fix: window.print() in pdf plugin (#28328)
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2 changed files with 16 additions and 0 deletions
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@ -94,6 +94,7 @@ const defaultPrintingSetting = {
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pagesPerSheet: 1,
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isFirstRequest: false,
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previewUIID: 0,
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// True, if the document source is modifiable. e.g. HTML and not PDF.
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previewModifiable: true,
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printToPDF: true,
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deviceName: 'Save as PDF',
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@ -11,6 +11,7 @@
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#if BUILDFLAG(ENABLE_EXTENSIONS)
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#include "extensions/common/constants.h"
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#include "extensions/renderer/guest_view/mime_handler_view/post_message_support.h"
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#endif // BUILDFLAG(ENABLE_EXTENSIONS)
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namespace electron {
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@ -50,6 +51,20 @@ bool PrintRenderFrameHelperDelegate::IsPrintPreviewEnabled() {
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bool PrintRenderFrameHelperDelegate::OverridePrint(
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blink::WebLocalFrame* frame) {
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#if BUILDFLAG(ENABLE_EXTENSIONS)
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auto* post_message_support =
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extensions::PostMessageSupport::FromWebLocalFrame(frame);
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if (post_message_support) {
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// This message is handled in chrome/browser/resources/pdf/pdf_viewer.js and
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// instructs the PDF plugin to print. This is to make window.print() on a
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// PDF plugin document correctly print the PDF. See
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// https://crbug.com/448720.
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base::DictionaryValue message;
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message.SetString("type", "print");
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post_message_support->PostMessageFromValue(message);
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return true;
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}
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#endif // BUILDFLAG(ENABLE_EXTENSIONS)
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return false;
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}
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