734 lines
18 KiB
C
734 lines
18 KiB
C
/***************************************************************************
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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) 2017 Franklin Wei
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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/* ideas for improvement:
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* hyphenation of long words */
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#include "plugin.h"
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#include "fixedpoint.h"
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#include "lib/helper.h"
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#include "lib/pluginlib_actions.h"
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#include "lib/pluginlib_exit.h"
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#define LINE_LEN 1024
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#define WORD_MAX 64
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#define MIN_WPM 100
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#define MAX_WPM 1000
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#define DEF_WPM 250
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#define WPM_INCREMENT 25
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/* mininum bytes to skip when seeking */
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#define SEEK_INTERVAL 100
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#define FOCUS_X (7 * LCD_WIDTH / 20)
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#define FOCUS_Y 0
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#define FRAME_COLOR LCD_BLACK
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#define BACKGROUND_COLOR LCD_WHITE /* inside frame */
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#ifdef HAVE_LCD_COLOR
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#define WORD_COLOR LCD_RGBPACK(48,48,48)
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#define FOCUS_COLOR LCD_RGBPACK(204,0,0)
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#define OUTSIDE_COLOR LCD_RGBPACK(128,128,128)
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#define BAR_COLOR LCD_RGBPACK(230,230,230)
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#else
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#define WORD_COLOR LCD_BLACK
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#define OUTSIDE_COLOR BACKGROUND_COLOR
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#endif
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#define BOOKMARK_FILE VIEWERS_DATA_DIR "/speedread.dat"
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#define CONFIG_FILE VIEWERS_DATA_DIR "/speedread.cfg"
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#define ANIM_TIME (75 * HZ / 100)
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int fd = -1; /* -1 = prescripted demo */
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int word_num; /* which word on a line */
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off_t line_offs, begin_offs; /* offsets from the "real" beginning of the file to the current line and end of BOM */
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int line_len = -1, custom_font = FONT_UI;
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const char *last_word = NULL;
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static const char *get_next_word(void)
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{
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if(fd >= 0)
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{
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static char line_buf[LINE_LEN];
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static char *end = NULL;
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next_line:
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if(line_len < 0)
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{
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line_offs = rb->lseek(fd, 0, SEEK_CUR);
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line_len = rb->read_line(fd, line_buf, LINE_LEN);
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if(line_len <= 0)
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return NULL;
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char *word = rb->strtok_r(line_buf, " ", &end);
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word_num = 0;
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if(!word)
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goto next_line;
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else
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{
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last_word = word;
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return word;
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}
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}
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char *word = rb->strtok_r(NULL, " ", &end);
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if(!word)
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{
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/* end of line */
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line_len = -1;
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goto next_line;
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}
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++word_num;
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last_word = word;
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return word;
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}
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else
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{
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/* feed the user a quick demo */
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static const char *words[] = { "This", "plugin", "is", "for", "speed-reading", "plain", "text", "files.",
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"Please", "open", "a", "plain", "text", "file", "to", "read", "by", "using", "the", "context", "menu.",
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"Have", "a", "nice", "day!" };
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static unsigned idx = 0;
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if(idx + 1 > ARRAYLEN(words))
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return NULL;
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last_word = words[idx++];
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return last_word;
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}
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}
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static const char *get_last_word(void)
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{
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if(last_word)
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return last_word;
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else
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{
