Store: Info about ACSM. Change MobileRead to use SearchResult instead of BookRef.

src/calibre/gui2/store/mobileread_plugin.py

@@ -97,12 +97,12 @@ class MobileReadStore(BasicStoreConfig, StorePlugin):
             if not raw_data:
                 return
             
-            # Turn books listed in the HTML file into BookRef's.
+            # Turn books listed in the HTML file into SearchResults's.
             books = []
             try:
                 data = html.fromstring(raw_data)
                 for book_data in data.xpath('//ul/li'):
-                    book = BookRef()
+                    book = SearchResult()
                     book.detail_item = ''.join(book_data.xpath('.//a/@href'))
                     book.formats = ''.join(book_data.xpath('.//i/text()'))
                     book.formats = book.formats.strip()
@@ -126,12 +126,6 @@ class MobileReadStore(BasicStoreConfig, StorePlugin):
         return self.config.get(self.name + '_book_list', [])
 
 
-class BookRef(SearchResult):
-    
-    def __init__(self):
-        SearchResult.__init__(self)
-
-
 class MobeReadStoreDialog(QDialog, Ui_Dialog):
     
     def __init__(self, plugin, *args):

src/calibre/gui2/store/web_control.py

@@ -68,6 +68,18 @@ class NPWebView(QWebView):
         filename = get_download_filename(url, cf)
         ext = os.path.splitext(filename)[1][1:].lower()
         if ext not in BOOK_EXTENSIONS:
+            if ext == 'acsm':
+                from calibre.gui2.dialogs.confirm_delete import confirm
+                confirm(_('<p>You have selected to download an ebook that uses '
+                          'the ACSM format. ACSM files are not ebook files but '
+                          'pointers '
+                          '<a href="http://www.adobe.com/products/digitaleditions/">'
+                          'Adobe Digital Editions</a> (ADE) uses so it can download '
+                          'the ebook and apply DRM to it. You will be prompted to save this '
+                          'file to your computer. Then open it using ADE. Once ADE has '
+                          'downloaded the actual ebook you can add the book to calibre '
+                          'using Add and selecting the file from the ADE library folder.'),
+                          'acsm_download', self)
             home = os.path.expanduser('~')
             name = QFileDialog.getSaveFileName(self,
                 _('File is not a supported ebook type. Save to disk?'),