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f6f2a52dee
Original commit message of the gocui change:
This fixes View.Size, Width and Height to be the correct (outer) size of a view
including its frame, and InnerSize/InnerWidth/InnerHeight to be the usable
client area exluding the frame. Previously, Size was actually the InnerSize (and
a lot of client code used it as such, so these need to be changed to InnerSize).
InnerSize, on the other hand, was *one* less than Size (not two, as you would
have expected), and in many cases this was made up for at call sites by adding 1
(e.g. in calcRealScrollbarStartEnd, parseInput, and many other places in the
lazygit code).
There are still some weird things left that I didn't address here:
- a view's lower-right coordinates (x1/y1) are one less than you would expect.
For example, a view with a 2x2 client area like this:
╭──╮
│ab│
│cd│
╰──╯
in the top-left corner of the screen (x0 and y0 both zero) has x1/xy at 3, not
4 as would be more natural.
- a view without a frame has its coordinates extended by 1 on all sides; to
illustrate, the same 2x2 view as before but without a frame, sitting in the
top-left corder of the screen, has coordinates x0=-1, y0=-1, x1=2, y1=2. This
is highly confusing and unexpected.
I left these as they are because they would be even more of a breaking change,
and also because they don't have quite as much of an impact on general app code.
50 lines
1.7 KiB
Go
50 lines
1.7 KiB
Go
package patch_exploring
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func calculateOrigin(currentOrigin int, bufferHeight int, numLines int, firstLineIdx int, lastLineIdx int, selectedLineIdx int, mode selectMode) int {
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needToSeeIdx, wantToSeeIdx := getNeedAndWantLineIdx(firstLineIdx, lastLineIdx, selectedLineIdx, mode)
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return calculateNewOriginWithNeededAndWantedIdx(currentOrigin, bufferHeight, numLines, needToSeeIdx, wantToSeeIdx)
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}
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// we want to scroll our origin so that the index we need to see is in view
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// and the other index we want to see (e.g. the other side of a line range)
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// is as close to being in view as possible.
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func calculateNewOriginWithNeededAndWantedIdx(currentOrigin int, bufferHeight int, numLines int, needToSeeIdx int, wantToSeeIdx int) int {
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origin := currentOrigin
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if needToSeeIdx < currentOrigin || needToSeeIdx >= currentOrigin+bufferHeight {
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origin = max(min(needToSeeIdx-bufferHeight/2, numLines-bufferHeight), 0)
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}
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bottom := origin + bufferHeight
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if wantToSeeIdx < origin {
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requiredChange := origin - wantToSeeIdx
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allowedChange := bottom - needToSeeIdx
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return origin - min(requiredChange, allowedChange)
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} else if wantToSeeIdx >= bottom {
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requiredChange := wantToSeeIdx - bottom
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allowedChange := needToSeeIdx - origin
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return origin + min(requiredChange, allowedChange)
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} else {
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return origin
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}
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}
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func getNeedAndWantLineIdx(firstLineIdx int, lastLineIdx int, selectedLineIdx int, mode selectMode) (int, int) {
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switch mode {
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case LINE:
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return selectedLineIdx, selectedLineIdx
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case RANGE:
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if selectedLineIdx == firstLineIdx {
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return firstLineIdx, lastLineIdx
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} else {
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return lastLineIdx, firstLineIdx
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}
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case HUNK:
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return firstLineIdx, lastLineIdx
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default:
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// we should never land here
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panic("unknown mode")
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}
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}
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