apps/plugins/shortcuts/shortcuts_view.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2007 Bryan Childs
  11  * Copyright (c) 2007 Alexander Levin
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version 2
  16  * of the License, or (at your option) any later version.
  17  *
  18  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  19  * KIND, either express or implied.
  20  *
  21  ****************************************************************************/
  22
  23 #include "shortcuts.h"
  24
  25 PLUGIN_HEADER
  26
  27 enum sc_list_action_type
  28 {
  29     SCLA_NONE,
  30     SCLA_SELECT,
  31     SCLA_DELETE,
  32     SCLA_USB,
  33 };
  34
  35
  36 static char *link_filename;
  37 static bool user_file;
  38 static int gselected_item;
  39 static bool usb_connected = false;
  40
  41 enum sc_list_action_type draw_sc_list(struct gui_synclist gui_sc);
  42
  43 /* Will be passed sc_file* as data */
  44 char* build_sc_list(int selected_item, void *data,
  45                     char *buffer, size_t buffer_len);
  46
  47 /* Returns true iff we should leave the main loop */
  48 bool list_sc(bool is_editable);
  49
  50 bool goto_entry(char *file_or_dir);
  51 bool ends_with(char *str, char *suffix);
  52
  53
  54 enum sc_list_action_type draw_sc_list(struct gui_synclist gui_sc)
  55 {
  56     int button;
  57
  58     rb->gui_synclist_draw(&gui_sc);
  59
  60     while (true) {
  61         /* user input */
  62         button = rb->get_action(CONTEXT_LIST, TIMEOUT_BLOCK);
  63         if (rb->gui_synclist_do_button(&gui_sc, &button,
  64                                             LIST_WRAP_UNLESS_HELD)) {
  65             /* automatic handling of user input.
  66             * _UNLESS_HELD can be _ON or _OFF also
  67             * selection changed, so redraw */
  68             continue;
  69         }
  70         switch (button) { /* process the user input */
  71             case ACTION_STD_OK:
  72                 gselected_item = rb->gui_synclist_get_sel_pos(&gui_sc);
  73                 return SCLA_SELECT;
  74             case ACTION_STD_MENU:
  75                 /* Only allow delete entries in the default file
  76                  * since entries can be appended (with a plugin)
  77                  * to the default file only. The behaviour is thus
  78                  * symmetric in this respect. */
  79                 if (!user_file) {
  80                     gselected_item = rb->gui_synclist_get_sel_pos(&gui_sc);
  81                     return SCLA_DELETE;
  82                 }
  83                 break;
  84             case ACTION_STD_CANCEL:
  85                 return SCLA_NONE;
  86             default:
  87                 if (rb->default_event_handler(button) == SYS_USB_CONNECTED) {
  88                     return SCLA_USB;
  89                 }
  90         }
  91     }
  92 }
  93
  94
  95 char* build_sc_list(int selected_item, void *data,
  96                     char *buffer, size_t buffer_len)
  97 {
  98     sc_file_t *file = (sc_file_t*)data;
  99
 100     if (!is_valid_index(file, selected_item)) {
 101         return NULL;
 102     }
 103     sc_entry_t *entry = file->entries + selected_item;
 104     rb->snprintf(buffer, buffer_len, "%s", entry->disp);
 105     return buffer;
 106 }
 107
 108
 109 bool list_sc(bool is_editable)
 110 {
 111     int selected_item = 0;
 112     char selected_dir[MAX_PATH];
 113     enum sc_list_action_type action = SCLA_NONE;
 114     struct gui_synclist gui_sc;
 115
 116     rb->memset(selected_dir, 0, sizeof(selected_dir));
 117
 118     /* Setup the GUI list object, draw it to the screen,
 119      * and then handle the user input to it */
 120     rb->gui_synclist_init(&gui_sc, &build_sc_list, &sc_file, false, 1, NULL);
 121     rb->gui_synclist_set_title(&gui_sc,
 122         (is_editable?"Shortcuts (editable)":"Shortcuts (sealed)"), NOICON);
 123     rb->gui_synclist_set_nb_items(&gui_sc, sc_file.entry_cnt);
