/* Window creation, deletion and examination for GNU Emacs.
Does not include redisplay.
- Copyright (C) 1985,86,87,93,94,95,96,97,1998 Free Software Foundation, Inc.
+ Copyright (C) 1985,86,87,93,94,95,96,97,1998,2000
+ Free Software Foundation, Inc.
This file is part of GNU Emacs.
#include <config.h>
#include "lisp.h"
#include "buffer.h"
+#include "keyboard.h"
#include "frame.h"
#include "window.h"
#include "commands.h"
#include "indent.h"
#include "termchar.h"
#include "disptab.h"
-#include "keyboard.h"
#include "dispextern.h"
#include "blockinput.h"
#include "intervals.h"
#ifdef MSDOS
#include "msdos.h"
#endif
+#ifdef macintosh
+#include "macterm.h"
+#endif
#ifndef max
#define max(a, b) ((a) < (b) ? (b) : (a))
static int foreach_window_1 P_ ((struct window *,
int (* fn) (struct window *, void *),
void *));
+static Lisp_Object window_list_1 P_ ((Lisp_Object, Lisp_Object, Lisp_Object));
/* This is the window in which the terminal's cursor should
be left when nothing is being done with it. This must
int pop_up_frames;
+/* Nonzero means reuse existing frames for displaying buffers. */
+
+int display_buffer_reuse_frames;
+
/* Non-nil means use this function instead of default */
Lisp_Object Vpop_up_frame_function;
Lisp_Object Vdisplay_buffer_function;
+/* Non-nil means that Fdisplay_buffer should even the heights of windows. */
+
+Lisp_Object Veven_window_heights;
+
/* List of buffer *names* for buffers that should have their own frames. */
Lisp_Object Vspecial_display_buffer_names;
XSETFASTINT (p->height, 0);
XSETFASTINT (p->width, 0);
XSETFASTINT (p->hscroll, 0);
+ XSETFASTINT (p->min_hscroll, 0);
p->orig_top = p->orig_height = Qnil;
p->start = Fmake_marker ();
p->pointm = Fmake_marker ();
Lisp_Object window;
{
struct window *w = decode_window (window);
- return (MINI_WINDOW_P (w) ? Qt : Qnil);
+ return MINI_WINDOW_P (w) ? Qt : Qnil;
}
+
DEFUN ("pos-visible-in-window-p", Fpos_visible_in_window_p,
- Spos_visible_in_window_p, 0, 2, 0,
+ Spos_visible_in_window_p, 0, 3, 0,
"Return t if position POS is currently on the frame in WINDOW.\n\
-Returns nil if that position is scrolled vertically out of view.\n\
-POS defaults to point; WINDOW, to the selected window.")
- (pos, window)
- Lisp_Object pos, window;
+Return nil if that position is scrolled vertically out of view.\n\
+If a character is only partially visible, nil is returned, unless the\n\
+optional argument PARTIALLY is non-nil.\n\
+POS defaults to point in WINDOW; WINDOW defaults to the selected window.")
+ (pos, window, partially)
+ Lisp_Object pos, window, partially;
{
register struct window *w;
register int posint;
register struct buffer *buf;
struct text_pos top;
Lisp_Object in_window;
+ int fully_p;
- if (NILP (pos))
- posint = PT;
- else
+ w = decode_window (window);
+ buf = XBUFFER (w->buffer);
+ SET_TEXT_POS_FROM_MARKER (top, w->start);
+
+ if (!NILP (pos))
{
CHECK_NUMBER_COERCE_MARKER (pos, 0);
posint = XINT (pos);
}
+ else if (w == XWINDOW (selected_window))
+ posint = PT;
+ else
+ posint = XMARKER (w->pointm)->charpos;
- w = decode_window (window);
- buf = XBUFFER (w->buffer);
- SET_TEXT_POS_FROM_MARKER (top, w->start);
-
- /* If position above window, it's not visible. */
+ /* If position is above window start, it's not visible. */
if (posint < CHARPOS (top))
in_window = Qnil;
else if (XFASTINT (w->last_modified) >= BUF_MODIFF (buf)
- && XFASTINT (w->last_overlay_modified) >= BUF_OVERLAY_MODIFF (buf)
- && posint < BUF_Z (buf) - XFASTINT (w->window_end_pos))
- /* If frame is up to date, and POSINT is < window end pos, use
- that info. This doesn't work for POSINT == end pos, because
- the window end pos is actually the position _after_ the last
- char in the window. */
- in_window = Qt;
+ && XFASTINT (w->last_overlay_modified) >= BUF_OVERLAY_MODIFF (buf)
+ && posint < BUF_Z (buf) - XFASTINT (w->window_end_pos))
+ {
+ /* If frame is up-to-date, and POSINT is < window end pos, use
+ that info. This doesn't work for POSINT == end pos, because
+ the window end pos is actually the position _after_ the last
+ char in the window. */
+ if (NILP (partially))
+ {
+ pos_visible_p (w, posint, &fully_p, NILP (partially));
+ in_window = fully_p ? Qt : Qnil;
+ }
+ else
+ in_window = Qt;
+ }
else if (posint > BUF_ZV (buf))
in_window = Qnil;
else if (CHARPOS (top) < BUF_BEGV (buf) || CHARPOS (top) > BUF_ZV (buf))
in_window = Qnil;
else
{
- struct it it;
- start_display (&it, w, top);
- move_it_to (&it, posint, 0, it.last_visible_y, -1,
- MOVE_TO_POS | MOVE_TO_X | MOVE_TO_Y);
- in_window = IT_CHARPOS (it) == posint ? Qt : Qnil;
+ if (pos_visible_p (w, posint, &fully_p, NILP (partially)))
+ in_window = !NILP (partially) || fully_p ? Qt : Qnil;
+ else
+ in_window = Qnil;
}
return in_window;
}
+
\f
static struct window *
decode_window (window)
"Set number of columns WINDOW is scrolled from left margin to NCOL.\n\
NCOL should be zero or positive.")
