--- Download/firefox-1.5.0.1-source/mozilla/layout/printing/nsPrintEngine.cpp	2006-01-11 17:28:14.000000000 +0100
+++ workspace/mozilla/layout/printing/nsPrintEngine.cpp	2006-04-07 00:38:34.000000000 +0200
@@ -60,6 +60,8 @@
 #include "nsXPCOM.h"
 #include "nsISupportsPrimitives.h"
 
+#include <stdlib.h>
+
 // PrintOptions is now implemented by PrintSettingsService
 static const char sPrintSettingsServiceContractID[] = "@mozilla.org/gfx/printsettings-service;1";
 static const char sPrintOptionsContractID[]         = "@mozilla.org/gfx/printsettings-service;1";
@@ -545,6 +547,130 @@
                            nsIDocShell * aDocShell, FILE* aFD);
 #endif
 
+//////////////////////////////////////////////////////////////
+// PATCH TO ALLOW SILENT PRINTING TO POSTSCRIPT FILE FOR YAHP
+// original idea can be found here... don't understand the
+// language but I got the idea
+// http://groups.google.be/group/at.linux/browse_thread/
+// thread/c3372b731efb5de3/e51ce6724523f031?lnk=st&q=
+// batch+print+mozilla&rnum=5&hl=fr#e51ce6724523f031
+// added method :
+// nsPrintEngine::GetEnvVar
+// nsPrintEngine::ConvertToDouble
+// nsPrintEngine::SetPrintSettingsForYaHP
+// SetPrintSettingsForYaHP is called from nsPrintEngine::Print
+//////////////////////////////////////////////////////////////
+/**
+ * This method retrieve the value of the environment variable s
+ * @param env - The mozilla environment object
+ * @param s - a string containing the name of the variable to get
+ * If the variable is set, the value is assigned to the string s
+ */
+void nsPrintEngine::GetEnvVar(nsIEnvironment* env,nsString & s) {
+  PRBool result;
+  // check if the variable is set
+  env->Exists(s,&result);
+  if (result) {
+    // get the value
+    env->Get(s,s);
+    // YaHP set environment variables in UTF-8 format
+    // convert it to the correct encoding
+    // get the char buffer
+    char * val = ToNewCString(s);
+    nsCString cs(val);
+    // convert from UTF-8 to UTF-16 PRUnichar
+    s.Assign(NS_ConvertUTF8toUTF16(cs).get());
+    // release C string memory
+    delete val;
+  } else {
+    // replace by empty string
+    s.Assign(NS_LITERAL_STRING("").get());
+  }
+}
+
+/**
+ * Convert a string to a double
+ * @param s - the String to convert
+ * @param defaultValue - the default value if value is 0.0
+ * @return the converted value or defaultValue.
+ */
+double nsPrintEngine::ConvertToDouble(nsString & s,double defaultValue) {
+  // convert to a C string
+  char * val = ToNewCString(s);
+  // use stdlib.h atof function.
+  double ret = atof(val);
+  // release C string memory
+  delete val;
+  if (ret == 0.0) {
+        return defaultValue;
+  }
+  return ret;
+}
+
+/**
+ * Set the printing environment with value set by YaHPConverter.
+ * @param mPrt - The mozilla print data object
+ */
+void nsPrintEngine::SetPrintSettingsForYaHP(nsPrintData* mPrt) {
+  nsresult rv;
+  nsCOMPtr<nsIEnvironment> env =
+  do_CreateInstance("@mozilla.org/process/environment;1", &rv);
+  if (NS_SUCCEEDED(rv)) {
+    // environment variable set by YaHPConverter
+    nsString mozPsFilename(NS_LITERAL_STRING("MOZ_PS_FILENAME").get());
+    nsString marginTop(NS_LITERAL_STRING("MOZ_MARGIN_TOP").get());
