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Code Issues Releases Activity

(Vdisplay_pixels_per_inch): New variable.

Browse Source 
(Vshow_text_cursor_in_void): New variable.
(glyph_to_pixel_coords): Don't use negative hpos.
(x_y_to_hpos_vpos): Fix for partially visible first glyph.
(append_stretch_glyph): Change ascent arg to be actual value
in pixels rather than ratio to height. Callers changed.
(calc_pixel_width_or_height): New aux function, implementing
pixel based artihmetic for glyph widths and heights.
(produce_stretch_glyph): Use calc_pixel_width_or_height for
:width, :height, :align-to, and :ascent, thus allowing these to
be specified in pixels as well as multiples of characters.
Don't produce stretch glyphs with zero width or height.
(get_specified_cursor_type): Declare static.
(get_window_cursor_type): Declare static.  Add glyph arg to be
able to know when cursor is on an image; always substitute
hollow-box cursor for filled-box cursor on images, to avoid
negative images and flicker when blinking the cursor.
(display_and_set_cursor): Pass glyph to	get_window_cursor_type.
(note_mode_line_or_margin_highlight): Use non-text cursor rather
than vertical scroll-bar cursor in display margins.
(note_mouse_highlight): Use non-text cursor rather than text
cursor in fringes and over images in the text area.
Use non-text cursor when mouse pointer is outside editable text,
i.e. in the void after end-of-line or end-of-buffer; this was
already done for W32, but is now standard for all systems --
user can toggle show-text-cursor-in-void to get old behaviour.
(syms_of_xdisp): DEFVAR_LISP Vshow_text_cursor_in_void and
Vdisplay_pixels_per_inch.
This commit is contained in:
Kim F. Storm 2003-11-27 21:17:23 +00:00
parent 1365f3435e
commit f65536faef
1 changed files with 303 additions and 58 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

361
src/xdisp.c
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@ -295,16 +295,24 @@ extern Lisp_Object Qface, Qinvisible, Qwidth;
/* Symbols used in text property values. */
Lisp_Object Vdisplay_pixels_per_inch;
Lisp_Object Qspace, QCalign_to, QCrelative_width, QCrelative_height;
Lisp_Object Qleft_margin, Qright_margin, Qspace_width, Qraise;
Lisp_Object Qmargin;
extern Lisp_Object Qheight;
extern Lisp_Object QCwidth, QCheight, QCascent;
extern Lisp_Object Qscroll_bar;
/* Non-nil means highlight trailing whitespace. */
Lisp_Object Vshow_trailing_whitespace;
/* Non-nil means show the text cursor in void text areas
i.e. in blank areas after eol and eob. This used to be
the default in 21.3. */
Lisp_Object Vshow_text_cursor_in_void;
/* Name of the face used to highlight trailing whitespace. */
Lisp_Object Qtrailing_whitespace;
@ -1539,6 +1547,10 @@ glyph_to_pixel_coords (w, hpos, vpos, frame_x, frame_y)
++glyph;
}
/* If first glyph is partially visible, its first visible position is still 0. */
if (hpos < 0)
hpos = 0;
success_p = 1;
}
else
@ -1613,7 +1625,7 @@ x_y_to_hpos_vpos (w, x, y, hpos, vpos, area, buffer_only_p)
else if (x < window_box_right_offset (w, TEXT_AREA))
{
*area = TEXT_AREA;
x0 = window_box_left_offset (w, TEXT_AREA);
x0 = window_box_left_offset (w, TEXT_AREA) + min (row->x, 0);
}
else
{
