/* editor initialisation and callback handler.

   Copyright (C) 1996, 1997 the Free Software Foundation

   Authors: 1996, 1997 Paul Sheer

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307, USA.
 */

#include <config.h>
#include "edit.h"

WEdit *wedit;
Dlg_head *edit_dlg;
WMenu *edit_menubar;

int column_highlighting = 0;

static int edit_callback (Dlg_head * h, WEdit * edit, int msg, int par);

static int edit_mode_callback (struct Dlg_head *h, int id, int msg)
{
    return 0;
}

int edit_event (WEdit * edit, Gpm_Event * event, int *result)
{
    *result = MOU_NORMAL;
    edit_update_curs_row (edit);
    edit_update_curs_col (edit);
    if (event->type & (GPM_DOWN | GPM_DRAG | GPM_UP)) {
	if (event->y > 1 && event->x > 0
	    && event->x <= edit->num_widget_columns
	    && event->y <= edit->num_widget_lines + 1) {
	    if (edit->mark2 != -1 && event->type & (GPM_UP | GPM_DRAG))
		return 1;	/* a lone up mustn't do anything */
	    if (event->type & (GPM_DOWN | GPM_UP))
		edit_push_key_press (edit);
	    edit_cursor_move (edit, edit_bol (edit, edit->curs1) - edit->curs1);
	    if (--event->y > (edit->curs_row + 1))
		edit_cursor_move (edit,
				  edit_move_forward (edit, edit->curs1, event->y - (edit->curs_row + 1), 0)
				  - edit->curs1);
	    if (event->y < (edit->curs_row + 1))
		edit_cursor_move (edit,
				  +edit_move_backward (edit, edit->curs1, (edit->curs_row + 1) - event->y)
				  - edit->curs1);
	    edit_cursor_move (edit, (int) edit_move_forward3 (edit, edit->curs1,
		       event->x - edit->start_col - 1, 0) - edit->curs1);
	    edit->prev_col = edit_get_col (edit);
	    if (event->type & GPM_DOWN) {
		edit_mark_cmd (edit, 1);	/* reset */
		edit->highlight = 0;
	    }
	    if (!(event->type & GPM_DRAG))
		edit_mark_cmd (edit, 0);
	    edit->force |= REDRAW_COMPLETELY;
	    edit_update_curs_row (edit);
	    edit_update_curs_col (edit);
	    edit_update_screen (edit);
	    return 1;
	}
    }
    return 0;
}



int menubar_event (Gpm_Event * event, WMenu * menubar);		/* menu.c */

int edit_mouse_event (Gpm_Event * event, void *x)
{
    int result;
    if (edit_event ((WEdit *) x, event, &result))
	return result;
    else
	return menubar_event (event, edit_menubar);
}

int edit (const char *_file, int line)
{
    static int made_directory = 0;
    int framed = 0;
    int midnight_colors[4];
    char *text = 0;
    WButtonBar *edit_bar;

    if (option_backup_ext_int != -1) {
	option_backup_ext = malloc (sizeof (int) + 1);
	option_backup_ext[sizeof (int)] = '\0';
	memcpy (option_backup_ext, (char *) &option_backup_ext_int, sizeof (int));
    }
    if (!made_directory) {
	mkdir (catstrs (home_dir, EDIT_DIR, 0), 0700);
	made_directory = 1;
    }
    if (_file) {
	if (!(*_file)) {
	    _file = 0;
	    text = "";
	}
    } else
	text = "";

    if (!(wedit = edit_init (NULL, LINES - 2, COLS, _file, text, "", 0))) {
	return 0;
    }
    wedit->macro_i = -1;

    /* Create a new dialog and add it widgets to it */
    edit_dlg = create_dlg (0, 0, LINES, COLS, midnight_colors,
			   edit_mode_callback, "[Internal File Editor]",
			   "edit",
			   DLG_NONE);

    edit_dlg->raw = 1;		/*so that tab = '\t' key works */

    init_widget (&(wedit->widget), 0, 0, LINES - 1, COLS,
		 (callback_fn) edit_callback,
		 (destroy_fn) edit_clean,
		 (mouse_h) edit_mouse_event, 0);

    widget_want_cursor (wedit->widget, 1);

    edit_bar = buttonbar_new (1);

    if (!framed) {
	switch (edit_key_emulation) {
	case EDIT_KEY_EMULATION_NORMAL:
	    edit_init_menu_normal ();	/* editmenu.c */
	    break;
	case EDIT_KEY_EMULATION_EMACS:
	    edit_init_menu_emacs ();	/* editmenu.c */
	    break;
	}
	edit_menubar = menubar_new (0, 0, COLS, EditMenuBar, N_menus);
    }
    add_widget (edit_dlg, wedit);

