/* * StarDict terminal UI * * Copyright (c) 2013 - 2016, Přemysl Janouch * All rights reserved. * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include // input #include // output #include "config.h" #include "stardict.h" #include "utils.h" #ifdef WITH_GTK #include #endif // WITH_GTK #define CTRL_KEY(x) ((x) - 'A' + 1) #define TOP_BAR_CUTOFF 2 ///< How many lines are reserved on top #define APP_TITLE PROJECT_NAME " " ///< Left top corner // --- Utilities --------------------------------------------------------------- static size_t unichar_width (gunichar ch) { if (g_unichar_iszerowidth (ch)) return 0; return 1 + g_unichar_iswide (ch); } // At times, GLib even with its sheer size is surprisingly useless, // and I need to port some code over from "liberty". static gchar ** get_xdg_config_dirs (void) { GPtrArray *paths = g_ptr_array_new (); g_ptr_array_add (paths, (gpointer) g_get_user_config_dir ()); for (const gchar *const *system = g_get_system_config_dirs (); *system; system++) g_ptr_array_add (paths, (gpointer) *system); g_ptr_array_add (paths, NULL); return (gchar **) g_ptr_array_free (paths, FALSE); } static gchar * resolve_relative_filename_generic (gchar **paths, const gchar *tail, const gchar *filename) { for (; *paths; paths++) { // As per XDG spec, relative paths are ignored if (**paths != '/') continue; gchar *file = g_build_filename (*paths, tail, filename, NULL); GStatBuf st; if (!g_stat (file, &st)) return file; g_free (file); } return NULL; } static gchar * resolve_relative_config_filename (const gchar *filename) { gchar **paths = get_xdg_config_dirs (); gchar *result = resolve_relative_filename_generic (paths, PROJECT_NAME, filename); g_strfreev (paths); return result; } static gchar * try_expand_tilde (const gchar *filename) { size_t until_slash = strcspn (filename, "/"); if (!until_slash) return g_build_filename (g_get_home_dir () ?: "", filename, NULL); long buf_len = sysconf (_SC_GETPW_R_SIZE_MAX); if (buf_len < 0) buf_len = 1024; struct passwd pwd, *success = NULL; gchar *user = g_strndup (filename, until_slash); gchar *buf = g_malloc (buf_len); while (getpwnam_r (user, &pwd, buf, buf_len, &success) == ERANGE) buf = g_realloc (buf, buf_len <<= 1); g_free (user); gchar *result = NULL; if (success) result = g_strdup_printf ("%s%s", pwd.pw_dir, filename + until_slash); g_free (buf); return result; } static gchar * resolve_filename (const gchar *filename, gchar *(*relative_cb) (const char *)) { // Absolute path is absolute if (*filename == '/') return g_strdup (filename); // We don't want to use wordexp() for this as it may execute /bin/sh if (*filename == '~') { // Paths to home directories ought to be absolute char *expanded = try_expand_tilde (filename + 1); if (expanded) return expanded; g_debug ("failed to expand the home directory in `%s'", filename); } return relative_cb (filename); } // --- Application ------------------------------------------------------------- #define ATTRIBUTE_TABLE(XX) \ XX( HEADER, "header", -1, -1, A_REVERSE ) \ XX( ACTIVE, "header-active", -1, -1, A_UNDERLINE ) \ XX( SEARCH, "search", -1, -1, A_UNDERLINE ) \ XX( EVEN, "even", -1, -1, 0 ) \ XX( ODD, "odd", -1, -1, 0 ) enum { #define XX(name, config, fg_, bg_, attrs_) ATTRIBUTE_ ## name, ATTRIBUTE_TABLE (XX) #undef XX ATTRIBUTE_COUNT }; struct attrs { short fg; ///< Foreground color index short bg; ///< Background color index chtype attrs; ///< Other attributes }; // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - /// Data relating to one entry within the dictionary. typedef struct view_entry ViewEntry; /// Data relating to a dictionary file. typedef struct dictionary Dictionary; /// Encloses application data. typedef struct application Application; /// Application options. typedef struct app_options AppOptions; struct view_entry { gchar * word; ///< Word gchar ** definitions; ///< Word definition entries gsize definitions_length; ///< Length of the @a definitions array }; struct dictionary { gchar * name; ///< Visible identifier gsize name_width; ///< Visible width of the name gchar * filename; ///< Path to the dictionary StardictDict * dict; ///< Dictionary }; struct application { GMainLoop * loop; ///< Main loop termo_t * tk; ///< termo handle guint tk_timer; ///< termo timeout timer GIConv ucs4_to_locale; ///< UTF-32 -> locale conversion gboolean locale_is_utf8; ///< The locale is Unicode GArray * dictionaries; ///< All loaded dictionaries StardictDict * dict; ///< The current dictionary guint show_help : 1; ///< Whether help can be shown guint center_search : 1; ///< Whether to center the search guint underline_last : 1; ///< Underline the last definition guint hl_prefix : 1; ///< Highlight the common prefix guint32 top_position; ///< Index of the topmost dict. entry guint top_offset; ///< Offset into the top entry guint selected; ///< Offset to the selected definition GPtrArray * entries; ///< ViewEntry's within the view gchar * search_label; ///< Text of the "Search" label GArray * input; ///< The current search input guint input_pos; ///< Cursor position within input gboolean input_confirmed; ///< Input has been confirmed gfloat division; ///< Position of the division column guint selection_timer; ///< Selection watcher timeout timer gint selection_interval; ///< Selection watcher timer interval gchar * selection_contents; ///< Selection contents struct attrs attrs[ATTRIBUTE_COUNT]; }; /// Shortcut to retrieve named terminal attributes #define APP_ATTR(name) self->attrs[ATTRIBUTE_ ## name].attrs struct app_options { gboolean show_version; ///< Output version information and quit gint selection_watcher; ///< Interval in milliseconds, or -1 }; // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - /// Splits the entry and adds it to a pointer array. static void view_entry_split_add (GPtrArray *out, const gchar *text) { gchar **it, **tmp = g_strsplit (text, "\n", -1); for (it = tmp; *it; it++) if (**it) g_ptr_array_add (out, g_strdup (*it)); g_strfreev (tmp); } /// Decomposes a dictionary entry into the format we want. static ViewEntry * view_entry_new (StardictIterator *iterator) { g_return_val_if_fail (stardict_iterator_is_valid (iterator), NULL); ViewEntry *ve = g_slice_alloc (sizeof *ve); GString *word = g_string_new (stardict_iterator_get_word (iterator)); StardictEntry *entry = stardict_iterator_get_entry (iterator); g_return_val_if_fail (entry != NULL, NULL); GPtrArray *definitions = g_ptr_array_new (); const GList *fields = stardict_entry_get_fields (entry); gboolean found_anything_displayable = FALSE; while (fields) { const StardictEntryField *field = fields->data; switch (field->type) { case STARDICT_FIELD_MEANING: view_entry_split_add (definitions, field->data); found_anything_displayable = TRUE; break; case STARDICT_FIELD_PANGO: { char *text; if (!pango_parse_markup (field->data, -1, 0, NULL, &text, NULL, NULL)) text = g_strdup_printf ("<%s>", _("error in entry")); view_entry_split_add (definitions, text); found_anything_displayable = TRUE; g_free (text); break; } case STARDICT_FIELD_PHONETIC: g_string_append_printf (word, " /%s/", (const gchar *) field->data); break; default: // TODO support more of them break; } fields = fields->next; } g_object_unref (entry); if (!found_anything_displayable) g_ptr_array_add (definitions, g_strdup_printf ("<%s>", _("no usable field found"))); ve->word = g_string_free (word, FALSE); ve->definitions_length = definitions->len; g_ptr_array_add (definitions, NULL); ve->definitions = (gchar **) g_ptr_array_free (definitions, FALSE); return ve; } /// Release resources associated with the view entry. static void view_entry_free (ViewEntry *ve) { g_free (ve->word); g_strfreev (ve->definitions); g_slice_free1 (sizeof *ve, ve); } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static gboolean dictionary_load (Dictionary *self, GError **e) { if (!(self->dict = stardict_dict_new (self->filename, e))) return FALSE; if (!self->name) { self->name = g_strdup (stardict_info_get_book_name (stardict_dict_get_info (self->dict))); } // Add some padding for decorative purposes gchar *tmp = g_strdup_printf (" %s ", self->name); g_free (self->name); self->name = tmp; gunichar *ucs4 = g_utf8_to_ucs4_fast (self->name, -1, NULL); for (gunichar *it = ucs4; *it; it++) self->name_width += unichar_width (*it); g_free (ucs4); return TRUE; } static void dictionary_free (Dictionary *self) { g_free (self->name); g_free (self->filename); if (self->dict) g_object_unref (self->dict); } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - /// Reload view items. static void app_reload_view (Application *self) { if (self->entries->len != 0) g_ptr_array_remove_range (self->entries, 0, self->entries->len); gint remains = LINES - TOP_BAR_CUTOFF + self->top_offset; StardictIterator *iterator = stardict_iterator_new (self->dict, self->top_position); while (remains > 0 && stardict_iterator_is_valid (iterator)) { ViewEntry *entry = view_entry_new (iterator); remains -= entry->definitions_length; g_ptr_array_add (self->entries, entry); stardict_iterator_next (iterator); } g_object_unref (iterator); } #ifdef WITH_GTK static gboolean on_selection_timer (gpointer data); static void rearm_selection_watcher (Application *self) { if (self->selection_interval > 0) self->selection_timer = g_timeout_add (self->selection_interval, on_selection_timer, self); } #endif // WITH_GTK /// Load configuration for a color using a subset of git config colors. static void app_load_color (Application *self, GKeyFile *kf, const gchar *name, int id) { gchar *value = g_key_file_get_string (kf, "Colors", name, NULL); if (!value) return; struct attrs attrs = { -1, -1, 0 }; gchar **values = g_strsplit (value, " ", 0); gint colors = 0; for (gchar **it = values; *it; it++) { gchar *end = NULL; gint64 n = g_ascii_strtoll (*it, &end, 10); if (*it != end && !*end && n >= G_MINSHORT && n <= G_MAXSHORT) { if (colors == 0) attrs.fg = n; if (colors == 1) attrs.bg = n; colors++; } else if (!strcmp (*it, "bold")) attrs.attrs |= A_BOLD; else if (!strcmp (*it, "dim")) attrs.attrs |= A_DIM; else if (!strcmp (*it, "ul")) attrs.attrs |= A_UNDERLINE; else if (!strcmp (*it, "blink")) attrs.attrs |= A_BLINK; else if (!strcmp (*it, "reverse")) attrs.attrs |= A_REVERSE; #ifdef A_ITALIC else if (!strcmp (*it, "italic")) attrs.attrs |= A_ITALIC; #endif // A_ITALIC } g_strfreev (values); g_free (value); self->attrs[id] = attrs; } static gboolean app_load_bool (GKeyFile *kf, const gchar *name, gboolean def) { GError *e = NULL; bool value = g_key_file_get_boolean (kf, "Settings", name, &e); if (e) { g_error_free (e); return def; } return value; } static void app_load_config_values (Application *self, GKeyFile *kf) { self->center_search = app_load_bool (kf, "center-search", self->center_search); self->underline_last = app_load_bool (kf, "underline-last", self->underline_last); self->hl_prefix = app_load_bool (kf, "hl-common-prefix", self->hl_prefix); #define XX(name, config, fg_, bg_, attrs_) \ app_load_color (self, kf, config, ATTRIBUTE_ ## name); ATTRIBUTE_TABLE (XX) #undef XX const gchar *dictionaries = "Dictionaries"; gchar **names = g_key_file_get_keys (kf, dictionaries, NULL, NULL); if (!names) return; for (gchar **it = names; *it; it++) { gchar *path = g_key_file_get_string (kf, dictionaries, *it, NULL); if (!path) continue; // Try to resolve relative paths and expand tildes gchar *resolved = resolve_filename (path, resolve_relative_config_filename); if (resolved) g_free (path); else resolved = path; Dictionary dict = { .name = g_strdup (*it), .filename = resolved }; g_array_append_val (self->dictionaries, dict); } g_strfreev (names); } static void app_load_config (Application *self, GError **e) { GKeyFile *kf = g_key_file_new (); gchar **paths = get_xdg_config_dirs (); // XXX: if there are dashes in the final path component, // the function tries to replace them with directory separators, // which is completely undocumented GError *error = NULL; g_key_file_load_from_dirs (kf, PROJECT_NAME G_DIR_SEPARATOR_S PROJECT_NAME ".conf", (const gchar **) paths, NULL, 0, &error); g_strfreev (paths); // TODO: proper error handling showing all relevant information; // we can afford that here since the terminal hasn't been initialized yet if (!error) app_load_config_values (self, kf); else if (error->code == G_KEY_FILE_ERROR_NOT_FOUND) g_error_free (error); else g_propagate_error (e, error); g_key_file_free (kf); } static void app_init_attrs (Application *self) { #define XX(name, config, fg_, bg_, attrs_) \ self->attrs[ATTRIBUTE_ ## name].fg = fg_; \ self->attrs[ATTRIBUTE_ ## name].bg = bg_; \ self->attrs[ATTRIBUTE_ ## name].attrs = attrs_; ATTRIBUTE_TABLE (XX) #undef XX } /// Initialize the application core. static void app_init (Application *self, AppOptions *options, char **filenames) { self->loop = NULL; self->selection_interval = options->selection_watcher; self->selection_timer = 0; self->selection_contents = NULL; #ifdef WITH_GTK if (gtk_init_check (0, NULL)) { // So that we set the input only when it actually changes GtkClipboard *clipboard = gtk_clipboard_get (GDK_SELECTION_PRIMARY); self->selection_contents = gtk_clipboard_wait_for_text (clipboard); rearm_selection_watcher (self); } else #endif // WITH_GTK self->loop = g_main_loop_new (NULL, FALSE); self->tk = NULL; self->tk_timer = 0; self->show_help = TRUE; self->center_search = TRUE; self->underline_last = TRUE; self->hl_prefix = TRUE; self->top_position = 0; self->top_offset = 0; self->selected = 0; self->entries = g_ptr_array_new_with_free_func ((GDestroyNotify) view_entry_free); self->search_label = g_strdup_printf ("%s: ", _("Search")); self->input = g_array_new (TRUE, FALSE, sizeof (gunichar)); self->input_pos = 0; self->input_confirmed = FALSE; self->division = 0.5; const char *charset; self->locale_is_utf8 = g_get_charset (&charset); #if G_BYTE_ORDER == G_LITTLE_ENDIAN self->ucs4_to_locale = g_iconv_open (charset, "UTF-32LE"); #else // G_BYTE_ORDER != G_LITTLE_ENDIAN self->ucs4_to_locale = g_iconv_open (charset, "UTF-32BE"); #endif // G_BYTE_ORDER != G_LITTLE_ENDIAN app_init_attrs (self); self->dictionaries = g_array_new (FALSE, TRUE, sizeof (Dictionary)); g_array_set_clear_func (self->dictionaries, (GDestroyNotify) dictionary_free); GError *error = NULL; app_load_config (self, &error); if (error) { g_printerr ("%s: %s\n", _("Cannot load configuration"), error->message); exit (EXIT_FAILURE); } // Dictionaries given on the command line override the configuration if (*filenames) { g_array_set_size (self->dictionaries, 0); while (*filenames) { Dictionary dict = { .filename = g_strdup (*filenames++) }; g_array_append_val (self->dictionaries, dict); } } for (guint i = 0; i < self->dictionaries->len && dictionary_load (&g_array_index (self->dictionaries, Dictionary, i), &error); i++) ; if (error) { g_printerr ("%s: %s\n", _("Error loading dictionary"), error->message); exit (EXIT_FAILURE); } if (!self->dictionaries->len) { g_printerr ("%s\n", _("No dictionaries found either in " "the configuration or on the command line")); exit (EXIT_FAILURE); } self->dict = g_array_index (self->dictionaries, Dictionary, 0).dict; app_reload_view (self); } static void app_init_terminal (Application *self) { TERMO_CHECK_VERSION; if (!(self->tk = termo_new (STDIN_FILENO, NULL, 0))) abort (); if (!initscr () || nonl () == ERR) abort (); // By default we don't use any colors so they're not required... if (start_color () == ERR || use_default_colors () == ERR || COLOR_PAIRS <= ATTRIBUTE_COUNT) return; gboolean failed = FALSE; for (int a = 0; a < ATTRIBUTE_COUNT; a++) { if (self->attrs[a].fg >= COLORS || self->attrs[a].fg < -1 || self->attrs[a].bg >= COLORS || self->attrs[a].bg < -1) { failed = TRUE; continue; } init_pair (a + 1, self->attrs[a].fg, self->attrs[a].bg); self->attrs[a].attrs |= COLOR_PAIR (a + 1); } // ...thus we can reset back to defaults even after initializing some if (failed) app_init_attrs (self); } /// Free any resources used by the application. static void app_destroy (Application *self) { if (self->loop) g_main_loop_unref (self->loop); if (self->tk) termo_destroy (self->tk); if (self->tk_timer) g_source_remove (self->tk_timer); if (self->selection_timer) g_source_remove (self->selection_timer); g_free (self->selection_contents); g_ptr_array_free (self->entries, TRUE); g_free (self->search_label); g_array_free (self->input, TRUE); g_array_free (self->dictionaries, TRUE); g_iconv_close (self->ucs4_to_locale); } /// Run the main event dispatch loop. static void app_run (Application *self) { if (self->loop) g_main_loop_run (self->loop); #ifdef WITH_GTK else gtk_main (); #endif // WITH_GTK } /// Quit the main event dispatch loop. static void app_quit (Application *self) { if (self->loop) g_main_loop_quit (self->loop); #ifdef WITH_GTK else gtk_main_quit (); #endif // WITH_GTK } /// Returns if the Unicode character is representable in the current locale. static gboolean app_is_character_in_locale (Application *self, gunichar ch) { // Avoid the overhead joined with calling iconv() for all characters if (self->locale_is_utf8) return TRUE; gchar *tmp = g_convert_with_iconv ((const gchar *) &ch, sizeof ch, self->ucs4_to_locale, NULL, NULL, NULL); if (!tmp) return FALSE; g_free (tmp); return TRUE; } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - // Necessary abstraction to simplify aligned, formatted character output typedef struct row_char RowChar; typedef struct row_buffer RowBuffer; struct row_char { gunichar c; ///< Unicode codepoint chtype attrs; ///< Special attributes int width; ///< How many cells this takes }; struct row_buffer { Application *app; ///< Reference to Application GArray *chars; ///< Characters int total_width; ///< Total width of all characters }; static void row_buffer_init (RowBuffer *self, Application *app) { self->app = app; self->chars = g_array_new (FALSE, TRUE, sizeof (RowChar)); self->total_width = 0; } #define row_buffer_free(self) g_array_unref ((self)->chars) /// Replace invalid chars and push all codepoints to the array w/ attributes. static void row_buffer_append (RowBuffer *self, const gchar *str, chtype attrs) { glong ucs4_len; gunichar *ucs4 = g_utf8_to_ucs4_fast (str, -1, &ucs4_len); for (glong i = 0; i < ucs4_len; i++) { // XXX: this is very crude as it disrespects combining marks gunichar c = app_is_character_in_locale (self->app, ucs4[i]) ? ucs4[i] : '?'; struct