new text viewer

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25644 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 464 insertions, 0 deletions

diff --git a/apps/plugins/textviewer/tv_settings.c b/apps/plugins/textviewer/tv_settings.c
new file mode 100644
index 0000000..463e6a4
--- /dev/null
+++ b/apps/plugins/textviewer/tv_settings.c
@@ -0,0 +1,464 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 Gilles Roux
+ *               2003 Garrett Derner
+ *               2010 Yoshihisa Uchida
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "plugin.h"
+#include <ctype.h>
+
+/* global settings file
+ * binary file, so dont use .cfg
+ *
+ * setting file format
+ *
+ * part                byte count
+ * --------------------------------
+ * 'TVGS'               4
+ * version              1
+ * word_mode            1
+ * line_mode            1
+ * view_mode            1
+ * encoding             1
+ * scrollbar_mode       1
+ * need_scrollbar       1
+ * page_mode            1
+ * page_number_mode     1
+ * title_mode           1
+ * scroll_mode          1
+ * autoscroll_speed     1
+ * font name            MAX_PATH
+ */
+#define GLOBAL_SETTINGS_FILE     VIEWERS_DIR "/viewer.dat"
+
+/* temporary file */
+#define GLOBAL_SETTINGS_TMP_FILE VIEWERS_DIR "/viewer_file.tmp"
+
+#define GLOBAL_SETTINGS_HEADER   "\x54\x56\x47\x53\x31" /* header="TVGS" version=1 */
+#define GLOBAL_SETTINGS_H_SIZE   5
+
+/* preferences and bookmarks at each file
+ * binary file, so dont use .cfg
+ *
+ * setting file format
+ *
+ * part                byte count
+ * --------------------------------
+ * 'TVS'                3
+ * version              1
+ * file count           2
+ * [1st file]
+ *   file path          MAX_PATH
+ *   next file pos      2
+ *   [preferences]
+ *     word_mode        1
+ *     line_mode        1
+ *     view_mode        1
+ *     encoding         1
+ *     scrollbar_mode   1
+ *     need_scrollbar   1
+ *     page_mode        1
+ *     header_mode      1
+ *     footer_mode      1
+ *     scroll_mode      1
+ *     autoscroll_speed 1
+ *     font name        MAX_PATH
+ *   bookmark count     1
+ *   [1st bookmark]
+ *     file_position    4
+ *     page             2
+ *     line             1
+ *     flag             1
+ *   [2nd bookmark]
+ *   ...
+ *   [last bookmark]
+ * [2nd file]
+ * ...
+ * [last file]
+ */
+#define SETTINGS_FILE        VIEWERS_DIR "/viewer_file.dat"
+
+/* temporary file */
+#define SETTINGS_TMP_FILE    VIEWERS_DIR "/viewer_file.tmp"
+
+#define SETTINGS_HEADER      "\x54\x56\x53\x32" /* header="TVS" version=2 */
+#define SETTINGS_H_SIZE      4
+
+#ifndef HAVE_LCD_BITMAP
+#define BOOKMARK_ICON       "\xee\x84\x81\x00"
+#endif
+
+#define PREFERENCES_SIZE    (11 + MAX_PATH)
+
+
+struct preferences prefs;
+struct preferences old_prefs;
+
+static int fd;
+static const char *file_name;
+static int cline = 1;
+static int cpage = 1;
+static int lpage = 0;
+
+static void viewer_default_preferences(void)
+{
+    prefs.word_mode = WRAP;
+    prefs.line_mode = NORMAL;
+    prefs.view_mode = NARROW;