(window, ncol)
- register Lisp_Object window, ncol;
+ Lisp_Object window, ncol;
{
- register struct window *w;
+ struct window *w = decode_window (window);
+ int hscroll;
CHECK_NUMBER (ncol, 1);
- if (XINT (ncol) < 0) XSETFASTINT (ncol, 0);
- w = decode_window (window);
- if (XINT (w->hscroll) != XINT (ncol))
- /* Prevent redisplay shortcuts */
+ hscroll = max (0, XINT (ncol));
+
+ /* Prevent redisplay shortcuts when changing the hscroll. */
+ if (XINT (w->hscroll) != hscroll)
XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1;
- w->hscroll = ncol;
+
+ w->hscroll = make_number (hscroll);
return ncol;
}
register struct window *w;
register int *x, *y;
{
+ /* Let's make this a global enum later, instead of using numbers
+ everywhere. */
+ enum {ON_NOTHING, ON_TEXT, ON_MODE_LINE, ON_VERTICAL_BORDER,
+ ON_HEADER_LINE, ON_LEFT_FRINGE, ON_RIGHT_FRINGE};
+
struct frame *f = XFRAME (WINDOW_FRAME (w));
int left_x, right_x, top_y, bottom_y;
int flags_area_width = FRAME_LEFT_FLAGS_AREA_WIDTH (f);
+ int part;
+ int ux = CANON_X_UNIT (f), uy = CANON_Y_UNIT (f);
+ int x0 = XFASTINT (w->left) * ux;
+ int x1 = x0 + XFASTINT (w->width) * ux;
+ if (*x < x0 || *x >= x1)
+ return ON_NOTHING;
+
/* In what's below, we subtract 1 when computing right_x because we
want the rightmost pixel, which is given by left_pixel+width-1. */
if (w->pseudo_window_p)
{
left_x = 0;
- right_x = XFASTINT (w->width) * CANON_Y_UNIT (f) - 1;
+ right_x = XFASTINT (w->width) * CANON_X_UNIT (f) - 1;
top_y = WINDOW_DISPLAY_TOP_EDGE_PIXEL_Y (w);
bottom_y = WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w);
}
bottom_y = WINDOW_DISPLAY_BOTTOM_EDGE_PIXEL_Y (w);
}
- if (*y < top_y
- || *y >= bottom_y
- || *x < (left_x
- - flags_area_width
- - (FRAME_LEFT_SCROLL_BAR_WIDTH (f)
- * CANON_X_UNIT (f)))
- || *x > right_x + flags_area_width)
- /* Completely outside anything interesting. */
- return 0;
- else if (WINDOW_WANTS_MODELINE_P (w)
- && *y >= bottom_y - CURRENT_MODE_LINE_HEIGHT (w))
- /* On the mode line. */
- return 2;
+ /* On the mode line or header line? If it's near the start of
+ the mode or header line of window that's has a horizontal
+ sibling, say it's on the vertical line. That's to be able
+ to resize windows horizontally in case we're using toolkit
+ scroll bars. */
+
+ if (WINDOW_WANTS_MODELINE_P (w)
+ && *y >= bottom_y - CURRENT_MODE_LINE_HEIGHT (w)
+ && *y < bottom_y)
+ {
+ /* We're somewhere on the mode line. We consider the place
+ between mode lines of horizontally adjacent mode lines
+ as the vertical border. If scroll bars on the left,
+ return the right window. */
+ part = ON_MODE_LINE;
+
+ if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f))
+ {
+ if (abs (*x - x0) < ux / 2)
+ part = ON_VERTICAL_BORDER;
+ }
+ else if (!WINDOW_RIGHTMOST_P (w) && abs (*x - x1) < ux / 2)
+ part = ON_VERTICAL_BORDER;
+ }
else if (WINDOW_WANTS_HEADER_LINE_P (w)
- && *y < top_y + CURRENT_HEADER_LINE_HEIGHT (w))
- /* On the top line. */
- return 4;
- else if (*x < left_x || *x >= right_x)
+ && *y < top_y + CURRENT_HEADER_LINE_HEIGHT (w)
+ && *y >= top_y)
{
- /* Other lines than the mode line don't include flags areas and
- scroll bars on the left. */
+ part = ON_HEADER_LINE;
- /* Convert X and Y to window-relative pixel coordinates. */
- *x -= left_x;
- *y -= top_y;
- return *x < left_x ? 5 : 6;
+ if (FRAME_HAS_VERTICAL_SCROLL_BARS_ON_LEFT (f))
+ {
+ if (abs (*x - x0) < ux / 2)
+ part = ON_VERTICAL_BORDER;
+ }
+ else if (!WINDOW_RIGHTMOST_P (w) && abs (*x - x1) < ux / 2)
+ part = ON_VERTICAL_BORDER;
+ }
+ /* Outside anything interesting? */
+ else if (*y < top_y
+ || *y >= bottom_y
+ || *x < (left_x
+ - flags_area_width
+ - FRAME_LEFT_SCROLL_BAR_WIDTH (f) * ux)
+ || *x > right_x + flags_area_width)
+ {
+ part = ON_NOTHING;
+ }
+ else if (FRAME_WINDOW_P (f))
+ {
+ if (!w->pseudo_window_p
+ && !FRAME_HAS_VERTICAL_SCROLL_BARS (f)
+ && !WINDOW_RIGHTMOST_P (w)
+ && (abs (*x - right_x - flags_area_width) < ux / 2))
+ {
+ part = ON_VERTICAL_BORDER;
+ }
+ else if (*x < left_x || *x > right_x)
+ {
+ /* Other lines than the mode line don't include flags areas and
+ scroll bars on the left. */
+
+ /* Convert X and Y to window-relative pixel coordinates. */
+ *x -= left_x;
+ *y -= top_y;
+ part = *x < left_x ? ON_LEFT_FRINGE : ON_RIGHT_FRINGE;
+ }
+ else
+ {
+ *x -= left_x;
+ *y -= top_y;
+ part = ON_TEXT;
+ }
}
- else if (!w->pseudo_window_p
- && !WINDOW_RIGHTMOST_P (w)
- && *x >= right_x - CANON_X_UNIT (f))
- /* On the border on the right side of the window? Assume that
- this area begins at RIGHT_X minus a canonical char width. */
- return 3;
else
{
- /* Convert X and Y to window-relative pixel coordinates. */
- *x -= left_x;
- *y -= top_y;
- return 1;
+ /* Need to say "*x > right_x" rather than >=, since on character
+ terminals, the vertical line's x coordinate is right_x. */
+ if (*x < left_x || *x > right_x)
+ {
