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introduced mutex to avoid conflicts during tab closing

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zadam
2022-02-09 21:21:17 +01:00
parent 1dfde76b95
commit d6016f9b81
2 changed files with 67 additions and 32 deletions
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71
src/public/app/services/tab_manager.js
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@@ -7,11 +7,14 @@ import treeService from "./tree.js";
import utils from "./utils.js";
import NoteContext from "./note_context.js";
import appContext from "./app_context.js";
import Mutex from "../utils/mutex.js";
export default class TabManager extends Component {
constructor() {
super();
this.mutex = new Mutex();
this.activeNtxId = null;
// elements are arrays of note contexts for each tab (one main context + subcontexts [splits])
@@ -292,51 +295,55 @@ export default class TabManager extends Component {
}
async removeNoteContext(ntxId) {
const noteContextToRemove = this.getNoteContextById(ntxId);
// removing note context is async process which can take some time, if users presses CTRL-W quickly, two
// close events could interleave which would then lead to attempting to activate already removed context.
await this.mutex.runExclusively(async () => {
const noteContextToRemove = this.getNoteContextById(ntxId);
if (noteContextToRemove.isMainContext()) {
// forbid removing last main note context
// this was previously allowed (was replaced with empty tab) but this proved to be prone to race conditions
const mainNoteContexts = this.getNoteContexts().filter(nc => nc.isMainContext());
if (noteContextToRemove.isMainContext()) {
// forbid removing last main note context
// this was previously allowed (was replaced with empty tab) but this proved to be prone to race conditions
const mainNoteContexts = this.getNoteContexts().filter(nc => nc.isMainContext());
if (mainNoteContexts.length === 1) {
mainNoteContexts[0].setEmpty();
return;
if (mainNoteContexts.length === 1) {
mainNoteContexts[0].setEmpty();
return;
}
}
}
// close dangling autocompletes after closing the tab
$(".aa-input").autocomplete("close");
// close dangling autocompletes after closing the tab
$(".aa-input").autocomplete("close");
const noteContextsToRemove = noteContextToRemove.getSubContexts();
const ntxIdsToRemove = noteContextsToRemove.map(nc => nc.ntxId);
const noteContextsToRemove = noteContextToRemove.getSubContexts();
const ntxIdsToRemove = noteContextsToRemove.map(nc => nc.ntxId);
await this.triggerEvent('beforeTabRemove', { ntxIds: ntxIdsToRemove });
await this.triggerEvent('beforeTabRemove', { ntxIds: ntxIdsToRemove });
if (!noteContextToRemove.isMainContext()) {
await this.activateNoteContext(noteContextToRemove.getMainContext().ntxId);
}
else if (this.mainNoteContexts.length <= 1) {
await this.openAndActivateEmptyTab();
}
else if (ntxIdsToRemove.includes(this.activeNtxId)) {
const idx = this.mainNoteContexts.findIndex(nc => nc.ntxId === noteContextToRemove.ntxId);
if (idx === this.mainNoteContexts.length - 1) {
await this.activatePreviousTabCommand();
if (!noteContextToRemove.isMainContext()) {
await this.activateNoteContext(noteContextToRemove.getMainContext().ntxId);
}
else {
await this.activateNextTabCommand();
else if (this.mainNoteContexts.length <= 1) {
await this.openAndActivateEmptyTab();
}
}
else if (ntxIdsToRemove.includes(this.activeNtxId)) {
const idx = this.mainNoteContexts.findIndex(nc => nc.ntxId === noteContextToRemove.ntxId);
this.children = this.children.filter(nc => !ntxIdsToRemove.includes(nc.ntxId));
if (idx === this.mainNoteContexts.length - 1) {
await this.activatePreviousTabCommand();
}
else {
await this.activateNextTabCommand();
}
}
this.recentlyClosedTabs.push(noteContextsToRemove);
this.children = this.children.filter(nc => !ntxIdsToRemove.includes(nc.ntxId));
this.triggerEvent('noteContextRemoved', {ntxIds: ntxIdsToRemove});
this.recentlyClosedTabs.push(noteContextsToRemove);
this.tabsUpdate.scheduleUpdate();
this.triggerEvent('noteContextRemoved', {ntxIds: ntxIdsToRemove});
this.tabsUpdate.scheduleUpdate();
});
}
tabReorderEvent({ntxIdsInOrder}) {