struct font_name;
struct table_entry;
+struct named_merge_point;
static void map_tty_color P_ ((struct frame *, struct face *,
enum lface_attribute_index, int *));
static int face_numeric_swidth P_ ((Lisp_Object));
static int face_fontset P_ ((Lisp_Object *));
static char *choose_face_font P_ ((struct frame *, Lisp_Object *, int, int, int*));
-static void merge_face_vectors P_ ((struct frame *, Lisp_Object *, Lisp_Object*, Lisp_Object));
-static void merge_face_inheritance P_ ((struct frame *f, Lisp_Object,
- Lisp_Object *, Lisp_Object));
-static void merge_face_vector_with_property P_ ((struct frame *, Lisp_Object *,
- Lisp_Object));
+static void merge_face_vectors P_ ((struct frame *, Lisp_Object *, Lisp_Object*,
+ struct named_merge_point *));
+static int merge_face_ref P_ ((struct frame *, Lisp_Object, Lisp_Object *,
+ int, struct named_merge_point *));
static int set_lface_from_font_name P_ ((struct frame *, Lisp_Object,
Lisp_Object, int, int));
static Lisp_Object lface_from_face_name P_ ((struct frame *, Lisp_Object, int));
Scolor_supported_p, 1, 3, 0,
doc: /* Return non-nil if COLOR can be displayed on FRAME.
BACKGROUND-P non-nil means COLOR is used as a background.
+Otherwise, this function tells whether it can be used as a foreground.
If FRAME is nil or omitted, use the selected frame.
COLOR must be a valid color name. */)
(color, frame, background_p)
#endif /* GLYPH_DEBUG == 0 */
+\f
+/* Face-merge cycle checking. */
+
+/* A `named merge point' is simply a point during face-merging where we
+ look up a face by name. We keep a stack of which named lookups we're
+ currently processing so that we can easily detect cycles, using a
+ linked- list of struct named_merge_point structures, typically
+ allocated on the stack frame of the named lookup functions which are
+ active (so no consing is required). */
+struct named_merge_point
+{
+ Lisp_Object face_name;
+ struct named_merge_point *prev;
+};
+
+
+/* If a face merging cycle is detected for FACE_NAME, return 0,
+ otherwise add NEW_NAMED_MERGE_POINT, which is initialized using
+ FACE_NAME, as the head of the linked list pointed to by
+ NAMED_MERGE_POINTS, and return 1. */
+
+static INLINE int
+push_named_merge_point (struct named_merge_point *new_named_merge_point,
+ Lisp_Object face_name,
+ struct named_merge_point **named_merge_points)
+{
+ struct named_merge_point *prev;
+
+ for (prev = *named_merge_points; prev; prev = prev->prev)
+ if (EQ (face_name, prev->face_name))
+ return 0;
+
+ new_named_merge_point->face_name = face_name;
+ new_named_merge_point->prev = *named_merge_points;
+
+ *named_merge_points = new_named_merge_point;
+
+ return 1;
+}
+
+\f
+
+
/* Resolve face name FACE_NAME. If FACE_NAME is a string, intern it
to make it a symvol. If FACE_NAME is an alias for another face,
return that face's name. */
else if (FLOATP (to))
/* relative X relative => relative */
result = make_float (XFLOAT_DATA (from) * XFLOAT_DATA (to));
+ else if (UNSPECIFIEDP (to))
+ result = from;
}
else if (FUNCTIONP (from))
/* FROM is a function, which use to adjust TO. */
completely specified and contain only absolute attributes. Every
specified attribute of FROM overrides the corresponding attribute of
TO; relative attributes in FROM are merged with the absolute value in
- TO and replace it. CYCLE_CHECK is used internally to detect loops in
- face inheritance; it should be Qnil when called from other places. */
+ TO and replace it. NAMED_MERGE_POINTS is used internally to detect
+ loops in face inheritance; it should be 0 when called from other
+ places. */
static INLINE void
-merge_face_vectors (f, from, to, cycle_check)
+merge_face_vectors (f, from, to, named_merge_points)
struct frame *f;
Lisp_Object *from, *to;
- Lisp_Object cycle_check;
+ struct named_merge_point *named_merge_points;
{
int i;
other code uses `unspecified' as a generic value for face attributes. */
if (!UNSPECIFIEDP (from[LFACE_INHERIT_INDEX])
&& !NILP (from[LFACE_INHERIT_INDEX]))
- merge_face_inheritance (f, from[LFACE_INHERIT_INDEX], to, cycle_check);
+ merge_face_ref (f, from[LFACE_INHERIT_INDEX], to, 0, named_merge_points);
/* If TO specifies a :font attribute, and FROM specifies some
font-related attribute, we need to clear TO's :font attribute
if (!UNSPECIFIEDP (from[i]))
{
if (i == LFACE_HEIGHT_INDEX && !INTEGERP (from[i]))
- to[i] = merge_face_heights (from[i], to[i], to[i], cycle_check);
+ to[i] = merge_face_heights (from[i], to[i], to[i],
+ named_merge_points);
else
to[i] = from[i];
}
to[LFACE_INHERIT_INDEX] = Qnil;
}
-/* Merge face attributes from the face on frame F whose name is
- INHERITS, into the vector of face attributes TO; INHERITS may also be
- a list of face names, in which case they are applied in order.
- CYCLE_CHECK is used to detect loops in face inheritance.