+ /* Other lines than the mode line don't include flags areas and
+ scroll bars on the left. */
+
+ /* Convert X and Y to window-relative pixel coordinates. */
+ *x -= left_x;
+ *y -= top_y;
+ part = *x < left_x ? ON_LEFT_FRINGE : ON_RIGHT_FRINGE;
+ }
+ /* Here, too, "*x > right_x" is because of character terminals. */
+ else if (!w->pseudo_window_p
+ && !WINDOW_RIGHTMOST_P (w)
+ && *x > right_x - ux)
+ {
+ /* On the border on the right side of the window? Assume that
+ this area begins at RIGHT_X minus a canonical char width. */
+ part = ON_VERTICAL_BORDER;
+ }
+ else
+ {
+ /* Convert X and Y to window-relative pixel coordinates. */
+ *x -= left_x;
+ *y -= top_y;
+ part = ON_TEXT;
+ }
}
+
+ return part;
}
+
DEFUN ("coordinates-in-window-p", Fcoordinates_in_window_p,
Scoordinates_in_window_p, 2, 2, 0,
"Return non-nil if COORDINATES are in WINDOW.\n\
Check if window W contains coordinates *CW->x and *CW->y. If it
does, return W in *CW->window, as Lisp_Object, and return in
- *CW->part the part of the window under coordinates *X/*Y. Return
+ *CW->part the part of the window under coordinates *X,*Y. Return
zero from this function to stop iterating over windows. */
struct check_window_data
This is updated by redisplay, when it runs to completion.\n\
Simply changing the buffer text or setting `window-start'\n\
does not update this value.\n\
-If UP-TO-DATE is non-nil, compute the up-to-date position\n\
+If UPDATE is non-nil, compute the up-to-date position\n\
if it isn't already recorded.")
(window, update)
Lisp_Object window, update;
&& ! (! NILP (w->window_end_valid)
&& XFASTINT (w->last_modified) >= MODIFF))
{
- int opoint = PT, opoint_byte = PT_BYTE;
+ struct text_pos startp;
+ struct it it;
/* In case W->start is out of the range, use something
reasonable. This situation occured when loading a file with
`-l' containing a call to `rmail' with subsequent other
commands. At the end, W->start happened to be BEG, while
- rmail had already narrowed the buffer. This leads to an
- abort in temp_set_pt_both. */
+ rmail had already narrowed the buffer. */
if (XMARKER (w->start)->charpos < BEGV)
- TEMP_SET_PT_BOTH (BEGV, BEGV_BYTE);
+ SET_TEXT_POS (startp, BEGV, BEGV_BYTE);
else if (XMARKER (w->start)->charpos > ZV)
- TEMP_SET_PT_BOTH (ZV, ZV_BYTE);
+ SET_TEXT_POS (startp, ZV, ZV_BYTE);
else
- TEMP_SET_PT_BOTH (XMARKER (w->start)->charpos,
- XMARKER (w->start)->bytepos);
-
- Fvertical_motion (make_number (window_internal_height (w)), Qnil);
- XSETINT (value, PT);
- TEMP_SET_PT_BOTH (opoint, opoint_byte);
+ SET_TEXT_POS_FROM_MARKER (startp, w->start);
+
+ /* Cannot use Fvertical_motion because that function doesn't
+ cope with variable-height lines. */
+ start_display (&it, w, startp);
+ move_it_vertically (&it, window_box_height (w));
+ move_it_past_eol (&it);
+ value = make_number (IT_CHARPOS (it));
}
else
- XSETINT (value,
- BUF_Z (XBUFFER (buf)) - XFASTINT (w->window_end_pos));
+ XSETINT (value, BUF_Z (XBUFFER (buf)) - XFASTINT (w->window_end_pos));
return value;
}
Fgoto_char (pos);
else
set_marker_restricted (w->pointm, pos, w->buffer);
+
+ /* We have to make sure that redisplay updates the window to show
+ the new value of point. */
+ if (!EQ (window, selected_window))
+ ++windows_or_buffers_changed;
return pos;
}
register Lisp_Object tem, parent, sib;
register struct window *p;
register struct window *par;
- FRAME_PTR frame;
+ struct frame *f;
/* Because this function is called by other C code on non-leaf
windows, the CHECK_LIVE_WINDOW macro would choke inappropriately,
windows_or_buffers_changed++;
Vwindow_list = Qnil;
- frame = XFRAME (WINDOW_FRAME (p));
- FRAME_WINDOW_SIZES_CHANGED (frame) = 1;
+ f = XFRAME (WINDOW_FRAME (p));
+ FRAME_WINDOW_SIZES_CHANGED (f) = 1;
/* Are we trying to delete any frame's selected window? */
{
- Lisp_Object frame, pwindow;
+ Lisp_Object pwindow;
/* See if the frame's selected window is either WINDOW
or any subwindow of it, by finding all that window's parents
and comparing each one with WINDOW. */
- frame = WINDOW_FRAME (XWINDOW (window));
- pwindow = FRAME_SELECTED_WINDOW (XFRAME (frame));
+ pwindow = FRAME_SELECTED_WINDOW (f);
while (!NILP (pwindow))
{
if (EQ (window, selected_window))
Fselect_window (alternative);
else
- FRAME_SELECTED_WINDOW (XFRAME (frame)) = alternative;
+ FRAME_SELECTED_WINDOW (f) = alternative;
}
}
events and other events that access glyph matrices are not
processed while we are changing them. */
BLOCK_INPUT;
- free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (frame)));
+ free_window_matrices (XWINDOW (FRAME_ROOT_WINDOW (f)));
tem = p->next;
if (!NILP (tem))
p->buffer = p->hchild = p->vchild = Qnil;
/* Adjust glyph matrices. */
- adjust_glyphs (frame);
+ adjust_glyphs (f);
UNBLOCK_INPUT;
}
DEFUN ("window-list", Fwindow_list, Swindow_list, 0, 3, 0,
- "Return a list of windows in canonical ordering.\n\
-Arguments are like for `next-window'.")