+    prefs.scroll_mode = PAGE;
+    prefs.page_mode = NO_OVERLAP;
+    prefs.scrollbar_mode = SB_OFF;
+    rb->memset(prefs.font, 0, MAX_PATH);
+#ifdef HAVE_LCD_BITMAP
+    prefs.header_mode = HD_BOTH;
+    prefs.footer_mode = FT_BOTH;
+    rb->snprintf(prefs.font, MAX_PATH, "%s", rb->global_settings->font_file);
+#else
+    prefs.header_mode = HD_NONE;
+    prefs.footer_mode = FT_NONE;
+#endif
+    prefs.autoscroll_speed = 1;
+    /* Set codepage to system default */
+    prefs.encoding = rb->global_settings->default_codepage;
+}
+
+static bool viewer_read_preferences(int pfd)
+{
+    unsigned char buf[PREFERENCES_SIZE];
+    unsigned char *p = buf;
+
+    if (rb->read(pfd, buf, sizeof(buf)) != sizeof(buf))
+        return false;
+
+    prefs.word_mode        = *p++;
+    prefs.line_mode        = *p++;
+    prefs.view_mode        = *p++;
+    prefs.encoding         = *p++;
+    prefs.scrollbar_mode   = *p++;
+    prefs.need_scrollbar   = *p++;
+    prefs.page_mode        = *p++;
+    prefs.header_mode      = *p++;
+    prefs.footer_mode      = *p++;
+    prefs.scroll_mode      = *p++;
+    prefs.autoscroll_speed = *p++;
+    rb->memcpy(prefs.font, p, MAX_PATH);
+
+    return true;
+}
+
+static bool viewer_write_preferences(int pfd)
+{
+    unsigned char buf[PREFERENCES_SIZE];
+    unsigned char *p = buf;
+
+    *p++ = prefs.word_mode;
+    *p++ = prefs.line_mode;
+    *p++ = prefs.view_mode;
+    *p++ = prefs.encoding;
+    *p++ = prefs.scrollbar_mode;
+    *p++ = prefs.need_scrollbar;
+    *p++ = prefs.page_mode;
+    *p++ = prefs.header_mode;
+    *p++ = prefs.footer_mode;
+    *p++ = prefs.scroll_mode;
+    *p++ = prefs.autoscroll_speed;
+    rb->memcpy(p, prefs.font, MAX_PATH);
+
+    return (rb->write(pfd, buf, sizeof(buf)) == sizeof(buf));
+}
+
+static bool viewer_load_global_settings(void)
+{
+    unsigned buf[GLOBAL_SETTINGS_H_SIZE];
+    int sfd = rb->open(GLOBAL_SETTINGS_FILE, O_RDONLY);
+
+    if (sfd < 0)
+        return false;
+
+    if ((rb->read(sfd, buf, GLOBAL_SETTINGS_H_SIZE) != GLOBAL_SETTINGS_H_SIZE) ||
+        rb->memcmp(buf, GLOBAL_SETTINGS_HEADER, GLOBAL_SETTINGS_H_SIZE) ||
+        !viewer_read_preferences(sfd))
+     {
+        rb->close(sfd);
+        return false;
+    }
+    rb->close(sfd);
+    return true;
+}
+
+static bool viewer_save_global_settings(void)
+{
+    int sfd = rb->open(GLOBAL_SETTINGS_TMP_FILE, O_WRONLY|O_CREAT|O_TRUNC);
+
+    if (sfd < 0)
+         return false;
+
+    if (rb->write(sfd, &GLOBAL_SETTINGS_HEADER, GLOBAL_SETTINGS_H_SIZE)
+        != GLOBAL_SETTINGS_H_SIZE ||
+        !viewer_write_preferences(sfd))
+    {
+        rb->close(sfd);
+        rb->remove(GLOBAL_SETTINGS_TMP_FILE);
+        return false;
+    }
+    rb->close(sfd);
+    rb->remove(GLOBAL_SETTINGS_FILE);
+    rb->rename(GLOBAL_SETTINGS_TMP_FILE, GLOBAL_SETTINGS_FILE);
+    return true;
+}
+
+void viewer_load_settings(void)
+{
+    unsigned char buf[MAX_PATH+2];
+    unsigned int fcount;
+    unsigned int i;
+    bool res = false;
+    int sfd;
+    unsigned int size;
+
+    sfd = rb->open(SETTINGS_FILE, O_RDONLY);
