/* Display generation from window structure and buffer text.
Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995,
1997, 1998, 1999, 2000, 2001, 2002, 2003,
- 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
+ 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
This file is part of GNU Emacs.
static int face_before_or_after_it_pos P_ ((struct it *, int));
static int next_overlay_change P_ ((int));
static int handle_single_display_spec P_ ((struct it *, Lisp_Object,
- Lisp_Object, struct text_pos *,
- int));
+ Lisp_Object, Lisp_Object,
+ struct text_pos *, int));
static int underlying_face_id P_ ((struct it *));
static int in_ellipses_for_invisible_text_p P_ ((struct display_pos *,
struct window *));
if (it->method == GET_FROM_DISPLAY_VECTOR)
handle_overlay_change_p = 0;
- /* Handle overlay changes. */
+ /* Handle overlay changes.
+ This sets HANDLED to HANDLED_RECOMPUTE_PROPS
+ if it finds overlays. */
if (handle_overlay_change_p)
handled = handle_overlay_change (it);
-
- /* Determine where to stop next. */
- if (handled == HANDLED_NORMALLY)
- compute_stop_pos (it);
}
}
while (handled == HANDLED_RECOMPUTE_PROPS);
+
+ /* Determine where to stop next. */
+ if (handled == HANDLED_NORMALLY)
+ compute_stop_pos (it);
}
else
{
int base_face_id, bufpos;
+ int i;
+ Lisp_Object from_overlay
+ = (it->current.overlay_string_index >= 0
+ ? it->string_overlays[it->current.overlay_string_index]
+ : Qnil);
+
+ /* See if we got to this string directly or indirectly from
+ an overlay property. That includes the before-string or
+ after-string of an overlay, strings in display properties
+ provided by an overlay, their text properties, etc.
+
+ FROM_OVERLAY is the overlay that brought us here, or nil if none. */
+ if (! NILP (from_overlay))
+ for (i = it->sp - 1; i >= 0; i--)
+ {
+ if (it->stack[i].current.overlay_string_index >= 0)
+ from_overlay
+ = it->string_overlays[it->stack[i].current.overlay_string_index];
+ else if (! NILP (it->stack[i].from_overlay))
+ from_overlay = it->stack[i].from_overlay;
- if (it->current.overlay_string_index >= 0)
- bufpos = IT_CHARPOS (*it);
+ if (!NILP (from_overlay))
+ break;
+ }
+
+ if (! NILP (from_overlay))
+ {
+ bufpos = IT_CHARPOS (*it);
+ /* For a string from an overlay, the base face depends
+ only on text properties and ignores overlays. */
+ base_face_id
+ = face_for_overlay_string (it->w,
+ IT_CHARPOS (*it),
+ it->region_beg_charpos,
+ it->region_end_charpos,
+ &next_stop,
+ (IT_CHARPOS (*it)
+ + TEXT_PROP_DISTANCE_LIMIT),
+ 0,
+ from_overlay);
+ }
else
- bufpos = 0;
+ {
+ bufpos = 0;
- /* For strings from a buffer, i.e. overlay strings or strings
- from a `display' property, use the face at IT's current
- buffer position as the base face to merge with, so that
- overlay strings appear in the same face as surrounding
- text, unless they specify their own faces. */
- base_face_id = underlying_face_id (it);
+ /* For strings from a `display' property, use the face at
+ IT's current buffer position as the base face to merge
+ with, so that overlay strings appear in the same face as
+ surrounding text, unless they specify their own
+ faces. */
+ base_face_id = underlying_face_id (it);
+ }
new_face_id = face_at_string_position (it->w,
it->string,
handle_display_prop (it)
struct it *it;
{
- Lisp_Object prop, object;
+ Lisp_Object prop, object, overlay;
struct text_pos *position;
/* Nonzero if some property replaces the display of the text itself. */
int display_replaced_p = 0;
if (!it->string_from_display_prop_p)
it->area = TEXT_AREA;
- prop = Fget_char_property (make_number (position->charpos),
- Qdisplay, object);
+ prop = get_char_property_and_overlay (make_number (position->charpos),
+ Qdisplay, object, &overlay);
if (NILP (prop))
return HANDLED_NORMALLY;
+ /* Now OVERLAY is the overlay that gave us this property, or nil
+ if it was a text property. */
if (!STRINGP (it->string))
object = it->w->buffer;
{
for (; CONSP (prop); prop = XCDR (prop))
{
- if (handle_single_display_spec (it, XCAR (prop), object,
+ if (handle_single_display_spec (it, XCAR (prop), object, overlay,
position, display_replaced_p))
- display_replaced_p = 1;
+ {
+ display_replaced_p = 1;
+ /* If some text in a string is replaced, `position' no
+ longer points to the position of `object'. */
+ if (STRINGP (object))
+ break;
+ }
}
}
else if (VECTORP (prop))
{
int i;
for (i = 0; i < ASIZE (prop); ++i)
- if (handle_single_display_spec (it, AREF (prop, i), object,
+ if (handle_single_display_spec (it, AREF (prop, i), object, overlay,
position, display_replaced_p))
- display_replaced_p = 1;
+ {
+ display_replaced_p = 1;
+ /* If some text in a string is replaced, `position' no
+ longer points to the position of `object'. */
+ if (STRINGP (object))
+ break;
+ }
}
else
{
- int ret = handle_single_display_spec (it, prop, object, position, 0);
+ int ret = handle_single_display_spec (it, prop, object, overlay,
+ position, 0);
if (ret < 0) /* Replaced by "", i.e. nothing. */
return HANDLED_RECOMPUTE_PROPS;
if (ret)
replaced text display with something else, for example an image;
we ignore such properties after the first one has been processed.
