--- /dev/null
+/* gtkspell - a spell-checking addon for GtkText
+ * Copyright (c) 2000 Evan Martin.
+ * vim: ts=4 sw=4
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <gtk/gtk.h>
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <sys/time.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <signal.h>
+#include <ctype.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#define GTKSPELL_USE_GNOME
+
+#ifdef GTKSPELL_USE_GNOME
+#include <gnome.h>
+#endif /* GTKSPELL_USE_GNOME */
+
+#include "gtkspell.h"
+
+/* TODO:
+ * handle dictionary changes
+ * asynchronous lookups
+ */
+
+/* size of the text buffer used in various word-processing routines. */
+#define BUFSIZE 1024
+/* number of suggestions to display on each menu. */
+#define MENUCOUNT 10
+#define BUGEMAIL "gtkspell-devel@lists.sourceforge.net"
+
+/* because we keep only one copy of the spell program running,
+ * all ispell-related variables can be static.
+ */
+static pid_t spell_pid = -1;
+static int fd_write[2] = {0}, fd_read[2] = {0};
+static int signal_set_up = 0;
+
+/* FIXME? */
+static GdkColor highlight = { 0, 255*256, 0, 0 };
+
+static void entry_insert_cb(GtkText *gtktext,
+ gchar *newtext, guint len, guint *ppos, gpointer d);
+static void set_up_signal();
+
+int gtkspell_running() {
+ return (spell_pid > 0);
+}
+
+static void error_print(const char *fmt, ...) {
+ va_list ap;
+ va_start(ap, fmt);
+ fprintf(stderr, "gtkspell: ");
+ vfprintf(stderr, fmt, ap);
+ va_end(ap);
+}
+
+/* functions to interface with pipe */
+static void writetext(char *text) {
+ write(fd_write[1], text, strlen(text));
+}
+static int readpipe(char *buf, int bufsize) {
+ int len;
+ len = read(fd_read[0], buf, bufsize-1);
+ if (len < 0) {
+ error_print("read: %s\n", strerror(errno));
+ return -1;
+ } else if (len == 0) {
+ error_print("pipe closed.\n");
+ return -1;
+ } else if (len == bufsize-1) {
+ error_print("buffer overflowed?\n");
+ }
+
+ buf[len] = 0;
+ return len;
+}
+static int readline(char *buf) {
+ return readpipe(buf, BUFSIZE);
+}
+
+static int readresponse(char *buf) {
+ int len;
+ len = readpipe(buf, BUFSIZE);
+
+ /* all ispell responses of any reasonable length should end in \n\n.
+ * depending on the speed of the spell checker, this may require more
+ * reading. */
+ if (len >= 2 && (buf[len-1] != '\n' || buf[len-2] != '\n')) {
+ len += readpipe(buf+len, BUFSIZE-len);
+ }
+
+ /* now we can remove all of the the trailing newlines. */
+ while (len > 0 && buf[len-1] == '\n')
+ buf[--len] = 0;
+
+ return len;
+}
+
+
+void gtkspell_stop() {
+ if (gtkspell_running()) {
+ kill(spell_pid, SIGHUP);
+ spell_pid = 0;
+ close(fd_read[0]);
+ close(fd_write[1]);
+ }
+}
+
+int gtkspell_start(char *path, char * args[]) {
+ int fd_error[2];
+ char buf[BUFSIZE];
+
+ if (gtkspell_running()) {
+ error_print("gtkspell_start called while already running.\n");
+ gtkspell_stop();
+ }
+
+ if (!signal_set_up) {
+ set_up_signal();
+ signal_set_up = 1;
+ }
+
+ pipe(fd_write);
+ pipe(fd_read);
+ pipe(fd_error);
+
+ spell_pid = fork();
+ if (spell_pid < 0) {
+ error_print("fork: %s\n", strerror(errno));
+ return -1;
+ } else if (spell_pid == 0) {
+ dup2(fd_write[0], 0);
+ close(fd_write[0]);
+ close(fd_write[1]);
+
+ dup2(fd_read[1], 1);
+ close(fd_read[0]);
+ close(fd_read[1]);
+
+ dup2(fd_error[1], 2);
+ close(fd_error[0]);
+ close(fd_error[1]);
+
+ if (path == NULL) {
+ if (execvp(args[0], args) < 0)
+ error_print("execvp('%s'): %s\n", args[0], strerror(errno));
+ } else {
+ if (execv(path, args) < 0)
+ error_print("execv('%s'): %s\n", path, strerror(errno));
+ }
+ /* if we get here, we failed.
