jyapayne/karax
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optimized the new diff algorihtm

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This commit is contained in:
Andreas Rumpf 2017-06-24 08:23:22 +02:00
commit 09a5e1c34e
1 changed files with 17 additions and 15 deletions
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32
src/karax.nim
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@ -205,26 +205,30 @@ type
pkReplace, pkRemove, pkAppend, pkInsertBefore
Patch = object
k: PatchKind
parent, current, n: Node
parent, current: Node
n: VNode
proc addPatch(patches: var seq[Patch]; k: PatchKind; parent, current, n: Node) =
proc addPatch(patches: var seq[Patch]; k: PatchKind; parent, current: Node;
n: VNode) =
patches.add(Patch(k: k, parent: parent, current: current, n: n))
proc apply(patches: seq[Patch]; kxi: KaraxInstance) =
for p in patches:
case p.k
of pkReplace:
let nn = vnodeToDom(p.n, kxi)
if p.parent == nil:
replaceById(kxi.rootId, p.n)
replaceById(kxi.rootId, nn)
else:
if p.n != p.current:
p.parent.replaceChild(p.n, p.current)
p.parent.replaceChild(nn, p.current)
of pkRemove:
p.parent.removeChild(p.current)
of pkAppend:
p.parent.appendChild(p.n)
let nn = vnodeToDom(p.n, kxi)
p.parent.appendChild(nn)
of pkInsertBefore:
p.parent.insertBefore(p.n, p.current)
let nn = vnodeToDom(p.n, kxi)
p.parent.insertBefore(nn, p.current)
proc diff(parent, current: Node; newNode, oldNode: VNode; patches: var seq[Patch];
kxi: KaraxInstance): EqResult =
@ -248,7 +252,8 @@ proc diff(parent, current: Node; newNode, oldNode: VNode; patches: var seq[Patch
assert current.childNodes[j] != nil, $info
assert oldNode.len == current.len
let r = if oldNode.kind in {VNodeKind.component, VNodeKind.vthunk, VNodeKind.dthunk}:
let r = if oldNode.kind == VNodeKind.component or oldNode.kind == VNodeKind.vthunk or
oldNode.kind == VNodeKind.dthunk:
diff(parent, current, a[i], b[j], patches, kxi)
else:
diff(current, current.childNodes[j], a[i], b[j], patches, kxi)
@ -287,13 +292,12 @@ proc diff(parent, current: Node; newNode, oldNode: VNode; patches: var seq[Patch
if oldPos + 1 == oldLength:
for i in pos..newPos:
patches.addPatch(pkAppend, current, nil, vnodeToDom(newNode[i], kxi))
patches.addPatch(pkAppend, current, nil, newNode[i])
result = different
else:
let before = current.childNodes[oldPos + 1]
for i in pos..newPos:
patches.addPatch(pkInsertBefore, current, before,
vnodeToDom(newNode[i], kxi))
patches.addPatch(pkInsertBefore, current, before, newNode[i])
result = different
# XXX call 'attach' here?
for i in pos..oldPos:
@ -312,8 +316,7 @@ proc diff(parent, current: Node; newNode, oldNode: VNode; patches: var seq[Patch
x.updatedImpl(x)
if oldExpanded == nil:
detach(oldNode)
let n = vnodeToDom(x.expanded, kxi)
patches.addPatch(pkReplace, parent, current, n)
patches.addPatch(pkReplace, parent, current, x.expanded)
else:
let res = diff(parent, current, x.expanded, oldExpanded, patches, kxi)
if res != different:
@ -323,8 +326,7 @@ proc diff(parent, current: Node; newNode, oldNode: VNode; patches: var seq[Patch
assert x.expanded.dom != nil, "expanded.dom is nil"
of different:
detach(oldNode)
let n = vnodeToDom(newNode, kxi)
patches.addPatch(pkReplace, parent, current, n)
patches.addPatch(pkReplace, parent, current, newNode)
proc dodraw(kxi: KaraxInstance) =
if kxi.renderer.isNil: return