+ OVERLAY is the overlay this `display' property came from,
+ or nil if it was a text property.
+
If PROP is a `space' or `image' specification, and in some other
cases too, set *POSITION to the position where the `display'
property ends.
"something" is "nothing". */
static int
-handle_single_display_spec (it, spec, object, position,
+handle_single_display_spec (it, spec, object, overlay, position,
display_replaced_before_p)
struct it *it;
Lisp_Object spec;
Lisp_Object object;
+ Lisp_Object overlay;
struct text_pos *position;
int display_replaced_before_p;
{
return 0;
}
- /* Handle `(space_width WIDTH)'. */
+ /* Handle `(space-width WIDTH)'. */
if (CONSP (spec)
&& EQ (XCAR (spec), Qspace_width)
&& CONSP (XCDR (spec)))
it->position = start_pos;
it->object = NILP (object) ? it->w->buffer : object;
it->method = GET_FROM_IMAGE;
+ it->from_overlay = Qnil;
it->face_id = face_id;
/* Say that we haven't consumed the characters with
it->position = *position;
push_it (it);
it->position = save_pos;
+ it->from_overlay = overlay;
if (NILP (location))
it->area = TEXT_AREA;
/* Say that we haven't consumed the characters with
`display' property yet. The call to pop_it in
set_iterator_to_next will clean this up. */
- *position = start_pos;
+ if (BUFFERP (object))
+ it->current.pos = start_pos;
}
else if (CONSP (value) && EQ (XCAR (value), Qspace))
{
it->method = GET_FROM_STRETCH;
it->object = value;
- *position = it->position = start_pos;
+ it->position = start_pos;
+ if (BUFFERP (object))
+ it->current.pos = start_pos;
}
#ifdef HAVE_WINDOW_SYSTEM
else
/* Say that we haven't consumed the characters with
`display' property yet. The call to pop_it in
set_iterator_to_next will clean this up. */
- *position = start_pos;
+ if (BUFFERP (object))
+ it->current.pos = start_pos;
}
#endif /* HAVE_WINDOW_SYSTEM */
i = 0;
j = it->current.overlay_string_index;
while (i < OVERLAY_STRING_CHUNK_SIZE && j < n)
- it->overlay_strings[i++] = entries[j++].string;
+ {
+ it->overlay_strings[i] = entries[j].string;
+ it->string_overlays[i++] = entries[j++].overlay;
+ }
CHECK_IT (it);
}
string. */
IT_STRING_CHARPOS (*it) = IT_STRING_BYTEPOS (*it) = 0;
it->string = it->overlay_strings[0];
+ it->from_overlay = Qnil;
it->stop_charpos = 0;
xassert (STRINGP (it->string));
it->end_charpos = SCHARS (it->string);
p->face_id = it->face_id;
p->string = it->string;
p->method = it->method;
+ p->from_overlay = it->from_overlay;
switch (p->method)
{
case GET_FROM_IMAGE:
it->current = p->current;
it->position = p->position;
it->string = p->string;
+ it->from_overlay = p->from_overlay;
if (NILP (it->string))
SET_TEXT_POS (it->current.string_pos, -1, -1);
it->method = p->method;
if (!FRAME_VISIBLE_P (f) || !f->glyphs_initialized_p)
return 0;
-/* The terminal frame is used as the first Emacs frame on the Mac OS. */
-#ifndef MAC_OS8
#ifdef HAVE_WINDOW_SYSTEM
/* When Emacs starts, selected_frame may be the initial terminal
frame. If we let this through, a message would be displayed on
if (FRAME_INITIAL_P (XFRAME (selected_frame)))
return 0;
#endif /* HAVE_WINDOW_SYSTEM */
-#endif
/* Redraw garbaged frames. */
if (frame_garbaged)
buffer = w->buffer;
CHECK_BUFFER (buffer);
- if (NILP (format))
+ /* Make formatting the modeline a non-op when noninteractive, otherwise
+ there will be problems later caused by a partially initialized frame. */
+ if (NILP (format) || noninteractive)
return empty_unibyte_string;
if (no_props)
{
XRectangle cr, result;
struct glyph *cursor_glyph;
+ struct glyph_row *row;
+
+ if (w->phys_cursor.vpos >= 0
+ && w->phys_cursor.vpos < w->current_matrix->nrows
+ && (row = MATRIX_ROW (w->current_matrix, w->phys_cursor.vpos),
+ row->enabled_p)
+ && row->cursor_in_fringe_p)
+ {
+ /* Cursor is in the fringe. */
+ cr.x = window_box_right_offset (w,
+ (WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (w)
+ ? RIGHT_MARGIN_AREA
+ : TEXT_AREA));
+ cr.y = row->y;
+ cr.width = WINDOW_RIGHT_FRINGE_WIDTH (w);
+ cr.height = row->height;
+ return x_intersect_rectangles (&cr, r, &result);
+ }
cursor_glyph = get_phys_cursor_glyph (w);
if (cursor_glyph)
DEFVAR_INT ("scroll-conservatively", &scroll_conservatively,
doc: /* *Scroll up to this many lines, to bring point back on screen.
-A value of zero means to scroll the text to center point vertically
-in the window. */);
+If point moves off-screen, redisplay will scroll by up to
+`scroll-conservatively' lines in order to bring point just barely
+onto the screen again. If that cannot be done, then redisplay
+recenters point as usual.
+
+A value of zero means always recenter point if it moves off screen. */);
scroll_conservatively = 0;
DEFVAR_INT ("scroll-margin", &scroll_margin,
HCoop / bpt / emacs.git / blobdiff