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PopupProxy refactor (#609)

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* Remove setDisabled member; replace with an event

* Pass frameOffsetForwarder directly to PopupProxy

* Replace .start with .prepare

* Make onMessage private

* Make message safer and handle unexpected inputs
This commit is contained in:
toasted-nutbread 2020-06-14 14:06:52 -04:00 committed by GitHub
parent 8d1a276a83
commit b612bd8b8d
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GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 31 additions and 24 deletions
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7
ext/fg/js/content-script-main.js
View File

@ -49,9 +49,8 @@ async function createIframePopupProxy(frameOffsetForwarder, setDisabled) {
api.broadcastTab('rootPopupRequestInformationBroadcast');
const {popupId, frameId: parentFrameId} = await rootPopupInformationPromise;
const getFrameOffset = frameOffsetForwarder.getOffset.bind(frameOffsetForwarder);
const popup = new PopupProxy(popupId, 0, null, parentFrameId, getFrameOffset, setDisabled);
const popup = new PopupProxy(popupId, 0, null, parentFrameId, frameOffsetForwarder);
popup.on('offsetNotFound', setDisabled);
await popup.prepare();
return popup;
@ -115,7 +114,7 @@ async function createPopupProxy(depth, id, parentFrameId) {
if (!proxy && frameOffsetForwarder === null) {
frameOffsetForwarder = new FrameOffsetForwarder();
frameOffsetForwarder.start();
frameOffsetForwarder.prepare();
}
let popup;

26
ext/fg/js/frame-offset-forwarder.js
View File

@ -21,8 +21,7 @@
class FrameOffsetForwarder {
constructor() {
this._started = false;
this._isPrepared = false;
this._cacheMaxSize = 1000;
this._frameCache = new Set();
this._unreachableContentWindowCache = new Set();
@ -38,10 +37,10 @@ class FrameOffsetForwarder {
]);
}
start() {
if (this._started) { return; }
window.addEventListener('message', this.onMessage.bind(this), false);
this._started = true;
prepare() {
if (this._isPrepared) { return; }
window.addEventListener('message', this._onMessage.bind(this), false);
this._isPrepared = true;
}
async getOffset() {
@ -69,11 +68,20 @@ class FrameOffsetForwarder {
return offset;
}
onMessage(e) {
const {action, params} = e.data;
// Private
_onMessage(event) {
const data = event.data;
if (data === null || typeof data !== 'object') { return; }
try {
const {action, params} = event.data;
const handler = this._windowMessageHandlers.get(action);
if (typeof handler !== 'function') { return; }
handler(params, e);
handler(params, event);
} catch (e) {
// NOP
}
}
_onGetFrameOffset(offset, uniqueId, e) {

18
ext/fg/js/popup-proxy.js
View File

@ -19,14 +19,14 @@
* api
*/
class PopupProxy {
constructor(id, depth, parentPopupId, parentFrameId, getFrameOffset=null, setDisabled=null) {
class PopupProxy extends EventDispatcher {
constructor(id, depth, parentPopupId, parentFrameId, frameOffsetForwarder=null) {
super();
this._id = id;
this._depth = depth;
this._parentPopupId = parentPopupId;
this._parentFrameId = parentFrameId;
this._getFrameOffset = getFrameOffset;
this._setDisabled = setDisabled;
this._frameOffsetForwarder = frameOffsetForwarder;
this._frameOffset = null;
this._frameOffsetPromise = null;
@ -75,7 +75,7 @@ class PopupProxy {
}
async containsPoint(x, y) {
if (this._getFrameOffset !== null) {
if (this._frameOffsetForwarder !== null) {
await this._updateFrameOffset();
[x, y] = this._applyFrameOffset(x, y);
}
@ -84,7 +84,7 @@ class PopupProxy {
async showContent(elementRect, writingMode, type, details, context) {
let {x, y, width, height} = elementRect;
if (this._getFrameOffset !== null) {
if (this._frameOffsetForwarder !== null) {
await this._updateFrameOffset();
[x, y] = this._applyFrameOffset(x, y);
}
@ -134,12 +134,12 @@ class PopupProxy {
}
async _updateFrameOffsetInner(now) {
this._frameOffsetPromise = this._getFrameOffset();
this._frameOffsetPromise = this._frameOffsetForwarder.getOffset();
try {
const offset = await this._frameOffsetPromise;
this._frameOffset = offset !== null ? offset : [0, 0];
if (offset === null && this._setDisabled !== null) {
this._setDisabled();
if (offset === null) {
this.trigger('offsetNotFound');
return;
}
this._frameOffsetUpdatedAt = now;