* lisp/pixel-scroll.el (pixel-scroll-start-momentum): Bump GC
cons threshold temporarily. This leads to a very noticable
improvement to animation speed.
* doc/lispref/windows.texi (Vertical Scrolling): Document new
`preserve-vscroll-p' parameter of `set-window-vscroll'.
* etc/NEWS: Announce new parameter.
* lisp/pixel-scroll.el (pixel-scroll-precision-scroll-down-page)
(pixel-scroll-precision-scroll-up-page): Use that parameter when
setting the vscroll.
* src/window.c (window_scroll_pixel_based, Fset_window_vscroll):
Adjust for new parameter.
* src/window.h (struct window): New flag `preserve_vscroll_p'.
* src/xdisp.c (redisplay_window): Preserve the vscroll inside
force_start on frozen windows with that flag set. (bug#55312)
* lisp/pixel-scroll.el
(pixel-scroll-precision-interpolate-mice): New
user option.
(pixel-scroll-precision): If the class of the last event device
is `mouse', interpolate the next scroll.
* lisp/pixel-scroll.el (pixel-scroll-interpolate-down)
(pixel-scroll-interpolate-up): Use `cua-scroll-up' and
`cua-scroll-down' to scroll if
`pixel-scroll-precision-interpolate-page' is off. (bug#54696)
* lisp/pixel-scroll.el (pixel-scroll-precision-mode-map): Bind
some more events.
(pixel-scroll-precision):
(pixel-scroll-start-momentum): If window is a frame, use its
selected window.
* lisp/pixel-scroll.el (pixel-scroll-precision-interpolate): New
parameter `old-window'.
(pixel-scroll-precision): Pass originally selected window to the
interpolation function.
* lisp/pixel-scroll.el (pixel-scroll-kinetic-state): New
argument `window'.
(pixel-scroll-start-momentum): Don't select the window under
the event when calculating velocity or redisplaying.
* lisp/pixel-scroll.el
(pixel-scroll-precision-initial-velocity-factor): Fix
calculation of last timestamp.
(pixel-scroll-precision):
(pixel-scroll-kinetic-state):
(pixel-scroll-accumulate-velocity):
(pixel-scroll-start-momentum):
(pixel-scroll-calculate-velocity): Increase default ring size
to 30.
* lisp/pixel-scroll.el (pixel-scroll-precision-mode-map): Define
new commands.
(pixel-scroll-precision-interpolate-page): New user option.
(pixel-scroll-interpolate-down):
(pixel-scroll-interpolate-up): New functions.
* doc/lispref/display.texi (Size of Displayed Text): Announce
new meaning of `from'.
* etc/NEWS: Announce changes.
* lisp/pixel-scroll.el (pixel-scroll-precision-scroll-up-page):
Use new feature.
* src/xdisp.c (window_text_pixel_size): Understand a special
format of `from' that specifies the amount of pixels above or
below a position.
(Fwindow_text_pixel_size): Update doc string.
* lisp/pixel-scroll.el (pixel-point-and-height-at-unseen-line):
Subtract line height of window start when it doesn't appear
at the 0th pixel of the line.
* lisp/pixel-scroll.el
(pixel-point-and-height-at-unseen-line): Use
`window-text-pixel-size'.
(pixel-scroll-precision-scroll-up-page): Use delta as vscroll
directly.
* lisp/pixel-scroll.el
(pixel-scroll-precision-interpolation-total-time)
(pixel-scroll-precision-interpolation-factor): New user
options.
(pixel-scroll-precision-interpolate): Use these new options.
(pixel-scroll-precision-mode): Set
`make-cursor-line-fully-visible' to nil.
* lisp/pixel-scroll.el
(pixel-scroll-precision-large-scroll-height): New user option.
(pixel-scroll-precision-interpolate): New function.
(pixel-scroll-precision): Interpolate scrolls under some
circumstances.
* lisp/pixel-scroll.el
(pixel-scroll-precision-scroll-down-page)
(pixel-scroll-precision-scroll-up-page): Use beginning of visual
line as window start if hscrolled.
(pixel-scroll-precision): Don't delegate to mwheel-scroll if
window is hscrolled.
* lisp/pixel-scroll.el (pixel-scroll-precision-scroll-down-page)
(pixel-scroll-precision-scroll-up-page): Use `max-height' that
is slightly less than the text height of the window.
* lisp/pixel-scroll.el
(pixel-scroll-precision-scroll-down-page):
(pixel-scroll-precision-scroll-up-page): New functions.
(pixel-scroll-precision-scroll-up)
(pixel-scroll-precision-scroll-down): Make it safe to scroll
by deltas larger than the current window.
* lisp/pixel-scroll.el
(pixel-scroll-precision-momentum-factor): Remove option.
(pixel-scroll-precision-initial-velocity-factor)
(pixel-scroll-precision-momentum-min-velocity): New user
options.
(pixel-scroll-accumulate-velocity): Clear velocity ring
if sign is different.
(pixel-scroll-calculate-velocity): Use current time.
(pixel-scroll-start-momentum): Use better algorithm.
* lisp/pixel-scroll.el (pixel-scroll-precision-momentum-tick):
Set default value to 0.01.
(pixel-scroll-precision-momentum-seconds): New user option.
(pixel-scroll-start-momentum): Improvements to momentum
algorithm.
* lisp/pixel-scroll.el (pixel-scroll-precision-momentum-tick):
(pixel-scroll-precision-momentum-factor): New user options.
(pixel-scroll-kinetic-state, pixel-scroll-accumulate-velocity):
Set scroll momentum ring size to 10.
(pixel-scroll-start-momentum): Improve algorithm.
The algorithm used to scroll the display kinetically is very
simple and needs improvement. Someone should work on that
eventually.
* lisp/pixel-scroll.el (pixel-scroll-precision-use-momentum):
New user option.
(pixel-scroll-precision-mode-map): Add
`pixel-scroll-start-momentum'.
(pixel-scroll-kinetic-state):
(pixel-scroll-accumulate-velocity):
(pixel-scroll-calculate-velocity): New functions.
(pixel-scroll-start-momentum): New command.
* src/xterm.c (handle_one_xevent): Fix touch-end event
generation.
