Fix searching in paged mode

src/calibre/ebooks/oeb/display/paged.coffee

@@ -140,6 +140,9 @@ class PagedDisplay
     scroll_to_xpos: (xpos) ->
         # Scroll so that the column containing xpos is the left most column in
         # the viewport
+        if typeof(xpos) != 'number'
+            log(xpos, 'is not a number, cannot scroll to it!')
+            return
         pos = 0
         until (pos <= xpos < pos + this.page_width)
             pos += this.page_width
@@ -206,6 +209,9 @@ class PagedDisplay
         return ans
 
     jump_to_anchor: (name) ->
+        # Jump to the element identified by anchor name. Ensures that the left
+        # most column in the viewport is the column containing the start of the
+        # element and that the scroll position is at the start of the column.
         elem = document.getElementById(name)
         if !elem
             elems = document.getElementsByName(name)
@@ -218,6 +224,16 @@ class PagedDisplay
             # Ensure we are scrolled to the column containing elem
             this.scroll_to_xpos(absleft(elem) + 5)
 
+    snap_to_selection: () ->
+        sel = window.getSelection()
+        r = sel.getRangeAt(0).getBoundingClientRect()
+        node = sel.anchorNode
+        left = viewport_to_document(r.left, r.top, doc=node.ownerDocument)[0]
+        if this.in_paged_mode
+            # Ensure we are scrolled to the column containing the start of the
+            # selection
+            this.scroll_to_xpos(left+5)
+
 if window?
     window.paged_display = new PagedDisplay()
 

src/calibre/gui2/viewer/documentview.py

@@ -588,9 +588,11 @@ class DocumentView(QWebView): # {{{
         return property(fget=fget, fset=fset)
 
     def search(self, text, backwards=False):
-        if backwards:
-            return self.findText(text, self.document.FindBackward)
-        return self.findText(text)
+        flags = self.document.FindBackward if backwards else self.document.FindFlags(0)
+        found = self.findText(text, flags)
+        if found and self.document.in_paged_mode:
+            self.document.javascript('paged_display.snap_to_selection()')
+        return found
 
     def path(self):
         return os.path.abspath(unicode(self.url().toLocalFile()))