- Returns true if any of the inherited attributes are `font-related'. */
+/* Merge the named face FACE_NAME on frame F, into the vector of face
+ attributes TO. NAMED_MERGE_POINTS is used to detect loops in face
+ inheritance. Returns true if FACE_NAME is a valid face name and
+ merging succeeded. */
-static void
-merge_face_inheritance (f, inherit, to, cycle_check)
+static int
+merge_named_face (f, face_name, to, named_merge_points)
struct frame *f;
- Lisp_Object inherit;
+ Lisp_Object face_name;
Lisp_Object *to;
- Lisp_Object cycle_check;
+ struct named_merge_point *named_merge_points;
{
- if (SYMBOLP (inherit) && !EQ (inherit, Qunspecified))
- /* Inherit from the named face INHERIT. */
- {
- Lisp_Object lface;
-
- /* Make sure we're not in an inheritance loop. */
- cycle_check = CYCLE_CHECK (cycle_check, inherit, 15);
- if (NILP (cycle_check))
- /* Cycle detected, ignore any further inheritance. */
- return;
+ struct named_merge_point named_merge_point;
- lface = lface_from_face_name (f, inherit, 0);
- if (!NILP (lface))
- merge_face_vectors (f, XVECTOR (lface)->contents, to, cycle_check);
- }
- else if (CONSP (inherit))
- /* Handle a list of inherited faces by calling ourselves recursively
- on each element. Note that we only do so for symbol elements, so
- it's not possible to infinitely recurse. */
+ if (push_named_merge_point (&named_merge_point,
+ face_name, &named_merge_points))
{
- while (CONSP (inherit))
- {
- if (SYMBOLP (XCAR (inherit)))
- merge_face_inheritance (f, XCAR (inherit), to, cycle_check);
+ Lisp_Object from[LFACE_VECTOR_SIZE];
+ int ok = get_lface_attributes (f, face_name, from, 0);
- /* Check for a circular inheritance list. */
- cycle_check = CYCLE_CHECK (cycle_check, inherit, 15);
- if (NILP (cycle_check))
- /* Cycle detected. */
- break;
+ if (ok)
+ merge_face_vectors (f, from, to, named_merge_points);
- inherit = XCDR (inherit);
- }
+ return ok;
}
+ else
+ return 0;
}
-/* Given a Lisp face attribute vector TO and a Lisp object PROP that
- is a face property, determine the resulting face attributes on
- frame F, and store them in TO. PROP may be a single face
- specification or a list of such specifications. Each face
- specification can be
+/* Merge face attributes from the lisp `face reference' FACE_REF on
+ frame F into the face attribute vector TO. If ERR_MSGS is non-zero,
+ problems with FACE_REF cause an error message to be shown. Return
+ non-zero if no errors occurred (regardless of the value of ERR_MSGS).
+ NAMED_MERGE_POINTS is used to detect loops in face inheritance or
+ list structure; it may be 0 for most callers.
+
+ FACE_REF may be a single face specification or a list of such
+ specifications. Each face specification can be:
1. A symbol or string naming a Lisp face.
Face specifications earlier in lists take precedence over later
specifications. */
-static void
-merge_face_vector_with_property (f, to, prop)
+static int
+merge_face_ref (f, face_ref, to, err_msgs, named_merge_points)
struct frame *f;
+ Lisp_Object face_ref;
Lisp_Object *to;
- Lisp_Object prop;
+ int err_msgs;
+ struct named_merge_point *named_merge_points;
{
- if (CONSP (prop))
+ int ok = 1; /* Succeed without an error? */
+
+ if (CONSP (face_ref))
{
- Lisp_Object first = XCAR (prop);
+ Lisp_Object first = XCAR (face_ref);
if (EQ (first, Qforeground_color)
|| EQ (first, Qbackground_color))
{
/* One of (FOREGROUND-COLOR . COLOR) or (BACKGROUND-COLOR
. COLOR). COLOR must be a string. */
- Lisp_Object color_name = XCDR (prop);
+ Lisp_Object color_name = XCDR (face_ref);
Lisp_Object color = first;
if (STRINGP (color_name))
to[LFACE_BACKGROUND_INDEX] = color_name;
}
else
- add_to_log ("Invalid face color", color_name, Qnil);
+ {
+ if (err_msgs)
+ add_to_log ("Invalid face color", color_name, Qnil);
+ ok = 0;
+ }
}
else if (SYMBOLP (first)
&& *SDATA (SYMBOL_NAME (first)) == ':')
{
/* Assume this is the property list form. */
- while (CONSP (prop) && CONSP (XCDR (prop)))
+ while (CONSP (face_ref) && CONSP (XCDR (face_ref)))
{
- Lisp_Object keyword = XCAR (prop);
- Lisp_Object value = XCAR (XCDR (prop));
-
- if (EQ (keyword, QCfamily))
+ Lisp_Object keyword = XCAR (face_ref);
+ Lisp_Object value = XCAR (XCDR (face_ref));
+ int err = 0;
+
+ /* Specifying `unspecified' is a no-op. */
+ if (EQ (value, Qunspecified))
+ ;
+ else if (EQ (keyword, QCfamily))
{
if (STRINGP (value))
to[LFACE_FAMILY_INDEX] = value;
else
- add_to_log ("Invalid face font family", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCheight))
{
merge_face_heights (value, to[LFACE_HEIGHT_INDEX],
Qnil, Qnil);
- if (NILP (new_height))
- add_to_log ("Invalid face font height", value, Qnil);
- else
+ if (! NILP (new_height))
to[LFACE_HEIGHT_INDEX] = new_height;
+ else
+ err = 1;
}
else if (EQ (keyword, QCweight))
{
&& face_numeric_weight (value) >= 0)
to[LFACE_WEIGHT_INDEX] = value;
else
- add_to_log ("Invalid face weight", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCslant))
