perf[tagsView]: refactor the moveToTarget function (#1195)

* fix[tagsView]:fixed visited view move to currentTag

* edit the scroll regular friendly

* tweak
This commit is contained in:
frank10000 2018-10-16 10:56:01 +08:00 committed by 花裤衩
parent 0f6d830c19
commit 96bda5515c
2 changed files with 47 additions and 11 deletions

View File

@ -5,7 +5,7 @@
</template> </template>
<script> <script>
const padding = 15 // tag's padding const tagAndTagSpacing = 4 // tagAndTagSpacing
export default { export default {
name: 'ScrollPane', name: 'ScrollPane',
@ -20,18 +20,54 @@ export default {
const $scrollWrapper = this.$refs.scrollContainer.$refs.wrap const $scrollWrapper = this.$refs.scrollContainer.$refs.wrap
$scrollWrapper.scrollLeft = $scrollWrapper.scrollLeft + eventDelta / 4 $scrollWrapper.scrollLeft = $scrollWrapper.scrollLeft + eventDelta / 4
}, },
moveToTarget($target) { moveToTarget(currentTag) {
const $container = this.$refs.scrollContainer.$el const $container = this.$refs.scrollContainer.$el
const $containerWidth = $container.offsetWidth const $containerWidth = $container.offsetWidth
const $scrollWrapper = this.$refs.scrollContainer.$refs.wrap const $scrollWrapper = this.$refs.scrollContainer.$refs.wrap
const $targetLeft = $target.offsetLeft const tagList = this.$parent.$refs.tag
const $targetWidth = $target.offsetWidth
if ($targetLeft > $containerWidth) { let firstTag = null
// tag in the right let lastTag = null
$scrollWrapper.scrollLeft = $targetLeft - $containerWidth + $targetWidth + padding let prevTag = null
let nextTag = null
// find first tag and last tag
if (tagList.length > 0) {
firstTag = tagList[0]
lastTag = tagList[tagList.length - 1]
}
// find preTag and nextTag
for (let i = 0; i < tagList.length; i++) {
if (tagList[i] === currentTag) {
if (i === 0) {
nextTag = tagList[i].length > 1 && tagList[i + 1]
} else if (i === tagList.length - 1) {
prevTag = tagList[i].length > 1 && tagList[i - 1]
} else {
prevTag = tagList[i - 1]
nextTag = tagList[i + 1]
}
break
}
}
if (firstTag === currentTag) {
$scrollWrapper.scrollLeft = 0
} else if (lastTag === currentTag) {
$scrollWrapper.scrollLeft = $scrollWrapper.scrollWidth - $containerWidth
} else { } else {
// tag in the left // the tag's offsetLeft after of nextTag
$scrollWrapper.scrollLeft = $targetLeft - padding const afterNextTagOffsetLeft = nextTag.$el.offsetLeft + nextTag.$el.offsetWidth + tagAndTagSpacing
// the tag's offsetLeft before of prevTag
const beforePrevTagOffsetLeft = prevTag.$el.offsetLeft - tagAndTagSpacing
if (afterNextTagOffsetLeft > $scrollWrapper.scrollLeft + $containerWidth) {
$scrollWrapper.scrollLeft = afterNextTagOffsetLeft - $containerWidth
} else if (beforePrevTagOffsetLeft < $scrollWrapper.scrollLeft) {
$scrollWrapper.scrollLeft = beforePrevTagOffsetLeft
}
} }
} }
} }

View File

@ -75,8 +75,8 @@ export default {
const tags = this.$refs.tag const tags = this.$refs.tag
this.$nextTick(() => { this.$nextTick(() => {
for (const tag of tags) { for (const tag of tags) {
if (tag.to.path === this.$route.path) { if (tag.to === this.$route.fullPath) {
this.$refs.scrollPane.moveToTarget(tag.$el) this.$refs.scrollPane.moveToTarget(tag)
// when query is different then update // when query is different then update
if (tag.to.fullPath !== this.$route.fullPath) { if (tag.to.fullPath !== this.$route.fullPath) {