/* Window creation, deletion and examination for GNU Emacs.
Does not include redisplay.
- Copyright (C) 1985,86,87, 1993,94,95,96,97,98, 2000,01,02,03,04
- Free Software Foundation, Inc.
+ Copyright (C) 1985, 1986, 1987, 1993, 1994, 1995, 1996, 1997, 1998, 2000,
+ 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
This file is part of GNU Emacs.
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include <config.h>
#include "lisp.h"
void *));
static Lisp_Object window_list_1 P_ ((Lisp_Object, Lisp_Object, Lisp_Object));
-/* The value of `window-size-fixed'. */
-
-int window_size_fixed;
-
/* This is the window in which the terminal's cursor should
be left when nothing is being done with it. This must
always be a leaf window, and its buffer is selected by
p->fringes_outside_margins = Qnil;
p->scroll_bar_width = Qnil;
p->vertical_scroll_bar_type = Qt;
- p->overlay_arrow_bitmap = 0;
Vwindow_list = Qnil;
return val;
+ WINDOW_LEFT_FRINGE_COLS (w)),
make_number (WINDOW_TOP_EDGE_LINE (w)
+ WINDOW_HEADER_LINE_LINES (w)),
- make_number (WINDOW_RIGHT_EDGE_COL (w)
+ make_number (WINDOW_BOX_RIGHT_EDGE_COL (w)
- WINDOW_RIGHT_MARGIN_COLS (w)
- WINDOW_RIGHT_FRINGE_COLS (w)),
make_number (WINDOW_BOTTOM_EDGE_LINE (w)
+ WINDOW_LEFT_FRINGE_WIDTH (w)),
make_number (WINDOW_TOP_EDGE_Y (w)
+ WINDOW_HEADER_LINE_HEIGHT (w)),
- make_number (WINDOW_RIGHT_EDGE_X (w)
+ make_number (WINDOW_BOX_RIGHT_EDGE_X (w)
- WINDOW_RIGHT_MARGIN_WIDTH (w)
- WINDOW_RIGHT_FRINGE_WIDTH (w)),
make_number (WINDOW_BOTTOM_EDGE_Y (w)
tem = par->hchild;
if (NILP (tem))
tem = par->vchild;
- if (NILP (XWINDOW (tem)->next))
+ if (NILP (XWINDOW (tem)->next)) {
replace_window (parent, tem);
+ par = XWINDOW (tem);
+ }
/* Since we may be deleting combination windows, we must make sure that
not only p but all its children have been marked as deleted. */
/* Mark this window as deleted. */
p->buffer = p->hchild = p->vchild = Qnil;
+ if (! NILP (par->parent))
+ par = XWINDOW (par->parent);
+
+ /* Check if we have a v/hchild with a v/hchild. In that case remove
+ one of them. */
+
+ if (! NILP (par->vchild) && ! NILP (XWINDOW (par->vchild)->vchild))
+ {
+ p = XWINDOW (par->vchild);
+ par->vchild = p->vchild;
+ tem = p->vchild;
+ }
+ else if (! NILP (par->hchild) && ! NILP (XWINDOW (par->hchild)->hchild))
+ {
+ p = XWINDOW (par->hchild);
+ par->hchild = p->hchild;
+ tem = p->hchild;
+ }
+ else
+ p = 0;
+
+ if (p)
+ {
+ while (! NILP (tem)) {
+ XWINDOW (tem)->parent = p->parent;
+ if (NILP (XWINDOW (tem)->next))
+ break;
+ tem = XWINDOW (tem)->next;
+ }
+ if (! NILP (tem)) {
+ /* The next of the v/hchild we are removing is now the next of the
+ last child for the v/hchild:
+ Before v/hchild -> v/hchild -> next1 -> next2
+ |
+ -> next3
+ After: v/hchild -> next1 -> next2 -> next3
+ */
+ XWINDOW (tem)->next = p->next;
+ if (! NILP (p->next))
+ XWINDOW (p->next)->prev = tem;
+ }
+ p->next = p->prev = p->vchild = p->hchild = p->buffer = Qnil;
+ }
+
+
/* Adjust glyph matrices. */
adjust_glyphs (f);
UNBLOCK_INPUT;
so that FRAME_FOCUS_FRAME is moved appropriately as we
move around in the state where a minibuffer in a separate
frame is active. */
- Fselect_frame (WINDOW_FRAME (w), Qnil);
+ Fselect_frame (WINDOW_FRAME (w));
}
else
sf->selected_window = window;
DEFUN ("special-display-p", Fspecial_display_p, Sspecial_display_p, 1, 1, 0,
doc: /* Returns non-nil if a buffer named BUFFER-NAME gets a special frame.
