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Always attempt to dispatch the "webviewerloaded" event at the embedding document (PR 10318 follow-up, issue 11829)

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This is necessary in order to support cases where the default viewer is embedded in a *dynamically* created <iframe> element.

In order to also support a use-case where there's *multiple* <iframe> elements (containing default viewers) on the same page, the "webviewerloaded" event now includes a `source` detail parameter such that it's possible to associate an event with the relevant DOM element.
This commit is contained in:
Jonas Jenwald 2020-04-22 18:04:30 +02:00
parent 571f287983
commit 479173ce45
1 changed files with 14 additions and 2 deletions
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16
web/viewer.js
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@ -211,8 +211,20 @@ function webViewerLoad() {
// set various `AppOptions`, by dispatching an event once all viewer
// files are loaded but *before* the viewer initialization has run.
const event = document.createEvent("CustomEvent");
event.initCustomEvent("webviewerloaded", true, true, {});
document.dispatchEvent(event);
event.initCustomEvent("webviewerloaded", true, true, {
source: window,
});
try {
// Attempt to dispatch the event at the embedding `document`,
// in order to support cases where the viewer is embedded in
// a *dynamically* created <iframe> element.
parent.document.dispatchEvent(event);
} catch (ex) {
// The viewer could be in e.g. a cross-origin <iframe> element,
// fallback to dispatching the event at the current `document`.
console.error(`webviewerloaded: ${ex}`);
document.dispatchEvent(event);
}
}
pdfjsWebApp.PDFViewerApplication.run(config);