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[gnu-emacs] / src / composite.c

diff --git a/src/composite.c b/src/composite.c
index 16fa3cce6842154976b5e53cb9521128c9ef6af8..6c603fab3fc6aa41c2fbc0368827ae3cf22865f7 100644 (file)
--- a/src/composite.c
+++ b/src/composite.c
@@ -26,7 +26,6 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #define COMPOSITE_INLINE EXTERN_INLINE
 
-#include <setjmp.h>
 #include "lisp.h"
 #include "character.h"
 #include "buffer.h"
@@ -428,7 +427,7 @@ get_composition_id (ptrdiff_t charpos, ptrdiff_t bytepos, ptrdiff_t nchars,
 
    This doesn't check the validity of composition.  */
 
-int
+bool
 find_composition (ptrdiff_t pos, ptrdiff_t limit,
                  ptrdiff_t *start, ptrdiff_t *end,
                  Lisp_Object *prop, Lisp_Object object)
@@ -709,7 +708,7 @@ static Lisp_Object fill_gstring_header (Lisp_Object, Lisp_Object,
                                         Lisp_Object, Lisp_Object,
                                         Lisp_Object);
 
-int
+bool
 composition_gstring_p (Lisp_Object gstring)
 {
   Lisp_Object header;
@@ -909,7 +908,7 @@ static Lisp_Object
 autocmp_chars (Lisp_Object rule, ptrdiff_t charpos, ptrdiff_t bytepos, ptrdiff_t limit, struct window *win, struct face *face, Lisp_Object string)
 {
   ptrdiff_t count = SPECPDL_INDEX ();
-  FRAME_PTR f = XFRAME (WGET (win, frame));
+  FRAME_PTR f = XFRAME (win->frame);
   Lisp_Object pos = make_number (charpos);
   ptrdiff_t to;
   ptrdiff_t pt = PT, pt_byte = PT_BYTE;
@@ -945,7 +944,7 @@ autocmp_chars (Lisp_Object rule, ptrdiff_t charpos, ptrdiff_t bytepos, ptrdiff_t
     }
   else
 #endif /* not HAVE_WINDOW_SYSTEM */
-    font_object = WGET (win, frame);
+    font_object = win->frame;
   lgstring = Fcomposition_get_gstring (pos, make_number (to), font_object,
                                       string);
   if (NILP (LGSTRING_ID (lgstring)))
@@ -1212,15 +1211,14 @@ composition_compute_stop_pos (struct composition_it *cmp_it, ptrdiff_t charpos,
    string.  In that case, FACE must not be NULL.
 
    If the character is composed, setup members of CMP_IT (id, nglyphs,
-   from, to, reversed_p), and return 1.  Otherwise, update
-   CMP_IT->stop_pos, and return 0.  */
+   from, to, reversed_p), and return true.  Otherwise, update
+   CMP_IT->stop_pos, and return false.  */
 
-int
-composition_reseat_it (struct composition_it *cmp_it, ptrdiff_t charpos, ptrdiff_t bytepos, ptrdiff_t endpos, struct window *w, struct face *face, Lisp_Object string)
+bool
+composition_reseat_it (struct composition_it *cmp_it, ptrdiff_t charpos,
+                      ptrdiff_t bytepos, ptrdiff_t endpos, struct window *w,
+                      struct face *face, Lisp_Object string)
 {
-  if (endpos < 0)
-    endpos = NILP (string) ? BEGV : 0;
-
   if (cmp_it->ch == -2)
     {
       composition_compute_stop_pos (cmp_it, charpos, bytepos, endpos, string);
@@ -1229,6 +1227,9 @@ composition_reseat_it (struct composition_it *cmp_it, ptrdiff_t charpos, ptrdiff
        return 0;
     }
 
+  if (endpos < 0)
+    endpos = NILP (string) ? BEGV : 0;
+
   if (cmp_it->ch < 0)
     {
       /* We are looking at a static composition.  */
@@ -1276,36 +1277,23 @@ composition_reseat_it (struct composition_it *cmp_it, ptrdiff_t charpos, ptrdiff
        {
          ptrdiff_t cpos = charpos, bpos = bytepos;
 
-         while (1)
+         cmp_it->reversed_p = 1;
+         elt = XCAR (val);
+         if (cmp_it->lookback > 0)
            {
-             elt = XCAR (val);
-             if (cmp_it->lookback > 0)
-               {
-                 cpos = charpos - cmp_it->lookback;
-                 if (STRINGP (string))
-                   bpos = string_char_to_byte (string, cpos);
-                 else
-                   bpos = CHAR_TO_BYTE (cpos);
-               }
-             lgstring = autocmp_chars (elt, cpos, bpos, charpos + 1, w, face,
-                                       string);
-             if (composition_gstring_p (lgstring)
-                 && cpos + LGSTRING_CHAR_LEN (lgstring) - 1 == charpos)
-               break;
-             /* Composition failed or didn't cover the current
-                character.  */
-             if (cmp_it->lookback == 0)
-               goto no_composition;
-             lgstring = Qnil;
-             /* Try to find a shorter composition that starts after CPOS.  */
-             composition_compute_stop_pos (cmp_it, charpos, bytepos, cpos,
-                                           string);
-             if (cmp_it->ch == -2 || cmp_it->stop_pos < charpos)
-               goto no_composition;
-             val = CHAR_TABLE_REF (Vcomposition_function_table, cmp_it->ch);
-             for (i = 0; i < cmp_it->rule_idx; i++, val = XCDR (val));
+             cpos = charpos - cmp_it->lookback;
+             if (STRINGP (string))
+               bpos = string_char_to_byte (string, cpos);
+             else
+               bpos = CHAR_TO_BYTE (cpos);
            }
-         cmp_it->reversed_p = 1;
+         lgstring = autocmp_chars (elt, cpos, bpos, charpos + 1, w, face,
+                                   string);
+         if (! composition_gstring_p (lgstring)
+             || cpos + LGSTRING_CHAR_LEN (lgstring) - 1 != charpos)
+           /* Composition failed or didn't cover the current
+              character.  */
+           goto no_composition;
        }
       if (NILP (lgstring))
        goto no_composition;
@@ -1340,6 +1328,8 @@ composition_reseat_it (struct composition_it *cmp_it, ptrdiff_t charpos, ptrdiff
       /* BYTEPOS is calculated in composition_compute_stop_pos */
       bytepos = -1;
     }
+  if (cmp_it->reversed_p)
+    endpos = -1;
   composition_compute_stop_pos (cmp_it, charpos, bytepos, endpos, string);
   return 0;
 }
@@ -1482,10 +1472,10 @@ struct position_record
 /* This is like find_composition, but find an automatic composition
    instead.  It is assured that POS is not within a static
    composition.  If found, set *GSTRING to the glyph-string
-   representing the composition, and return 1.  Otherwise, *GSTRING to
-   Qnil, and return 0.  */
+   representing the composition, and return true.  Otherwise, *GSTRING to
+   Qnil, and return false.  */
 
-static int
+static bool
 find_automatic_composition (ptrdiff_t pos, ptrdiff_t limit,
                            ptrdiff_t *start, ptrdiff_t *end,
                            Lisp_Object *gstring, Lisp_Object string)
@@ -1498,7 +1488,7 @@ find_automatic_composition (ptrdiff_t pos, ptrdiff_t limit,
   int c;
   Lisp_Object window;
   struct window *w;
-  int need_adjustment = 0;
+  bool need_adjustment = 0;
 
   window = Fget_buffer_window (Fcurrent_buffer (), Qnil);
   if (NILP (window))