Re-enable print preview gui stuff (which was mostly off) on GTK and Xlib

ports.  Bug 187125, patch by Roland.Mainz@informatik.med.uni-giessen.de (Roland
Mainz), r=smontagu, sr=rbs

content/base/src/nsPrintEngine.cpp

@@ -584,19 +584,6 @@ nsPrintEngine::Print(nsIPrintSettings*       aPrintSettings,
   nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(mContainer));
   NS_ASSERTION(docShell, "This has to be a docshell");
 
-
-  if (mIsDoingPrintPreview) {
-    PRBool okToPrint = PR_FALSE;
-    nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
-    if (prefBranch) {
-      prefBranch->GetBoolPref("print.whileInPrintPreview", &okToPrint);
-    }
-    if (!okToPrint) {
-      ShowPrintErrorDialog(NS_ERROR_GFX_PRINTER_PRINT_WHILE_PREVIEW, PR_FALSE);
-      return NS_OK;
-    }
-  }
-
   mPrt = new nsPrintData(nsPrintData::eIsPrinting);
   if (!mPrt) {
     PR_PL(("NS_ERROR_OUT_OF_MEMORY - Creating PrintData"));

gfx/src/gtk/nsDeviceContextSpecG.cpp

@@ -125,6 +125,11 @@ public:
 
   /* Does this device allow to set/change number of copies for an document ? */
   void SetCanChangeNumCopies( PRBool aCanSetNumCopies );
+
+  /* Does this device allow multiple devicecontext instances to be used in
+   * parallel (e.g. print while the device is already in use by print-preview
+   * or printing while another print job is in progress) ? */
+  void SetMultipleConcurrentDeviceContextsSupported( PRBool aCanUseMultipleInstances );
   
 private:
   /* private helper methods */
@@ -204,6 +209,11 @@ void nsPrinterFeatures::SetCanChangeNumCopies( PRBool aCanSetNumCopies )
   SetBoolValue("can_change_num_copies", aCanSetNumCopies);
 }
 
+void nsPrinterFeatures::SetMultipleConcurrentDeviceContextsSupported( PRBool aCanUseMultipleInstances )
+{
+  SetBoolValue("can_use_multiple_devicecontexts_concurrently", aCanUseMultipleInstances);
+}
+
 #endif /* SET_PRINTER_FEATURES_VIA_PREFS */
 
 //---------------
@@ -791,6 +801,10 @@ NS_IMETHODIMP nsPrinterEnumeratorGTK::InitPrintSettingsFromPrinter(const PRUnich
     /* Xprint does not allow the client to set a spooler command. 
      * Job spooling is the job of the server side (=Xprt) */
     printerFeatures.SetCanChangeSpoolerCommand(PR_FALSE);
+
+    /* Mozilla's Xprint support allows multiple nsIDeviceContext instances
+     * be used in parallel */
+    printerFeatures.SetMultipleConcurrentDeviceContextsSupported(PR_TRUE);
 #endif /* SET_PRINTER_FEATURES_VIA_PREFS */
 
     XpuClosePrinterDisplay(pdpy, pcontext);

gfx/src/xlib/nsDeviceContextSpecXlib.cpp

@@ -125,7 +125,12 @@ public:
 
   /* Does this device allow to set/change number of copies for an document ? */
   void SetCanChangeNumCopies( PRBool aCanSetNumCopies );
-  
+
+  /* Does this device allow multiple devicecontext instances to be used in
+   * parallel (e.g. print while the device is already in use by print-preview
+   * or printing while another print job is in progress) ? */
+  void SetMultipleConcurrentDeviceContextsSupported( PRBool aCanUseMultipleInstances );
+   
 private:
   /* private helper methods */
   void SetBoolValue( const char *tagname, PRBool value );
@@ -204,6 +209,11 @@ void nsPrinterFeatures::SetCanChangeNumCopies( PRBool aCanSetNumCopies )
   SetBoolValue("can_change_num_copies", aCanSetNumCopies);
 }
 
+void nsPrinterFeatures::SetMultipleConcurrentDeviceContextsSupported( PRBool aCanUseMultipleInstances )
+{
+  SetBoolValue("can_use_multiple_devicecontexts_concurrently", aCanUseMultipleInstances);
+}
+
 #endif /* SET_PRINTER_FEATURES_VIA_PREFS */
 
 //---------------
@@ -799,6 +809,10 @@ NS_IMETHODIMP nsPrinterEnumeratorXlib::InitPrintSettingsFromPrinter(const PRUnic
     /* Xprint does not allow the client to set a spooler command. 
      * Job spooling is the job of the server side (=Xprt) */
     printerFeatures.SetCanChangeSpoolerCommand(PR_FALSE);
+
+    /* Mozilla's Xprint support allows multiple nsIDeviceContext instances
+     * be used in parallel */
+    printerFeatures.SetMultipleConcurrentDeviceContextsSupported(PR_TRUE);
 #endif /* SET_PRINTER_FEATURES_VIA_PREFS */
 
