/*************************************************************************** * * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * * Copyright (C) 2002 Gilles Roux, 2003 Garrett Derner * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "plugin.h" #include PLUGIN_HEADER #define SETTINGS_FILE "/.rockbox/viewers/viewer.dat" #define WRAP_TRIM 44 /* Max number of spaces to trim (arbitrary) */ #define MAX_COLUMNS 64 /* Max displayable string len (over-estimate) */ #define MAX_WIDTH 910 /* Max line length in WIDE mode */ #define READ_PREV_ZONE 910 /* Arbitrary number less than SMALL_BLOCK_SIZE */ #define SMALL_BLOCK_SIZE 0x1000 /* 4k: Smallest file chunk we will read */ #define LARGE_BLOCK_SIZE 0x2000 /* 8k: Preferable size of file chunk to read */ #define BUFFER_SIZE 0x3000 /* 12k: Mem reserved for buffered file data */ #define TOP_SECTOR buffer #define MID_SECTOR (buffer + SMALL_BLOCK_SIZE) #define BOTTOM_SECTOR (buffer + 2*(SMALL_BLOCK_SIZE)) /* Out-Of-Bounds test for any pointer to data in the buffer */ #define BUFFER_OOB(p) ((p) < buffer || (p) >= buffer_end) /* Does the buffer contain the beginning of the file? */ #define BUFFER_BOF() (file_pos==0) /* Does the buffer contain the end of the file? */ #define BUFFER_EOF() (file_size-file_pos <= BUFFER_SIZE) /* Formula for the endpoint address outside of buffer data */ #define BUFFER_END() \ ((BUFFER_EOF()) ? (file_size-file_pos+buffer) : (buffer+BUFFER_SIZE)) /* Is the entire file being shown in one screen? */ #define ONE_SCREEN_FITS_ALL() \ (next_screen_ptr==NULL && screen_top_ptr==buffer && BUFFER_BOF()) /* Is a scrollbar called for on the current screen? */ #define NEED_SCROLLBAR() \ ((!(ONE_SCREEN_FITS_ALL())) && (scrollbar_mode[view_mode]==SB_ON)) /* variable button definitions */ /* Recorder keys */ #if CONFIG_KEYPAD == RECORDER_PAD #define VIEWER_QUIT BUTTON_OFF #define VIEWER_PAGE_UP BUTTON_UP #define VIEWER_PAGE_DOWN BUTTON_DOWN #define VIEWER_SCREEN_LEFT BUTTON_LEFT #define VIEWER_SCREEN_RIGHT BUTTON_RIGHT #define VIEWER_MODE_WRAP BUTTON_F1 #define VIEWER_MODE_LINE BUTTON_F2 #define VIEWER_MODE_WIDTH BUTTON_F3 #define VIEWER_MODE_PAGE (BUTTON_ON | BUTTON_F1) #define VIEWER_MODE_SCROLLBAR (BUTTON_ON | BUTTON_F3) #define VIEWER_LINE_UP (BUTTON_ON | BUTTON_UP) #define VIEWER_LINE_DOWN (BUTTON_ON | BUTTON_DOWN) #define VIEWER_COLUMN_LEFT (BUTTON_ON | BUTTON_LEFT) #define VIEWER_COLUMN_RIGHT (BUTTON_ON | BUTTON_RIGHT) /* Ondio keys */ #elif CONFIG_KEYPAD == ONDIO_PAD #define VIEWER_QUIT BUTTON_OFF #define VIEWER_PAGE_UP BUTTON_UP #define VIEWER_PAGE_DOWN BUTTON_DOWN #define VIEWER_SCREEN_LEFT BUTTON_LEFT #define VIEWER_SCREEN_RIGHT BUTTON_RIGHT #define VIEWER_MODE_WRAP (BUTTON_MENU | BUTTON_LEFT) #define VIEWER_MODE_LINE (BUTTON_MENU | BUTTON_UP) #define VIEWER_MODE_WIDTH (BUTTON_MENU | BUTTON_RIGHT) #define VIEWER_MODE_PAGE (BUTTON_MENU | BUTTON_DOWN) #define VIEWER_MODE_SCROLLBAR (BUTTON_MENU | BUTTON_OFF) /* Player keys */ #elif CONFIG_KEYPAD == PLAYER_PAD #define VIEWER_QUIT BUTTON_STOP #define VIEWER_PAGE_UP BUTTON_LEFT #define VIEWER_PAGE_DOWN BUTTON_RIGHT #define VIEWER_SCREEN_LEFT (BUTTON_MENU | BUTTON_LEFT) #define VIEWER_SCREEN_RIGHT (BUTTON_MENU | BUTTON_RIGHT) #define VIEWER_MODE_WRAP (BUTTON_ON | BUTTON_LEFT) #define VIEWER_MODE_LINE (BUTTON_ON | BUTTON_MENU | BUTTON_RIGHT) #define VIEWER_MODE_WIDTH (BUTTON_ON | BUTTON_RIGHT) /* iRiver H1x0 && H3x0 keys */ #elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \ (CONFIG_KEYPAD == IRIVER_H300_PAD) #define VIEWER_QUIT BUTTON_OFF #define VIEWER_PAGE_UP BUTTON_UP #define VIEWER_PAGE_DOWN BUTTON_DOWN #define VIEWER_SCREEN_LEFT BUTTON_LEFT #define VIEWER_SCREEN_RIGHT BUTTON_RIGHT #define VIEWER_MODE_WRAP BUTTON_REC #define VIEWER_MODE_LINE BUTTON_MODE #define VIEWER_MODE_WIDTH BUTTON_SELECT #define VIEWER_MODE_PAGE (BUTTON_ON | BUTTON_MODE) #define VIEWER_MODE_SCROLLBAR (BUTTON_ON | BUTTON_REC) #define VIEWER_LINE_UP (BUTTON_ON | BUTTON_UP) #define VIEWER_LINE_DOWN (BUTTON_ON | BUTTON_DOWN) #define VIEWER_COLUMN_LEFT (BUTTON_ON | BUTTON_LEFT) #define VIEWER_COLUMN_RIGHT (BUTTON_ON | BUTTON_RIGHT) /* iPods with the 4G pad */ #elif (CONFIG_KEYPAD == IPOD_4G_PAD) #define VIEWER_QUIT BUTTON_MENU #define VIEWER_PAGE_UP BUTTON_SCROLL_BACK #define VIEWER_PAGE_DOWN BUTTON_SCROLL_FWD #define VIEWER_SCREEN_LEFT BUTTON_LEFT #define VIEWER_SCREEN_RIGHT BUTTON_RIGHT #define VIEWER_MODE_WRAP (BUTTON_SELECT | BUTTON_LEFT) #define VIEWER_MODE_LINE (BUTTON_SELECT | BUTTON_PLAY) #define VIEWER_MODE_WIDTH (BUTTON_SELECT | BUTTON_RIGHT) #define VIEWER_MODE_PAGE (BUTTON_SELECT | BUTTON_LEFT | BUTTON_MENU) #define VIEWER_MODE_SCROLLBAR (BUTTON_SELECT | BUTTON_LEFT | BUTTON_RIGHT) /* iFP7xx keys */ #elif CONFIG_KEYPAD == IRIVER_IFP7XX_PAD #define VIEWER_QUIT BUTTON_PLAY #define VIEWER_PAGE_UP BUTTON_UP #define VIEWER_PAGE_DOWN BUTTON_DOWN #define VIEWER_SCREEN_LEFT BUTTON_LEFT #define VIEWER_SCREEN_RIGHT BUTTON_RIGHT #define VIEWER_MODE_WRAP (BUTTON_EQ | BUTTON_REL) #define VIEWER_MODE_LINE (BUTTON_EQ | BUTTON_REPEAT) #define VIEWER_MODE_WIDTH BUTTON_MODE /* iAudio X5 keys */ #elif CONFIG_KEYPAD == IAUDIO_X5_PAD #define VIEWER_QUIT BUTTON_POWER #define VIEWER_PAGE_UP BUTTON_UP #define VIEWER_PAGE_DOWN BUTTON_DOWN #define VIEWER_SCREEN_LEFT BUTTON_LEFT #define VIEWER_SCREEN_RIGHT BUTTON_RIGHT #define VIEWER_MODE_WRAP (BUTTON_PLAY | BUTTON_REL) #define VIEWER_MODE_LINE (BUTTON_PLAY | BUTTON_REPEAT) #define VIEWER_MODE_WIDTH BUTTON_MENU #endif enum { WRAP=0, CHOP, WORD_MODES } word_mode = 0; static unsigned char *word_mode_str[] = {"wrap", "chop", "words"}; enum { NORMAL=0, JOIN, #ifdef HAVE_LCD_BITMAP REFLOW, /* Makes no sense for the player */ #endif EXPAND, LINE_MODES, #ifndef HAVE_LCD_BITMAP REFLOW /* Sorting it behind LINE_MODES effectively disables it. */ #endif } line_mode = 0; static unsigned char *line_mode_str[] = { [NORMAL] = "normal", [JOIN] = "join", [REFLOW] = "reflow", [EXPAND] = "expand", [LINE_MODES] = "lines" }; enum { NARROW=0, WIDE, VIEW_MODES } view_mode = 0; static unsigned char *view_mode_str[] = {"narrow", "wide", "view"}; #ifdef HAVE_LCD_BITMAP enum { SB_OFF=0, SB_ON, SCROLLBAR_MODES } scrollbar_mode[VIEW_MODES] = {SB_OFF, SB_ON}; #ifdef VIEWER_MODE_SCROLLBAR static unsigned char *scrollbar_mode_str[] = {"off", "on", "scrollbar"}; #endif static bool need_scrollbar; enum { NO_OVERLAP=0, OVERLAP, PAGE_MODES } page_mode = 0; #ifdef VIEWER_MODE_PAGE static unsigned char *page_mode_str[] = {"don't overlap", "overlap", "pages"}; #endif #endif static unsigned char buffer[BUFFER_SIZE + 1]; static unsigned char line_break[] = {0,0x20,'-',9,0xB,0xC}; static int display_columns; /* number of (pixel) columns on the display */ static int display_lines; /* number of lines on the display */ static int draw_columns; /* number of (pixel) columns available for text */ static int par_indent_spaces; /* number of spaces to indent first paragraph */ static int fd; static char *file_name; static long file_size; static bool mac_text; static long file_pos; /* Position of the top of the buffer in the file */ static unsigned char *buffer_end; /*Set to BUFFER_END() when file_pos changes*/ static int max_line_len; static unsigned char *screen_top_ptr; static unsigned char *next_screen_ptr; static unsigned char *next_screen_to_draw_ptr; static unsigned char *next_line_ptr; static struct plugin_api* rb; static unsigned char glyph_width[256]; #define ADVANCE_COUNTERS(c) do { width += glyph_width[c]; k++; } while(0) #define LINE_IS_FULL ((k>MAX_COLUMNS-1) || (width > draw_columns)) static unsigned char* crop_at_width(const unsigned char* p) { int k,width; k=width=0; while (!LINE_IS_FULL) ADVANCE_COUNTERS(p[k]); return (unsigned char*) p+k-1; } static unsigned char* find_first_feed(const unsigned char* p, int size) { int i; for (i=0; i < size; i++) if (p[i] == 0) return (unsigned char*) p+i; return NULL; } static unsigned char* find_last_feed(const unsigned char* p, int size) { int i; for (i=size-1; i>=0; i--) if (p[i] == 0) return (unsigned char*) p+i; return NULL; } static unsigned char* find_last_space(const unsigned char* p, int size) { int i, j, k; k = (line_mode==JOIN) || (line_mode==REFLOW) ? 0:1; for (i=size-1; i>=0; i--) for (j=k; j < (int) sizeof(line_break); j++) if (p[i] == line_break[j]) return (unsigned char*) p+i; return NULL; } static unsigned char* find_next_line(const unsigned char* cur_line, bool *is_short) { const unsigned char *next_line = NULL; int size, i, j, k, width, search_len, spaces, newlines; bool first_chars; unsigned char c; if (is_short != NULL) *is_short = true; if BUFFER_OOB(cur_line) return NULL; if (view_mode == WIDE) { search_len = MAX_WIDTH; } else { /* view_mode == NARROW */ search_len = crop_at_width(cur_line) - cur_line; } size = BUFFER_OOB(cur_line+search_len) ? buffer_end-cur_line : search_len; if ((line_mode == JOIN) || (line_mode == REFLOW)) { /* Need to scan ahead and possibly increase search_len and size, or possibly set next_line at second hard return in a row. */ next_line = NULL; first_chars=true; for (j=k=width=spaces=newlines=0; ; j++) { if (BUFFER_OOB(cur_line+j)) return NULL; if (LINE_IS_FULL) { size = search_len = j; break; } c = cur_line[j]; switch (c) { case ' ': if (line_mode == REFLOW) { if (newlines > 0) { size = j; next_line = cur_line + size; return (unsigned char*) next_line; } if (j==0) /* i=1 is intentional */ for (i=0; i 0) { size = j; next_line = cur_line + size - spaces; if (next_line != cur_line) return (unsigned char*) next_line; break; } newlines++; size += spaces -1; if (BUFFER_OOB(cur_line+size) || size > 2*search_len) return NULL; search_len = size; spaces = first_chars? 0:1; break; default: if (line_mode==JOIN || newlines>0) { while (spaces) { spaces--; ADVANCE_COUNTERS(' '); if (LINE_IS_FULL) { size = search_len = j; break; } } newlines=0; } else if (spaces) { /* REFLOW, multiple spaces between words: count only * one. If more are needed, they will be added * while drawing. */ search_len = size; spaces=0; ADVANCE_COUNTERS(' '); if (LINE_IS_FULL) { size = search_len = j; break; } } first_chars = false; ADVANCE_COUNTERS(c); break; } } } else { /* find first hard return */ next_line = find_first_feed(cur_line, size); } if (next_line == NULL) if (size == search_len) { if (word_mode == WRAP) /* Find last space */ next_line = find_last_space(cur_line, size); if (next_line == NULL) next_line = crop_at_width(cur_line); else