *path)
     }
 
   /* conver the path to a URI */
-  argument = filename2uri (path);
+  argument = g_filename_to_uri(path);
 
   /* replace %s with URL */
   if (strstr (browser, "%s"))
@@ -491,30 +443,14 @@ strreplace (const gchar *string,
 void
 browser_open_data_file(const gchar *filename)
 {
-    gchar *file_path;
     gchar *uri;
 
-    /* build filename */
-#ifdef G_OS_WIN32
-    if((strlen(filename) > 2) && (filename[1] == ':'))
-      file_path = g_strdup(filename);
-#else
-    /* XXX: is this correct for MacOS/Linux ? */
-    if((strlen(filename) > 1) && (filename[0] == '/'))
-      file_path = g_strdup(filename);
-#endif 
-    else
-
-    file_path = g_strdup_printf("%s/%s", get_datafile_dir(), filename);
-
     /* XXX - check, if the file is really existing, otherwise display a simple_dialog about the problem */
 
-    /* convert filename to uri */
-    uri = filename2uri(file_path);
+    uri = data_file_url(filename);
 
     /* show the uri */
     browser_open_url (uri);
 
-    g_free(file_path);
     g_free(uri);
 }
diff --git a/ui/gtk/webbrowser.h b/ui/gtk/webbrowser.h
index 1436f84aab..7e4b1c0ef7 100644
--- a/ui/gtk/webbrowser.h
+++ b/ui/gtk/webbrowser.h
@@ -34,11 +34,4 @@ extern gboolean filemanager_open_directory (const gchar *path);
 /* browse a file relative to the data dir */
 extern void browser_open_data_file (const gchar *filename);
 
-/** Convert local absolute path to uri.
- *
- * @param filename to (absolute pathed) filename to convert
- * @return a newly allocated uri, you must g_free it later
- */
-extern gchar *filename2uri(const gchar *filename);
-
 #endif /* __WEBBROWSER_H__ */
diff --git a/ui/help_url.c b/ui/help_url.c
new file mode 100644
index 0000000000..215264e907
--- /dev/null
+++ b/ui/help_url.c
@@ -0,0 +1,349 @@
+/* help_url.c
+ *
+ * $Id$
+ *
+ * Some content from gtk/help_dlg.c by Laurent Deniel <laurent.deniel@free.fr>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 2000 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <string.h>
+
+#include <glib.h>
+
+#include "help_url.h"
+#include "epan/filesystem.h"
+
+#ifdef HHC_DIR
+#include <windows.h>
+#include <htmlhelp.h>
+#include <wsutil/unicode-utils.h>
+#endif
+
+/*
+ * Given a filename return a filesystem URL. Relative paths are prefixed with
+ * the datafile directory path.
+ */
+gchar *
+data_file_url(const gchar *filename)
+{
+    gchar *file_path;
+    gchar *uri;
+
+    /* Absolute path? */
+#ifdef G_OS_WIN32
+    if((strlen(filename) > 2) && (filename[1] == ':')) {
+      file_path = g_strdup(filename);
+#else
+    if((strlen(filename) > 1) && (filename[0] == '/')) {
+      file_path = g_strdup(filename);
+#endif
+    } else {
+        file_path = g_strdup_printf("%s/%s", get_datafile_dir(), filename);
+    }
+
+    /* XXX - check, if the file is really existing, otherwise display a simple_dialog about the problem */
+
+    /* convert filename to uri */
+    uri = g_filename_to_uri(file_path, NULL, NULL);
+    g_free(file_path);
+    return uri;
+}
+
+const char *
+topic_online_url(topic_action_e action)
+{
+    switch(action) {
+    case(ONLINEPAGE_HOME):
+        return "http://www.wireshark.org";
+        break;
+    case(ONLINEPAGE_WIKI):
+        return "http://wiki.wireshark.org";
+        break;
+    case(ONLINEPAGE_DOWNLOAD):
+        return "http://www.wireshark.org/download.html";
+        break;
+    case(ONLINEPAGE_USERGUIDE):
+        return "http://www.wireshark.org/docs/wsug_html_chunked/";
+        break;
+    case(ONLINEPAGE_FAQ):
+        return "http://www.wireshark.org/faq.html";
+        break;
+    case(ONLINEPAGE_ASK):
+        return "http://ask.wireshark.org";
+        break;
+    case(ONLINEPAGE_SAMPLE_FILES):
+        return "http://wiki.wireshark.org/SampleCaptures";
+        break;
+    case(ONLINEPAGE_CAPTURE_SETUP):
+        return "http://wiki.wireshark.org/CaptureSetup";
+        break;
+    case(ONLINEPAGE_NETWORK_MEDIA):
+        return "http://wiki.wireshark.org/CaptureSetup/NetworkMedia";
+        break;
+    case(ONLINEPAGE_SAMPLE_CAPTURES):
+        return "http://wiki.wireshark.org/SampleCaptures";
+        break;
+    case(ONLINEPAGE_SECURITY):
+        return "http://wiki.wireshark.org/Security";
+        break;
+    case(ONLINEPAGE_CHIMNEY):
+        return "http://wiki.wireshark.org/CaptureSetup/Offloading#chimney";
+        break;
+    default:
+        return NULL;
+    }
+}
+
+/*
+ * Open the help dialog and show a specific HTML help page.
