To allow scrolling in Safari mobile, we set the content of text_view_comments frame in a jQuery UI layout. So the automated scrolling operations in c_sync.js must be adjustable to the right part to scroll. Also, if a comment have to be shown outside of the current viewport, we scroll the correct part to that viewport and then set the comment top Y offset to juste what it needs to avoid the "Add comment" button after scrolling operation. If not in Safari mobile, we add an offset here to avoid comment to display under the "Add comment" button.

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# taken from plone

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import os

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bin_search_path = [

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    '/usr/bin',

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    '/usr/local/bin',

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    ]

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class MissingBinary(Exception): pass

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def bin_search(binary):

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    """search the bin_search_path  for a given binary

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    returning its fullname or None"""

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    result = None

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    mode   = os.R_OK | os.X_OK

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    for p in bin_search_path:

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        path = os.path.join(p, binary)

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        if os.access(path, mode) == 1:

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            result = path

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            break

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    else:

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        raise MissingBinary('Unable to find binary "%s"' % binary)

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    return result