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last_word = get_next_word();
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return last_word;
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}
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}
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static void cleanup(void)
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{
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if(custom_font != FONT_UI)
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rb->font_unload(custom_font);
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backlight_use_settings();
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}
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/* returns height of drawn area */
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static int reset_drawing(long proportion) /* 16.16 fixed point, goes from 0 --> 1 over time */
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{
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int w, h;
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rb->lcd_getstringsize("X", &w, &h);
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/* clear word area */
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rb->lcd_set_foreground(BACKGROUND_COLOR);
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rb->lcd_fillrect(0, 0, LCD_WIDTH, h * 3 / 2);
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if(proportion)
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{
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#ifdef HAVE_LCD_COLOR
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rb->lcd_set_foreground(BAR_COLOR);
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#endif
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rb->lcd_fillrect(fp_mul(proportion, FOCUS_X << 16, 16) >> 16, FOCUS_Y, fp_mul((1 << 16) - proportion, LCD_WIDTH << 16, 16) >> 16, h * 3 / 2);
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}
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rb->lcd_set_foreground(FRAME_COLOR);
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/* draw frame */
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rb->lcd_fillrect(0, h * 3 / 2, LCD_WIDTH, w / 2);
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rb->lcd_fillrect(FOCUS_X - w / 4, FOCUS_Y + h * 5 / 4, w / 2, h / 2);
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rb->lcd_set_foreground(WORD_COLOR);
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return h * 3 / 2 + w / 2;
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}
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static void render_word(const char *word, int focus)
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{
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/* focus char first */
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char buf[5] = { 0, 0, 0, 0, 0 };
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int idx = rb->utf8seek(word, focus);
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rb->memcpy(buf, word + idx, MIN(rb->utf8seek(word, focus + 1) - idx, 4));
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int focus_w;
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rb->lcd_getstringsize(buf, &focus_w, NULL);
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#ifdef HAVE_LCD_COLOR
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rb->lcd_set_foreground(FOCUS_COLOR);
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#endif
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rb->lcd_putsxy(FOCUS_X - focus_w / 2, FOCUS_Y, buf);
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#ifdef HAVE_LCD_COLOR
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rb->lcd_set_foreground(WORD_COLOR);
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#endif
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/* figure out how far left to shift */
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static char half[WORD_MAX];
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rb->strlcpy(half, word, rb->utf8seek(word, focus + 1));
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int w;
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rb->lcd_getstringsize(half, &w, NULL);
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int x = FOCUS_X - focus_w / 2 - w;
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/* first half */
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rb->lcd_putsxy(x, FOCUS_Y, half);
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/* second half */
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x = FOCUS_X + focus_w / 2;
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rb->lcd_putsxy(x, FOCUS_Y, word + rb->utf8seek(word, focus + 1));
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}
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static int calculate_focus(const char *word)
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{
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#if 0
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int len = rb->utf8length(word);
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int focus = -1;
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for(int i = len / 5; i < len / 2; ++i)
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{
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switch(tolower(word[rb->utf8seek(word, i)]))
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{
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case 'a': case 'e': case 'i': case 'o': case 'u':
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focus = i;
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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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if(focus < 0)
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focus = len / 2;
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return focus;
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#else
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int len = rb->utf8length(word);
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if(rb->utf8length(word) > 13)
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return 4;
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else
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{
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int tab[] = {0,1,1,1,1,2,2,2,2,3,3,3,3};
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return tab[len - 1];
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}
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#endif
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}
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static int calculate_delay(const char *word, int wpm)
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{
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long base = 60 * HZ / wpm;
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long timeout = base;
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int len = rb->utf8length(word);
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if(len > 6)
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timeout += base / 5 * (len - 6);
