text viewer: can select "move to prev/next page" or "move to top page/bottom page" when LEFT/RIGHT key is pressed (narrow mode).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26719 a1c6a512-1295-4272-9138-f99709370657

apps/plugins/text_viewer/readme.txt

@@ -52,5 +52,3 @@ TODO list
 
   - more treatments of line breaking, word wrappings.
     (for example, period does not appear the top of line.)
-
-  - whether scroll to prev/next page or scroll to top page/bottom page can be select the settings menu.

apps/plugins/text_viewer/text_viewer.c

@@ -114,12 +114,16 @@ enum plugin_status plugin_start(const void* file)
                     tv_scroll_left(TV_HORIZONTAL_SCROLL_PREFS);
                 }
                 else {   /* prefs->windows == 1 */
+                    if (prefs->narrow_mode == NM_PAGE)
+                    {
                         /* scroll to previous page */
                         tv_scroll_up(TV_VERTICAL_SCROLL_PAGE);
-#if 0
+                    }
+                    else
+                    {
                         /* Top of file */
                         tv_top();
-#endif
+                    }
                 }
                 break;
 
@@ -131,12 +135,16 @@ enum plugin_status plugin_start(const void* file)
                     tv_scroll_right(TV_HORIZONTAL_SCROLL_PREFS);
                 }
                 else {   /* prefs->windows == 1 */
+                    if (prefs->narrow_mode == NM_PAGE)
+                    {
                         /* scroll to next page */
                         tv_scroll_down(TV_VERTICAL_SCROLL_PAGE);
-#if 0
+                    }
+                    else
+                    {
                         /* Bottom of file */
                         tv_bottom();
-#endif
+                    }
                 }
                 break;
 

apps/plugins/text_viewer/tv_menu.c

@@ -117,6 +117,17 @@ static bool tv_autoscroll_speed_setting(void)
                        &new_prefs.autoscroll_speed, NULL, 1, 1, 10, NULL);
 }
 
+static bool tv_narrow_mode_setting(void)
+{
+    static const struct opt_items names[] = {
+        {"Previous/Next Page", -1},
+        {"Top/Bottom Page",    -1},
+    };
+
+    return rb->set_option("Left/Right Key", &new_prefs.narrow_mode, INT,
+                          names, 2, NULL);
+}
+
 #ifdef HAVE_LCD_BITMAP
 MENUITEM_FUNCTION(vertical_scrollbar_item, 0, "Scrollbar",
                   tv_vertical_scrollbar_setting,
@@ -128,12 +139,15 @@ MENUITEM_FUNCTION(page_mode_item, 0, "Overlap Pages", tv_page_mode_setting,
                   NULL, NULL, Icon_NOICON);
 MENUITEM_FUNCTION(autoscroll_speed_item, 0, "Auto-Scroll Speed",
                   tv_autoscroll_speed_setting, NULL, NULL, Icon_NOICON);
+MENUITEM_FUNCTION(narrow_mode_item, 0, "Left/Right Key (Narrow mode)",
+                  tv_narrow_mode_setting, NULL, NULL, Icon_NOICON);
 
 MAKE_MENU(vertical_scroll_menu, "Vertical", NULL, Icon_NOICON,
 #ifdef HAVE_LCD_BITMAP
           &vertical_scrollbar_item,
 #endif
-          &vertical_scroll_mode_item, &page_mode_item, &autoscroll_speed_item);
+          &vertical_scroll_mode_item, &page_mode_item, &autoscroll_speed_item,
+          &narrow_mode_item);
 
 /*                      */
 /* scroll settings menu */

apps/plugins/text_viewer/tv_preferences.c

@@ -43,6 +43,7 @@ static void tv_notify_change_preferences(const struct tv_preferences *oldp,
      *   - page_mode
      *   - font
      *   - autoscroll_speed
+     *   - narrow_mode
      */
     if ((oldp == NULL)                                             ||
         (oldp->word_mode            != newp->word_mode)            ||
@@ -111,6 +112,7 @@ void tv_set_default_preferences(struct tv_preferences *p)
     p->footer_mode = FT_NONE;
 #endif
     p->autoscroll_speed = 1;
+    p->narrow_mode = NM_PAGE;
     /* Set codepage to system default */
     p->encoding = rb->global_settings->default_codepage;
     p->file_name[0] = '\0';

apps/plugins/text_viewer/tv_preferences.h

@@ -84,6 +84,11 @@ struct tv_preferences {
 
     int windows;
 
+    enum {
+        NM_PAGE = 0,
+        NM_TOP_BOTTOM,
+    } narrow_mode;
+
     unsigned char font_name[MAX_PATH];
 #ifdef HAVE_LCD_BITMAP
     struct font *font;

apps/plugins/text_viewer/tv_settings.c

@@ -48,7 +48,8 @@
  * autoscroll_speed       1
  * horizontal_scrollbar   1
  * horizontal_scroll_mode 1
- * (reserved)             14
+ * narrow_mode            1
+ * (reserved)             13
  * font name              MAX_PATH
  */
 
@@ -56,7 +57,7 @@
 #define TV_GLOBAL_SETTINGS_FILE          VIEWERS_DIR "/tv_global.dat"
 
 #define TV_GLOBAL_SETTINGS_HEADER        "\x54\x56\x47\x53" /* "TVGS" */
-#define TV_GLOBAL_SETTINGS_VERSION       0x35
+#define TV_GLOBAL_SETTINGS_VERSION       0x36
 #define TV_GLOBAL_SETTINGS_HEADER_SIZE   5
 #define TV_GLOBAL_SETTINGS_FIRST_VERSION 0x31
 
@@ -88,7 +89,8 @@
  *     autoscroll_speed       1
  *     horizontal_scrollbar   1
  *     horizontal_scroll_mode 1
- *     (reserved)             14
+ *     narrow_mode            1
+ *     (reserved)             13
  *     font name              MAX_PATH
  *   bookmark count           1
  *   [1st bookmark]
@@ -110,7 +112,7 @@
 #define TV_SETTINGS_TMP_FILE      VIEWERS_DIR "/tv_file.tmp"
 
 #define TV_SETTINGS_HEADER        "\x54\x56\x53" /* "TVS" */
-#define TV_SETTINGS_VERSION       0x36
+#define TV_SETTINGS_VERSION       0x37
 #define TV_SETTINGS_HEADER_SIZE   4
 #define TV_SETTINGS_FIRST_VERSION 0x32
 
@@ -167,6 +169,11 @@ static bool tv_read_preferences(int pfd, int version, struct tv_preferences *pre
     else
         prefs->horizontal_scroll_mode = SCREEN;
 
+    if (version > 4)
+        prefs->narrow_mode = *p++;
+    else
+        prefs->narrow_mode = NM_PAGE;
+
     rb->memcpy(prefs->font_name, buf + read_size - MAX_PATH, MAX_PATH);
 
 #ifdef HAVE_LCD_BITMAP
@@ -196,6 +203,7 @@ static bool tv_write_preferences(int pfd, const struct tv_preferences *prefs)
     *p++ = prefs->autoscroll_speed;
     *p++ = prefs->horizontal_scrollbar;
     *p++ = prefs->horizontal_scroll_mode;
+    *p++ = prefs->narrow_mode;
 
     rb->memcpy(buf + 28, prefs->font_name, MAX_PATH);