+ */
+gchar *
+user_guide_url(const gchar *page) {
+    GString *url = g_string_new("");
+    gchar *ug_url = NULL;
+
+    /*
+     * Try to open local .chm file. This is not the most intuitive way to
+     * go about this but it fits in with the rest of the _url functions.
+     */
+#ifdef HHC_DIR
+    HWND hw;
+
+    g_string_printf(url, "%s\\user-guide.chm::/wsug_chm/%s>Wireshark Help",
+        get_datafile_dir(), topic);
+
+    hw = HtmlHelpW(NULL,
+        utf_8to16(url->str),
+        HH_DISPLAY_TOPIC, 0);
+
+    g_string_free(url, TRUE /* free_segment */);
+
+    /* if the .chm file could be opened, stop here */
+    if(hw != NULL) {
+        return NULL;
+    }
+#endif /* HHC_DIR */
+
+#ifdef DOC_DIR
+    if (g_file_test(DOC_DIR "/guides/wsug_html_chunked", G_FILE_TEST_IS_DIR)) {
+        /* try to open the HTML page from wireshark.org instead */
+        g_string_printf(url, "file://" DOC_DIR "/guides/wsug_html_chunked/%s", page);
+    } else {
+#endif /* ifdef DOC_DIR */
+       /* try to open the HTML page from wireshark.org instead */
+        g_string_printf(url, "http://www.wireshark.org/docs/wsug_html_chunked/%s", page);
+#ifdef DOC_DIR
+    }
+#endif /* ifdef DOC_DIR */
+
+
+    ug_url = url->str;
+    g_string_free(url, FALSE);
+    return ug_url;
+}
+
+gchar *
+topic_action_url(topic_action_e action)
+{
+    gchar *url;
+
+    /* pages online at www.wireshark.org */
+    url = g_strdup(topic_online_url(action));
+    if(url != NULL) {
+        return url;
+    }
+
+    switch(action) {
+    /* local manual pages */
+    case(LOCALPAGE_MAN_WIRESHARK):
+        url = data_file_url("wireshark.html");
+        break;
+    case(LOCALPAGE_MAN_WIRESHARK_FILTER):
+        url = data_file_url("wireshark-filter.html");
+        break;
+    case(LOCALPAGE_MAN_TSHARK):
+        url = data_file_url("tshark.html");
+        break;
+    case(LOCALPAGE_MAN_RAWSHARK):
+        url = data_file_url("rawshark.html");
+        break;
+    case(LOCALPAGE_MAN_DUMPCAP):
+        url = data_file_url("dumpcap.html");
+        break;
+    case(LOCALPAGE_MAN_MERGECAP):
+        url = data_file_url("mergecap.html");
+        break;
+    case(LOCALPAGE_MAN_EDITCAP):
+        url = data_file_url("editcap.html");
+        break;
+    case(LOCALPAGE_MAN_TEXT2PCAP):
+        url = data_file_url("text2pcap.html");
+        break;
+
+    /* local help pages (User's Guide) */
+    case(HELP_CONTENT):
+        url = user_guide_url( "index.html");
+        break;
+    case(HELP_CAPTURE_OPTIONS_DIALOG):
+        url = user_guide_url("ChCapCaptureOptions.html");
+        break;
+    case(HELP_CAPTURE_FILTERS_DIALOG):
+        url = user_guide_url("ChWorkDefineFilterSection.html");
+        break;
+    case(HELP_DISPLAY_FILTERS_DIALOG):
+        url = user_guide_url("ChWorkDefineFilterSection.html");
+        break;
+    case(HELP_COLORING_RULES_DIALOG):
+        url = user_guide_url("ChCustColorizationSection.html");