{
&& face_numeric_slant (value) >= 0)
to[LFACE_SLANT_INDEX] = value;
else
- add_to_log ("Invalid face slant", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCunderline))
{
|| STRINGP (value))
to[LFACE_UNDERLINE_INDEX] = value;
else
- add_to_log ("Invalid face underline", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCoverline))
{
|| STRINGP (value))
to[LFACE_OVERLINE_INDEX] = value;
else
- add_to_log ("Invalid face overline", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCstrike_through))
{
|| STRINGP (value))
to[LFACE_STRIKE_THROUGH_INDEX] = value;
else
- add_to_log ("Invalid face strike-through", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCbox))
{
|| NILP (value))
to[LFACE_BOX_INDEX] = value;
else
- add_to_log ("Invalid face box", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCinverse_video)
|| EQ (keyword, QCreverse_video))
if (EQ (value, Qt) || NILP (value))
to[LFACE_INVERSE_INDEX] = value;
else
- add_to_log ("Invalid face inverse-video", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCforeground))
{
if (STRINGP (value))
to[LFACE_FOREGROUND_INDEX] = value;
else
- add_to_log ("Invalid face foreground", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCbackground))
{
if (STRINGP (value))
to[LFACE_BACKGROUND_INDEX] = value;
else
- add_to_log ("Invalid face background", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCstipple))
{
if (!NILP (pixmap_p))
to[LFACE_STIPPLE_INDEX] = value;
else
- add_to_log ("Invalid face stipple", value, Qnil);
+ err = 1;
#endif
}
else if (EQ (keyword, QCwidth))
&& face_numeric_swidth (value) >= 0)
to[LFACE_SWIDTH_INDEX] = value;
else
- add_to_log ("Invalid face width", value, Qnil);
+ err = 1;
}
else if (EQ (keyword, QCinherit))
{
- if (SYMBOLP (value))
- to[LFACE_INHERIT_INDEX] = value;
- else
- {
- Lisp_Object tail;
- for (tail = value; CONSP (tail); tail = XCDR (tail))
- if (!SYMBOLP (XCAR (tail)))
- break;
- if (NILP (tail))
- to[LFACE_INHERIT_INDEX] = value;
- else
- add_to_log ("Invalid face inherit", value, Qnil);
- }
+ /* This is not really very useful; it's just like a
+ normal face reference. */
+ if (! merge_face_ref (f, value, to,
+ err_msgs, named_merge_points))
+ err = 1;
}
else
- add_to_log ("Invalid attribute %s in face property",
- keyword, Qnil);
+ err = 1;
+
+ if (err)
+ {
+ add_to_log ("Invalid face attribute %S %S", keyword, value);
+ ok = 0;
+ }
- prop = XCDR (XCDR (prop));
+ face_ref = XCDR (XCDR (face_ref));
}
}
else
{
- /* This is a list of face specs. Specifications at the
- beginning of the list take precedence over later
- specifications, so we have to merge starting with the
- last specification. */
- Lisp_Object next = XCDR (prop);
- if (!NILP (next))
- merge_face_vector_with_property (f, to, next);
- merge_face_vector_with_property (f, to, first);
+ /* This is a list of face refs. Those at the beginning of the
+ list take precedence over what follows, so we have to merge
+ from the end backwards. */
+ Lisp_Object next = XCDR (face_ref);
+
+ if (! NILP (next))
+ ok = merge_face_ref (f, next, to, err_msgs, named_merge_points);
+
+ if (! merge_face_ref (f, first, to, err_msgs, named_merge_points))
+ ok = 0;
}
}
else
{
- /* PROP ought to be a face name. */
- Lisp_Object lface = lface_from_face_name (f, prop, 0);
- if (NILP (lface))
- add_to_log ("Invalid face text property value: %s", prop, Qnil);
- else
- merge_face_vectors (f, XVECTOR (lface)->contents, to, Qnil);
+ /* FACE_REF ought to be a face name. */
+ ok = merge_named_face (f, face_ref, to, named_merge_points);
+ if (!ok && err_msgs)
+ add_to_log ("Invalid face reference: %s", face_ref, Qnil);
}
+
+ return ok;
}
DEFUN ("internal-copy-lisp-face", Finternal_copy_lisp_face,
Sinternal_copy_lisp_face, 4, 4, 0,
doc: /* Copy face FROM to TO.
-If FRAME it t, copy the global face definition of FROM to the
-global face definition of TO. Otherwise, copy the frame-local
-definition of FROM on FRAME to the frame-local definition of TO
-on NEW-FRAME, or FRAME if NEW-FRAME is nil.
+If FRAME is t, copy the global face definition of FROM.
+Otherwise, copy the frame-local definition of FROM on FRAME.
+If NEW-FRAME is a frame, copy that data into the frame-local
+definition of TO on NEW-FRAME. If NEW-FRAME is nil.
+FRAME controls where the data is copied to.
-Value is TO. */)
+The value is TO. */)
(from, to, frame, new_frame)
Lisp_Object from, to, frame, new_frame;
{
CHECK_SYMBOL (from);
CHECK_SYMBOL (to);
- if (NILP (new_frame))
- new_frame = frame;
if (EQ (frame, Qt))
{
else
{
/* Copy frame-local definition of FROM. */
+ if (NILP (new_frame))
+ new_frame = frame;
CHECK_LIVE_FRAME (frame);
CHECK_LIVE_FRAME (new_frame);
lface = lface_from_face_name (XFRAME (frame), from, 1);
doc: /* Return face attribute KEYWORD of face SYMBOL.
If SYMBOL does not name a valid Lisp face or KEYWORD isn't a valid
face attribute name, signal an error.
