forked from len0rd/rockbox
Added plugin loader. Moved games, demos and the text viewer to loadable plugins. Copy your *.rock files to /.rockbox/rocks/
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@3769 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Björn Stenberg
parent
9bcbe3fd72
commit
ba371fb595
29 changed files with 1869 additions and 1889 deletions
415
apps/plugins/viewer.c
Normal file
415
apps/plugins/viewer.c
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/***************************************************************************
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*
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2002 Gilles Roux
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "plugin.h"
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#define BUFFER_SIZE 1024
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#define OUTSIDE_BUFFER -10
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#define OUTSIDE_FILE -11
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static int fd;
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static int file_size;
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static char buffer[BUFFER_SIZE+1];
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static int buffer_pos; /* Position of the buffer in the file */
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static char display_lines; /* number of lines on the display */
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static char display_columns; /* number of columns on the display */
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static int begin_line; /* Index of the first line displayed on the lcd */
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static int end_line; /* Index of the last line displayed on the lcd */
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static int begin_line_pos; /* Position of the first_line in the bufffer */
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static int end_line_pos; /* Position of the last_line in the buffer */
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static struct plugin_api* rb;
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/*
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* Known issue: The caching algorithm will fail (display incoherent data) if
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* the total space of the lines that are displayed on the screen exceeds the
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* buffer size (only happens with very long lines).
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*/
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static void display_line_count(void)
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{
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#ifdef HAVE_LCD_BITMAP
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int w,h;
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rb->lcd_getstringsize("M", &w, &h);
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display_lines = LCD_HEIGHT / h;
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display_columns = LCD_WIDTH / w;
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#else
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display_lines = 2;
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display_columns = 11;
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#endif
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}
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static int find_next_line(int pos)
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{
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int i;
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if (pos==OUTSIDE_BUFFER || pos==OUTSIDE_FILE)
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return pos;
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i = pos;
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if (buffer_pos+i>=file_size) {
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return OUTSIDE_FILE;
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}
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while (1) {
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i++;
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if (buffer_pos+i==file_size) {
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return i;
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}
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if (i>=BUFFER_SIZE) {
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return OUTSIDE_BUFFER;
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}
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if (buffer[i]==0) {
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return i;
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}
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}
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}
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static int find_prev_line(int pos)
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{
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int i;
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if (pos==OUTSIDE_BUFFER || pos==OUTSIDE_FILE)
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return pos;
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i = pos;
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if (buffer_pos+i<0) {
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return OUTSIDE_FILE;
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}
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while (1) {
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i--;
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if (buffer_pos+i<0) {
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return i;
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}
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if (i<0) {
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return OUTSIDE_BUFFER;
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}
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if (buffer[i]==0) {
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return i;
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}
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}
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}
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static void viewer_draw(int col)
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{
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int i, j;
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char* str;
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int line_pos;
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rb->lcd_clear_display();
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line_pos = begin_line_pos;
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for (i=0; i <= end_line - begin_line; i++) {
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if (line_pos == OUTSIDE_BUFFER ||
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line_pos == OUTSIDE_FILE)
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break;
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str = buffer + line_pos + 1;
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for (j=0; j<col && *str!=0; ++j)
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str++;
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rb->lcd_puts(0, i, str);
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line_pos = find_next_line(line_pos);
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}
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#ifdef HAVE_LCD_BITMAP
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rb->lcd_update();
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#endif
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}
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static void fill_buffer(int pos)
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{
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int i;
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int numread;
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if (pos>=file_size-BUFFER_SIZE)
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pos = file_size-BUFFER_SIZE;
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if (pos<0)
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pos = 0;
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rb->lseek(fd, pos, SEEK_SET);
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numread = rb->read(fd, buffer, BUFFER_SIZE);
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begin_line_pos -= pos - buffer_pos;
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end_line_pos -= pos - buffer_pos;
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buffer_pos = pos;
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buffer[numread] = 0;
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for(i=0;i<numread;i++) {
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switch(buffer[i]) {
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case '\r':
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buffer[i] = ' ';
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break;
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case '\n':
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buffer[i] = 0;
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break;
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default:
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break;
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}
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}
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}
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static bool viewer_init(char* file)
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{
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int i;
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int ret;
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fd = rb->open(file, O_RDONLY);
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if (fd==-1)
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return false;
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file_size = rb->lseek(fd, 0, SEEK_END);
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buffer_pos = 0;
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begin_line = 0;
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begin_line_pos = -1;
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end_line = -1;
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end_line_pos = -1;
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fill_buffer(0);
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display_line_count();
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for (i=0; i<display_lines; ++i) {
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ret = find_next_line(end_line_pos);
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if (ret!=OUTSIDE_FILE && ret!=OUTSIDE_BUFFER) {
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end_line_pos = ret;
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end_line++;
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}
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}
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return true;
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}
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static void viewer_exit(void)
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{
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rb->close(fd);
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}
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static void viewer_scroll_down(void)
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{
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int ret;
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ret = find_next_line(end_line_pos);
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switch ( ret ) {
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case OUTSIDE_BUFFER:
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begin_line_pos = find_next_line(begin_line_pos);
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fill_buffer(begin_line_pos+buffer_pos);
