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# -*- coding: utf-8 -*-
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# Copyright (c) 2007-2012 Christoph Haas <email@christoph-haas.de>
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# NOTE: MIT license based code, backported and edited by RhodeCode GmbH
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"""
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paginate: helps split up large collections into individual pages
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================================================================
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What is pagination?
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---------------------
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This module helps split large lists of items into pages. The user is shown one page at a time and
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can navigate to other pages. Imagine you are offering a company phonebook and let the user search
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the entries. The entire search result may contains 23 entries but you want to display no more than
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10 entries at once. The first page contains entries 1-10, the second 11-20 and the third 21-23.
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Each "Page" instance represents the items of one of these three pages.
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See the documentation of the "Page" class for more information.
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How do I use it?
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------------------
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A page of items is represented by the *Page* object. A *Page* gets initialized with these arguments:
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- The collection of items to pick a range from. Usually just a list.
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- The page number you want to display. Default is 1: the first page.
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Now we can make up a collection and create a Page instance of it::
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# Create a sample collection of 1000 items
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>> my_collection = range(1000)
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# Create a Page object for the 3rd page (20 items per page is the default)
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>> my_page = Page(my_collection, page=3)
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# The page object can be printed as a string to get its details
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>> str(my_page)
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Page:
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Collection type: <type 'range'>
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Current page: 3
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First item: 41
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Last item: 60
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First page: 1
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Last page: 50
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Previous page: 2
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Next page: 4
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Items per page: 20
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Number of items: 1000
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Number of pages: 50
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# Print a list of items on the current page
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>> my_page.items
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[40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59]
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# The *Page* object can be used as an iterator:
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>> for my_item in my_page: print(my_item)
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40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
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# The .pager() method returns an HTML fragment with links to surrounding pages.
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>> my_page.pager(url="http://example.org/foo/page=$page")
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<a href="http://example.org/foo/page=1">1</a>
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<a href="http://example.org/foo/page=2">2</a>
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3
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<a href="http://example.org/foo/page=4">4</a>
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<a href="http://example.org/foo/page=5">5</a>
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..
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<a href="http://example.org/foo/page=50">50</a>'
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# Without the HTML it would just look like:
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# 1 2 [3] 4 5 .. 50
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# The pager can be customized:
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>> my_page.pager('$link_previous ~3~ $link_next (Page $page of $page_count)',
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url="http://example.org/foo/page=$page")
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<a href="http://example.org/foo/page=2"><</a>
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<a href="http://example.org/foo/page=1">1</a>
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<a href="http://example.org/foo/page=2">2</a>
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3
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<a href="http://example.org/foo/page=4">4</a>
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<a href="http://example.org/foo/page=5">5</a>
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<a href="http://example.org/foo/page=6">6</a>
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..
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<a href="http://example.org/foo/page=50">50</a>
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<a href="http://example.org/foo/page=4">></a>
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(Page 3 of 50)
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# Without the HTML it would just look like:
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# 1 2 [3] 4 5 6 .. 50 > (Page 3 of 50)
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# The url argument to the pager method can be omitted when an url_maker is
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# given during instantiation:
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>> my_page = Page(my_collection, page=3,
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url_maker=lambda p: "http://example.org/%s" % p)
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>> page.pager()
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There are some interesting parameters that customize the Page's behavior. See the documentation on
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``Page`` and ``Page.pager()``.
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Notes
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-------
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Page numbers and item numbers start at 1. This concept has been used because users expect that the
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first page has number 1 and the first item on a page also has number 1. So if you want to use the
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page's items by their index number please note that you have to subtract 1.
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"""
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import re
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from string import Template
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from webhelpers2.html import literal
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def make_html_tag(tag, text=None, **params):
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"""Create an HTML tag string.
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tag
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The HTML tag to use (e.g. 'a', 'span' or 'div')
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text
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The text to enclose between opening and closing tag. If no text is specified then only
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the opening tag is returned.
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Example::
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make_html_tag('a', text="Hello", href="/another/page")
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-> <a href="/another/page">Hello</a>
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To use reserved Python keywords like "class" as a parameter prepend it with
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an underscore. Instead of "class='green'" use "_class='green'".
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Warning: Quotes and apostrophes are not escaped."""
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params_string = ""
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# Parameters are passed. Turn the dict into a string like "a=1 b=2 c=3" string.
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for key, value in sorted(params.items()):
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# Strip off a leading underscore from the attribute's key to allow attributes like '_class'
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# to be used as a CSS class specification instead of the reserved Python keyword 'class'.
