core: fix input of wide UTF-8 chars under Cygwin (bug #34061)

1 files changed, 117 insertions, 130 deletions

diff --git a/src/gui/curses/gui-curses-key.c b/src/gui/curses/gui-curses-key.c
index 9a96275b0..7c21b1f7f 100644
--- a/src/gui/curses/gui-curses-key.c
+++ b/src/gui/curses/gui-curses-key.c
@@ -287,7 +287,10 @@ void
 gui_key_flush ()
 {
     int i, key, insert_ok;
-    char key_str[32], *key_utf, *input_old;
+    static char key_str[64] = { '\0' };
+    static int length_key_str = 0;
+    char key_temp[2], *key_utf, *input_old, *ptr_char, *next_char, *ptr_error;
+    char utf_partial_char[16];
     
     /*
      * if there's no paste pending, then we use buffer and do actions
@@ -301,164 +304,148 @@ gui_key_flush ()
         for (i = 0; i < gui_key_buffer_size; i++)
         {
             key = gui_key_buffer[i];
-            
             insert_ok = 1;
+            utf_partial_char[0] = '\0';
             
-            if (gui_mouse_event_pending)
-            {
-                insert_ok = 0;
-                key_str[0] = (char) key;
-                key_str[1] = '\0';
-            }
-            else if (key < 32)
+            if (gui_mouse_event_pending || (key < 32) || (key == 127))
             {
-                insert_ok = 0;
-                key_str[0] = '\x01';
-                key_str[1] = (char) key + '@';
-                key_str[2] = '\0';
-            }
-            else if (key == 127)
-            {
-                key_str[0] = '\x01';
-                key_str[1] = '?';
-                key_str[2] = '\0';
+                if (gui_mouse_event_pending)
+                {
+                    insert_ok = 0;
+                    key_str[0] = (char)key;
+                    key_str[1] = '\0';
+                    length_key_str = 1;
+                }
+                else if (key < 32)
+                {
+                    insert_ok = 0;
+                    key_str[0] = '\x01';
+                    key_str[1] = (char)key + '@';
+                    key_str[2] = '\0';
+                    length_key_str = 2;
+                }
+                else if (key == 127)
+                {
+                    key_str[0] = '\x01';
+                    key_str[1] = '?';
+                    key_str[2] = '\0';
+                    length_key_str = 2;
+                }
             }
             else
             {
                 if (local_utf8)
                 {
-                    /* 1 char: 0vvvvvvv */
-                    if (key < 0x80)
-                    {
-                        key_str[0] = (char) key;
-                        key_str[1] = '\0';
-                    }
-                    /* 2 chars: 110vvvvv 10vvvvvv */
-                    else if ((key & 0xE0) == 0xC0)
-                    {
-                        key_str[0] = (char) key;
-                        if (i < gui_key_buffer_size - 1)
-                        {
-                            key_str[1] = (char) (gui_key_buffer[++i]);
-                            key_str[2] = '\0';
-                        }
-                        else
-                            key_str[1] = '\0';
-                    }
-                    /* 3 chars: 1110vvvv 10vvvvvv 10vvvvvv */
-                    else if ((key & 0xF0) == 0xE0)
+                    key_str[length_key_str] = (char)key;
+                    key_str[length_key_str + 1] = '\0';
+                    length_key_str++;
+                    
+                    /*
+                     * replace invalid chars by "?", but NOT last char of
+                     * string, if it is incomplete UTF-8 char (another char
+                     * will be added to the string on next iteration)
+                     */
+                    ptr_char = key_str;
+                    while (ptr_char && ptr_char[0])
                     {
-                        key_str[0] = (char) key;
-                        if (i < gui_key_buffer_size - 1)
+                        (void) utf8_is_valid (ptr_char, &ptr_error);
+                        if (!ptr_error)
+                            break;
+                        next_char = utf8_next_char (ptr_error);
+                        if (next_char && next_char[0])
                         {
-                            key_str[1] = (char) (gui_key_buffer[++i]);
-                            if (i < gui_key_buffer_size - 1)
+                            ptr_char = ptr_error;
+                            while (ptr_char < next_char)
                             {
-                                key_str[2] = (char) (gui_key_buffer[++i]);
-                                key_str[3] = '\0';
+                                ptr_char[0] = '?';
+                                ptr_char++;
                             }
-                            else
-                                key_str[2] = '\0';
                         }
                         else
-                            key_str[1] = '\0';
-                    }
-                    /* 4 chars: 11110vvv 10vvvvvv 10vvvvvv 10vvvvvv */
-                    else if ((key & 0xF8) == 0xF0)
-                    {
-                        key_str[0] = (char) key;
-                        if (i < gui_key_buffer_size - 1)
                         {
-                            key_str[1] = (char) (gui_key_buffer[++i]);
-                            if (i < gui_key_buffer_size - 1)
-                            {
-                                key_str[2] = (char) (gui_key_buffer[++i]);
-                                if (i < gui_key_buffer_size - 1)
-                                {
-                                    key_str[3] = (char) (gui_key_buffer[++i]);
-                                    key_str[4] = '\0';
-                                }
-                                else
-                                    key_str[3] = '\0';
-                            }
-                            else
-                                key_str[2] = '\0';
+                            strcpy (utf_partial_char, ptr_char);
+                            ptr_char[0] = '\0';
+                            break;
                         }
-                        else
-                            key_str[1] = '\0';
+                        ptr_char = next_char;
                     }
                 }
                 else
                 {
-                    key_str[0] = (char) key;
-                    key_str[1] = '\0';
-                    
-                    /* convert input to UTF-8 is user is not using UTF-8 as locale */
-                    if (!local_utf8)
-                    {