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end_line_pos = find_next_line(end_line_pos);
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break;
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case OUTSIDE_FILE:
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return;
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default:
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begin_line_pos = find_next_line(begin_line_pos);
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end_line_pos = ret;
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break;
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}
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begin_line++;
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end_line++;
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}
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static void viewer_scroll_up(void)
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{
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int ret;
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ret = find_prev_line(begin_line_pos);
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switch ( ret ) {
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case OUTSIDE_BUFFER:
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end_line_pos = find_prev_line(end_line_pos);
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fill_buffer(buffer_pos+end_line_pos-BUFFER_SIZE);
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begin_line_pos = find_prev_line(begin_line_pos);
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break;
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case OUTSIDE_FILE:
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return;
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default:
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end_line_pos = find_prev_line(end_line_pos);
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begin_line_pos = ret;
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break;
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}
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begin_line--;
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end_line--;
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}
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static int pagescroll(int col)
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{
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bool exit = false;
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int i;
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while (!exit) {
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switch (rb->button_get(true)) {
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_ON | BUTTON_UP:
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case BUTTON_ON | BUTTON_UP | BUTTON_REPEAT:
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#else
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case BUTTON_ON | BUTTON_LEFT:
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case BUTTON_ON | BUTTON_LEFT | BUTTON_REPEAT:
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#endif
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for (i=0; i<display_lines; i++)
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viewer_scroll_up();
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break;
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_ON | BUTTON_DOWN:
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case BUTTON_ON | BUTTON_DOWN | BUTTON_REPEAT:
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#else
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case BUTTON_ON | BUTTON_RIGHT:
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case BUTTON_ON | BUTTON_RIGHT | BUTTON_REPEAT:
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#endif
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for (i=0; i<display_lines; i++)
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viewer_scroll_down();
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break;
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_ON | BUTTON_LEFT:
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case BUTTON_ON | BUTTON_LEFT | BUTTON_REPEAT:
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#else
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case BUTTON_ON | BUTTON_MENU | BUTTON_LEFT:
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case BUTTON_ON | BUTTON_MENU | BUTTON_LEFT | BUTTON_REPEAT:
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#endif
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col -= display_columns;
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if (col < 0)
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col = 0;
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break;
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_ON | BUTTON_RIGHT:
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case BUTTON_ON | BUTTON_RIGHT | BUTTON_REPEAT:
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#else
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case BUTTON_ON | BUTTON_MENU | BUTTON_RIGHT:
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case BUTTON_ON | BUTTON_MENU | BUTTON_RIGHT | BUTTON_REPEAT:
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#endif
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col += display_columns;
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break;
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case BUTTON_ON | BUTTON_REL:
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_ON | BUTTON_DOWN | BUTTON_REL:
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case BUTTON_ON | BUTTON_UP | BUTTON_REL:
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#else
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case BUTTON_ON | BUTTON_RIGHT | BUTTON_REL:
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case BUTTON_ON | BUTTON_LEFT | BUTTON_REL:
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case BUTTON_ON | BUTTON_MENU | BUTTON_RIGHT | BUTTON_REL:
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case BUTTON_ON | BUTTON_MENU | BUTTON_LEFT | BUTTON_REL:
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#endif
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exit = true;
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break;
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}
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if ( !exit )
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viewer_draw(col);
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}
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return col;
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}
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enum plugin_status plugin_start(struct plugin_api* api, void* file)
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{
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bool exit=false;
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int button;
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int col = 0;
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int ok;
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TEST_PLUGIN_API(api);
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rb = api;
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if (!file)
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return PLUGIN_ERROR;
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ok = viewer_init(file);
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if (!ok) {
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rb->splash(HZ, 0, false, "Error");
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viewer_exit();
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return PLUGIN_OK;
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}
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viewer_draw(col);
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while (!exit) {
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button = rb->button_get(true);
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switch ( button ) {
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_F1:
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case BUTTON_OFF:
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#else
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case BUTTON_STOP:
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#endif
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viewer_exit();
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exit = true;
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break;
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_UP:
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case BUTTON_UP | BUTTON_REPEAT:
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#else
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case BUTTON_LEFT:
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case BUTTON_LEFT | BUTTON_REPEAT:
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#endif
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viewer_scroll_up();
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viewer_draw(col);
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break;
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_DOWN:
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case BUTTON_DOWN | BUTTON_REPEAT:
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#else
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case BUTTON_RIGHT:
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case BUTTON_RIGHT | BUTTON_REPEAT:
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#endif
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viewer_scroll_down();
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viewer_draw(col);
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break;
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_LEFT:
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case BUTTON_LEFT | BUTTON_REPEAT:
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#else
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case BUTTON_MENU | BUTTON_LEFT:
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case BUTTON_MENU | BUTTON_LEFT | BUTTON_REPEAT:
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#endif
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col--;
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if (col < 0)
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col = 0;
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viewer_draw(col);
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break;
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#ifdef HAVE_RECORDER_KEYPAD
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case BUTTON_RIGHT:
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case BUTTON_RIGHT | BUTTON_REPEAT:
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#else
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case BUTTON_MENU | BUTTON_RIGHT:
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case BUTTON_MENU | BUTTON_RIGHT | BUTTON_REPEAT:
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#endif
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col++;
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viewer_draw(col);
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break;
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case BUTTON_ON:
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#ifdef HAVE_PLAYER_KEYPAD
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case BUTTON_ON | BUTTON_MENU:
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#endif
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col = pagescroll(col);
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break;
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case SYS_USB_CONNECTED:
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rb->usb_screen();
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viewer_exit();
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return PLUGIN_USB_CONNECTED;
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}
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}
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return PLUGIN_OK;
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}
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