зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
3.8 KiB
C++
123 строки
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsPrintObject.h"
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#include "nsIContentViewer.h"
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#include "nsIDOMDocument.h"
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#include "nsContentUtils.h"
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#include "nsIInterfaceRequestorUtils.h"
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#include "nsPIDOMWindow.h"
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#include "nsGkAtoms.h"
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#include "nsComponentManagerUtils.h"
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#include "nsIDocShellTreeItem.h"
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#include "nsIBaseWindow.h"
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#ifdef MOZ_CRASHREPORTER
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#include "nsExceptionHandler.h"
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#endif
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//---------------------------------------------------
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//-- nsPrintObject Class Impl
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//---------------------------------------------------
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nsPrintObject::nsPrintObject() :
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mContent(nullptr), mFrameType(eFrame), mParent(nullptr),
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mHasBeenPrinted(false), mDontPrint(true), mPrintAsIs(false),
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mInvisible(false), mDidCreateDocShell(false),
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mShrinkRatio(1.0), mZoomRatio(1.0)
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{
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MOZ_COUNT_CTOR(nsPrintObject);
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}
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nsPrintObject::~nsPrintObject()
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{
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MOZ_COUNT_DTOR(nsPrintObject);
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for (uint32_t i=0;i<mKids.Length();i++) {
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nsPrintObject* po = mKids[i];
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delete po;
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}
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DestroyPresentation();
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if (mDidCreateDocShell && mDocShell) {
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nsCOMPtr<nsIBaseWindow> baseWin(do_QueryInterface(mDocShell));
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if (baseWin) {
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baseWin->Destroy();
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}
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}
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mDocShell = nullptr;
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mTreeOwner = nullptr; // mTreeOwner must be released after mDocShell;
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}
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//------------------------------------------------------------------
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nsresult
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nsPrintObject::Init(nsIDocShell* aDocShell, nsIDOMDocument* aDoc,
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bool aPrintPreview)
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{
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mPrintPreview = aPrintPreview;
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if (mPrintPreview || mParent) {
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mDocShell = aDocShell;
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} else {
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mTreeOwner = do_GetInterface(aDocShell);
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nsCOMPtr<nsIDocShellTreeItem> item = do_QueryInterface(aDocShell);
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int32_t itemType = 0;
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item->GetItemType(&itemType);
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// Create a container docshell for printing.
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mDocShell = do_CreateInstance("@mozilla.org/docshell;1");
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NS_ENSURE_TRUE(mDocShell, NS_ERROR_OUT_OF_MEMORY);
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mDidCreateDocShell = true;
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nsCOMPtr<nsIDocShellTreeItem> newItem = do_QueryInterface(mDocShell);
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newItem->SetItemType(itemType);
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newItem->SetTreeOwner(mTreeOwner);
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}
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NS_ENSURE_TRUE(mDocShell, NS_ERROR_FAILURE);
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nsCOMPtr<nsIDOMDocument> dummy = do_GetInterface(mDocShell);
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nsCOMPtr<nsIContentViewer> viewer;
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mDocShell->GetContentViewer(getter_AddRefs(viewer));
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NS_ENSURE_STATE(viewer);
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nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
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NS_ENSURE_STATE(doc);
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if (mParent) {
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nsCOMPtr<nsPIDOMWindow> window = doc->GetWindow();
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if (window) {
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mContent = do_QueryInterface(window->GetFrameElementInternal());
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}
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mDocument = doc;
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return NS_OK;
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}
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mDocument = doc->CreateStaticClone(mDocShell);
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nsCOMPtr<nsIDOMDocument> clonedDOMDoc = do_QueryInterface(mDocument);
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NS_ENSURE_STATE(clonedDOMDoc);
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viewer->SetDOMDocument(clonedDOMDoc);
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return NS_OK;
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}
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//------------------------------------------------------------------
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// Resets PO by destroying the presentation
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void
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nsPrintObject::DestroyPresentation()
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{
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if (mPresShell) {
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#ifdef MOZ_CRASHREPORTER
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if (mPresShell->GetPresContext() && !mPresShell->GetPresContext()->GetPresShell()) {
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NS_ASSERTION(false, "about to destroy print object's PresShell when its pres context no longer has it");
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CrashReporter::AppendAppNotesToCrashReport(NS_LITERAL_CSTRING("about to destroy print object's PresShell when its pres context no longer has it\n"));
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}
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#endif
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mPresShell->EndObservingDocument();
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nsAutoScriptBlocker scriptBlocker;
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mPresShell->Destroy();
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}
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mPresContext = nullptr;
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mPresShell = nullptr;
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mViewManager = nullptr;
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}
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