-If the optional argument FRAME is given, report on face FACE in that
-frame. If FRAME is t, report on the defaults for face FACE (for new
+If the optional argument FRAME is given, report on face SYMBOL in that
+frame. If FRAME is t, report on the defaults for face SYMBOL (for new
frames). If FRAME is omitted or nil, use the selected frame. */)
(symbol, keyword, frame)
Lisp_Object symbol, keyword, frame;
}
-/* Compare face vectors V1 and V2 for equality. Value is non-zero if
+/* Compare face-attribute values v1 and v2 for equality. Value is non-zero if
all attributes are `equal'. Tries to be fast because this function
is called quite often. */
static INLINE int
-lface_equal_p (v1, v2)
- Lisp_Object *v1, *v2;
+face_attr_equal_p (v1, v2)
+ Lisp_Object v1, v2;
{
- int i, equal_p = 1;
+ /* Type can differ, e.g. when one attribute is unspecified, i.e. nil,
+ and the other is specified. */
+ if (XTYPE (v1) != XTYPE (v2))
+ return 0;
- for (i = 1; i < LFACE_VECTOR_SIZE && equal_p; ++i)
- {
- Lisp_Object a = v1[i];
- Lisp_Object b = v2[i];
+ if (EQ (v1, v2))
+ return 1;
- /* Type can differ, e.g. when one attribute is unspecified, i.e. nil,
- and the other is specified. */
- equal_p = XTYPE (a) == XTYPE (b);
- if (!equal_p)
- break;
+ switch (XTYPE (v1))
+ {
+ case Lisp_String:
+ if (SBYTES (v1) != SBYTES (v2))
+ return 0;
- if (!EQ (a, b))
- {
- switch (XTYPE (a))
- {
- case Lisp_String:
- equal_p = ((SBYTES (a)
- == SBYTES (b))
- && bcmp (SDATA (a), SDATA (b),
- SBYTES (a)) == 0);
- break;
+ return bcmp (SDATA (v1), SDATA (v2), SBYTES (v1)) == 0;
- case Lisp_Int:
- case Lisp_Symbol:
- equal_p = 0;
- break;
+ case Lisp_Int:
+ case Lisp_Symbol:
+ return 0;
- default:
- equal_p = !NILP (Fequal (a, b));
- break;
- }
- }
+ default:
+ return !NILP (Fequal (v1, v2));
}
+}
+
+
+/* Compare face vectors V1 and V2 for equality. Value is non-zero if
+ all attributes are `equal'. Tries to be fast because this function
+ is called quite often. */
+
+static INLINE int
+lface_equal_p (v1, v2)
+ Lisp_Object *v1, *v2;
+{
+ int i, equal_p = 1;
+
+ for (i = 1; i < LFACE_VECTOR_SIZE && equal_p; ++i)
+ equal_p = face_attr_equal_p (v1[i], v2[i]);
return equal_p;
}
}
\f
-/***********************************************************************
- Face capability testing for ttys
- ***********************************************************************/
-
-
-/* If the distance (as returned by color_distance) between two colors is
- less than this, then they are considered the same, for determining
- whether a color is supported or not. The range of values is 0-65535. */
-
-#define TTY_SAME_COLOR_THRESHOLD 10000
-
-
-DEFUN ("tty-supports-face-attributes-p",
- Ftty_supports_face_attributes_p, Stty_supports_face_attributes_p,
- 1, 2, 0,
- doc: /* Return non-nil if all the face attributes in ATTRIBUTES are supported.
-The optional argument FRAME is the frame on which to test; if it is nil
-or unspecified, then the current frame is used. If FRAME is not a tty
-frame, then nil is returned.
-
-The definition of `supported' is somewhat heuristic, but basically means
-that a face containing all the attributes in ATTRIBUTES, when merged
-with the default face for display, can be represented in a way that's
-
- \(1) different in appearance than the default face, and
- \(2) `close in spirit' to what the attributes specify, if not exact.
-
-Point (2) implies that a `:weight black' attribute will be satisified
-by any terminal that can display bold, and a `:foreground "yellow"' as
-long as the terminal can display a yellowish color, but `:slant italic'
-will _not_ be satisified by the tty display code's automatic
-substitution of a `dim' face for italic. */)
- (attributes, frame)
- Lisp_Object attributes, frame;
-{
- int weight, i;
- struct frame *f;
- Lisp_Object val, fg, bg;
- XColor fg_tty_color, fg_std_color;
- XColor bg_tty_color, bg_std_color;
- Lisp_Object attrs[LFACE_VECTOR_SIZE];
- unsigned test_caps = 0;
-
- if (NILP (frame))
- frame = selected_frame;
- CHECK_LIVE_FRAME (frame);
- f = XFRAME (frame);
-
- for (i = 0; i < LFACE_VECTOR_SIZE; i++)
- attrs[i] = Qunspecified;
- merge_face_vector_with_property (f, attrs, attributes);
-
- /* This function only works on ttys. */
- if (!FRAME_TERMCAP_P (f) && !FRAME_MSDOS_P (f))
- return Qnil;
-
- /* First check some easy-to-check stuff; ttys support none of the
- following attributes, so we can just return nil if any are requested. */
-
- /* stipple */
- val = attrs[LFACE_STIPPLE_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val))
- return Qnil;
-
- /* font height */
- val = attrs[LFACE_HEIGHT_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val))
- return Qnil;
-
- /* font width */
- val = attrs[LFACE_SWIDTH_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val)
- && face_numeric_swidth (val) != XLFD_SWIDTH_MEDIUM)
- return Qnil;
-
- /* overline */
- val = attrs[LFACE_OVERLINE_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val))
- return Qnil;
-
- /* strike-through */