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if(rb->strchr(word, ',') || rb->strchr(word, '-'))
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timeout += base / 2;
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if(rb->strchr(word, '.') || rb->strchr(word, '!') || rb->strchr(word, '?') || rb->strchr(word, ';'))
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timeout += 3 * base / 2;
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return timeout;
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}
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static long render_screen(const char *word, int wpm)
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{
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/* significant inspiration taken from spread0r */
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long timeout = calculate_delay(word, wpm);
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int focus = calculate_focus(word);
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rb->lcd_setfont(custom_font);
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int h = reset_drawing(0);
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render_word(word, focus);
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rb->lcd_setfont(FONT_UI);
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rb->lcd_update_rect(0, 0, LCD_WIDTH, h);
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return timeout;
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}
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static void begin_anim(void)
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{
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long start = *rb->current_tick;
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long end = start + ANIM_TIME;
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const char *word = get_last_word();
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int focus = calculate_focus(word);
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rb->lcd_setfont(custom_font);
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while(*rb->current_tick < end)
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{
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int h = reset_drawing(fp_div((*rb->current_tick - start) << 16, ANIM_TIME << 16, 16));
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render_word(word, focus);
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rb->lcd_update_rect(0, 0, LCD_WIDTH, h);
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}
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rb->lcd_setfont(FONT_UI);
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}
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static void init_drawing(void)
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{
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backlight_ignore_timeout();
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atexit(cleanup);
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rb->lcd_set_background(OUTSIDE_COLOR);
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rb->lcd_set_backdrop(NULL);
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rb->lcd_set_drawmode(DRMODE_FG);
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rb->lcd_clear_display();
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rb->lcd_update();
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}
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enum { NOTHING = 0, SLOWER, FASTER, FFWD, BACK, PAUSE, QUIT };
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static const struct button_mapping *plugin_contexts[] = { pla_main_ctx };
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static int get_useraction(void)
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{
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int button = pluginlib_getaction(0, plugin_contexts, ARRAYLEN(plugin_contexts));
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switch(button)
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{
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#ifdef HAVE_SCROLLWHEEL
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case PLA_SCROLL_FWD:
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case PLA_SCROLL_FWD_REPEAT:
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#else
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case PLA_UP:
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#endif
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return FASTER;
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#ifdef HAVE_SCROLLWHEEL
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case PLA_SCROLL_BACK:
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case PLA_SCROLL_BACK_REPEAT:
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#else
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case PLA_DOWN:
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#endif
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return SLOWER;
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case PLA_SELECT:
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return PAUSE;
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case PLA_CANCEL:
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return QUIT;
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case PLA_LEFT_REPEAT:
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case PLA_LEFT:
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return BACK;
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case PLA_RIGHT_REPEAT:
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case PLA_RIGHT:
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return FFWD;
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default:
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exit_on_usb(button); /* handle poweroff and USB events */
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return 0;
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}
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}
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static void save_bookmark(const char *fname, int wpm)
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{
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if(!fname)
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return;
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rb->splash(0, "Saving...");
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/* copy every line except the one to be changed */
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int bookmark_fd = rb->open(BOOKMARK_FILE, O_RDONLY);
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int tmp_fd = rb->open(BOOKMARK_FILE ".tmp", O_WRONLY | O_CREAT | O_TRUNC, 0666);
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if(bookmark_fd >= 0)
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{
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while(1)
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{
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/* space for the filename, 3, integers, and a null */
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static char line[MAX_PATH + 1 + 10 + 1 + 10 + 1 + 10 + 1];
