X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/74fb229b2afe71c929eafa1d1b4ed4d3befe7f13..2a205424e771703217ce8c6b4252d810d3310cd2:/src/xdisp.c diff --git a/src/xdisp.c b/src/xdisp.c index 40e83c7d37..d7de7dbe82 100644 --- a/src/xdisp.c +++ b/src/xdisp.c @@ -16,8 +16,8 @@ GNU General Public License for more details. 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. */ /* New redisplay written by Gerd Moellmann . @@ -231,7 +231,7 @@ extern Lisp_Object Qhelp_echo; Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map; Lisp_Object Qwindow_scroll_functions, Vwindow_scroll_functions; -Lisp_Object Qredisplay_end_trigger_functions; +Lisp_Object Qredisplay_end_trigger_functions, Vredisplay_end_trigger_functions; Lisp_Object Qinhibit_point_motion_hooks; Lisp_Object QCeval, QCfile, QCdata, QCpropertize; Lisp_Object Qfontified; @@ -2408,7 +2408,9 @@ start_display (it, w, pos) init_iterator (it, w, CHARPOS (pos), BYTEPOS (pos), row, DEFAULT_FACE_ID); it->first_vpos = first_vpos; - if (!it->truncate_lines_p) + /* Don't reseat to previous visible line start if current start + position is in a string or image. */ + if (it->method == GET_FROM_BUFFER && !it->truncate_lines_p) { int start_at_line_beg_p; int first_y = it->current_y; @@ -5871,6 +5873,15 @@ next_element_from_composition (it) Moving an iterator without producing glyphs ***********************************************************************/ +/* Check if iterator is at a position corresponding to a valid buffer + position after some move_it_ call. */ + +#define IT_POS_VALID_AFTER_MOVE_P(it) \ + ((it)->method == GET_FROM_STRING \ + ? IT_STRING_CHARPOS (*it) == 0 \ + : 1) + + /* Move iterator IT to a specified buffer or X position within one line on the display without producing glyphs. @@ -6379,8 +6390,12 @@ move_it_vertically_backward (it, dy) y-distance. */ it2 = *it; it2.max_ascent = it2.max_descent = 0; - move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, - MOVE_TO_POS | MOVE_TO_VPOS); + do + { + move_it_to (&it2, start_pos, -1, -1, it2.vpos + 1, + MOVE_TO_POS | MOVE_TO_VPOS); + } + while (!IT_POS_VALID_AFTER_MOVE_P (&it2)); xassert (IT_CHARPOS (*it) >= BEGV); it3 = it2; @@ -6578,21 +6593,45 @@ move_it_by_lines (it, dvpos, need_y_p) last_height = 0; } else if (dvpos > 0) - move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); + { + move_it_to (it, -1, -1, -1, it->vpos + dvpos, MOVE_TO_VPOS); + if (!IT_POS_VALID_AFTER_MOVE_P (it)) + move_it_to (it, IT_CHARPOS (*it) + 1, -1, -1, -1, MOVE_TO_POS); + } else { struct it it2; int start_charpos, i; /* Start at the beginning of the screen line containing IT's - position. */ + position. This may actually move vertically backwards, + in case of overlays, so adjust dvpos accordingly. */ + dvpos += it->vpos; move_it_vertically_backward (it, 0); + dvpos -= it->vpos; /* Go back -DVPOS visible lines and reseat the iterator there. */ start_charpos = IT_CHARPOS (*it); - for (i = -dvpos; i && IT_CHARPOS (*it) > BEGV; --i) + for (i = -dvpos; i > 0 && IT_CHARPOS (*it) > BEGV; --i) back_to_previous_visible_line_start (it); reseat (it, it->current.pos, 1); + + /* Move further back if we end up in a string or an image. */ + while (!IT_POS_VALID_AFTER_MOVE_P (it)) + { + /* First try to move to start of display line. */ + dvpos += it->vpos; + move_it_vertically_backward (it, 0); + dvpos -= it->vpos; + if (IT_POS_VALID_AFTER_MOVE_P (it)) + break; + /* If start of line is still in string or image, + move further back. */ + back_to_previous_visible_line_start (it); + reseat (it, it->current.pos, 1); + dvpos--; + } + it->current_x = it->hpos = 0; /* Above call may have moved too far if continuation lines @@ -10046,7 +10085,9 @@ select_frame_for_redisplay (frame) (BUFFER_LOCAL_VALUEP (val) || SOME_BUFFER_LOCAL_VALUEP (val))) && XBUFFER_LOCAL_VALUE (val)->check_frame) - Fsymbol_value (sym); + /* Use find_symbol_value rather than Fsymbol_value + to avoid an error if it is void. */ + find_symbol_value (sym); for (tail = XFRAME (old)->param_alist; CONSP (tail); tail = XCDR (tail)) if (CONSP (XCAR (tail)) @@ -10057,7 +10098,7 @@ select_frame_for_redisplay (frame) (BUFFER_LOCAL_VALUEP (val) || SOME_BUFFER_LOCAL_VALUEP (val))) && XBUFFER_LOCAL_VALUE (val)->check_frame) - Fsymbol_value (sym); + find_symbol_value (sym); } @@ -10131,6 +10172,16 @@ redisplay_internal (preserve_echo_area) ++redisplaying_p; specbind (Qinhibit_free_realized_faces, Qnil); + { + Lisp_Object tail, frame; + + FOR_EACH_FRAME (tail, frame) + { + struct frame *f = XFRAME (frame); + f->already_hscrolled_p = 0; + } + } + retry: pause = 0; reconsider_clip_changes (w, current_buffer); @@ -10565,8 +10616,12 @@ redisplay_internal (preserve_echo_area) if (FRAME_VISIBLE_P (f) && !FRAME_OBSCURED_P (f)) { /* See if we have to hscroll. */ - if (hscroll_windows (f->root_window)) - goto retry; + if (!f->already_hscrolled_p) + { + f->already_hscrolled_p = 1; + if (hscroll_windows (f->root_window)) + goto retry; + } /* Prevent various kinds of signals during display update. stdio is not robust about handling @@ -11294,7 +11349,7 @@ cursor_row_fully_visible_p (w, force_p, current_matrix_p) window_height = window_box_height (w); if (row->height >= window_height) { - if (!force_p || w->vscroll) + if (!force_p || MINI_WINDOW_P (w) || w->vscroll) return 1; } return 0; @@ -11824,7 +11879,10 @@ try_cursor_movement (window, startp, scroll_step) while (!row->mode_line_p && (MATRIX_ROW_START_CHARPOS (row) > PT || (MATRIX_ROW_START_CHARPOS (row) == PT - && MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row))) + && (MATRIX_ROW_STARTS_IN_MIDDLE_OF_CHAR_P (row) + || (/* STARTS_IN_MIDDLE_OF_STRING_P (row) */ + row > w->current_matrix->rows + && (row-1)->ends_in_newline_from_string_p)))) && (row->y > top_scroll_margin || CHARPOS (startp) == BEGV)) { @@ -12729,7 +12787,8 @@ try_window (window, pos, check_margins) } /* Don't let the cursor end in the scroll margins. */ - if (check_margins) + if (check_margins + && !MINI_WINDOW_P (w)) { int this_scroll_margin, cursor_height; @@ -12740,11 +12799,11 @@ try_window (window, pos, check_margins) if ((w->cursor.y < this_scroll_margin && CHARPOS (pos) > BEGV) - /* Old redisplay didn't take scroll margin into account at the bottom, - but then global-hl-line-mode doesn't scroll. KFS 2004-06-14 */ - || (w->cursor.y + (make_cursor_line_fully_visible_p - ? cursor_height + this_scroll_margin - : 1)) > it.last_visible_y) + /* rms: considering make_cursor_line_fully_visible_p here + seems to give wrong results. We don't want to recenter + when the last line is partly visible, we want to allow + that case to be handled in the usual way. */ + || (w->cursor.y + 1) > it.last_visible_y) { w->cursor.vpos = -1; clear_glyph_matrix (w->desired_matrix); @@ -14994,10 +15053,12 @@ cursor_row_p (w, row) if (PT == MATRIX_ROW_END_CHARPOS (row)) { /* If the row ends with a newline from a string, we don't want - the cursor there (if the row is continued it doesn't end in a - newline). */ + the cursor there, but we still want it at the start of the + string if the string starts in this row. + If the row is continued it doesn't end in a newline. */ if (CHARPOS (row->end.string_pos) >= 0) - cursor_row_p = row->continued_p; + cursor_row_p = (row->continued_p + || PT >= MATRIX_ROW_START_CHARPOS (row)); else if (MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)) { /* If the row ends in middle of a real character, @@ -23075,6 +23136,12 @@ and its new display-start position. Note that the value of `window-end' is not valid when these functions are called. */); Vwindow_scroll_functions = Qnil; + DEFVAR_LISP ("redisplay-end-trigger-functions", &Vredisplay_end_trigger_functions, + doc: /* Functions called when redisplay of a window reaches the end trigger. +Each function is called with two arguments, the window and the end trigger value. +See `set-window-redisplay-end-trigger'. */); + Vredisplay_end_trigger_functions = Qnil; + DEFVAR_BOOL ("mouse-autoselect-window", &mouse_autoselect_window, doc: /* *Non-nil means autoselect window with mouse pointer. */); mouse_autoselect_window = 0;