edit.c

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    edit->force |= REDRAW_LINE;
    if (edit->found_len)
/* the next key press will unhighlight the found string, so update whole page */
	edit->force |= REDRAW_PAGE;

    if (command / 100 == 6) {	/* a highlight command like shift-arrow */
	if (!edit->highlight || (edit->mark2 != -1 && edit->mark1 != edit->mark2)) {
	    edit_mark_cmd (edit, 1);	/* clear */
	    edit_mark_cmd (edit, 0);	/* marking on */
	}
	edit->highlight = 1;
    } else {			/* any other command */
	if (edit->highlight)
	    edit_mark_cmd (edit, 0);	/* clear */
	edit->highlight = 0;
    }

/* first check for undo */
    if (command == CK_Undo) {
	edit_do_undo (edit);
	edit->found_len = 0;
	edit->prev_col = edit_get_col (edit);
	edit->search_start = edit->curs1;
	return 1;
    }
/* An ordinary key press */
    if (char_for_insertion >= 0) {
	if (edit->overwrite) {
	    if (edit_get_byte (edit, edit->curs1) != '\n')
		edit_delete (edit);
	}
	edit_insert (edit, char_for_insertion);
	if (option_auto_para_formatting) {
	    format_paragraph (edit, 0);
	    edit->force |= REDRAW_PAGE;
	} else
	    check_and_wrap_line (edit);
	edit->found_len = 0;
	edit->prev_col = edit_get_col (edit);
	edit->search_start = edit->curs1;
	edit_find_bracket (edit);
	return 1;
    }
    switch (command) {
    case CK_Begin_Page:
    case CK_End_Page:
    case CK_Begin_Page_Highlight:
    case CK_End_Page_Highlight:
    case CK_Word_Left:
    case CK_Word_Right:
    case CK_Up:
    case CK_Down:
    case CK_Word_Left_Highlight:
    case CK_Word_Right_Highlight:
    case CK_Up_Highlight:
    case CK_Down_Highlight:
	if (edit->mark2 == -1)
	    break;		/*marking is following the cursor: may need to highlight a whole line */
    case CK_Left:
    case CK_Right:
    case CK_Left_Highlight:
    case CK_Right_Highlight:
	edit->force |= REDRAW_CHAR_ONLY;
    }

/* basic cursor key commands */
    switch (command) {
    case CK_BackSpace:
	if (option_backspace_through_tabs && is_in_indent (edit)) {
	    while (edit_get_byte (edit, edit->curs1 - 1) != '\n'
		   && edit->curs1 > 0)
		edit_backspace (edit);
	    break;
	} else {
	    if (option_fake_half_tabs) {
		int i;
		if (is_in_indent (edit) && right_of_four_spaces (edit)) {
		    for (i = 0; i < HALF_TAB_SIZE; i++)
			edit_backspace (edit);
		    break;
		}
	    }
	}
	edit_backspace (edit);
	break;
    case CK_Delete:
	if (option_fake_half_tabs) {
	    int i;
	    if (is_in_indent (edit) && left_of_four_spaces (edit)) {
		for (i = 1; i <= HALF_TAB_SIZE; i++)
		    edit_delete (edit);
		break;
	    }
	}
	edit_delete (edit);
	break;
    case CK_Delete_Word_Left:
	edit_left_delete_word (edit);
	break;
    case CK_Delete_Word_Right:
	edit_right_delete_word (edit);
	break;
    case CK_Delete_Line:
	edit_delete_line (edit);
	break;
    case CK_Delete_To_Line_End:
	edit_delete_to_line_end (edit);
	break;
    case CK_Delete_To_Line_Begin:
	edit_delete_to_line_begin (edit);
	break;
    case CK_Enter:
	if (option_auto_para_formatting) {
	    edit_double_newline (edit);
	    if (option_return_does_auto_indent)
		edit_auto_indent (edit, 0);
	    format_paragraph (edit, 0);
	} else if (option_return_does_auto_indent) {
	    edit_insert (edit, '\n');
	    edit_auto_indent (edit, 0);
	} else {
	    edit_insert (edit, '\n');
	}
	break;
    case CK_Return:
	edit_insert (edit, '\n');
	break;

