From a4938311cd8bc1c97eaefb65706c67193189de29 Mon Sep 17 00:00:00 2001
From: Shelley Vohr <shelley.vohr@gmail.com>
Date: Tue, 10 Sep 2024 00:59:19 +0200
Subject: [PATCH] test: add -pdf-ready-to-print event to WebContents for
 testing (#43647)

---
 BUILD.gn                                      |  1 +
 .../browser/api/electron_api_web_contents.cc  |  4 +++
 shell/browser/api/electron_api_web_contents.h |  2 ++
 .../electron_pdf_document_helper_client.cc    | 28 +++++++++++++------
 .../electron_pdf_document_helper_client.h     |  6 ++--
 5 files changed, 30 insertions(+), 11 deletions(-)

diff --git a/BUILD.gn b/BUILD.gn
index 47085deb52d9..1fd6a716ee1a 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -745,6 +745,7 @@ source_set("electron_lib") {
       "//components/pdf/common:util",
       "//components/pdf/renderer",
       "//pdf",
+      "//pdf:content_restriction",
     ]
     sources += [
       "shell/browser/electron_pdf_document_helper_client.cc",
diff --git a/shell/browser/api/electron_api_web_contents.cc b/shell/browser/api/electron_api_web_contents.cc
index d284b4476717..1f17229b9f11 100644
--- a/shell/browser/api/electron_api_web_contents.cc
+++ b/shell/browser/api/electron_api_web_contents.cc
@@ -3744,6 +3744,10 @@ void WebContents::OnInputEvent(const blink::WebInputEvent& event) {
   Emit("input-event", event);
 }
 
+void WebContents::PDFReadyToPrint() {
+  Emit("-pdf-ready-to-print");
+}
+
 void WebContents::RunJavaScriptDialog(content::WebContents* web_contents,
                                       content::RenderFrameHost* rfh,
                                       content::JavaScriptDialogType dialog_type,
diff --git a/shell/browser/api/electron_api_web_contents.h b/shell/browser/api/electron_api_web_contents.h
index 3ec8c6fe58c8..52be8984bd02 100644
--- a/shell/browser/api/electron_api_web_contents.h
+++ b/shell/browser/api/electron_api_web_contents.h
@@ -478,6 +478,8 @@ class WebContents final : public ExclusiveAccessContext,
 
   void SetBackgroundColor(std::optional<SkColor> color);
 
+  void PDFReadyToPrint();
+
   SkRegion* draggable_region() {
     return force_non_draggable_ ? nullptr : draggable_region_.get();
   }
diff --git a/shell/browser/electron_pdf_document_helper_client.cc b/shell/browser/electron_pdf_document_helper_client.cc
index 6250a32ed63e..6902f4c22f55 100644
--- a/shell/browser/electron_pdf_document_helper_client.cc
+++ b/shell/browser/electron_pdf_document_helper_client.cc
@@ -5,17 +5,29 @@
 #include "shell/browser/electron_pdf_document_helper_client.h"
 
 #include "content/public/browser/web_contents.h"
+#include "pdf/content_restriction.h"
+#include "shell/browser/api/electron_api_web_contents.h"
 
 ElectronPDFDocumentHelperClient::ElectronPDFDocumentHelperClient() = default;
 ElectronPDFDocumentHelperClient::~ElectronPDFDocumentHelperClient() = default;
 
 void ElectronPDFDocumentHelperClient::UpdateContentRestrictions(
     content::RenderFrameHost* render_frame_host,
-    int content_restrictions) {}
-void ElectronPDFDocumentHelperClient::OnPDFHasUnsupportedFeature(
-    content::WebContents* contents) {}
-void ElectronPDFDocumentHelperClient::OnSaveURL(
-    content::WebContents* contents) {}
-void ElectronPDFDocumentHelperClient::SetPluginCanSave(
-    content::RenderFrameHost* render_frame_host,
-    bool can_save) {}
+    int content_restrictions) {
+  // UpdateContentRestrictions potentially gets called twice from
+  // pdf/pdf_view_web_plugin.cc.  The first time it is potentially called is
+  // when loading starts and it is called with a restriction on printing.  The
+  // second time it is called is when loading is finished and if printing is
+  // allowed there won't be a printing restriction passed, so we can use this
+  // second call to notify that the pdf document is ready to print.
+  if (!(content_restrictions & chrome_pdf::kContentRestrictionPrint)) {
+    content::WebContents* web_contents =
+        content::WebContents::FromRenderFrameHost(render_frame_host);
+    electron::api::WebContents* api_web_contents =
+        electron::api::WebContents::From(
+            web_contents->GetOutermostWebContents());
+    if (api_web_contents) {
+      api_web_contents->PDFReadyToPrint();
+    }
+  }
+}
diff --git a/shell/browser/electron_pdf_document_helper_client.h b/shell/browser/electron_pdf_document_helper_client.h
index bcc24a077487..55929e961a3c 100644
--- a/shell/browser/electron_pdf_document_helper_client.h
+++ b/shell/browser/electron_pdf_document_helper_client.h
@@ -19,10 +19,10 @@ class ElectronPDFDocumentHelperClient : public pdf::PDFDocumentHelperClient {
   // pdf::PDFDocumentHelperClient
   void UpdateContentRestrictions(content::RenderFrameHost* render_frame_host,
                                  int content_restrictions) override;
-  void OnPDFHasUnsupportedFeature(content::WebContents* contents) override;
-  void OnSaveURL(content::WebContents* contents) override;
+  void OnPDFHasUnsupportedFeature(content::WebContents* contents) override {}
+  void OnSaveURL(content::WebContents* contents) override {}
   void SetPluginCanSave(content::RenderFrameHost* render_frame_host,
-                        bool can_save) override;
+                        bool can_save) override {}
 };
 
 #endif  // ELECTRON_SHELL_BROWSER_ELECTRON_PDF_DOCUMENT_HELPER_CLIENT_H_