- val = attrs[LFACE_STRIKE_THROUGH_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val))
- return Qnil;
-
- /* boxes */
- val = attrs[LFACE_BOX_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val))
- return Qnil;
-
- /* slant (italics/oblique); We consider any non-default value
- unsupportable on ttys, even though the face code actually `fakes'
- them using a dim attribute if possible. This is because the faked
- result is too different from what the face specifies. */
- val = attrs[LFACE_SLANT_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val)
- && face_numeric_slant (val) != XLFD_SLANT_ROMAN)
- return Qnil;
-
-
- /* Test for terminal `capabilities' (non-color character attributes). */
-
- /* font weight (bold/dim) */
- weight = face_numeric_weight (attrs[LFACE_WEIGHT_INDEX]);
- if (weight >= 0)
- {
- if (weight > XLFD_WEIGHT_MEDIUM)
- test_caps = TTY_CAP_BOLD;
- else if (weight < XLFD_WEIGHT_MEDIUM)
- test_caps = TTY_CAP_DIM;
- }
-
- /* underlining */
- val = attrs[LFACE_UNDERLINE_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val))
- {
- if (STRINGP (val))
- return Qnil; /* ttys don't support colored underlines */
- else
- test_caps |= TTY_CAP_UNDERLINE;
- }
-
- /* inverse video */
- val = attrs[LFACE_INVERSE_INDEX];
- if (!UNSPECIFIEDP (val) && !NILP (val))
- test_caps |= TTY_CAP_INVERSE;
-
-
- /* Color testing. */
-
- /* Default the color indices in FG_TTY_COLOR and BG_TTY_COLOR, since
- we use them when calling `tty_capable_p' below, even if the face
- specifies no colors. */
- fg_tty_color.pixel = FACE_TTY_DEFAULT_FG_COLOR;
- bg_tty_color.pixel = FACE_TTY_DEFAULT_BG_COLOR;
-
- /* Check if foreground color is close enough. */
- fg = attrs[LFACE_FOREGROUND_INDEX];
- if (STRINGP (fg))
- {
- if (! tty_lookup_color (f, fg, &fg_tty_color, &fg_std_color))
- return Qnil;
- else if (color_distance (&fg_tty_color, &fg_std_color)
- > TTY_SAME_COLOR_THRESHOLD)
- return Qnil;
- }
-
- /* Check if background color is close enough. */
- bg = attrs[LFACE_BACKGROUND_INDEX];
- if (STRINGP (bg))
- {
- if (! tty_lookup_color (f, bg, &bg_tty_color, &bg_std_color))
- return Qnil;
- else if (color_distance (&bg_tty_color, &bg_std_color)
- > TTY_SAME_COLOR_THRESHOLD)
- return Qnil;
- }
-
- /* If both foreground and background are requested, see if the
- distance between them is OK. We just check to see if the distance
- between the tty's foreground and background is close enough to the
- distance between the standard foreground and background. */
- if (STRINGP (fg) && STRINGP (bg))
- {
- int delta_delta
- = (color_distance (&fg_std_color, &bg_std_color)
- - color_distance (&fg_tty_color, &bg_tty_color));
- if (delta_delta > TTY_SAME_COLOR_THRESHOLD
- || delta_delta < -TTY_SAME_COLOR_THRESHOLD)
- return Qnil;
- }
-
-
- /* See if the capabilities we selected above are supported, with the
- given colors. */
- if (test_caps != 0 &&
- ! tty_capable_p (FRAME_TTY (f), test_caps, fg_tty_color.pixel, bg_tty_color.pixel))
- return Qnil;
-
-
- /* Hmmm, everything checks out, this terminal must support this face. */
- return Qt;
-}
-
-
-\f
/***********************************************************************
Face Cache
***********************************************************************/
}
-/* Free all realized faces in face cache C, including basic faces. C
- may be null. If faces are freed, make sure the frame's current
+/* Free all realized faces in face cache C, including basic faces.
+ C may be null. If faces are freed, make sure the frame's current
matrix is marked invalid, so that a display caused by an expose
event doesn't try to use faces we destroyed. */
get_lface_attributes (f, symbol, symbol_attrs, 1);
bcopy (default_face->lface, attrs, sizeof attrs);
- merge_face_vectors (f, symbol_attrs, attrs, Qnil);
+ merge_face_vectors (f, symbol_attrs, attrs, 0);
+
return lookup_face (f, attrs, c, NULL);
}
get_lface_attributes (f, symbol, symbol_attrs, 1);
bcopy (default_face->lface, attrs, sizeof attrs);
- merge_face_vectors (f, symbol_attrs, attrs, Qnil);
+ merge_face_vectors (f, symbol_attrs, attrs, 0);
return lookup_face (f, attrs, c, default_face);
}
Lisp_Object lface;
lface = Fmake_vector (make_number (LFACE_VECTOR_SIZE),
Qunspecified);
- merge_face_vector_with_property (XFRAME (selected_frame),
- XVECTOR (lface)->contents,
- plist);
+ merge_face_ref (XFRAME (selected_frame), plist, XVECTOR (lface)->contents,
+ 1, 0);
return lface;
}
\f
+/***********************************************************************
+ Face capability testing
+ ***********************************************************************/
+
+
+/* If the distance (as returned by color_distance) between two colors is
+ less than this, then they are considered the same, for determining
+ whether a color is supported or not. The range of values is 0-65535. */
+
+#define TTY_SAME_COLOR_THRESHOLD 10000
+
+#ifdef HAVE_WINDOW_SYSTEM
+
+/* Return non-zero if all the face attributes in ATTRS are supported
+ on the window-system frame F.
