[gtksourceview/wip/chergert/vim] work on word movements

[Christian Hergert <chergert src gnome org>]

commit 2c521121c57a49196a76dec54ab594e3d9dd3052
Author: Christian Hergert <chergert redhat com>
Date:   Sat Oct 23 13:05:39 2021 -0700

    work on word movements
    
    still wrong for b/B but getting closer

 gtksourceview/vim/gtk-source-vim-motion.c | 79 ++++++++++++++++++++-----------
 1 file changed, 52 insertions(+), 27 deletions(-)
---
diff --git a/gtksourceview/vim/gtk-source-vim-motion.c b/gtksourceview/vim/gtk-source-vim-motion.c
index ab5a33ce..072b5271 100644
--- a/gtksourceview/vim/gtk-source-vim-motion.c
+++ b/gtksourceview/vim/gtk-source-vim-motion.c
@@ -63,7 +63,8 @@ enum
 };
 
 static int
-classify_word (gunichar ch)
+classify_word (gunichar           ch,
+               const GtkTextIter *iter)
 {
        switch (ch)
        {
@@ -90,16 +91,40 @@ classify_word (gunichar ch)
 }
 
 static int
-classify_WORD (gunichar ch)
+classify_word_newline_stop (gunichar           ch,
+                            const GtkTextIter *iter)
+{
+       if (gtk_text_iter_starts_line (iter) &&
+           gtk_text_iter_ends_line (iter))
+               return CLASS_NEWLINE;
+
+       return classify_word (ch, iter);
+}
+
+static int
+classify_WORD (gunichar           ch,
+               const GtkTextIter *iter)
 {
        if (g_unichar_isspace (ch))
                return CLASS_SPACE;
+
        return CLASS_WORD;
 }
 
+static int
+classify_WORD_newline_stop (gunichar           ch,
+                            const GtkTextIter *iter)
+{
+       if (gtk_text_iter_starts_line (iter) &&
+           gtk_text_iter_ends_line (iter))
+               return CLASS_NEWLINE;
+
+       return classify_WORD (ch, iter);
+}
+
 static gboolean
 forward_classified_start (GtkTextIter  *iter,
-                          gint        (*classify) (gunichar))
+                          int         (*classify) (gunichar, const GtkTextIter *))
 {
        gint begin_class;
        gint cur_class;
@@ -108,7 +133,7 @@ forward_classified_start (GtkTextIter  *iter,
        g_assert (iter);
 
        ch = gtk_text_iter_get_char (iter);
-       begin_class = classify (ch);
+       begin_class = classify (ch, iter);
 
        /* Move to the first non-whitespace character if necessary. */
        if (begin_class == CLASS_SPACE)
@@ -119,7 +144,7 @@ forward_classified_start (GtkTextIter  *iter,
                                return FALSE;
 
                        ch = gtk_text_iter_get_char (iter);
-                       cur_class = classify (ch);
+                       cur_class = classify (ch, iter);
                        if (cur_class != CLASS_SPACE)
                                return TRUE;
                }
@@ -129,7 +154,7 @@ forward_classified_start (GtkTextIter  *iter,
        while (gtk_text_iter_forward_char (iter))
        {
                ch = gtk_text_iter_get_char (iter);
-               cur_class = classify (ch);
+               cur_class = classify (ch, iter);
 
                if (cur_class == CLASS_SPACE)
                {
@@ -146,7 +171,7 @@ forward_classified_start (GtkTextIter  *iter,
 
 static gboolean
 forward_classified_end (GtkTextIter  *iter,
-                        gint        (*classify) (gunichar))
+                        int         (*classify) (gunichar, const GtkTextIter *))
 {
        gunichar ch;
        gint begin_class;
@@ -159,12 +184,12 @@ forward_classified_end (GtkTextIter  *iter,
 
        /* If we are on space, walk to the start of the next word. */
        ch = gtk_text_iter_get_char (iter);
-       if (classify (ch) == CLASS_SPACE)
+       if (classify (ch, iter) == CLASS_SPACE)
                if (!forward_classified_start (iter, classify))
                        return FALSE;
 
        ch = gtk_text_iter_get_char (iter);
-       begin_class = classify (ch);
+       begin_class = classify (ch, iter);
 
        if (begin_class == CLASS_NEWLINE)
        {
@@ -178,7 +203,7 @@ forward_classified_end (GtkTextIter  *iter,
                        return FALSE;
 
                ch = gtk_text_iter_get_char (iter);
-               cur_class = classify (ch);
+               cur_class = classify (ch, iter);
 