- (window, minibuf, all_frames)
+ "Return a list of windows on FRAME, starting with WINDOW.\n\
+FRAME nil or omitted means use the selected frame.\n\
+WINDOW nil or omitted means use the selected window.\n\
+MINIBUF t means include the minibuffer window, even if it isn't active.\n\
+MINIBUF nil or omitted means include the minibuffer window only\n\
+if it's active.\n\
+MINIBUF neither nil nor t means never include the minibuffer window.")
+ (frame, minibuf, window)
+ Lisp_Object frame, minibuf, window;
+{
+
+ if (NILP (window))
+ window = selected_window;
+ if (NILP (frame))
+ frame = selected_frame;
+
+ if (!EQ (frame, XWINDOW (window)->frame))
+ error ("Window is on a different frame");
+
+ return window_list_1 (window, minibuf, frame);
+}
+
+
+/* Return a list of windows in canonical ordering. Arguments are like
+ for `next-window'. */
+
+static Lisp_Object
+window_list_1 (window, minibuf, all_frames)
Lisp_Object window, minibuf, all_frames;
{
Lisp_Object tail, list;
Qnil, look at just the selected frame;
Qvisible, look at visible frames;
a frame, just look at windows on that frame.
- If MINI is non-zero, perform the operation on minibuffer windows too.
-*/
+ If MINI is non-zero, perform the operation on minibuffer windows too. */
enum window_loop
{
We can't just wait until we hit the first window again, because
it might be deleted. */
- windows = Fwindow_list (window, mini ? Qt : Qnil, frame_arg);
+ windows = window_list_1 (window, mini ? Qt : Qnil, frame_arg);
GCPRO1 (windows);
best_window = Qnil;
case GET_LARGEST_WINDOW:
{
- struct window *b;
-
/* Ignore dedicated windows and minibuffers. */
- if (MINI_WINDOW_P (w)
- || !NILP (w->dedicated)
- || NILP (best_window))
+ if (MINI_WINDOW_P (w) || !NILP (w->dedicated))
break;
- b = XWINDOW (best_window);
- if (NILP (best_window)
- || (XFASTINT (w->height) * XFASTINT (w->width)
- > (XFASTINT (b->height) * XFASTINT (b->width))))
+ if (NILP (best_window))
best_window = window;
+ else
+ {
+ struct window *b = XWINDOW (best_window);
+ if (XFASTINT (w->height) * XFASTINT (w->width)
+ > XFASTINT (b->height) * XFASTINT (b->width))
+ best_window = window;
+ }
}
break;
&& NILP (XBUFFER (w->buffer)->name))
abort ();
break;
+
+ case WINDOW_LOOP_UNUSED:
+ break;
}
}
{
struct window *w;
int startpos;
- int top;
+ int top, new_top;
if (NILP (window))
window = selected_window;
else
CHECK_LIVE_WINDOW (window, 0);
-
w = XWINDOW (window);
startpos = marker_position (w->start);
on the frame. But don't try to do this if the window start is
outside the visible portion (as might happen when the display is
not current, due to typeahead). */
- if (startpos >= BUF_BEGV (XBUFFER (w->buffer))
+ new_top = XFASTINT (w->top) - FRAME_TOP_MARGIN (XFRAME (WINDOW_FRAME (w)));
+ if (new_top != top
+ && startpos >= BUF_BEGV (XBUFFER (w->buffer))
&& startpos <= BUF_ZV (XBUFFER (w->buffer)))
{
struct position pos;
pos = *vmotion (startpos, -top, w);
set_marker_both (w->start, w->buffer, pos.bufpos, pos.bytepos);
+ w->window_end_valid = Qnil;
w->start_at_line_beg = ((pos.bytepos == BEGV_BYTE
|| FETCH_BYTE (pos.bytepos - 1) == '\n') ? Qt
: Qnil);
int old_size, min_size;
check_min_window_sizes ();
+ size = max (0, size);
/* If the window has been "too small" at one point,
don't delete it for being "too small" in the future.
Preserve it as long as that is at all possible. */
if (width_p)
{
- old_size = XFASTINT (w->width);
+ old_size = XINT (w->width);
min_size = window_min_width;
}
else
{
- old_size = XFASTINT (w->height);
+ old_size = XINT (w->height);
min_size = window_min_height;
}
- if (old_size < window_min_width)
+ if (old_size < min_size)
w->too_small_ok = Qt;
/* Maybe delete WINDOW if it's too small. */
if (!nodelete_p && !NILP (w->parent))
{
- int min_size;
-
if (!MINI_WINDOW_P (w) && !NILP (w->too_small_ok))
min_size = width_p ? MIN_SAFE_WINDOW_WIDTH : MIN_SAFE_WINDOW_HEIGHT;
else
}
/* Set redisplay hints. */
- XSETFASTINT (w->last_modified, 0);
- XSETFASTINT (w->last_overlay_modified, 0);
+ w->last_modified = make_number (0);
+ w->last_overlay_modified = make_number (0);
windows_or_buffers_changed++;
- FRAME_WINDOW_SIZES_CHANGED (XFRAME (WINDOW_FRAME (w))) = 1;
+ FRAME_WINDOW_SIZES_CHANGED (XFRAME (w->frame)) = 1;
if (width_p)
{
sideward = &w->vchild;
forward = &w->hchild;
- XSETFASTINT (w->width, size);
+ w->width = make_number (size);
}
else
{
sideward = &w->hchild;
forward = &w->vchild;
- XSETFASTINT (w->height, size);
+ w->height = make_number (size);
}
if (!NILP (*sideward))
{
int fixed_size, each, extra, n;
int resize_fixed_p, nfixed;
- int last_pos, first_pos, nchildren;
+ int last_pos, first_pos, nchildren, total;
/* Determine the fixed-size portion of the this window, and the
number of child windows. */
- fixed_size = nchildren = nfixed = 0;
+ fixed_size = nchildren = nfixed = total = 0;
for (child = *forward; !NILP (child); child = c->next, ++nchildren)
{
+ int child_size;
+
c = XWINDOW (child);
+ child_size = width_p ? XINT (c->width) : XINT (c->height);
+ total += child_size;
+
if (window_fixed_size_p (c, width_p, 0))
{
- fixed_size += (width_p
- ? XFASTINT (c->width) : XFASTINT (c->height));
+ fixed_size += child_size;
++nfixed;
}
}
/* Compute how many lines/columns to add to each child. The
