compute_line_metrics (&it);
}
+#ifdef HAVE_MENUS
+/* Deep copy of a glyph row, including the glyphs. */
+static void
+deep_copy_glyph_row (struct glyph_row *to, struct glyph_row *from)
+{
+ int area, i, sum_used = 0;
+ struct glyph *pointers[1 + LAST_AREA];
+
+ /* Save glyph pointers of TO. */
+ memcpy (pointers, to->glyphs, sizeof to->glyphs);
+
+ /* Do a structure assignment. */
+ *to = *from;
+
+ /* Restore original pointers of TO. */
+ memcpy (to->glyphs, pointers, sizeof to->glyphs);
+ /* Count how many glyphs to copy and update glyph pointers. */
+ for (area = LEFT_MARGIN_AREA; area < LAST_AREA; ++area)
+ {
+ if (area > LEFT_MARGIN_AREA)
+ {
+ eassert (from->glyphs[area] - from->glyphs[area - 1]
+ == from->used[area - 1]);
+ to->glyphs[area] = to->glyphs[area - 1] + to->used[area - 1];
+ }
+ sum_used += from->used[area];
+ }
+
+ /* Copy the glyphs. */
+ eassert (sum_used <= to->glyphs[LAST_AREA] - to->glyphs[LEFT_MARGIN_AREA]);
+ for (i = 0; i < sum_used; i++)
+ to->glyphs[LEFT_MARGIN_AREA][i] = from->glyphs[LEFT_MARGIN_AREA][i];
+}
+
+/* Display one menu item on a TTY, by overwriting the glyphs in the
+ desired glyph matrix with glyphs produced from the menu item text.
+ Called from term.c to display TTY drop-down menus one item at a
+ time.
+
+ ITEM_TEXT is the menu item text as a C string.
+
+ FACE_ID is the face ID to be used for this menu item. FACE_ID
+ could specify one of 3 faces: a face for an enabled item, a face
+ for a disabled item, or a face for a selected item.
+
+ X and Y are coordinates of the first glyph in the desired matrix to
+ be overwritten by the menu item. Since this is a TTY, Y is the
+ zero-based number of the glyph row and X is the zero-based glyph
+ number in the row, starting from left, where to start displaying
+ the item.
+
+ SUBMENU non-zero means this menu item drops down a submenu, which
+ should be indicated by displaying a proper visual cue after the
+ item text. */
+
+void
+display_tty_menu_item (const char *item_text, int width, int face_id,
+ int x, int y, int submenu)
+{
+ struct it it;
+ struct frame *f = SELECTED_FRAME ();
+ struct window *w = XWINDOW (f->selected_window);
+ int saved_used, saved_truncated, saved_width, saved_reversed;
+ struct glyph_row *row;
+ size_t item_len = strlen (item_text);
+
+ eassert (FRAME_TERMCAP_P (f));
+
+ init_iterator (&it, w, -1, -1, f->desired_matrix->rows + y, MENU_FACE_ID);
+ it.first_visible_x = 0;
+ it.last_visible_x = FRAME_COLS (f) - 1;
+ row = it.glyph_row;
+ /* Start with the row contents from the current matrix. */
+ deep_copy_glyph_row (row, f->current_matrix->rows + y);
+ saved_width = row->full_width_p;
+ row->full_width_p = 1;
+ saved_reversed = row->reversed_p;
+ row->reversed_p = 0;
+ row->enabled_p = 1;
+
+ /* Arrange for the menu item glyphs to start at (X,Y) and have the
+ desired face. */
+ it.current_x = it.hpos = x;
+ it.current_y = it.vpos = y;
+ saved_used = row->used[TEXT_AREA];
+ saved_truncated = row->truncated_on_right_p;
+ row->used[TEXT_AREA] = x;
+ it.face_id = face_id;
+ it.line_wrap = TRUNCATE;
+
+ /* FIXME: This should be controlled by a user option. See the
+ comments in redisplay_tool_bar and display_mode_line about this.
+ Also, if paragraph_embedding could ever be R2L, changes will be
+ needed to avoid shifting to the right the row characters in
+ term.c:append_glyph. */
+ it.paragraph_embedding = L2R;
+
+ /* Pad with a space on the left. */
+ display_string (" ", Qnil, Qnil, 0, 0, &it, 1, 0, FRAME_COLS (f) - 1, -1);
+ width--;
+ /* Display the menu item, pad with spaces to WIDTH. */
+ if (submenu)
+ {
+ display_string (item_text, Qnil, Qnil, 0, 0, &it,
+ item_len, 0, FRAME_COLS (f) - 1, -1);
+ width -= item_len;
+ /* Indicate with " >" that there's a submenu. */
+ display_string (" >", Qnil, Qnil, 0, 0, &it, width, 0,
+ FRAME_COLS (f) - 1, -1);
+ }
+ else
+ display_string (item_text, Qnil, Qnil, 0, 0, &it,
+ width, 0, FRAME_COLS (f) - 1, -1);
+
+ row->used[TEXT_AREA] = max (saved_used, row->used[TEXT_AREA]);
+ row->truncated_on_right_p = saved_truncated;
+ row->hash = row_hash (row);
+ row->full_width_p = saved_width;
+ row->reversed_p = saved_reversed;
+}
+#endif /* HAVE_MENUS */
\f
/***********************************************************************
Mode Line
HCoop / bpt / emacs.git / blobdiff