From 7ae1c032031cde96d276c7f3b785e5ce5d0fb6fb Mon Sep 17 00:00:00 2001 From: Miles Bader Date: Wed, 25 Oct 2000 05:18:10 +0000 Subject: [PATCH] (find_field): Set the field stickiness correctly from overlay fields. Use renamed `text_property_stickiness'. (text_property_stickiness): Renamed from `char_property_stickiness'. --- src/ChangeLog | 9 +++++++++ src/editfns.c | 53 ++++++++++++++++++++++++++++++++++++++++++++------- 2 files changed, 55 insertions(+), 7 deletions(-) diff --git a/src/ChangeLog b/src/ChangeLog index cc5cfd86b1c..4255dfc59e0 100644 --- a/src/ChangeLog +++ b/src/ChangeLog @@ -1,3 +1,12 @@ +2000-10-25 Miles Bader + + * editfns.c (find_field): Set the field stickiness correctly from + overlay fields. Use renamed `text_property_stickiness'. + (text_property_stickiness): Renamed from `char_property_stickiness'. + * textprop.c (get_char_property_and_overlay): New function. + (Fget_char_property): Use it. + * intervals.h (get_char_property_and_overlay): Add declaration. + 2000-10-25 Stefan Monnier * keymap.c: Use AREF, ASET and ASIZE macros. diff --git a/src/editfns.c b/src/editfns.c index 57dbdaae0cc..dcc64455b3c 100644 --- a/src/editfns.c +++ b/src/editfns.c @@ -330,13 +330,13 @@ char_property_eq (prop, pos1, pos2) return EQ (pval1, pval2); } -/* Return the direction from which the char-property PROP would be +/* Return the direction from which the text-property PROP would be inherited by any new text inserted at POS: 1 if it would be inherited from the char after POS, -1 if it would be inherited from the char before POS, and 0 if from neither. */ static int -char_property_stickiness (prop, pos) +text_property_stickiness (prop, pos) Lisp_Object prop; Lisp_Object pos; { @@ -348,7 +348,7 @@ char_property_stickiness (prop, pos) Lisp_Object prev_pos, rear_non_sticky; prev_pos = make_number (XINT (pos) - 1); - rear_non_sticky = Fget_char_property (prev_pos, Qrear_nonsticky, Qnil); + rear_non_sticky = Fget_text_property (prev_pos, Qrear_nonsticky, Qnil); if (EQ (rear_non_sticky, Qnil) || (CONSP (rear_non_sticky) @@ -359,7 +359,7 @@ char_property_stickiness (prop, pos) } /* Consider following character. */ - front_sticky = Fget_char_property (pos, Qfront_sticky, Qnil); + front_sticky = Fget_text_property (pos, Qfront_sticky, Qnil); if (EQ (front_sticky, Qt) || (CONSP (front_sticky) @@ -397,6 +397,9 @@ find_field (pos, merge_at_boundary, beg, end) { /* Fields right before and after the point. */ Lisp_Object before_field, after_field; + /* If the fields came from overlays, the associated overlays. + Qnil means they came from text-properties. */ + Lisp_Object before_overlay = Qnil, after_overlay = Qnil; /* 1 if POS counts as the start of a field. */ int at_field_start = 0; /* 1 if POS counts as the end of a field. */ @@ -408,10 +411,12 @@ find_field (pos, merge_at_boundary, beg, end) CHECK_NUMBER_COERCE_MARKER (pos, 0); after_field - = Fget_char_property (pos, Qfield, Qnil); + = get_char_property_and_overlay (pos, Qfield, Qnil, &after_overlay); before_field = (XFASTINT (pos) > BEGV - ? Fget_char_property (make_number (XINT (pos) - 1), Qfield, Qnil) + ? get_char_property_and_overlay (make_number (XINT (pos) - 1), + Qfield, Qnil, + &before_overlay) : Qnil); /* See if we need to handle the case where MERGE_AT_BOUNDARY is nil @@ -424,7 +429,41 @@ find_field (pos, merge_at_boundary, beg, end) /* We are at a boundary, see which direction is inclusive. We decide by seeing which field the `field' property sticks to. */ { - int stickiness = char_property_stickiness (Qfield, pos); + /* -1 means insertions go into before_field, 1 means they go + into after_field, 0 means neither. */ + int stickiness; + /* Whether the before/after_field come from overlays. */ + int bop = !NILP (before_overlay); + int aop = !NILP (after_overlay); + + if (bop && XMARKER (OVERLAY_END (before_overlay))->insertion_type == 1) + /* before_field is from an overlay, which expands upon + end-insertions. Note that it's possible for after_overlay to + also eat insertions here, but then they will overlap, and + there's not much we can do. */ + stickiness = -1; + else if (aop && XMARKER(OVERLAY_END(after_overlay))->insertion_type == 0) + /* after_field is from an overlay, which expand to contain + start-insertions. */ + stickiness = 1; + else if (bop && aop) + /* Both fields come from overlays, but neither will contain any + insertion here. */ + stickiness = 0; + else if (bop) + /* before_field is an overlay that won't eat any insertion, but + after_field is from a text-property. Assume that the + text-property continues underneath the overlay, and so will + be inherited by any insertion, regardless of any stickiness + settings. */ + stickiness = 1; + else if (aop) + /* Similarly, when after_field is the overlay. */ + stickiness = -1; + else + /* Both fields come from text-properties. Look for explicit + stickiness properties. */ + stickiness = text_property_stickiness (Qfield, pos); if (stickiness > 0) at_field_start = 1; -- 2.39.2