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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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layout/printing/nsPrintObject.cpp Normal file
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsPrintObject.h"
#include "nsIContentViewer.h"
#include "nsIDOMDocument.h"
#include "nsContentUtils.h" // for nsAutoScriptBlocker
#include "nsIInterfaceRequestorUtils.h"
#include "nsPIDOMWindow.h"
#include "nsGkAtoms.h"
#include "nsComponentManagerUtils.h"
#include "nsIDocShellTreeItem.h"
#include "nsIBaseWindow.h"
#include "nsIDocument.h"
//---------------------------------------------------
//-- nsPrintObject Class Impl
//---------------------------------------------------
nsPrintObject::nsPrintObject() :
mContent(nullptr), mFrameType(eFrame), mParent(nullptr),
mHasBeenPrinted(false), mDontPrint(true), mPrintAsIs(false),
mInvisible(false), mDidCreateDocShell(false),
mShrinkRatio(1.0), mZoomRatio(1.0)
{
MOZ_COUNT_CTOR(nsPrintObject);
}
nsPrintObject::~nsPrintObject()
{
MOZ_COUNT_DTOR(nsPrintObject);
for (uint32_t i=0;i<mKids.Length();i++) {
nsPrintObject* po = mKids[i];
delete po;
}
DestroyPresentation();
if (mDidCreateDocShell && mDocShell) {
nsCOMPtr<nsIBaseWindow> baseWin(do_QueryInterface(mDocShell));
if (baseWin) {
baseWin->Destroy();
}
}
mDocShell = nullptr;
mTreeOwner = nullptr; // mTreeOwner must be released after mDocShell;
}
//------------------------------------------------------------------
nsresult
nsPrintObject::Init(nsIDocShell* aDocShell, nsIDOMDocument* aDoc,
bool aPrintPreview)
{
mPrintPreview = aPrintPreview;
if (mPrintPreview || mParent) {
mDocShell = aDocShell;
} else {
mTreeOwner = do_GetInterface(aDocShell);
// Create a container docshell for printing.
mDocShell = do_CreateInstance("@mozilla.org/docshell;1");
NS_ENSURE_TRUE(mDocShell, NS_ERROR_OUT_OF_MEMORY);
mDidCreateDocShell = true;
mDocShell->SetItemType(aDocShell->ItemType());
mDocShell->SetTreeOwner(mTreeOwner);
}
NS_ENSURE_TRUE(mDocShell, NS_ERROR_FAILURE);
// Keep the document related to this docshell alive
nsCOMPtr<nsIDOMDocument> dummy = do_GetInterface(mDocShell);
mozilla::Unused << dummy;
nsCOMPtr<nsIContentViewer> viewer;
mDocShell->GetContentViewer(getter_AddRefs(viewer));
NS_ENSURE_STATE(viewer);
nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
NS_ENSURE_STATE(doc);
if (mParent) {
nsCOMPtr<nsPIDOMWindowOuter> window = doc->GetWindow();
if (window) {
mContent = window->GetFrameElementInternal();
}
mDocument = doc;
return NS_OK;
}
mDocument = doc->CreateStaticClone(mDocShell);
nsCOMPtr<nsIDOMDocument> clonedDOMDoc = do_QueryInterface(mDocument);
NS_ENSURE_STATE(clonedDOMDoc);
viewer->SetDOMDocument(clonedDOMDoc);
return NS_OK;
}
//------------------------------------------------------------------
// Resets PO by destroying the presentation
void
nsPrintObject::DestroyPresentation()
{
if (mPresShell) {
mPresShell->EndObservingDocument();
nsAutoScriptBlocker scriptBlocker;
nsCOMPtr<nsIPresShell> shell = mPresShell;
mPresShell = nullptr;
shell->Destroy();
}
mPresContext = nullptr;
mViewManager = nullptr;
}