+        break;
+    case(HELP_CONFIG_PROFILES_DIALOG):
+        url = user_guide_url("ChCustConfigProfilesSection.html");
+        break;
+    case (HELP_MANUAL_ADDR_RESOLVE_DIALOG):
+        url = user_guide_url("ChManualAddressResolveSection.html");
+        break;
+    case(HELP_PRINT_DIALOG):
+        url = user_guide_url("ChIOPrintSection.html");
+        break;
+    case(HELP_FIND_DIALOG):
+        url = user_guide_url("ChWorkFindPacketSection.html");
+        break;
+    case(HELP_FIREWALL_DIALOG):
+        url = user_guide_url("ChUseToolsMenuSection.html");
+        break;
+    case(HELP_GOTO_DIALOG):
+        url = user_guide_url("ChWorkGoToPacketSection.html");
+        break;
+    case(HELP_CAPTURE_INTERFACES_DIALOG):
+        url = user_guide_url("ChCapInterfaceSection.html");
+        break;
+    case(HELP_CAPTURE_INFO_DIALOG):
+        url = user_guide_url("ChCapRunningSection.html");
+        break;
+    case(HELP_ENABLED_PROTOCOLS_DIALOG):
+        url = user_guide_url("ChCustProtocolDissectionSection.html");
+        break;
+    case(HELP_DECODE_AS_DIALOG):
+        url = user_guide_url("ChCustProtocolDissectionSection.html");
+        break;
+    case(HELP_DECODE_AS_SHOW_DIALOG):
+        url = user_guide_url("ChCustProtocolDissectionSection.html");
+        break;
+    case(HELP_FOLLOW_STREAM_DIALOG):
+        url = user_guide_url("ChAdvFollowTCPSection.html");
+        break;
+    case(HELP_EXPERT_INFO_DIALOG):
+        url = user_guide_url("ChAdvExpert.html");
+        break;
+    case(HELP_STATS_SUMMARY_DIALOG):
+        url = user_guide_url("ChStatSummary.html");
+        break;
+    case(HELP_STATS_PROTO_HIERARCHY_DIALOG):
+        url = user_guide_url("ChStatHierarchy.html");
+        break;
+    case(HELP_STATS_ENDPOINTS_DIALOG):
+        url = user_guide_url("ChStatEndpoints.html");
+        break;
+    case(HELP_STATS_CONVERSATIONS_DIALOG):
+        url = user_guide_url("ChStatConversations.html");
+        break;
+    case(HELP_STATS_IO_GRAPH_DIALOG):
+        url = user_guide_url("ChStatIOGraphs.html");
+        break;
+    case(HELP_STATS_COMPARE_FILES_DIALOG):
+        url = user_guide_url("ChStatCompareCaptureFiles.html");
+        break;
+    case(HELP_STATS_LTE_MAC_TRAFFIC_DIALOG):
+        url = user_guide_url("ChTelLTEMACTraffic.html");
+        break;
+    case(HELP_STATS_LTE_RLC_TRAFFIC_DIALOG):
+        url = user_guide_url("ChTelLTERLCTraffic.html");
+        break;
+    case(HELP_STATS_WLAN_TRAFFIC_DIALOG):
+        url = user_guide_url("ChStatWLANTraffic.html");
+        break;
+    case(HELP_FILESET_DIALOG):
+        url = user_guide_url("ChIOFileSetSection.html");
+        break;
+    case(HELP_CAPTURE_INTERFACE_OPTIONS_DIALOG):
+        url = user_guide_url("ChCustPreferencesSection.html#ChCustInterfaceOptionsSection");
+        break;
+    case(HELP_CAPTURE_INTERFACES_DETAILS_DIALOG):
+        url = user_guide_url("ChCapInterfaceDetailsSection.html");