row_char rc = { ucs4[i], attrs, unichar_width (c) }; g_array_append_val (self->chars, rc); self->total_width += rc.width; } g_free (ucs4); } /// Pop as many codepoints as needed to free up "space" character cells. /// Given the suffix nature of combining marks, this should work pretty fine. static gint row_buffer_pop_cells (RowBuffer *self, gint space) { int made = 0; while (self->chars->len && made < space) { guint last = self->chars->len - 1; made += g_array_index (self->chars, RowChar, last).width; g_array_remove_index (self->chars, last); } self->total_width -= made; return made; } static void row_buffer_ellipsis (RowBuffer *self, int target, chtype attrs) { row_buffer_pop_cells (self, self->total_width - target); gunichar ellipsis = L'…'; if (app_is_character_in_locale (self->app, ellipsis)) { if (self->total_width >= target) row_buffer_pop_cells (self, 1); if (self->total_width + 1 <= target) row_buffer_append (self, "…", attrs); } else if (target >= 3) { if (self->total_width >= target) row_buffer_pop_cells (self, 3); if (self->total_width + 3 <= target) row_buffer_append (self, "...", attrs); } } static void row_buffer_print (RowBuffer *self, gunichar *ucs4, size_t len, chtype attrs) { gsize locale_str_len; guchar *str = (guchar *) g_convert_with_iconv ((const gchar *) ucs4, len * sizeof *ucs4, self->app->ucs4_to_locale, NULL, &locale_str_len, NULL); g_return_if_fail (str != NULL); for (gsize i = 0; i < locale_str_len; i++) addch (str[i] | attrs); g_free (str); } static void row_buffer_flush (RowBuffer *self) { if (!self->chars->len) return; gunichar ucs4[self->chars->len]; for (guint i = 0; i < self->chars->len; i++) ucs4[i] = g_array_index (self->chars, RowChar, i).c; guint mark = 0; for (guint i = 1; i < self->chars->len; i++) { chtype attrs = g_array_index (self->chars, RowChar, i - 1).attrs; if (attrs != g_array_index (self->chars, RowChar, i).attrs) { row_buffer_print (self, ucs4 + mark, i - mark, attrs); mark = i; } } row_buffer_print (self, ucs4 + mark, self->chars->len - mark, g_array_index (self->chars, RowChar, self->chars->len - 1).attrs); } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - /// Write the given UTF-8 string padded with spaces. /// @param[in] n The number of characters to write, or -1 for the whole string. /// @param[in] attrs Text attributes for the text, without padding. /// To change the attributes of all output, use attrset(). /// @return The number of characters output. static gsize app_add_utf8_string (Application *self, const gchar *str, chtype attrs, int n) { if (!n) return 0; RowBuffer buf; row_buffer_init (&buf, self); row_buffer_append (&buf, str, attrs); if (n < 0) n = buf.total_width; if (buf.total_width > n) row_buffer_ellipsis (&buf, n, attrs); row_buffer_flush (&buf); for (int i = buf.total_width; i < n; i++) addch (' '); row_buffer_free (&buf); return n; } /// Render the top bar. static void app_redraw_top (Application *self) { attrset (APP_ATTR (HEADER)); mvwhline (stdscr, 0, 0, APP_ATTR (HEADER), COLS); gsize indent = app_add_utf8_string (self, APP_TITLE, A_BOLD, -1); attrset (0); for (guint i = 0; i < self->dictionaries->len; i++) { Dictionary *dict = &g_array_index (self->dictionaries, Dictionary, i); indent += app_add_utf8_string (self, dict->name, (self->dictionaries->len > 1 && self->dict == dict->dict) ? APP_ATTR (ACTIVE) : APP_ATTR (HEADER), MIN (COLS - indent, dict->name_width)); } attrset (APP_ATTR (SEARCH)); mvwhline (stdscr, 1, 0, APP_ATTR (SEARCH), COLS); indent = app_add_utf8_string (self, self->search_label, 0, -1); gchar *input_utf8 = g_ucs4_to_utf8 ((gunichar *) self->input->data, -1, NULL, NULL, NULL); g_return_if_fail (input_utf8 != NULL); int word_attrs = 0; if (self->input_confirmed) word_attrs |= A_BOLD; app_add_utf8_string (self, input_utf8, word_attrs, COLS - indent - 1); g_free (input_utf8); guint offset, i; for (offset = i = 0; i < self->input_pos; i++) // This may be inconsistent with the output of app_add_utf8_string() offset += unichar_width (g_array_index (self->input, gunichar, i)); move (1, MIN ((gint) (indent + offset), COLS - 1)); refresh (); } /// Computes width for the left column. static guint app_get_left_column_width (Application *self) { gint width = COLS * self->division + 0.5; if (width < 1) width = 1; else if (width > COLS - 2) width = COLS - 2; return width; } /// Display a message in the view area. static void app_show_message (Application *self, const gchar *lines[], gsize len) { gint top = (LINES - TOP_BAR_CUTOFF - len) / 2; gint i; for (i = 0; i < top; i++) { move (TOP_BAR_CUTOFF + i, 0); clrtoeol (); } attrset (0); while (len-- && i < LINES - TOP_BAR_CUTOFF) { move (TOP_BAR_CUTOFF + i, 0); clrtoeol (); gint x = (COLS - g_utf8_strlen (*lines, -1)) / 2; if (x < 0) x = 0; move (TOP_BAR_CUTOFF + i, x); app_add_utf8_string (self, *lines, 0, COLS - x); lines++; i++; } clrtobot (); refresh (); } /// Show some information about the program. static void app_show_help (Application *self) { const gchar *lines[] = { PROJECT_NAME " " PROJECT_VERSION, _("Terminal UI for StarDict dictionaries"), "Copyright (c) 2013 - 2016, Přemysl Janouch", "", _("Type to search") }; app_show_message (self, lines, G_N_ELEMENTS (lines)); } /// Redraw the dictionary view. static void app_redraw_view (Application *self) { if (self->show_help) { app_show_help (self); return; } move (TOP_BAR_CUTOFF, 0); clrtobot (); // TODO: clean this stuff up a bit, it's all rather ugly gchar *input_utf8 = g_ucs4_to_utf8 ((gunichar *) self->input->data, -1, NULL, NULL, NULL); guint i, k = self->top_offset, shown = 0; for (i = 0; i < self->entries->len; i++) { ViewEntry *ve = g_ptr_array_index (self->entries, i); for (; k < ve->definitions_length; k++) { int attrs = ((self->top_position + i) & 1) ? APP_ATTR (ODD) : APP_ATTR (EVEN); if (shown == self->selected) attrs |= A_REVERSE; gboolean last = k + 1 == ve->definitions_length; if (last && self->underline_last) attrs |= A_UNDERLINE; attrset (attrs); RowBuffer buf; row_buffer_init (&buf, self); size_t common = 0; if (self->hl_prefix) { common = stardict_longest_common_collation_prefix (self->dict, ve->word, input_utf8); gchar *prefix = g_strndup (ve->word, common); row_buffer_append (&buf, prefix, A_BOLD); g_free (prefix); } row_buffer_append (&buf, ve->word + common, 0); gint left_width = app_get_left_column_width (self); if (buf.total_width > left_width) row_buffer_ellipsis (&buf, left_width, attrs); row_buffer_flush (&buf); for (int i = buf.total_width; i < left_width + 1; i++) addch (' '); row_buffer_free (&buf); app_add_utf8_string (self, ve->definitions[k], 0, COLS - left_width - 1); if ((gint) ++shown == LINES - TOP_BAR_CUTOFF) goto done; } k = 0; } done: free (input_utf8); attrset (0); refresh (); } /// Just prepends a new view entry into the entries array. static ViewEntry * prepend_entry (Application *self, guint32 position) { StardictIterator *iterator = stardict_iterator_new (self->dict, position); ViewEntry *ve = view_entry_new (iterator); g_object_unref (iterator); g_ptr_array_add (self->entries, NULL); memmove (self->entries->pdata + 1, self->entries->pdata, sizeof ve * (self->entries->len - 1)); return g_ptr_array_index (self->entries, 0) = ve; } /// Just appends a new view entry to the entries array. static ViewEntry * append_entry (Application *self, guint32 position) { ViewEntry *ve = NULL; StardictIterator *iterator = stardict_iterator_new (self->dict, position); if (stardict_iterator_is_valid (iterator)) { ve = view_entry_new (iterator); g_ptr_array_add (self->entries, ve); } g_object_unref (iterator); return ve; } /// Counts the number of definitions available for seeing. static guint app_count_view_items (Application *self) { guint i, n_definitions = 0; for (i = 0; i < self->entries->len; i++) { ViewEntry *entry = g_ptr_array_index (self->entries, i); n_definitions += entry->definitions_length; } return n_definitions; } /// Scroll up @a n entries. Doesn't redraw. static gboolean app_scroll_up (Application *self, guint n) { gboolean success = TRUE; guint n_definitions = app_count_view_items (self); while (n--) { if (self->top_offset > 0) { self->top_offset--; continue; } // We've reached the top if (self->top_position == 0) { success = FALSE; break; } ViewEntry *ve = prepend_entry (self, --self->top_position); self->top_offset = ve->definitions_length - 1; n_definitions += ve->definitions_length; // Remove the last entry if not shown ViewEntry *last_entry = g_ptr_array_index (self->entries, self->entries->len - 1); if ((gint) (n_definitions - self->top_offset - last_entry->definitions_length) >= LINES - TOP_BAR_CUTOFF) { n_definitions -= last_entry->definitions_length; g_ptr_array_remove_index_fast (self->entries, self->entries->len - 1); } } return success; } /// Scroll down @a n entries. Doesn't redraw. static gboolean app_scroll_down (Application *self, guint n) { gboolean success = TRUE; guint n_definitions = app_count_view_items (self); while (n--) { if (self->entries->len == 0) { success = FALSE; break; } ViewEntry *first_entry = g_ptr_array_index (self->entries, 0); if (self->top_offset < first_entry->definitions_length - 1) self->top_offset++; else { n_definitions -= first_entry->definitions_length; g_ptr_array_remove_index (self->entries, 0); self->top_position++; self->top_offset = 0; } if ((gint) (n_definitions - self->top_offset) < LINES - TOP_BAR_CUTOFF) { ViewEntry *ve = append_entry (self, self->top_position + self->entries->len); if (ve != NULL) n_definitions += ve->definitions_length; } } // Fix cursor to not point below the view items if (self->selected >= n_definitions - self->top_offset) self->selected = n_definitions - self->top_offset - 1; return success; } /// Moves the selection one entry up. static gboolean app_one_entry_up (Application *self) { if (self->selected == 0 && self->top_offset == 0) { if (self->top_position == 0) return FALSE; prepend_entry (self, --self->top_position); } // Find the last entry that starts above the selection gint first = -self->top_offset; guint i; for (i = 0; i < self->entries->len; i++) { ViewEntry *ve = g_ptr_array_index (self->entries, i); gint new_first = first + ve->definitions_length; if (new_first >= (gint) self->selected) break; first = new_first; } if (first < 0) { self->selected = 0; app_scroll_up (self, -first); } else self->selected = first; app_redraw_view (self); return TRUE; } /// Moves the selection one entry down. static void app_one_entry_down (Application *self) { // Find the first entry that starts below the selection gint first = -self->top_offset; guint i; for (i = 0; i < self->entries->len; i++) { ViewEntry *ve = g_ptr_array_index (self->entries, i); first += ve->definitions_length; if (first > (gint) self->selected) break; } if (first > LINES - TOP_BAR_CUTOFF - 1) { self->selected = LINES - TOP_BAR_CUTOFF - 1; app_scroll_down (self, first - (LINES - TOP_BAR_CUTOFF - 1)); } else self->selected = first; app_redraw_view (self); } /// Redraw everything. static void app_redraw (Application *self) { app_redraw_view (self); app_redraw_top (self); } /// Search for the current entry. static void app_search_for_entry (Application *self) { gchar *input_utf8 = g_ucs4_to_utf8 ((gunichar *) self->input->data, -1, NULL, NULL, NULL); g_return_if_fail (input_utf8 != NULL); StardictIterator *iterator = stardict_dict_search (self->dict, input_utf8, NULL); g_free (input_utf8); self->top_position = stardict_iterator_get_offset (iterator); self->top_offset = 0; self->selected = 0; g_object_unref (iterator); self->show_help = FALSE; app_reload_view (self); // If the user wants it centered, just move the view up half a screen; // actually, one third seems to be a better guess if (self->center_search) { for (int half = (LINES - TOP_BAR_CUTOFF) / 3; half > 0; half--) if (app_scroll_up (self, 1)) self->selected++; else break; } app_redraw_view (self); } /// Switch to a different dictionary by number. static gboolean app_goto_dictionary (Application *self, guint n) { if (n >= self->dictionaries->len) return FALSE; Dictionary *dict = &g_array_index (self->dictionaries, Dictionary, n); self->dict = dict->dict; app_search_for_entry (self); app_redraw_top (self); return TRUE; } /// The terminal has been resized, make