[Webkit-unassigned] [Bug 213603] iOS pageZoom API confusing usage

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Thu Jun 25 09:41:37 PDT 2020


https://bugs.webkit.org/show_bug.cgi?id=213603

--- Comment #1 from Wenson Hsieh <wenson_hsieh at apple.com> ---
Safari's -/+ feature actually uses the SPI `_viewScale`, which actually changes the viewport's minimum layout size used when laying out the page (and then rescales the page to fit the true device width). This technique is intended to preserve page layout at different zoom levels.

It looks like the `pageZoom` API plumbs through `Frame::setPageZoomFactor`, which seems to behave more like CSS zoom.

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