+
+ The definition of `supported' is somewhat heuristic, but basically means
+ that a face containing all the attributes in ATTRS, when merged with the
+ default face for display, can be represented in a way that's
+
+ \(1) different in appearance than the default face, and
+ \(2) `close in spirit' to what the attributes specify, if not exact. */
+
+static int
+x_supports_face_attributes_p (f, attrs, def_face)
+ struct frame *f;
+ Lisp_Object *attrs;
+ struct face *def_face;
+{
+ Lisp_Object *def_attrs = def_face->lface;
+
+ /* Check that other specified attributes are different that the default
+ face. */
+ if ((!UNSPECIFIEDP (attrs[LFACE_UNDERLINE_INDEX])
+ && face_attr_equal_p (attrs[LFACE_UNDERLINE_INDEX],
+ def_attrs[LFACE_UNDERLINE_INDEX]))
+ || (!UNSPECIFIEDP (attrs[LFACE_INVERSE_INDEX])
+ && face_attr_equal_p (attrs[LFACE_INVERSE_INDEX],
+ def_attrs[LFACE_INVERSE_INDEX]))
+ || (!UNSPECIFIEDP (attrs[LFACE_FOREGROUND_INDEX])
+ && face_attr_equal_p (attrs[LFACE_FOREGROUND_INDEX],
+ def_attrs[LFACE_FOREGROUND_INDEX]))
+ || (!UNSPECIFIEDP (attrs[LFACE_BACKGROUND_INDEX])
+ && face_attr_equal_p (attrs[LFACE_BACKGROUND_INDEX],
+ def_attrs[LFACE_BACKGROUND_INDEX]))
+ || (!UNSPECIFIEDP (attrs[LFACE_STIPPLE_INDEX])
+ && face_attr_equal_p (attrs[LFACE_STIPPLE_INDEX],
+ def_attrs[LFACE_STIPPLE_INDEX]))
+ || (!UNSPECIFIEDP (attrs[LFACE_OVERLINE_INDEX])
+ && face_attr_equal_p (attrs[LFACE_OVERLINE_INDEX],
+ def_attrs[LFACE_OVERLINE_INDEX]))
+ || (!UNSPECIFIEDP (attrs[LFACE_STRIKE_THROUGH_INDEX])
+ && face_attr_equal_p (attrs[LFACE_STRIKE_THROUGH_INDEX],
+ def_attrs[LFACE_STRIKE_THROUGH_INDEX]))
+ || (!UNSPECIFIEDP (attrs[LFACE_BOX_INDEX])
+ && face_attr_equal_p (attrs[LFACE_BOX_INDEX],
+ def_attrs[LFACE_BOX_INDEX])))
+ return 0;
+
+ /* Check font-related attributes, as those are the most commonly
+ "unsupported" on a window-system (because of missing fonts). */
+ if (!UNSPECIFIEDP (attrs[LFACE_FAMILY_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_HEIGHT_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_WEIGHT_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_SLANT_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_SWIDTH_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_AVGWIDTH_INDEX]))
+ {
+ struct face *face;
+ Lisp_Object merged_attrs[LFACE_VECTOR_SIZE];
+
+ bcopy (def_attrs, merged_attrs, sizeof merged_attrs);
+
+ merge_face_vectors (f, attrs, merged_attrs, 0);
+
+ face = FACE_FROM_ID (f, lookup_face (f, merged_attrs, 0, 0));
+
+ if (! face)
+ error ("cannot make face");
+
+ /* If the font is the same, then not supported. */
+ if (face->font == def_face->font)
+ return 0;
+ }
+
+ /* Everything checks out, this face is supported. */
+ return 1;
+}
+
+#endif /* HAVE_WINDOW_SYSTEM */
+
+/* Return non-zero if all the face attributes in ATTRS are supported
+ on the tty frame F.
+
+ The definition of `supported' is somewhat heuristic, but basically means
+ that a face containing all the attributes in ATTRS, when merged
+ with the default face for display, can be represented in a way that's
+
+ \(1) different in appearance than the default face, and
+ \(2) `close in spirit' to what the attributes specify, if not exact.
+
+ Point (2) implies that a `:weight black' attribute will be satisfied
+ by any terminal that can display bold, and a `:foreground "yellow"' as
+ long as the terminal can display a yellowish color, but `:slant italic'
+ will _not_ be satisfied by the tty display code's automatic
+ substitution of a `dim' face for italic. */
+
+static int
+tty_supports_face_attributes_p (f, attrs, def_face)
+ struct frame *f;
+ Lisp_Object *attrs;
+ struct face *def_face;
+{
+ int weight;
+ Lisp_Object val, fg, bg;
+ XColor fg_tty_color, fg_std_color;
+ XColor bg_tty_color, bg_std_color;
+ unsigned test_caps = 0;
+ Lisp_Object *def_attrs = def_face->lface;
+
+
+ /* First check some easy-to-check stuff; ttys support none of the
+ following attributes, so we can just return false if any are requested
+ (even if `nominal' values are specified, we should still return false,
+ as that will be the same value that the default face uses). We
+ consider :slant unsupportable on ttys, even though the face code
+ actually `fakes' them using a dim attribute if possible. This is
+ because the faked result is too different from what the face
+ specifies. */
+ if (!UNSPECIFIEDP (attrs[LFACE_FAMILY_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_STIPPLE_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_HEIGHT_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_SWIDTH_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_OVERLINE_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_STRIKE_THROUGH_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_BOX_INDEX])