     XpuClosePrinterDisplay(pdpy, pcontext);

gfx/src/xlib/nsDeviceContextX.h

@@ -44,6 +44,7 @@
 #include "xlibrgb.h"
 
 class nsFontMetricsXlibContext;
+class nsRenderingContextXlibContext;
 
 /* common baseclass for |nsDeviceContextXlib| and |nsDeviceContextXp| */
 class nsDeviceContextX : public DeviceContextImpl
@@ -60,6 +61,7 @@ public:
   NS_IMETHOD GetXlibRgbHandle(XlibRgbHandle *&aHandle) = 0;
 
   virtual void GetFontMetricsContext(nsFontMetricsXlibContext *&aContext) = 0;
+  virtual void GetRCContext(nsRenderingContextXlibContext *&aContext) = 0;
 };
 
 #endif /* !nsDeviceContextX_h__ */

gfx/src/xlib/nsDeviceContextXlib.cpp

@@ -100,7 +100,7 @@ nsDeviceContextXlib::nsDeviceContextXlib()
   if (!mXlibRgbHandle)
     abort();
     
-  mFontMetricsContextCounter++;
+  mContextCounter++;
 }
 
 nsDeviceContextXlib::~nsDeviceContextXlib()
@@ -109,17 +109,20 @@ nsDeviceContextXlib::~nsDeviceContextXlib()
   NS_IF_RELEASE(surf);
   mSurface = nsnull;
   
-  mFontMetricsContextCounter--;
+  mContextCounter--;
   
-  if (mFontMetricsContext && (mFontMetricsContextCounter == 0))
+  if (mContextCounter == 0)
   {
+    DeleteRenderingContextXlibContext(mRCContext);
     DeleteFontMetricsXlibContext(mFontMetricsContext);
+    mRCContext          = nsnull;
     mFontMetricsContext = nsnull;
   }
 }
 
-nsFontMetricsXlibContext *nsDeviceContextXlib::mFontMetricsContext = nsnull;
+nsFontMetricsXlibContext      *nsDeviceContextXlib::mFontMetricsContext = nsnull;
-int                       nsDeviceContextXlib::mFontMetricsContextCounter = 0;
+nsRenderingContextXlibContext *nsDeviceContextXlib::mRCContext          = nsnull;
+int                            nsDeviceContextXlib::mContextCounter     = 0;
 
 NS_IMETHODIMP nsDeviceContextXlib::Init(nsNativeWidget aNativeWidget)
 {
@@ -203,6 +206,15 @@ nsDeviceContextXlib::CommonInit(void)
   if (!mFontMetricsContext)
   {
     rv = CreateFontMetricsXlibContext(this, PR_FALSE, &mFontMetricsContext);
+    if (NS_FAILED(rv))
+      return rv;
+  }
+
+  if (!mRCContext)
+  {
+    rv = CreateRenderingContextXlibContext(this, &mRCContext);
+    if (NS_FAILED(rv))
+      return rv;
   }
    
   return rv;

gfx/src/xlib/nsDeviceContextXlib.h

@@ -89,6 +89,7 @@ public:
   XlibRgbHandle *GetXlibRgbHandle() { return mXlibRgbHandle; }
   NS_IMETHOD GetDepth( PRUint32 &depth ) { depth = (PRUint32)mDepth; return NS_OK; }
   virtual void GetFontMetricsContext(nsFontMetricsXlibContext *&aContext) { aContext = mFontMetricsContext; };
+  virtual void GetRCContext(nsRenderingContextXlibContext *&aContext) { aContext = mRCContext; };
 
 protected:
   virtual ~nsDeviceContextXlib();
@@ -103,8 +104,9 @@ private:
   Screen *             mScreen;
   Visual *             mVisual;
   int                  mDepth;
-  static nsFontMetricsXlibContext *mFontMetricsContext;
+  static nsFontMetricsXlibContext      *mFontMetricsContext;
-  static int                       mFontMetricsContextCounter;
+  static nsRenderingContextXlibContext *mRCContext;
+  static int                            mContextCounter;
 
   float                mWidthFloat;
   float                mHeightFloat;

gfx/src/xlib/nsGfxFactoryXlib.cpp

@@ -201,7 +201,6 @@ static const nsModuleComponentInfo components[] =
 PR_STATIC_CALLBACK(void)
 nsGfxXlibModuleDtor(nsIModule *self)
 {
-     nsRenderingContextXlib::Shutdown();
 }
 
