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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at <http://mozilla.org/MPL/2.0/>. */
/**
* Tabs reducer
* @module reducers/tabs
*/
import { isSimilarTab } from "../utils/tabs";
export function initialTabState() {
return { tabs: [] };
}
function update(state = initialTabState(), action) {
switch (action.type) {
case "ADD_TAB":
return updateTabList(state, action.source, action.sourceActor);
case "MOVE_TAB":
return moveTabInList(state, action);
case "MOVE_TAB_BY_SOURCE_ID":
return moveTabInListBySourceId(state, action);
case "CLOSE_TABS":
return removeSourcesFromTabList(state, action);
case "ADD_ORIGINAL_SOURCES":
return addVisibleTabsForOriginalSources(
state,
action.originalSources,
action.generatedSourceActor
);
case "INSERT_SOURCE_ACTORS":
return addVisibleTabsForSourceActors(state, action.sourceActors);
case "REMOVE_THREAD": {
return resetTabsForThread(state, action.threadActorID);
}
default:
return state;
}
}
function matchesSource(tab, source) {
return tab.source?.id === source.id || matchesUrl(tab, source);
}
function matchesUrl(tab, source) {
return (
source.url && tab.url === source.url && tab.isOriginal == source.isOriginal
);
}
function addVisibleTabsForSourceActors(state, sourceActors) {
let changed = false;
// Lookups for tabs matching any source actor's URL
// and reference their source and sourceActor attribute
// so that the tab becomes visible.
const tabs = state.tabs.map(tab => {
const sourceActor = sourceActors.find(actor =>
matchesUrl(tab, actor.sourceObject)
);
if (!sourceActor) {
return tab;
}
changed = true;
return {
...tab,
source: sourceActor.sourceObject,
sourceActor,
};
});
return changed ? { tabs } : state;
}
function addVisibleTabsForOriginalSources(
state,
sources,
generatedSourceActor
) {
let changed = false;
// Lookups for tabs matching any source's URL
// and reference their source and sourceActor attribute
// so that the tab becomes visible.
const tabs = state.tabs.map(tab => {
const source = sources.find(s => matchesUrl(tab, s));
if (!source) {
return tab;
}
changed = true;
return {
...tab,
source,
// All currently reported original sources are related to a single source actor
sourceActor: generatedSourceActor,
};
});
return changed ? { tabs } : state;
}
function removeSourcesFromTabList(state, { sources }) {
const newTabs = sources.reduce(
(tabList, source) => tabList.filter(tab => !matchesSource(tab, source)),
state.tabs
);
if (newTabs.length == state.tabs.length) {
return state;
}
return { tabs: newTabs };
}
function resetTabsForThread(state, threadActorID) {
let changed = false;
// Nullify source and sourceActor attributes of all tabs
// related to the given thread so that they become hidden.
//
// They may later be restored if a source matches their URL again.
// This is similar to persistTabs, but specific to a unique thread.
const tabs = state.tabs.map(tab => {
if (tab.sourceActor?.thread != threadActorID) {
return tab;
}
changed = true;
return {
...tab,
source: null,
sourceActor: null,
};
});
return changed ? { tabs } : state;
}
/**
* Adds the new source to the tab list if it is not already there.
*/
function updateTabList(state, source, sourceActor) {
const { url } = source;
const isOriginal = source.isOriginal;
let { tabs } = state;
// Set currentIndex to -1 for URL-less tabs so that they aren't
// filtered by isSimilarTab
const currentIndex = url
? tabs.findIndex(tab => isSimilarTab(tab, url, isOriginal))
: -1;
if (currentIndex === -1) {
const newTab = {
url,
source,
isOriginal,
sourceActor,
};
// New tabs are added first in the list
tabs = [newTab, ...tabs];
} else {
return state;
}
return { ...state, tabs };
}
function moveTabInList(state, { url, tabIndex: newIndex }) {
const currentIndex = state.tabs.findIndex(tab => tab.url == url);
return moveTab(state, currentIndex, newIndex);
}
function moveTabInListBySourceId(state, { sourceId, tabIndex: newIndex }) {
const currentIndex = state.tabs.findIndex(tab => tab.source?.id == sourceId);
return moveTab(state, currentIndex, newIndex);
}
function moveTab(state, currentIndex, newIndex) {
const { tabs } = state;
const item = tabs[currentIndex];
// Avoid any state change if we are on the same position or the new is invalid
if (currentIndex == newIndex || isNaN(newIndex)) {
return state;
}
const newTabs = Array.from(tabs);
// Remove the item from its current location
newTabs.splice(currentIndex, 1);
// And add it to the new one
newTabs.splice(newIndex, 0, item);
return { tabs: newTabs };
}
export default update;
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