Implement 'pages' counter #367
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- Spec: https://drafts.csswg.org/css-page/#page-based-counters - Note that the current implementation does not re-layout the pages but merely substitute the text contents generated by the 'pages' counter. It means that you need to make sure that dimension and position of a pseudo-element or a region in which 'pages' counter is rendered does not depend on the actual content of the counter. Such implementation is chosen in order to: - avoid performance degradation ('pages' counter is often used in all pages, so triggering re-layout of the pages make the total processing time twice), and - workaround a bug of page floats when re-layout of the pages is triggered.
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It means that you need to make sure that dimension and position of a pseudo-element or a region in which 'pages' counter is rendered does not depend on the actual content of the counter.
Such implementation is chosen in order to: