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code cosmetics: simplify importFromString a bit

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This commit is contained in:
tophf 2017-04-18 00:22:44 +03:00
parent a2faa9398a
commit 346245a847
1 changed files with 69 additions and 60 deletions
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37
backup/fileSaveLoad.js
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@ -51,7 +51,8 @@ function importFromString(jsonString) {
onBackgroundReady().then(() => importFromString(jsonString));
return;
}
const json = BG.tryJSONparse(jsonString) || []; // create object in background context
// create objects in background context
const json = BG.tryJSONparse(jsonString) || [];
if (typeof json.slice != 'function') {
json.length = 0;
}
@ -71,15 +72,29 @@ function importFromString(jsonString) {
const renderQueue = [];
const RENDER_NAP_TIME_MAX = 1000; // ms
const RENDER_QUEUE_MAX = 50; // number of styles
const SAVE_OPTIONS = {reason: 'import', notify: false};
return new Promise(proceed);
function proceed(resolve) {
while (index < json.length) {
const item = json[index++];
const info = analyze(item);
if (info) {
// using saveStyle directly since json was parsed in background page context
return BG.saveStyle(Object.assign(item, SAVE_OPTIONS))
.then(style => account({style, info, resolve}));
}
}
renderQueue.forEach(style => handleUpdate(style, {reason: 'import'}));
renderQueue.length = 0;
done(resolve);
}
function analyze(item) {
if (!item || !item.name || !item.name.trim() || typeof item != 'object'
|| (item.sections && typeof item.sections.slice != 'function')) {
stats.invalid.names.push(`#${index}: ${limitString(item && item.name || '')}`);
continue;
return;
}
item.name = item.name.trim();
const byId = BG.cachedStyles.byId.get(item.id);
@ -96,13 +111,12 @@ function importFromString(jsonString) {
if (metaEqual && codeEqual) {
stats.unchanged.names.push(oldStyle.name);
stats.unchanged.ids.push(oldStyle.id);
continue;
return;
}
// using saveStyle directly since json was parsed in background page context
BG.saveStyle(Object.assign(item, {
reason: 'import',
notify: false,
})).then(style => {
return {oldStyle, metaEqual, codeEqual};
}
function account({style, info, resolve}) {
renderQueue.push(style);
if (performance.now() - lastRenderTime > RENDER_NAP_TIME_MAX
|| renderQueue.length > RENDER_QUEUE_MAX) {
@ -112,6 +126,7 @@ function importFromString(jsonString) {
lastRenderTime = performance.now();
}
setTimeout(proceed, 0, resolve);
const {oldStyle, metaEqual, codeEqual} = info;
if (!oldStyle) {
stats.added.names.push(style.name);
stats.added.ids.push(style.id);
@ -129,12 +144,6 @@ function importFromString(jsonString) {
}
stats.metaOnly.names.push(reportNameChange(oldStyle, style));
stats.metaOnly.ids.push(style.id);
});
return;
}
renderQueue.forEach(style => handleUpdate(style, {reason: 'import'}));
renderQueue.length = 0;
done(resolve);
}
function done(resolve) {