@ -17818,20 +17830,19 @@ produce_image_glyph (it)
/* Append a stretch glyph to IT->glyph_row. OBJECT is the source
of the glyph, WIDTH and HEIGHT are the width and height of the
stretch. ASCENT is the percentage/100 of HEIGHT to use for the
ascent of the glyph (0 <= ASCENT <= 1). */
stretch. ASCENT is the ascent of the glyph (0 <= ASCENT <= HEIGHT). */
static void
append_stretch_glyph (it, object, width, height, ascent)
struct it *it;
Lisp_Object object;
int width, height;
double ascent;
int ascent;
{
struct glyph *glyph;
enum glyph_row_area area = it->area;
xassert (ascent >= 0 && ascent <= 1);
xassert (ascent >= 0 && ascent <= height);
glyph = it->glyph_row->glyphs[area] + it->glyph_row->used[area];
if (glyph < it->glyph_row->glyphs[area + 1])
@ -17848,7 +17859,7 @@ append_stretch_glyph (it, object, width, height, ascent)
glyph->padding_p = 0;
glyph->glyph_not_available_p = 0;
glyph->face_id = it->face_id;
glyph->u.stretch.ascent = height * ascent;
glyph->u.stretch.ascent = ascent;
glyph->u.stretch.height = height;
glyph->font_type = FONT_TYPE_UNKNOWN;
++it->glyph_row->used[area];
@ -17856,6 +17867,209 @@ append_stretch_glyph (it, object, width, height, ascent)
}
/* Calculate a width or height in pixels from a specification using
the following elements:
SPEC ::=
NUM - a (fractional) multiple of the default font width/height
(NUM) - specifies exactly NUM pixels
UNIT - a fixed number of pixels, see below.
ELEMENT - size of a display element in pixels, see below.
(NUM . SPEC) - equals NUM * SPEC
(+ SPEC SPEC ...) - add pixel values
(- SPEC SPEC ...) - subtract pixel values
(- SPEC) - negate pixel value
NUM ::=
INT or FLOAT - a number constant
SYMBOL - use symbol's (buffer local) variable binding.
UNIT ::=
in - pixels per inch *)
mm - pixels per 1/1000 meter *)
cm - pixels per 1/100 meter *)
width - width of current font in pixels.
height - height of current font in pixels.
*) using the ratio(s) defined in display-pixels-per-inch.
ELEMENT ::=
left-fringe - left fringe width in pixels
(left-fringe . nil) - left fringe width if inside margins, else 0
(left-fringe . t) - left fringe width if outside margins, else 0
right-fringe - right fringe width in pixels
(right-fringe . nil) - right fringe width if inside margins, else 0
(right-fringe . t) - right fringe width if outside margins, else 0
left-margin - left margin width in pixels
right-margin - right margin width in pixels
scroll-bar - scroll-bar area width in pixels
(scroll-bar . left) - scroll-bar width if on left, else 0
(scroll-bar . right) - scroll-bar width if on right, else 0
Examples:
Pixels corresponding to 5 inches:
(5 . in)
Total width of non-text areas on left side of window:
(+ left-fringe left-margin (scroll-bar . left))
Total width of fringes if inside display margins:
(+ (left-fringe) (right-fringe))
Width of left margin minus width of 1 character in the default font:
(- left-margin 1)
Width of left margin minus width of 2 characters in the current font:
(- left-margin (2 . width))
Width of left fringe plus left margin minus one pixel:
(- (+ left-fringe left-margin) (1))
(+ left-fringe left-margin (- (1)))
(+ left-fringe left-margin (-1))
*/
#define NUMVAL(X) \
((INTEGERP (X) || FLOATP (X)) \
