From 14ef8b32f2a492e831df4d5915a99284ba5b26ce Mon Sep 17 00:00:00 2001
From: Sayamindu Dasgupta <sayamindu@gmail.com>
Date: Sun, 22 Feb 2009 20:37:49 +0000
Subject: Enable jumping between bookmarks (jump to next/previous bookmark

---
diff --git a/readdb.py b/readdb.py
index 3166205..0ad6eb5 100644
--- a/readdb.py
+++ b/readdb.py
@@ -46,7 +46,7 @@ class BookmarkManager:
 
     def _populate_bookmarks(self):
         # TODO: Figure out if caching the entire set of bookmarks is a good idea or not
-        self._cur.execute('select * from bookmarks where md5=?', (self._filehash,))
+        self._cur.execute('select * from bookmarks where md5=? order by page', (self._filehash,))
 
         for row in self._cur:
             self._bookmarks.append(Bookmark(row))
@@ -63,3 +63,33 @@ class BookmarkManager:
         # To be called when a new bookmark has been added/removed
         self._bookmarks = []
         self._populate_bookmarks()
+
+
+    def get_prev_bookmark_for_page(self, page, wrap = True):
+        if not len(self._bookmarks):
+            return None
+        
+        if page <= self._bookmarks[0].page_no and wrap:
+            return self._bookmarks[-1]
+        else:
+            for i in range(page-1, -1, -1):
+                for bookmark in self._bookmarks:
+                    if bookmark.belongstopage(i):
+                        return bookmark
+                
+        return None 
+
+
+    def get_next_bookmark_for_page(self, page, wrap = True):
+        if not len(self._bookmarks):
+            return None
+        
+        if page >= self._bookmarks[-1].page_no and wrap:
+            return self._bookmarks[0]
+        else:
+            for i in range(page+1, self._bookmarks[-1].page_no + 1):
+                for bookmark in self._bookmarks:
+                    if bookmark.belongstopage(i):
+                        return bookmark
+        
+        return None            
diff --git a/readsidebar.py b/readsidebar.py
index 4f2dec3..c73c1ad 100644
--- a/readsidebar.py
+++ b/readsidebar.py
@@ -60,6 +60,9 @@ class Sidebar(gtk.EventBox):
     
     def set_bookmarkmanager(self, filehash):
         self._bookmark_manager = BookmarkManager(filehash)
+        
+    def get_bookmarkmanager(self):
+        return (self._bookmark_manager)
     
     def update_for_page(self, page):
         self._clear_bookmarks()
diff --git a/readtoolbar.py b/readtoolbar.py
index 07a60c9..77825ec 100644
--- a/readtoolbar.py
+++ b/readtoolbar.py
@@ -192,14 +192,32 @@ class ReadToolbar(gtk.Toolbar):
         self._back = ToolButton('go-previous')
         self._back.set_tooltip(_('Back'))
         self._back.props.sensitive = False
+        palette = self._back.get_palette()
+        self._prev_page = MenuItem(text_label= _("Previous page"))
+        palette.menu.append(self._prev_page) 
+        self._prev_page.show_all()        
+        self._prev_bookmark = MenuItem(text_label= _("Previous bookmark"))
+        palette.menu.append(self._prev_bookmark) 
+        self._prev_bookmark.show_all()
         self._back.connect('clicked', self._go_back_cb)
+        self._prev_page.connect('activate', self._go_back_cb)
+        self._prev_bookmark.connect('activate', self._prev_bookmark_activate_cb)
         self.insert(self._back, -1)
         self._back.show()
 
         self._forward = ToolButton('go-next')
         self._forward.set_tooltip(_('Forward'))
         self._forward.props.sensitive = False
+        palette = self._forward.get_palette()
+        self._next_page = MenuItem(text_label= _("Next page"))
+        palette.menu.append(self._next_page) 
+        self._next_page.show_all()        
+        self._next_bookmark = MenuItem(text_label= _("Next bookmark"))
+        palette.menu.append(self._next_bookmark) 
+        self._next_bookmark.show_all()
         self._forward.connect('clicked', self._go_forward_cb)
+        self._next_page.connect('activate', self._go_forward_cb)
+        self._next_bookmark.connect('activate', self._next_bookmark_activate_cb)
         self.insert(self._forward, -1)
         self._forward.show()
 
@@ -304,6 +322,22 @@ class ReadToolbar(gtk.Toolbar):
     def _go_forward_cb(self, button):
         self._evince_view.next_page()
 
+    def _prev_bookmark_activate_cb(self, menuitem):
+        page = self._document.get_page_cache().get_current_page()
+        bookmarkmanager = self._sidebar.get_bookmarkmanager()
+        
+        prev_bookmark = bookmarkmanager.get_prev_bookmark_for_page(page)
+        if prev_bookmark is not None:
+            self._document.get_page_cache().set_current_page(prev_bookmark.page_no)
+                
+    def _next_bookmark_activate_cb(self, menuitem):
+        page = self._document.get_page_cache().get_current_page()
+        bookmarkmanager = self._sidebar.get_bookmarkmanager()
+        
+        next_bookmark = bookmarkmanager.get_next_bookmark_for_page(page)
+        if next_bookmark is not None:
+            self._document.get_page_cache().set_current_page(next_bookmark.page_no)
+        
     def _bookmarker_toggled_cb(self, button):
         page = self._document.get_page_cache().get_current_page()
         if self._bookmarker.props.active:
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