+        break;
+    case(HELP_PREFERENCES_DIALOG):
+        url = user_guide_url("ChCustPreferencesSection.html");
+        break;
+    case(HELP_EXPORT_FILE_DIALOG):
+    case(HELP_EXPORT_FILE_WIN32_DIALOG):
+        url = user_guide_url("ChIOExportSection.html");
+        break;
+    case(HELP_EXPORT_BYTES_DIALOG):
+    case(HELP_EXPORT_BYTES_WIN32_DIALOG):
+        url = user_guide_url("ChIOExportSection.html#ChIOExportSelectedDialog");
+        break;
+    case(HELP_EXPORT_OBJECT_LIST):
+        url = user_guide_url("ChIOExportSection.html#ChIOExportObjectsDialog");
+        break;
+    case(HELP_OPEN_DIALOG):
+    case(HELP_OPEN_WIN32_DIALOG):
+        url = user_guide_url("ChIOOpenSection.html");
+        break;
+    case(HELP_MERGE_DIALOG):
+    case(HELP_MERGE_WIN32_DIALOG):
+        url = user_guide_url("ChIOMergeSection.html");
+        break;
+    case(HELP_IMPORT_DIALOG):
+        url = user_guide_url("ChIOImportSection.html");
+        break;
+    case(HELP_SAVE_DIALOG):
+    case(HELP_SAVE_WIN32_DIALOG):
+        url = user_guide_url("ChIOSaveSection.html");
+        break;
+    case(HELP_TIME_SHIFT_DIALOG):
+        url = user_guide_url("ChWorkShiftTimePacketSection.html");
+        break;
+    case(HELP_FILTER_SAVE_DIALOG):
+        url = user_guide_url("ChWorkFilterSaveSection.html");
+        break;
+
+    default:
+        g_assert_not_reached();
+    }
+
+    return url;
+}
+
+/*
+ * Editor modelines
+ *
+ * Local Variables:
+ * c-basic-offset: 4
+ * tab-width: 8
+ * indent-tabs-mode: nil
+ * End:
+ *
+ * ex: set shiftwidth=4 tabstop=8 expandtab:
+ * :indentSize=4:tabSize=8:noTabs=true:
+ */
diff --git a/ui/help_url.h b/ui/help_url.h
new file mode 100644
index 0000000000..40f1fa94ee
--- /dev/null
+++ b/ui/help_url.h
@@ -0,0 +1,153 @@
+/* help_dlg.h
+ *
+ * $Id$
+ *
+ * Some content from gtk/help_dlg.h by Laurent Deniel <laurent.deniel@free.fr>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 2000 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.
+ *
+ */
+
+#ifndef __HELP_URL_H__
+#define __HELP_URL_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/** @file
+ * "Help" URLs.
+ */
+
+typedef enum {
+    /* pages online at www.wireshark.org */
+    ONLINEPAGE_HOME,
+    ONLINEPAGE_WIKI,
+    ONLINEPAGE_USERGUIDE,
+    ONLINEPAGE_FAQ,
+    ONLINEPAGE_DOWNLOAD,
+    ONLINEPAGE_SAMPLE_FILES,
+    ONLINEPAGE_CAPTURE_SETUP,
+    ONLINEPAGE_NETWORK_MEDIA,
+    ONLINEPAGE_SAMPLE_CAPTURES,
+    ONLINEPAGE_SECURITY,
+    ONLINEPAGE_CHIMNEY,
+    ONLINEPAGE_ASK,
+
+    /* local manual pages */
+    LOCALPAGE_MAN_WIRESHARK = 100,
+    LOCALPAGE_MAN_WIRESHARK_FILTER,
+    LOCALPAGE_MAN_TSHARK,
+    LOCALPAGE_MAN_RAWSHARK,
+    LOCALPAGE_MAN_DUMPCAP,
+    LOCALPAGE_MAN_MERGECAP,
+    LOCALPAGE_MAN_EDITCAP,
+    LOCALPAGE_MAN_TEXT2PCAP,
+
+    /* help pages (textfiles or local HTML User's Guide) */
+    HELP_CONTENT = 200,