? XFLOATINT (X) \
: - 1)
static int
calc_pixel_width_or_height (res, it, prop, font, width_p)
double *res;
struct it *it;
Lisp_Object prop;
XFontStruct *font;
int width_p;
{
double pixels;
#define OK_PIXELS(val) ((*res = (val)), 1)
if (SYMBOLP (prop))
{
if (SCHARS (SYMBOL_NAME (prop)) == 2)
{
char *unit = SDATA (SYMBOL_NAME (prop));
if (unit[0] == 'i' && unit[1] == 'n')
pixels = 1.0;
else if (unit[0] == 'm' && unit[1] == 'm')
pixels = 25.4;
else if (unit[0] == 'c' && unit[1] == 'm')
pixels = 2.54;
else
pixels = 0;
if (pixels > 0)
{
double ppi;
if ((ppi = NUMVAL (Vdisplay_pixels_per_inch), ppi > 0)
|| (CONSP (Vdisplay_pixels_per_inch)
&& (ppi = (width_p
? NUMVAL (XCAR (Vdisplay_pixels_per_inch))
: NUMVAL (XCDR (Vdisplay_pixels_per_inch))),
ppi > 0)))
return OK_PIXELS (ppi / pixels);
return 0;
}
}
if (EQ (prop, Qheight))
return OK_PIXELS (font ? FONT_HEIGHT (font) : FRAME_LINE_HEIGHT (it->f));
if (EQ (prop, Qwidth))
return OK_PIXELS (font ? FONT_WIDTH (font) : FRAME_COLUMN_WIDTH (it->f));
if (EQ (prop, Qleft_fringe))
return OK_PIXELS (WINDOW_LEFT_FRINGE_WIDTH (it->w));
if (EQ (prop, Qright_fringe))
return OK_PIXELS (WINDOW_RIGHT_FRINGE_WIDTH (it->w));
if (EQ (prop, Qleft_margin))
return OK_PIXELS (WINDOW_LEFT_MARGIN_WIDTH (it->w));
if (EQ (prop, Qright_margin))
return OK_PIXELS (WINDOW_RIGHT_MARGIN_WIDTH (it->w));
if (EQ (prop, Qscroll_bar))
return OK_PIXELS (WINDOW_SCROLL_BAR_AREA_WIDTH (it->w));
prop = Fbuffer_local_value (prop, it->w->buffer);
}
if (INTEGERP (prop) || FLOATP (prop))
{
int base_unit = (width_p
? FRAME_COLUMN_WIDTH (it->f)
: FRAME_LINE_HEIGHT (it->f));
return OK_PIXELS (XFLOATINT (prop) * base_unit);
}
if (CONSP (prop))
{
Lisp_Object car = XCAR (prop);
Lisp_Object cdr = XCDR (prop);
if (SYMBOLP (car))
{
if (EQ (car, Qplus) || EQ (car, Qminus))
{
int first = 1;
double px;
pixels = 0;
while (CONSP (cdr))
{
if (!calc_pixel_width_or_height (&px, it, XCAR (cdr), font, width_p))
return 0;
if (first)
pixels = (EQ (car, Qplus) ? px : -px), first = 0;
else
pixels += px;
cdr = XCDR (cdr);
}
if (EQ (car, Qminus))
pixels = -pixels;
return OK_PIXELS (pixels);
}
if (EQ (car, Qleft_fringe))
return OK_PIXELS ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (it->w)
== !NILP (cdr))
? WINDOW_LEFT_FRINGE_WIDTH (it->w)
: 0);
if (EQ (car, Qright_fringe))
return OK_PIXELS ((WINDOW_HAS_FRINGES_OUTSIDE_MARGINS (it->w)
== !NILP (cdr))
? WINDOW_RIGHT_FRINGE_WIDTH (it->w)
: 0);
if (EQ (car, Qscroll_bar))
return OK_PIXELS ((WINDOW_HAS_VERTICAL_SCROLL_BAR_ON_LEFT (it->w)
== EQ (cdr, Qleft))
? WINDOW_SCROLL_BAR_AREA_WIDTH (it->w)
: 0);
car = Fbuffer_local_value (car, it->w->buffer);
}
if (INTEGERP (car) || FLOATP (car))
{
double fact;
pixels = XFLOATINT (car);
if (NILP (cdr))
return OK_PIXELS (pixels);
if (calc_pixel_width_or_height (&fact, it, cdr, font, width_p))
return OK_PIXELS (pixels * fact);
return 0;
}
return 0;
}
return 0;
}
/* Produce a stretch glyph for iterator IT. IT->object is the value
of the glyph property displayed. The value must be a list
`(space KEYWORD VALUE ...)' with the following KEYWORD/VALUE pairs
@ -17887,20 +18101,16 @@ append_stretch_glyph (it, object, width, height, ascent)
of the stretch should be used for the ascent of the stretch.