    case CK_Page_Up:
    case CK_Page_Up_Highlight:
	edit_move_up (edit, edit->num_widget_lines - 1, 1);
	break;
    case CK_Page_Down:
    case CK_Page_Down_Highlight:
	edit_move_down (edit, edit->num_widget_lines - 1, 1);
	break;
    case CK_Left:
    case CK_Left_Highlight:
	if (option_fake_half_tabs) {
	    if (is_in_indent (edit) && right_of_four_spaces (edit)) {
		edit_cursor_move (edit, -HALF_TAB_SIZE);
		edit->force &= (0xFFF - REDRAW_CHAR_ONLY);
		break;
	    }
	}
	edit_cursor_move (edit, -1);
	break;
    case CK_Right:
    case CK_Right_Highlight:
	if (option_fake_half_tabs) {
	    if (is_in_indent (edit) && left_of_four_spaces (edit)) {
		edit_cursor_move (edit, HALF_TAB_SIZE);
		edit->force &= (0xFFF - REDRAW_CHAR_ONLY);
		break;
	    }
	}
	edit_cursor_move (edit, 1);
	break;
    case CK_Begin_Page:
    case CK_Begin_Page_Highlight:
	edit_begin_page (edit);
	break;
    case CK_End_Page:
    case CK_End_Page_Highlight:
	edit_end_page (edit);
	break;
    case CK_Word_Left:
    case CK_Word_Left_Highlight:
	edit_left_word_move_cmd (edit);
	break;
    case CK_Word_Right:
    case CK_Word_Right_Highlight:
	edit_right_word_move_cmd (edit);
	break;
    case CK_Up:
    case CK_Up_Highlight:
	edit_move_up (edit, 1, 0);
	break;
    case CK_Down:
    case CK_Down_Highlight:
	edit_move_down (edit, 1, 0);
	break;
    case CK_Paragraph_Up:
    case CK_Paragraph_Up_Highlight:
	edit_move_up_paragraph (edit, 0);
	break;
    case CK_Paragraph_Down:
    case CK_Paragraph_Down_Highlight:
	edit_move_down_paragraph (edit, 0);
	break;
    case CK_Scroll_Up:
    case CK_Scroll_Up_Highlight:
	edit_move_up (edit, 1, 1);
	break;
    case CK_Scroll_Down:
    case CK_Scroll_Down_Highlight:
	edit_move_down (edit, 1, 1);
	break;
    case CK_Home:
    case CK_Home_Highlight:
	edit_cursor_to_bol (edit);
	break;
    case CK_End:
    case CK_End_Highlight:
	edit_cursor_to_eol (edit);
	break;

    case CK_Tab:
	edit_tab_cmd (edit);
	if (option_auto_para_formatting) {
	    format_paragraph (edit, 0);
	    edit->force |= REDRAW_PAGE;
	} else
	    check_and_wrap_line (edit);
	break;

    case CK_Toggle_Insert:
	edit->overwrite = (edit->overwrite == 0);
#ifndef MIDNIGHT
	CSetCursorColor (edit->overwrite ? color_palette (24) : color_palette (19));
#endif
	break;

    case CK_Mark:
	edit_mark_cmd (edit, 0);
	break;
    case CK_Unmark:
	edit_mark_cmd (edit, 1);
	break;

    case CK_Beginning_Of_Text:
    case CK_Beginning_Of_Text_Highlight:
	edit_move_to_top (edit);
	break;
    case CK_End_Of_Text:
    case CK_End_Of_Text_Highlight:
	edit_move_to_bottom (edit);
	break;

    case CK_Copy:
	edit_block_copy_cmd (edit);
	break;
    case CK_Remove:
	edit_block_delete_cmd (edit);
	break;
    case CK_Move:
	edit_block_move_cmd (edit);
	break;

    case CK_XStore:
	edit_copy_to_X_buf_cmd (edit);
	break;
    case CK_XCut:
	edit_cut_to_X_buf_cmd (edit);
	break;
    case CK_XPaste:
	edit_paste_from_X_buf_cmd (edit);
	break;
    case CK_Selection_History:
	edit_paste_from_history (edit);
	break;

    case CK_Save_As:
#ifndef MIDNIGHT
	if (edit->widget->options & EDITOR_NO_FILE)
	    break;
#endif
	edit_save_as_cmd (edit);
	break;
    case CK_Save:
#ifndef MIDNIGHT
	if (edit->widget->options & EDITOR_NO_FILE)
	    break;
#endif
	edit_save_confirm_cmd (edit);
	break;
    case CK_Load:
#ifndef MIDNIGHT
	if (edit->widget->options & EDITOR_NO_FILE)
	    break;
#endif
	edit_load_cmd (edit);
	break;
    case CK_Save_Block:
	edit_save_block_cmd (edit);
	break;
    case CK_Insert_File:
	edit_insert_file_cmd (edit);
	break;

    case CK_Find:
	edit_search_cmd (edit, 0);
	break;
    case CK_Find_Again:
	edit_search_cmd (edit, 1);
	break;
    case CK_Replace:
	edit_replace_cmd (edit, 0);
	break;
    case CK_Replace_Again:
	edit_replace_cmd (edit, 1);
	break;

