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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2002 Gilles Roux
* 2003 Garrett Derner
* 2010 Yoshihisa Uchida
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "plugin.h"
#include "tv_bookmark.h"
#include "tv_display.h"
#include "tv_preferences.h"
#include "tv_screen_pos.h"
#include "tv_text_reader.h"
#include "tv_window.h"
static int window_width;
static int window_columns;
static int display_lines;
static int cur_window;
static int cur_column;
static void tv_draw_bookmarks(const struct tv_screen_pos *top_pos)
{
struct tv_screen_pos bookmarks[TV_MAX_BOOKMARKS];
int disp_bookmarks[TV_MAX_BOOKMARKS];
int count = tv_get_bookmark_positions(bookmarks);
int disp_count = 0;
int line;
while (count--)
{
line = (bookmarks[count].page - top_pos->page) * display_lines
+ (bookmarks[count].line - top_pos->line);
if (line >= 0 && line < display_lines)
disp_bookmarks[disp_count++] = line;
}
tv_show_bookmarks(disp_bookmarks, disp_count);
}
void tv_draw_window(void)
{
struct tv_screen_pos pos;
const unsigned char *text_buf;
int line;
int size = 0;
tv_copy_screen_pos(&pos);
tv_start_display();
tv_read_start(cur_window, (cur_column > 0));
for (line = 0; line < display_lines; line++)
{
if (!tv_get_next_line(&text_buf))
break;
tv_draw_text(line, text_buf, cur_column);
}
size = tv_read_end();
tv_draw_bookmarks(&pos);
tv_update_extra(cur_window, cur_column, &pos, size);
tv_end_display();
}
bool tv_traverse_lines(void)
{
int i;
bool res = true;
tv_read_start(0, false);
for (i = 0; i < display_lines; i++)
{
if (!tv_get_next_line(NULL))
{
res = false;
break;
}
}
tv_read_end();
return res;
}
static int tv_change_preferences(const struct tv_preferences *oldp)
{
bool need_scrollbar = false;
(void)oldp;
tv_set_layout(need_scrollbar);
tv_get_drawarea_info(&window_width, &window_columns, &display_lines);
if (tv_exist_scrollbar())
{
tv_seek_top();
tv_set_read_conditions(preferences->windows, window_width);
if (tv_traverse_lines() &&
(preferences->vertical_scrollbar || preferences->horizontal_scrollbar))
{
need_scrollbar = true;
tv_set_layout(need_scrollbar);
tv_get_drawarea_info(&window_width, &window_columns, &display_lines);
}
tv_seek_top();
tv_init_scrollbar(tv_get_total_text_size(), need_scrollbar);
}
if (cur_window >= preferences->windows)
cur_window = 0;
cur_column = 0;
tv_set_read_conditions(preferences->windows, window_width);
return TV_CALLBACK_OK;
}
bool tv_init_window(unsigned char **buf, size_t *size)
{
tv_add_preferences_change_listner(tv_change_preferences);
return tv_init_display(buf, size) && tv_init_text_reader(buf, size);
}
void tv_finalize_window(void)
{
tv_finalize_text_reader();
tv_finalize_display();
}
void tv_move_window(int window_delta, int column_delta)
{
cur_window += window_delta;
cur_column += column_delta;
if (cur_window < 0)
{
cur_window = 0;
cur_column = 0;
}
else if (cur_window >= preferences->windows)
{
cur_window = preferences->windows - 1;
cur_column = 0;
}
if (cur_column < 0)
{
if (cur_window == 0)
cur_column = 0;
else
{
cur_window--;
cur_column = window_columns - 1;
}
}
else
{
if (cur_window == preferences->windows - 1)
cur_column = 0;
else if (cur_column >= window_columns)
{
cur_window++;
cur_column = 0;
}
}
}
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