value of extra takes care of rounding errors. */
n = resize_fixed_p ? nchildren : nchildren - nfixed;
- each = (size - old_size) / n;
- extra = (size - old_size) - n * each;
+ each = (size - total) / n;
+ extra = (size - total) - n * each;
/* Compute new children heights and edge positions. */
- first_pos = width_p ? XFASTINT (w->left) : XFASTINT (w->top);
+ first_pos = width_p ? XINT (w->left) : XINT (w->top);
last_pos = first_pos;
for (child = *forward; !NILP (child); child = c->next)
{
{
int child_size;
c = XWINDOW (child);
- child_size = width_p ? XFASTINT (c->width) : XFASTINT (c->height);
+ child_size = width_p ? XINT (c->width) : XINT (c->height);
size_window (child, child_size, width_p, 0);
}
}
bzero (&w->last_cursor, sizeof w->last_cursor);
w->window_end_valid = Qnil;
XSETFASTINT (w->hscroll, 0);
+ XSETFASTINT (w->min_hscroll, 0);
set_marker_both (w->pointm, buffer, BUF_PT (b), BUF_PT_BYTE (b));
set_marker_restricted (w->start,
make_number (b->last_window_start),
argument NOT-THIS-WINDOW is non-nil (interactively, with prefix arg).\n\
If `pop-up-frames' is non-nil, make a new frame if no window shows BUFFER.\n\
Returns the window displaying BUFFER.\n\
+If `display-reuse-frames' is non-nil, and another frame is currently\n\
+displaying BUFFER, then simply raise that frame.\n\
\n\
The variables `special-display-buffer-names', `special-display-regexps',\n\
`same-window-buffer-names', and `same-window-regexps' customize how certain\n\
If FRAME is a frame, search only that frame.\n\
If FRAME is nil, search only the selected frame\n\
(actually the last nonminibuffer frame),\n\
- unless `pop-up-frames' is non-nil,\n\
- which means search visible and iconified frames.")
+ unless `pop-up-frames' or `display-buffer-reuse-frames' is non-nil,\n\
+ which means search visible and iconified frames.\n\
+\n\
+If `even-window-heights' is non-nil, window heights will be evened out\n\
+if displaying the buffer causes two vertically adjacent windows to be\n\
+displayed.")
(buffer, not_this_window, frame)
register Lisp_Object buffer, not_this_window, frame;
{
}
}
- /* If pop_up_frames,
+ /* If the user wants pop-up-frames or display-reuse-frames, then
look for a window showing BUFFER on any visible or iconified frame.
Otherwise search only the current frame. */
if (! NILP (frame))
tem = frame;
- else if (pop_up_frames || last_nonminibuf_frame == 0)
+ else if (pop_up_frames
+ || display_buffer_reuse_frames
+ || last_nonminibuf_frame == 0)
XSETFASTINT (tem, 0);
else
XSETFRAME (tem, last_nonminibuf_frame);
+
window = Fget_buffer_window (buffer, tem);
if (!NILP (window)
&& (NILP (not_this_window) || !EQ (window, selected_window)))
- {
- return display_buffer_1 (window);
- }
+ return display_buffer_1 (window);
/* Certain buffer names get special handling. */
if (!NILP (Vspecial_display_function) && NILP (swp))
if (!NILP (XWINDOW (window)->next))
other = lower = XWINDOW (window)->next, upper = window;
if (!NILP (other)
+ && !NILP (Veven_window_heights)
/* Check that OTHER and WINDOW are vertically arrayed. */
&& !EQ (XWINDOW (other)->top, XWINDOW (window)->top)
&& (XFASTINT (XWINDOW (other)->height)
Vminibuf_scroll_window = window;
w = XWINDOW (window);
XSETFASTINT (w->hscroll, 0);
+ XSETFASTINT (w->min_hscroll, 0);
set_marker_restricted_both (w->start, buf, 1, 1);
set_marker_restricted_both (w->pointm, buf, 1, 1);
Lisp_Object last_child;
int delta = old_height - height;
int last_top;
+
+ last_child = Qnil;
/* Find the last child. We are taking space from lowest windows
first, so we iterate over children from the last child
Lisp_Object tem;
int this_scroll_margin;
int preserve_y;
+ /* True if we fiddled the window vscroll field without really scrolling. */
+ int vscrolled = 0;
SET_TEXT_POS_FROM_MARKER (start, w->start);
/* If PT is not visible in WINDOW, move back one half of
the screen. */
- XSETFASTINT (tem, PT);
- tem = Fpos_visible_in_window_p (tem, window);
+ tem = Fpos_visible_in_window_p (make_number (PT), window, Qnil);
if (NILP (tem))
{
/* Move backward half the height of the window. Performance note:
int screen_full = (it.last_visible_y
- next_screen_context_lines * CANON_Y_UNIT (it.f));
int direction = n < 0 ? -1 : 1;
- move_it_vertically (&it, direction * screen_full);
+ int dy = direction * screen_full;
+
+ /* Note that move_it_vertically always moves the iterator to the
+ start of a line. So, if the last line doesn't have a newline,
+ we would end up at the start of the line ending at ZV. */
+ if (dy <= 0)
+ move_it_vertically_backward (&it, -dy);
+ else if (dy > 0)
+ move_it_to (&it, ZV, -1, it.current_y + dy, -1,
+ MOVE_TO_POS | MOVE_TO_Y);
}
else
move_it_by_lines (&it, n, 1);
if ((n > 0 && IT_CHARPOS (it) == ZV)
|| (n < 0 && IT_CHARPOS (it) == CHARPOS (start)))
{
- if (noerror)
- return;
- else if (IT_CHARPOS (it) == ZV)
- Fsignal (Qend_of_buffer, Qnil);
+ if (IT_CHARPOS (it) == ZV)
+ {
+ if (it.current_y + it.max_ascent + it.max_descent
+ > it.last_visible_y)
+ {
+ /* The last line was only partially visible, make it fully
+ visible. */
+ w->vscroll = (it.last_visible_y
+ - it.current_y + it.max_ascent + it.max_descent);
+ adjust_glyphs (it.f);
+ }
+ else if (noerror)
+ return;
+ else
+ Fsignal (Qend_of_buffer, Qnil);
+ }
else
- Fsignal (Qbeginning_of_buffer, Qnil);
