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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Teruaki Kawashima
*
* 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 "config.h"
#include "plugin.h"
#include "pluginlib_actions.h"
#include "simple_viewer.h"
#include <ctype.h>
struct view_info {
#ifdef HAVE_LCD_BITMAP
struct font* pf;
#endif
const char *title;
const char *text; /* displayed text */
int display_lines; /* number of lines can be displayed */
int line_count; /* number of lines */
int line; /* current fisrt line */
int start; /* possition of first line in text */
};
static const char* get_next_line(const char *text, struct view_info *info)
{
(void) info;
const char *ptr = text;
const char *space = NULL;
int total, n, w;
total = 0;
while(*ptr)
{
#ifdef HAVE_LCD_CHARCELLS
n = rb->utf8seek(ptr, 1);
w = 1;
#else
unsigned short ch;
n = ((long)rb->utf8decode(ptr, &ch) - (long)ptr);
w = rb->font_get_width(info->pf, ch);
#endif
if (isspace(*ptr))
space = ptr+n;
if (*ptr == '\n')
{
ptr += n;
break;
}
if (total + w > LCD_WIDTH)
break;
ptr += n;
total += w;
}
return *ptr && space? space: ptr;
}
static void calc_line_count(struct view_info *info)
{
const char *ptr = info->text;
int i = 0;
while (*ptr)
{
ptr = get_next_line(ptr, info);
i++;
}
info->line_count = i;
}
static void calc_first_line(struct view_info *info, int line)
{
const char *ptr = info->text;
int i = 0;
if (line > info->line_count - info->display_lines)
line = info->line_count - info->display_lines;
if (line < 0)
line = 0;
if (info->line <= line)
{
ptr += info->start;
i = info->line;
}
while (*ptr && i < line)
{
ptr = get_next_line(ptr, info);
i++;
}
info->start = ptr - info->text;
info->line = i;
}
static int init_view(struct view_info *info,
const char *title, const char *text)
{
#ifdef HAVE_LCD_BITMAP
info->pf = rb->font_get(FONT_UI);
info->display_lines = LCD_HEIGHT / info->pf->height;
#else
info->display_lines = LCD_HEIGHT;
#endif
info->title = title;
info->text = text;
info->line_count = 0;
info->line = 0;
info->start = 0;
/* no title for small screens. */
if (info->display_lines < 4)
{
info->title = NULL;
}
else
{
info->display_lines--;
}
calc_line_count(info);
return 0;
}
static void draw_text(struct view_info *info)
{
#ifdef HAVE_LCD_BITMAP
#define OUTPUT_SIZE LCD_WIDTH+1
#else
#define OUTPUT_SIZE LCD_WIDTH*3+1
#endif
static char output[OUTPUT_SIZE];
const char *text, *ptr;
int i, max_show, lines = 0;
/* clear screen */
rb->lcd_clear_display();
/* display title. */
if(info->title)
{
rb->lcd_puts(0, lines, info->title);
lines++;
}
max_show = MIN(info->line_count - info->line, info->display_lines);
text = info->text + info->start;
for (i = 0; i < max_show; i++, lines++)
{
ptr = get_next_line(text, info);
rb->strlcpy(output, text, ptr-text+1);
rb->lcd_puts(0, lines, output);
text = ptr;
}
rb->lcd_update();
}
static void scroll_up(struct view_info *info)
{
if (info->line <= 0)
return;
calc_first_line(info, info->line-1);
draw_text(info);
return;
}
static void scroll_down(struct view_info *info)
{
if (info->line + info->display_lines >= info->line_count)
return;
calc_first_line(info, info->line+1);
draw_text(info);
}
static void scroll_to_top(struct view_info *info)
{
if (info->line <= 0)
return;
calc_first_line(info, 0);
draw_text(info);
}
static void scroll_to_bottom(struct view_info *info)
{
if (info->line + info->display_lines >= info->line_count)
return;
calc_first_line(info, info->line_count - info->display_lines);
draw_text(info);
}
int view_text(const char *title, const char *text)
{
struct view_info info;
const struct button_mapping *view_contexts[] = {
pla_main_ctx,
};
int button;
init_view(&info, title, text);
draw_text(&info);
/* wait for keypress */
while(1)
{
button = pluginlib_getaction(TIMEOUT_BLOCK, view_contexts,
ARRAYLEN(view_contexts));
switch (button)
{
case PLA_UP:
case PLA_UP_REPEAT:
scroll_up(&info);
break;
case PLA_DOWN:
case PLA_DOWN_REPEAT:
scroll_down(&info);
break;
case PLA_LEFT_REPEAT:
scroll_to_top(&info);
break;
case PLA_RIGHT_REPEAT:
scroll_to_bottom(&info);
break;
case PLA_EXIT:
case PLA_CANCEL:
return PLUGIN_OK;
default:
if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
return PLUGIN_USB_CONNECTED;
break;
}
}
return PLUGIN_OK;
}
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