Add PDF printing support (issue #1478).

include/cef_browser.h

@@ -234,6 +234,23 @@ class CefNavigationEntryVisitor : public virtual CefBase {
 };
 
 
+///
+// Callback interface for CefBrowserHost::PrintToPDF. The methods of this class
+// will be called on the browser process UI thread.
+///
+/*--cef(source=client)--*/
+class CefPdfPrintCallback : public virtual CefBase {
+ public:
+  ///
+  // Method that will be executed when the PDF printing has completed. |path|
+  // is the output path. |ok| will be true if the printing completed
+  // successfully or false otherwise.
+  ///
+  /*--cef()--*/
+  virtual void OnPdfPrintFinished(const CefString& path, bool ok) =0;
+};
+
+
 ///
 // Class used to represent the browser process aspects of a browser window. The
 // methods of this class can only be called in the browser process. They may be
@@ -389,6 +406,17 @@ class CefBrowserHost : public virtual CefBase {
   /*--cef()--*/
   virtual void Print() =0;
 
+  ///
+  // Print the current browser contents to the PDF file specified by |path| and
+  // execute |callback| on completion. The caller is responsible for deleting
+  // |path| when done. For PDF printing to work on Linux you must implement the
+  // CefPrintHandler::GetPdfPaperSize method.
+  ///
+  /*--cef(optional_param=callback)--*/
+  virtual void PrintToPDF(const CefString& path,
+                          const CefPdfPrintSettings& settings,
+                          CefRefPtr<CefPdfPrintCallback> callback) =0;
+
   ///
   // Search for |searchText|. |identifier| can be used to have multiple searches
   // running simultaniously. |forward| indicates whether to search forward or