X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/93e023fcee6863f22cebaf51dfe140a187f9eadc..01327edf8885f4ab47d33681582c41879f842217:/src/dispnew.c diff --git a/src/dispnew.c b/src/dispnew.c index 09a957b6dc..17c5f05053 100644 --- a/src/dispnew.c +++ b/src/dispnew.c @@ -1,7 +1,7 @@ /* Updating of data structures for redisplay. Copyright (C) 1985, 1986, 1987, 1988, 1993, 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, - 2004, 2005 Free Software Foundation, Inc. + 2004, 2005, 2006 Free Software Foundation, Inc. This file is part of GNU Emacs. @@ -192,6 +192,28 @@ struct window *frame_row_to_window P_ ((struct window *, int)); int redisplay_dont_pause; +/* Define PERIODIC_PREEMPTION_CHECKING to 1, if micro-second timers + are supported, so we can check for input during redisplay at + regular intervals. */ +#ifdef EMACS_HAS_USECS +#define PERIODIC_PREEMPTION_CHECKING 1 +#else +#define PERIODIC_PREEMPTION_CHECKING 0 +#endif + +#if PERIODIC_PREEMPTION_CHECKING + +/* If a number (float), check for user input every N seconds. */ + +Lisp_Object Vredisplay_preemption_period; + +/* Redisplay preemption timers. */ + +static EMACS_TIME preemption_period; +static EMACS_TIME preemption_next_check; + +#endif + /* Nonzero upon entry to redisplay means do not assume anything about current contents of actual terminal frame; clear and redraw it. */ @@ -355,8 +377,7 @@ static unsigned history_tick; static void add_frame_display_history P_ ((struct frame *, int)); static void add_window_display_history P_ ((struct window *, char *, int)); - - + /* Add to the redisplay history how window W has been displayed. MSG is a trace containing the information how W's glyph matrix has been constructed. PAUSED_P non-zero means that the update @@ -3821,6 +3842,28 @@ update_frame (f, force_p, inhibit_hairy_id_p) int paused_p; struct window *root_window = XWINDOW (f->root_window); +#if PERIODIC_PREEMPTION_CHECKING + if (!force_p && NUMBERP (Vredisplay_preemption_period)) + { + EMACS_TIME tm; + double p = XFLOATINT (Vredisplay_preemption_period); + int sec, usec; + + if (detect_input_pending_ignore_squeezables ()) + { + paused_p = 1; + goto do_pause; + } + + sec = (int) p; + usec = (p - sec) * 1000000; + + EMACS_GET_TIME (tm); + EMACS_SET_SECS_USECS (preemption_period, sec, usec); + EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); + } +#endif + if (FRAME_WINDOW_P (f)) { /* We are working on window matrix basis. All windows whose @@ -3899,6 +3942,7 @@ update_frame (f, force_p, inhibit_hairy_id_p) #endif } + do_pause: /* Reset flags indicating that a window should be updated. */ set_window_update_flags (root_window, 0); @@ -3953,6 +3997,22 @@ update_single_window (w, force_p) /* Record that this is not a frame-based redisplay. */ set_frame_matrix_frame (NULL); +#if PERIODIC_PREEMPTION_CHECKING + if (!force_p && NUMBERP (Vredisplay_preemption_period)) + { + EMACS_TIME tm; + double p = XFLOATINT (Vredisplay_preemption_period); + int sec, usec; + + sec = (int) p; + usec = (p - sec) * 1000000; + + EMACS_GET_TIME (tm); + EMACS_SET_SECS_USECS (preemption_period, sec, usec); + EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); + } +#endif + /* Update W. */ update_begin (f); update_window (w, force_p); @@ -4108,7 +4168,9 @@ update_window (w, force_p) { struct glyph_matrix *desired_matrix = w->desired_matrix; int paused_p; +#if !PERIODIC_PREEMPTION_CHECKING int preempt_count = baud_rate / 2400 + 1; +#endif extern int input_pending; extern Lisp_Object do_mouse_tracking; #if GLYPH_DEBUG @@ -4120,8 +4182,13 @@ update_window (w, force_p) /* Check pending input the first time so that we can quickly return. */ if (redisplay_dont_pause) force_p = 1; - else +#if PERIODIC_PREEMPTION_CHECKING + else if (NILP (Vredisplay_preemption_period)) + force_p = 1; +#else + else if (!force_p) detect_input_pending_ignore_squeezables (); +#endif /* If forced to complete the update, or if no input is pending, do the update. */ @@ -4156,7 +4223,6 @@ update_window (w, force_p) update_window_line (w, MATRIX_ROW_VPOS (mode_line_row, desired_matrix), &mouse_face_overwritten_p); - changed_p = 1; } /* Find first enabled row. Optimizations in redisplay_internal @@ -4194,9 +4260,23 @@ update_window (w, force_p) detect_input_pending. If it's done too often, scrolling large windows with repeated scroll-up commands will too quickly pause redisplay. */ +#if PERIODIC_PREEMPTION_CHECKING + if (!force_p) + { + EMACS_TIME tm, dif; + EMACS_GET_TIME (tm); + EMACS_SUB_TIME (dif, preemption_next_check, tm); + if (EMACS_TIME_NEG_P (dif)) + { + EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); + if (detect_input_pending_ignore_squeezables ()) + break; + } + } +#else if (!force_p && ++n_updated % preempt_count == 0) detect_input_pending_ignore_squeezables (); - +#endif changed_p |= update_window_line (w, vpos, &mouse_face_overwritten_p); @@ -4226,7 +4306,6 @@ update_window (w, force_p) { header_line_row->y = 0; update_window_line (w, 0, &mouse_face_overwritten_p); - changed_p = 1; } /* Fix the appearance of overlapping/overlapped rows. */ @@ -4358,10 +4437,14 @@ update_text_area (w, vpos) int overlapping_glyphs_p = current_row->contains_overlapping_glyphs_p; int desired_stop_pos = desired_row->used[TEXT_AREA]; - /* If the desired row extends its face to the text area end, + /* If the desired row extends its face to the text area end, and + unless the current row also does so at the same position, make sure we write at least one glyph, so that the face extension actually takes place. */ - if (MATRIX_ROW_EXTENDS_FACE_P (desired_row)) + if (MATRIX_ROW_EXTENDS_FACE_P (desired_row) + && (desired_stop_pos < current_row->used[TEXT_AREA] + || (desired_stop_pos == current_row->used[TEXT_AREA] + && !MATRIX_ROW_EXTENDS_FACE_P (current_row)))) --desired_stop_pos; stop = min (current_row->used[TEXT_AREA], desired_stop_pos); @@ -4480,7 +4563,10 @@ update_text_area (w, vpos) has to be cleared, if and only if we did a write_glyphs above. This is made sure by setting desired_stop_pos appropriately above. */ - xassert (i < desired_row->used[TEXT_AREA]); + xassert (i < desired_row->used[TEXT_AREA] + || ((desired_row->used[TEXT_AREA] + == current_row->used[TEXT_AREA]) + && MATRIX_ROW_EXTENDS_FACE_P (current_row))); } else if (MATRIX_ROW_EXTENDS_FACE_P (current_row)) { @@ -5141,11 +5227,16 @@ update_frame_1 (f, force_p, inhibit_id_p) if (redisplay_dont_pause) force_p = 1; +#if PERIODIC_PREEMPTION_CHECKING + else if (NILP (Vredisplay_preemption_period)) + force_p = 1; +#else else if (!force_p && detect_input_pending_ignore_squeezables ()) { pause = 1; goto do_pause; } +#endif /* If we cannot insert/delete lines, it's no use trying it. */ if (!line_ins_del_ok) @@ -5196,8 +5287,23 @@ update_frame_1 (f, force_p, inhibit_id_p) } } - if ((i - 1) % preempt_count == 0) +#if PERIODIC_PREEMPTION_CHECKING + if (!force_p) + { + EMACS_TIME tm, dif; + EMACS_GET_TIME (tm); + EMACS_SUB_TIME (dif, preemption_next_check, tm); + if (EMACS_TIME_NEG_P (dif)) + { + EMACS_ADD_TIME (preemption_next_check, tm, preemption_period); + if (detect_input_pending_ignore_squeezables ()) + break; + } + } +#else + if (!force_p && (i - 1) % preempt_count == 0) detect_input_pending_ignore_squeezables (); +#endif update_frame_line (f, i); } @@ -6389,22 +6495,28 @@ Emacs was built without floating point support. /* This is just like wait_reading_process_output, except that - it does the redisplay. - - It's also much like Fsit_for, except that it can be used for - waiting for input as well. */ + it does redisplay. */ Lisp_Object sit_for (sec, usec, reading, display, initial_display) int sec, usec, reading, display, initial_display; { + int preempt = (sec > 0) || (sec == 0 && usec >= 0); + swallow_events (display); - if (detect_input_pending_run_timers (display) || !NILP (Vexecuting_kbd_macro)) + if ((detect_input_pending_run_timers (display) && preempt) + || !NILP (Vexecuting_kbd_macro)) return Qnil; if (initial_display) - redisplay_preserve_echo_area (2); + { + int