The Tor Browser: gfx/thebes/gfxPDFSurface.cpp@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     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 "gfxPDFSurface.h"

     8 #include "cairo.h"

     9 #include "cairo-pdf.h"

    11 static cairo_status_t

    12 write_func(void *closure, const unsigned char *data, unsigned int length)

    13 {

    14     nsCOMPtr<nsIOutputStream> out = reinterpret_cast<nsIOutputStream*>(closure);

    15     do {

    16         uint32_t wrote = 0;

    17         if (NS_FAILED(out->Write((const char*)data, length, &wrote)))

    18             break;

    19         data += wrote; length -= wrote;

    20     } while (length > 0);

    21     NS_ASSERTION(length == 0, "not everything was written to the file");

    22     return CAIRO_STATUS_SUCCESS;

    23 }

    25 gfxPDFSurface::gfxPDFSurface(nsIOutputStream *aStream, const gfxSize& aSizeInPoints)

    26     : mStream(aStream), mXDPI(-1), mYDPI(-1), mSize(aSizeInPoints)

    27 {

    28     Init(cairo_pdf_surface_create_for_stream(write_func, (void*)mStream, mSize.width, mSize.height));

    29 }

    31 gfxPDFSurface::~gfxPDFSurface()

    32 {

    33 }

    35 nsresult

    36 gfxPDFSurface::BeginPrinting(const nsAString& aTitle, const nsAString& aPrintToFileName)

    37 {

    38     return NS_OK;

    39 }

    41 nsresult

    42 gfxPDFSurface::EndPrinting()

    43 {

    44     return NS_OK;

    45 }

    47 nsresult

    48 gfxPDFSurface::AbortPrinting()

    49 {

    50     return NS_OK;

    51 }

    53 nsresult

    54 gfxPDFSurface::BeginPage()

    55 {

    56     return NS_OK;

    57 }

    59 nsresult

    60 gfxPDFSurface::EndPage()

    61 {

    62     cairo_surface_show_page(CairoSurface());

    63     return NS_OK;

    64 }

    66 void

    67 gfxPDFSurface::Finish()

    68 {

    69     gfxASurface::Finish();

    70     mStream->Close();

    71 }

    73 void

    74 gfxPDFSurface::SetDPI(double xDPI, double yDPI)

    75 {

    76     mXDPI = xDPI;

    77     mYDPI = yDPI;

    78     cairo_surface_set_fallback_resolution(CairoSurface(), xDPI, yDPI);

    79 }

    81 void

    82 gfxPDFSurface::GetDPI(double *xDPI, double *yDPI)

    83 {

    84     *xDPI = mXDPI;

    85     *yDPI = mYDPI;

    86 }

The Tor Browser / file revision

gfx/thebes/gfxPDFSurface.cpp@97036ab72558

gfx/thebes/gfxPDFSurface.cpp