From 91d1e3608e3bb97adcd7bb9259f8771c22becd0f Mon Sep 17 00:00:00 2001
From: Ben Hutchings <ben@decadent.org.uk>
Date: Wed, 5 Apr 2006 23:29:37 +0000
Subject: [PATCH] Added hack to treat alert prompts as fatal errors. Added flag
 for successful finish to webdvd_window and used it to decide the exit code.

---
 null_prompt_service.cpp | 61 +++++++++++++++++++++++++++++++++++++++--
 webdvd.cpp              | 27 ++++++++++++++++--
 webdvd.hpp              |  8 ++++++
 3 files changed, 90 insertions(+), 6 deletions(-)
 create mode 100644 webdvd.hpp

diff --git a/null_prompt_service.cpp b/null_prompt_service.cpp
index c1d24be..dca7810 100644
--- a/null_prompt_service.cpp
+++ b/null_prompt_service.cpp
@@ -1,11 +1,19 @@
 // Copyright 2006 Ben Hutchings <ben@decadentplace.org.uk>.
 // See the file "COPYING" for licence details.
 
+#include <string>
+
+#include <langinfo.h>
+
 #include <nsCOMPtr.h>
+#include <nsICharsetConverterManager.h>
 #include <nsIComponentManager.h>
 #include <nsIFactory.h>
+#include <nsIServiceManagerUtils.h>
+#include <nsIUnicodeEncoder.h>
 
 #include "null_prompt_service.hpp"
+#include "webdvd.hpp"
 #include "xpcom_support.hpp"
 
 using xpcom_support::check;
@@ -43,20 +51,67 @@ namespace
     {
 	return NS_ERROR_NOT_IMPLEMENTED;
     }
+
+    std::string native_error_string(const PRUnichar * text)
+    {
+	std::string result;
+	PRInt32 text_len = 0;
+	while (text[text_len])
+	    ++text_len;
+
+	nsCOMPtr<nsICharsetConverterManager> conv_manager;
+	nsCOMPtr<nsIUnicodeEncoder> encoder;
+	static const nsCID charset_converter_manager_cid =
+	    NS_ICHARSETCONVERTERMANAGER_CID;
+	if (NS_SUCCEEDED(CallGetService<nsICharsetConverterManager>(
+			     charset_converter_manager_cid,
+			     getter_AddRefs(conv_manager)))
+	    && NS_SUCCEEDED(conv_manager->GetUnicodeEncoder(
+				nl_langinfo(CODESET),
+				getter_AddRefs(encoder))))
+	{
+	    encoder->SetOutputErrorBehavior(
+		nsIUnicodeEncoder::kOnError_Replace, NULL, PRUnichar('?'));
+
+	    char buf[1000];  // Hopefully long enough for an error message
+
+	    char * out = buf;
+	    PRInt32 out_len = sizeof(buf);
+	    encoder->Convert(text, &text_len, out, &out_len);
+	    out += out_len;
+
+	    out_len = sizeof(buf) - out_len;
+	    encoder->Finish(out, &out_len);
+	    out += out_len;
+
+	    result.assign(buf, out);
+	}
+	else
+	{
+	    // Convert to ASCII
+	    result.resize(text_len);
+	    for (PRInt32 i = 0; i != text_len; ++i)
+		result[i] = (text[i] < 0x80) ? text[i] : '?';
+	}
+
+	return result;
+    }
 }
 
 NS_IMPL_ISUPPORTS1(null_prompt_service, nsIPromptService)
 
 NS_IMETHODIMP null_prompt_service::Alert(
-    nsIDOMWindow *, const PRUnichar *, const PRUnichar *)
+    nsIDOMWindow *, const PRUnichar *, const PRUnichar * text)
 {
+    fatal_error(native_error_string(text));
     return NS_OK;
 }
 
 NS_IMETHODIMP null_prompt_service::AlertCheck(
-    nsIDOMWindow *, const PRUnichar *, const PRUnichar *, const PRUnichar *,
-    PRBool *)
+    nsIDOMWindow *, const PRUnichar *, const PRUnichar * text,
+    const PRUnichar *, PRBool *)
 {
+    fatal_error(native_error_string(text));
     return NS_OK;
 }
 
diff --git a/webdvd.cpp b/webdvd.cpp
index c4cf8a9..3c21c28 100644
--- a/webdvd.cpp
+++ b/webdvd.cpp
@@ -154,6 +154,8 @@ namespace
 	    const std::string & main_page_uri,
 	    const std::string & output_dir);
 
+	bool is_finished() const;
+
     private:
 	dvd_contents::pgc_ref add_menu(const std::string & uri);
 	dvd_contents::pgc_ref add_title(const std::string & uri);
@@ -185,6 +187,8 @@ namespace
 	std::auto_ptr<temp_file> background_temp_;
 	struct page_state;
 	std::auto_ptr<page_state> page_state_;
+
+	bool finished_;
     };
 
     webdvd_window::webdvd_window(
@@ -196,7 +200,8 @@ namespace
 	      stylesheet_(load_css("file://" WEBDVD_LIB_DIR "/webdvd.css")),
 	      pending_window_update_(false),
 	      pending_req_count_(0),
-	      have_tweaked_page_(false)
+	      have_tweaked_page_(false),
+	      finished_(false)
     {
 	set_size_request(frame_params_.width, frame_params_.height);
 	set_resizable(false);
@@ -210,6 +215,11 @@ namespace
 	load_next_page();
     }
 
+    bool webdvd_window::is_finished() const
+    {
+	return finished_;
+    }
+
     dvd_contents::pgc_ref webdvd_window::add_menu(const std::string & uri)
     {
 	dvd_contents::pgc_ref next_menu(dvd_contents::menu_pgc,
@@ -357,7 +367,10 @@ namespace
 	    try
 	    {
 		if (!process_page())
+		{
+		    finished_ = true;
 		    Gtk::Main::quit();
+		}
 	    }
 	    catch (std::exception & e)
 	    {
@@ -820,6 +833,12 @@ namespace
 
 } // namespace
 
+void fatal_error(const std::string & message)
+{
+    std::cerr << "Fatal error: " << message << "\n";
+    Gtk::Main::quit();
+}
+
 int main(int argc, char ** argv)
 {
     try
@@ -943,12 +962,14 @@ int main(int argc, char ** argv)
 	// Run the browser/converter
 	webdvd_window window(frame_params, menu_url, output_dir);
 	Gtk::Main::run(window);
+
+	return ((preview_mode || window.is_finished())
+		? EXIT_SUCCESS
+		: EXIT_FAILURE);
     }
     catch (std::exception & e)
     {
 	std::cerr << "Fatal error: " << e.what() << "\n";
 	return EXIT_FAILURE;
     }
-
-    return EXIT_SUCCESS;
 }
diff --git a/webdvd.hpp b/webdvd.hpp
new file mode 100644
index 0000000..d281814
--- /dev/null
+++ b/webdvd.hpp
@@ -0,0 +1,8 @@
+#ifndef INC_WEBDVD_HPP
+#define INC_WEBDVD_HPP
+
+#include <string>
+
+void fatal_error(const std::string & message);
+
+#endif // !INC_WEBDVD_HPP
-- 
2.39.2