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key = key.lstrip("_")
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params_string += ' {0}="{1}"'.format(key, value)
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# Create the tag string
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tag_string = "<{0}{1}>".format(tag, params_string)
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# Add text and closing tag if required.
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if text:
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tag_string += "{0}</{1}>".format(text, tag)
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return tag_string
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# Since the items on a page are mainly a list we subclass the "list" type
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class _Page(list):
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"""A list/iterator representing the items on one page of a larger collection.
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An instance of the "Page" class is created from a _collection_ which is any
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list-like object that allows random access to its elements.
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The instance works as an iterator running from the first item to the last item on the given
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page. The Page.pager() method creates a link list allowing the user to go to other pages.
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A "Page" does not only carry the items on a certain page. It gives you additional information
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about the page in these "Page" object attributes:
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item_count
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Number of items in the collection
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**WARNING:** Unless you pass in an item_count, a count will be
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performed on the collection every time a Page instance is created.
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page
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Number of the current page
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items_per_page
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Maximal number of items displayed on a page
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first_page
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Number of the first page - usually 1 :)
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last_page
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Number of the last page
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previous_page
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Number of the previous page. If this is the first page it returns None.
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next_page
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Number of the next page. If this is the last page it returns None.
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page_count
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Number of pages
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items
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Sequence/iterator of items on the current page
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first_item
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Index of first item on the current page - starts with 1
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last_item
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Index of last item on the current page
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"""
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def __init__(
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self,
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collection,
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page=1,
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items_per_page=20,
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item_count=None,
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wrapper_class=None,
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url_maker=None,
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bar_size=10,
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**kwargs
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):
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"""Create a "Page" instance.
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Parameters:
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collection
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Sequence representing the collection of items to page through.
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page
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The requested page number - starts with 1. Default: 1.
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items_per_page
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The maximal number of items to be displayed per page.
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Default: 20.
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item_count (optional)
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The total number of items in the collection - if known.
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If this parameter is not given then the paginator will count
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the number of elements in the collection every time a "Page"
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is created. Giving this parameter will speed up things. In a busy
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real-life application you may want to cache the number of items.
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url_maker (optional)
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Callback to generate the URL of other pages, given its numbers.
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Must accept one int parameter and return a URI string.
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bar_size
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maximum size of rendered pages numbers within radius
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"""
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if collection is not None:
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if wrapper_class is None:
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# Default case. The collection is already a list-type object.
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self.collection = collection
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else:
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# Special case. A custom wrapper class is used to access elements of the collection.
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self.collection = wrapper_class(collection)
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else:
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self.collection = []
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self.collection_type = type(collection)
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if url_maker is not None:
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self.url_maker = url_maker
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else:
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self.url_maker = self._default_url_maker
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self.bar_size = bar_size
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# Assign kwargs to self
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self.kwargs = kwargs
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# The self.page is the number of the current page.
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# The first page has the number 1!
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try:
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self.page = int(page) # make it int() if we get it as a string
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except (ValueError, TypeError):
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self.page = 1
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# normally page should be always at least 1 but the original maintainer
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# decided that for empty collection and empty page it can be...0? (based on tests)
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# preserving behavior for BW compat
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if self.page < 1:
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self.page = 1
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self.items_per_page = items_per_page
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# We subclassed "list" so we need to call its init() method
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# and fill the new list with the items to be displayed on the page.
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# We use list() so that the items on the current page are retrieved
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# only once. In an SQL context that could otherwise lead to running the
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# same SQL query every time items would be accessed.
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# We do this here, prior to calling len() on the collection so that a
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# wrapper class can execute a query with the knowledge of what the
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# slice will be (for efficiency) and, in the same query, ask for the
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# total number of items and only execute one query.
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try:
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first = (self.page - 1) * items_per_page
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last = first + items_per_page
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self.items = list(self.collection[first:last])
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except TypeError as err:
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raise TypeError(
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f"Your collection of type {type(self.collection)} cannot be handled "
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f"by paginate. ERROR:{err}"
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)
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# Unless the user tells us how many items the collections has
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# we calculate that ourselves.
