only if buffer is displayed somewhere.
(modify_overlay): Use BUF_COMPUTE_UNCHANGED.
(reset_buffer): Set clip_changed to 0 and
prevent_redisplay_optimizations_p to 1.
(Fget_buffer_create): Set prevent_redisplay_optimizations_p to 1.
(modify_overlay): Compute beg/end_unchanged
per buffer.
(Fget_buffer_create): Initialize new members of the buffer
structure.
well.
(redisplay_internal): Resize mini-window only if text might
have changed.
(display_echo_area): Reset displayed echo_area_buffer to nil
at the end if we're displaying a nil message.
new parameter.
Remove conditional compilation on
NO_PROMPT_IN_BUFFER.
(get_next_display_element): Display \r as ^M.
(minibuffer_scroll_overlap): Removed because not used
anywhere.
(unwind_redisplay): Return nil.
(clear_garbaged_frames): New.
(redisplay_internal): Use it.
(echo_area_display): Ditto.
(resize_mini_window): Mew.
(display_echo_area_1): Use it to resize echo area window.
(redisplay_internal): Use it to resize active mini-window.
(echo_area_glyphs, echo_area_message,
echo_area_glyphs_length, previous_echo_glyphs,
previous_echo_area_message, previous_echo_area_glyphs_length):
Removed.
(Vmessage_stack, echo_area_buffer, echo_buffer,
display_last_displayed_message_p, Vwith_echo_area_save_vector): New.
(message2_nolog): Use set_message and clear_message.
(message3): Rename parameter len to nbytes to make clear what
it is.
(message3_nolog): Ditto. Use set_message and clear_message.
(update_echo_area): Rewritten.
(with_echo_area_buffer): New.
(with_echo_area_buffer_unwind_data, unwind_with_area_buffer): New.
(setup_echo_area_for_printing): New.
(display_echo_area, display_echo_area_1): New.
(current_message, current_message_1): New.
(push_message, restore_message, pop_message,
check_message_stack): New.
(truncate_echo_area): Rewritten.
(truncate_message_1): New.
(set_message, set_message_1, clear_message): New.
(echo_area_display): Rewritten.
(redisplay_internal): Check for needed echo area update
differently.
(redisplay_preserve_echo_area): Rewritten.
(redisplay_window): Check for mini-window displaying echo area
message differently.
(syms_of_xdisp): Initialize Vmessage_stack and echo area buffers.
Remove initialzation of removed variables.
(init_xdisp): Remove references to removed variables.
(glyph_len, str_to_glyph_cpy, str_to_glyph_ncpy,
glyph_to_str_cpy): Remove that section because GLYPHs are no
longer used in that way.
(PRINTDECLARE): Add multibyte.
(PRINTPREPARE, PRINTFINISH): Handle printcharfun t differently.
(printbufidx): Removed.
(printchar, strout): Rewritten.
NO_PROMPT_IN_BUFFER.
(Fminibuffer_prompt_end): New.
(syms_of_minibuf): Defsubr it. Remove
minibuffer-prompt-in-buffer.
(Fminibuffer_prompt_width): Return 0 if not in mini-buffer.
Extend documentation.
(read_minibuf): Use clear_message instead of
setting echo_area_glyphs.
(Fminibuffer_completion_help): Ditto.
new parameter.
(ok_to_echo_at_next_pause): Make it a pointer to
a struct kboard.
(echo_kboard): New.
(echo_now): Set echo_kboard to the current kboard.
(cancel_echoing): Set echo_kboard to null.
(cmd_error_internal): Use clear_message, remove references
to echo_area_glyphs and echo_area_message.
(command_loop_1): Check for echo area messages differently.
(read_char): Likewise.
(record_menu_key): Use clear_message.
(Fexecute_extended_command): Check for echo area messages
differently. Use push_message, restore_message, pop_message.
function.
(hash_remove): Ditto.
(cmpfn_eq): Removed.
(cmpfn_eql): Don't test with EQ.
(cmpfn_equal): Ditto.
(make_hash_table): Set comparison function for `eq' to null.
(change_frame_size): Ditto.
(change_frame_size_1): Ditto. Deley size changes if redisplaying
and not called from a safe place.
(window_change_signal): Call change_frame_size with new parameter.
(set_window_cursor_after_update): Do the
cursor_in_echo_area case only for a mini-window showing
a message. Don't let cursor end up after the end of a row.
(adjust_frame_message_buffer): Removed references
to echo_area_glyphs and previous_echo_glyphs.
(direct_output_for_insert): Check for mini-window displaying
echo area message differently.
(update_frame): Likewise.
(set_window_cursor_after_update): Likewise. In echo area,
don't try to set cursor on rows that aren't enabled.