+ {
+ if (w->vscroll != 0)
+ /* The first line was only partially visible, make it fully
+ visible. */
+ w->vscroll = 0;
+ else if (noerror)
+ return;
+ else
+ Fsignal (Qbeginning_of_buffer, Qnil);
+ }
+
+ /* If control gets here, then we vscrolled. */
+
+ XBUFFER (w->buffer)->prevent_redisplay_optimizations_p = 1;
+
+ /* Don't try to change the window start below. */
+ vscrolled = 1;
}
- /* Set the window start, and set up the window for redisplay. */
- set_marker_restricted (w->start, make_number (IT_CHARPOS (it)), w->buffer);
- w->start_at_line_beg = Fbolp ();
- w->update_mode_line = Qt;
- XSETFASTINT (w->last_modified, 0);
- XSETFASTINT (w->last_overlay_modified, 0);
- /* Set force_start so that redisplay_window will run the
- window-scroll-functions. */
- w->force_start = Qt;
+ if (! vscrolled)
+ {
+ /* Set the window start, and set up the window for redisplay. */
+ set_marker_restricted (w->start, make_number (IT_CHARPOS (it)),
+ w->buffer);
+ w->start_at_line_beg = Fbolp ();
+ w->update_mode_line = Qt;
+ XSETFASTINT (w->last_modified, 0);
+ XSETFASTINT (w->last_overlay_modified, 0);
+ /* Set force_start so that redisplay_window will run the
+ window-scroll-functions. */
+ w->force_start = Qt;
+ }
it.current_y = it.vpos = 0;
}
else if (n < 0)
{
+ int charpos, bytepos;
+
/* We moved the window start towards BEGV, so PT may be now
in the scroll margin at the bottom. */
move_it_to (&it, PT, -1,
it.last_visible_y - this_scroll_margin - 1, -1,
MOVE_TO_POS | MOVE_TO_Y);
+
+ /* Save our position, in case it's correct. */
+ charpos = IT_CHARPOS (it);
+ bytepos = IT_BYTEPOS (it);
- /* Don't put point on a partially visible line at the end. */
- if (it.current_y + it.max_ascent + it.max_descent
- > it.last_visible_y)
- move_it_by_lines (&it, -1, 0);
-
- SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it));
+ /* See if point is on a partially visible line at the end. */
+ move_it_by_lines (&it, 1, 1);
+ if (it.current_y > it.last_visible_y)
+ /* The last line was only partially visible, so back up two
+ lines to make sure we're on a fully visible line. */
+ {
+ move_it_by_lines (&it, -2, 0);
+ SET_PT_BOTH (IT_CHARPOS (it), IT_BYTEPOS (it));
+ }
+ else
+ /* No, the position we saved is OK, so use it. */
+ SET_PT_BOTH (charpos, bytepos);
}
}
}
original_vpos = posit.vpos;
XSETFASTINT (tem, PT);
- tem = Fpos_visible_in_window_p (tem, window);
+ tem = Fpos_visible_in_window_p (tem, window, Qnil);
if (NILP (tem))
{
(arg)
register Lisp_Object arg;
{
-
+ Lisp_Object result;
+ int hscroll;
+ struct window *w = XWINDOW (selected_window);
+
if (NILP (arg))
- XSETFASTINT (arg, window_internal_width (XWINDOW (selected_window)) - 2);
+ XSETFASTINT (arg, window_internal_width (w) - 2);
else
arg = Fprefix_numeric_value (arg);
- return
- Fset_window_hscroll (selected_window,
- make_number (XINT (XWINDOW (selected_window)->hscroll)
- + XINT (arg)));
+ hscroll = XINT (w->hscroll) + XINT (arg);
+ result = Fset_window_hscroll (selected_window, make_number (hscroll));
+
+ if (!NILP (Finteractive_p ()))
+ w->min_hscroll = w->hscroll;
+
+ return result;
}
DEFUN ("scroll-right", Fscroll_right, Sscroll_right, 0, 1, "P",
(arg)
register Lisp_Object arg;
{
+ Lisp_Object result;
+ int hscroll;
+ struct window *w = XWINDOW (selected_window);
+
if (NILP (arg))
- XSETFASTINT (arg, window_internal_width (XWINDOW (selected_window)) - 2);
+ XSETFASTINT (arg, window_internal_width (w) - 2);
else
arg = Fprefix_numeric_value (arg);
- return
- Fset_window_hscroll (selected_window,
- make_number (XINT (XWINDOW (selected_window)->hscroll)
- - XINT (arg)));
+ hscroll = XINT (w->hscroll) - XINT (arg);
+ result = Fset_window_hscroll (selected_window, make_number (hscroll));
+
+ if (!NILP (Finteractive_p ()))
+ w->min_hscroll = w->hscroll;
+
+ return result;
}
+/* Value is the number of lines actually displayed in window W,
+ as opposed to its height. */
+
+static int
+displayed_window_lines (w)
+ struct window *w;
+{
+ struct it it;
+ struct text_pos start;
+ int height = window_box_height (w);
+ struct buffer *old_buffer;
+ int bottom_y;
+
+ if (XBUFFER (w->buffer) != current_buffer)
+ {
+ old_buffer = current_buffer;
+ set_buffer_internal (XBUFFER (w->buffer));
+ }
+ else
+ old_buffer = NULL;
+
+ SET_TEXT_POS_FROM_MARKER (start, w->start);
+ start_display (&it, w, start);
+ move_it_vertically (&it, height);
+
+ if (old_buffer)
+ set_buffer_internal (old_buffer);
+
+ bottom_y = it.current_y + it.max_ascent + it.max_descent;
+
+ if (bottom_y > it.current_y && bottom_y <= it.last_visible_y)
+ /* Hit a line without a terminating newline. */
+ it.vpos++;
+
+ /* Add in empty lines at the bottom of the window. */
+ if (bottom_y < height)
+ {
+ struct frame *f = XFRAME (w->frame);
+ int rest = height - bottom_y;
+ int lines = rest / CANON_Y_UNIT (f);
+ it.vpos += lines;
+ }
+
+ return it.vpos;
+}
+
+
DEFUN ("recenter", Frecenter, Srecenter, 0, 1, "P",
- "Center point in window and redisplay frame. With ARG, put point on line ARG.\n\
-The desired position of point is always relative to the current window.\n\
-Just C-u as prefix means put point in the center of the window.\n\
-If ARG is omitted or nil, erases the entire frame and then\n\
-redraws with point in the center of the current window.")