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if item_count is not None:
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self.item_count = item_count
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else:
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self.item_count = len(self.collection)
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# Compute the number of the first and last available page
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if self.item_count > 0:
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self.first_page = 1
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self.page_count = ((self.item_count - 1) // self.items_per_page) + 1
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self.last_page = self.first_page + self.page_count - 1
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# Make sure that the requested page number is the range of valid pages
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if self.page > self.last_page:
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self.page = self.last_page
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elif self.page < self.first_page:
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self.page = self.first_page
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# Note: the number of items on this page can be less than
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# items_per_page if the last page is not full
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self.first_item = (self.page - 1) * items_per_page + 1
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self.last_item = min(self.first_item + items_per_page - 1, self.item_count)
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# Links to previous and next page
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if self.page > self.first_page:
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self.previous_page = self.page - 1
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else:
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self.previous_page = None
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if self.page < self.last_page:
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self.next_page = self.page + 1
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else:
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self.next_page = None
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# No items available
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else:
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self.first_page = None
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self.page_count = 0
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self.last_page = None
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self.first_item = None
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self.last_item = None
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self.previous_page = None
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self.next_page = None
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self.items = []
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# This is a subclass of the 'list' type. Initialise the list now.
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list.__init__(self, self.items)
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def __str__(self):
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return (
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"Page:\n"
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"Collection type: {0.collection_type}\n"
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"Current page: {0.page}\n"
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"First item: {0.first_item}\n"
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"Last item: {0.last_item}\n"
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"First page: {0.first_page}\n"
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"Last page: {0.last_page}\n"
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"Previous page: {0.previous_page}\n"
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"Next page: {0.next_page}\n"
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"Items per page: {0.items_per_page}\n"
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"Total number of items: {0.item_count}\n"
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"Number of pages: {0.page_count}\n"
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).format(self)
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def __repr__(self):
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return "<paginate.Page: Page {0}/{1}>".format(self.page, self.page_count)
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def pager(
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self,
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tmpl_format="~2~",
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url=None,
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show_if_single_page=False,
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separator=" ",
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symbol_first="<<",
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symbol_last=">>",
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symbol_previous="<",
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symbol_next=">",
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link_attr=None,
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curpage_attr=None,
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dotdot_attr=None,
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link_tag=None,
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):
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"""
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Return string with links to other pages (e.g. '1 .. 5 6 7 [8] 9 10 11 .. 50').
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tmpl_format:
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Format string that defines how the pager is rendered. The string
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can contain the following $-tokens that are substituted by the
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string.Template module:
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- $first_page: number of first reachable page
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- $last_page: number of last reachable page
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- $page: number of currently selected page
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- $page_count: number of reachable pages
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- $items_per_page: maximal number of items per page
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- $first_item: index of first item on the current page
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- $last_item: index of last item on the current page
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- $item_count: total number of items
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- $link_first: link to first page (unless this is first page)
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- $link_last: link to last page (unless this is last page)
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- $link_previous: link to previous page (unless this is first page)
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- $link_next: link to next page (unless this is last page)
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To render a range of pages the token '~3~' can be used. The
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number sets the radius of pages around the current page.
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Example for a range with radius 3:
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'1 .. 5 6 7 [8] 9 10 11 .. 50'
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Default: '~2~'
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url
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The URL that page links will point to. Make sure it contains the string
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$page which will be replaced by the actual page number.
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Must be given unless a url_maker is specified to __init__, in which
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case this parameter is ignored.
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symbol_first
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String to be displayed as the text for the $link_first link above.
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Default: '<<' (<<)
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symbol_last
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String to be displayed as the text for the $link_last link above.
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Default: '>>' (>>)
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symbol_previous
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String to be displayed as the text for the $link_previous link above.
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Default: '<' (<)
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symbol_next
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String to be displayed as the text for the $link_next link above.
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Default: '>' (>)
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separator:
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String that is used to separate page links/numbers in the above range of pages.
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Default: ' '
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show_if_single_page:
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if True the navigator will be shown even if there is only one page.
|
|
|
|
|
|
Default: False
|
|
|
|
|
|
link_attr (optional)
|
|
|
A dictionary of attributes that get added to A-HREF links pointing to other pages. Can
|
|
|
be used to define a CSS style or class to customize the look of links.
|
|
|
|
|
|
Example: { 'style':'border: 1px solid green' }
|
|
|
Example: { 'class':'pager_link' }
|
|
|
|
|
|
curpage_attr (optional)
|
|
|
A dictionary of attributes that get added to the current page number in the pager (which
|
|
|
is obviously not a link). If this dictionary is not empty then the elements will be
|
|
|
wrapped in a SPAN tag with the given attributes.
|
|
|
|
|
|
Example: { 'style':'border: 3px solid blue' }
|
|
|
Example: { 'class':'pager_curpage' }
|
|
|
|
|
|
dotdot_attr (optional)
|
|
|
A dictionary of attributes that get added to the '..' string in the pager (which is
|
|
|
obviously not a link). If this dictionary is not empty then the elements will be wrapped
|
|
|
in a SPAN tag with the given attributes.