ASCENT must be in the range 0 <= ASCENT <= 100. */
#define NUMVAL(X) \
((INTEGERP (X) || FLOATP (X)) \
? XFLOATINT (X) \
: - 1)
static void
produce_stretch_glyph (it)
struct it *it;
{
/* (space :width WIDTH :height HEIGHT. */
/* (space :width WIDTH :height HEIGHT ...) */
Lisp_Object prop, plist;
int width = 0, height = 0;
double ascent = 0;
int zero_width_ok_p = 0, zero_height_ok_p = 0;
int ascent = 0;
double tem;
struct face *face = FACE_FROM_ID (it->f, it->face_id);
XFontStruct *font = face->font ? face->font : FRAME_FONT (it->f);
@ -17911,10 +18121,13 @@ produce_stretch_glyph (it)
plist = XCDR (it->object);
/* Compute the width of the stretch. */
if (prop = Fplist_get (plist, QCwidth),
NUMVAL (prop) > 0)
/* Absolute width `:width WIDTH' specified and valid. */
width = NUMVAL (prop) * FRAME_COLUMN_WIDTH (it->f);
if ((prop = Fplist_get (plist, QCwidth), !NILP (prop))
&& calc_pixel_width_or_height (&tem, it, prop, font, 1))
{
/* Absolute width `:width WIDTH' specified and valid. */
zero_width_ok_p = 1;
width = (int)tem;
}
else if (prop = Fplist_get (plist, QCrelative_width),
NUMVAL (prop) > 0)
{
@ -17939,38 +18152,48 @@ produce_stretch_glyph (it)
x_produce_glyphs (&it2);
width = NUMVAL (prop) * it2.pixel_width;
}
else if (prop = Fplist_get (plist, QCalign_to),
NUMVAL (prop) > 0)
width = NUMVAL (prop) * FRAME_COLUMN_WIDTH (it->f) - it->current_x;
else if ((prop = Fplist_get (plist, QCalign_to), !NILP (prop))
&& calc_pixel_width_or_height (&tem, it, prop, font, 1))
{
width = max (0, (int)tem - it->current_x);
zero_width_ok_p = 1;
}
else
/* Nothing specified -> width defaults to canonical char width. */
width = FRAME_COLUMN_WIDTH (it->f);
if (width <= 0 && (width < 0 || !zero_width_ok_p))
width = 1;
/* Compute height. */
if (prop = Fplist_get (plist, QCheight),
NUMVAL (prop) > 0)
height = NUMVAL (prop) * FRAME_LINE_HEIGHT (it->f);
if ((prop = Fplist_get (plist, QCheight), !NILP (prop))
&& calc_pixel_width_or_height (&tem, it, prop, font, 0))
{
height = (int)tem;
zero_height_ok_p = 1;
}
else if (prop = Fplist_get (plist, QCrelative_height),
NUMVAL (prop) > 0)
height = FONT_HEIGHT (font) * NUMVAL (prop);
else
height = FONT_HEIGHT (font);
if (height <= 0 && (height < 0 || !zero_height_ok_p))
height = 1;
/* Compute percentage of height used for ascent. If
`:ascent ASCENT' is present and valid, use that. Otherwise,
derive the ascent from the font in use. */
if (prop = Fplist_get (plist, QCascent),
NUMVAL (prop) > 0 && NUMVAL (prop) <= 100)
ascent = NUMVAL (prop) / 100.0;
ascent = height * NUMVAL (prop) / 100.0;
else if (!NILP (prop)
&& calc_pixel_width_or_height (&tem, it, prop, font, 0))
ascent = min (max (0, (int)tem), height);
else
ascent = (double) FONT_BASE (font) / FONT_HEIGHT (font);
ascent = (height * FONT_BASE (font)) / FONT_HEIGHT (font);
if (width <= 0)
width = 1;
if (height <= 0)
height = 1;
if (it->glyph_row)
if (width > 0 && height > 0 && it->glyph_row)
{
Lisp_Object object = it->stack[it->sp - 1].string;
if (!STRINGP (object))
@ -17979,11 +18202,11 @@ produce_stretch_glyph (it)
}
it->pixel_width = width;