+ "Center point in window and redisplay frame.\n\
+With prefix argument ARG, recenter putting point on screen line ARG\n\
+relative to the current window. If ARG is negative, it counts up from the\n\
+bottom of the window. (ARG should be less than the height of the window.)\n\
+\n\
+If ARG is omitted or nil, erase the entire frame and then\n\
+redraw with point in the center of the current window.\n\
+Just C-u as prefix means put point in the center of the window\n\
+and redisplay normally--don't erase and redraw the frame.")
(arg)
register Lisp_Object arg;
{
- register struct window *w = XWINDOW (selected_window);
- register int ht = window_internal_height (w);
- struct position pos;
+ struct window *w = XWINDOW (selected_window);
struct buffer *buf = XBUFFER (w->buffer);
struct buffer *obuf = current_buffer;
+ int center_p = 0;
+ int charpos, bytepos;
if (NILP (arg))
{
- extern int frame_garbaged;
int i;
/* Invalidate pixel data calculated for all compositions. */
Fredraw_frame (w->frame);
SET_FRAME_GARBAGED (XFRAME (WINDOW_FRAME (w)));
- XSETFASTINT (arg, ht / 2);
+ center_p = 1;
}
else if (CONSP (arg)) /* Just C-u. */
- {
- XSETFASTINT (arg, ht / 2);
- }
+ center_p = 1;
else
{
arg = Fprefix_numeric_value (arg);
CHECK_NUMBER (arg, 0);
}
- if (XINT (arg) < 0)
- XSETINT (arg, XINT (arg) + ht);
-
set_buffer_internal (buf);
- pos = *vmotion (PT, - XINT (arg), w);
- set_marker_both (w->start, w->buffer, pos.bufpos, pos.bytepos);
- w->start_at_line_beg = ((pos.bytepos == BEGV_BYTE
- || FETCH_BYTE (pos.bytepos - 1) == '\n')
- ? Qt : Qnil);
+ /* Handle centering on a gfaphical frame specially. Such frames can
+ have variable-height lines and centering point on the basis of
+ line counts would lead to strange effects. */
+ if (center_p && FRAME_WINDOW_P (XFRAME (w->frame)))
+ {
+ struct it it;
+ struct text_pos pt;
+
+ SET_TEXT_POS (pt, PT, PT_BYTE);
+ start_display (&it, w, pt);
+ move_it_vertically (&it, - it.last_visible_y / 2);
+ charpos = IT_CHARPOS (it);
+ bytepos = IT_BYTEPOS (it);
+ }
+ else
+ {
+ struct position pos;
+
+ if (center_p)
+ {
+ int ht = displayed_window_lines (w);
+ arg = make_number (ht / 2);
+ }
+ else if (XINT (arg) < 0)
+ {
+ int ht = displayed_window_lines (w);
+ XSETINT (arg, XINT (arg) + ht);
+ }
+
+ pos = *vmotion (PT, - XINT (arg), w);
+ charpos = pos.bufpos;
+ bytepos = pos.bytepos;
+ }
+
+ /* Set the new window start. */
+ set_marker_both (w->start, w->buffer, charpos, bytepos);
+ w->window_end_valid = Qnil;
w->force_start = Qt;
+ if (bytepos == BEGV_BYTE || FETCH_BYTE (bytepos - 1) == '\n')
+ w->start_at_line_beg = Qt;
+ else
+ w->start_at_line_beg = Qnil;
+
set_buffer_internal (obuf);
-
return Qnil;
}
-/* Value is the number of lines actually displayed in window W,
- as opposed to its height. */
-
-static int
-displayed_window_lines (w)
- struct window *w;
+DEFUN ("window-text-height", Fwindow_text_height, Swindow_text_height,
+ 0, 1, 0,
+ "Return the height in lines of the text display area of WINDOW.\n\
+This doesn't include the mode-line (or header-line if any) or any\n\
+partial-height lines in the text display area.")
