There are three reasons why scrolling happens (first two cases of scrolling are actually due to
viewport transition that is triggered by annotation being traslated/created):
1. VisiblePageRect are NormalizedRect and should be represented by four values in [0, 1] interval.
Due to rounding errors caused by using QRect, they only reach the [0, 0.999] interval.
That means that right and bottom edge of the page are never visible so if annotation
is translated along the right/bottom edge viewport transition occurs (fixed in
PageView::slotRequestVisiblePixmaps)
2. For freehand line there are some constants (dX, dY) that make a line to be drawn outside
the page borders causing viewport transition. Removing these constants solves the problem (fixed
in SmoothPathEngine::event)
3. Browse mode is activated as soon as the cursor is moved outside the viewport.
Instead, we should forward the move event to the annotation which than can ignore the event (fixed
in PageView::mouseMoveEvent)
BUG: 436742
Currently, scrolling through a document using the touchpad is quite slow compared to scrolling through the standard Qt controls. This MR increases the speed of scrolling with the touchpad by removing the "magic" divider.
CCBUG: 455014
The mouse cursor wrap feature while drag-scrolling can be undesirable in some
cases; for example it can be annoying to have the cursor jump accidentally to
the distant edge of a big screen. Now users can disable this feature if they
prefer.
BUG: 421040
FIXED-IN: 22.12
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
Nikola Nikolic
l10n daemon script
Eugene Popov
Albert Astals Cid
Ilya Pominov
Alexander Volkov
Jonathan Esk-Riddell
Nicolas Fella
Heiko Becker
Eduardo Cruz