    case CK_Exit:
	edit_quit_cmd (edit);
	break;
    case CK_New:
	edit_new_cmd (edit);
	break;

    case CK_Help:
	edit_help_cmd (edit);
	break;

    case CK_Refresh:
	edit_refresh_cmd (edit);
	break;

    case CK_Date:{
	    time_t t;
	    time (&t);
	    edit_printf (edit, ctime (&t));
	    edit->force |= REDRAW_PAGE;
	    break;
	}
    case CK_Goto:
	edit_goto_cmd (edit);
	break;
    case CK_Paragraph_Format:
	format_paragraph (edit, 1);
	edit->force |= REDRAW_PAGE;
	break;
    case CK_Delete_Macro:
	edit_delete_macro_cmd (edit);
	break;
#ifdef MIDNIGHT
    case CK_Sort:
	edit_sort_cmd (edit);
	break;
    case CK_Mail:
	edit_mail_dialog (edit);
	break;
#endif

/* These commands are not handled and must be handled by the user application */
#ifndef MIDNIGHT
    case CK_Sort:
    case CK_Mail:
#endif
    case CK_Complete:
    case CK_Cancel:
    case CK_Save_Desktop:
    case CK_New_Window:
    case CK_Cycle:
    case CK_Menu:
    case CK_Save_And_Quit:
    case CK_Check_Save_And_Quit:
    case CK_Run_Another:
	result = 0;
	break;
    }

#ifdef MIDNIGHT
/* CK_Pipe_Block */
    if ((command / 1000) == 1)	/* a shell command */
	edit_block_process_cmd (edit, shell_cmd[command - 1000], 1);
#else
    if ((command / 1000) == 1)	/* a user defined command */
	if (user_commamd)
	    (*user_commamd) (edit, command - 1000);
#endif

    if (command > CK_Macro (0) && command <= CK_Last_Macro) {	/* a macro command */
	struct macro m[MAX_MACRO_LENGTH];
	int nm;
	if ((result = edit_load_macro_cmd (edit, m, &nm, command - 2000)))
	    edit_execute_macro (edit, m, nm);
    }
/* keys which must set the col position, and the search vars */
    switch (command) {
    case CK_Find:
    case CK_Find_Again:
    case CK_Replace:
    case CK_Replace_Again:
	edit->prev_col = edit_get_col (edit);
	return 1;
	break;
    case CK_Up:
    case CK_Up_Highlight:
    case CK_Down:
    case CK_Down_Highlight:
    case CK_Page_Up:
    case CK_Page_Up_Highlight:
    case CK_Page_Down:
    case CK_Page_Down_Highlight:
    case CK_Beginning_Of_Text:
    case CK_Beginning_Of_Text_Highlight:
    case CK_End_Of_Text:
    case CK_End_Of_Text_Highlight:
    case CK_Paragraph_Up:
    case CK_Paragraph_Up_Highlight:
    case CK_Paragraph_Down:
    case CK_Paragraph_Down_Highlight:
    case CK_Scroll_Up:
    case CK_Scroll_Up_Highlight:
    case CK_Scroll_Down:
    case CK_Scroll_Down_Highlight:
	edit->search_start = edit->curs1;
	edit->found_len = 0;
	edit_find_bracket (edit);
	return 1;
	break;
    default:
	edit->found_len = 0;
	edit->prev_col = edit_get_col (edit);
	edit->search_start = edit->curs1;
    }
    edit_find_bracket (edit);

    if (option_auto_para_formatting) {
	switch (command) {
	case CK_BackSpace:
	case CK_Delete:
	case CK_Delete_Word_Left:
	case CK_Delete_Word_Right:
	case CK_Delete_To_Line_End:
	case CK_Delete_To_Line_Begin:
	    format_paragraph (edit, 0);
	    edit->force |= REDRAW_PAGE;
	}
    }
    return result;
}


/* either command or char_for_insertion must be passed as -1 */
/* returns 0 if command is a macro that was not found, 1 otherwise */
int edit_execute_command (WEdit * edit, int command, int char_for_insertion)
{
    int r;
    r = edit_execute_cmd (edit, command, char_for_insertion);
    edit_update_screen (edit);
    return r;
}

void edit_execute_macro (WEdit * edit, struct macro macro[], int n)
{
    int i = 0;
    edit->force |= REDRAW_PAGE;
    for (; i < n; i++) {
	edit_execute_cmd (edit, macro[i].command, macro[i].ch);
    }
    edit_update_screen (edit);
}