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pkg/gui/patch_exploring/focus.go
47 строк
2 KB
Stefan Haller
Fix scrolling hunk into view when selecting next hunk
07 июл 2025, 14:42
07 июл 2025, 14:42
6365528
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package patch_exploring func calculateOrigin(currentOrigin int, bufferHeight int, numLines int, firstLineIdx int, lastLineIdx int, selectedLineIdx int, mode selectMode) int { needToSeeIdx, wantToSeeIdx := getNeedAndWantLineIdx(firstLineIdx, lastLineIdx, selectedLineIdx, mode) return calculateNewOriginWithNeededAndWantedIdx(currentOrigin, bufferHeight, numLines, needToSeeIdx, wantToSeeIdx) } // we want to scroll our origin so that the index we need to see is in view // and the other index we want to see (e.g. the other side of a line range) // is as close to being in view as possible. func calculateNewOriginWithNeededAndWantedIdx(currentOrigin int, bufferHeight int, numLines int, needToSeeIdx int, wantToSeeIdx int) int { origin := currentOrigin if needToSeeIdx < currentOrigin || needToSeeIdx >= currentOrigin+bufferHeight { origin = max(min(needToSeeIdx-bufferHeight/2, numLines-bufferHeight), 0) } bottom := origin + bufferHeight if wantToSeeIdx < origin { requiredChange := origin - wantToSeeIdx allowedChange := bottom - needToSeeIdx return origin - min(requiredChange, allowedChange) } else if wantToSeeIdx >= bottom { requiredChange := wantToSeeIdx + 1 - bottom allowedChange := needToSeeIdx - origin return origin + min(requiredChange, allowedChange) } return origin } func getNeedAndWantLineIdx(firstLineIdx int, lastLineIdx int, selectedLineIdx int, mode selectMode) (int, int) { switch mode { case LINE: return selectedLineIdx, selectedLineIdx case RANGE: if selectedLineIdx == firstLineIdx { return firstLineIdx, lastLineIdx } return lastLineIdx, firstLineIdx case HUNK: return firstLineIdx, lastLineIdx default: // we should never land here panic("unknown mode") } }