it->ascent = it->phys_ascent = height * ascent;
it->ascent = it->phys_ascent = ascent;
it->descent = it->phys_descent = height - it->ascent;
it->nglyphs = 1;
it->nglyphs = width > 0 && height > 0 ? 1 : 0;
if (face->box != FACE_NO_BOX)
if (width > 0 && height > 0 && face->box != FACE_NO_BOX)
{
if (face->box_line_width > 0)
{
@ -18144,8 +18367,8 @@ x_produce_glyphs (it)
{
/* Translate a space with a `space-width' property
into a stretch glyph. */
double ascent = (double) FONT_BASE (font)
/ FONT_HEIGHT (font);
int ascent = (((it->ascent + it->descent) * FONT_BASE (font))
/ FONT_HEIGHT (font));
append_stretch_glyph (it, it->object, it->pixel_width,
it->ascent + it->descent, ascent);
}
@ -18193,9 +18416,8 @@ x_produce_glyphs (it)
if (it->glyph_row)
{
double ascent = (double) it->ascent / (it->ascent + it->descent);
append_stretch_glyph (it, it->object, it->pixel_width,
it->ascent + it->descent, ascent);
it->ascent + it->descent, it->ascent);
}
}
else
@ -18738,7 +18960,7 @@ x_clear_end_of_line (to_x)
ARG. If type is BAR_CURSOR, return in *WIDTH the specified width
of the bar cursor. */
enum text_cursor_kinds
static enum text_cursor_kinds
get_specified_cursor_type (arg, width)
Lisp_Object arg;
int *width;
@ -18829,9 +19051,10 @@ set_frame_cursor_types (f, arg)
setting of cursor-type. If explicitly marked off, draw no cursor.
In all other cases, we want a hollow box cursor. */
enum text_cursor_kinds
get_window_cursor_type (w, width, active_cursor)
static enum text_cursor_kinds
get_window_cursor_type (w, glyph, width, active_cursor)
struct window *w;
struct glyph *glyph;
int *width;
int *active_cursor;
{
@ -18895,7 +19118,13 @@ get_window_cursor_type (w, width, active_cursor)
/* Use normal cursor if not blinked off. */
if (!w->cursor_off_p)
return cursor_type;
{
if (glyph->type == IMAGE_GLYPH) {
if (cursor_type == FILLED_BOX_CURSOR)
cursor_type = HOLLOW_BOX_CURSOR;
}
return cursor_type;
}
/* Cursor is blinked off, so determine how to "toggle" it. */
@ -19215,7 +19444,8 @@ display_and_set_cursor (w, on, hpos, vpos, x, y)
xassert (interrupt_input_blocked);
/* Set new_cursor_type to the cursor we want to be displayed. */
new_cursor_type = get_window_cursor_type (w, &new_cursor_width, &active_cursor);
new_cursor_type = get_window_cursor_type (w, glyph,
&new_cursor_width, &active_cursor);
/* If cursor is currently being shown and we don't want it to be or
it is in the wrong place, or the cursor type is not what we want,
@ -19729,14 +19959,14 @@ note_mode_line_or_margin_highlight (w, x, y, area)
{
struct frame *f = XFRAME (w->frame);
Display_Info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
Cursor cursor = dpyinfo->vertical_scroll_bar_cursor;
Cursor cursor = FRAME_X_OUTPUT (f)->nontext_cursor;
int charpos;
Lisp_Object string, help, map, pos;
if (area == ON_MODE_LINE || area == ON_HEADER_LINE)
string = mode_line_string (w, &x, &y, area, &charpos);
string = mode_line_string (w, &x, &y, 0, 0, area, &charpos);
else
string = marginal_area_string (w, &x, &y, area, &charpos);
string = marginal_area_string (w, &x, &y, 0, 0, area, &charpos);
if (STRINGP (string))