-If the value is t, a frame would be created for that buffer
-using the default frame parameters. If the value is a list,
-it is a list of frame parameters that would be used
+If the value is t, `display-buffer' or `pop-to-buffer' would create a
+special frame for that buffer using the default frame parameters.
+
+If the value is a list, it is a list of frame parameters that would be used
to make a frame for that buffer.
The variables `special-display-buffer-names'
and `special-display-regexps' control this. */)
}
DEFUN ("same-window-p", Fsame_window_p, Ssame_window_p, 1, 1, 0,
- doc: /* Returns non-nil if a new buffer named BUFFER-NAME would use the same window.
+ doc: /* Returns non-nil if a buffer named BUFFER-NAME would use the same window.
+More precisely, if `display-buffer' or `pop-to-buffer' would display
+that buffer in the selected window rather than (as usual) in some other window.
See `same-window-buffer-names' and `same-window-regexps'. */)
(buffer_name)
Lisp_Object buffer_name;
The number of children n equals the number of resizable
children of this window + 1 because we know window itself
- is resizable (otherwise we would have signalled an error. */
+ is resizable (otherwise we would have signalled an error). */
struct window *w = XWINDOW (window);
Lisp_Object s;
/* We moved the window start towards ZV, so PT may be now
in the scroll margin at the top. */
move_it_to (&it, PT, -1, -1, -1, MOVE_TO_POS);
- if (IT_CHARPOS (it) == PT && it.current_y >= this_scroll_margin)
+ if (IT_CHARPOS (it) == PT && it.current_y >= this_scroll_margin
+ && (NILP (Vscroll_preserve_screen_position)
+ || EQ (Vscroll_preserve_screen_position, Qt)))
/* We found PT at a legitimate height. Leave it alone. */
;
else if (preserve_y >= 0)
/* 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,
+ (it.last_visible_y - CURRENT_HEADER_LINE_HEIGHT (w)
+ - this_scroll_margin - 1),
+ -1,
MOVE_TO_POS | MOVE_TO_Y);
/* Save our position, in case it's correct. */
partial_p = it.current_y > it.last_visible_y;
}
- if (charpos == PT && !partial_p)
+ if (charpos == PT && !partial_p
+ && (NILP (Vscroll_preserve_screen_position)
+ || EQ (Vscroll_preserve_screen_position, Qt)))
/* We found PT before we found the display margin, so PT is ok. */
;
else if (preserve_y >= 0)
the window-scroll-functions. */
w->force_start = Qt;
- if (whole && !NILP (Vscroll_preserve_screen_position))
+ if (!NILP (Vscroll_preserve_screen_position)
+ && (whole || !EQ (Vscroll_preserve_screen_position, Qt)))
{
SET_PT_BOTH (pos, pos_byte);
Fvertical_motion (make_number (original_vpos), window);
struct buffer *obuf = current_buffer;
int center_p = 0;
int charpos, bytepos;
+ int iarg;
+ int this_scroll_margin;
/* If redisplay is suppressed due to an error, try again. */
obuf->display_error_modiff = 0;
{
arg = Fprefix_numeric_value (arg);
CHECK_NUMBER (arg);
+ iarg = XINT (arg);
}
set_buffer_internal (buf);
+ /* Do this after making BUF current
+ in case scroll_margin is buffer-local. */
+ this_scroll_margin = max (0, scroll_margin);
+ this_scroll_margin = min (this_scroll_margin,
+ XFASTINT (w->total_lines) / 4);
+
/* Handle centering on a graphical frame specially. Such frames can
have variable-height lines and centering point on the basis of
line counts would lead to strange effects. */
charpos = IT_CHARPOS (it);
bytepos = IT_BYTEPOS (it);
}
- else if (XINT (arg) < 0)
+ else if (iarg < 0)
{
struct it it;
struct text_pos pt;
- int nlines = - XINT (arg);
+ int nlines = -iarg;
int extra_line_spacing;
int h = window_box_height (w);
+ iarg = - max (-iarg, this_scroll_margin);
+
SET_TEXT_POS (pt, PT, PT_BYTE);
start_display (&it, w, pt);
else
{
