[gspell/wip/current-word] inline-checker-text-buffer: don't check current word while typing

[Sébastien Wilmet <swilmet src gnome org>]

commit 54a814cca73435123a31de90324aaa39e85781f8
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Thu Feb 11 19:38:43 2016 +0100

    inline-checker-text-buffer: don't check current word while typing

 gspell/gspell-inline-checker-text-buffer.c |   52 ++++++++++++++++++++++++++++
 1 files changed, 52 insertions(+), 0 deletions(-)
---
diff --git a/gspell/gspell-inline-checker-text-buffer.c b/gspell/gspell-inline-checker-text-buffer.c
index 4b2996b..12a6f51 100644
--- a/gspell/gspell-inline-checker-text-buffer.c
+++ b/gspell/gspell-inline-checker-text-buffer.c
@@ -50,6 +50,11 @@ struct _GspellInlineCheckerTextBuffer
        GspellTextRegion *scan_region;
        guint timeout_id;
 
+       /* When a word is being typed, it should not be marked as misspelled,
+        * because it would be annoying.
+        */
+       guint check_current_word : 1;
+
        /* If the unit test mode is enabled, there is no timeouts, and the whole
         * buffer is scanned synchronously.
         * The unit test mode tries to follow as most as possible the same code
@@ -259,6 +264,46 @@ is_text_region_empty (GspellTextRegion *region)
 }
 
 static void
+subtract_current_word (GspellTextRegion *region)
+{
+       GtkTextBuffer *buffer;
+       GtkTextIter insert_iter;
+       GtkTextIter word_start;
+       GtkTextIter word_end;
+
+       buffer = _gspell_text_region_get_buffer (region);
+       if (buffer == NULL)
+       {
+               return;
+       }
+
+       if (gtk_text_buffer_get_has_selection (buffer))
+       {
+               return;
+       }
+
+       gtk_text_buffer_get_iter_at_mark (buffer,
+                                         &insert_iter,
+                                         gtk_text_buffer_get_insert (buffer));
+
+       word_start = insert_iter;
+       if (gtk_text_iter_ends_word (&word_start) ||
+           (gtk_text_iter_inside_word (&word_start) &&
+            !gtk_text_iter_starts_word (&word_start)))
+       {
+               gtk_text_iter_backward_word_start (&word_start);
+       }
+
+       word_end = insert_iter;
+       if (gtk_text_iter_inside_word (&word_end))
+       {
+               gtk_text_iter_forward_word_end (&word_end);
+       }
+
+       _gspell_text_region_subtract (region, &word_start, &word_end);
+}
+
+static void
 check_visible_region_in_view (GspellInlineCheckerTextBuffer *spell,
                              GtkTextView                   *view)
 {
@@ -291,6 +336,8 @@ check_visible_region_in_view (GspellInlineCheckerTextBuffer *spell,
                return;
        }
 
+       subtract_current_word (intersect);
+
        if (is_text_region_empty (intersect))
        {
                _gspell_text_region_destroy (intersect);
@@ -410,6 +457,7 @@ recheck_all (GspellInlineCheckerTextBuffer *spell)
 
        gtk_text_buffer_get_bounds (spell->buffer, &start, &end);
 
+       spell->check_current_word = TRUE;
        add_subregion_to_scan (spell, &start, &end);
        check_visible_region (spell);
 }
@@ -441,6 +489,7 @@ insert_text_after_cb (GtkTextBuffer                 *buffer,
                gtk_text_iter_forward_word_end (&end);
        }
 
+       spell->check_current_word = FALSE;
        add_subregion_to_scan (spell, &start, &end);
        install_timeout (spell, TIMEOUT_DURATION_BUFFER_MODIFIED);
 }
@@ -472,6 +521,7 @@ delete_range_after_cb (GtkTextBuffer                 *buffer,
                gtk_text_iter_forward_word_end (&end_adjusted);
        }
 
+       spell->check_current_word = FALSE;
        add_subregion_to_scan (spell, &start_adjusted, &end_adjusted);
        install_timeout (spell, TIMEOUT_DURATION_BUFFER_MODIFIED);
 }
@@ -1159,6 +1209,7 @@ _gspell_inline_checker_text_buffer_class_init (GspellInlineCheckerTextBufferClas
 static void
 _gspell_inline_checker_text_buffer_init (GspellInlineCheckerTextBuffer *spell)
 {
+       spell->check_current_word = TRUE;
 }
 
 GspellInlineCheckerTextBuffer *
@@ -1222,6 +1273,7 @@ _gspell_inline_checker_text_buffer_attach_view (GspellInlineCheckerTextBuffer *s
 
        spell->views = g_slist_prepend (spell->views, view);
 
+       spell->check_current_word = TRUE;
        check_visible_region_in_view (spell, view);
 }