widget/nsDeviceContextSpecProxy.h
author Nicholas Nethercote <nnethercote@mozilla.com>
Wed, 25 Oct 2017 10:22:38 +1100
changeset 387909 3d0093f961eec929caa370444cd0f7fcbfbc82bc
parent 386572 62081d87bcc9970e74d71d07e3b916c7926fb9a7
child 394973 87f5eb24ef4b510fa73db427e80bc011f6160bde
permissions -rw-r--r--
Bug 1410794 - Change some |string| occurrences in nsIPrefBranch.idl to |ACString|. r=erahm. This makes the code nicer. In particular, it removes many getter_Copies() calls. The patch also converts a lot of nsCStrings to nsAutoCString, which will avoid heap allocation in the common case. The patch also renames PREF_CopyCharPref() as PREF_GetCStringPref(), because it's actually getting a string, not a char, and that matches the existing GetCString() and GetDefaultCString() methods. Correspondingly, it also renames PREF_SetCharPref() as PREF_SetCStringPref(). The |aPrefName| arguments in nsIPrefBranch.idl remain as |string| because they almost always involve passing in C string literals, and passing "foo" is much nicer than passing NS_LITERAL_CSTRING("foo"). It's worth noting that early versions of this patch used |AUTF8String| instead of |ACString|. But it turns out that libpref stores prefs internally as Latin1. And |ACString| is compatible with Latin1 but |AUTF8String| isn't, because non-ASCII Latin1 strings are not valid UTF-8!

/* -*- 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/. */

#ifndef nsDeviceContextSpecProxy_h
#define nsDeviceContextSpecProxy_h

#include "nsIDeviceContextSpec.h"
#include "nsCOMPtr.h"
#include "nsString.h"
#include "mozilla/layout/printing/DrawEventRecorder.h"

class nsIFile;
class nsIPrintSession;
class nsIUUIDGenerator;

namespace mozilla {
namespace layout {
class RemotePrintJobChild;
}
}

class nsDeviceContextSpecProxy final : public nsIDeviceContextSpec
{
public:
  NS_DECL_ISUPPORTS

  NS_IMETHOD Init(nsIWidget* aWidget, nsIPrintSettings* aPrintSettings,
                 bool aIsPrintPreview) final;

  virtual already_AddRefed<PrintTarget> MakePrintTarget() final;

  NS_IMETHOD GetDrawEventRecorder(mozilla::gfx::DrawEventRecorder** aDrawEventRecorder) final;

  float GetDPI() final;

  float GetPrintingScale() final;


  NS_IMETHOD BeginDocument(const nsAString& aTitle,
                           const nsAString& aPrintToFileName,
                           int32_t aStartPage, int32_t aEndPage) final;

  NS_IMETHOD EndDocument() final;

  NS_IMETHOD AbortDocument() final;

  NS_IMETHOD BeginPage() final;

  NS_IMETHOD EndPage() final;

private:
  ~nsDeviceContextSpecProxy() {}

  nsresult CreateUniqueTempPath(nsACString& aFilePath);

  nsCOMPtr<nsIPrintSettings> mPrintSettings;
  nsCOMPtr<nsIPrintSession> mPrintSession;
  nsCOMPtr<nsIDeviceContextSpec> mRealDeviceContextSpec;
  RefPtr<mozilla::layout::RemotePrintJobChild> mRemotePrintJob;
  RefPtr<mozilla::layout::DrawEventRecorderPRFileDesc> mRecorder;
  nsCOMPtr<nsIFile> mRecordingDir;
  nsCOMPtr<nsIUUIDGenerator> mUuidGenerator;
  nsCString mRecordingFileName;
};

#endif // nsDeviceContextSpecProxy_h