struct position pos;
- pos = *vmotion (PT, - XINT (arg), w);
+
+ iarg = max (iarg, this_scroll_margin);
+
+ pos = *vmotion (PT, -iarg, w);
charpos = pos.bufpos;
bytepos = pos.bytepos;
}
int ht = window_internal_height (w);
if (center_p)
- arg = make_number (ht / 2);
- else if (XINT (arg) < 0)
- arg = make_number (XINT (arg) + ht);
+ iarg = ht / 2;
+ else if (iarg < 0)
+ iarg += ht;
- pos = *vmotion (PT, - XINT (arg), w);
+ /* Don't let it get into the margin at either top or bottom. */
+ iarg = max (iarg, this_scroll_margin);
+ iarg = min (iarg, ht - this_scroll_margin - 1);
+
+ pos = *vmotion (PT, - iarg, w);
charpos = pos.bufpos;
bytepos = pos.bytepos;
}
struct window *w = XWINDOW (selected_window);
int lines, start;
Lisp_Object window;
+#if 0
+ int this_scroll_margin;
+#endif
window = selected_window;
start = marker_position (w->start);
Fgoto_char (w->start);
lines = displayed_window_lines (w);
+
+#if 0
+ this_scroll_margin = max (0, scroll_margin);
+ this_scroll_margin = min (this_scroll_margin, lines / 4);
+#endif
+
if (NILP (arg))
XSETFASTINT (arg, lines / 2);
else
{
- arg = Fprefix_numeric_value (arg);
- if (XINT (arg) < 0)
- XSETINT (arg, XINT (arg) + lines);
+ int iarg = XINT (Fprefix_numeric_value (arg));
+
+ if (iarg < 0)
+ iarg = iarg + lines;
+
+#if 0 /* This code would prevent move-to-window-line from moving point
+ to a place inside the scroll margins (which would cause the
+ next redisplay to scroll). I wrote this code, but then concluded
+ it is probably better not to install it. However, it is here
+ inside #if 0 so as not to lose it. -- rms. */
+
+ /* Don't let it get into the margin at either top or bottom. */
+ iarg = max (iarg, this_scroll_margin);
+ iarg = min (iarg, lines - this_scroll_margin - 1);
+#endif
+
+ arg = make_number (iarg);
}
/* Skip past a partially visible first line. */
Lisp_Object scroll_bar_width, vertical_scroll_bar_type;
};
-#define SAVED_WINDOW_VECTOR_SIZE 24 /* 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;
else
- old_point = BUF_PT (XBUFFER (new_current_buffer));
+ /* BUF_PT (XBUFFER (new_current_buffer)) gives us the position of
+ point in new_current_buffer as of the last time this buffer was
+ used. This can be non-deterministic since it can be changed by
+ things like jit-lock by mere temporary selection of some random
+ window that happens to show this buffer.
+ So if possible we want this arbitrary choice of "which point" to
+ be the one from the to-be-selected-window so as to prevent this
+ window's cursor from being copied from another window. */
+ if (EQ (XWINDOW (data->current_window)->buffer, new_current_buffer)
+ /* If current_window = selected_window, its point is in BUF_PT. */
+ && !EQ (selected_window, data->current_window))
+ old_point = XMARKER (XWINDOW (data->current_window)->pointm)->charpos;
+ else
+ old_point = BUF_PT (XBUFFER (new_current_buffer));
}
frame = XWINDOW (SAVED_WINDOW_N (saved_windows, 0)->window)->frame;
data->saved_windows = tem;
for (i = 0; i < n_windows; i++)
XVECTOR (tem)->contents[i]
- = Fmake_vector (make_number (SAVED_WINDOW_VECTOR_SIZE), Qnil);
+ = Fmake_vector (make_number (VECSIZE (struct saved_window)), Qnil);
save_window_save (FRAME_ROOT_WINDOW (f), XVECTOR (tem), 0);
XSETWINDOW_CONFIGURATION (tem, data);
return (tem);
reserve for the left marginal area. Optional third arg RIGHT-WIDTH
does the same for the right marginal area. A nil width parameter
means no margin. */)
- (window, left, right)
- Lisp_Object window, left, right;
+ (window, left_width, right_width)
+ Lisp_Object window, left_width, right_width;
{
struct window *w = decode_window (window);
/* Translate negative or zero widths to nil.