 124     rb->gui_synclist_limit_scroll(&gui_sc, false);
 125     rb->gui_synclist_select_item(&gui_sc, 0);
 126
 127     /* Draw the prepared widget to the LCD now */
 128     action = draw_sc_list(gui_sc);
 129     if (action == SCLA_USB) {
 130         usb_connected = true;
 131         return true;
 132     }
 133
 134     /* which item do we action? */
 135     selected_item = gselected_item;
 136
 137     if (!is_valid_index(&sc_file, selected_item)) {
 138         /* This should never happen */
 139         rb->splash(HZ*2, "Bad entry selected!");
 140         return true;
 141     }
 142
 143     /* perform the following actions if the user "selected"
 144      * the item in the list (i.e. they want to go there
 145      * in the filebrowser tree */
 146     switch(action) {
 147         case SCLA_SELECT:
 148             return goto_entry(sc_file.entries[selected_item].path);
 149         case SCLA_DELETE:
 150             rb->splashf(HZ, "Deleting %s", sc_file.entries[selected_item].disp);
 151             remove_entry(&sc_file, selected_item);
 152             dump_sc_file(&sc_file, link_filename);
 153             return (sc_file.entry_cnt == 0);
 154         default:
 155             return true;
 156     }
 157 }
 158
 159
 160 bool goto_entry(char *file_or_dir)
 161 {
 162     DEBUGF("Trying to go to '%s'...\n", file_or_dir);
 163
 164     bool is_dir = ends_with(file_or_dir, PATH_SEPARATOR);
 165     bool exists;
 166     char *what;
 167     if (is_dir) {
 168         what = "Directory";
 169         exists = rb->dir_exists(file_or_dir);
 170     } else {
 171         what = "File";
 172         exists = rb->file_exists(file_or_dir);
 173     }
 174
 175     if (!exists) {
 176         rb->splashf(HZ*2, "%s %s no longer exists on disk", what, file_or_dir);
 177         return false;
 178     }
 179     /* Set the browsers dirfilter to the global setting
 180      * This is required in case the plugin was launched
 181      * from the plugins browser, in which case the
 182      * dirfilter is set to only display .rock files */
 183     rb->set_dirfilter(rb->global_settings->dirfilter);
 184
 185     /* Change directory to the entry selected by the user */
 186     rb->set_current_file(file_or_dir);
 187     return true;
 188 }
 189
 190
 191 bool ends_with(char *string, char *suffix)
 192 {
 193     unsigned int str_len = rb->strlen(string);
 194     unsigned int sfx_len = rb->strlen(suffix);
 195     if (str_len < sfx_len)
 196         return false;
 197     return (rb->strncmp(string + str_len - sfx_len, suffix, sfx_len) == 0);
 198 }
 199
 200
 201 enum plugin_status plugin_start(UNUSED_ATTR const void* parameter)
 202 {
 203     bool leave_loop;
 204
 205     /* This is a viewer, so a parameter must have been specified */
 206     if (parameter == NULL) {
 207         rb->splash(HZ*2, "No parameter specified!");
 208         return PLUGIN_ERROR;
 209     }
 210     link_filename = (char*)parameter;
 211     user_file = (rb->strcmp(link_filename, SHORTCUTS_FILENAME) != 0);
 212
 213     allocate_memory(&memory_buf, &memory_bufsize);
 214
 215     if (!load_sc_file(&sc_file, link_filename, true,
 216             memory_buf, memory_bufsize)) {
 217         DEBUGF("Could not load %s\n", link_filename);
 218         return PLUGIN_ERROR;
 219     }
 220     if (sc_file.entry_cnt==0) {
 221         rb->splash(HZ*2, "No shortcuts in the file!");
 222         return PLUGIN_OK;
 223     } else if ((sc_file.entry_cnt==1) && user_file) {
 224         /* if there's only one entry in the user .link file,
 225          * go straight to it without displaying the menu
 226          * thus allowing 'quick links' */
 227         goto_entry(sc_file.entries[0].path);
 228         return PLUGIN_OK;
 229     }
 230
 231     do {
 232         /* Display a menu to choose between the entries */
 233         leave_loop = list_sc(!user_file);
 234     } while (!leave_loop);
 235
 236     return usb_connected ? PLUGIN_USB_CONNECTED : PLUGIN_OK;
 237 }