297 lines
8.2 KiB
C
297 lines
8.2 KiB
C
/*
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* This file is part of NetSurf, http://netsurf.sourceforge.net/
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* Licensed under the GNU General Public License,
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* http://www.opensource.org/licenses/gpl-license
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* Copyright 2004 Richard Wilson <not_ginger_matt@users.sourceforge.net>
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*/
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/** \file
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* Interactive help (implementation).
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include "oslib/help.h"
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#include "oslib/os.h"
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#include "oslib/taskmanager.h"
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#include "oslib/wimp.h"
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#include "netsurf/riscos/gui.h"
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#include "netsurf/riscos/help.h"
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#include "netsurf/riscos/toolbar.h"
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#include "netsurf/riscos/wimp.h"
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#include "netsurf/utils/messages.h"
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#include "netsurf/utils/log.h"
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/* Recognised help keys
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====================
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HelpIconbar Iconbar (no icon suffix is used)
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HelpAppInfo Application info window
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HelpBrowser Browser window [*]
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HelpHistory History window [*]
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HelpObjInfo Object info window
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HelpPageInfo Page info window
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HelpSaveAs Save as window
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HelpScaleView Scale view window
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HelpStatus Status window
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HelpToolbar Toolbar window
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HelpHotlist Hotlist window [*]
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HelpHotToolbar Hotlist window toolbar
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HelpHotEntry Hotlist entry window
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HelpHotFolder Hotlist entry window
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HelpIconMenu Iconbar menu
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HelpBrowserMenu Browser window menu
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HelpHotlistMenu Hotlist window menu
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The prefixes are followed by either the icon number (eg 'HelpToolbar7'), or a series
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of numbers representing the menu structure (eg 'HelpBrowserMenu3-1-2').
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If '<key><identifier>' is not available, then simply '<key>' is then used. For example
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if 'HelpToolbar7' is not available then 'HelpToolbar' is then tried.
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If an item is greyed out then a suffix of 'g' is added (eg 'HelpToolbar7g'). For this to
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work, windows must have bit 4 of the window flag byte set and the user must be running
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RISC OS 5.03 or greater.
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For items marked with an asterisk [*] a call must be made to determine the required
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help text as the window does not contain any icons. An example of this is the hotlist
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window where ro_gui_hotlist_help() is called.
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*/
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static void ro_gui_interactive_help_broadcast(wimp_message *message, char *token);
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static os_t help_time = 0;
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/**
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* Attempts to process an interactive help message request
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*
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* \param message the request message
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*/
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void ro_gui_interactive_help_request(wimp_message *message) {
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char message_token[32];
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char menu_buffer[4];
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wimp_selection menu_tree;
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help_full_message_request *message_data;
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wimp_w window;
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wimp_i icon;
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struct gui_window *g;
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unsigned int index;
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bool greyed = false;
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wimp_menu *test_menu;
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/* Ensure we have a help request
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*/
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if ((!message) || (message->action != message_HELP_REQUEST)) return;
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/* Remember the time of the request
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*/
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xos_read_monotonic_time(&help_time);
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/* Initialise the basic token to a null byte
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*/
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message_token[0] = 0x00;
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/* Get the message data
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*/
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message_data = (help_full_message_request *)message;
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window = message_data->w;
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icon = message_data->i;
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/* Do the basic window checks
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*/
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if (window == (wimp_w)-2) {
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sprintf(message_token, "HelpIconbar");
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} else if (window == dialog_info) {
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sprintf(message_token, "HelpAppInfo%i", (int)icon);
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} else if (window == history_window) {
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sprintf(message_token, "HelpHistory%i", (int)icon);
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} else if (window == dialog_objinfo) {
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sprintf(message_token, "HelpObjInfo%i", (int)icon);
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} else if (window == dialog_pageinfo) {
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sprintf(message_token, "HelpPageInfo%i", (int)icon);
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} else if (window == dialog_saveas) {
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sprintf(message_token, "HelpSaveAs%i", (int)icon);
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} else if (window == dialog_zoom) {
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sprintf(message_token, "HelpScaleView%i", (int)icon);
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} else if (window == dialog_folder) {
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sprintf(message_token, "HelpHotFolder%i", (int)icon);
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} else if (window == dialog_entry) {
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sprintf(message_token, "HelpHotEntry%i", (int)icon);
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} else if (window == hotlist_window) {
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sprintf(message_token, "HelpHotlist%i",
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ro_gui_hotlist_help(message_data->pos.x,
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message_data->pos.y));
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} else if (hotlist_toolbar &&
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window == hotlist_toolbar->toolbar_handle) {
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sprintf(message_token, "HelpHotToolbar%i", (int)icon);
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} else if ((g = ro_gui_window_lookup(window))) {
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sprintf(message_token, "HelpBrowser%i", (int)icon);
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} else if ((g = ro_gui_toolbar_lookup(window))) {
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sprintf(message_token, "HelpToolbar%i", (int)icon);
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} else if ((g = ro_gui_status_lookup(window))) {
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sprintf(message_token, "HelpStatus%i", (int)icon);
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}
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/* If we've managed to find something so far then we broadcast it
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*/
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if (message_token[0] != 0x00) {
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/* Check to see if we are greyed out
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*/
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if ((icon >= 0) && (ro_gui_get_icon_shaded_state(window, icon))) {
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strcat(message_token, "g");
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}
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/* Broadcast out message
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*/
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ro_gui_interactive_help_broadcast(message, &message_token[0]);
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return;
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}
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/* If we are not on an icon, we can't be in a menu (which stops separators
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giving help for their parent) so we abort. You don't even want to think
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about the awful hack I was considering before I realised this...