appropriate changes. static gboolean app_process_resize (Application *self) { app_reload_view (self); guint n_visible = app_count_view_items (self) - self->top_offset; if ((gint) n_visible > LINES - TOP_BAR_CUTOFF) n_visible = LINES - TOP_BAR_CUTOFF; if (self->selected >= n_visible) { app_scroll_down (self, self->selected - n_visible + 1); self->selected = n_visible - 1; } app_redraw (self); return TRUE; } // --- User input handling ----------------------------------------------------- /// All the actions that can be performed by the user. typedef enum user_action UserAction; enum user_action { USER_ACTION_NONE, USER_ACTION_QUIT, USER_ACTION_REDRAW, USER_ACTION_MOVE_SPLITTER_LEFT, USER_ACTION_MOVE_SPLITTER_RIGHT, USER_ACTION_GOTO_ENTRY_PREVIOUS, USER_ACTION_GOTO_ENTRY_NEXT, USER_ACTION_GOTO_DEFINITION_PREVIOUS, USER_ACTION_GOTO_DEFINITION_NEXT, USER_ACTION_GOTO_PAGE_PREVIOUS, USER_ACTION_GOTO_PAGE_NEXT, USER_ACTION_INPUT_CONFIRM, USER_ACTION_INPUT_HOME, USER_ACTION_INPUT_END, USER_ACTION_INPUT_LEFT, USER_ACTION_INPUT_RIGHT, USER_ACTION_INPUT_DELETE_PREVIOUS, USER_ACTION_INPUT_DELETE_NEXT, USER_ACTION_INPUT_DELETE_TO_HOME, USER_ACTION_INPUT_DELETE_TO_END, USER_ACTION_INPUT_DELETE_PREVIOUS_WORD, USER_ACTION_INPUT_TRANSPOSE, USER_ACTION_COUNT }; #define SAVE_CURSOR \ int last_x, last_y; \ getyx (stdscr, last_y, last_x); #define RESTORE_CURSOR \ move (last_y, last_x); \ refresh (); // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static gboolean app_process_user_action (Application *self, UserAction action) { SAVE_CURSOR switch (action) { case USER_ACTION_QUIT: return FALSE; case USER_ACTION_REDRAW: clear (); app_redraw (self); return TRUE; // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - case USER_ACTION_MOVE_SPLITTER_LEFT: self->division = (app_get_left_column_width (self) - 1.) / COLS; app_redraw_view (self); RESTORE_CURSOR return TRUE; case USER_ACTION_MOVE_SPLITTER_RIGHT: self->division = (app_get_left_column_width (self) + 1.) / COLS; app_redraw_view (self); RESTORE_CURSOR return TRUE; // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - case USER_ACTION_GOTO_DEFINITION_PREVIOUS: if (self->selected > 0) self->selected--; else app_scroll_up (self, 1); app_redraw_view (self); RESTORE_CURSOR return TRUE; case USER_ACTION_GOTO_DEFINITION_NEXT: if ((gint) self->selected < LINES - TOP_BAR_CUTOFF - 1 && self->selected < app_count_view_items (self) - self->top_offset - 1) self->selected++; else app_scroll_down (self, 1); app_redraw_view (self); RESTORE_CURSOR return TRUE; case USER_ACTION_GOTO_ENTRY_PREVIOUS: app_one_entry_up (self); RESTORE_CURSOR return TRUE; case USER_ACTION_GOTO_ENTRY_NEXT: app_one_entry_down (self); RESTORE_CURSOR return TRUE; case USER_ACTION_GOTO_PAGE_PREVIOUS: app_scroll_up (self, LINES - TOP_BAR_CUTOFF); // FIXME: selection app_redraw_view (self); RESTORE_CURSOR return TRUE; case USER_ACTION_GOTO_PAGE_NEXT: app_scroll_down (self, LINES - TOP_BAR_CUTOFF); // FIXME: selection app_redraw_view (self); RESTORE_CURSOR return TRUE; // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - case USER_ACTION_INPUT_HOME: self->input_pos = 0; app_redraw_top (self); return TRUE; case USER_ACTION_INPUT_END: self->input_pos = self->input->len; app_redraw_top (self); return TRUE; case USER_ACTION_INPUT_LEFT: if (self->input_pos > 0) { self->input_pos--; app_redraw_top (self); } return TRUE; case USER_ACTION_INPUT_RIGHT: if (self->input_pos < self->input->len) { self->input_pos++; app_redraw_top (self); } return TRUE; // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - case USER_ACTION_INPUT_CONFIRM: self->input_confirmed = TRUE; app_redraw_top (self); return TRUE; case USER_ACTION_INPUT_TRANSPOSE: { if (!self->input_pos || self->input->len < 2) break; guint start = self->input_pos - 1; if (self->input_pos >= self->input->len) start--; gunichar tmp = g_array_index (self->input, gunichar, start); g_array_index (self->input, gunichar, start) = g_array_index (self->input, gunichar, start + 1); g_array_index (self->input, gunichar, start + 1) = tmp; if (self->input_pos < self->input->len) self->input_pos++; app_search_for_entry (self); app_redraw_top (self); return TRUE; } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - case USER_ACTION_INPUT_DELETE_PREVIOUS: if (self->input_pos > 0) { g_array_remove_index (self->input, --self->input_pos); app_search_for_entry (self); app_redraw_top (self); } return TRUE; case USER_ACTION_INPUT_DELETE_NEXT: if (self->input_pos < self->input->len) { g_array_remove_index (self->input, self->input_pos); app_search_for_entry (self); app_redraw_top (self); } return TRUE; case USER_ACTION_INPUT_DELETE_TO_HOME: if (self->input->len != 0) { g_array_remove_range (self->input, 0, self->input_pos); self->input_pos = 0; app_search_for_entry (self); app_redraw_top (self); } return TRUE; case USER_ACTION_INPUT_DELETE_TO_END: if (self->input_pos < self->input->len) { g_array_remove_range (self->input, self->input_pos, self->input->len - self->input_pos); app_search_for_entry (self); app_redraw_top (self); } return TRUE; case USER_ACTION_INPUT_DELETE_PREVIOUS_WORD: { if (self->input_pos == 0) return TRUE; gint i = self->input_pos; while (i) if (g_array_index (self->input, gunichar, --i) != L' ') break; while (i--) if (g_array_index (self->input, gunichar, i) == L' ') break; i++; g_array_remove_range (self->input, i, self->input_pos - i); self->input_pos = i; app_search_for_entry (self); app_redraw_top (self); return TRUE; } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - case USER_ACTION_NONE: return TRUE; default: g_assert_not_reached (); } return TRUE; } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static gboolean app_process_keysym (Application *self, termo_key_t *event) { UserAction action = USER_ACTION_NONE; typedef const UserAction ActionMap[TERMO_N_SYMS]; static ActionMap actions = { [TERMO_SYM_ESCAPE] = USER_ACTION_QUIT, [TERMO_SYM_UP] = USER_ACTION_GOTO_DEFINITION_PREVIOUS, [TERMO_SYM_DOWN] = USER_ACTION_GOTO_DEFINITION_NEXT, [TERMO_SYM_PAGEUP] = USER_ACTION_GOTO_PAGE_PREVIOUS, [TERMO_SYM_PAGEDOWN] = USER_ACTION_GOTO_PAGE_NEXT, [TERMO_SYM_ENTER] = USER_ACTION_INPUT_CONFIRM, [TERMO_SYM_HOME] = USER_ACTION_INPUT_HOME, [TERMO_SYM_END] = USER_ACTION_INPUT_END, [TERMO_SYM_LEFT] = USER_ACTION_INPUT_LEFT, [TERMO_SYM_RIGHT] = USER_ACTION_INPUT_RIGHT, [TERMO_SYM_BACKSPACE] = USER_ACTION_INPUT_DELETE_PREVIOUS, [TERMO_SYM_DEL] = USER_ACTION_INPUT_DELETE_PREVIOUS, [TERMO_SYM_DELETE] = USER_ACTION_INPUT_DELETE_NEXT, }; static ActionMap actions_alt = { [TERMO_SYM_LEFT] = USER_ACTION_MOVE_SPLITTER_LEFT, [TERMO_SYM_RIGHT] = USER_ACTION_MOVE_SPLITTER_RIGHT, }; static ActionMap actions_ctrl = { [TERMO_SYM_UP] = USER_ACTION_GOTO_ENTRY_PREVIOUS, [TERMO_SYM_DOWN] = USER_ACTION_GOTO_ENTRY_NEXT, }; if (!event->modifiers) action = actions[event->code.sym]; else if (event->modifiers == TERMO_KEYMOD_ALT) action = actions_alt[event->code.sym]; else if (event->modifiers == TERMO_KEYMOD_CTRL) action = actions_ctrl[event->code.sym]; return app_process_user_action (self, action); } static gboolean app_process_ctrl_key (Application *self, termo_key_t *event) { static const UserAction actions[32] = { [CTRL_KEY ('L')] = USER_ACTION_REDRAW, [CTRL_KEY ('P')] = USER_ACTION_GOTO_DEFINITION_PREVIOUS, [CTRL_KEY ('N')] = USER_ACTION_GOTO_DEFINITION_NEXT, [CTRL_KEY ('B')] = USER_ACTION_GOTO_PAGE_PREVIOUS, [CTRL_KEY ('F')] = USER_ACTION_GOTO_PAGE_NEXT, [CTRL_KEY ('A')] = USER_ACTION_INPUT_HOME, [CTRL_KEY ('E')] = USER_ACTION_INPUT_END, [CTRL_KEY ('H')] = USER_ACTION_INPUT_DELETE_PREVIOUS, [CTRL_KEY ('K')] = USER_ACTION_INPUT_DELETE_TO_END, [CTRL_KEY ('W')] = USER_ACTION_INPUT_DELETE_PREVIOUS_WORD, [CTRL_KEY ('U')] = USER_ACTION_INPUT_DELETE_TO_HOME, [CTRL_KEY ('T')] = USER_ACTION_INPUT_TRANSPOSE, }; gint64 i = (gint64) event->code.codepoint - 'a' + 1; if (i > 0 && i < (gint64) G_N_ELEMENTS (actions)) return app_process_user_action (self, actions[i]); return TRUE; } static gboolean app_process_alt_key (Application *self, termo_key_t *event) { if (event->code.codepoint == 'c') self->center_search = !self->center_search; if (event->code.codepoint >= '0' && event->code.codepoint <= '9') { gint n = event->code.codepoint - '0'; if (!app_goto_dictionary (self, (n == 0 ? 10 : n) - 1)) beep (); } return TRUE; } static gboolean app_process_key (Application *self, termo_key_t *event) { if (event->modifiers == TERMO_KEYMOD_CTRL) return app_process_ctrl_key (self, event); if (event->modifiers == TERMO_KEYMOD_ALT) return app_process_alt_key (self, event); if (event->modifiers) return TRUE; gunichar c = event->code.codepoint; if (!g_unichar_isprint (c)) { beep (); return TRUE; } if (self->input_confirmed) { if (self->input->len != 0) g_array_remove_range (self->input, 0, self->input->len); self->input_pos = 0; self->input_confirmed = FALSE; } g_array_insert_val (self->input, self->input_pos++, c); app_search_for_entry (self); app_redraw_top (self); return TRUE; } static void app_process_left_mouse_click (Application *self, int line, int column) { SAVE_CURSOR if (line == 0) { int indent = strlen (APP_TITLE); if (column < indent) return; Dictionary *dicts = (Dictionary *) self->dictionaries->data; for (guint i = 0; i < self->dictionaries->len; i++) { if (column < (indent += dicts[i].name_width)) { app_goto_dictionary (self, i); return; } } } else if (line == 1) { // FIXME: this is only an approximation gsize label_len = g_utf8_strlen (self->search_label, -1); gint pos = column - label_len; if (pos >= 0) { self->input_pos = MIN ((guint) pos, self->input->len); move (1, label_len + self->input_pos); refresh (); } } else if (line <= (int) (app_count_view_items (self) - self->top_offset)) { self->selected = line - TOP_BAR_CUTOFF; app_redraw_view (self); RESTORE_CURSOR } } /// Process mouse input. static gboolean app_process_mouse (Application *self, termo_key_t *event) { int line, column, button; termo_mouse_event_t type; termo_interpret_mouse (self->tk, event, &type, &button, &line, &column); if (type != TERMO_MOUSE_PRESS) return TRUE; if (button == 1) app_process_left_mouse_click (self, line, column); else if (button == 4) app_process_user_action (self, USER_ACTION_GOTO_DEFINITION_PREVIOUS); else if (button == 5) app_process_user_action (self, USER_ACTION_GOTO_DEFINITION_NEXT); return TRUE; } /// Process input events from the terminal. static gboolean app_process_termo_event (Application *self, termo_key_t *event) { switch (event->type) { case TERMO_TYPE_MOUSE: return app_process_mouse (self, event); case TERMO_TYPE_KEY: return app_process_key (self, event); case TERMO_TYPE_KEYSYM: return app_process_keysym (self, event); default: return TRUE; } } // --- SIGWINCH ---------------------------------------------------------------- static int g_winch_pipe[2]; ///< SIGWINCH signalling pipe. static void winch_handler (int signum) { (void) signum; write (g_winch_pipe[1], "x", 1); } static void install_winch_handler (void) { struct sigaction act, oldact; if (pipe (g_winch_pipe) == -1) abort (); act.sa_handler = winch_handler; act.sa_flags = SA_RESTART; sigemptyset (&act.sa_mask); sigaction (SIGWINCH, &act, &oldact); } // --- Initialisation, event handling ------------------------------------------ static gboolean on_stdin_input_timeout (gpointer data); static gboolean process_stdin_input (G_GNUC_UNUSED GIOChannel *source, G_GNUC_UNUSED GIOCondition condition, gpointer data) { Application *app = data; if (app->tk_timer) { g_source_remove (app->tk_timer); app->tk_timer = 0; } termo_advisereadable (app->tk); termo_key_t event; termo_result_t res; while ((res = termo_getkey (app->tk, &event)) == TERMO_RES_KEY) if (!app_process_termo_event (app, &event)) goto quit; if (res == TERMO_RES_AGAIN) app->tk_timer = g_timeout_add (termo_get_waittime (app->tk), on_stdin_input_timeout, app); else if (res == TERMO_RES_ERROR || res == TERMO_RES_EOF) goto quit; return TRUE; quit: app_quit (app); return FALSE; } static gboolean on_stdin_input_timeout (gpointer data) { Application *app = data; termo_key_t event; if (termo_getkey_force (app->tk, &event) == TERMO_RES_KEY) if (!app_process_termo_event (app, &event)) app_quit (app); app->tk_timer = 0; return FALSE; } static gboolean process_winch_input (GIOChannel *source, G_GNUC_UNUSED