 NS_IMPL_NSGETMODULE_WITH_DTOR(nsGfxXlibModule, components, nsGfxXlibModuleDtor)

gfx/src/xlib/nsRenderingContextXlib.cpp

@@ -74,7 +74,34 @@ static void Widen8To16AndDraw(Drawable    drawable,
                               int          text_length);
 
 
-nsGCCacheXlib *nsRenderingContextXlib::gcCache = nsnull;
+class nsRenderingContextXlibContext
+{
+public:
+  nsGCCacheXlib mGcCache;
+};
+
+nsresult CreateRenderingContextXlibContext(nsIDeviceContext *aDevice, nsRenderingContextXlibContext **aContext)
+{
+  nsRenderingContextXlibContext *rcctx;
+  
+  *aContext = nsnull;
+  
+  rcctx = new nsRenderingContextXlibContext();
+  if (!rcctx)
+    return NS_ERROR_OUT_OF_MEMORY;
+  
+  /* No |Init()|-function to call (yet) */ 
+  *aContext = rcctx;
+  
+  return NS_OK;
+}
+
+void DeleteRenderingContextXlibContext(nsRenderingContextXlibContext *aContext)
+{
+  if (aContext) {
+    delete aContext;
+  }
+}
 
 class GraphicsState
 {
@@ -142,16 +169,6 @@ nsRenderingContextXlib::~nsRenderingContextXlib()
     mGC->Release();
 }
 
-/*static*/ nsresult
-nsRenderingContextXlib::Shutdown()
-{
-  if (gcCache) {
-    delete gcCache;
-    gcCache = nsnull;
-  }
-  return NS_OK;
-}
-
 NS_IMETHODIMP
 nsRenderingContextXlib::Init(nsIDeviceContext* aContext, nsIWidget *aWindow)
 {
@@ -604,15 +621,13 @@ void nsRenderingContextXlib::UpdateGC()
    if (mClipRegion) { 
      mClipRegion->GetNativeRegion((void*&)rgn);
    }
- 
-   if (!gcCache) {
-     gcCache = new nsGCCacheXlib();
-     if (!gcCache) 
-       return;
-   }
 
-   mGC = gcCache->GetGC(mDisplay, drawable,
+   nsRenderingContextXlibContext *rcContext;
-                        valuesMask, &values, rgn);
+   nsIDeviceContext *dc = mContext;
+   NS_STATIC_CAST(nsDeviceContextX *, dc)->GetRCContext(rcContext);
+   
+   mGC = rcContext->mGcCache.GetGC(mDisplay, drawable,
+                                  valuesMask, &values, rgn);
 }
 
 NS_IMETHODIMP

gfx/src/xlib/nsRenderingContextXlib.h

@@ -66,7 +66,6 @@ class nsRenderingContextXlib : public nsRenderingContextImpl
 public:
   nsRenderingContextXlib();
   virtual ~nsRenderingContextXlib();
-  static nsresult Shutdown(); // release statics
 
   NS_DECL_AND_IMPL_ZEROING_OPERATOR_NEW
 
@@ -272,8 +271,10 @@ protected:
       w  = 32766 - x;
     }
   }
-
-  static nsGCCacheXlib *gcCache;
 };
 
+/* Prototypes */
+nsresult CreateRenderingContextXlibContext(nsIDeviceContext *aDevice, nsRenderingContextXlibContext **aContext);
+void DeleteRenderingContextXlibContext(nsRenderingContextXlibContext *aContext);
+
 #endif /* !nsRenderingContextXlib_h___ */

gfx/src/xprint/nsDeviceContextXP.cpp

@@ -62,7 +62,8 @@ nsDeviceContextXp :: nsDeviceContextXp()
     mPrintContext(nsnull),
     mSpec(nsnull),
     mParentDeviceContext(nsnull),
-    mFontMetricsContext(nsnull)
+    mFontMetricsContext(nsnull),
+    mRCContext(nsnull)
 {
 }
 
@@ -144,15 +145,18 @@ nsDeviceContextXp::InitDeviceContextXP(nsIDeviceContext *aCreatingDeviceContext,
   mParentDeviceContext = aParentContext;
 