+    HELP_GETTING_STARTED,           /* currently unused */
+    HELP_CAPTURE_OPTIONS_DIALOG,
+    HELP_CAPTURE_FILTERS_DIALOG,
+    HELP_DISPLAY_FILTERS_DIALOG,
+    HELP_COLORING_RULES_DIALOG,
+    HELP_CONFIG_PROFILES_DIALOG,
+    HELP_MANUAL_ADDR_RESOLVE_DIALOG,
+    HELP_PRINT_DIALOG,
+    HELP_FIND_DIALOG,
+    HELP_FILESET_DIALOG,
+    HELP_FIREWALL_DIALOG,
+    HELP_GOTO_DIALOG,
+    HELP_CAPTURE_INTERFACES_DIALOG,
+    HELP_ENABLED_PROTOCOLS_DIALOG,
+    HELP_DECODE_AS_DIALOG,
+    HELP_DECODE_AS_SHOW_DIALOG,
+    HELP_FOLLOW_STREAM_DIALOG,
+    HELP_EXPERT_INFO_DIALOG,
+    HELP_STATS_SUMMARY_DIALOG,
+    HELP_STATS_PROTO_HIERARCHY_DIALOG,
+    HELP_STATS_ENDPOINTS_DIALOG,
+    HELP_STATS_CONVERSATIONS_DIALOG,
+    HELP_STATS_IO_GRAPH_DIALOG,
+    HELP_STATS_COMPARE_FILES_DIALOG,
+    HELP_STATS_LTE_MAC_TRAFFIC_DIALOG,
+    HELP_STATS_LTE_RLC_TRAFFIC_DIALOG,
+    HELP_STATS_WLAN_TRAFFIC_DIALOG,
+    HELP_CAPTURE_INTERFACE_OPTIONS_DIALOG,
+    HELP_CAPTURE_INTERFACES_DETAILS_DIALOG,
+    HELP_PREFERENCES_DIALOG,
+    HELP_CAPTURE_INFO_DIALOG,
+    HELP_EXPORT_FILE_DIALOG,
+    HELP_EXPORT_BYTES_DIALOG,
+    HELP_EXPORT_OBJECT_LIST,
+    HELP_OPEN_DIALOG,
+    HELP_MERGE_DIALOG,
+    HELP_IMPORT_DIALOG,
+    HELP_SAVE_DIALOG,
+    HELP_EXPORT_FILE_WIN32_DIALOG,
+    HELP_EXPORT_BYTES_WIN32_DIALOG,
+    HELP_OPEN_WIN32_DIALOG,
+    HELP_MERGE_WIN32_DIALOG,
+    HELP_SAVE_WIN32_DIALOG,
+    HELP_TIME_SHIFT_DIALOG,
+    HELP_FILTER_SAVE_DIALOG
+} topic_action_e;
+
+/** Given a filename return a filesystem URL. Relative paths are prefixed with
+ * the datafile directory path.
+ *
+ * @param filename A file name or path. Relative paths will be prefixed with
+ * the data file directory path.
+ * @return A filesystem URL for the file or NULL on failure. A non-NULL return
+ * value must be freed with g_free().
+ */
+gchar *data_file_url(const gchar *filename);
+
+/** Given a topic action return its online (www.wireshark.org) URL or NULL.
+ *
+ * @param action Topic action, e.g. ONLINEPAGE_HOME or ONLINEPAGE_ASK.
+ * @return A static URL or NULL. MUST NOT be freed.
+ */
+const char *topic_online_url(topic_action_e action);
+
+/** Given a page in the Wireshark User's Guide return its URL. On Windows
+ *  an attempt will be made to open User Guide URLs with HTML Help. If
+ *  the attempt succeeds NULL will be returned.
+ *
+ * @param page A page in the User's Guide.
+ * @return A static URL or NULL. A non-NULL return value must be freed
+ * with g_free().
+ */
+gchar *user_guide_url(const gchar *page);
+
+/** Given a topic action return its URL. On Windows an attempt will be
+ *  made to open User Guide URLs with HTML Help. If the attempt succeeds
+ *  NULL will be returned.
+ *
+ * @param action Topic action.
+ * @return A static URL or NULL. A non-NULL return value must be freed
+ * with g_free().
+ */
+gchar *topic_action_url(topic_action_e action);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __HELP_URL_H__ */