if (word_mode == WRAP) for (i=0; i READ_PREV_ZONE) prev_line = p = buffer; /* (else return NULL and read previous block) */ /* Wrap downwards until too far, then use the one before. */ while (p < cur_line && p != NULL) { prev_line = p; p = find_next_line(prev_line, NULL); } if (BUFFER_OOB(prev_line)) return NULL; return (unsigned char*) prev_line; } static void fill_buffer(long pos, unsigned char* buf, unsigned size) { /* Read from file and preprocess the data */ /* To minimize disk access, always read on sector boundaries */ unsigned numread, i; bool found_CR = false; rb->lseek(fd, pos, SEEK_SET); numread = rb->read(fd, buf, size); rb->button_clear_queue(); /* clear button queue */ for(i = 0; i < numread; i++) { switch(buf[i]) { case '\r': if (mac_text) { buf[i] = 0; } else { buf[i] = ' '; found_CR = true; } break; case '\n': buf[i] = 0; found_CR = false; break; case 0: /* No break between case 0 and default, intentionally */ buf[i] = ' '; default: if (found_CR) { buf[i - 1] = 0; found_CR = false; mac_text = true; } break; } } } static int read_and_synch(int direction) { /* Read next (or prev) block, and reposition global pointers. */ /* direction: 1 for down (i.e., further into file), -1 for up */ int move_size, move_vector, offset; unsigned char *fill_buf; if (direction == -1) /* up */ { move_size = SMALL_BLOCK_SIZE; offset = 0; fill_buf = TOP_SECTOR; rb->memcpy(BOTTOM_SECTOR, MID_SECTOR, SMALL_BLOCK_SIZE); rb->memcpy(MID_SECTOR, TOP_SECTOR, SMALL_BLOCK_SIZE); } else /* down */ { if (view_mode == WIDE) { /* WIDE mode needs more buffer so we have to read smaller blocks */ move_size = SMALL_BLOCK_SIZE; offset = LARGE_BLOCK_SIZE; fill_buf = BOTTOM_SECTOR; rb->memcpy(TOP_SECTOR, MID_SECTOR, SMALL_BLOCK_SIZE); rb->memcpy(MID_SECTOR, BOTTOM_SECTOR, SMALL_BLOCK_SIZE); } else { move_size = LARGE_BLOCK_SIZE; offset = SMALL_BLOCK_SIZE; fill_buf = MID_SECTOR; rb->memcpy(TOP_SECTOR, BOTTOM_SECTOR, SMALL_BLOCK_SIZE); } } move_vector = direction * move_size; screen_top_ptr -= move_vector; file_pos += move_vector; buffer_end = BUFFER_END(); /* Update whenever file_pos changes */ fill_buffer(file_pos + offset, fill_buf, move_size); return move_vector; } static void viewer_scroll_up(void) { unsigned char *p; p = find_prev_line(screen_top_ptr); if (p == NULL && !BUFFER_BOF()) { read_and_synch(-1); p = find_prev_line(screen_top_ptr); } if (p != NULL) screen_top_ptr = p; } #ifdef HAVE_LCD_BITMAP static void viewer_scrollbar(void) { int w, h, items, min_shown, max_shown; rb->lcd_getstringsize("o", &w, &h); items = (int) file_size; /* (SH1 int is same as long) */ min_shown = (int) file_pos + (screen_top_ptr - buffer); if (next_screen_ptr == NULL) max_shown = items; else max_shown = min_shown + (next_screen_ptr - screen_top_ptr); rb->scrollbar(0, 0, w-1, LCD_HEIGHT, items, min_shown, max_shown, VERTICAL); } #endif static void viewer_draw(int col) { int i, j, k, line_len, resynch_move, spaces, left_col=0; int width, extra_spaces, indent_spaces, spaces_per_word; bool multiple_spacing, line_is_short; unsigned char *line_begin; unsigned char *line_end; unsigned char c; unsigned char scratch_buffer[MAX_COLUMNS + 1]; /* If col==-1 do all calculations but don't display */ if (col != -1) { #ifdef HAVE_LCD_BITMAP left_col = need_scrollbar? 