Feature request: ZoomAndPan API

I had prepared this around four days ago.
And have been waiting a cursory check on it's reasoning.
But the check went into someone's 2busy basket!
I see Jonathan and Erik discussing the region.
So I now post it.

-----------------------------------------
I maybe unread of all svg docs.
Though I cannot find a reference to zoom state detection.
There is an excellent discussion on SO:
<http://stackoverflow.com/questions/1713771/how-to-detect-page-zoom-level-in-all-modern-browsers>

Feature request: ZoomAndPan API.
In some webkit implementations zooming beyond the (implied) zoom max
results in messy redraws and uncertain recentering.
Currently I find islands of zoom stability with some browsers.

Known (starter) use case:
With a zoom level known, content visibility can be adjusted accordingly.

Complication:
The maximum zoom level of browsers differ.
So content levels cannot be planned according to level.
There is the adjacent developer interest of detecting pan state.

ClarificationQ:
The zoom and pan are the user actions, the scale and scroll the svg result?

Being that SVG promotes scalability, this omission appears as a surprise to
many newcomers.

Refs:
 https://github.com/ariutta/svg-pan-zoom
 google seach
<https://www.w3.org/Search/Mail/Public/search?type-index=www-svg&index-type=t&keywords=zoom&search=Search&resultsperpage=20&sortby=date&page=1>

-- 
MarkT
(+61 4) 0679 5734 ::'They promised us flying cars. Instead we got 140
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