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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsDeviceContextSpecProxy.h"
#include "gfxASurface.h"
#include "gfxPlatform.h"
#include "mozilla/gfx/DrawEventRecorder.h"
#include "mozilla/gfx/PrintTargetThebes.h"
#include "mozilla/layout/RemotePrintJobChild.h"
#include "mozilla/RefPtr.h"
#include "mozilla/Unused.h"
#include "nsComponentManagerUtils.h"
#include "nsAppDirectoryServiceDefs.h"
#include "nsDirectoryServiceUtils.h"
#include "nsIPrintSession.h"
#include "nsIPrintSettings.h"
#include "private/pprio.h"
using mozilla::Unused;
using namespace mozilla;
using namespace mozilla::gfx;
NS_IMPL_ISUPPORTS(nsDeviceContextSpecProxy, nsIDeviceContextSpec)
NS_IMETHODIMP
nsDeviceContextSpecProxy::Init(nsIWidget* aWidget,
nsIPrintSettings* aPrintSettings,
bool aIsPrintPreview) {
nsresult rv;
mRealDeviceContextSpec =
do_CreateInstance("@mozilla.org/gfx/devicecontextspec;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mRealDeviceContextSpec->Init(nullptr, aPrintSettings, aIsPrintPreview);
if (NS_WARN_IF(NS_FAILED(rv))) {
mRealDeviceContextSpec = nullptr;
return rv;
}
mPrintSettings = aPrintSettings;
if (aIsPrintPreview) {
return NS_OK;
}
// nsIPrintSettings only has a weak reference to nsIPrintSession, so we hold
// it to make sure it's available for the lifetime of the print.
rv = mPrintSettings->GetPrintSession(getter_AddRefs(mPrintSession));
if (NS_FAILED(rv) || !mPrintSession) {
NS_WARNING("We can't print via the parent without an nsIPrintSession.");
return NS_ERROR_FAILURE;
}
mRemotePrintJob = mPrintSession->GetRemotePrintJob();
if (!mRemotePrintJob) {
NS_WARNING("We can't print via the parent without a RemotePrintJobChild.");
return NS_ERROR_FAILURE;
}
return NS_OK;
}
already_AddRefed<PrintTarget> nsDeviceContextSpecProxy::MakePrintTarget() {
MOZ_ASSERT(mRealDeviceContextSpec);
double width, height;
nsresult rv = mPrintSettings->GetEffectivePageSize(&width, &height);
if (NS_WARN_IF(NS_FAILED(rv)) || width <= 0 || height <= 0) {
return nullptr;
}
// convert twips to points
width /= TWIPS_PER_POINT_FLOAT;
height /= TWIPS_PER_POINT_FLOAT;
RefPtr<gfxASurface> surface =
gfxPlatform::GetPlatform()->CreateOffscreenSurface(
mozilla::gfx::IntSize::Truncate(width, height),
mozilla::gfx::SurfaceFormat::A8R8G8B8_UINT32);
if (!surface) {
return nullptr;
}
// The type of PrintTarget that we return here shouldn't really matter since
// our implementation of GetDrawEventRecorder returns an object, which means
// the DrawTarget returned by the PrintTarget will be a
// DrawTargetWrapAndRecord. The recording will be serialized and sent over to
// the parent process where PrintTranslator::TranslateRecording will call
// MakePrintTarget (indirectly via PrintTranslator::CreateDrawTarget) on
// whatever type of nsIDeviceContextSpecProxy is created for the platform that
// we are running on. It is that DrawTarget that the recording will be
// replayed on to print.
// XXX(jwatt): The above isn't quite true. We do want to use a
// PrintTargetRecording here, but we can't until bug 1280324 is figured out
// and fixed otherwise we will cause bug 1280181 to happen again.
RefPtr<PrintTarget> target = PrintTargetThebes::CreateOrNull(surface);
return target.forget();
}
NS_IMETHODIMP
nsDeviceContextSpecProxy::GetDrawEventRecorder(
mozilla::gfx::DrawEventRecorder** aDrawEventRecorder) {
MOZ_ASSERT(aDrawEventRecorder);
RefPtr<mozilla::gfx::DrawEventRecorder> result = mRecorder;
result.forget(aDrawEventRecorder);
return NS_OK;
}
float nsDeviceContextSpecProxy::GetDPI() {
MOZ_ASSERT(mRealDeviceContextSpec);
return mRealDeviceContextSpec->GetDPI();
}
float nsDeviceContextSpecProxy::GetPrintingScale() {
MOZ_ASSERT(mRealDeviceContextSpec);
return mRealDeviceContextSpec->GetPrintingScale();
}
gfxPoint nsDeviceContextSpecProxy::GetPrintingTranslate() {
MOZ_ASSERT(mRealDeviceContextSpec);
return mRealDeviceContextSpec->GetPrintingTranslate();
}
NS_IMETHODIMP
nsDeviceContextSpecProxy::BeginDocument(const nsAString& aTitle,
const nsAString& aPrintToFileName,
int32_t aStartPage, int32_t aEndPage) {
mRecorder = new mozilla::layout::DrawEventRecorderPRFileDesc();
nsresult rv = mRemotePrintJob->InitializePrint(
nsString(aTitle), nsString(aPrintToFileName), aStartPage, aEndPage);
if (NS_FAILED(rv)) {
// The parent process will send a 'delete' message to tell this process to
// delete our RemotePrintJobChild. As soon as we return to the event loop
// and evaluate that message we will crash if we try to access
// mRemotePrintJob. We must not try to use it again.
mRemotePrintJob = nullptr;
}
return rv;
}
NS_IMETHODIMP
nsDeviceContextSpecProxy::EndDocument() {
if (mRemotePrintJob) {
Unused << mRemotePrintJob->SendFinalizePrint();
}
return NS_OK;
}
NS_IMETHODIMP
nsDeviceContextSpecProxy::AbortDocument() {
if (mRemotePrintJob) {
Unused << mRemotePrintJob->SendAbortPrint(NS_OK);
}
return NS_OK;
}
NS_IMETHODIMP
nsDeviceContextSpecProxy::BeginPage() {
mRecorder->OpenFD(mRemotePrintJob->GetNextPageFD());
return NS_OK;
}
NS_IMETHODIMP
nsDeviceContextSpecProxy::EndPage() {
// Send the page recording to the parent.
mRecorder->Close();
mRemotePrintJob->ProcessPage();
return NS_OK;
}