Comments (2)
from anu.
import {
options,
clearArray
} from "./util";
import {
Refs
} from "./Refs";
/*
function callUpdate(updater, instance) {
Refs.clearRefs();
if (updater._lifeStage === 2) {
updater._didUpdate = true;
instance._didUpdate();
updater._lifeStage = 1;
updater._hydrating = false;
if (!updater._renderInNextCycle) {
updater._didUpdate = false;
}
}
updater._ref();
}*/
export function drainQueue(queue) {
options.beforePatch();
//先执行所有refs方法(从上到下)
Refs.clearRefs();
//再执行所有mount/update钩子(从下到上)
let i = 0;
while(i < queue.length){//queue可能中途加入新元素, 因此不能直接使用queue.forEach(fn)
let updater = queue[i];
i++;
Refs.clearRefs();
updater._didUpdate = updater._lifeStage === 2;
updater._didHook();
updater._lifeStage = 1;
updater._hydrating = false;
if (!updater._renderInNextCycle) {
updater._didUpdate = false;
}
updater._ref();
/*
if (!updater._lifeStage) {
Refs.clearRefs();
updater._didHook();
updater._lifeStage = 1;
updater._hydrating = false;
updater._ref();
} else {
callUpdate(updater, instance);
}*/
//如果组件在componentDidMount中调用setState
if (updater._renderInNextCycle) {
options.refreshComponent(updater, queue);
// callUpdate(updater, instance);
}
}
//再执行所有setState/forceUpdate回调,根据从下到上的顺序执行
queue.sort(mountSorter).forEach(function(updater){
clearArray(updater._pendingCallbacks).forEach(function(fn) {
fn.call(updater._instance);
});
});
queue.length = 0;
options.afterPatch();
}
var dirtyComponents = [];
function mountSorter(u1, u2) {//按文档顺序执行
return u1._mountIndex - u2._mountIndex;
}
options.flushUpdaters = function(queue) {
if (!queue) {
queue = dirtyComponents;
if(queue.length) {
queue.sort(mountSorter);
}
}
drainQueue(queue);
};
options.enqueueUpdater = function(updater) {
if (dirtyComponents.indexOf(updater) == -1) {
dirtyComponents.push(updater);
}
};
from anu.
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from anu.