GIOCondition condition, gpointer data) { char c; (void) read (g_io_channel_unix_get_fd (source), &c, 1); update_curses_terminal_size (); app_process_resize (data); return TRUE; } static gboolean on_terminated (gpointer user_data) { app_quit (user_data); return TRUE; } #ifdef WITH_GTK static void app_set_input (Application *self, const gchar *input) { glong size; gunichar *output = g_utf8_to_ucs4 (input, -1, NULL, &size, NULL); // XXX: signal invalid data? if (!output) return; g_array_free (self->input, TRUE); self->input = g_array_new (TRUE, FALSE, sizeof (gunichar)); self->input_pos = 0; gunichar *p = output; while (size--) { // XXX: skip? if (!g_unichar_isprint (*p)) break; g_array_insert_val (self->input, self->input_pos++, *p++); } g_free (output); self->input_confirmed = FALSE; app_search_for_entry (self); app_redraw_top (self); } static void on_selection_text_received (G_GNUC_UNUSED GtkClipboard *clipboard, const gchar *text, gpointer data) { Application *app = data; rearm_selection_watcher (app); if (text) { if (app->selection_contents && !strcmp (app->selection_contents, text)) return; g_free (app->selection_contents); app->selection_contents = g_strdup (text); app_set_input (app, text); } else if (app->selection_contents) { g_free (app->selection_contents); app->selection_contents = NULL; } } static gboolean on_selection_timer (gpointer data) { Application *app = data; GtkClipboard *clipboard = gtk_clipboard_get (GDK_SELECTION_PRIMARY); gtk_clipboard_request_text (clipboard, on_selection_text_received, app); app->selection_timer = 0; return FALSE; } static gboolean on_watch_primary_selection (G_GNUC_UNUSED const gchar *option_name, const gchar *value, gpointer data, GError **error) { AppOptions *options = data; if (!value) { options->selection_watcher = 500; return TRUE; } unsigned long timer; if (!xstrtoul (&timer, value, 10) || !timer || timer > G_MAXINT) { g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_FAILED, _("Invalid timer value")); return FALSE; } options->selection_watcher = timer; return TRUE; } #endif // WITH_GTK static void log_handler_curses (Application *self, const gchar *message) { // Beep, beep, I'm a jeep; let the user know beep (); // We certainly don't want to end up in a possibly infinite recursion static gboolean in_processing; if (in_processing) return; in_processing = TRUE; SAVE_CURSOR attrset (A_REVERSE); mvwhline (stdscr, 0, 0, A_REVERSE, COLS); app_add_utf8_string (self, message, 0, COLS); RESTORE_CURSOR in_processing = FALSE; } static void log_handler (const gchar *domain, GLogLevelFlags level, const gchar *message, gpointer data) { // There's probably no point in trying to display a fatal message nicely if (level & G_LOG_FLAG_FATAL) g_log_default_handler (domain, level, message, NULL); const gchar *prefix; switch (level & G_LOG_LEVEL_MASK) { case G_LOG_LEVEL_ERROR: prefix = "E"; break; case G_LOG_LEVEL_CRITICAL: prefix = "C"; break; case G_LOG_LEVEL_WARNING: prefix = "W"; break; case G_LOG_LEVEL_MESSAGE: prefix = "M"; break; case G_LOG_LEVEL_INFO: prefix = "I"; break; case G_LOG_LEVEL_DEBUG: prefix = "D"; break; default: prefix = "?"; } gchar *out; if (domain) out = g_strdup_printf ("%s: %s: %s", prefix, domain, message); else out = g_strdup_printf ("%s: %s", prefix, message); // If the standard error output isn't redirected, try our best at showing // the message to the user; it will probably get overdrawn soon if (isatty (STDERR_FILENO)) log_handler_curses (data, out); else fprintf (stderr, "%s\n", out); g_free (out); } int main (int argc, char *argv[]) { G_GNUC_BEGIN_IGNORE_DEPRECATIONS if (glib_check_version (2, 36, 0)) g_type_init (); G_GNUC_END_IGNORE_DEPRECATIONS AppOptions options = { .show_version = FALSE, .selection_watcher = -1, }; GOptionEntry entries[] = { { "version", 0, G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE, &options.show_version, N_("Output version information and exit"), NULL }, #ifdef WITH_GTK { "watch-primary-selection", 'w', G_OPTION_FLAG_IN_MAIN | G_OPTION_FLAG_OPTIONAL_ARG, G_OPTION_ARG_CALLBACK, (gpointer) on_watch_primary_selection, N_("Watch the value of the primary selection for input"), N_("TIMER") }, #endif // WITH_GTK { NULL } }; if (!setlocale (LC_ALL, "")) g_printerr ("%s: %s\n", _("Warning"), _("failed to set the locale")); bindtextdomain (GETTEXT_PACKAGE, GETTEXT_DIRNAME); bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8"); textdomain (GETTEXT_PACKAGE); GError *error = NULL; GOptionContext *ctx = g_option_context_new (N_("[dictionary.ifo]... - StarDict terminal UI")); GOptionGroup *group = g_option_group_new ("", "", "", &options, NULL); g_option_group_add_entries (group, entries); g_option_group_set_translation_domain (group, GETTEXT_PACKAGE); g_option_context_add_group (ctx, group); g_option_context_set_translation_domain (ctx, GETTEXT_PACKAGE); if (!g_option_context_parse (ctx, &argc, &argv, &error)) { g_printerr ("%s: %s: %s\n", _("Error"), _("option parsing failed"), error->message); exit (EXIT_FAILURE); } g_option_context_free (ctx); if (options.show_version) { g_print (PROJECT_NAME " " PROJECT_VERSION "\n"); exit (EXIT_SUCCESS); } Application app; app_init (&app, &options, argv + 1); app_init_terminal (&app); app_redraw (&app); // g_unix_signal_add() cannot handle SIGWINCH install_winch_handler (); // GtkClipboard can internally issue some rather disruptive warnings g_log_set_default_handler (log_handler, &app); // Message loop guint watch_term = g_unix_signal_add (SIGTERM, on_terminated, &app); guint watch_int = g_unix_signal_add (SIGINT, on_terminated, &app); guint watch_stdin = g_io_add_watch (g_io_channel_unix_new (STDIN_FILENO), G_IO_IN, process_stdin_input, &app); guint watch_winch = g_io_add_watch (g_io_channel_unix_new (g_winch_pipe[0]), G_IO_IN, process_winch_input, &app); app_run (&app); g_source_remove (watch_term); g_source_remove (watch_int); g_source_remove (watch_stdin); g_source_remove (watch_winch); endwin (); g_log_set_default_handler (g_log_default_handler, NULL); app_destroy (&app); if (close (g_winch_pipe[0]) == -1 || close (g_winch_pipe[1]) == -1) abort (); return 0; }