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*/
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if (icon == (wimp_i)-1) return;
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/* As a last resort, check for menu help.
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*/
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if (xwimp_get_menu_state((wimp_menu_state_flags)1,
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&menu_tree,
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window, icon)) return;
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if (menu_tree.items[0] == -1) return;
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/* Set the prefix
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*/
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if (current_menu == iconbar_menu) {
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sprintf(message_token, "HelpIconMenu");
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} else if (current_menu == browser_menu) {
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sprintf(message_token, "HelpBrowserMenu");
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} else if (current_menu == hotlist_menu) {
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sprintf(message_token, "HelpHotlistMenu");
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} else {
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return;
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}
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/* Decode the menu
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*/
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index = 0;
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test_menu = current_menu;
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while (menu_tree.items[index] != -1) {
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/* Check if we're greyed out
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*/
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greyed |= test_menu->entries[menu_tree.items[index]].icon_flags & wimp_ICON_SHADED;
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test_menu = test_menu->entries[menu_tree.items[index]].sub_menu;
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/* Continue adding the entries
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*/
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if (index == 0) {
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sprintf(menu_buffer, "%i", menu_tree.items[index]);
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} else {
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sprintf(menu_buffer, "-%i", menu_tree.items[index]);
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}
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strcat(message_token, menu_buffer);
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index++;
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}
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if (greyed) strcat(message_token, "g");
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/* Finally, broadcast the menu help
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*/
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ro_gui_interactive_help_broadcast(message, &message_token[0]);
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}
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/**
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* Broadcasts a help reply
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*
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* \param message the original request message
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* \param token the token to look up
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*/
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static void ro_gui_interactive_help_broadcast(wimp_message *message, char *token) {
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const char *translated_token;
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help_full_message_reply *reply;
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char *base_token;
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/* Start off with an empty reply
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*/
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reply = (help_full_message_reply *)message;
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reply->reply[0] = '\0';
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/* Check if the message exists
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*/
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translated_token = messages_get(token);
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if (translated_token == token) {
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/* We must never provide default help for a 'g' suffix.
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*/
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if (token[strlen(token) - 1] != 'g') {
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/* Find the key from the token.
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*/
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base_token = token;
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while (base_token[0] != 0x00) {
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if ((base_token[0] == '-') ||
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((base_token[0] >= '0') && (base_token[0] <= '9'))) {
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base_token[0] = 0x00;
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} else {
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++base_token;
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}
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}
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/* Check if the base key exists and use an empty string if not
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*/
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translated_token = messages_get(token);
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}
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}
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/* Copy our message string
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*/
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if (translated_token != token) {
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reply->reply[235] = 0;
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strncpy(reply->reply, translated_token, 235);
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}
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/* Broadcast the help reply
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*/
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reply->size = 256;
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reply->action = message_HELP_REPLY;
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reply->your_ref = reply->my_ref;
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wimp_send_message(wimp_USER_MESSAGE, (wimp_message *)reply, reply->sender);
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}
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/**
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* Checks if interactive help is running
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*
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* \return non-zero if interactive help is available, or 0 if not available
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*/
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int ro_gui_interactive_help_available() {
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taskmanager_task task;
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int context = 0;
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char *end;
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os_t time;
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/* Check if we've received a help request in the last 0.5s to test for generic
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interactive help applications
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*/
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xos_read_monotonic_time(&time);
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if ((help_time + 50) > time) return true;
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/* Attempt to find the task 'Help'
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*/
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do {
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if (xtaskmanager_enumerate_tasks(context, &task, sizeof(taskmanager_task),
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&context, &end)) return 0;
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/* We can't just use strcmp due to string termination issues.
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*/
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if (strncmp(task.name, "Help", 4) == 0) {
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if (task.name[4] < 32) return true;
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}
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} while (context >= 0);
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/* Return failure
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*/
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return 0;
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}
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