pastilhasandClaude Opus 5 5ba89ae74d desktop: restore scaleViewport — disabling it doubled every pointer coordinate
Reverts the scaleViewport=false half of 69c750d. That change was wrong and it caused a worse bug than
the one it was aimed at.

noVNC maps a click as (clientX - canvasRect.left) / display._scale. autoscale(), which only runs when
scaleViewport is enabled, sets the canvas's displayed size and _scale in the same call, so the two are
consistent by construction. With scaleViewport off, _scale is pinned at 1 while the canvas continues to
be displayed at some other size and nothing reconciles them.

Measured on the owner's session against a 1109x715 desktop: pointing a quarter of the way across
registered at x=575 (51%), and pointing at the middle saturated at x=1108, the right-hand edge. A clean
factor of two in both axes. Clicks near the right and bottom edges still appeared to work, because
doubling an already-large coordinate clamps back onto the edge it was aimed at — which is why the
panel clock and the dock stayed clickable while the middle of the screen did not.

My reasoning for the original change — that resizeSession and scaleViewport are alternatives — was
simply wrong. They are complementary: resize matches the session to the container, scaling covers the
interval before the server honours it, and scaling is also what keeps the coordinate maths honest.

showDotCursor stays: the invisible pointer was a real and separate defect.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
2026-08-01 23:20:36 +00:00
2026-02-16 19:34:35 +00:00
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