|
|
|
|
|
|
Example: { 'style':'color: #808080' }
|
|
|
Example: { 'class':'pager_dotdot' }
|
|
|
|
|
|
link_tag (optional)
|
|
|
A callable that accepts single argument `page` (page link information)
|
|
|
and generates string with html that represents the link for specific page.
|
|
|
Page objects are supplied from `link_map()` so the keys are the same.
|
|
|
|
|
|
|
|
|
"""
|
|
|
link_attr = link_attr or {}
|
|
|
curpage_attr = curpage_attr or {}
|
|
|
dotdot_attr = dotdot_attr or {}
|
|
|
self.curpage_attr = curpage_attr
|
|
|
self.separator = separator
|
|
|
self.link_attr = link_attr
|
|
|
self.dotdot_attr = dotdot_attr
|
|
|
self.url = url
|
|
|
self.link_tag = link_tag or self.default_link_tag
|
|
|
|
|
|
# Don't show navigator if there is no more than one page
|
|
|
if self.page_count == 0 or (self.page_count == 1 and not show_if_single_page):
|
|
|
return ""
|
|
|
|
|
|
regex_res = re.search(r"~(\d+)~", tmpl_format)
|
|
|
if regex_res:
|
|
|
radius = regex_res.group(1)
|
|
|
else:
|
|
|
radius = 2
|
|
|
|
|
|
self.radius = int(radius)
|
|
|
link_map = self.link_map(
|
|
|
tmpl_format=tmpl_format,
|
|
|
url=url,
|
|
|
show_if_single_page=show_if_single_page,
|
|
|
separator=separator,
|
|
|
symbol_first=symbol_first,
|
|
|
symbol_last=symbol_last,
|
|
|
symbol_previous=symbol_previous,
|
|
|
symbol_next=symbol_next,
|
|
|
link_attr=link_attr,
|
|
|
curpage_attr=curpage_attr,
|
|
|
dotdot_attr=dotdot_attr,
|
|
|
link_tag=link_tag,
|
|
|
)
|
|
|
links_markup = self._range(link_map, self.radius)
|
|
|
|
|
|
# Replace ~...~ in token tmpl_format by range of pages
|
|
|
result = re.sub(r"~(\d+)~", links_markup, tmpl_format)
|
|
|
|
|
|
link_first = (
|
|
|
self.page > self.first_page and self.link_tag(link_map["first_page"]) or ""
|
|
|
)
|
|
|
link_last = (
|
|
|
self.page < self.last_page and self.link_tag(link_map["last_page"]) or ""
|
|
|
)
|
|
|
link_previous = (
|
|
|
self.previous_page and self.link_tag(link_map["previous_page"]) or ""
|
|
|
)
|
|
|
link_next = self.next_page and self.link_tag(link_map["next_page"]) or ""
|
|
|
# Interpolate '$' variables
|
|
|
result = Template(result).safe_substitute(
|
|
|
{
|
|
|
"first_page": self.first_page,
|
|
|
"last_page": self.last_page,
|
|
|
"page": self.page,
|
|
|
"page_count": self.page_count,
|
|
|
"items_per_page": self.items_per_page,
|
|
|
"first_item": self.first_item,
|
|
|
"last_item": self.last_item,
|
|
|
"item_count": self.item_count,
|
|
|
"link_first": link_first,
|
|
|
"link_last": link_last,
|
|
|
"link_previous": link_previous,
|
|
|
"link_next": link_next,
|
|
|
}
|
|
|
)
|
|
|
|
|
|
return result
|
|
|
|
|
|
def _get_edges(self, cur_page, max_page, items):
|
|
|
cur_page = int(cur_page)
|
|
|
edge = (items // 2) + 1
|
|
|
if cur_page <= edge:
|
|
|
radius = max(items // 2, items - cur_page)
|
|
|
elif (max_page - cur_page) < edge:
|
|
|
radius = (items - 1) - (max_page - cur_page)
|
|
|
else:
|
|
|
radius = (items // 2) - 1
|
|
|
|
|
|
left = max(1, (cur_page - radius))
|
|
|
right = min(max_page, cur_page + radius)
|
|
|
return left, right
|
|
|
|
|
|
def link_map(
|
|
|
self,
|
|
|
tmpl_format="~2~",
|
|
|
url=None,
|
|
|
show_if_single_page=False,
|
|
|
separator=" ",
|
|
|
symbol_first="<<",
|
|
|
symbol_last=">>",
|
|
|
symbol_previous="<",
|
|
|
symbol_next=">",
|
|
|
link_attr=None,
|
|
|
curpage_attr=None,
|
|
|
dotdot_attr=None,
|
|
|
link_tag=None
|
|
|
):
|
|
|
""" Return map with links to other pages if default pager() function is not suitable solution.