Margins that are too wide have to be checked elsewhere. */
- if (!NILP (left))
+ if (!NILP (left_width))
{
- CHECK_NUMBER (left);
- if (XINT (left) <= 0)
- left = Qnil;
+ CHECK_NUMBER (left_width);
+ if (XINT (left_width) <= 0)
+ left_width = Qnil;
}
- if (!NILP (right))
+ if (!NILP (right_width))
{
- CHECK_NUMBER (right);
- if (XINT (right) <= 0)
- right = Qnil;
+ CHECK_NUMBER (right_width);
+ if (XINT (right_width) <= 0)
+ right_width = Qnil;
}
- if (!EQ (w->left_margin_cols, left)
- || !EQ (w->right_margin_cols, right))
+ if (!EQ (w->left_margin_cols, left_width)
+ || !EQ (w->right_margin_cols, right_width))
{
- w->left_margin_cols = left;
- w->right_margin_cols = right;
+ w->left_margin_cols = left_width;
+ w->right_margin_cols = right_width;
adjust_window_margins (w);
If optional fourth arg OUTSIDE-MARGINS is non-nil, draw the fringes
outside of the display margins. By default, fringes are drawn between
display marginal areas and the text area. */)
- (window, left, right, outside_margins)
- Lisp_Object window, left, right, outside_margins;
+ (window, left_width, right_width, outside_margins)
+ Lisp_Object window, left_width, right_width, outside_margins;
{
struct window *w = decode_window (window);
- if (!NILP (left))
- CHECK_NATNUM (left);
- if (!NILP (right))
- CHECK_NATNUM (right);
+ if (!NILP (left_width))
+ CHECK_NATNUM (left_width);
+ if (!NILP (right_width))
+ CHECK_NATNUM (right_width);
- if (!EQ (w->left_fringe_width, left)
- || !EQ (w->right_fringe_width, right)
+ if (!EQ (w->left_fringe_width, left_width)
+ || !EQ (w->right_fringe_width, right_width)
|| !EQ (w->fringes_outside_margins, outside_margins))
{
- w->left_fringe_width = left;
- w->right_fringe_width = right;
+ w->left_fringe_width = left_width;
+ w->right_fringe_width = right_width;
w->fringes_outside_margins = outside_margins;
adjust_window_margins (w);
{
Qwindow_size_fixed = intern ("window-size-fixed");
staticpro (&Qwindow_size_fixed);
+ Fset (Qwindow_size_fixed, Qnil);
staticpro (&Qwindow_configuration_change_hook);
Qwindow_configuration_change_hook
DEFVAR_LISP ("special-display-buffer-names", &Vspecial_display_buffer_names,
doc: /* *List of buffer names that should have their own special frames.
-Displaying a buffer whose name is in this list makes a special frame for it
+Displaying a buffer with `display-buffer' or `pop-to-buffer',
+if its name is in this list, makes a special frame for it
using `special-display-function'. See also `special-display-regexps'.
An element of the list can be a list instead of just a string.
DEFVAR_LISP ("special-display-regexps", &Vspecial_display_regexps,
doc: /* *List of regexps saying which buffers should have their own special frames.
-If a buffer name matches one of these regexps, it gets its own frame.
-Displaying a buffer whose name is in this list makes a special frame for it
-using `special-display-function'.
+When displaying a buffer with `display-buffer' or `pop-to-buffer',
+if any regexp in this list matches the buffer name, it makes a
+special frame for the buffer by calling `special-display-function'.
An element of the list can be a list instead of just a string.
There are two ways to use a list as an element:
DEFVAR_LISP ("scroll-preserve-screen-position",
&Vscroll_preserve_screen_position,
- doc: /* *Non-nil means scroll commands move point to keep its screen line unchanged.
-This is only when it is impossible to keep point fixed and still
-scroll as specified. */);
+ doc: /* *Controls if scroll commands move point to keep its screen line unchanged.
+A value of nil means point does not keep its screen position except
+at the scroll margin or window boundary respectively.
+A value of t means point keeps its screen position if the scroll
+command moved it vertically out of the window, e.g. when scrolling
+by full screens.
+Any other value means point always keeps its screen position. */);
Vscroll_preserve_screen_position = Qnil;
DEFVAR_LISP ("window-configuration-change-hook",
The selected frame is the one whose configuration has changed. */);
Vwindow_configuration_change_hook = Qnil;
- DEFVAR_BOOL ("window-size-fixed", &window_size_fixed,
- doc: /* Non-nil in a buffer means windows displaying the buffer are fixed-size.
-If the value is`height', then only the window's height is fixed.
-If the value is `width', then only the window's width is fixed.
-Any other non-nil value fixes both the width and the height.
-Emacs won't change the size of any window displaying that buffer,
-unless you explicitly change the size, or Emacs has no other choice. */);
- Fmake_variable_buffer_local (Qwindow_size_fixed);
- window_size_fixed = 0;
-
defsubr (&Sselected_window);
defsubr (&Sminibuffer_window);
defsubr (&Swindow_minibuffer_p);