QTime is quite inefficient and getFreeMemory sometimes gets called quite
frequently. I found that upwards of 10% of CPU time was being spent
inside of QTime in some cases. Besides being the recommended thing for
this use case, QDeadlineTimer is a lot more efficient.
It turns out that there were two issues at play here: rounding errors
meant that pixmaps were almost never the same size as pagePainter
thought the tiles should be, and the tile-is-the-size-it-should-be code
path was broken (but only hit in rare cases, seemingly at random).
To help with rounding errors in the future, I added a geometryF function
to NormalizedRect that returns a QRectF. In general,
device-independent-pixel points/rects should be floating point, and
device-pixel rects should be integer.
This represents the newly entered data for each keystroke. This is often a single added character, but for cases like pasting text it can be more complex.
The PDF API reference doesn't specify any algorithm to use.
The algorithm used here works by iterating through both strings from the start until the first different character is encountered. Then the rest of the new text is considered the difference.
This doesn't produce the theoretically optimal/minimal diff, but seems to work well enough for practical application.
When text is removed the diff is empty
Viewport isn't centered on annotations when translating/resizing.
This is best seen if the page is zoomed in and annotation is translated so that
several viewport transitions had happened.
Using undo after translation will expose error.
Function moveViewportIfBoundingRectNotFullyVisible centers viewport based on
translated/resized annotation's bounding rectangle.
For that reason functions translateBoundingRectangle/adjustBoundingRectangle need
to return the same bounding rectangle as annotation's translate/adjust functions.
The link can be percent encoded so try it like that if not found in the
normal way, also if the text overflows the page, it's in the next page
BUGS: 458289
Better enforce them now, so that the work to port doesn't increase over
time
Not a super fan of this for regular applications, but oh well the ship
has sailed
QLinkedList is gone from Qt6
The 1:1 port is std::list but we don't need iterator stability on
removal/insertion so just port to QList (one case to std::vector since
QList needs a copy constructor)
QLinkedList is deprecated in later Qt5 and gone in Qt6
The 1:1 port is std::list but in this cases all we ever do
is create the lists, push back to them, and pass then around
to be read, for that a QList is more than enough
Make it more similar to how we handle the format event.
We pass the new value to processKeystrokeAction, that calls the script
and sets the new value for the form object according to the result. If
needed the widget is refreshed to reflect the new text