One note about this solution: it includes the apz callback transform for the root scroll frame of the root content document, but no other apz callback transform that might be on an ancestor of the select element.
Differential Revision: https://phabricator.services.mozilla.com/D78026
This adjusts the position at which the drag images appear when doing drag
actions, so that they appear where you would expect when APZ zoom is applied.
There doesn't seem to be a good way to test this, but I did a bunch of manual
testing, with all the possible expansions of this sentence:
Dragging {a small image,a large image,some text} in {an iframe,the root
content document}, with {,no }zooming applied.
In all cases, the drag image/text should appear such that the part under the
cursor is the same as what was under the cursor on the original rendering of
the page.
Differential Revision: https://phabricator.services.mozilla.com/D77436
We will be applying and unapplying this transform in many places, and
thinking about those operations as "applying the callback transform" and
"unapplying the callback transform" is not very intuitive, especially since
applying the callback transform involves *un*applying the resolution.
Rather, going forward we will use the terminology "visual coordinates"
and "layout coordinates" and use this function to convert back and forth
between them.
ApplyCallbackTransform() is not renamed here because subsequent patches will
transition its callers to use GetVisualToLayoutTransform() and
ApplyCallbackTransform() will be removed.
Differential Revision: https://phabricator.services.mozilla.com/D68297
This function (and helper functions that wrap it) will be used extensively
throughout layout code, so keeping it in APZCCallbackHelper seems awkward.
nsLayoutUtils would also be a reasonable place but has the downside that
adding a new function to it triggers recompiling the world.
Differential Revision: https://phabricator.services.mozilla.com/D68296
We will be applying and unapplying this transform in many places, and
thinking about those operations as "applying the callback transform" and
"unapplying the callback transform" is not very intuitive, especially since
applying the callback transform involves *un*applying the resolution.
Rather, going forward we will use the terminology "visual coordinates"
and "layout coordinates" and use this function to convert back and forth
between them.
ApplyCallbackTransform() is not renamed here because subsequent patches will
transition its callers to use GetVisualToLayoutTransform() and
ApplyCallbackTransform() will be removed.
Differential Revision: https://phabricator.services.mozilla.com/D68297
This function (and helper functions that wrap it) will be used extensively
throughout layout code, so keeping it in APZCCallbackHelper seems awkward.
nsLayoutUtils would also be a reasonable place but has the downside that
adding a new function to it triggers recompiling the world.
Differential Revision: https://phabricator.services.mozilla.com/D68296
Timothy Nikkel
Kartikaya Gupta
Botond Ballo
Csoregi Natalia