+ * send some text on the pipe to indicate status.
+ */
+ write(0, "!", 1); /* stdout _is_ the pipe. */
+
+ _exit(0);
+ } else {
+ /* there are at least two ways to fail:
+ * - the exec() can fail
+ * - the exec() can succeed, but the program can dump the help screen
+ * we must check for both.
+ */
+ fd_set rfds;
+ struct timeval tv;
+
+ close(fd_write[0]);
+ close(fd_read[1]);
+
+ FD_ZERO(&rfds);
+ FD_SET(fd_error[0], &rfds);
+ FD_SET(fd_read[0], &rfds);
+ tv.tv_sec = 2;
+ tv.tv_usec = 0;
+
+ if (select(MAX(fd_error[0], fd_read[0])+1,
+ &rfds, NULL, NULL, &tv) < 0) {
+ /* FIXME: is this needed? */
+ error_print("Timed out waiting for spell command.\n");
+ gtkspell_stop();
+ return -1;
+ }
+
+ if (FD_ISSET(fd_error[0], &rfds)) { /* stderr readable? */
+ error_print("Spell command printed on stderr -- probably failed.\n");
+ gtkspell_stop();
+ return -1;
+ }
+
+ /* we're done with stderr, now. */
+ close(fd_error[0]);
+ close(fd_error[1]);
+
+ /* otherwise, fd_read[0] is set. */
+ readline(buf);
+
+ /* ispell should print something like this:
+ * @(#) International Ispell Version 3.1.20 10/10/95
+ * if it doesn't, it's an error. */
+ if (buf[0] != '@') {
+ gtkspell_stop();
+ return -1;
+ }
+ }
+
+ /* put ispell into terse mode.
+ * this makes it not respond on correctly spelled words. */
+ sprintf(buf, "!\n");
+ writetext(buf);
+ return 0;
+}
+
+static GList* misspelled_suggest(char *word) {
+ char buf[BUFSIZE];
+ char *newword;
+ GList *l = NULL;
+ int count;
+
+ sprintf(buf, "^%s\n", word); /* guard against ispell control chars */
+ writetext(buf);
+ readresponse(buf);
+
+ switch (buf[0]) { /* first char is ispell command. */
+ case 0: /* no response: word is ok. */
+ return NULL;
+ case '&': /* misspelled, with suggestions */
+ /* & <orig> <count> <ofs>: <miss>, <miss>, <guess>, ... */
+ strtok(buf, " "); /* & */
+ newword = strtok(NULL, " "); /* orig */
+ l = g_list_append(l, g_strdup(newword));
+ newword = strtok(NULL, " "); /* count */
+ count = atoi(newword);
+ strtok(NULL, " "); /* ofs: */
+
+ while ((newword = strtok(NULL, ",")) != NULL) {
+ int len = strlen(newword);
+ if (newword[len-1] == ' ' || newword[len-1] == '\n')
+ newword[len-1] = 0;
+ if (count == 0) {
+ g_list_append(l, NULL); /* signal the "suggestions" */
+ }
+ /* add it to the list, skipping the initial space. */
+ l = g_list_append(l,
+ g_strdup(newword[0] == ' ' ? newword+1 : newword));
+
+ count--;
+ }
+ return l;
+
+ case '#': /* misspelled, no suggestions */
+ case '?': /* ispell is guessing. */
+ /* # <orig> <ofs> */
+ strtok(buf, " "); /* & */
+ newword = strtok(NULL, " "); /* orig */
+ l = g_list_append(l, g_strdup(newword));
+ return l;
+ default:
+ error_print("Unsupported spell command '%c'.\n"
+ "This is a bug; mail " BUGEMAIL " about it.\n", buf[0]);
+ error_print("Input [%s]\nOutput [%s]\n", word, buf);
+
+ }
+ return NULL;
+}
+
+static int misspelled_test(char *word) {
+ char buf[BUFSIZE];
+ sprintf(buf, "^%s\n", word); /* guard against ispell control chars */
+ writetext(buf);
+ readresponse(buf);
+
+ if (buf[0] == 0) {
+ return 0;
+ } else if (buf[0] == '&' || buf[0] == '#' || buf[0] == '?') {
+ return 1;
+ }
+
+ error_print("Unsupported spell command '%c'.\n"
+ "This is a bug; mail " BUGEMAIL " about it.\n", buf[0]);
+ error_print("Input [%s]\nOutput [%s]\n", word, buf);
+ return -1;
+}
+
+static gboolean iswordsep(char c) {
+ return !isalpha(c) && c != '\'';
+}
+
+static gboolean get_word_from_pos(GtkText* gtktext, int pos, char* buf,
+ int *pstart, int *pend) {
+ gint start, end;
+