count = SPECPDL_INDEX (); + if (!preempt) + specbind (Qredisplay_dont_pause, Qt); + redisplay_preserve_echo_area (2); + unbind_to (count, Qnil); + } if (sec == 0 && usec == 0) return Qt; @@ -6420,54 +6532,27 @@ sit_for (sec, usec, reading, display, initial_display) } -DEFUN ("sit-for", Fsit_for, Ssit_for, 1, 3, 0, - doc: /* Perform redisplay, then wait for SECONDS seconds or until input is available. -SECONDS may be a floating-point value, meaning that you can wait for a -fraction of a second. -\(Not all operating systems support waiting for a fraction of a second.) -Optional arg NODISP non-nil means don't redisplay, just wait for input. -Redisplay is preempted as always if input arrives, and does not happen -if input is available before it starts. -Value is t if waited the full time with no input arriving. - -An obsolete but still supported form is -\(sit-for SECONDS &optional MILLISECONDS NODISP) -Where the optional arg MILLISECONDS specifies an additional wait period, -in milliseconds; this was useful when Emacs was built without -floating point support. -usage: (sit-for SECONDS &optional NODISP OLD-NODISP) */) - -/* The `old-nodisp' stuff is there so that the arglist has the correct - length. Otherwise, `defdvice' will redefine it with fewer args. */ - (seconds, milliseconds, nodisp) - Lisp_Object seconds, milliseconds, nodisp; +DEFUN ("redisplay", Fredisplay, Sredisplay, 0, 1, 0, + doc: /* Perform redisplay if no input is available. +If optional arg FORCE is non-nil, perform a full redisplay even if +input is available. */) + (force) + Lisp_Object force; { - int sec, usec; - - if (NILP (nodisp) && !NUMBERP (milliseconds)) - { /* New style. */ - nodisp = milliseconds; - milliseconds = Qnil; - } - - if (NILP (milliseconds)) - XSETINT (milliseconds, 0); - else - CHECK_NUMBER (milliseconds); - usec = XINT (milliseconds) * 1000; - - { - double duration = extract_float (seconds); - sec = (int) duration; - usec += (duration - sec) * 1000000; - } + int count; -#ifndef EMACS_HAS_USECS - if (usec != 0 && sec == 0) - error ("Millisecond `sit-for' not supported on %s", SYSTEM_TYPE); -#endif + swallow_events (Qt); + if ((detect_input_pending_run_timers (Qt) + && NILP (force) && !redisplay_dont_pause) + || !NILP (Vexecuting_kbd_macro)) + return Qnil; - return sit_for (sec, usec, 0, NILP (nodisp), NILP (nodisp)); + count = SPECPDL_INDEX (); + if (!NILP (force) && !redisplay_dont_pause) + specbind (Qredisplay_dont_pause, Qt); + redisplay_preserve_echo_area (2); + unbind_to (count, Qnil); + return Qt; } @@ -6647,7 +6732,7 @@ init_display () try to use X, and die with an error message if that doesn't work. */ #ifdef HAVE_X_WINDOWS - if (! display_arg) + if (! inhibit_window_system && ! display_arg) { char *display; #ifdef VMS @@ -6657,6 +6742,13 @@ init_display () #endif display_arg = (display != 0 && *display != 0); + + if (display_arg && !x_display_ok (display)) + { + fprintf (stderr, "Display %s unavailable, simulating -nw\n", + display); + inhibit_window_system = 1; + } } if (!inhibit_window_system && display_arg @@ -6850,7 +6942,7 @@ syms_of_display () defsubr (&Sframe_or_buffer_changed_p); defsubr (&Sopen_termscript); defsubr (&Sding); - defsubr (&Ssit_for); + defsubr (&Sredisplay); defsubr (&Ssleep_for); defsubr (&Ssend_string_to_terminal); defsubr (&Sinternal_show_cursor); @@ -6920,7 +7012,14 @@ See `buffer-display-table' for more information. */); doc: /* *Non-nil means update isn't paused when input is detected. */); redisplay_dont_pause = 0; - /* Initialize `window-system', unless init_display already decided it. */ +#if PERIODIC_PREEMPTION_CHECKING + DEFVAR_LISP ("redisplay-preemption-period", &Vredisplay_preemption_period, + doc: /* *The period in seconds between checking for input during redisplay. +If input is detected, redisplay is pre-empted, and the input is processed. +If nil, never pre-empt redisplay. */); + Vredisplay_preemption_period = make_float (0.10); +#endif + #ifdef CANNOT_DUMP if (noninteractive) #endif