- mouse_face_beg_row = mouse_face_beg_col = -1;
- mouse_face_end_row = mouse_face_end_col = -1;
- mouse_face_window = Qnil;
-}
-
-/* Find the glyph matrix position of buffer position POS in window W.
- *HPOS and *VPOS are set to the positions found. W's current glyphs
- must be up to date. If POS is above window start return (0, 0).
- If POS is after end of W, return end of last line in W.
- - taken from msdos.c */
-static int
-fast_find_position (struct window *w, int pos, int *hpos, int *vpos)
-{
- int i, lastcol, line_start_position, maybe_next_line_p = 0;
- int yb = window_text_bottom_y (w);
- struct glyph_row *row = MATRIX_ROW (w->current_matrix, 0), *best_row = row;
-
- while (row->y < yb)
- {
- if (row->used[TEXT_AREA])
- line_start_position = row->glyphs[TEXT_AREA]->charpos;
- else
- line_start_position = 0;
-
- if (line_start_position > pos)
- break;
- /* If the position sought is the end of the buffer,
- don't include the blank lines at the bottom of the window. */
- else if (line_start_position == pos
- && pos == BUF_ZV (XBUFFER (w->buffer)))
- {
- maybe_next_line_p = 1;
- break;
- }
- else if (line_start_position > 0)
- best_row = row;
-
- /* Don't overstep the last matrix row, lest we get into the
- never-never land... */
- if (row->y + 1 >= yb)
- break;
-
- ++row;
- }
-
- /* Find the right column within BEST_ROW. */
- lastcol = 0;
- row = best_row;
- for (i = 0; i < row->used[TEXT_AREA]; i++)
- {
- struct glyph *glyph = row->glyphs[TEXT_AREA] + i;
- int charpos;
-
- charpos = glyph->charpos;
- if (charpos == pos)
- {
- *hpos = i;
- *vpos = row->y;
- return 1;
- }
- else if (charpos > pos)
- break;
- else if (charpos > 0)
- lastcol = i;
- }
-
- /* If we're looking for the end of the buffer,
- and we didn't find it in the line we scanned,
- use the start of the following line. */
- if (maybe_next_line_p)
- {
- ++row;
- lastcol = 0;
- }
-
- *vpos = row->y;
- *hpos = lastcol + 1;
- return 0;
-}
-
-static void
-term_mouse_highlight (struct frame *f, int x, int y)
-{
- enum window_part part;
- Lisp_Object window;
- struct window *w;
- struct buffer *b;
-
- if (NILP (Vmouse_highlight)
- || !f->glyphs_initialized_p)
- return;
-
- /* Which window is that in? */
- window = window_from_coordinates (f, x, y, &part, &x, &y, 0);
-
- /* Not on a window -> return. */
- if (!WINDOWP (window))
- return;
-
- if (!EQ (window, mouse_face_window))
- term_clear_mouse_face ();
-
- w = XWINDOW (window);
-
- /* Are we in a window whose display is up to date?
- And verify the buffer's text has not changed. */
- b = XBUFFER (w->buffer);
- if (part == ON_TEXT
- && EQ (w->window_end_valid, w->buffer)
- && XFASTINT (w->last_modified) == BUF_MODIFF (b)
- && XFASTINT (w->last_overlay_modified) == BUF_OVERLAY_MODIFF (b))
- {
- int pos, i, nrows = w->current_matrix->nrows;
- struct glyph_row *row;
- struct glyph *glyph;
-
- /* Find the glyph under X/Y. */
- glyph = NULL;
- if (y >= 0 && y < nrows)
- {
- row = MATRIX_ROW (w->current_matrix, y);
- /* Give up if some row before the one we are looking for is
- not enabled. */
- for (i = 0; i <= y; i++)
- if (!MATRIX_ROW (w->current_matrix, i)->enabled_p)
- break;
- if (i > y /* all rows upto and including the one at Y are enabled */
- && row->displays_text_p
- && x < window_box_width (w, TEXT_AREA))
- {
- glyph = row->glyphs[TEXT_AREA];
- if (x >= row->used[TEXT_AREA])
- glyph = NULL;
- else
- {
- glyph += x;
- if (!BUFFERP (glyph->object))
- glyph = NULL;
- }
- }
- }
-
- /* Clear mouse face if X/Y not over text. */
- if (glyph == NULL)
- {
- term_clear_mouse_face ();
- return;
- }
-
- if (!BUFFERP (glyph->object))
- abort ();
- pos = glyph->charpos;
-
- /* Check for mouse-face. */
- {
- Lisp_Object mouse_face, overlay, position, *overlay_vec;
- int noverlays, obegv, ozv;
- struct buffer *obuf;
-
- /* If we get an out-of-range value, return now; avoid an error. */
- if (pos > BUF_Z (b))
- return;
-