-                        key_utf = string_iconv_to_internal (NULL, key_str);
-                        strncpy (key_str, key_utf, sizeof (key_str));
-                        key_str[sizeof (key_str) - 1] = '\0';
-                    }
+                    /* convert input to UTF-8 */
+                    key_temp[0] = (char) key;
+                    key_temp[1] = '\0';
+                    key_utf = string_iconv_to_internal (NULL, key_temp);
+                    strcat (key_str, key_utf);
                 }
             }
-            
-            hook_signal_send ("key_pressed",
-                              WEECHAT_HOOK_SIGNAL_STRING, key_str);
-            
-            if (gui_current_window->buffer->text_search != GUI_TEXT_SEARCH_DISABLED)
-                input_old = (gui_current_window->buffer->input_buffer) ?
-                    strdup (gui_current_window->buffer->input_buffer) : strdup ("");
-            else
-                input_old = NULL;
-            
-            if ((gui_key_pressed (key_str) != 0) && (insert_ok)
-                && (!gui_cursor_mode))
-            {
-                gui_buffer_undo_snap (gui_current_window->buffer);
-                gui_input_insert_string (gui_current_window->buffer,
-                                         key_str, -1);
-                if (gui_current_window->buffer->completion)
-                    gui_completion_stop (gui_current_window->buffer->completion, 0);
-                gui_input_text_changed_modifier_and_signal (gui_current_window->buffer, 1);
-            }
-            
-            /* incremental text search in buffer */
-            if ((gui_current_window->buffer->text_search != GUI_TEXT_SEARCH_DISABLED)
-                && ((input_old == NULL)
-                    || (gui_current_window->buffer->input_buffer == NULL)
-                    || (strcmp (input_old, gui_current_window->buffer->input_buffer) != 0)))
+
+            if (key_str[0])
             {
-                /*
-                 * if current input is longer than old input, and that
-                 * beginning of current input is exactly equal to old input,
-                 * then do nothing (search will not find any result and can
-                 * take some time on buffer with many lines..)
-                 */
-                if (!gui_current_window->buffer->text_search_found
-                    && (input_old != NULL)
-                    && (input_old[0])
-                    && (gui_current_window->buffer->input_buffer != NULL)
-                    && (gui_current_window->buffer->input_buffer[0])
-                    && (strlen (gui_current_window->buffer->input_buffer) > strlen (input_old))
-                    && (strncmp (gui_current_window->buffer->input_buffer, input_old,
-                                 strlen (input_old)) == 0))
+                hook_signal_send ("key_pressed",
+                                  WEECHAT_HOOK_SIGNAL_STRING, key_str);
+                
+                if (gui_current_window->buffer->text_search != GUI_TEXT_SEARCH_DISABLED)
+                    input_old = (gui_current_window->buffer->input_buffer) ?
+                        strdup (gui_current_window->buffer->input_buffer) : strdup ("");
+                else
+                    input_old = NULL;
+                
+                if ((gui_key_pressed (key_str) != 0) && (insert_ok)
+                    && (!gui_cursor_mode))
                 {
-                    /*
-                     * do not search text in buffer, just alert about text not
-                     * found
-                     */
-                    if (CONFIG_BOOLEAN(config_look_search_text_not_found_alert))
-                        printf ("\a");
+                    gui_buffer_undo_snap (gui_current_window->buffer);
+                    gui_input_insert_string (gui_current_window->buffer,
+                                             key_str, -1);
+                    if (gui_current_window->buffer->completion)
+                        gui_completion_stop (gui_current_window->buffer->completion, 0);
+                    gui_input_text_changed_modifier_and_signal (gui_current_window->buffer, 1);
                 }
-                else
+                
+                /* incremental text search in buffer */
+                if ((gui_current_window->buffer->text_search != GUI_TEXT_SEARCH_DISABLED)
+                    && ((input_old == NULL)
+                        || (gui_current_window->buffer->input_buffer == NULL)
+                        || (strcmp (input_old, gui_current_window->buffer->input_buffer) != 0)))
                 {
-                    gui_window_search_restart (gui_current_window);
+                    /*
+                     * if current input is longer than old input, and that
+                     * beginning of current input is exactly equal to old input,
+                     * then do nothing (search will not find any result and can
+                     * take some time on buffer with many lines..)
+                     */
+                    if (!gui_current_window->buffer->text_search_found
+                        && (input_old != NULL)
+                        && (input_old[0])
+                        && (gui_current_window->buffer->input_buffer != NULL)
+                        && (gui_current_window->buffer->input_buffer[0])
+                        && (strlen (gui_current_window->buffer->input_buffer) > strlen (input_old))
+                        && (strncmp (gui_current_window->buffer->input_buffer, input_old,
+                                     strlen (input_old)) == 0))
+                    {
+                        /*
+                         * do not search text in buffer, just alert about text not
+                         * found
+                         */
+                        if (CONFIG_BOOLEAN(config_look_search_text_not_found_alert))
+                            printf ("\a");
+                    }
+                    else
+                    {
+                        gui_window_search_restart (gui_current_window);
+                    }
                 }
+                
+                if (input_old)
+                    free (input_old);
             }
             
-            if (input_old)
-                free (input_old);
+            /* prepare incomplete UTF-8 char for next iteration */
+            if (utf_partial_char[0])
+                strcpy (key_str, utf_partial_char);
+            else
+                key_str[0] = '\0';
+            length_key_str = strlen (key_str);
         }
         
         gui_key_buffer_reset ();