1:0; #else left_col = 0; #endif rb->lcd_clear_display(); } max_line_len = 0; line_begin = line_end = screen_top_ptr; for (i = 0; i < display_lines; i++) { if (BUFFER_OOB(line_end)) break; /* Happens after display last line at BUFFER_EOF() */ line_begin = line_end; line_end = find_next_line(line_begin, &line_is_short); if (line_end == NULL) { if (BUFFER_EOF()) { if (i < display_lines - 1 && !BUFFER_BOF()) { if (col != -1) rb->lcd_clear_display(); for (; i < display_lines - 1; i++) viewer_scroll_up(); line_begin = line_end = screen_top_ptr; i = -1; continue; } else { line_end = buffer_end; } } else { resynch_move = read_and_synch(1); /* Read block & move ptrs */ line_begin -= resynch_move; if (i > 0) next_line_ptr -= resynch_move; line_end = find_next_line(line_begin, NULL); if (line_end == NULL) /* Should not really happen */ break; } } line_len = line_end - line_begin; if (line_mode == JOIN) { if (line_begin[0] == 0) { line_begin++; if (word_mode == CHOP) line_end++; else line_len--; } for (j=k=spaces=0; j < line_len; j++) { if (k == MAX_COLUMNS) break; c = line_begin[j]; switch (c) { case ' ': spaces++; break; case 0: spaces = 0; scratch_buffer[k++] = ' '; break; default: while (spaces) { spaces--; scratch_buffer[k++] = ' '; if (k == MAX_COLUMNS - 1) break; } scratch_buffer[k++] = c; break; } } if (col != -1) if (k > col) { scratch_buffer[k] = 0; rb->lcd_puts(left_col, i, scratch_buffer + col); } } else if (line_mode == REFLOW) { if (line_begin[0] == 0) { line_begin++; if (word_mode == CHOP) line_end++; else line_len--; } indent_spaces = 0; if (!line_is_short) { multiple_spacing = false; for (j=width=spaces=0; j < line_len; j++) { c = line_begin[j]; switch (c) { case ' ': case 0: if ((j==0) && (word_mode==WRAP)) /* special case: indent the paragraph, * don't count spaces */ indent_spaces = par_indent_spaces; else if (!multiple_spacing) spaces++; multiple_spacing = true; break; default: multiple_spacing = false; width += glyph_width[c]; k++; break; } } if (multiple_spacing) spaces--; if (spaces) { /* total number of spaces to insert between words */ extra_spaces = (draw_columns-width) / glyph_width[' '] - indent_spaces; /* number of spaces between each word*/ spaces_per_word = extra_spaces / spaces; /* number of words with n+1 spaces (to fill up) */ extra_spaces = extra_spaces % spaces; if (spaces_per_word > 2) { /* too much spacing is awful */ spaces_per_word = 3; extra_spaces = 0; } } else { /* this doesn't matter much... no spaces anyway */ spaces_per_word = extra_spaces = 0; } } else { /* end of a paragraph: don't fill line */ spaces_per_word = 1; extra_spaces = 0; } multiple_spacing = false; for (j=k=spaces=0; j < line_len; j++) { if (k == MAX_COLUMNS) break; c = line_begin[j]; switch (c) { case ' ': case 0: if (j==0 && word_mode==WRAP) { /* indent paragraph */ for (j=0; j col) { scratch_buffer[k] = 0; rb->lcd_puts(left_col, i, scratch_buffer + col); } } else { /* line_mode != JOIN && line_mode != REFLOW */ if (col != -1) if (line_len > col) { c = line_end[0]; line_end[0] = 0; rb->lcd_puts(left_col, i, line_begin + col); line_end[0] = c; } } if (line_len > max_line_len) max_line_len = line_len; if (i == 0) next_line_ptr = line_end; } next_screen_ptr = line_end; if (BUFFER_OOB(next_screen_ptr)) next_screen_ptr = NULL; #ifdef HAVE_LCD_BITMAP next_screen_to_draw_ptr = page_mode==OVERLAP? line_begin: next_screen_ptr; if (need_scrollbar) viewer_scrollbar(); if (col != -1) rb->lcd_update(); #else next_screen_to_draw_ptr = next_screen_ptr; #endif } static void viewer_top(void) { /* Read top of file into buffer and point screen pointer to top */ file_pos = 0; buffer_end = BUFFER_END(); /* Update whenever file_pos changes */ screen_top_ptr = buffer; fill_buffer(0, buffer, BUFFER_SIZE); } static void viewer_bottom(void) { /* Read bottom of file into buffer and point screen pointer to bottom */ long last_sectors; if (file_size > BUFFER_SIZE) { /* Find last buffer in file, round up to next sector boundary */ last_sectors = file_size - BUFFER_SIZE + SMALL_BLOCK_SIZE; last_sectors /= SMALL_BLOCK_SIZE; last_sectors *= SMALL_BLOCK_SIZE; } else { last_sectors = 0; } file_pos = last_sectors; buffer_end = BUFFER_END(); /* Update whenever file_pos changes */ screen_top_ptr = buffer_end-1; fill_buffer(last_sectors, buffer, BUFFER_SIZE); } #ifdef HAVE_LCD_BITMAP static void init_need_scrollbar(void) { /* Call viewer_draw in quiet mode to initialize next_screen_ptr, and thus ONE_SCREEN_FITS_ALL(), and thus NEED_SCROLLBAR() */ viewer_draw(-1); need_scrollbar = NEED_SCROLLBAR(); draw_columns = need_scrollbar? display_columns-glyph_width['o'] : display_columns; par_indent_spaces = draw_columns/(5*glyph_width[' ']); } #else #define init_need_scrollbar() #endif static bool viewer_init(void) { #ifdef HAVE_LCD_BITMAP int idx, ch; struct font *pf; pf = rb->font_get(FONT_UI); if (pf->width != NULL) { /* variable pitch font -- fill structure from font width data */ ch = pf->defaultchar - pf->firstchar; rb->memset(glyph_width, pf->width[ch], 256); idx = pf->firstchar; rb->memcpy(&glyph_width[idx], pf->width, pf->size); idx += pf->size; rb->memset(&glyph_width[idx], pf->width[ch], 256-idx); } else /* fixed pitch font -- same width for all glyphs */ rb->memset(glyph_width, pf->maxwidth, 256); display_lines = LCD_HEIGHT / pf->height; display_columns = LCD_WIDTH; #else /* REAL fixed pitch :) all chars use up 1 cell */ display_lines = 2; draw_columns = display_columns = 11; par_indent_spaces = 2; rb->memset(glyph_width, 1, 256); #endif /********************* * (Could re-initialize settings here, if you * wanted viewer to start the same way every time) word_mode = WRAP; line_mode = NORMAL; view_mode = NARROW; #ifdef HAVE_LCD_BITMAP page_mode = NO_OVERLAP; scrollbar_mode[NARROW] = SB_OFF; scrollbar_mode[WIDE] = SB_ON; #endif **********************/ fd = rb->open(file_name, O_RDONLY); if (fd==-1) return false; file_size = rb->filesize(fd); if (file_size==-1) return false; /* Init mac_text value used in processing buffer */ mac_text = false; /* Read top of file into buffer; init file_pos, buffer_end, screen_top_ptr */ viewer_top(); /* Init need_scrollbar value */ init_need_scrollbar(); return true; } /* in the viewer settings file, the line format is: * - file name (variable length) * - settings (fixed length strings appended, EOL included) */ typedef struct { char word_mode[2], line_mode[2], view_mode[2]; char file_pos[11], screen_top_ptr[11]; #ifdef HAVE_LCD_BITMAP char scrollbar_mode[VIEW_MODES][2], page_mode[2]; #endif char EOL; } viewer_settings_string; static void viewer_load_settings(void) { int settings_fd, file_name_len, req_line_len, line_len; char line[1024]; settings_fd=rb->open(SETTINGS_FILE, O_RDONLY); if (settings_fd < 0) return; file_name_len = rb->strlen(file_name); req_line_len = file_name_len + sizeof(viewer_settings_string); while ((line_len = rb->read_line(settings_fd, line, sizeof(line))) > 0) { if ((line_len == req_line_len) && (rb->strncasecmp(line, file_name, file_name_len) == 0)) { /* found a match, load stored values */ viewer_settings_string *prefs = (void*) &line[file_name_len]; #ifdef HAVE_LCD_BITMAP /* view mode will be initialized later anyways */ for (view_mode=0; view_modeatoi(prefs->scrollbar_mode[view_mode]); page_mode = rb->atoi(prefs->page_mode); #endif word_mode = rb->atoi(prefs->word_mode); line_mode = rb->atoi(prefs->line_mode); view_mode = rb->atoi(prefs->view_mode); init_need_scrollbar(); /* the following settings are safety checked * (file may have changed on disk) */ file_pos = rb->atoi(prefs->file_pos); /* should be atol() */ if (file_pos > file_size) { file_pos = 0; break; } buffer_end = BUFFER_END(); /* Update whenever file_pos changes */ screen_top_ptr = buffer + rb->atoi(prefs->screen_top_ptr); if (BUFFER_OOB(screen_top_ptr)) { screen_top_ptr = buffer; break; } } } rb->close(settings_fd); fill_buffer(file_pos, buffer, BUFFER_SIZE); } static void viewer_save_settings(void) { int settings_fd, file_name_len, req_line_len, line_len; char line[1024]; viewer_settings_string prefs; settings_fd=rb->open(SETTINGS_FILE, O_RDWR | O_CREAT); DEBUGF("SETTINGS_FILE: %d\n", settings_fd); if (settings_fd < 0) return; file_name_len = rb->strlen(file_name); req_line_len = file_name_len + sizeof(viewer_settings_string); while ((line_len = rb->read_line(settings_fd, line, sizeof(line))) > 0) { if ((line_len == req_line_len) && (rb->strncasecmp(line, file_name, file_name_len) == 0)) { /* found a match, reposition file pointer to overwrite this line */ rb->lseek(settings_fd, -line_len, SEEK_CUR); break; } } /* fill structure in order to prevent overwriting with 0s (snprintf * intentionally overflows so that no terminating NULLs are written * to disk). */ rb->snprintf(prefs.word_mode, 3, "%2d", word_mode); rb->snprintf(prefs.line_mode, 3, "%2d", line_mode); rb->snprintf(prefs.view_mode, 3, "%2d", view_mode); rb->snprintf(prefs.file_pos, 12, "%11d", file_pos); rb->snprintf(prefs.screen_top_ptr, 12, "%11d", screen_top_ptr-buffer); #ifdef HAVE_LCD_BITMAP /* view_mode is not needed anymore */ for (view_mode=0; view_modesnprintf(prefs.scrollbar_mode[view_mode], 3, "%2d", scrollbar_mode[view_mode]); rb->snprintf(prefs.page_mode, 3, "%2d", page_mode); #endif prefs.EOL = '\n'; rb->write(settings_fd, file_name, file_name_len); rb->write(settings_fd, &prefs, sizeof(prefs)); rb->close(settings_fd); } static void viewer_exit(void *parameter) { (void)parameter; viewer_save_settings(); rb->close(fd); } static int col_limit(int col) { if (col < 0) col = 0; else if (col > max_line_len - 2) col = max_line_len - 2; return col; } enum plugin_status plugin_start(struct plugin_api* api, void* file) { bool exit=false; int button; int col = 0; int i; int ok; rb = api; if (!file) return PLUGIN_ERROR; file_name = file; ok = viewer_init(); if (!ok) { rb->splash(HZ, false, "Error"); viewer_exit(NULL); return PLUGIN_OK; } viewer_load_settings(); viewer_draw(col); while (!exit) { button = rb->button_get(true); switch (button) { case VIEWER_QUIT: viewer_exit(NULL); exit = true; break; case VIEWER_MODE_WRAP: /* Word-wrap mode: WRAP or CHOP */ if (++word_mode == WORD_MODES) word_mode = 0; init_need_scrollbar(); viewer_draw(col); rb->splash(HZ, true, "%s %s", word_mode_str[word_mode], word_mode_str[WORD_MODES]); viewer_draw(col); break; case VIEWER_MODE_LINE: /* Line-paragraph mode: NORMAL, JOIN, REFLOW or EXPAND */ if (++line_mode == LINE_MODES) line_mode = 0; if (view_mode == WIDE) { if (line_mode == JOIN) if (++line_mode == LINE_MODES) line_mode = 0; if (line_mode == REFLOW) if (++line_mode == LINE_MODES) line_mode = 0; } init_need_scrollbar(); viewer_draw(col); rb->splash(HZ, true, "%s %s", line_mode_str[line_mode], line_mode_str[LINE_MODES]); viewer_draw(col); break; case VIEWER_MODE_WIDTH: /* View-width mode: NARROW or WIDE */ if ((line_mode == JOIN) || (line_mode == REFLOW)) rb->splash(HZ, true, "(no %s %s)", view_mode_str[WIDE], line_mode_str[line_mode]); else if (++view_mode == VIEW_MODES) view_mode = 0; col = 0; /***** Could do this after change of word-wrap mode * and after change of view-width mode, to normalize * view: if (screen_top_ptr > buffer + BUFFER_SIZE/2) { screen_top_ptr = find_prev_line(screen_top_ptr); screen_top_ptr = find_next_line(screen_top_ptr); } else { screen_top_ptr = find_next_line(screen_top_ptr); screen_top_ptr = find_prev_line(screen_top_ptr); } ***********/ init_need_scrollbar(); viewer_draw(col); rb->splash(HZ, true, "%s %s", view_mode_str[view_mode], view_mode_str[VIEW_MODES]); viewer_draw(col); break; case VIEWER_PAGE_UP: case VIEWER_PAGE_UP | BUTTON_REPEAT: /* Page up */ #ifdef HAVE_LCD_BITMAP for (i = page_mode==OVERLAP? 1:0; i < display_lines; i++) #else for (i = 0; i < display_lines; i++) #endif viewer_scroll_up(); viewer_draw(col); break; case VIEWER_PAGE_DOWN: case VIEWER_PAGE_DOWN | BUTTON_REPEAT: /* Page down */ if (next_screen_ptr != NULL) screen_top_ptr = next_screen_to_draw_ptr; viewer_draw(col); break; case VIEWER_SCREEN_LEFT: case VIEWER_SCREEN_LEFT | BUTTON_REPEAT: if (view_mode == WIDE) { /* Screen left */ col -= draw_columns/glyph_width['o']; col = col_limit(col); } else { /* view_mode == NARROW */ /* Top of file */ viewer_top(); } viewer_draw(col); break; case VIEWER_SCREEN_RIGHT: case VIEWER_SCREEN_RIGHT | BUTTON_REPEAT: if (view_mode == WIDE) { /* Screen right */ col += draw_columns/glyph_width['o']; col = col_limit(col); } else { /* view_mode == NARROW */ /* Bottom of file */ viewer_bottom(); } viewer_draw(col); break; #ifdef VIEWER_MODE_PAGE case VIEWER_MODE_PAGE: /* Page-overlap mode */ if (++page_mode == PAGE_MODES) page_mode = 0; rb->splash(HZ, true, "%s %s", page_mode_str[page_mode], page_mode_str[PAGE_MODES]); viewer_draw(col); break; #endif #ifdef VIEWER_MODE_SCROLLBAR case VIEWER_MODE_SCROLLBAR: /* Show-scrollbar mode for current view-width mode */ if (!(ONE_SCREEN_FITS_ALL())) { if (++scrollbar_mode[view_mode] == SCROLLBAR_MODES) scrollbar_mode[view_mode] = 0; init_need_scrollbar(); viewer_draw(col); rb->splash(HZ, true, "%s %s (%s %s)", scrollbar_mode_str[SCROLLBAR_MODES], scrollbar_mode_str[scrollbar_mode[view_mode]], view_mode_str[view_mode], view_mode_str[VIEW_MODES]); } viewer_draw(col); break; #endif #ifdef VIEWER_LINE_UP case VIEWER_LINE_UP: case VIEWER_LINE_UP | BUTTON_REPEAT: /* Scroll up one line */ viewer_scroll_up(); viewer_draw(col); break; case VIEWER_LINE_DOWN: case VIEWER_LINE_DOWN | BUTTON_REPEAT: /* Scroll down one line */ if (next_screen_ptr != NULL) screen_top_ptr = next_line_ptr; viewer_draw(col); break; #endif #ifdef VIEWER_COLUMN_LEFT case VIEWER_COLUMN_LEFT: case VIEWER_COLUMN_LEFT | BUTTON_REPEAT: /* Scroll left one column */ col--; col = col_limit(col); viewer_draw(col); break; case VIEWER_COLUMN_RIGHT: case VIEWER_COLUMN_RIGHT | BUTTON_REPEAT: /* Scroll right one column */ col++; col = col_limit(col); viewer_draw(col); break; #endif default: if (rb->default_event_handler_ex(button, viewer_exit, NULL) == SYS_USB_CONNECTED) return PLUGIN_USB_CONNECTED; break; } } return PLUGIN_OK; }