+ if (iswordsep(GTK_TEXT_INDEX(gtktext, pos))) return FALSE;
+
+ for (start = pos; start >= 0; --start) {
+ if (iswordsep(GTK_TEXT_INDEX(gtktext, start))) break;
+ }
+ start++;
+
+ for (end = pos; end <= gtk_text_get_length(gtktext); end++) {
+ if (iswordsep(GTK_TEXT_INDEX(gtktext, end))) break;
+ }
+
+ if (buf) {
+ for (pos = start; pos < end; pos++)
+ buf[pos-start] = GTK_TEXT_INDEX(gtktext, pos);
+ buf[pos-start] = 0;
+ }
+
+ if (pstart) *pstart = start;
+ if (pend) *pend = end;
+
+ return TRUE;
+}
+
+static gboolean get_curword(GtkText* gtktext, char* buf,
+ int *pstart, int *pend) {
+ int pos = gtk_editable_get_position(GTK_EDITABLE(gtktext));
+ return get_word_from_pos(gtktext, pos, buf, pstart, pend);
+}
+
+static void change_color(GtkText *gtktext,
+ int start, int end, GdkColor *color) {
+ char *newtext = gtk_editable_get_chars(GTK_EDITABLE(gtktext), start, end);
+ gtk_text_freeze(gtktext);
+ gtk_signal_handler_block_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(entry_insert_cb), NULL);
+
+ gtk_text_set_point(gtktext, start);
+ gtk_text_forward_delete(gtktext, end-start);
+
+ if (newtext && end-start > 0)
+ gtk_text_insert(gtktext, NULL, color, NULL, newtext, end-start);
+
+ gtk_signal_handler_unblock_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(entry_insert_cb), NULL);
+ gtk_text_thaw(gtktext);
+ g_free(newtext);
+}
+
+static gboolean check_at(GtkText *gtktext, int from_pos) {
+ int start, end;
+ char buf[BUFSIZE];
+
+ if (!get_word_from_pos(gtktext, from_pos, buf, &start, &end)) {
+ return FALSE;
+ }
+
+ if (misspelled_test(buf)) {
+ if (highlight.pixel == 0) {
+ /* add an entry for the highlight in the color map. */
+ GdkColormap *gc = gtk_widget_get_colormap(GTK_WIDGET(gtktext));
+ gdk_colormap_alloc_color(gc, &highlight, FALSE, TRUE);;
+ }
+ change_color(gtktext, start, end, &highlight);
+ return TRUE;
+ } else {
+ change_color(gtktext, start, end,
+ &(GTK_WIDGET(gtktext)->style->fg[0]));
+ return FALSE;
+ }
+}
+
+void gtkspell_check_all(GtkText *gtktext) {
+ guint origpos;
+ guint pos = 0;
+ guint len;
+ float adj_value;
+
+ if (!gtkspell_running()) return;
+
+ len = gtk_text_get_length(gtktext);
+
+ adj_value = gtktext->vadj->value;
+ gtk_text_freeze(gtktext);
+ origpos = gtk_editable_get_position(GTK_EDITABLE(gtktext));
+ while (pos < len) {
+ while (pos < len && iswordsep(GTK_TEXT_INDEX(gtktext, pos)))
+ pos++;
+ while (pos < len && !iswordsep(GTK_TEXT_INDEX(gtktext, pos)))
+ pos++;
+ if (pos > 0)
+ check_at(gtktext, pos-1);
+ }
+ gtk_text_thaw(gtktext);
+ gtk_editable_set_position(GTK_EDITABLE(gtktext), origpos);
+}
+
+static void entry_insert_cb(GtkText *gtktext,
+ gchar *newtext, guint len, guint *ppos, gpointer d) {
+ int origpos;
+
+ if (!gtkspell_running()) return;
+
+ gtk_signal_handler_block_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(entry_insert_cb),
+ NULL);
+ gtk_text_insert(GTK_TEXT(gtktext), NULL,
+ &(GTK_WIDGET(gtktext)->style->fg[0]), NULL, newtext, len);
+ gtk_signal_handler_unblock_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(entry_insert_cb),
+ NULL);
+ gtk_signal_emit_stop_by_name(GTK_OBJECT(gtktext), "insert-text");
+ *ppos += len;
+
+ origpos = gtk_editable_get_position(GTK_EDITABLE(gtktext));
+
+ if (iswordsep(newtext[0])) {
+ /* did we just end a word? */
+ if (*ppos >= 2) check_at(gtktext, *ppos-2);
+
+ /* did we just split a word? */
+ if (*ppos < gtk_text_get_length(gtktext))
+ check_at(gtktext, *ppos+1);
+ } else {
+ /* check as they type, *except* if they're typing at the end (the most
+ * common case.