                if (cur_class != begin_class || cur_class == CLASS_NEWLINE)
                {
@@ -192,7 +217,7 @@ forward_classified_end (GtkTextIter  *iter,
 
 static gboolean
 backward_classified_end (GtkTextIter  *iter,
-                         gint        (*classify) (gunichar))
+                         int         (*classify) (gunichar, const GtkTextIter *))
 {
        gunichar ch;
        gint begin_class;
@@ -201,7 +226,7 @@ backward_classified_end (GtkTextIter  *iter,
        g_assert (iter);
 
        ch = gtk_text_iter_get_char (iter);
-       begin_class = classify (ch);
+       begin_class = classify (ch, iter);
 
        if (begin_class == CLASS_NEWLINE)
        {
@@ -215,7 +240,7 @@ backward_classified_end (GtkTextIter  *iter,
                        return FALSE;
 
                ch = gtk_text_iter_get_char (iter);
-               cur_class = classify (ch);
+               cur_class = classify (ch, iter);
 
                if (cur_class == CLASS_NEWLINE)
                {
@@ -236,7 +261,7 @@ backward_classified_end (GtkTextIter  *iter,
 
 static gboolean
 backward_classified_start (GtkTextIter  *iter,
-                           gint        (*classify) (gunichar))
+                           int         (*classify) (gunichar, const GtkTextIter *))
 {
        gunichar ch;
        gint begin_class;
@@ -249,12 +274,12 @@ backward_classified_start (GtkTextIter  *iter,
 
        /* If we are on space, walk to the end of the previous word. */
        ch = gtk_text_iter_get_char (iter);
-       if (classify (ch) == CLASS_SPACE)
+       if (classify (ch, iter) == CLASS_SPACE)
                if (!backward_classified_end (iter, classify))
                        return FALSE;
 
        ch = gtk_text_iter_get_char (iter);
-       begin_class = classify (ch);
+       begin_class = classify (ch, iter);
        if (begin_class == CLASS_NEWLINE)
        {
                gtk_text_iter_forward_char (iter);
@@ -267,7 +292,7 @@ backward_classified_start (GtkTextIter  *iter,
                        return FALSE;
 
                ch = gtk_text_iter_get_char (iter);
-               cur_class = classify (ch);
+               cur_class = classify (ch, iter);
 
                if (cur_class != begin_class || cur_class == CLASS_NEWLINE)
                {
@@ -522,56 +547,56 @@ static gboolean
 motion_forward_word_start (GtkTextIter   *iter,
                            GtkSourceView *view)
 {
-       return forward_classified_start (iter, classify_word);
+       return forward_classified_start (iter, classify_word_newline_stop);
 }
 
 static gboolean
 motion_forward_WORD_start (GtkTextIter   *iter,
                            GtkSourceView *view)
 {
-       return forward_classified_start (iter, classify_WORD);
+       return forward_classified_start (iter, classify_WORD_newline_stop);
 }
 
 static gboolean
 motion_forward_word_end (GtkTextIter   *iter,
                          GtkSourceView *view)
 {
-       return forward_classified_end (iter, classify_word);
+       return forward_classified_end (iter, classify_word_newline_stop);
 }
 
 static gboolean
 motion_forward_WORD_end (GtkTextIter   *iter,
                          GtkSourceView *view)
 {
-       return forward_classified_end (iter, classify_WORD);
+       return forward_classified_end (iter, classify_WORD_newline_stop);
 }
 
 static gboolean
 motion_backward_word_start (GtkTextIter   *iter,
-                          GtkSourceView *view)
+                            GtkSourceView *view)
 {
-       return backward_classified_start (iter, classify_word);
+       return backward_classified_start (iter, classify_word_newline_stop);
 }
 
 static gboolean
 motion_backward_WORD_start (GtkTextIter   *iter,
-                          GtkSourceView *view)
+                            GtkSourceView *view)
 {
-       return backward_classified_start (iter, classify_WORD);
+       return backward_classified_start (iter, classify_WORD_newline_stop);
 }
 
 static gboolean
 motion_backward_word_end (GtkTextIter   *iter,
                           GtkSourceView *view)
 {
-       return backward_classified_end (iter, classify_word);
+       return backward_classified_end (iter, classify_word_newline_stop);
 }
 
 static gboolean
 motion_backward_WORD_end (GtkTextIter   *iter,
                           GtkSourceView *view)
 {
-       return backward_classified_end (iter, classify_WORD);
+       return backward_classified_end (iter, classify_WORD_newline_stop);
 }
 
 static gboolean