- /* Make the window's buffer temporarily current for
- overlays_at and compute_char_face. */
- obuf = current_buffer;
- current_buffer = b;
- obegv = BEGV;
- ozv = ZV;
- BEGV = BEG;
- ZV = Z;
-
- /* Is this char mouse-active? */
- XSETINT (position, pos);
-
- /* Put all the overlays we want in a vector in overlay_vec. */
- GET_OVERLAYS_AT (pos, overlay_vec, noverlays, NULL, 0);
- /* Sort overlays into increasing priority order. */
- noverlays = sort_overlays (overlay_vec, noverlays, w);
-
- /* Check mouse-face highlighting. */
- if (!(EQ (window, mouse_face_window)
- && y >= mouse_face_beg_row
- && y <= mouse_face_end_row
- && (y > mouse_face_beg_row
- || x >= mouse_face_beg_col)
- && (y < mouse_face_end_row
- || x < mouse_face_end_col
- || mouse_face_past_end)))
- {
- /* Clear the display of the old active region, if any. */
- term_clear_mouse_face ();
-
- /* Find the highest priority overlay that has a mouse-face
- property. */
- overlay = Qnil;
- for (i = noverlays - 1; i >= 0; --i)
- {
- mouse_face = Foverlay_get (overlay_vec[i], Qmouse_face);
- if (!NILP (mouse_face))
- {
- overlay = overlay_vec[i];
- break;
- }
- }
-
- /* If no overlay applies, get a text property. */
- if (NILP (overlay))
- mouse_face = Fget_text_property (position, Qmouse_face,
- w->buffer);
-
- /* Handle the overlay case. */
- if (!NILP (overlay))
- {
- /* Find the range of text around this char that
- should be active. */
- Lisp_Object before, after;
- EMACS_INT ignore;
-
-
- before = Foverlay_start (overlay);
- after = Foverlay_end (overlay);
- /* Record this as the current active region. */
- fast_find_position (w, XFASTINT (before),
- &mouse_face_beg_col,
- &mouse_face_beg_row);
-
- mouse_face_past_end
- = !fast_find_position (w, XFASTINT (after),
- &mouse_face_end_col,
- &mouse_face_end_row);
- mouse_face_window = window;
-
- mouse_face_face_id
- = face_at_buffer_position (w, pos, 0, 0,
- &ignore, pos + 1, 1, -1);
-
- /* Display it as active. */
- term_show_mouse_face (DRAW_MOUSE_FACE);
- }
- /* Handle the text property case. */
- else if (!NILP (mouse_face))
- {
- /* Find the range of text around this char that
- should be active. */
- Lisp_Object before, after, beginning, end;
- EMACS_INT ignore;
-
- beginning = Fmarker_position (w->start);
- XSETINT (end, (BUF_Z (b) - XFASTINT (w->window_end_pos)));
- before
- = Fprevious_single_property_change (make_number (pos + 1),
- Qmouse_face,
- w->buffer, beginning);
- after
- = Fnext_single_property_change (position, Qmouse_face,
- w->buffer, end);
-
- /* Record this as the current active region. */
- fast_find_position (w, XFASTINT (before),
- &mouse_face_beg_col,
- &mouse_face_beg_row);
- mouse_face_past_end
- = !fast_find_position (w, XFASTINT (after),
- &mouse_face_end_col,
- &mouse_face_end_row);
- mouse_face_window = window;
-
- mouse_face_face_id
- = face_at_buffer_position (w, pos, 0, 0,
- &ignore, pos + 1, 1, -1);
-
- /* Display it as active. */
- term_show_mouse_face (DRAW_MOUSE_FACE);
- }
- }
-
- /* Look for a `help-echo' property. */
- {
- Lisp_Object help;
-
- /* Check overlays first. */
- help = Qnil;
- for (i = noverlays - 1; i >= 0 && NILP (help); --i)
- {
- overlay = overlay_vec[i];
- help = Foverlay_get (overlay, Qhelp_echo);
- }
-
- if (!NILP (help))
- {
- help_echo_string = help;
- help_echo_window = window;
- help_echo_object = overlay;
- help_echo_pos = pos;
- }
- /* Try text properties. */
- else if (NILP (help)
- && ((STRINGP (glyph->object)
- && glyph->charpos >= 0
- && glyph->charpos < SCHARS (glyph->object))
- || (BUFFERP (glyph->object)
- && glyph->charpos >= BEGV
- && glyph->charpos < ZV)))
- {
- help = Fget_text_property (make_number (glyph->charpos),
- Qhelp_echo, glyph->object);
- if (!NILP (help))
- {
- help_echo_string = help;
- help_echo_window = window;
- help_echo_object = glyph->object;
- help_echo_pos = glyph->charpos;
- }
- }
- }
-
- BEGV = obegv;
- ZV = ozv;
- current_buffer = obuf;
- }
- }