    if (!framed)
	add_widget (edit_dlg, edit_menubar);

    add_widget (edit_dlg, edit_bar);
    edit_move_display (wedit, line - 1);
    edit_move_to_line (wedit, line - 1);

    run_dlg (edit_dlg);

    if (!framed)
	edit_done_menu ();	/* editmenu.c */

    destroy_dlg (edit_dlg);

    return 1;
}

static void edit_my_define (Dlg_head * h, int idx, char *text,
			    void (*fn) (WEdit *), WEdit * edit)
{
    define_label_data (h, (Widget *) edit, idx, text, (buttonbarfn) fn, edit);
}


static void cmd_F1 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (1));
}

static void cmd_F2 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (2));
}

static void cmd_F3 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (3));
}

static void cmd_F4 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (4));
}

static void cmd_F5 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (5));
}

static void cmd_F6 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (6));
}

static void cmd_F7 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (7));
}

static void cmd_F8 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (8));
}

#if 0
static void cmd_F9 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (9));
}
#endif

static void cmd_F10 (WEdit * edit)
{
    send_message (edit->widget.parent, (Widget *) edit, WIDGET_KEY, KEY_F (10));
}

void edit_labels (WEdit * edit)
{
    Dlg_head *h = edit->widget.parent;

    edit_my_define (h, 1, _ ("Help"), cmd_F1, edit);
    edit_my_define (h, 2, _ ("Save"), cmd_F2, edit);
    edit_my_define (h, 3, _ ("Mark"), cmd_F3, edit);
    edit_my_define (h, 4, _ ("Replac"), cmd_F4, edit);
    edit_my_define (h, 5, _ ("Copy"), cmd_F5, edit);
    edit_my_define (h, 6, _ ("Move"), cmd_F6, edit);
    edit_my_define (h, 7, _ ("Search"), cmd_F7, edit);
    edit_my_define (h, 8, _ ("Delete"), cmd_F8, edit);
    if (!edit->have_frame)
	edit_my_define (h, 9, _ ("PullDn"), edit_menu_cmd, edit);
    edit_my_define (h, 10, _ ("Quit"), cmd_F10, edit);

    redraw_labels (h, (Widget *) edit);
}


long get_key_state (void)
{
    return (long) get_modifier ();
}

void edit_adjust_size (Dlg_head * h)
{
    WEdit *edit;
    WButtonBar *edit_bar;

    edit = (WEdit *) find_widget_type (h, (callback_fn) edit_callback);
    edit_bar = (WButtonBar *) edit->widget.parent->current->next->widget;
    widget_set_size (&edit->widget, 0, 0, LINES - 1, COLS);
    widget_set_size (&edit_bar->widget, LINES - 1, 0, 1, COLS);
    widget_set_size (&edit_menubar->widget, 0, 0, 1, COLS);

#ifdef RESIZABLE_MENUBAR
    menubar_arrange (edit_menubar);
#endif
}

void edit_update_screen (WEdit * e)
{
    edit_scroll_screen_over_cursor (e);

    edit_update_curs_col (e);
    edit_status (e);

/* pop all events for this window for internal handling */

    if (!is_idle ()) {
	e->force |= REDRAW_PAGE;
	return;
    }
    if (e->force & REDRAW_COMPLETELY)
	e->force |= REDRAW_PAGE;
    edit_render_keypress (e);
}

static int edit_callback (Dlg_head * h, WEdit * e, int msg, int par)
{
    switch (msg) {
    case WIDGET_INIT:
	e->force |= REDRAW_COMPLETELY;
	edit_labels (e);
	break;
    case WIDGET_DRAW:
	e->force |= REDRAW_COMPLETELY;
	e->num_widget_lines = LINES - 2;
	e->num_widget_columns = COLS;
    case WIDGET_FOCUS:
	edit_update_screen (e);
	return 1;
    case WIDGET_KEY:{
	    int cmd, ch;
	    if (edit_drop_hotkey_menu (e, par))		/* first check alt-f, alt-e, alt-s, etc for drop menus */
		return 1;
	    if (!edit_translate_key (e, 0, par, get_key_state (), &cmd, &ch))
		return 0;
	    edit_execute_key_command (e, cmd, ch);
	    edit_update_screen (e);
	}
	return 1;
    case WIDGET_COMMAND:
	edit_execute_key_command (e, par, -1);
	edit_update_screen (e);
	return 1;
    case WIDGET_CURSOR:
	widget_move (&e->widget, e->curs_row + EDIT_TEXT_VERTICAL_OFFSET, e->curs_col + e->start_col);
	return 1;
    }
    return default_proc (h, msg, par);
}