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JS -- Plug PageOpen and PageClose actions

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This commit is contained in:
Calixte Denizet 2021-01-05 15:53:30 +01:00
parent ed3758f84d
commit 6523f8880b
5 changed files with 172 additions and 16 deletions
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60
web/app.js
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@ -1542,6 +1542,64 @@ const PDFViewerApplication = {
};
internalEvents.set("updatefromsandbox", updateFromSandbox);
const visitedPages = new Map();
const pageOpen = ({ pageNumber }) => {
visitedPages.set(
pageNumber,
(async () => {
// Avoid sending, and thus serializing, the `actions` data
// when the same page is open several times.
let actions = null;
if (!visitedPages.has(pageNumber)) {
// visitedPages doesn't contain pageNumber: first visit.
const pageView = this.pdfViewer.getPageView(
/* index = */ pageNumber - 1
);
if (pageView?.pdfPage) {
actions = await pageView.pdfPage.getJSActions();
} else {
actions = await pdfDocument.getPage(pageNumber).getJSActions();
}
if (pdfDocument !== this.pdfDocument) {
return; // The document was closed while the actions resolved.
}
}
this._scriptingInstance?.scripting.dispatchEventInSandbox({
id: "page",
name: "PageOpen",
pageNumber,
actions,
});
})()
);
};
const pageClose = async ({ pageNumber }) => {
const promise = visitedPages.get(pageNumber);
if (!promise) {
return;
}
visitedPages.set(pageNumber, null);
// Wait for PageOpen has been sent.
await promise;
if (pdfDocument !== this.pdfDocument) {
return; // The document was closed while the actions resolved.
}
this._scriptingInstance?.scripting.dispatchEventInSandbox({
id: "page",
name: "PageClose",
pageNumber,
});
};
internalEvents.set("pageopen", pageOpen);
internalEvents.set("pageclose", pageClose);
const dispatchEventInSandbox = ({ detail }) => {
scripting.dispatchEventInSandbox(detail);
};
@ -1613,6 +1671,8 @@ const PDFViewerApplication = {
name: "Open",
});
await pageOpen({ pageNumber: this.pdfViewer.currentPageNumber });
// Used together with the integration-tests, see the `scriptingReady`
// getter, to enable awaiting full initialization of the scripting/sandbox.
// (Defer this slightly, to make absolutely sure that everything is done.)