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Don't create multiple XPrint or PostScript device contexts -- the

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contexts share globals and are careless... Bug 127627, patch by Roland
Mainz <Roland.Mainz@informatik.med.uni-giessen.de>, r=bryner,rods,
sr=jag, a=asa
This commit is contained in:
bzbarsky%mit.edu 2002-02-26 04:05:05 +00:00
parent be7e92f3cd
commit 64367531bf
2 changed files with 72 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
gfx/src/ps/nsDeviceContextPS.cpp
View File

@ -36,6 +36,14 @@
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* PostScript/Xprint print modules do not support more than one object
* instance because they use global vars which cannot be shared between
* multiple instances...
* bug 119491 ("Cleanup global vars in PostScript and Xprint modules) will fix
* that...
*/
#define WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS 1
#include "nsDeviceContextPS.h"
#include "nsRenderingContextPS.h"
@ -43,6 +51,10 @@
#include "nsFontMetricsPS.h"
#include "nsPostScriptObj.h"
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
static int instance_counter = 0;
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
/** ---------------------------------------------------
* See documentation in nsIDeviceContext.h
* @update 12/21/98 dwc
@ -52,6 +64,11 @@ nsDeviceContextPS :: nsDeviceContextPS()
{
mSpec = nsnull;
mParentDeviceContext = nsnull;
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
instance_counter++;
NS_ASSERTION(instance_counter < 2, "Cannot have more than one print device context.");
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
}
/** ---------------------------------------------------
@ -63,6 +80,11 @@ nsDeviceContextPS :: ~nsDeviceContextPS()
/* nsCOMPtr<> will dispose the objects... */
mSpec = nsnull;
mParentDeviceContext = nsnull;
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
instance_counter--;
NS_ASSERTION(instance_counter >= 0, "We cannot have less than zero instances.");
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
}
NS_IMETHODIMP
@ -70,6 +92,13 @@ nsDeviceContextPS :: SetSpec(nsIDeviceContextSpec* aSpec)
{
nsresult rv = NS_ERROR_FAILURE;
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
NS_ASSERTION(instance_counter < 2, "Cannot have more than one print device context.");
if (instance_counter > 1) {
return NS_ERROR_GFX_PRINTER_PRINT_WHILE_PREVIEW;
}
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
mSpec = aSpec;
nsCOMPtr<nsIDeviceContextSpecPS> psSpec;
@ -100,6 +129,13 @@ nsDeviceContextPS::InitDeviceContextPS(nsIDeviceContext *aCreatingDeviceContext,
float origscale, newscale;
float t2d, a2d;
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
NS_ASSERTION(instance_counter < 2, "Cannot have more than one print device context.");
if (instance_counter > 1) {
return NS_ERROR_GFX_PRINTER_PRINT_WHILE_PREVIEW;
}
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
mDepth = 1; // just for arguments sake
mTwipsToPixels = (float)72.0/(float)NSIntPointsToTwips(72);

37
gfx/src/xprint/nsDeviceContextXP.cpp
View File

@ -38,6 +38,14 @@
*
* ***** END LICENSE BLOCK ***** */
/* PostScript/Xprint print modules do not support more than one object
* instance because they use global vars which cannot be shared between
* multiple instances...
* bug 119491 ("Cleanup global vars in PostScript and Xprint modules) will fix
* that...
*/
#define WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS 1
#include "nsDeviceContextXP.h"
#include "nsRenderingContextXp.h"
#include "nsFontMetricsXlib.h"
@ -50,6 +58,10 @@
static PRLogModuleInfo *nsDeviceContextXpLM = PR_NewLogModule("nsDeviceContextXp");
#endif /* PR_LOGGING */
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
static int instance_counter = 0;
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
/** ---------------------------------------------------
* See documentation in nsIDeviceContext.h
*/
@ -59,6 +71,11 @@ nsDeviceContextXp :: nsDeviceContextXp()
mPrintContext = nsnull;
mSpec = nsnull;
mParentDeviceContext = nsnull;
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
instance_counter++;
NS_ASSERTION(instance_counter < 2, "Cannot have more than one print device context.");
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
}
/** ---------------------------------------------------
@ -68,6 +85,11 @@ nsDeviceContextXp :: nsDeviceContextXp()
nsDeviceContextXp :: ~nsDeviceContextXp()
{
DestroyXPContext();
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
instance_counter--;
NS_ASSERTION(instance_counter >= 0, "We cannot have less than zero instances.");
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
}
@ -75,9 +97,15 @@ NS_IMETHODIMP
nsDeviceContextXp::SetSpec(nsIDeviceContextSpec* aSpec)
{
nsresult rv = NS_ERROR_FAILURE;
PR_LOG(nsDeviceContextXpLM, PR_LOG_DEBUG, ("nsDeviceContextXp::SetSpec()\n"));
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
NS_ASSERTION(instance_counter < 2, "Cannot have more than one print device context.");
if (instance_counter > 1) {
return NS_ERROR_GFX_PRINTER_PRINT_WHILE_PREVIEW;
}
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
nsCOMPtr<nsIDeviceContextSpecXp> xpSpec;
mSpec = aSpec;
@ -114,6 +142,13 @@ nsDeviceContextXp::InitDeviceContextXP(nsIDeviceContext *aCreatingDeviceContext,
float t2d, a2d;
int print_resolution;
#ifdef WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS
NS_ASSERTION(instance_counter < 2, "Cannot have more than one print device context.");
if (instance_counter > 1) {
return NS_ERROR_GFX_PRINTER_PRINT_WHILE_PREVIEW;
}
#endif /* WE_DO_NOT_SUPPORT_MULTIPLE_PRINT_DEVICECONTEXTS */
mPrintContext->GetPrintResolution(print_resolution);
mPixelsToTwips = (float)NSIntPointsToTwips(72) / (float)print_resolution;