|
|
|
tmpl_format:
|
|
|
Format string that defines how the pager would be normally rendered rendered. Uses same arguments as pager()
|
|
|
method, but returns a simple dictionary in form of:
|
|
|
{'current_page': {'attrs': {},
|
|
|
'href': 'http://example.org/foo/page=1',
|
|
|
'value': 1},
|
|
|
'first_page': {'attrs': {},
|
|
|
'href': 'http://example.org/foo/page=1',
|
|
|
'type': 'first_page',
|
|
|
'value': 1},
|
|
|
'last_page': {'attrs': {},
|
|
|
'href': 'http://example.org/foo/page=8',
|
|
|
'type': 'last_page',
|
|
|
'value': 8},
|
|
|
'next_page': {'attrs': {}, 'href': 'HREF', 'type': 'next_page', 'value': 2},
|
|
|
'previous_page': None,
|
|
|
'range_pages': [{'attrs': {},
|
|
|
'href': 'http://example.org/foo/page=1',
|
|
|
'type': 'current_page',
|
|
|
'value': 1},
|
|
|
....
|
|
|
{'attrs': {}, 'href': '', 'type': 'span', 'value': '..'}]}
|
|
|
|
|
|
|
|
|
The string can contain the following $-tokens that are substituted by the
|
|
|
string.Template module:
|
|
|
|
|
|
- $first_page: number of first reachable page
|
|
|
- $last_page: number of last reachable page
|
|
|
- $page: number of currently selected page
|
|
|
- $page_count: number of reachable pages
|
|
|
- $items_per_page: maximal number of items per page
|
|
|
- $first_item: index of first item on the current page
|
|
|
- $last_item: index of last item on the current page
|
|
|
- $item_count: total number of items
|
|
|
- $link_first: link to first page (unless this is first page)
|
|
|
- $link_last: link to last page (unless this is last page)
|
|
|
- $link_previous: link to previous page (unless this is first page)
|
|
|
- $link_next: link to next page (unless this is last page)
|
|
|
|
|
|
To render a range of pages the token '~3~' can be used. The
|
|
|
number sets the radius of pages around the current page.
|
|
|
Example for a range with radius 3:
|
|
|
|
|
|
'1 .. 5 6 7 [8] 9 10 11 .. 50'
|
|
|
|
|
|
Default: '~2~'
|
|
|
|
|
|
url
|
|
|
The URL that page links will point to. Make sure it contains the string
|
|
|
$page which will be replaced by the actual page number.
|
|
|
Must be given unless a url_maker is specified to __init__, in which
|
|
|
case this parameter is ignored.
|
|
|
|
|
|
symbol_first
|
|
|
String to be displayed as the text for the $link_first link above.
|
|
|
|
|
|
Default: '<<' (<<)
|
|
|
|
|
|
symbol_last
|
|
|
String to be displayed as the text for the $link_last link above.
|
|
|
|
|
|
Default: '>>' (>>)
|
|
|
|
|
|
symbol_previous
|
|
|
String to be displayed as the text for the $link_previous link above.
|
|
|
|
|
|
Default: '<' (<)
|
|
|
|
|
|
symbol_next
|
|
|
String to be displayed as the text for the $link_next link above.
|
|
|
|
|
|
Default: '>' (>)
|
|
|
|
|
|
separator:
|
|
|
String that is used to separate page links/numbers in the above range of pages.
|
|
|
|
|
|
Default: ' '
|
|
|
|
|
|
show_if_single_page:
|
|
|
if True the navigator will be shown even if there is only one page.
|
|
|
|
|
|
Default: False
|
|
|
|
|
|
link_attr (optional)
|
|
|
A dictionary of attributes that get added to A-HREF links pointing to other pages. Can
|
|
|
be used to define a CSS style or class to customize the look of links.
|
|
|
|
|
|
Example: { 'style':'border: 1px solid green' }
|
|
|
Example: { 'class':'pager_link' }
|
|
|
|
|
|
curpage_attr (optional)
|
|
|
A dictionary of attributes that get added to the current page number in the pager (which
|
|
|
is obviously not a link). If this dictionary is not empty then the elements will be
|
|
|
wrapped in a SPAN tag with the given attributes.