{
@ -19755,11 +19985,14 @@ note_mode_line_or_margin_highlight (w, x, y, area)
}
/* Change the mouse pointer according to what is under X/Y. */
map = Fget_text_property (pos, Qlocal_map, string);
if (!KEYMAPP (map))
map = Fget_text_property (pos, Qkeymap, string);
if (KEYMAPP (map))
cursor = FRAME_X_OUTPUT (f)->nontext_cursor;
if (area == ON_MODE_LINE)
{
map = Fget_text_property (pos, Qlocal_map, string);
if (!KEYMAPP (map))
map = Fget_text_property (pos, Qkeymap, string);
if (!KEYMAPP (map))
cursor = dpyinfo->vertical_scroll_bar_cursor;
}
}
rif->define_frame_cursor (f, cursor);
@ -19844,6 +20077,8 @@ note_mouse_highlight (f, x, y)
if (part == ON_VERTICAL_BORDER)
cursor = FRAME_X_OUTPUT (f)->horizontal_drag_cursor;
else if (part == ON_LEFT_FRINGE || part == ON_RIGHT_FRINGE)
cursor = FRAME_X_OUTPUT (f)->nontext_cursor;
else
cursor = FRAME_X_OUTPUT (f)->text_cursor;
@ -19872,14 +20107,10 @@ note_mouse_highlight (f, x, y)
|| area != TEXT_AREA
|| !MATRIX_ROW (w->current_matrix, vpos)->displays_text_p)
{
#if defined (HAVE_NTGUI)
/* ++KFS: Why is this necessary on W32 ? */
clear_mouse_face (dpyinfo);
cursor = FRAME_X_OUTPUT (f)->nontext_cursor;
#else
if (clear_mouse_face (dpyinfo))
cursor = No_Cursor;
#endif
if (NILP (Vshow_text_cursor_in_void))
cursor = FRAME_X_OUTPUT (f)->nontext_cursor;
goto set_cursor;
}
@ -19892,6 +20123,9 @@ note_mouse_highlight (f, x, y)
if (BUFFERP (object) && pos > BUF_Z (b))
goto set_cursor;
if (glyph->type == IMAGE_GLYPH)
cursor = FRAME_X_OUTPUT (f)->nontext_cursor;
/* Make the window's buffer temporarily current for
overlays_at and compute_char_face. */
obuf = current_buffer;
@ -20947,6 +21181,11 @@ wide as that tab on the display. */);
The face used for trailing whitespace is `trailing-whitespace'. */);
Vshow_trailing_whitespace = Qnil;
DEFVAR_LISP ("show-text-cursor-in-void", &Vshow_text_cursor_in_void,
doc: /* Non-nil means show the text cursor in void text areas.
The default is to show the non-text (typically arrow) cursor. */);
Vshow_text_cursor_in_void = Qnil;
DEFVAR_LISP ("inhibit-redisplay", &Vinhibit_redisplay,
doc: /* Non-nil means don't actually do any redisplay.
This is used for internal purposes. */);
@ -20985,6 +21224,11 @@ Recenter the window whenever point gets within this many lines
of the top or bottom of the window. */);
scroll_margin = 0;
DEFVAR_LISP ("display-pixels-per-inch", &Vdisplay_pixels_per_inch,
doc: /* Pixels per inch on current display.
Value is a number or a cons (WIDTH-DPI . HEIGHT-DPI). */);
Vdisplay_pixels_per_inch = make_float (72.0);
#if GLYPH_DEBUG
DEFVAR_INT ("debug-end-pos", &debug_end_pos, doc: /* Don't ask. */);
#endif
@ -21029,6 +21273,7 @@ This variable is not guaranteed to be accurate except while processing
This variable has the same structure as `mode-line-format' (which see),
and is used only on frames for which no explicit name has been set
\(see `modify-frame-parameters'). */);
DEFVAR_LISP ("icon-title-format", &Vicon_title_format,
doc: /* Template for displaying the title bar of an iconified frame.
\(Assuming the window manager supports this feature.)