+    if (sfd < 0)
+        goto read_end;
+
+    if ((rb->read(sfd, buf, SETTINGS_H_SIZE+2) != SETTINGS_H_SIZE+2) ||
+        rb->memcmp(buf, SETTINGS_HEADER, SETTINGS_H_SIZE))
+    {
+        /* illegal setting file */
+        rb->close(sfd);
+
+        if (rb->file_exists(SETTINGS_FILE))
+            rb->remove(SETTINGS_FILE);
+
+        goto read_end;
+    }
+
+    fcount = (buf[SETTINGS_H_SIZE] << 8) | buf[SETTINGS_H_SIZE+1];
+    for (i = 0; i < fcount; i++)
+    {
+        if (rb->read(sfd, buf, MAX_PATH+2) != MAX_PATH+2)
+            break;
+
+        size = (buf[MAX_PATH] << 8) | buf[MAX_PATH+1];
+        if (rb->strcmp(buf, file_name))
+        {
+            if (rb->lseek(sfd, size, SEEK_CUR) < 0)
+                break;
+            continue;
+        }
+        if (!viewer_read_preferences(sfd))
+            break;
+
+        res = viewer_read_bookmark_infos(sfd);
+        break;
+    }
+
+    rb->close(sfd);
+
+read_end:
+    if (!res)
+    {
+        /* load global settings */
+        if (!viewer_load_global_settings())
+            viewer_default_preferences();
+
+        file_pos = 0;
+        screen_top_ptr = buffer;
+        cpage = 1;
+        cline = 1;
+        bookmark_count = 0;
+    }
+
+    rb->memcpy(&old_prefs, &prefs, sizeof(struct preferences));
+    calc_max_width();
+
+    if (bookmark_count > 1)
+        viewer_select_bookmark(-1);
+    else if (bookmark_count == 1)
+    {
+        int screen_pos;
+        int screen_top;
+
+        screen_pos = bookmarks[0].file_position;
+        screen_top = screen_pos % buffer_size;
+        file_pos = screen_pos - screen_top;
+        screen_top_ptr = buffer + screen_top;
+        cpage = bookmarks[0].page;
+        cline = bookmarks[0].line;
+    }
+
+    viewer_remove_last_read_bookmark();
+
+    check_bom();
+    get_filesize();
+
+    buffer_end = BUFFER_END();  /* Update whenever file_pos changes */
+
+    if (BUFFER_OOB(screen_top_ptr))
+        screen_top_ptr = buffer;
+
+    fill_buffer(file_pos, buffer, buffer_size);
+    if (prefs.scroll_mode == PAGE && cline > 1)
+        viewer_scroll_to_top_line();
+
+    /* remember the current position */
+    start_position = file_pos + screen_top_ptr - buffer;
+
+#ifdef HAVE_LCD_BITMAP
+    if (rb->strcmp(prefs.font, rb->global_settings->font_file))
+        change_font(prefs.font);
+
+    init_need_scrollbar();
+    init_header_and_footer();
+#endif
+}
+
+bool viewer_save_settings(void)
+{
+    unsigned char buf[MAX_PATH+2];
+    unsigned int fcount = 0;
+    unsigned int i;
+    int idx;
+    int ofd;
+    int tfd;
+    off_t first_copy_size = 0;
+    off_t second_copy_start_pos = 0;
+    off_t size;
+
+    /* add reading page to bookmarks */
+    idx = viewer_find_bookmark(cpage, cline);
+    if (idx >= 0)
+        bookmarks[idx].flag |= BOOKMARK_LAST;
+    else
+    {
+        viewer_add_bookmark(cpage, cline);
+        bookmarks[bookmark_count-1].flag = BOOKMARK_LAST;
+    }
+  
+    tfd = rb->open(SETTINGS_TMP_FILE, O_WRONLY|O_CREAT|O_TRUNC);
+    if (tfd < 0)