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int len = rb->read_line(bookmark_fd, line, sizeof(line));
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if(len <= 0)
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break;
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char *end;
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rb->strtok_r(line, " ", &end);
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rb->strtok_r(NULL, " ", &end);
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rb->strtok_r(NULL, " ", &end);
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char *bookmark_name = rb->strtok_r(NULL, "", &end);
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if(!bookmark_name)
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continue; /* avoid crash */
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if(rb->strcmp(fname, bookmark_name))
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{
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/* go back and clean up after strtok */
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for(int i = 0; i < len - 1; ++i)
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if(!line[i])
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line[i] = ' ';
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rb->write(tmp_fd, line, len);
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rb->fdprintf(tmp_fd, "\n");
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}
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}
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rb->close(bookmark_fd);
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}
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rb->fdprintf(tmp_fd, "%ld %d %d %s\n", line_offs, word_num, wpm, fname);
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rb->close(tmp_fd);
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rb->rename(BOOKMARK_FILE ".tmp", BOOKMARK_FILE);
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}
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static bool load_bookmark(const char *fname, int *wpm)
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{
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int bookmark_fd = rb->open(BOOKMARK_FILE, O_RDONLY);
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if(bookmark_fd >= 0)
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{
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while(1)
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{
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/* space for the filename, 2 integers, and a null */
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char line[MAX_PATH + 1 + 10 + 1 + 10 + 1];
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int len = rb->read_line(bookmark_fd, line, sizeof(line));
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if(len <= 0)
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break;
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char *end;
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char *tok = rb->strtok_r(line, " ", &end);
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if(!tok)
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continue;
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off_t offs = rb->atoi(tok);
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tok = rb->strtok_r(NULL, " ", &end);
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if(!tok)
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continue;
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int word = rb->atoi(tok);
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tok = rb->strtok_r(NULL, " ", &end);
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if(!tok)
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continue;
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*wpm = rb->atoi(tok);
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if(*wpm < MIN_WPM)
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*wpm = MIN_WPM;
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if(*wpm > MAX_WPM)
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*wpm = MAX_WPM;
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char *bookmark_name = rb->strtok_r(NULL, "", &end);
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if(!bookmark_name)
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continue;
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if(!rb->strcmp(fname, bookmark_name))
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{
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rb->lseek(fd, offs, SEEK_SET);
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for(int i = 0; i < word; ++i)
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get_next_word();
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rb->close(bookmark_fd);
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return true;
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}
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}
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rb->close(bookmark_fd);
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}
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return false;
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}
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static void new_font(const char *path)
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{
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if(custom_font != FONT_UI)
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rb->font_unload(custom_font);
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custom_font = rb->font_load(path);
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if(custom_font < 0)
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custom_font = FONT_UI;
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}
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static void save_font(const char *path)
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{
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int font_fd = rb->open(CONFIG_FILE, O_WRONLY | O_TRUNC | O_CREAT, 0666);
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rb->write(font_fd, path, rb->strlen(path));
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rb->close(font_fd);
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}
|
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|
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static char font_buf[MAX_PATH + 1];
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|
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static void load_font(void)
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{
|
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int font_fd = rb->open(CONFIG_FILE, O_RDONLY);
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if(font_fd < 0)
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return;
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int len = rb->read(font_fd, font_buf, MAX_PATH);
|
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font_buf[len] = '\0';
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rb->close(font_fd);