|
|
|
|
|
|
Example: { 'style':'border: 3px solid blue' }
|
|
|
Example: { 'class':'pager_curpage' }
|
|
|
|
|
|
dotdot_attr (optional)
|
|
|
A dictionary of attributes that get added to the '..' string in the pager (which is
|
|
|
obviously not a link). If this dictionary is not empty then the elements will be wrapped
|
|
|
in a SPAN tag with the given attributes.
|
|
|
|
|
|
Example: { 'style':'color: #808080' }
|
|
|
Example: { 'class':'pager_dotdot' }
|
|
|
"""
|
|
|
link_attr = link_attr or {}
|
|
|
curpage_attr = curpage_attr or {}
|
|
|
dotdot_attr = dotdot_attr or {}
|
|
|
self.curpage_attr = curpage_attr
|
|
|
self.separator = separator
|
|
|
self.link_attr = link_attr
|
|
|
self.dotdot_attr = dotdot_attr
|
|
|
self.url = url
|
|
|
|
|
|
regex_res = re.search(r"~(\d+)~", tmpl_format)
|
|
|
if regex_res:
|
|
|
radius = regex_res.group(1)
|
|
|
else:
|
|
|
radius = 2
|
|
|
|
|
|
self.radius = int(radius)
|
|
|
|
|
|
# Compute the first and last page number within the radius
|
|
|
# e.g. '1 .. 5 6 [7] 8 9 .. 12'
|
|
|
# -> leftmost_page = 5
|
|
|
# -> rightmost_page = 9
|
|
|
leftmost_page, rightmost_page = self._get_edges(
|
|
|
self.page, self.last_page, (self.radius * 2) + 1)
|
|
|
|
|
|
nav_items = {
|
|
|
"first_page": None,
|
|
|
"last_page": None,
|
|
|
"previous_page": None,
|
|
|
"next_page": None,
|
|
|
"current_page": None,
|
|
|
"radius": self.radius,
|
|
|
"range_pages": [],
|
|
|
}
|
|
|
|
|
|
if leftmost_page is None or rightmost_page is None:
|
|
|
return nav_items
|
|
|
|
|
|
nav_items["first_page"] = {
|
|
|
"type": "first_page",
|
|
|
"value": str(symbol_first),
|
|
|
"attrs": self.link_attr,
|
|
|
"number": self.first_page,
|
|
|
"href": self.url_maker(self.first_page),
|
|
|
}
|
|
|
|
|
|
# Insert dots if there are pages between the first page
|
|
|
# and the currently displayed page range
|
|
|
if leftmost_page - self.first_page > 1:
|
|
|
# Wrap in a SPAN tag if dotdot_attr is set
|
|
|
nav_items["range_pages"].append(
|
|
|
{
|
|
|
"type": "span",
|
|
|
"value": "..",
|
|
|
"attrs": self.dotdot_attr,
|
|
|
"href": "",
|
|
|
"number": None,
|
|
|
}
|
|
|
)
|
|
|
|
|
|
for this_page in range(leftmost_page, rightmost_page + 1):
|
|
|
# Highlight the current page number and do not use a link
|
|
|
if this_page == self.page:
|
|
|
# Wrap in a SPAN tag if curpage_attr is set
|
|
|
nav_items["range_pages"].append(
|
|
|
{
|
|
|
"type": "current_page",
|
|
|
"value": str(this_page),
|
|
|
"number": this_page,
|
|
|
"attrs": self.curpage_attr,
|
|
|
"href": self.url_maker(this_page),
|
|
|
}
|
|
|
)
|
|
|
nav_items["current_page"] = {
|
|
|
"value": this_page,
|
|
|
"attrs": self.curpage_attr,
|
|
|
"type": "current_page",
|
|
|
"href": self.url_maker(this_page),
|
|
|
}
|
|
|
# Otherwise create just a link to that page
|
|
|
else:
|
|
|
nav_items["range_pages"].append(
|
|
|
{
|
|
|
"type": "page",
|
|
|
"value": str(this_page),
|
|
|
"number": this_page,
|
|
|
"attrs": self.link_attr,
|
|
|
"href": self.url_maker(this_page),
|
|
|
}
|
|
|
)
|
|
|
|
|
|
# Insert dots if there are pages between the displayed
|
|
|
# page numbers and the end of the page range
|
|
|
if self.last_page - rightmost_page > 1:
|
|
|
# Wrap in a SPAN tag if dotdot_attr is set
|
|
|
nav_items["range_pages"].append(
|
|
|
{
|
|
|
"type": "span",
|
|
|
"value": "..",
|
|
|
"attrs": self.dotdot_attr,
|
|
|
"href": "",
|
|
|
"number": None,
|
|
|
}
|
|
|
)
|
|
|
|
|
|
# Create a link to the very last page (unless we are on the last
|
|
|
# page or there would be no need to insert '..' spacers)
|
|
|
nav_items["last_page"] = {
|
|
|
"type": "last_page",
|
|
|
"value": str(symbol_last),
|
|
|
"attrs": self.link_attr,
|
|
|
"href": self.url_maker(self.last_page),
|
|
|
"number": self.last_page,
|
|
|
}
|
|
|
|
|
|
nav_items["previous_page"] = {
|
|
|
"type": "previous_page",
|
|
|
"value": str(symbol_previous),
|
|
|
"attrs": self.link_attr,
|
|
|
"number": self.previous_page or self.first_page,
|
|
|
"href": self.url_maker(self.previous_page or self.first_page),
|
|
|
}
|
|
|
|
|
|
nav_items["next_page"] = {
|
|
|
"type": "next_page",
|
|
|
"value": str(symbol_next),
|
|
|
"attrs": self.link_attr,
|
|
|