+        return false;
+
+    ofd = rb->open(SETTINGS_FILE, O_RDWR);
+    if (ofd >= 0)
+    {
+        if ((rb->read(ofd, buf, SETTINGS_H_SIZE+2) != SETTINGS_H_SIZE+2) ||
+            rb->memcmp(buf, SETTINGS_HEADER, SETTINGS_H_SIZE))
+        {
+            rb->close(ofd);
+            goto save_err;
+        }
+        fcount = (buf[SETTINGS_H_SIZE] << 8) | buf[SETTINGS_H_SIZE+1];
+
+        for (i = 0; i < fcount; i++)
+        {
+            if (rb->read(ofd, buf, MAX_PATH+2) != MAX_PATH+2)
+            {
+                rb->close(ofd);
+                goto save_err;
+            }
+            size = (buf[MAX_PATH] << 8) | buf[MAX_PATH+1];
+            if (rb->strcmp(buf, file_name))
+            {
+                if (rb->lseek(ofd, size, SEEK_CUR) < 0)
+                {
+                    rb->close(ofd);
+                    goto save_err;
+                }
+            }
+            else
+            {
+                first_copy_size = rb->lseek(ofd, 0, SEEK_CUR);
+                if (first_copy_size < 0)
+                {
+                    rb->close(ofd);
+                    goto save_err;
+                }
+                second_copy_start_pos = first_copy_size + size;
+                first_copy_size -= MAX_PATH+2;
+                fcount--;
+                break;
+            }
+        }
+        if (first_copy_size == 0)
+            first_copy_size = rb->filesize(ofd);
+
+        if (!copy_bookmark_file(ofd, tfd, 0, first_copy_size))
+        {
+            rb->close(ofd);
+            goto save_err;
+        }
+        if (second_copy_start_pos > 0)
+        {
+            if (!copy_bookmark_file(ofd, tfd, second_copy_start_pos,
+                                    rb->filesize(ofd) - second_copy_start_pos))
+            {
+                rb->close(ofd);
+                goto save_err;
+            }
+        }
+        rb->close(ofd);
+    }
+    else
+    {
+        rb->memcpy(buf, SETTINGS_HEADER, SETTINGS_H_SIZE);
+        buf[SETTINGS_H_SIZE] = 0;
+        buf[SETTINGS_H_SIZE+1] = 0;
+        if (rb->write(tfd, buf, SETTINGS_H_SIZE+2) != SETTINGS_H_SIZE+2)
+            goto save_err;
+    }
+
+    /* copy to current read file's bookmarks */
+    rb->memset(buf, 0, MAX_PATH);
+    rb->snprintf(buf, MAX_PATH, "%s", file_name);
+
+    size = PREFERENCES_SIZE + bookmark_count * BOOKMARK_SIZE + 1;
+    buf[MAX_PATH] = size >> 8;
+    buf[MAX_PATH+1] = size;
+
+    if (rb->write(tfd, buf, MAX_PATH+2) != MAX_PATH+2)
+        goto save_err;
+
+    if (!viewer_write_preferences(tfd))
+        goto save_err;
+
+    if (!viewer_write_bookmark_infos(tfd))
+        goto save_err;
+
+    if (rb->lseek(tfd, SETTINGS_H_SIZE, SEEK_SET) < 0)
+        goto save_err;
+
+    fcount++;
+    buf[0] = fcount >> 8;
+    buf[1] = fcount;
+
+    if (rb->write(tfd, buf, 2) != 2)
+        goto save_err;
+
+    rb->close(tfd);
+
+    rb->remove(SETTINGS_FILE);
+    rb->rename(SETTINGS_TMP_FILE, SETTINGS_FILE);
+
+    return true;
+
+save_err:
+    rb->close(tfd);
+    rb->remove(SETTINGS_TMP_FILE);
+    return false;
+}