+ */
+ if (*ppos < gtk_text_get_length(gtktext) &&
+ !iswordsep(GTK_TEXT_INDEX(gtktext, *ppos)))
+ check_at(gtktext, *ppos-1);
+ }
+
+ gtk_editable_set_position(GTK_EDITABLE(gtktext), origpos);
+ gtk_editable_select_region(GTK_EDITABLE(gtktext), origpos, origpos);
+}
+
+static void entry_delete_cb(GtkText *gtktext,
+ gint start, gint end, gpointer d) {
+ int origpos;
+
+ if (!gtkspell_running()) return;
+
+ origpos = gtk_editable_get_position(GTK_EDITABLE(gtktext));
+ check_at(gtktext, start-1);
+ gtk_editable_set_position(GTK_EDITABLE(gtktext), origpos);
+ gtk_editable_select_region(GTK_EDITABLE(gtktext), origpos, origpos);
+ /* this is to *UNDO* the selection, in case they were holding shift
+ * while hitting backspace. */
+}
+
+static void replace_word(GtkWidget *w, gpointer d) {
+ int start, end;
+ char *newword;
+ char buf[BUFSIZE];
+
+ /* we don't save their position,
+ * because the cursor is moved by the click. */
+
+ gtk_text_freeze(GTK_TEXT(d));
+
+ gtk_label_get(GTK_LABEL(GTK_BIN(w)->child), &newword);
+ get_curword(GTK_TEXT(d), buf, &start, &end);
+
+ gtk_text_set_point(GTK_TEXT(d), end);
+ gtk_text_backward_delete(GTK_TEXT(d), end-start);
+ gtk_text_insert(GTK_TEXT(d), NULL, NULL, NULL, newword, strlen(newword));
+
+ gtk_text_thaw(GTK_TEXT(d));
+}
+
+static GtkMenu *make_menu(GList *l, GtkText *gtktext) {
+ GtkWidget *menu, *item;
+ char *caption;
+ menu = gtk_menu_new(); {
+ caption = g_strdup_printf("Not in dictionary: %s", (char*)l->data);
+ item = gtk_menu_item_new_with_label(caption);
+ /* I'd like to make it so this item is never selectable, like
+ * the menu titles in the GNOME panel... unfortunately, the GNOME
+ * panel creates their own custom widget to do this! */
+ gtk_widget_show(item);
+ gtk_menu_append(GTK_MENU(menu), item);
+
+ item = gtk_menu_item_new();
+ gtk_widget_show(item);
+ gtk_menu_append(GTK_MENU(menu), item);
+
+ l = l->next;
+ if (l == NULL) {
+ item = gtk_menu_item_new_with_label("(no suggestions)");
+ gtk_widget_show(item);
+ gtk_menu_append(GTK_MENU(menu), item);
+ } else {
+ GtkWidget *curmenu = menu;
+ int count = 0;
+ do {
+ if (l->data == NULL && l->next != NULL) {
+ count = 0;
+ curmenu = gtk_menu_new();
+ item = gtk_menu_item_new_with_label("Other Possibilities...");
+ gtk_widget_show(item);
+ gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), curmenu);
+ gtk_menu_append(GTK_MENU(curmenu), item);
+ l = l->next;
+ } else if (count > MENUCOUNT) {
+ count -= MENUCOUNT;
+ item = gtk_menu_item_new_with_label("More...");
+ gtk_widget_show(item);
+ gtk_menu_append(GTK_MENU(curmenu), item);
+ curmenu = gtk_menu_new();
+ gtk_menu_item_set_submenu(GTK_MENU_ITEM(item), curmenu);
+ }
+ item = gtk_menu_item_new_with_label((char*)l->data);
+ gtk_signal_connect(GTK_OBJECT(item), "activate",
+ GTK_SIGNAL_FUNC(replace_word), gtktext);
+ gtk_widget_show(item);
+ gtk_menu_append(GTK_MENU(curmenu), item);
+ count++;
+ } while ((l = l->next) != NULL);
+ }
+ }
+ return GTK_MENU(menu);
+}
+
+static void popup_menu(GtkText *gtktext, GdkEventButton *eb) {
+ char buf[BUFSIZE];
+ GList *list, *l;
+
+ get_curword(gtktext, buf, NULL, NULL);
+
+ list = misspelled_suggest(buf);
+ if (list != NULL) {
+ gtk_menu_popup(make_menu(list, gtktext), NULL, NULL, NULL, NULL,
+ eb->button, eb->time);
+ for (l = list; l != NULL; l = l->next)
+ g_free(l->data);
+ g_list_free(list);
+ }
+}
+
+/* ok, this is pretty wacky:
+ * we need to let the right-mouse-click go through, so it moves the cursor,
+ * but we *can't* let it go through, because GtkText interprets rightclicks as
+ * weird selection modifiers.