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new_font(font_buf);
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}
|
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|
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static void font_menu(void)
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{
|
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/* taken from text_viewer */
|
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struct browse_context browse;
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char font[MAX_PATH], name[MAX_FILENAME+10];
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|
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rb->snprintf(name, sizeof(name), "%s.fnt", rb->global_settings->font_file);
|
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rb->browse_context_init(&browse, SHOW_FONT,
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BROWSE_SELECTONLY|BROWSE_NO_CONTEXT_MENU,
|
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"Font", Icon_Menu_setting, FONT_DIR, name);
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|
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browse.buf = font;
|
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browse.bufsize = sizeof(font);
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|
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rb->rockbox_browse(&browse);
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|
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if (browse.flags & BROWSE_SELECTED)
|
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{
|
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new_font(font);
|
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save_font(font);
|
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}
|
|
}
|
|
|
|
static bool confirm_restart(void)
|
|
{
|
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const struct text_message prompt = { (const char*[]) {"Are you sure?", "This will erase your current position."}, 2};
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enum yesno_res response = rb->gui_syncyesno_run(&prompt, NULL, NULL);
|
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if(response == YESNO_NO)
|
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return false;
|
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else
|
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return true;
|
|
}
|
|
|
|
static int config_menu(void)
|
|
{
|
|
MENUITEM_STRINGLIST(menu, "Speedread Menu", NULL,
|
|
"Resume Reading",
|
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"Restart from Beginning",
|
|
"Change Font",
|
|
"Quit");
|
|
int rc = 0;
|
|
int sel = 0;
|
|
while(!rc)
|
|
{
|
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switch(rb->do_menu(&menu, &sel, NULL, false))
|
|
{
|
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case 0:
|
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rc = 1;
|
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break;
|
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case 1:
|
|
if(fd >= 0 && confirm_restart())
|
|
{
|
|
rb->lseek(fd, begin_offs, SEEK_SET);
|
|
line_len = -1;
|
|
get_next_word();
|
|
rc = 1;
|
|
}
|
|
break;
|
|
case 2:
|
|
font_menu();
|
|
break;
|
|
case 3:
|
|
rc = 2;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return rc - 1;
|
|
}
|
|
|
|
enum { SKIP = -1, FINISH = -2 };
|
|
|
|
static int poll_input(int *wpm, long *clear, const char *fname, off_t file_size)
|
|
{
|
|
switch(get_useraction())
|
|
{
|
|
case FASTER:
|
|
if(*wpm + WPM_INCREMENT <= MAX_WPM)
|
|
*wpm += WPM_INCREMENT;
|
|
rb->splashf(0, "%d wpm", *wpm);
|
|
*clear = *rb->current_tick + HZ;
|
|
break;
|
|
case SLOWER:
|
|
if(*wpm - WPM_INCREMENT >= MIN_WPM)
|
|
*wpm -= WPM_INCREMENT;
|
|
rb->splashf(0, "%d wpm", *wpm);
|
|
*clear = *rb->current_tick + HZ;
|
|
break;
|
|
case FFWD:
|
|
if(fd >= 0)
|
|
{
|
|
off_t base_offs = rb->lseek(fd, 0, SEEK_CUR);
|
|
off_t offs = 0;
|
|
|
|
do {
|
|
offs += SEEK_INTERVAL;
|
|
if(offs >= 1000 * SEEK_INTERVAL)
|
|
offs += 199 * SEEK_INTERVAL;
|
|
else if(offs >= 100 * SEEK_INTERVAL)
|
|
offs += 99 * SEEK_INTERVAL;
|
|
else if(offs >= 10 * SEEK_INTERVAL)
|
|
offs += 9 * SEEK_INTERVAL;
|
|
rb->splashf(0, "%ld/%ld bytes", offs + base_offs, file_size);
|
|
rb->sleep(HZ/20);
|
|
} while(get_useraction() == FFWD && offs + base_offs < file_size && offs + base_offs >= 0);
|
|
|
|
*clear = *rb->current_tick + HZ;
|
|
|
|
rb->lseek(fd, offs, SEEK_CUR);
|
|
|
|
/* discard the next word (or more likely, portion of a word) */
|
|
line_len = -1;
|
|
get_next_word();
|
|
|
|
return SKIP;
|
|
}
|
|
break;
|
|
case BACK:
|
|
if(fd >= 0)
|
|
{
|
|
off_t base_offs = rb->lseek(fd, 0, SEEK_CUR);
|
|
off_t offs = 0;
|
|
|
|
do {
|
|
offs -= SEEK_INTERVAL;
|
|
if(offs <= -1000 * SEEK_INTERVAL)
|
|
offs -= 199 * SEEK_INTERVAL;
|
|
else if(offs <= -100 * SEEK_INTERVAL)
|
|
offs -= 99 * SEEK_INTERVAL;
|
|
else if(offs <= -10 * SEEK_INTERVAL)
|
|
offs -= 9 * SEEK_INTERVAL;
|
|
rb->splashf(0, "%ld/%ld bytes", offs + base_offs, file_size);
|
|
rb->sleep(HZ/20);
|
|
} while(get_useraction() == FFWD && offs + base_offs < file_size && offs + base_offs >= 0);
|
|
|
|
*clear = *rb->current_tick + HZ;
|
|
|
|
rb->lseek(fd, offs, SEEK_CUR);
|
|
|
|
/* discard the next word (or more likely, portion of a word) */
|
|
line_len = -1;
|
|
get_next_word();
|
|
|
|
return SKIP;
|
|
}
|
|
break;
|
|
case PAUSE:
|
|
case QUIT:
|
|
if(config_menu())
|
|
{
|
|
save_bookmark(fname, *wpm);
|
|
return FINISH;
|
|
}
|
|
else
|
|
{
|
|
init_drawing();
|
|
begin_anim();
|
|
}
|
|
break;
|
|
case NOTHING:
|
|
default:
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
enum plugin_status plugin_start(const void *param)
|
|
{
|
|
const char *fname = param;
|
|
|
|
off_t file_size = 0;
|
|
|
|
load_font();
|
|
|
|
bool loaded = false;
|
|
|
|
int wpm = DEF_WPM;
|
|
|
|
if(fname)
|
|
{
|
|
fd = rb->open_utf8(fname, O_RDONLY);
|
|
|
|
begin_offs = rb->lseek(fd, 0, SEEK_CUR); /* skip BOM */
|
|
file_size = rb->lseek(fd, 0, SEEK_END);
|
|
rb->lseek(fd, begin_offs, SEEK_SET);
|
|
|
|
loaded = load_bookmark(fname, &wpm);
|
|
}
|
|
|
|
init_drawing();
|
|
|
|
long clear = -1;
|
|
if(loaded)
|
|
{
|
|
rb->splash(0, "Loaded bookmark.");
|
|
clear = *rb->current_tick + HZ;
|
|
}
|
|
|
|
begin_anim();
|
|
|
|
/* main loop */
|
|
while(1)
|
|
{
|
|
switch(poll_input(&wpm, &clear, fname, file_size))
|
|
{
|
|
case SKIP:
|
|
continue;
|
|
case FINISH:
|
|
goto done;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
const char *word = get_next_word();
|
|
if(!word)
|
|
break;
|
|
bool want_full_update = false;
|
|
if(TIME_AFTER(*rb->current_tick, clear) && clear != -1)
|
|
{
|
|
clear = -1;
|
|
rb->lcd_clear_display();
|
|
want_full_update = true;
|
|
}
|
|
long interval = render_screen(word, wpm);
|
|
|
|
long frame_done = *rb->current_tick + interval;
|
|
|
|
if(want_full_update)
|
|
rb->lcd_update();
|
|
|
|
while(!TIME_AFTER(*rb->current_tick, frame_done))
|
|
{
|
|
switch(poll_input(&wpm, &clear, fname, file_size))
|
|
{
|
|
case SKIP:
|
|
goto next_word;
|
|
case FINISH:
|
|
goto done;
|
|
default:
|
|
break;
|
|
}
|
|
rb->yield();
|
|
}
|
|
next_word:
|
|
;
|
|
}
|
|
|
|
done:
|
|
rb->close(fd);
|
|
|
|
return PLUGIN_OK;
|
|
}
|