   /* be sure we've cleaned-up old rubbish - new values will re-populate nsFontMetricsXlib soon... */
-  if (mFontMetricsContext)
+  DeleteRenderingContextXlibContext(mRCContext);
-  {
+  DeleteFontMetricsXlibContext(mFontMetricsContext);
-    DeleteFontMetricsXlibContext(mFontMetricsContext);
+  mRCContext          = nsnull;
-    mFontMetricsContext = nsnull;
+  mFontMetricsContext = nsnull;
-  }
  
   rv = CreateFontMetricsXlibContext(this, PR_TRUE, &mFontMetricsContext);
   if (NS_FAILED(rv))
     return rv;
+
+  rv = CreateRenderingContextXlibContext(this, &mRCContext);
+  if (NS_FAILED(rv))
+    return rv;
    
   return NS_OK;
 }
@@ -310,12 +314,10 @@ void nsDeviceContextXp::DestroyXPContext()
    * properties (build-in fonts for example ) than the printer
    * previously used. */
   FlushFontCache();
-  nsRenderingContextXlib::Shutdown();
+  DeleteRenderingContextXlibContext(mRCContext);
-  if (mFontMetricsContext)
+  DeleteFontMetricsXlibContext(mFontMetricsContext);
-  {
+  mRCContext          = nsnull;
-    DeleteFontMetricsXlibContext(mFontMetricsContext);
+  mFontMetricsContext = nsnull;
-    mFontMetricsContext = nsnull;
-  }
 
   mPrintContext = nsnull; // nsCOMPtr will call |delete mPrintContext;|
 }

gfx/src/xprint/nsDeviceContextXP.h

@@ -103,7 +103,8 @@ public:
   NS_IMETHOD         CreateFontCache();
 
   virtual void GetFontMetricsContext(nsFontMetricsXlibContext *&aContext) { aContext = mFontMetricsContext; };
-
+  virtual void GetRCContext(nsRenderingContextXlibContext *&aContext) { aContext = mRCContext; };
+ 
 protected:
   virtual         ~nsDeviceContextXp();
   void             DestroyXPContext();
@@ -112,6 +113,7 @@ protected:
   nsCOMPtr<nsIDeviceContextSpec> mSpec;
   nsCOMPtr<nsIDeviceContext>     mParentDeviceContext;
   nsFontMetricsXlibContext      *mFontMetricsContext;
+  nsRenderingContextXlibContext *mRCContext;
 };
 
 #endif /* !nsDeviceContextXp_h___ */

layout/printing/nsPrintEngine.cpp

@@ -584,19 +584,6 @@ nsPrintEngine::Print(nsIPrintSettings*       aPrintSettings,
   nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(mContainer));
   NS_ASSERTION(docShell, "This has to be a docshell");
 
-
-  if (mIsDoingPrintPreview) {
-    PRBool okToPrint = PR_FALSE;
-    nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
-    if (prefBranch) {
-      prefBranch->GetBoolPref("print.whileInPrintPreview", &okToPrint);
-    }
-    if (!okToPrint) {
-      ShowPrintErrorDialog(NS_ERROR_GFX_PRINTER_PRINT_WHILE_PREVIEW, PR_FALSE);
-      return NS_OK;
-    }
-  }
-
   mPrt = new nsPrintData(nsPrintData::eIsPrinting);
   if (!mPrt) {
     PR_PL(("NS_ERROR_OUT_OF_MEMORY - Creating PrintData"));

xpfe/communicator/resources/content/printPreviewBindings.xml

@@ -170,15 +170,35 @@
         } catch(e) {}
 
 
-        // XXX TEMPORARY
+        // Hide the ``Print...'' button when the underlying gfx code does not
-        // XXX Until bug 119491 ("Cleanup global vars in PostScript and Xprint
+        // support multiple devicecontext to be used concurrently
-        // modules") is fixed we will hide the ``Print...'' button
+        // (e.g. printing and printpreview at the same time; required as 
+        // legacy support for unices.'s PostScript module (Xprint
+        // on unices.does not have problems with that))
         // XXX the scaling widgets, and the orientation widgets on unices.
         var canPrint = true;
         try
         {
           var prefs = Components.classes["@mozilla.org/preferences-service;1"].getService(Components.interfaces.nsIPrefBranch);
           canPrint = prefs.getBoolPref("print.whileInPrintPreview");
+          if (!canPrint)
+          {           
+            // Ask the printerfeatures database if this printer device 
+            // supports multiple device instances which can be used
+            // concurrently
+            var smdci = prefs.getBoolPref("print.tmp.printerfeatures." + 
+                                          print.currentPrintSettings.printerName +
+                                          ".can_use_multiple_devicecontexts_concurrently");
+
+            // We can print from print preview when we can use multiple
+            // devicecontext instances in parallel (regardless what
+            // "print.whileInPrintPreview" may say here...)
+            if (smdci)
+            {
+              canPrint = true;
+            }
+          }
+
         } catch(e) {}
 
         if (!canPrint)
@@ -197,7 +217,6 @@
             document.getAnonymousNodes(this)[i].setAttribute("hidden", "true");
           }
         }
-        // XXX TEMPORARY
       ]]>
       </constructor>