+ || !UNSPECIFIEDP (attrs[LFACE_SLANT_INDEX]))
+ return 0;
+
+
+ /* Test for terminal `capabilities' (non-color character attributes). */
+
+ /* font weight (bold/dim) */
+ weight = face_numeric_weight (attrs[LFACE_WEIGHT_INDEX]);
+ if (weight >= 0)
+ {
+ int def_weight = face_numeric_weight (def_attrs[LFACE_WEIGHT_INDEX]);
+
+ if (weight > XLFD_WEIGHT_MEDIUM)
+ {
+ if (def_weight > XLFD_WEIGHT_MEDIUM)
+ return 0; /* same as default */
+ test_caps = TTY_CAP_BOLD;
+ }
+ else if (weight < XLFD_WEIGHT_MEDIUM)
+ {
+ if (def_weight < XLFD_WEIGHT_MEDIUM)
+ return 0; /* same as default */
+ test_caps = TTY_CAP_DIM;
+ }
+ else if (def_weight == XLFD_WEIGHT_MEDIUM)
+ return 0; /* same as default */
+ }
+
+ /* underlining */
+ val = attrs[LFACE_UNDERLINE_INDEX];
+ if (!UNSPECIFIEDP (val))
+ {
+ if (STRINGP (val))
+ return 0; /* ttys can't use colored underlines */
+ else if (face_attr_equal_p (val, def_attrs[LFACE_UNDERLINE_INDEX]))
+ return 0; /* same as default */
+ else
+ test_caps |= TTY_CAP_UNDERLINE;
+ }
+
+ /* inverse video */
+ val = attrs[LFACE_INVERSE_INDEX];
+ if (!UNSPECIFIEDP (val))
+ {
+ if (face_attr_equal_p (val, def_attrs[LFACE_UNDERLINE_INDEX]))
+ return 0; /* same as default */
+ else
+ test_caps |= TTY_CAP_INVERSE;
+ }
+
+
+ /* Color testing. */
+
+ /* Default the color indices in FG_TTY_COLOR and BG_TTY_COLOR, since
+ we use them when calling `tty_capable_p' below, even if the face
+ specifies no colors. */
+ fg_tty_color.pixel = FACE_TTY_DEFAULT_FG_COLOR;
+ bg_tty_color.pixel = FACE_TTY_DEFAULT_BG_COLOR;
+
+ /* Check if foreground color is close enough. */
+ fg = attrs[LFACE_FOREGROUND_INDEX];
+ if (STRINGP (fg))
+ {
+ Lisp_Object def_fg = def_attrs[LFACE_FOREGROUND_INDEX];
+
+ if (face_attr_equal_p (fg, def_fg))
+ return 0; /* same as default */
+ else if (! tty_lookup_color (f, fg, &fg_tty_color, &fg_std_color))
+ return 0; /* not a valid color */
+ else if (color_distance (&fg_tty_color, &fg_std_color)
+ > TTY_SAME_COLOR_THRESHOLD)
+ return 0; /* displayed color is too different */
+ else
+ /* Make sure the color is really different than the default. */
+ {
+ XColor def_fg_color;
+ if (tty_lookup_color (f, def_fg, &def_fg_color, 0)
+ && (color_distance (&fg_tty_color, &def_fg_color)
+ <= TTY_SAME_COLOR_THRESHOLD))
+ return 0;
+ }
+ }
+
+ /* Check if background color is close enough. */
+ bg = attrs[LFACE_BACKGROUND_INDEX];
+ if (STRINGP (bg))
+ {
+ Lisp_Object def_bg = def_attrs[LFACE_FOREGROUND_INDEX];
+
+ if (face_attr_equal_p (bg, def_bg))
+ return 0; /* same as default */
+ else if (! tty_lookup_color (f, bg, &bg_tty_color, &bg_std_color))
+ return 0; /* not a valid color */
+ else if (color_distance (&bg_tty_color, &bg_std_color)
+ > TTY_SAME_COLOR_THRESHOLD)
+ return 0; /* displayed color is too different */
+ else
+ /* Make sure the color is really different than the default. */
+ {
+ XColor def_bg_color;
+ if (tty_lookup_color (f, def_bg, &def_bg_color, 0)
+ && (color_distance (&bg_tty_color, &def_bg_color)
+ <= TTY_SAME_COLOR_THRESHOLD))
+ return 0;
+ }
+ }
+
+ /* If both foreground and background are requested, see if the
+ distance between them is OK. We just check to see if the distance
+ between the tty's foreground and background is close enough to the
+ distance between the standard foreground and background. */
+ if (STRINGP (fg) && STRINGP (bg))
+ {
+ int delta_delta
+ = (color_distance (&fg_std_color, &bg_std_color)
+ - color_distance (&fg_tty_color, &bg_tty_color));
+ if (delta_delta > TTY_SAME_COLOR_THRESHOLD
+ || delta_delta < -TTY_SAME_COLOR_THRESHOLD)
+ return 0;
+ }
+
+
+ /* See if the capabilities we selected above are supported, with the
+ given colors. */
+ if (test_caps != 0 &&
+ ! tty_capable_p (FRAME_TTY (f), test_caps, fg_tty_color.pixel, bg_tty_color.pixel))
+ return 0;
+
+
+ /* Hmmm, everything checks out, this terminal must support this face. */
+ return 1;
+}
+
+
+DEFUN ("display-supports-face-attributes-p",
+ Fdisplay_supports_face_attributes_p, Sdisplay_supports_face_attributes_p,
+ 1, 2, 0,
+ doc: /* Return non-nil if all the face attributes in ATTRIBUTES are supported.
+The optional argument DISPLAY can be a display name, a frame, or
+nil (meaning the selected frame's display)
+
+The definition of `supported' is somewhat heuristic, but basically means
+that a face containing all the attributes in ATTRIBUTES, when merged
+with the default face for display, can be represented in a way that's
+
+ \(1) different in appearance than the default face, and
+ \(2) `close in spirit' to what the attributes specify, if not exact.
