The Tor Browser: layout/printing/nsPrintObject.cpp@925c144e1f1f

     1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #include "nsPrintObject.h"

     7 #include "nsIContentViewer.h"

     8 #include "nsIDOMDocument.h"

     9 #include "nsContentUtils.h" // for nsAutoScriptBlocker

    10 #include "nsIInterfaceRequestorUtils.h"

    11 #include "nsPIDOMWindow.h"

    12 #include "nsGkAtoms.h"

    13 #include "nsComponentManagerUtils.h"

    14 #include "nsIDocShellTreeItem.h"

    15 #include "nsIBaseWindow.h"

    16 #include "nsIDocument.h"

    18 //---------------------------------------------------

    19 //-- nsPrintObject Class Impl

    20 //---------------------------------------------------

    21 nsPrintObject::nsPrintObject() :

    22   mContent(nullptr), mFrameType(eFrame), mParent(nullptr),

    23   mHasBeenPrinted(false), mDontPrint(true), mPrintAsIs(false),

    24   mInvisible(false), mDidCreateDocShell(false),

    25   mShrinkRatio(1.0), mZoomRatio(1.0)

    26 {

    27   MOZ_COUNT_CTOR(nsPrintObject);

    28 }

    31 nsPrintObject::~nsPrintObject()

    32 {

    33   MOZ_COUNT_DTOR(nsPrintObject);

    34   for (uint32_t i=0;i<mKids.Length();i++) {

    35     nsPrintObject* po = mKids[i];

    36     delete po;

    37   }

    39   DestroyPresentation();

    40   if (mDidCreateDocShell && mDocShell) {

    41     nsCOMPtr<nsIBaseWindow> baseWin(do_QueryInterface(mDocShell));

    42     if (baseWin) {

    43       baseWin->Destroy();

    44     }

    45   }

    46   mDocShell = nullptr;

    47   mTreeOwner = nullptr; // mTreeOwner must be released after mDocShell;

    48 }

    50 //------------------------------------------------------------------

    51 nsresult

    52 nsPrintObject::Init(nsIDocShell* aDocShell, nsIDOMDocument* aDoc,

    53                     bool aPrintPreview)

    54 {

    55   mPrintPreview = aPrintPreview;

    57   if (mPrintPreview || mParent) {

    58     mDocShell = aDocShell;

    59   } else {

    60     mTreeOwner = do_GetInterface(aDocShell);

    61     // Create a container docshell for printing.

    62     mDocShell = do_CreateInstance("@mozilla.org/docshell;1");

    63     NS_ENSURE_TRUE(mDocShell, NS_ERROR_OUT_OF_MEMORY);

    64     mDidCreateDocShell = true;

    65     mDocShell->SetItemType(aDocShell->ItemType());

    66     mDocShell->SetTreeOwner(mTreeOwner);

    67   }

    68   NS_ENSURE_TRUE(mDocShell, NS_ERROR_FAILURE);

    70   nsCOMPtr<nsIDOMDocument> dummy = do_GetInterface(mDocShell);

    71   nsCOMPtr<nsIContentViewer> viewer;

    72   mDocShell->GetContentViewer(getter_AddRefs(viewer));

    73   NS_ENSURE_STATE(viewer);

    75   nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);

    76   NS_ENSURE_STATE(doc);

    78   if (mParent) {

    79     nsCOMPtr<nsPIDOMWindow> window = doc->GetWindow();

    80     if (window) {

    81       mContent = do_QueryInterface(window->GetFrameElementInternal());

    82     }

    83     mDocument = doc;

    84     return NS_OK;

    85   }

    87   mDocument = doc->CreateStaticClone(mDocShell);

    88   nsCOMPtr<nsIDOMDocument> clonedDOMDoc = do_QueryInterface(mDocument);

    89   NS_ENSURE_STATE(clonedDOMDoc);

    91   viewer->SetDOMDocument(clonedDOMDoc);

    92   return NS_OK;

    93 }

    95 //------------------------------------------------------------------

    96 // Resets PO by destroying the presentation

    97 void

    98 nsPrintObject::DestroyPresentation()

    99 {

   100   if (mPresShell) {

   101     mPresShell->EndObservingDocument();

   102     nsAutoScriptBlocker scriptBlocker;

   103     nsCOMPtr<nsIPresShell> shell = mPresShell;

   104     mPresShell = nullptr;

   105     shell->Destroy();

   106   }

   107   mPresContext = nullptr;

   108   mViewManager = nullptr;

   109 }

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