+    nsString marginLeft(NS_LITERAL_STRING("MOZ_MARGIN_LEFT").get());
+    nsString marginBottom(NS_LITERAL_STRING("MOZ_MARGIN_BOTTOM").get());
+    nsString marginRight(NS_LITERAL_STRING("MOZ_MARGIN_RIGHT").get());
+    nsString paperWidth(NS_LITERAL_STRING("MOZ_PAPER_WIDTH").get());
+    nsString paperHeight(NS_LITERAL_STRING("MOZ_PAPER_HEIGHT").get());
+    nsString headerLeft(NS_LITERAL_STRING("MOZ_HEADER_LEFT").get());
+    nsString headerCentre(NS_LITERAL_STRING("MOZ_HEADER_CENTRE").get());
+    nsString headerRight(NS_LITERAL_STRING("MOZ_HEADER_RIGHT").get());
+    nsString footerLeft(NS_LITERAL_STRING("MOZ_FOOTER_LEFT").get());
+    nsString footerCentre(NS_LITERAL_STRING("MOZ_FOOTER_CENTRE").get());
+    nsString footerRight(NS_LITERAL_STRING("MOZ_FOOTER_RIGHT").get());
+    // get the actual value
+    GetEnvVar(env,mozPsFilename);
+    GetEnvVar(env,marginTop);
+    GetEnvVar(env,marginLeft);
+    GetEnvVar(env,marginBottom);
+    GetEnvVar(env,marginRight);
+    GetEnvVar(env,paperWidth);
+    GetEnvVar(env,paperHeight);
+    GetEnvVar(env,headerLeft);
+    GetEnvVar(env,headerCentre);
+    GetEnvVar(env,headerRight);
+    GetEnvVar(env,footerLeft);
+    GetEnvVar(env,footerCentre);
+    GetEnvVar(env,footerRight);
+    // Set print properties
+    // ==> To a file
+    // ==> Silent (no selection popup)
+    mPrt->mPrintSettings->SetPrintToFile( PR_TRUE );
+    mPrt->mPrintSettings->SetPrintSilent( PR_TRUE );
+    mPrt->mPrintSettings->SetPrintInColor( PR_TRUE );
+    mPrt->mPrintSettings->SetPrintBGColors( PR_TRUE );
+    mPrt->mPrintSettings->SetToFileName(mozPsFilename.get());
+    // Set header/footer
+    mPrt->mPrintSettings->SetHeaderStrLeft(headerLeft.get());
+    mPrt->mPrintSettings->SetHeaderStrCenter(headerCentre.get());
+    mPrt->mPrintSettings->SetHeaderStrRight(headerRight.get());
+    mPrt->mPrintSettings->SetFooterStrLeft(footerLeft.get());
+    mPrt->mPrintSettings->SetFooterStrCenter(footerCentre.get());
+    mPrt->mPrintSettings->SetFooterStrRight(footerRight.get());
+    // Set margin
+    mPrt->mPrintSettings->SetMarginTop(ConvertToDouble(marginTop,0.39));
+    mPrt->mPrintSettings->SetMarginLeft(ConvertToDouble(marginLeft,0.39));
+    mPrt->mPrintSettings->SetMarginBottom(ConvertToDouble(marginBottom,0.39));
+    mPrt->mPrintSettings->SetMarginRight(ConvertToDouble(marginRight,0.39));
+    // Set paper size
+    mPrt->mPrintSettings->SetPaperWidth(ConvertToDouble(paperWidth,210.0));
+    mPrt->mPrintSettings->SetPaperHeight(ConvertToDouble(paperHeight,290.0));
+    mPrt->mPrintSettings->SetPaperSizeUnit(nsIPrintSettings::kPaperSizeMillimeters);
+  }
+}
+
 //---------------------------------------------------------------------------------
 NS_IMETHODIMP
 nsPrintEngine::Print(nsIPrintSettings*       aPrintSettings,
@@ -577,6 +703,8 @@
   if (!mPrt->mPrintSettings) {
     GetGlobalPrintSettings(getter_AddRefs(mPrt->mPrintSettings));
   }
+  // Set YaHPConverter properties in the print object
+  SetPrintSettingsForYaHP(mPrt);
 
   mPrt->mPrintOptions = do_GetService(sPrintOptionsContractID, &rv);
   if (NS_SUCCEEDED(rv) && mPrt->mPrintOptions && mPrt->mPrintSettings) {