+ (window)
+ Lisp_Object window;
{
- struct it it;
- struct text_pos start;
- int height = window_box_height (w);
-
- SET_TEXT_POS_FROM_MARKER (start, w->start);
- start_display (&it, w, start);
- move_it_vertically (&it, height);
-
- /* Add in empty lines at the bottom of the window. */
- if (it.current_y < height)
- {
- struct frame *f = XFRAME (w->frame);
- int rest = height - it.current_y;
- int lines = (rest + CANON_Y_UNIT (f) - 1) / CANON_Y_UNIT (f);
- it.vpos += lines;
- }
-
- return it.vpos;
+ struct window *w = decode_window (window);
+ int pixel_height = window_box_height (w);
+ int line_height = pixel_height / CANON_Y_UNIT (XFRAME (w->frame));
+ return make_number (line_height);
}
XSETINT (arg, XINT (arg) + lines);
}
+ if (w->vscroll)
+ /* Skip past a partially visible first line. */
+ XSETINT (arg, XINT (arg) + 1);
+
return Fvertical_motion (arg, window);
}
/* This is saved as a Lisp_Vector */
struct saved_window
- {
- /* these first two must agree with struct Lisp_Vector in lisp.h */
- EMACS_INT size_from_Lisp_Vector_struct;
- struct Lisp_Vector *next_from_Lisp_Vector_struct;
+{
+ /* these first two must agree with struct Lisp_Vector in lisp.h */
+ EMACS_INT size_from_Lisp_Vector_struct;
+ struct Lisp_Vector *next_from_Lisp_Vector_struct;
- Lisp_Object window;
- Lisp_Object buffer, start, pointm, mark;
- Lisp_Object left, top, width, height, hscroll;
- Lisp_Object parent, prev;
- Lisp_Object start_at_line_beg;
- Lisp_Object display_table;
- };
-#define SAVED_WINDOW_VECTOR_SIZE 14 /* Arg to Fmake_vector */
+ Lisp_Object window;
+ Lisp_Object buffer, start, pointm, mark;
+ Lisp_Object left, top, width, height, hscroll, min_hscroll;
+ Lisp_Object parent, prev;
+ Lisp_Object start_at_line_beg;
+ Lisp_Object display_table;
+ Lisp_Object orig_top, orig_height;
+};
+
+#define SAVED_WINDOW_VECTOR_SIZE 17 /* Arg to Fmake_vector */
#define SAVED_WINDOW_N(swv,n) \
((struct saved_window *) (XVECTOR ((swv)->contents[(n)])))
{
if (XBUFFER (new_current_buffer) == current_buffer)
old_point = PT;
-
}
frame = XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame;
f = XFRAME (frame);
-
+
/* If f is a dead frame, don't bother rebuilding its window tree.
However, there is other stuff we should still try to do below. */
if (FRAME_LIVE_P (f))
struct window *root_window;
struct window **leaf_windows;
int n_leaf_windows;
- int k, i;
+ int k, i, n;
/* If the frame has been resized since this window configuration was
made, we change the frame to the size specified in the
w->width = p->width;
w->height = p->height;
w->hscroll = p->hscroll;
+ w->min_hscroll = p->min_hscroll;
w->display_table = p->display_table;
+ w->orig_top = p->orig_top;
+ w->orig_height = p->orig_height;
XSETFASTINT (w->last_modified, 0);
XSETFASTINT (w->last_overlay_modified, 0);
#endif
/* Now, free glyph matrices in windows that were not reused. */
- for (i = 0; i < n_leaf_windows; ++i)
- if (NILP (leaf_windows[i]->buffer))
- {
- /* Assert it's not reused as a combination. */
- xassert (NILP (leaf_windows[i]->hchild)
- && NILP (leaf_windows[i]->vchild));
- free_window_matrices (leaf_windows[i]);
- SET_FRAME_GARBAGED (f);
- }
+ for (i = n = 0; i < n_leaf_windows; ++i)
+ {
+ if (NILP (leaf_windows[i]->buffer))
+ {
+ /* Assert it's not reused as a combination. */
+ xassert (NILP (leaf_windows[i]->hchild)
+ && NILP (leaf_windows[i]->vchild));
+ free_window_matrices (leaf_windows[i]);
+ }
+ else if (EQ (leaf_windows[i]->buffer, new_current_buffer))
+ ++n;
+ }
+
+ /* If more than one window shows the new and old current buffer,
+ don't try to preserve point in that buffer. */
+ if (old_point > 0 && n > 1)
+ old_point = -1;
adjust_glyphs (f);
p->width = w->width;
p->height = w->height;
p->hscroll = w->hscroll;
+ p->min_hscroll = w->min_hscroll;
p->display_table = w->display_table;
+ p->orig_top = w->orig_top;
+ p->orig_height = w->orig_height;
if (!NILP (w->buffer))
{
/* Save w's value of point in the window configuration.
for (i = 0; i < n_windows; i++)
XVECTOR (tem)->contents[i]
= Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE), Qnil);
- save_window_save (FRAME_ROOT_WINDOW (f),
- XVECTOR (tem), 0);
+ save_window_save (FRAME_ROOT_WINDOW (f), XVECTOR (tem), 0);
XSETWINDOW_CONFIGURATION (tem, data);
return (tem);
}
struct frame *f;
int freeze_p;
{
- foreach_window (f, freeze_window_start, (void *) freeze_p);
+ foreach_window (f, freeze_window_start, (void *) (freeze_p ? f : 0));
}
\f
{
if (! EQ (p1->hscroll, p2->hscroll))
return 0;
+ if (!EQ (p1->min_hscroll, p2->min_hscroll))
+ return 0;
if (! EQ (p1->start_at_line_beg, p2->start_at_line_beg))
return 0;
if (NILP (Fequal (p1->start, p2->start)))
work using this function.");
Vdisplay_buffer_function = Qnil;
+ DEFVAR_LISP ("even-window-heights", &Veven_window_heights,
+ "*If non-nil, `display-buffer' should even the window heights.\n\
+If nil, `display-buffer' will leave the window configuration alone.");
+ Veven_window_heights = Qt;
+
DEFVAR_LISP ("minibuffer-scroll-window", &Vminibuf_scroll_window,
"Non-nil means it is the window that C-M-v in minibuffer should scroll.");
Vminibuf_scroll_window = Qnil;
"*Non-nil means `display-buffer' should make a separate frame.");
pop_up_frames = 0;
+ DEFVAR_BOOL ("display-buffer-reuse-frames", &display_buffer_reuse_frames,
+ "*Non-nil means `display-buffer' should reuse frames.\n\
+If the buffer in question is already displayed in a frame, raise that frame.");
+ display_buffer_reuse_frames = 0;
+
DEFVAR_LISP ("pop-up-frame-function", &Vpop_up_frame_function,
"Function to call to handle automatic new frame creation.\n\
It is called with no arguments and should return a newly created frame.\n\
defsubr (&Sother_window_for_scrolling);
defsubr (&Sscroll_other_window);
defsubr (&Srecenter);
+ defsubr (&Swindow_text_height);
defsubr (&Smove_to_window_line);
defsubr (&Swindow_configuration_p);
defsubr (&Swindow_configuration_frame);
HCoop / bpt / emacs.git / blobdiff