"number": self.next_page or self.last_page,
|
|
|
"href": self.url_maker(self.next_page or self.last_page),
|
|
|
}
|
|
|
|
|
|
return nav_items
|
|
|
|
|
|
def _range(self, link_map, radius):
|
|
|
"""
|
|
|
Return range of linked pages to substitute placeholder in pattern
|
|
|
"""
|
|
|
# Compute the first and last page number within the radius
|
|
|
# e.g. '1 .. 5 6 [7] 8 9 .. 12'
|
|
|
# -> leftmost_page = 5
|
|
|
# -> rightmost_page = 9
|
|
|
leftmost_page, rightmost_page = self._get_edges(
|
|
|
self.page, self.last_page, (radius * 2) + 1)
|
|
|
|
|
|
nav_items = []
|
|
|
# Create a link to the first page (unless we are on the first page
|
|
|
# or there would be no need to insert '..' spacers)
|
|
|
if self.first_page and self.page != self.first_page and self.first_page < leftmost_page:
|
|
|
page = link_map["first_page"].copy()
|
|
|
page["value"] = str(page["number"])
|
|
|
nav_items.append(self.link_tag(page))
|
|
|
|
|
|
for item in link_map["range_pages"]:
|
|
|
nav_items.append(self.link_tag(item))
|
|
|
|
|
|
# Create a link to the very last page (unless we are on the last
|
|
|
# page or there would be no need to insert '..' spacers)
|
|
|
if self.last_page and self.page != self.last_page and rightmost_page < self.last_page:
|
|
|
page = link_map["last_page"].copy()
|
|
|
page["value"] = str(page["number"])
|
|
|
nav_items.append(self.link_tag(page))
|
|
|
|
|
|
return self.separator.join(nav_items)
|
|
|
|
|
|
def _default_url_maker(self, page_number):
|
|
|
if self.url is None:
|
|
|
raise Exception(
|
|
|
"You need to specify a 'url' parameter containing a '$page' placeholder."
|
|
|
)
|
|
|
|
|
|
if "$page" not in self.url:
|
|
|
raise Exception("The 'url' parameter must contain a '$page' placeholder.")
|
|
|
|
|
|
return self.url.replace("$page", str(page_number))
|
|
|
|
|
|
@staticmethod
|
|
|
def default_link_tag(item):
|
|
|
"""
|
|
|
Create an A-HREF tag that points to another page.
|
|
|
"""
|
|
|
text = item["value"]
|
|
|
target_url = item["href"]
|
|
|
|
|
|
if not item["href"] or item["type"] in ("span", "current_page"):
|
|
|
if item["attrs"]:
|
|
|
text = make_html_tag("span", **item["attrs"]) + text + "</span>"
|
|
|
return text
|
|
|
|
|
|
return make_html_tag("a", text=text, href=target_url, **item["attrs"])
|
|
|
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# Below is RhodeCode custom code
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# Copyright (C) 2010-2020 RhodeCode GmbH
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License, version 3
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# (only), as published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# This program is dual-licensed. If you wish to learn more about the
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# RhodeCode Enterprise Edition, including its added features, Support services,
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# and proprietary license terms, please see https://rhodecode.com/licenses/
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PAGE_FORMAT = '$link_previous ~3~ $link_next'
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class SqlalchemyOrmWrapper(object):
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"""Wrapper class to access elements of a collection."""
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def __init__(self, pager, collection):
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self.pager = pager
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self.collection = collection
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def __getitem__(self, key):
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if not isinstance(key, slice):
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raise ValueError('Pagination without a slice not supported')
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# Return a range of objects of an sqlalchemy.orm.query.Query object
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return self.collection[key]
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def __len__(self):
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# support empty types, without actually making a query.