+
+Point (2) implies that a `:weight black' attribute will be satisfied by
+any display that can display bold, and a `:foreground \"yellow\"' as long
+as it can display a yellowish color, but `:slant italic' will _not_ be
+satisfied by the tty display code's automatic substitution of a `dim'
+face for italic. */)
+ (attributes, display)
+ Lisp_Object attributes, display;
+{
+ int supports, i;
+ Lisp_Object frame;
+ struct frame *f;
+ struct face *def_face;
+ Lisp_Object attrs[LFACE_VECTOR_SIZE];
+
+ if (noninteractive || !initialized)
+ /* We may not be able to access low-level face information in batch
+ mode, or before being dumped, and this function is not going to
+ be very useful in those cases anyway, so just give up. */
+ return Qnil;
+
+ if (NILP (display))
+ frame = selected_frame;
+ else if (FRAMEP (display))
+ frame = display;
+ else
+ {
+ /* Find any frame on DISPLAY. */
+ Lisp_Object fl_tail;
+
+ frame = Qnil;
+ for (fl_tail = Vframe_list; CONSP (fl_tail); fl_tail = XCDR (fl_tail))
+ {
+ frame = XCAR (fl_tail);
+ if (!NILP (Fequal (Fcdr (Fassq (Qdisplay,
+ XFRAME (frame)->param_alist)),
+ display)))
+ break;
+ }
+ }
+
+ CHECK_LIVE_FRAME (frame);
+ f = XFRAME (frame);
+
+ for (i = 0; i < LFACE_VECTOR_SIZE; i++)
+ attrs[i] = Qunspecified;
+ merge_face_ref (f, attributes, attrs, 1, 0);
+
+ def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
+ if (def_face == NULL)
+ {
+ if (! realize_basic_faces (f))
+ error ("Cannot realize default face");
+ def_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
+ }
+
+ /* Dispatch to the appropriate handler. */
+ if (FRAME_TERMCAP_P (f) || FRAME_MSDOS_P (f))
+ supports = tty_supports_face_attributes_p (f, attrs, def_face);
+#ifdef HAVE_WINDOW_SYSTEM
+ else
+ supports = x_supports_face_attributes_p (f, attrs, def_face);
+#endif
+
+ return supports ? Qt : Qnil;
+}
+
+\f
/***********************************************************************
Font selection
***********************************************************************/
/* Merge SYMBOL's face with the default face. */
get_lface_attributes (f, symbol, symbol_attrs, 1);
- merge_face_vectors (f, symbol_attrs, attrs, Qnil);
+ merge_face_vectors (f, symbol_attrs, attrs, 0);
/* Realize the face. */
new_face = realize_face (c, attrs, 0, NULL, id);
Lisp_Object attrs[LFACE_VECTOR_SIZE];
struct face *default_face = FACE_FROM_ID (f, DEFAULT_FACE_ID);
bcopy (default_face->lface, attrs, sizeof attrs);
- merge_face_vector_with_property (f, attrs, prop);
+ merge_face_ref (f, prop, attrs, 1, 0);
face_id = lookup_face (f, attrs, ch, NULL);
}
/* Look at properties from overlays. */
{
int next_overlay;
- int len;
-
- /* First try with room for 40 overlays. */
- len = 40;
- overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
- noverlays = overlays_at (pos, 0, &overlay_vec, &len,
- &next_overlay, NULL, 0);
-
- /* If there are more than 40, make enough space for all, and try
- again. */
- if (noverlays > len)
- {
- len = noverlays;
- overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
- noverlays = overlays_at (pos, 0, &overlay_vec, &len,
- &next_overlay, NULL, 0);
- }
+ GET_OVERLAYS_AT (pos, overlay_vec, noverlays, &next_overlay, 0);
if (next_overlay < endpos)
endpos = next_overlay;
}
/* Merge in attributes specified via text properties. */
if (!NILP (prop))
- merge_face_vector_with_property (f, attrs, prop);
+ merge_face_ref (f, prop, attrs, 1, 0);
/* Now merge the overlay data. */
noverlays = sort_overlays (overlay_vec, noverlays, w);
prop = Foverlay_get (overlay_vec[i], propname);
if (!NILP (prop))
- merge_face_vector_with_property (f, attrs, prop);
+ merge_face_ref (f, prop, attrs, 1, 0);
oend = OVERLAY_END (overlay_vec[i]);
oendpos = OVERLAY_POSITION (oend);
/* If in the region, merge in the region face. */
if (pos >= region_beg && pos < region_end)
{
- Lisp_Object region_face = lface_from_face_name (f, Qregion, 0);
- merge_face_vectors (f, XVECTOR (region_face)->contents, attrs, Qnil);
+ merge_named_face (f, Qregion, attrs, 0);
if (region_end < endpos)
endpos = region_end;
/* Merge in attributes specified via text properties. */
if (!NILP (prop))
- merge_face_vector_with_property (f, attrs, prop);
+ merge_face_ref (f, prop, attrs, 1, 0);
/* If in the region, merge in the region face. */
if (bufpos
&& bufpos >= region_beg
&& bufpos < region_end)
- {
- Lisp_Object region_face = lface_from_face_name (f, Qregion, 0);
- merge_face_vectors (f, XVECTOR (region_face)->contents, attrs, Qnil);
- }
+ merge_named_face (f, Qregion, attrs, 0);
/* Look up a realized face with the given face attributes,
or realize a new one for ASCII characters. */
defsubr (&Sinternal_merge_in_global_face);
defsubr (&Sface_font);
defsubr (&Sframe_face_alist);
- defsubr (&Stty_supports_face_attributes_p);
+ defsubr (&Sdisplay_supports_face_attributes_p);
defsubr (&Scolor_distance);
defsubr (&Sinternal_set_font_selection_order);
defsubr (&Sinternal_set_alternative_font_family_alist);
HCoop / bpt / emacs.git / blobdiff