* 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.
* lisp/pixel-scroll.el (pixel-scroll-precision-scroll-down): Get
rid of big motion loop.
(pixel-scroll-precision-scroll-up): Stop subtracting height of
window lines.
This fixes most of the problem, but with a large image the
vscroll can sometimes jump about, which has to be fixed.
* lisp/pixel-scroll.el (pixel-scroll-precision-up): Handle
vscrolling large images in the first unseen line.
* lisp/pixel-scroll.el (pixel-point-at-unseen-line): Rewrite
to use `pixel-point-and-height-at-unseen-line'.
(pixel-point-and-height-at-unseen-line): New function.
(pixel-scroll-precision-scroll-up): Use existing logic
to determine unseen line position.
* etc/NEWS: Update NEWS entry for 'pixel-scroll-precision-mode'
* lisp/better-pixel-scroll.el: Remove file.
* src/pixel-scroll.el (x-coalesce-scroll-events): New variable
declaration.
(pixel-scroll-precision-mode-map): New variable.
(pixel-scroll-precision-scroll-down):
(pixel-scroll-precision-scroll-up):
(pixel-scroll-precision): New functions.
(pixel-scroll-precision-mode): New minor mode.