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if self.collection is None or self.collection == []:
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return 0
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# Count the number of objects in an sqlalchemy.orm.query.Query object
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return self.collection.count()
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class CustomPager(_Page):
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@staticmethod
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def disabled_link_tag(item):
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"""
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Create an A-HREF tag that is disabled
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"""
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text = item['value']
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attrs = item['attrs'].copy()
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attrs['class'] = 'disabled ' + attrs['class']
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return make_html_tag('a', text=text, **attrs)
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def render(self):
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# Don't show navigator if there is no more than one page
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if self.page_count == 0:
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return ""
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self.link_tag = self.default_link_tag
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link_map = self.link_map(
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tmpl_format=PAGE_FORMAT, url=None,
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show_if_single_page=False, separator=' ',
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symbol_first='<<', symbol_last='>>',
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symbol_previous='<', symbol_next='>',
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link_attr={'class': 'pager_link'},
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curpage_attr={'class': 'pager_curpage'},
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dotdot_attr={'class': 'pager_dotdot'})
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links_markup = self._range(link_map, self.radius)
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link_first = (
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self.page > self.first_page and self.link_tag(link_map['first_page']) or ''
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)
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link_last = (
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self.page < self.last_page and self.link_tag(link_map['last_page']) or ''
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)
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link_previous = (
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self.previous_page and self.link_tag(link_map['previous_page'])
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or self.disabled_link_tag(link_map['previous_page'])
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)
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link_next = (
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self.next_page and self.link_tag(link_map['next_page'])
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or self.disabled_link_tag(link_map['next_page'])
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)
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# Interpolate '$' variables
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# Replace ~...~ in token tmpl_format by range of pages
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result = re.sub(r"~(\d+)~", links_markup, PAGE_FORMAT)
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result = Template(result).safe_substitute(
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{
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"links": links_markup,
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"first_page": self.first_page,
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"last_page": self.last_page,
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"page": self.page,
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"page_count": self.page_count,
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"items_per_page": self.items_per_page,
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"first_item": self.first_item,
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"last_item": self.last_item,
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"item_count": self.item_count,
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"link_first": link_first,
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"link_last": link_last,
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"link_previous": link_previous,
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"link_next": link_next,
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}
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)
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return literal(result)
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class Page(CustomPager):
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"""
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Custom pager to match rendering style with paginator
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"""
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def __init__(self, collection, page=1, items_per_page=20, item_count=None,
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url_maker=None, **kwargs):
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"""
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Special type of pager. We intercept collection to wrap it in our custom
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logic instead of using wrapper_class
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"""
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super(Page, self).__init__(collection=collection, page=page,
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items_per_page=items_per_page, item_count=item_count,
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wrapper_class=None, url_maker=url_maker, **kwargs)
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class SqlPage(CustomPager):
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"""
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Custom pager to match rendering style with paginator
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"""
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def __init__(self, collection, page=1, items_per_page=20, item_count=None,
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url_maker=None, **kwargs):
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"""
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Special type of pager. We intercept collection to wrap it in our custom
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logic instead of using wrapper_class
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"""
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collection = SqlalchemyOrmWrapper(self, collection)
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super(SqlPage, self).__init__(collection=collection, page=page,
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items_per_page=items_per_page, item_count=item_count,
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wrapper_class=None, url_maker=url_maker, **kwargs)
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class RepoCommitsWrapper(object):
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"""Wrapper class to access elements of a collection."""
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def __init__(self, pager, collection):
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self.pager = pager
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self.collection = collection
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def __getitem__(self, key):
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cur_page = self.pager.page
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items_per_page = self.pager.items_per_page
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first_item = max(0, (len(self.collection) - (cur_page * items_per_page)))
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last_item = ((len(self.collection) - 1) - items_per_page * (cur_page - 1))
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return reversed(list(self.collection[first_item:last_item + 1]))
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def __len__(self):
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return len(self.collection)
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class RepoPage(CustomPager):
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"""
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Create a "RepoPage" instance. special pager for paging repository
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"""
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def __init__(self, collection, page=1, items_per_page=20, item_count=None,
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url_maker=None, **kwargs):
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"""
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Special type of pager. We intercept collection to wrap it in our custom
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logic instead of using wrapper_class
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"""
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collection = RepoCommitsWrapper(self, collection)
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super(RepoPage, self).__init__(collection=collection, page=page,
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items_per_page=items_per_page, item_count=item_count,
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wrapper_class=None, url_maker=url_maker, **kwargs)
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