+ *
+ * so what do we do? forge rightclicks as leftclicks, then popup the menu.
+ * HACK HACK HACK.
+ */
+static gint button_press_intercept_cb(GtkText *gtktext, GdkEvent *e, gpointer d) {
+ GdkEventButton *eb;
+ gboolean retval;
+
+ if (!gtkspell_running()) return FALSE;
+
+ if (e->type != GDK_BUTTON_PRESS) return FALSE;
+ eb = (GdkEventButton*) e;
+
+ if (eb->button != 3) return FALSE;
+
+ /* forge the leftclick */
+ eb->button = 1;
+
+ gtk_signal_handler_block_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(button_press_intercept_cb), d);
+ gtk_signal_emit_by_name(GTK_OBJECT(gtktext), "button-press-event",
+ e, &retval);
+ gtk_signal_handler_unblock_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(button_press_intercept_cb), d);
+ gtk_signal_emit_stop_by_name(GTK_OBJECT(gtktext), "button-press-event");
+
+ /* now do the menu wackiness */
+ popup_menu(gtktext, eb);
+ return TRUE;
+}
+
+void gtkspell_uncheck_all(GtkText *gtktext) {
+ int origpos;
+ char *text;
+ float adj_value;
+
+ adj_value = gtktext->vadj->value;
+ gtk_text_freeze(gtktext);
+ origpos = gtk_editable_get_position(GTK_EDITABLE(gtktext));
+ text = gtk_editable_get_chars(GTK_EDITABLE(gtktext), 0, -1);
+ gtk_text_set_point(gtktext, 0);
+ gtk_text_forward_delete(gtktext, gtk_text_get_length(gtktext));
+ gtk_text_insert(gtktext, NULL, NULL, NULL, text, strlen(text));
+ gtk_text_thaw(gtktext);
+
+ gtk_editable_set_position(GTK_EDITABLE(gtktext), origpos);
+ gtk_adjustment_set_value(gtktext->vadj, adj_value);
+}
+
+void gtkspell_attach(GtkText *gtktext) {
+ gtk_signal_connect(GTK_OBJECT(gtktext), "insert-text",
+ GTK_SIGNAL_FUNC(entry_insert_cb), NULL);
+ gtk_signal_connect_after(GTK_OBJECT(gtktext), "delete-text",
+ GTK_SIGNAL_FUNC(entry_delete_cb), NULL);
+ gtk_signal_connect(GTK_OBJECT(gtktext), "button-press-event",
+ GTK_SIGNAL_FUNC(button_press_intercept_cb), NULL);
+}
+
+void gtkspell_detach(GtkText *gtktext) {
+ gtk_signal_disconnect_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(entry_insert_cb), NULL);
+ gtk_signal_disconnect_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(entry_delete_cb), NULL);
+ gtk_signal_disconnect_by_func(GTK_OBJECT(gtktext),
+ GTK_SIGNAL_FUNC(button_press_intercept_cb), NULL);
+
+ gtkspell_uncheck_all(gtktext);
+}
+
+static void sigchld(int param) {
+ if (gtkspell_running() &&
+ (waitpid(spell_pid, NULL, WNOHANG) == spell_pid)) {
+ spell_pid = 0;
+ } else {
+ /* a default SIGCHLD handler.
+ * what else to do here? */
+ waitpid(-1, NULL, WNOHANG);
+ }
+}
+
+static void set_up_signal() {
+ struct sigaction sigact;
+ memset(&sigact, 0, sizeof(struct sigaction));
+
+ sigact.sa_handler = sigchld;
+ sigaction(SIGCHLD, &sigact, NULL);
+}
projects / silc.git / blobdiff